CN104565445A - Refrigerant switching valve and equipment provided with refrigerant switching valve - Google Patents

Abstract

The invention provides a refrigerant switching valve advantaged by being high in precision and improved in reliability and equipment utilizing the refrigerant switching valve. The refrigerant switching valve is provided with a valve core (80), a valve housing (66) covering the valve core (80) and comprising an opened end and a valve seat plate (67) arranged at one end of the valve housing (66).The valve seat plate (67) is provided with a first valve seat plate portion (67a) and a peripheral valve seat plate portion (67c) arranged on the periphery of the first valve seat plate portion (67a) and thinner than the first valve seat plate portion (67a). The valve housing (66) is provided with an extending portion expanding towards an opening side. The extending portion is located at the height size of a ladder (H) formed by the first valve seat plate portion (67a) and the peripheral valve seat plate portion (67c). A welding portion is formed by the periphery of the valve housing (66) and the periphery of the peripheral valve seat plate portion (67c).

Description

Cold-producing medium transfer valve and possess the equipment of cold-producing medium transfer valve

Technical field

The present invention relates to cold-producing medium transfer valve and possess the equipment of cold-producing medium transfer valve.

Background technology

As background technology of the present invention, there is the invention recorded in following patent document 1 ~ patent document 4.

In patent document 1 (Japan Patent No. 4112918 publications),

Disclose in claim 1, " a kind of valve gear, it has: the seat board being through with the inflow entrance of cold-producing medium and the flow export of cold-producing medium in a thickness direction, the closure casing of the surface portion of this seat board is installed in the mode covering the face side in the face side of this seat board and rear side, and the spool of the above-mentioned inflow entrance of opening and closing or above-mentioned flow export is carried out at the surface sliding of above-mentioned seat board, the feature of above-mentioned valve gear is to have: be formed with the conduit patchhole that is communicated with respectively with above-mentioned inflow entrance and above-mentioned flow export and at the stacked catheter support plate of the rear side of above-mentioned seat board, the inflow catheter be communicated with respectively with above-mentioned inflow entrance and above-mentioned flow export at the above-mentioned conduit patchhole internal fixtion of this catheter support plate with end and flow out conduit, each end of above-mentioned inflow catheter and above-mentioned outflow conduit is brazing in above-mentioned conduit patchhole, the mode that above-mentioned seat board and above-mentioned catheter support plate stagger with the end of both sides is stacked, thus form stage portion in the outer peripheral edge on above-mentioned composition surface, the outer circumferential side on the composition surface of above-mentioned seat board and above-mentioned catheter support plate is sealed in a gas tight manner by metallic film, above-mentioned metallic film is the plated film implemented under the state of folding at above-mentioned seat board and above-mentioned catheter support flaggy, the melting because of heat during solder brazing is also concentrated because of surface tension, thus the thickness of part that the Film Thickness Ratio of the part formed in above-mentioned stage portion is formed in other region is thicker.”。

In patent document 2 (Japan Patent No. 4118034 publications), disclose in claim 1, " a kind of valve drive, have: main body, it comprises the inflow catheter of fluid and flows out conduit and become the part of fluid passage, and in establish opening and closing to be communicated with above-mentioned inflow catheter or above-mentioned outflow conduit the spool of flowing of the interrupted above-mentioned fluid of valve port, with the driver element driving above-mentioned spool, the feature of above-mentioned valve drive is, formation valve seat around valve port, the above-mentioned inflow catheter of correspondence or above-mentioned outflow conduit are connected with outside at body shell inside opening by above-mentioned valve port, through hole is worn at the seat board being formed with this valve seat, and be fixed respectively axle and rotor fulcrum, the rotary body that above-mentioned fixed axis is internally located at aforementioned body enclosure interior supports, above-mentioned rotor fulcrum can free rotary ground supporting as the rotor of above-mentioned driver element, by welding, above-mentioned fixed axis and rotor fulcrum are fixed on above-mentioned seat board, and seal above-mentioned through hole in a gas tight manner, above-mentioned rotary body to engage with the rotor pinion being formed at above-mentioned rotor and to the gear of above-mentioned spool transmission of drive force, above-mentioned fixed axis is can the gear shaft of this gear of free rotary ground supporting.”。

In patent document 3 (Japan Patent No. 4183075 publications), disclose in claim 1, " a kind of valve gear, it has: the seat board being through with the inflow entrance of fluid and the flow export of fluid in a thickness direction, to the closure casing that the face side in the face side of this seat board and rear side covers, be fixed on the inflow catheter of the rear side of above-mentioned seat board in the mode be communicated with above-mentioned inflow entrance and above-mentioned flow export and flow out conduit, on in the face side of above-mentioned seat board, to be formed with above-mentioned flow export region, slip carrys out the spool of this flow export of opening and closing, for driving the motor of above-mentioned spool, in order to be fixed on the rotor fulcrum of above-mentioned seat board with the rotor of the state support said motor that can rotate, and be formed as shorter than above-mentioned rotor fulcrum and thin, and in order to be fixed on the spool fulcrum of above-mentioned seat board with the above-mentioned spool of the state support that can rotate, the feature of above-mentioned valve gear is, above-mentioned seat board direction is split into the first plate component parts and the second plate component parts that form and be formed with the region of above-mentioned flow export in the face of this seat board, above-mentioned second plate component parts is punch process product, and the first axis hole be formed for fixing above-mentioned rotor fulcrum, above-mentioned first plate component parts is the machining product thicker than above-mentioned second plate component parts, engaged with above-mentioned second plate component parts by solder brazing, and be formed for the second little axis hole of above-mentioned first axis hole of ratio of fixing above-mentioned spool fulcrum.”。

Prior art document

Patent document 1: Japan Patent No. 4112918 publication

Patent document 2: Japan Patent No. 4118034 publication

Patent document 3: Japan Patent No. 4183075 publication

In the structure recorded in patent document 1 and patent document 2, that the double base that the two ends of rotor fulcrum are supported by the through hole (lower shaft hole) being located at seat board and the axis hole (upper shaft hole) of being located at closure casing respectively constructs, in order to maintain the perpendicularity precision of seat board and axle, require the higher axiality of lower shaft hole and upper shaft hole, thus the location needing closure casing good relative to the precision of seat board.

According to patent document 1, closure casing locates short transverse and the radial direction of closure casing by the ladder of the outer peripheral edge being formed at seat board, but does not have the regulation of the stairstepping of the seat board for the location being suitable for closure casing.

According to patent document 2, there are the following problems, namely, the short transverse of closure casing is located by the height limitation of rotor fulcrum, and the radial direction of closure casing is located by the periphery of seat board, but originally not about the record utilizing the ladder of seat board to the location that closure casing carries out, and the location of the closure casing recorded in patent document 2 is because utilizing the location of the ladder of seat board, and the contact area of the location of closure casing significantly reduces, thus there is the situation that the reliability of the perpendicularity precision of axle reduces.

In addition, there are the following problems, namely, because spool fulcrum and spool are arranged on the center deviation position to outer peripheral side than seat board, so the thermal capacitance when the periphery of welding seat plate and closure casing (valve chest) is easily to spool conduction, resinous spool temperature rises and easily thermal deformation.

In the structure recorded in patent document 3, that the double base that the two ends of rotor fulcrum are supported by the first axis hole (lower central shaft hole) being located at the second plate component parts and the axis hole (upper central shaft hole) of being located at closure casing respectively constructs, in order to maintain the perpendicularity precision of seat board and axle, require the higher axiality of the first axis hole (lower central shaft hole) and closure casing axis hole (lower central shaft hole), thus the location needing closure casing good relative to the precision of seat board.Closure casing locates short transverse and the radial direction of closure casing by the ladder of the outer peripheral edge being formed at seat board, but does not have the regulation of the stairstepping of the seat board for the location being suitable for closure casing.

Summary of the invention

In view of above-mentioned actual conditions, the object of the present invention is to provide assembly precision high and improve the cold-producing medium transfer valve of reliability and employ the equipment of this cold-producing medium transfer valve.

In order to solve such problem, the feature of cold-producing medium transfer valve is to possess: spool; Cover the valve chest of the one end open of above-mentioned spool; And be located at the seat board of one end of above-mentioned valve chest, above-mentioned seat board possesses: the first seat board portion; And be located at the periphery in above-mentioned first seat board portion and the peripheral valve seat plate portion thinner than above-mentioned first seat board portion, above-mentioned valve chest possesses the expansion section expanded towards above-mentioned open side, this expansion section is positioned at the height dimension of the ladder formed by above-mentioned first seat board portion and above-mentioned peripheral valve seat plate portion, is formed with weld part in the periphery in the periphery of above-mentioned valve chest and above-mentioned peripheral valve seat plate portion.

The effect of invention is as follows.

According to the present invention, assembly precision can be provided high and improve the cold-producing medium transfer valve of reliability and employ the equipment of this cold-producing medium transfer valve.

Accompanying drawing explanation

Fig. 1 is the front appearance figure of the refrigerator from forward observation first embodiment.

Fig. 2 is the E-E sectional view of the Fig. 1 of the structure represented in the case of refrigerator.

Fig. 3 is the front view of the functional structure represented in the case of refrigerator.

Fig. 4 is the major part amplification key diagram near the cooler of Watch with magnifier diagram 2.

Fig. 5 is the figure of the first mode of the refrigerant path representing the cold-producing medium transfer valve employing the first embodiment.

Fig. 6 is the figure of the second pattern of the refrigerant path representing the cold-producing medium transfer valve employing the first embodiment.

Fig. 7 is the figure of the 3rd pattern of the refrigerant path representing the cold-producing medium transfer valve employing the first embodiment.

Fig. 8 is the figure of the four-mode of the refrigerant path representing the cold-producing medium transfer valve employing the first embodiment.

Fig. 9 is the stereogram of the outward appearance of the cold-producing medium transfer valve representing the first embodiment.

Figure 10 is the G direction direction view of Fig. 9.

Figure 11 is the F-F sectional view of Figure 10.

Figure 12 is the stereogram of the internal structure representing cold-producing medium transfer valve, is that hypothesis takes off stator case and valve chest from cold-producing medium transfer valve and the stereogram had an X-rayed.

Figure 13 is the stereogram of the structure representing rotor pinion, idler gear and spool.

Figure 14 is the key diagram of the configuration of the connected entrance of the cold-producing medium transfer valve representing the first embodiment and the shape of spool sliding contact surface.

Figure 15 is the rotation of spool and the key diagram of open and-shut mode of the cold-producing medium transfer valve representing the first embodiment.

Figure 16 is the internal structure of cold-producing medium transfer valve, the figure of refrigerant path of the first state after the cold-producing medium transfer valve that switching first embodiment is described to the 4th state.

Figure 17 is the amplification partial sectional view representing the second seat board portion of cold-producing medium transfer valve, spool and the section of communicating pipe.

Figure 18 represents the F-F sectional view having the state of cold-producing medium inflow pipe, cold-producing medium effuser and pony axle in the seat board solder brazing of cold-producing medium transfer valve.

Figure 19 represents the stereogram having the state of cold-producing medium inflow pipe, cold-producing medium effuser and pony axle in the seat board solder brazing of cold-producing medium transfer valve.

Figure 20 represents a part of widening cold-producing medium inflow pipe and the figure it being temporarily fixed on the state of seat board.

Figure 21 is the sectional view of the seat board of cold-producing medium transfer valve.

Figure 22 is the sectional view representing the outermost perimembranous of seat board and the position relationship of valve chest.

Figure 23 is the figure of the first state to the internal structure of the cold-producing medium transfer valve of the third state of the cold-producing medium transfer valve representing the second embodiment.

Figure 24 is the stereogram of the shape of the spool of the cold-producing medium transfer valve representing the second embodiment.

Figure 25 is the figure of the first state to the internal structure of the cold-producing medium transfer valve of the 4th state of the cold-producing medium transfer valve representing the 3rd embodiment.

Figure 26 is the figure of the internal structure of the cold-producing medium transfer valve of the first state to the second state of the cold-producing medium transfer valve representing the 4th embodiment.

Figure 27 is the amplification partial sectional view of the seat board of cold-producing medium transfer valve after the pressure increase representing communicating pipe side, spool and the section of communicating pipe.

Figure 28 is the sectional view of the structure of the seat board of the cold-producing medium transfer valve representing the 5th embodiment.

In figure:

1-refrigerator (equipment), 1H2-opening circumference, 7-cooler (evaporimeter), 17-prevent condensation pipe arrangement (cold-producing medium throughput), 51-compressor, 52-condenser, 54-decompressing unit, 60-cold-producing medium transfer valve, 66-valve chest (housing), 67-seat board, 67a-the first seat board, 67b-the second seat board (valve seat), 67c-the 3rd seat board (peripheral valve seat plate), 68-inflow pipe, (the first communicating pipe 69-communicating pipe, second communicating pipe, third connecting pipe), 69b-communicating pipe (the first communicating pipe), 69c-communicating pipe (the second communicating pipe), 69d-communicating pipe (third connecting pipe), 71-poppet shaft, 80-spool, 81-spool sliding contact surface, 82-be communicated with recess (connectivity slot), 86-leaf spring (forcing unit), 87-be communicated with pore (communicating pipe connecting portion, first connected entrance, second connected entrance, third connecting mouth), 88-intercommunicating pore (communicating pipe connecting portion, first connected entrance, second connected entrance, third connecting mouth), 89-flow into pore, 90-grinding polished surface, 91-square, 92-poppet shaft, 93-armature spindle, 94-those widened sections, 95-pressure contact portion, 96-gap, 97-convex amount, 98-weld part, A-inflow entrance (inflow pipe connecting portion), B-connected entrance (communicating pipe connecting portion, first connected entrance), C-connected entrance (communicating pipe connecting portion, second connected entrance), D-connected entrance (communicating pipe connecting portion, third connecting mouth).

Detailed description of the invention

Below, be described as the embodiment for implementing mode of the present invention with reference to accompanying drawing.In addition, in each accompanying drawing, identical symbol is marked to identical part and represents, and the repetitive description thereof will be omitted.

" the first embodiment "

Fig. 1 is the front appearance figure of the refrigerator from forward observation first embodiment.Fig. 2 is the E-E sectional view of the Fig. 1 of the structure represented in the case of refrigerator.Fig. 3 is the front view of the functional structure represented in the case of refrigerator.Fig. 4 is the major part amplification key diagram near the cooler of Watch with magnifier diagram 2.

< uses the structure > of the equipment (refrigerator 1) of cold-producing medium transfer valve 60

Before the cold-producing medium transfer valve 60 (with reference to Fig. 9 etc.) of explanation first embodiment, first, as the equipment possessing cold-producing medium transfer valve 60 (with reference to Fig. 9 etc.), for refrigerator 1, and Fig. 1 to Fig. 4 is used to be described.

As shown in Figure 1, Figure 3, refrigerator 1 possesses refrigerating chamber 2, left and right ice-making compartment 3 arranged side by side and upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5 and vegetable compartment 6 at the refrigerator main body 1H of its main body from top.In addition, refrigerating chamber 2 and vegetable compartment 6 are storerooms of refrigerated storage temperature band, and temperature is such as about 3 ~ 5 DEG C.In addition, ice-making compartment 3, upper strata refrigerating chamber 4 and lower floor's refrigerating chamber 5 are storerooms of cryogenic temperature band, and temperature is such as about-18 DEG C.

As shown in Figure 1, refrigerating chamber 2 possesses refrigerating-chamber door 2a, 2b of splitting (so-called French) of left and right segmentation at front side.In addition, ice-making compartment 3, upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5 and vegetable compartment 6 possess ice-making compartment door 3a, upper strata refrigerating chamber door 4a, the lower floor refrigerating chamber door 5a and vegetable compartment door 6a of drawing and pulling type respectively.In addition, in the following description, have refrigerating-chamber door 2a, 2b, ice-making compartment door 3a, upper strata refrigerating chamber door 4a, lower floor refrigerating chamber door 5a, vegetable compartment door 6a simply referred to as the situation of door 2a, 2b, 3a, 4a, 5a, 6a.

The door spacer 15 (with reference to Fig. 2) of rubber is provided with around the inner side of door 2a, 2b, 3a, 4a, 5a, 6a.Door spacer 15 is after closedown each door 2a, 2b, 3a, 4a, 5a, 6a, by elastic deformation with refrigerator main body before 16 opening circumference 1H2 be close to close relative to space outerpace and to close storage space (refrigerating chamber 2, ice-making compartment 3, upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5, vegetable compartment 6), thus prevent cold air from externally leaking from storage space.

Refrigerator 1 has: door sensor (not shown), and it is as door opening and closing detection, reporting unit, and distinguishes the open and-shut mode of detecting gate 2a, 2b, 3a, 4a, 5a, 6a at refrigerator main body 1H; And alarm (not shown), it is when the state judging that each door 2a, 2b, 3a, 4a, 5a, 6a open wide continues stipulated time (such as, more than 1 minute), to report that sound is reported to user.

In addition, refrigerator 1 has the temperature setting device for carrying out the temperature setting of refrigerating chamber 2, the temperature setting of upper strata refrigerating chamber 4 and lower floor's refrigerating chamber 5 for user.Temperature setting device refers to the control panel 40 shown in the Fig. 1 with operating portion and display part.

As shown in Figure 2, the case of refrigerator main body 1H is outer and case is interior is separated in the mode of thermal insulation by body of thermal insulating box 10, and this body of thermal insulating box 10 is formed by filling with foam insulation materials (polyurathamc) between resinous interior case 10a and the outer container 10b of steel plate.In addition, for the body of thermal insulating box 10 of refrigerator main body 1H, in order to improve heat-insulating property, the inner surface along outer container 10b is provided with the lower multiple vacuum insulation parts 14 of heet transfer rate.

In the case of refrigerator 1, in order to suppress heat leak, have multiple storeroom by adiabatic partition wall 11a, 11b with the model split of thermal insulation, the plurality of storeroom configures on the above-below direction that refrigerated storage temperature band is different with the temperature band of cryogenic temperature band.

That is, to be divided in the mode of thermal insulation by upper adiabatic partition wall 11a and be separated with the refrigerating chamber 2 as the storeroom of refrigerated storage temperature band, the upper strata refrigerating chamber 4 of the storeroom as cryogenic temperature band and ice-making compartment 3 (with reference to not shown ice-making compartment 3 in Fig. 1, Fig. 2).In addition, to be divided in the mode of thermal insulation by lower adiabatic partition wall 11b and be separated with the lower floor's refrigerating chamber 5 as the storeroom of cryogenic temperature band and the vegetable compartment 6 as the storeroom of refrigerated storage temperature band.

Inside the case of refrigerating-chamber door 2a, 2b, as shown in Figure 2, inside case, the multiple door compartments 13 for holding (storage) drink etc. are equipped with highlightedly.In addition, refrigerating chamber 2 is divided into multiple storage space by multiple shelves 12 of mounting food etc. in vertical.

There is the rear of each door 3a, 4a, 5a, 6a that the ice-making compartment 3 of the door of drawing and pulling type, upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5 and vegetable compartment 6 are equipped with in the front of each storeroom, be respectively equipped with accommodating container 3b, 4b, 5b, 6b integratedly.And, by the not shown handle portion that hand is placed on 3a, 4a, 5a, 6a goes out to nearby layback, pull out accommodating container 3b, 4b, 5b, 6b.

< prevents the > that condenses

Herein, if open each door 2a, 2b, 3a, 4a, 5a, 6a of refrigerator main body 1H, then warm extraneous air with before refrigerator main body 16 opening circumference 1H2 contact.Particularly due in ice-making compartment 3, upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5 be cryogenic temperature band under freezing point (such as,-18 DEG C), so when opening 3a, 4a, 5a, before refrigerator main body, the opening circumference 1H2 of 16 contacts with extraneous air and cools thus become below dew point, and then becomes moisture easily 16 states condensed before refrigerator main body in extraneous air.

Further, if before refrigerator main body 16 condensation states under close door 3a, 4a, 5a, then under having the water droplet before door spacer 15 and refrigerator main body between 16 to be cooled to freezing point thus the worry freezed.

Therefore, as shown in Figure 2 and Figure 3, at the opening circumference 1H2 of ice-making compartment 3, upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5, be embedded with refrigerant piping 17, for the purpose of preventing from condensing, heat opening circumference 1H2 and improve the temperature of dew point, this refrigerant piping 17 make condenser 52 described later by after the cold-producing medium of high temperature pass through.Herein, higher than the temperature of box outside temperature (temperature of space outerpace) in the temperature (temperature of the cold-producing medium after condenser 52 described later passes through) of the cold-producing medium of refrigerant piping 17 flowing, such as, about 33 DEG C are set as when box outside temperature is 30 DEG C in the temperature of the cold-producing medium of refrigerant piping 17 flowing.

Like this, refrigerant piping 17 have utilize the heat of the cold-producing medium of flowing to before refrigerator main body 16 opening circumference 1H2 heat and the condensation that suppresses the moisture in extraneous air and the function freezed.In the following description, refrigerant piping 17 is called " preventing the pipe arrangement 17 that condenses ".

In addition, in this first embodiment, the pipe arrangement 17 that prevents from condensing is the structures of opening circumference 1H2 being arranged on ice-making compartment 3, upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5, but also can be the structure of opening 1H2 being arranged on refrigerating chamber 2, vegetable compartment 6, in this situation, obtain the effect preventing from condensing equally.

< circulating cold air >

As shown in Figure 2 and Figure 3, cooler 7 is disposed in the cooler receiving room 8 that roughly inner side is equipped with of lower floor's refrigerating chamber 5.Cooler 7 is configured to be provided with multiple fins for expanding heat-conducting area at cooler pipe arrangement 7d, carries out the heat exchange between cold-producing medium in cooler pipe arrangement 7d and air.

In addition, above cooler 7, be provided with pressure fan 9 (fan such as, be driven by a motor) in case.The air turned cold having carried out heat exchange at cooler 7 by pressure fan in case 9 is (following, the air of the low temperature after cooler 7 has carried out heat exchange is called " cold air ") via refrigerating chamber air-supply passage 22, vegetable compartment air-supply passage 25, ice-making compartment air-supply passage 26a, upper strata refrigerating chamber air-supply passage 26b and lower floor's refrigerating chamber air-supply passage 27, and be sent to each storeroom of refrigerating chamber 2, vegetable compartment 6, ice-making compartment 3, upper strata refrigerating chamber 4 and lower floor's refrigerating chamber 5.And as shown in Figure 2, each air-supply passage (22,26a, 26b, 27,25) towards refrigerating chamber 2, ice-making compartment 3, upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5 and vegetable compartment 6 is located at the rear side of each storeroom of refrigerator main body 1H.

The pressure fan support 30 being provided with pressure fan 9 in case divides between cooler receiving room 8 and the back side, cryogenic temperature band room separator 29.

As shown in Figure 4, be formed blow out blow-off outlet 3c, 4c, 5c of cold air respectively to ice-making compartment 3, upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5 the back side, cryogenic temperature band room separator 29 at upper strata refrigerating chamber 4, ice-making compartment 3 and divide between lower floor's refrigerating chamber 5 and cooler receiving room 8.

Air-supply hood 31 to be configured to cover in case before pressure fan 9.Between air-supply hood 31 and the back side, cryogenic temperature band room separator 29, be formed with ice-making compartment air-supply passage 26a, upper strata refrigerating chamber air-supply passage 26b and lower floor's refrigerating chamber air-supply passage 27 of cold air guiding blow-off outlet 3c, 4c, the 5c for being sent here by pressure fan in case 9.

In addition, be formed with blow-off outlet 31a on the top of air-supply hood 31, be provided with cryogenic temperature band room cold air control unit 21 near blow-off outlet 31a.

Further, hood 31 of blowing also realizes the effect cold air sent here by pressure fan in case 9 being delivered to cold air control unit 20 side, refrigerated storage temperature band room.That is, cold air control unit 20 side, refrigerated storage temperature band room is not directed to via refrigerating chamber upstream passageway 23 as illustrated in fig. 4 to the cold air that cryogenic temperature band room cold air control unit 21 effluent being located at air-supply hood 31 is dynamic.

In addition, hood 31 of blowing possesses rectification part 31b before pressure fan 9 in case.Rectification part 31b carries out rectification to the sinuous flow caused by the cold air of blowout, thus prevents the generation of noise.

< air door >

Which storeroom the Quilt with air conditioning of cooler 7 is sent to is controlled by the opening and closing of the refrigerated storage temperature band room cold air control unit 20 shown in Fig. 2, Fig. 3 and cryogenic temperature band room cold air control unit 21.

Herein, refrigerated storage temperature band room cold air control unit 20 is the two air doors of what is called possessing independently two first, second opening portion 20a, 20b (with reference to Fig. 3), control the air-supply of leading to refrigerating chamber air-supply passage 22 by opening and closing first opening 20a, control the air-supply of leading to vegetable compartment air-supply passage 25 by opening and closing second opening 20b.

As shown in Figure 4, cryogenic temperature band room cold air control unit 21 is the single air doors possessing independent opening portion, by opening and closing opening portion, control the air-supply of leading to ice-making compartment air-supply passage 26a, upper strata refrigerating chamber air-supply passage 26b and lower floor's refrigerating chamber air-supply passage 27.

< air door is to the cooling > of refrigerating chamber 2

When refrigerated compartment 2, if the first opening 20a making refrigerated storage temperature band room cold air control unit 20 is open mode, then cold air is via refrigerating chamber upstream passageway 23 (with reference to Fig. 4) and refrigerating chamber air-supply passage 22, and the blow-off outlet 2c (with reference to Fig. 3) arranged from multilayer is sent to refrigerating chamber 2.And the cold air after refrigerated compartment 2 from being located at the return port 2d of bottom of refrigerating chamber 2 via refrigerating chamber backward channel 24, and flows in cooler receiving room 8 from the bottom, side of cooler receiving room 8, carry out heat exchange with cooler 7 thus cooled.

< air door is to the cooling > of vegetable compartment 6

When cooling vegetable compartment 6, if the second opening 20b making refrigerated storage temperature band room cold air control unit 20 is open mode, then cold air is via refrigerating chamber upstream passageway 23 and vegetable compartment air-supply passage 25 (with reference to Fig. 3), is sent to vegetable compartment 6 from blow-off outlet 6c (with reference to Fig. 3).And the cold air after cooling vegetable compartment 6 flows in cooler receiving room 8 from the bottom of cooler receiving room 8 via return port 6d, carry out heat exchange with cooler 7 thus be cooled.

And in order to make refrigerated storage temperature slightly higher than the refrigerated storage temperature of refrigerating chamber 2, the air quantity circulated in vegetable compartment 6 is fewer than the air quantity circulated at refrigerating chamber 2, the air quantity that circulates in cryogenic temperature band room (3,4,5).

< air door is to the cooling > of refrigerating chamber (3,4,5)

When cooling refrigerating chamber (3,4,5), if make cryogenic temperature band room cold air control unit 21 for open mode, then cold air is sent to ice-making compartment 3, upper strata refrigerating chamber 4 from blow-off outlet 3c, 4c respectively via ice-making compartment air-supply passage 26a, upper strata refrigerating chamber air-supply passage 26b.In addition, cold air is sent to lower floor's refrigerating chamber 5 via lower floor's refrigerating chamber air-supply passage 27 (with reference to Fig. 2) from blow-off outlet 5c.Like this, cryogenic temperature band room cold air control unit 21 is installed on the top of air-supply hood 31 (with reference to Fig. 4), thus easily carries out the air-supply towards the refrigerating chamber be configured at below it (3,4,5).

The cold air being sent to ice-making compartment 3 via ice-making compartment air-supply passage 26a and the cold air being sent to upper strata refrigerating chamber 4 via upper strata refrigerating chamber air-supply passage 26b decline to the lower floor's refrigerating chamber 5 being configured at below.And be sent to together with the cold air of lower floor's refrigerating chamber 5 via lower floor's refrigerating chamber air-supply passage 27, via be located at lower floor's refrigerating chamber 5 inboard below refrigerating chamber return port 28 and flow in cooler receiving room 8, carry out heat exchange with cooler 7 thus cooled.

And, the width size of refrigerating chamber return port 28 and the width dimensions of cooler 7 roughly equal.

In addition, each air-supply passages etc. are configured to, when refrigerated storage temperature band room cold air control unit 20 and cryogenic temperature band room cold air control unit 21 are open mode, most cold air is sent to cold air control unit 21 side, cryogenic temperature band room, by remaining other cold air guiding cold air control unit 20 side, refrigerated storage temperature band room.Thereby, it is possible to a cooler 7 to as the cryogenic temperature band room (ice-making compartment 3, upper strata refrigerating chamber 4 and lower floor's refrigerating chamber 5) of the different storeroom of temperature band and refrigerated storage temperature band room (refrigerating chamber 2 and vegetable compartment 6) cool-air feed.

As mentioned above, the switching being sent to the cold air of each storeroom of refrigerator main body 1H can by suitably open and close controlling refrigerated storage temperature band room cold air control unit 20 and cryogenic temperature band room cold air control unit 21 carry out respectively.

Defrost heater 35 > of < defroster

As shown in Figure 4, the Defrost heater 35 as defrost unit is provided with in the below of cooler 7.Above Defrost heater 35, be provided with upper lid 36 to prevent defrost water from dripping to Defrost heater 35.

Because to defrost (melting) to the frost of wall of the cooler receiving room 8 being attached to cooler 7 and its periphery and the chute 32 that the defrost water produced is equipped with to the bottom at cooler receiving room 8 flows into, afterwards, be disposed in the evaporating dish 34 of Machine Room 50 via drainpipe 33 arrival and stockpile, the heat produced because of compressor described later 51 (with reference to Fig. 3), condenser 52 and evaporating, and discharge outside refrigerator 1.

< Machine Room >

As shown in Figure 3, Machine Room 50 is provided with in lower back (inner) side of body of thermal insulating box 10.

Be configured with in Machine Room 50: compressed refrigerant makes it to become high temperature, high pressure and the compressor 51 of being discharged; Cold-producing medium and air is made to carry out the condenser 52 of heat exchange; Promote the outer pressure fan 53 of the case of the heat exchange of the cold-producing medium in condenser 52 and air; As the decompressing unit 54 of tubule; And cold-producing medium transfer valve 60.

In addition, compressor 51, condenser 52, decompressing unit 54 and cold-producing medium transfer valve 60 are connected by pipe arrangement and cooler 7, the pipe arrangement 17 that prevents from condensing, thus are formed the refrigerant path (refrigerant loop) (following Fig. 5 to Fig. 8 is described) circulated for cold-producing medium.

< sensor, control system >

As shown in Figure 2, inboard at the upper surface of the ceiling wall 1H1 of refrigerator main body 1H, be configured with as control unit and control substrate 41, this control substrate 41 is the control units of the microcomputer, interface circuit etc. being provided with memories such as having CPU (Central Processing Unit), ROM (Read Only Memory) or RAM (Random Access Memory) etc.

Following temperature sensor is provided with: the external air temperature sensor 42 of the temperature environment (external air temperature) outside detection case at refrigerator 1; Water adsorption type solid electrolyte is such as used to carry out the extraneous air humidity sensor 43 of the humidity environment (extraneous air humidity) outside detection case; Detect the refrigerator temperature sensor 44 of the temperature of refrigerating chamber 2; Detect the vegetable compartment temperature sensor 45 of the temperature of vegetable compartment 6; Detect the freezer temperature sensor 46 of the temperature of cryogenic temperature band room (ice-making compartment 3, upper strata refrigerating chamber 4 and lower floor's refrigerating chamber 5); And the chiller temperature sensor 47 etc. of the temperature of detection cooler 7.Using the temperature that detected by the sensor as detection signal input control substrate 41.

In addition, the door sensor (not shown) controlling substrate 41 and the respectively open and-shut mode of detecting gate 2a, 2b, 3a, 4a, 5a, 6a, the control panel 40 (reference Fig. 1) being located at refrigerating-chamber door 2a are electrically connected.

And, controlling substrate 41 by performing the control program being equipped on above-mentioned ROM in advance, coming to control as follows thus controlling the running of refrigerator 1 entirety uniformly: the on/off of compressor 51 or the control of rotary speed; The separately control of each CD-ROM drive motor (not shown) of driven for opening and closing refrigerated storage temperature band room cold air control unit 20 and cryogenic temperature band room cold air control unit 21; The on/off of pressure fan 9 or the control of rotary speed in case; The control of the on/off of the outer pressure fan 53 (with reference to Fig. 3) of case or rotary speed etc.; The on/off of the alarm (not shown) of report door opening-wide state; And the control of the switching action of cold-producing medium transfer valve 60 etc.

It is more than the structure of the refrigerator 1 as equipment.

< refrigerant path (refrigerant loop) >

Next, use Fig. 5 to Fig. 8, the refrigerant path (refrigerant loop) of refrigerator 1 of cold-producing medium transfer valve 60 (with reference to Fig. 3, Fig. 9 etc.), the operation mode possessing the first embodiment is described.

Fig. 5 is the figure of the first mode of the refrigerant path representing the cold-producing medium transfer valve 60 employing the first embodiment.Fig. 6 is the figure of the second pattern of the refrigerant path representing the cold-producing medium transfer valve 60 employing the first embodiment.Fig. 7 is the figure of the 3rd pattern of the refrigerant path representing the cold-producing medium transfer valve 60 employing the first embodiment.Fig. 8 is the figure of the four-mode of the refrigerant path representing the cold-producing medium transfer valve 60 employing the first embodiment.

The first mode of Fig. 5 is common pattern, be to the pipe arrangement 17 (with reference to Fig. 2, Fig. 3) that prevents from condensing carry the cold-producing medium of high temperature thus suppress condensation prevent condensation pattern.

Second pattern of Fig. 6 is that cold-producing medium gets around the bypass mode preventing condensation pipe arrangement 17 under the environment not having the possibility condensed.

3rd pattern of Fig. 7 is the stop mode stopping compressor 51.

The four-mode of Fig. 8 realizes energy-conservation refrigerant-recovery pattern from preventing condensation pipe arrangement 17 from reclaiming cold-producing medium.

Cold-producing medium transfer valve 60 be connected with four communicating pipes (the following Fig. 9 of use wait illustrate inflow pipe 68, communicating pipe 69b, 69c, 69d), be the so-called cross valve possessing an inflow entrance A, three connected entrances B, C, D.

That is, inflow entrance A is connected with inflow pipe 68, and three connected entrances B, C, D are connected with communicating pipe 69b, 69c, 69d respectively.

As shown in Figure 5, the first refrigerant piping 55 is connected with at the upstream side of inflow entrance A.Be connected with condenser 52 at the first refrigerant piping 55 at upstream side, and side is connected with the high-pressure side outlet 51o of compressor 51 at its upstream.Being connected with one end of second refrigerant pipe arrangement 56 at connected entrance B, being connected with the other end of second refrigerant pipe arrangement 56 via preventing condensation pipe arrangement 17 at connected entrance D.The 3rd refrigerant piping 57 is connected with in the downstream of connected entrance C.

3rd refrigerant piping 57 is connected with cooler 7 via the decompressing unit 54 of the tubule as downstream.The downstream of cooler 7 is connected with the low-pressure side suction inlet 51i of compressor 51.And, as the cold-producing medium of refrigerant path (refrigerant loop), such as, can use CO during process ₂the less iso-butane of discharge.

Due to the first mode shown in Fig. 5 to Fig. 8, to four-mode, pattern is different respectively, so the open and-shut mode of cold-producing medium transfer valve 60 (connected state) is different, the path (loop) of cold-producing medium is different.

(first mode of Fig. 5) prevents condensation pattern

In first mode (preventing condensation pattern) shown in Fig. 5, the inflow entrance A of cold-producing medium transfer valve 60 is communicated with (flow of refrigerant L1) with connected entrance B, and connected entrance C is communicated with (flow of refrigerant L2) with connected entrance D.

The cold-producing medium of the HTHP after being compressed by compressor 51 flows into condenser 52, and carries out heat exchange with air (case outer air) and cool in condenser 52.The cold-producing medium flowed out from condenser 52 passes through the first refrigerant piping 55, and flows into the inflow entrance A of cold-producing medium transfer valve 60, flows out as shown in flow of refrigerant L1 from connected entrance B.And, pass through in second refrigerant pipe arrangement 56 and flow into prevent condense pipe arrangement 17.

Flow into the temperature of the cold-producing medium preventing condensation pipe arrangement 17 (namely, temperature from the cold-producing medium that condenser 52 flows out) higher than the temperature of case outer air, thus inflow prevents the opening circumference 1H2 (with reference to Fig. 2, Fig. 3) of the cold-producing medium of condensation pipe arrangement 17 to refrigerator main body 1H from heating.Thus, the temperature of the opening circumference 1H2 of refrigerator main body 1H rises, and dew-point temperature rises, thus suppresses condensation.

And, to dispel the heat and temperature becomes and flows out from preventing condensation pipe arrangement 17 than low cold-producing medium when flowing into the pipe arrangement 17 that prevents from condensing to opening circumference 1H2, and via the downstream of second refrigerant pipe arrangement 56, the connected entrance D to cold-producing medium transfer valve 60 flows into.And cold-producing medium flows out from connected entrance C as shown in flow of refrigerant L2, and via the 3rd refrigerant piping 57, in the decompressing unit 54 as tubule by afterwards, adiabatic expansion and become low-temp low-pressure.

Cold-producing medium after decompressing unit 54 is passed through flows into the cooler 7 (cooler pipe arrangement 7d) (with reference to Fig. 4) as evaporimeter.The cold-producing medium flowing into the low temperature of cooler 7 (cooler pipe arrangement 7d) carries out heat exchange with surrounding air and evaporates in cooler 7, and returns compressor 51.

Like this, in first mode (preventing condensation pattern), due to higher than the external air temperature arranging refrigerator main body 1H in the refrigerant temperature preventing condensation pipe arrangement 17 from passing through, even if so when extraneous air is hot and humid, the temperature of the opening circumference 1H2 of refrigerator main body 1H also rises, and can suppress the condensation of the opening circumference 1H2 of refrigerator main body 1H.

(second pattern of Fig. 6) bypass mode

As shown in Figure 6, in the second pattern (bypass mode), the inflow entrance A of cold-producing medium transfer valve 60 is communicated with (flow of refrigerant L3) with connected entrance C, and connected entrance B and connected entrance D is not communicated with other.

The cold-producing medium of the HTHP after being compressed by compressor 51 flows into condenser 52, carries out heat exchange thus cools in condenser 52 with air (case outer air).The cold-producing medium flowed out from condenser 52 passes through the first refrigerant piping 55, inflow entrance A to cold-producing medium transfer valve 60 flows into, as shown in flow of refrigerant L3, flow out from connected entrance C, pass through in the 3rd refrigerant piping 57, and in the decompressing unit 54 as tubule by afterwards, adiabatic expansion and become low-temp low-pressure, flows into the cooler 7 (cooler pipe arrangement 7d) as evaporimeter.The cold-producing medium of the low temperature flowed into cooler 7 (cooler pipe arrangement 7d) (with reference to Fig. 2) carries out heat exchange with surrounding air and evaporates in cooler 7, and returns compressor 51.

If (prevent condensation pattern) in a first pattern, (with reference to Fig. 5) operates, the cold-producing medium that then temperature is higher than the temperature of extraneous air flows to preventing condensation pipe arrangement 17, thus has the possibility being heated storeroom (ice-making compartment 3, upper strata refrigerating chamber 4, lower floor's refrigerating chamber 5) (with reference to Fig. 3) etc. by this heat.Therefore, when extraneous air be the possibility of the condensation such as low humidity lower, (bypass mode) running in a second mode, thus not to preventing condensation pipe arrangement 17 flow system cryogen.

Thus, although when there is no the effect preventing condensing of the opening circumference 1H2 of refrigerator main body 1H but the possibility of condensation is lower, heat can be prevented from preventing condensation pipe arrangement 17 to refrigerator main body 1H internal leakage, thus the energy-efficient performance of refrigerator 1 can be improved.

The first mode (preventing condensation pattern) of cold-producing medium transfer valve 60 and the second pattern (bypass mode) based on the testing result of the external air temperature sensor 42 shown in Fig. 2, extraneous air humidity sensor 43 determine whether condensation may.

Such as, the humidity according to the extraneous air detected by extraneous air humidity sensor 43 obtains dew point, and whether obtain according to the external air temperature detected by external air temperature sensor 42 be the environment that can condense.Whether or the external air temperature according to being detected by external air temperature sensor 42 obtains saturated humidity, and to obtain according to the humidity of the extraneous air detected by extraneous air humidity sensor 43 be the environment that can condense.

And, if being set to first mode (preventing condensation pattern) when there is the possibility of condensation, being set to the mode switch mode of the second pattern (bypass mode) when there is not the possibility of condensation, then only can prevent condensation if desired what can condense, time in addition, can heat leak be suppressed when namely can not condense, thus effective in minimizing power consumption.

(the 3rd pattern of Fig. 7) stop mode

In the 3rd pattern (stop mode) shown in Fig. 7, compressor 51 becomes the state of stopping, and the connected entrance C of cold-producing medium transfer valve 60 closes.

In 3rd pattern, by closing connected entrance C, cut off the loop that cold-producing medium circulates.Namely, by cutting off the connected entrance C of cold-producing medium transfer valve 60, the cold-producing medium cutting off temperature that the first refrigerant piping 55 or condenser 52, second refrigerant pipe arrangement 56 or cold-producing medium prevent from condensing in pipe arrangement 17 higher flows into the 3rd refrigerant piping 57 or cooler 7.Thereby, it is possible to prevent the temperature of cooler 7 from rising.

Herein, refrigerator 1 is when carrying out the running of cold storage room (2,3,4,5,6) by freeze cycle, make compressor 51 action until storeroom becomes below set point of temperature, if storeroom is reduced to below the set point of temperature that set, compressor 51 is stopped.And, if the set point of temperature that storeroom rises to than having set is high, then restarts compressor 51 and come cold storage room.

When the stopping of compressor 51, by cold-producing medium transfer valve 60 being set to the 3rd pattern (stop mode), the cold-producing medium in cooler 7 can be maintained with low temperature.Therefore, when the restarting of compressor 51, the cold-producing medium in cooler 7 is low temperature, thus is in the higher state of heat exchanger effectiveness, and then can improve the energy-efficient performance of refrigerator 1.

(four-mode of Fig. 8) refrigerant-recovery pattern

As shown in Figure 8, in four-mode (refrigerant-recovery pattern), the inflow entrance A of cold-producing medium transfer valve 60 closes with connected entrance D and is not communicated with other, and connected entrance B and connected entrance C is interconnected, and cold-producing medium flows as flow of refrigerant L4.

Because inflow entrance A is not all communicated with any one connected entrance B, C, D, even if so make compressor 51 operate, cold-producing medium does not also flow, and is communicated with and becomes the state of high pressure than condenser 52, first refrigerant piping 55 of the high-pressure side outlet 51o downstream of compressor 51 with the high-pressure side outlet 51o of compressor 51.

On the other hand, because connected entrance B and connected entrance C is interconnected, so second refrigerant pipe arrangement 56 is communicated with the 3rd refrigerant piping 57.And, because connected entrance D closes, even if so make compressor 51 operate, cold-producing medium does not also flow, than the second refrigerant pipe arrangement 56 and preventing of connected entrance D downstream condense pipe arrangement 17, be connected to from the downstream of connected entrance C the suction side of compressor 51 the 3rd refrigerant piping 57, as the running because of compressor 51 of the decompressing unit 54 of tubule and cooler 7, and become the state of the low pressure equal with the low-pressure side suction inlet 51i of compressor 51.

That is, if make compressor 51 operate with four-mode (refrigerant-recovery pattern), then the low pressure of the low-pressure side suction inlet 51i of compressor 51 can be utilized second refrigerant pipe arrangement 56 and prevent the cold-producing medium condensed in pipe arrangement 17 to be attracted in cooler 7.And, when the restarting of compressor 51, the state becoming second refrigerant pipe arrangement 56 and prevent the refrigerant amount that condenses in pipe arrangement 17 less, on the other hand, in cooler 7, there is cold-producing medium fully and become the higher state of heat exchanger effectiveness, thus the energy-efficient performance of refrigerator 1 can be improved.

More than the refrigerant loop of refrigerator 1 and the operation mode of the first ~ the four-mode.

" cold-producing medium transfer valve 60 " (configuration of connected entrance B, C, D)

Next, Fig. 9 to Figure 16 is used to be described the structure of the cold-producing medium transfer valve 60 of the first embodiment and action.

Fig. 9 is the stereogram of the outward appearance of the cold-producing medium transfer valve 60 representing the first embodiment.Figure 10 is the G direction direction view of Fig. 9.Figure 11 is the F-F sectional view of Figure 10.Figure 12 is the stereogram of the internal structure representing cold-producing medium transfer valve 60, and being hypothesis takes off stator case 61 and valve chest 66 from cold-producing medium transfer valve 60 and carry out the stereogram had an X-rayed.Figure 13 is the stereogram of the structure representing rotor pinion 75, idler gear 79 and spool 80, represents the structure of the transfer unit of the driving force employed from the gear till rotor 70 to spool 80.

As shown in Fig. 9, Figure 11, in the inside of the stator case 61 of the exterior substantially cylindrical shape of formation cold-producing medium transfer valve 60, be formed with the stator 62 of the substantially cylindrical shape as fixture of the motor being wound with coil.In addition, in a part for stator case 61, be formed with the connector shell 63 given prominence to laterally with convex form, be provided with connector 65 in connector shell 63, this connector 65 has the connector pin 64 wiring of the coil from stator 62 be connected with outside drive circuit.

Cold-producing medium transfer valve 60 the valve chest 66 that spool 80 covers such as is integrally formed by deep drawing processing etc. by nonmagnetic material metals such as stainless steels, be formed as upper end close and the diameter of lower ending opening, lower end side larger than the diameter of upper end side have round-ended cylinder shape, the lower end of opening is expanded as flange shape.

As shown in figure 11, the upside of valve chest 66 is chimeric with the inner peripheral portion of stator 62, and on the other hand, the downside of valve chest 66 becomes the openend that its diameter expands than upside.In this openend, chimeric discoid seat board 67, and by welding, sealed engagement is carried out to complete cycle.

As shown in Figure 10 to Figure 12, seat board 67 is made up of three parts of the different concentric circles of mutual thickness, has integratedly: the first seat board portion 67a forming the disc-shape of a part for seat board 67; With the first seat board portion 67a phase diameter group is little and thickness is thick, uniaxially protrudes and the second seat board portion 67b of the disc-shape at the center of interior bag first seat board portion 67a to communicating pipe 69 side; And thickness is thin and form the 3rd seat board portion (the peripheral valve seat plate portion) 67c of the exterior contour of the most peripheral of seat board 67 compared with the first seat board portion 67a.In addition, polished surface 90 is preferably ground in the face of the side abutted with spool 80 of seat board 67.The details of the structure of aftermentioned seat board 67.

As shown in Figure 11 to Figure 12, on the first seat board portion 67a, an inflow pipe 68 to pass through mode and its combination of solder brazing seal joints, and is communicated with the inside of valve chest 66.

As shown in Figure 10 to Figure 12, on the second the thickest seat board portion 67b, three communicating pipe 69 that is communicating pipe 69b, communicating pipe 69c and communicating pipe 69d to pass through mode and its combination of solder brazing seal joints, and are communicated with the inside of valve chest 66.And as shown in figs.10 and 11, one end of inflow pipe 68 and communicating pipe 69b, communicating pipe 69c, communicating pipe 69d is connected with towards inflow entrance A, the connected entrance B of side opening in valve chest 66, connected entrance C, connected entrance D in seat board 67 face respectively.

Rotor 70 shown in Figure 11 is revolving parts of the motor with magnet.If connector pin 64 is connected to drive circuit (not shown) and coil electricity to stator 62, then produce magnetic field at stator 62, the magnet via valve chest 66 pairs of rotors 70 applies magnetic field, and rotor 70 rotates around poppet shaft 71.An example of the structure of this motor is general stepper motor, rotates by constant angle, but omits detailed description.

Poppet shaft 71 is rotary middle spindles of rotor 70, and becomes the axle of the center of rotation of spool 80 described later.

The first seat board portion 67a or the second seat board portion 67b substantial middle, be preferably center, be formed with the rotor shaft hatch 72 as the embedded hole of poppet shaft 71, this rotor shaft hatch 72 be not through second seat board portion 67b have bottom outlet.And the first seat board portion 67a and the second seat board portion 67b configures in the mode coaxial with rotor shaft hatch 72.

As shown in figure 11, there is the substantial middle of bottom at the cylinder on valve chest 66 top, be formed with the rotor bearing 73 as recess.One end of poppet shaft 71 is chimeric and be supported on rotor shaft hatch 72, and the other end is chimeric with rotor bearing 73 and supported.

Poppet shaft 71 is pressed into fixed the rotor shaft hatch 72 in the end being located at seat board 67, and loosely inlaid be assembled in the other end rotor bearing 73 with closing.That is, the rotor shaft hatch 72 of an end has the diameter slightly less than the diameter of poppet shaft 71, and the rotor bearing 73 of the other end has the diameter slightly larger than the diameter of poppet shaft 71.

But, because poppet shaft 71 is to be pressed into fixed without the mode becoming to be integrated with rocking with rotor shaft hatch 72, even if so the precision of the axiality of rotor shaft hatch 72 and rotor bearing 73 is not high, poppet shaft 71 also can be made to erect well relative to seat board 67 vertical precision.Thus, the axiality of seat board 67 and valve chest 66, valve chest 66 and rotor 70 and rotor 70 and stator 62 is improved.Therefore, motor performance is improved.

(the inflow entrance A of cold-producing medium transfer valve 60, the position of connected entrance B, C, D)

As shown in Figure 10, be configured on the identical circle centered by poppet shaft 71 (rotor shaft hatch 72) at connected entrance B, the connected entrance C of the lower surface opening of cold-producing medium transfer valve 60 and connected entrance D.

The best configuration angle of connected entrance B, connected entrance C and connected entrance D is below described in detail in detail.

In this first embodiment, connected entrance D is arranged on relative to the position of poppet shaft 71 (rotor shaft hatch 72) close to inflow entrance A.Connected entrance B is arranged on the side contrary with connected entrance B across poppet shaft 71 (rotor shaft hatch 72).

Connected entrance C has in the side of poppet shaft 71 (rotor shaft hatch 72), mutually roughly in 90 ° with connected entrance B and connected entrance D relation, and is arranged on the neighbouring position of pony axle 78.

In addition, if the position of connected entrance B, connected entrance C and connected entrance D meets the mutual configuration relation around poppet shaft 71, then inflow entrance A or pony axle 78 are not limited to the position relationship of this example.

As shown in Figure 10, Figure 12, on the first seat board portion 67a, relative to the side of poppet shaft 71 (rotor shaft hatch 72) close to connected entrance C, be formed with the embedded hole 78a of the pony axle 78 of the pivot as idler gear 79 described later.At embedded hole 78a, in the mode by solder brazing seal joints, one end of pony axle 78 is incorporated into the first seat board portion 67a.

As shown in Figure 11, Figure 12, Figure 13, the other end of pony axle 78 is not fixed, and pony axle 78 is structures of so-called cantilever support.

Rotor 70 is supported on rotor drive division 74 integratedly, and with poppet shaft 71 for rotary middle spindle, thus rotor 70 and rotor drive division 74 rotate integratedly.As shown in figure 12, rotor pinion 75 is formed with in the bottom of rotor drive division 74.That is, if rotor 70 rotates, then rotor drive division 74 and rotor pinion 75 rotate integratedly.

(the spool sliding contact surface 81 of spool 80)

Spool 80, while be spool sliding contact surface 81 (with reference to Figure 13) with one side and connect with the grinding polished surface 90 of seat board 67, rotates centered by poppet shaft 71.

By making spool 80 rotate, become the structure of connected entrance B, C, D of being located at seat board 67 (with reference to Figure 10) being carried out to opening and closing.

In addition, at the spool sliding contact surface 81 (with reference to Figure 13) as the face connected with seat board 67 of spool 80, be provided with the connection recess 82 (with reference to Figure 13) as recess partly, as described later, this connection recess 82 can select two connected entrances be communicated with.In addition, the relation being communicated with the position of recess 82 and the on-off action of connected entrance B, C, D will in hereinafter describing.In addition, valve core gear 83 is provided with in the periphery of the side away from seat board 67 (with reference to Figure 11) of spool 80.

(relation of rotor pinion 75 and spool 80)

For the rotor pinion 75 be integrally formed with rotor drive division 74, the rotor drive division front end 76 as protuberance arranged around the rotating shaft of the bottom of rotor pinion 75 is placed in the upper surface of spool 80.And rotor pinion 75 and spool 80 are configured to the poppet shaft 71 that can make as common central shaft via rotor drive shaft hole 77 and spool axis hole 85 respectively and rotate freely.

(pressing of spool 80)

As shown in Figure 11, Figure 12, leaf spring 86 is forcing unit of part extension arm radially inside the upper surface of valve chest 66, and this leaf spring 86 is configured in supporting rotor 70 and above the rotor drive division 74 rotated integrally with it.

As shown in figure 12, the reaction force in poppet shaft 71 direction be subject to inside the upper surface from valve chest 66 via rotor drive division 74, rotor pinion 75 and put on spool 80, thus is pressed spool 80 relative to seat board 67 by the arm of leaf spring 86.Further, spool 80 is also applied in the lump to the deadweight of rotor 70.

Herein, as shown in figure 13, due near the position poppet shaft 71 that rotor drive division front end 76 contacts with spool 80, so spool 80 is pressed relative to seat board 67 vertically near vicinity, the i.e. pivot of rotating shaft (poppet shaft 71), thus evenly and balance be pressed well.

(idler gear 79)

As shown in Figure 11, Figure 12, at pony axle 78, the earth's axis can be rotated freely and be supported with the idler gear 79 with idle running gear wheel 79b and loose pinion 79a.Idle running gear wheel 79b engages with rotor pinion 75, and loose pinion 79a engages with valve core gear 83, thus slows down.From the torque of rotor 70 while slow down while transmit according to the order of rotor pinion 75, idle running gear wheel 79b, loose pinion 79a, valve core gear 83.In addition, the torque from rotor 70 correspondingly becomes large with the amount being decelerated to valve core gear 83.

Herein, when the number of teeth of rotor pinion 75 being set to Z1, the number of teeth of idle running gear wheel 79b is set to Z2, the number of teeth of loose pinion 79a is set to Z3, when the number of teeth of valve core gear 83 is set to Z4, if the module of whole gears is identical, and meet the relation of Z1+Z2=Z3+Z4, axle base then between rotor pinion 75 with idle running gear wheel 79b is equal with the axle base between loose pinion 79a with valve core gear 83, thus can arranged coaxial rotor pinion 75 and valve core gear 83.Such as, as Z1=12, Z2=34, Z3=13, Z4=33, Z1+Z2=Z3+Z4=46, thus this relation can be met.

And the speed reducing ratio from rotor 70 to spool 80 is now (Z1 × Z3)/(Z2 × Z4), in above-mentioned example be (12 × 13)/(34 × 33)=about 1/7.2.

According to (torque) × (speed reducing ratio)=this relation constant, spool 80 rotates with the moment of torsion of 7.2 of the moment of torsion produced by rotor 70 times.Therefore, the torque of spool 80 has enough and to spare, reliably can drive the switching action of spool 80.

The best configuration > of < inflow pipe 68, second seat board portion 67b or spool 80, pony axle 78 or idler gear 79

Next, use Figure 10 ~ Figure 12, the best configuration relation of inflow pipe 68, second seat board portion 67b or spool 80, pony axle 78 or idler gear 79 is described.

As shown in Figure 10 ~ Figure 12, inflow pipe 68 is communicated with the inside of valve chest 66, sprays cold-producing medium from inflow entrance A at high speed in valve chest 66.When cold-producing medium is flow in valve chest 66 by inflow pipe 68, flow path area expands and flow velocity reduces, and flows out from any one flow export B, C, D that the switching state with spool 80 opens wide accordingly to communicating pipe 69.

Herein, if the fluid force produced because of the cold-producing medium sprayed from the inflow entrance A be connected with inflow pipe 68 acts on idler gear 79, then idler gear 79 floats, to vibrate and to spool 80 active force engaged with idler gear 79, thus has the possibility that spool 80 changes relative to the pressing force of the second seat board portion 67b, reduces relative to the sealing of the second seat board portion 67b.

Therefore, in this first embodiment, relative to the spool 80 of poppet shaft 71 arranged coaxial of the central shaft with valve chest 66, be provided with inflow entrance A (inflow pipe 68) at the opposite side across flow export D, near flow export C, be provided with pony axle 78 and idler gear 79.

Or be not limited to this first embodiment, also can be configured to, inflow entrance A (inflow pipe 68) is set in side relative to spool 80, pony axle 78 and idler gear 79 are set at the opposite side across spool 80.

By this configuration, owing to not configuring idler gear 79 near inflow entrance A, so idler gear 79 can not be subject to the fluid force that the cold-producing medium because flowing in valve chest 66 causes, thus the situation that idler gear 79 floats or vibrate can not be produced.Therefore, spool 80 can not change relative to the pressing force of seat board 67, thus obtains the stable sealing relative to seat board 67, and obtains the high cold-producing medium transfer valve 60 of reliability.

(block 84 of spool 80)

In addition, as shown in figure 13, a part for spool 80 is formed as the block 84 of the convex form protruded than the periphery of valve core gear 83.By this structure, when spool 80 is clockwise or when being rotated counterclockwise maximum angle, the idle running block 79c of the cylindrical shape of giving prominence to than the downward side of loose pinion 79a of the block 84 of convex form and idler gear 79 abuts, and the anglec of rotation of valve core gear 83 is restricted to the angular range of regulation.

In addition, in order to ensure the scope of the rotational angle needed, the anglec of rotation of valve core gear 83 is configured to, and on the basis of the scope of the rotational angle required for the switching action of spool 80 described later, abuts and stop operating after the angle of the angle such as about 8 ° of many rotation regulations.

(cantilevered coming off of idler gear 79 prevents)

As shown in figure 12, at idler gear 79, and be formed with circle-shaped jut 79s at the upper surface of idle running gear wheel 79b.In addition, as shown in figure 11, at rotor drive division 74, jut 74s is circumferentially formed.The pony axle 78 of idler gear 79 is cantilevered structures, but when staggering upward in the position of the axis of idler gear 79, the jut 79s of idler gear 79 abuts with the jut 74s of rotor drive division 74 and cannot continue mobile.Thus, prevent idler gear 79 from coming off from cantilevered pony axle 78.

The action > of < cold-producing medium transfer valve 60

Next, the on-off action of Figure 14 ~ Figure 16 to spool 80 couples of connected entrances B, C, D is used to be described.

As the configuration of connected entrance B, C, D of seat board 67, three apex configuration connected entrances in the square 91 of supposition, by spool 80 opening and closing connected entrance B, C, D, that the easiness etc. that controls of the rotation of spool 80 is seen is more suitable.

Figure 14 is the figure of the position relationship of connected entrance B, C, the D of spool sliding contact surface 81, first embodiment that the spool 80 observed from the arrow G direction of Fig. 9 is described.In addition, in Figure 14 ~ Figure 16, in order to easy understand, hatching is added to the spool sliding contact surface 81 connected with seat board 67 and illustrates.

(the rotation spacing of spool 80)

To each other, formed by the center line connecting each connected entrance B, C, D and poppet shaft 71, angle is 90 ° for adjacent connected entrance B, C, D.

Herein, connected entrance B, connected entrance C and connected entrance D respectively with every 90 ° of adjacent configurations, from connected entrance B to the scope of the configuration of connected entrance D be 180 °.

If the spool sliding contact surface 81 of spool 80 to be also set to the scope of covering 180 °, then spool 80 can cover connected entrance B, C, D simultaneously.In present embodiment, in addition, at the spool sliding contact surface 81 of spool 80, arrange in the mode of the scope being only communicated with 90 ° and be communicated with recess 82, and configure in the mode be communicated with between connected entrance B with connected entrance C and be communicated with recess 82.That is, connected entrance B, C be communicated with recess 82 and be communicated with, connected entrance D becomes the state covered by spool sliding contact surface 81.

Spool 80, counterclockwise rotates from angle 0 for angle 0 with the state shown in Figure 14 in present embodiment.

Rotate 270 ° counterclockwise in the present embodiment, often rotate 90 ° to all directions, the open and-shut mode of connected entrance B, C, D changes.

The open and-shut mode of above-mentioned connected entrance B, C, D is described by Figure 15.

Figure 15 is the key diagram representing the configuration of connected entrance, the rotation of spool and open and-shut mode, illustrates identically with Figure 17.

Illustrate in Figure 15, the spool sliding contact surface 81 of spool 80 around poppet shaft 71 counterclockwise

(1) be the first state that is identical with Figure 14, angle=0,

(2) be the second state after rotation 90 °,

(3) be the third state after rotation 180 °,

(4) be the 4th state after rotation 270 °.

Spool 80 is configured to the 4th state that can turn to (4) from first state of (1), and reversibly can the first state from the 4th state of (4) to (1) rotate.

Figure 16 be illustrate first state of cold-producing medium transfer valve 60 and Figure 15 (1) to (4) the 4th state accordingly the every 90 ° of ground of spool 80 rotate successively after the schematic diagram of refrigerant loop.In Figure 16, connected entrance B and connected entrance D connects the two ends of second refrigerant pipe arrangement 56, prevents condensation pipe arrangement 17 to be arranged between connected entrance B and connected entrance D.Connected entrance C is connected with the 3rd refrigerant piping 57.

Herein, as shown in Figure 9, at inflow entrance A, the inflow pipe 68 be connected with the first refrigerant piping 55 is fixed with.

At connected entrance B, be fixed with the communicating pipe 69b be connected with one end of second refrigerant pipe arrangement 56.

At connected entrance C, be fixed with the communicating pipe 69c be connected with the 3rd refrigerant piping 57.

At connected entrance D, be fixed with the communicating pipe 69d be connected with the other end of second refrigerant pipe arrangement 56.

< refrigerant-recovery pattern >

First state of Figure 16 (1) is the four-mode shown in Fig. 8, is refrigerant-recovery pattern.

In first state (refrigerant-recovery pattern) of Figure 16 (1), connected entrance B is interconnected by being communicated with recess 82 with connected entrance C, and connected entrance D is closed by spool sliding contact surface 81.

Because connected entrance B, connected entrance C and connected entrance D are all covered by spool 80, so the cold-producing medium flowed in valve chest 66 from inflow entrance A is not from any one flowing to connected entrance B, connected entrance C and connected entrance D in valve chest 66.Therefore, be the state that cold-producing medium cannot flow out from any one connected entrance B, C, D, inflow entrance A closes flowed in valve chest 66 from inflow entrance A.

On the other hand, second refrigerant pipe arrangement 56 is interconnected by being communicated with recess 82 with connected entrance C with the connected entrance B of the 3rd refrigerant piping 57.Therefore, if make compressor 51 operate in this condition, then than second refrigerant pipe arrangement 56 and the pipe arrangement 17 that prevents from condensing of connected entrance D downstream, the 3rd refrigerant piping 57 is connected with the suction side of compressor 51 from the downstream of connected entrance C, become the state of the low pressure equal with the low-pressure side suction inlet 51i of compressor 51 as the decompressing unit 54 of tubule, cooler 7, thus in cooler 7, reclaim cold-producing medium from pipe arrangement 17 grade that prevents condensing.

< stop mode >

Second state of Figure 16 (2) is the 3rd pattern shown in Fig. 7, is the stop mode that compressor 51 stops.

Under second state of Figure 16 (2), inflow entrance A is communicated with via the inner space of valve chest 66 with connected entrance D, and connected entrance C, B close.In this situation, compressor 51 stops, and cold-producing medium does not flow.

< bypass mode >

The third state of Figure 16 (3) is the second pattern shown in Fig. 6, is that cold-producing medium is not to the bypass mode preventing condensation pipe arrangement 17 from flowing.

Under the third state of Figure 16 (3), connected entrance B and connected entrance D closes.

Because the two ends of the second refrigerant pipe arrangement 56 be connected with connected entrance B, D are closed, so compressed by compressor 51 and flow to connected entrance C via in valve chest 66 via the cold-producing medium that condenser 52 flows into from the inflow entrance A of cold-producing medium transfer valve 60.And, cold-producing medium from connected entrance C via the 3rd refrigerant piping 57 after the decompressing unit 54 as tubule is passed through, adiabatic expansion and become low-temp low-pressure, flows into cooler 7.Compressor 51 is returned after the cold-producing medium of the low temperature of inflow cooler 7 (cooler pipe arrangement 7d) and surrounding air carry out heat exchange.

< prevents condensation pattern >

4th state of Figure 16 (4) is the first mode shown in Fig. 5, is that cold-producing medium is to preventing the normal mode of condensation pipe arrangement 17 flowing that is preventing condensation pattern.

Under 4th state of Figure 16 (4), connected entrance B opening, connected entrance C and connected entrance D is interconnected at connection recess 82 opening.Compressed by compressor 51 and flow out to second refrigerant pipe arrangement 56 from connected entrance B via in valve chest 66 (with reference to Figure 11) via the cold-producing medium that condenser 52 flows into from the inflow entrance A of cold-producing medium transfer valve 60.

Cold-producing medium flows into from connected entrance D to connection recess 82 via preventing condensation pipe arrangement 17, flows out and passes through in the decompressing unit 54 as tubule via the 3rd refrigerant piping 57, afterwards adiabatic expansion and become low-temp low-pressure, flow into cooler 7 from connected entrance C.The cold-producing medium and the surrounding air that flow into the low temperature of cooler 7 (cooler pipe arrangement 7d) are carried out heat exchange and return compressor 51.

Herein, to possessing refrigerant-recovery pattern, stop mode, bypass mode in the mode that can switch and preventing the mode of four patterns such as condensation pattern to be illustrated in present embodiment, but also can not use refrigerant-recovery pattern, but possess stop mode, bypass mode in the mode that can switch and prevent the mode of three patterns such as condensation pattern.Like this possess in the embodiment of three patterns, by to make spool 80 only can rotate the mode of 180 ° of (2) in Figure 15 and Figure 16 second state to (4) the 4th states, block 84 is set in the position of the anglec of rotation of restriction spool 80, can realizes.

In addition, if the size of the angle centered by poppet shaft 71 of connected entrance B, C, D, connection recess 82 can realize above-mentioned four patterns, be not particularly limited, be not necessarily defined in above-mentioned position relationship.

" valve seat structure "

Next, Figure 17 to Figure 22 is used to be described the valve seat structure of the cold-producing medium transfer valve 60 of the first embodiment further.

Figure 17 is the amplification partial sectional view representing the second seat board portion 67b of cold-producing medium transfer valve 60, spool 80 and the section of communicating pipe 69.

Figure 18 is the amplification partial sectional view of the F-F section represented in Figure 10 of the seat board 67 of cold-producing medium transfer valve 60, communicating pipe 69, inflow pipe 68 and pony axle 78.Figure 19 is that hypothesis represents the exploded perspective view being pressed into the state of poppet shaft 71 at seat board 67.Figure 20 is the amplification partial sectional view of the section shape representing the first seat board portion 67a and inflow pipe 68.Figure 21 is the sectional view identical with Figure 18 of the shape after the one side representing grinding valve seat board.Figure 22 is the amplification partial sectional view of the section representing the 3rd seat board portion 67c and valve chest 66.

As shown in figure 17, the diameter of the second seat board portion 67b is less than the diameter of the first seat board portion 67a of periphery, and one with one heart, and is provided with ladder.

In the central authorities of the second seat board portion 67b, be equipped with not through rotor shaft hatch with the end 72 from the side of configuration spool 80, be pressed into and fixed bearing poppet shaft 71.In addition, with rotor shaft hatch 72 adjacently opening have the intercommunicating pore 88 (being communicated with pore 87) be connected respectively with communicating pipe 69 (69b, 69c, 69d).In addition, Tu17Zhong, represents and in three intercommunicating pores 88 (being communicated with pore 87) be connected respectively communicating pipe 69 (69b, 69c, 69d).

Herein, for intercommunicating pore 88, connection pore 87, (such as, a side opening of configuration spool 80 has diameter d 0 left and right) intercommunicating pore 88, the connection pore 87 of opposition side of the side of configuration spool 80 expands as diameter d 1 (d1 > d0).In the part of the diameter d 1 of connection pore 87, be fitted together to and solder brazing ground engageable communication pipe 69.

The intercommunicating pore 88 that above-mentioned communicating pipe 69 connects, connection pore 87 are configured to, can be overlapping with the connection recess 82 being located at spool sliding contact surface 81 by the rotation of spool 80.

On the other hand, generally use copper pipe as refrigerant piping communicating pipe 69, be fitted together to and (such as, the connection pore 87 of solder brazing communicating pipe 69 has the diameter d 1 thicker than the internal diameter of intercommunicating pore 88 left and right), during solder brazing, in order to position relative to the second seat board portion 67b, need the degree of depth t2 (such as, about 2mm) of certain degree.

Herein, when the thickness of the second seat board portion 67b being set to t0, the degree of depth of rotor shaft hatch 72 with the end is set to t1, when the degree of depth of chimeric communicating pipe 69b, communicating pipe 69c, communicating pipe 69d is set to t2, if meet the relation of t0 > (t1+t2), then rotor shaft hatch 72 be communicated with pore 87 and interfere and not open holes.Therefore, when carrying out solder brazing to communicating pipe 69, do not flow into solder flux to rotor shaft hatch 72, thus suitable.This can such as realize as t0=5mm, t1=t2=2mm.

As shown in figure 17, be communicated with the interference of pore 87 and rotor shaft hatch 72 not overlapping further suppression when grinding polished surface 90 is observed in front, thus preferably.

By rotor shaft hatch 72 being arranged at the second seat board portion 67b with thickness, can much deeper be pressed into poppet shaft 71, thus preferably.

Next, Figure 17, Figure 19 suitable structure to seat board 67 and poppet shaft 71 is used to be described.

Because poppet shaft 71 is pressed into rotor shaft hatch 72 with the end until degree of depth t1 and being fitted and fixed with, do not carry out solder brazing, so have following effect, namely, solder flux does not invade to the junction surface of poppet shaft 71 and the second seat board portion 67b, solder flux can not stretch out in bight tab-like because of surface tension, and can not hinder being close to of spool 80 and the second seat board portion 67b because of the solder flux stretched out.Further, when by solder brazing fixed axis, between axle and axis hole, the gap of such as about the 0.05 ~ 0.1mm for flowing into solder flux is needed, so produce the error of perpendicularity between axle and axis hole because of this gap.That is, even if carried out perforate processing with higher perpendicularity to rotor shaft hatch 72 with the sliding contact surface of spool 80 relative to the second seat board portion 67b, the perpendicularity after the solder brazing of poppet shaft 71 is also poor than the perpendicularity of perforate processing.

On the other hand, in present embodiment, because poppet shaft 71 is pressed into rotor shaft hatch 72, so have following effect, namely, poppet shaft 71 can not produce dislocation relative to rotor shaft hatch 72, and poppet shaft 71 obtains the precision equal with the perforate machining accuracy of rotor shaft hatch 72, thus poppet shaft 71 is free from errors fixed relative to seat board 67 and obtains higher vertical precision.

Next, by Figure 17, the suitable size of connectivity slot 82 is described.

Under (1) first state of the first embodiment shown in Figure 15, (4) the 4th states, cold-producing medium passes through at connection recess 82 and flows.

Herein, as the section size being communicated with recess 82, preferably the width w of the connection recess 82 shown in Figure 17 is set to the value equal with the diameter d 0 of cardinal principle intercommunicating pore 88 or the value slightly larger than the diameter d 0 of cardinal principle intercommunicating pore 88, the degree of depth h of the connection recess 82 shown in Figure 17 is set to the size roughly equal with w.

By being set to such size, there is following effect, that is, when cold-producing medium flows into connection recess 82 from connected entrance B, C, D, flow path area can be suppressed sharply to expand and the pressure loss that causes.

As shown in Figure 18 and Figure 19, the first seat board portion 67a setting that inflow pipe 68 or inflow pore 89 possess middle thickness t4 in seat board 67 is suitable.That is, although inflow pipe 68 does not need higher vertical precision with the position relationship flowing into pore 89, in order to ensure the intensity after solder brazing, the first seat board portion 67a is not preferably the thin-walled of degree as the 3rd seat board portion 67c of periphery.

On the other hand, in order to make the solder flux of melting reliably enter into inflow pipe 68 and flow between pore 89, the first seat board portion 67a is not preferably thicker the thickest portion as arranged communicating pipe 69 that is the second seat board portion 67b.Further, because inflow pipe 68 and the gap flowing into pore 89 mostly are 0.05 ~ 0.1mm most, so when flowing into pore 89 through inflow pipe 68, the not blocked up words assembleability of the first seat board portion 67a is good.Therefore, inflow pipe 68 or inflow pore 89 possess the first seat board portion 67a setting of middle thickness t4 in seat board 67 is optimum.

Next, by Figure 20, the relation of the inflow pore 89 and inflow pipe 68 that are arranged in the first seat board portion 67a is described.

Figure 20 represents figure inflow pipe 68 being carried out temporarily fixing, before solder brazing state by widening inflow pipe 68 front end after the inflow pore 89 that is arranged in the first seat board portion 67a, Figure 20 (a) is the J direction view of Figure 19, Figure 20 (b) is the K-K sectional view of Figure 20 (a), diagram top is that valve chest 66 is inner, and cold-producing medium is flowed into valve chest 66 inside from diagram below by inflow pipe 68.

Flow into the internal diameter 0.05 ~ 0.1mm larger than the external diameter of inflow pipe 68 of pore 89, be configured to produce gap.This gap is that the solder flux of the melting when solder brazing enters into inflow pipe 68 and flows between pore 89 required, if gap is too small, has solder flux to enter, cannot seal inflow pipe 68 and flow into the problems such as pore 89.

On the other hand, under the state before solder brazing, because inflow pipe 68 and inflow pore 89 are only chimeric states, so be the state producing gap, thus produce the problem of the dislocation of inflow pipe 68 when solder brazing.Therefore, preferably remain between inflow pipe 68 with inflow pore 89 and flow into the gap required for solder flux and the unswerving structure in front position that solder brazing terminates mutually crimping.

As an example of such structure, as shown in figure 20, after inflow pipe 68 is configured with the convex amount 97 of giving prominence to regulation from the first seat board portion 67a to the inside, two positions are set to those widened sections 94 and widen by the end face direction of arrow circumferentially along inflow pipe 68, make the end local deformation of inflow pipe 68, and by crimping with inside inflow pore 89 in the pressure contact portion 95 corresponding with those widened sections 94, thus the dislocation of inflow pipe 68 and the first seat board portion 67a can be prevented, and can inflow pipe 68 and flowing into guarantee between pore 89 solder flux flow into required for gap 96.

In present embodiment, illustrate the structure of two positions widening inflow pipe 68, but be not limited to and widen two positions and also can widen three positions, can inflow pipe 68 and flowing into guarantee between pore 89 solder flux flow into required for gap 96.

If widen two positions, the end face of the inner side of inflow pipe 68 becomes oval or Long Circle substantially, if widen three positions, becomes so-called " rice dumpling shape ".

In addition, be configured to solder flux because of surface tension also inflow pore 89 inside and between pressure contact portion 95 around.

(effect of the center configuration of spool 80)

Valve chest 66 shown in Fig. 9 to Figure 12 and being configured in the weld part 98 of most peripheral such as by TIG welding (tungsten, non-active gas weld), laser weld and sealing as the 3rd seat board portion 67c of the periphery of seat board 67.On the other hand, spool 80, idler gear 79 (with reference to Figure 11, Figure 13) are such as made by heat-resistant resins such as PPS (polyphenylene sulfide), but there is the limit for temperature rising.Particularly, even if having the thermal deformation producing trace also cannot seal the worry of cold-producing medium, so preferably suppress the structure that the temperature of spool 80 rises due to the spool sliding contact surface 81 of spool 80.

In the structure of the cold-producing medium transfer valve 60 of this first embodiment, spool 80 and rotor 70 arranged coaxial, and the structure being the poppet shaft 71 being configured to be set around the center of valve chest 66 and the center of seat board 67 is rotated.Therefore, as shown in figure 11, spool 80 is configured at from weld part 98 position farthest.

Thus, because the heat when welding is difficult to transmit and temperature is difficult to the center configuration spool 80 that rises most most, thus have can joint with seat board 67 of check valve housing 66 time the effect of thermal deformation of spool 80.

Further, as shown in Figure 18 or Figure 19, the 3rd seat board portion 67c as the periphery of seat board 67 is thinner than the first seat board portion 67a, and the thinnest in seat board 67, thickness is t3.When welded housing body 66 and the 3rd seat board portion 67c, the temperature of weld part needs the temperature rising to valve chest 66 and the 3rd seat board portion 67c melting, but must suppress inner spool 80, the temperature rising of idler gear 79.For this reason, the thickness of peripheral part of melting during preferred thinning welding, and make temperature increase fully with a small amount of heat, and the heat reducing that this heat conducts towards the inner circumferential of seat board 67.

For this reason, by the thickness t4 of the first seat board portion 67a be arranged between the thinnest thickness t3 of the 3rd seat board portion 67c of periphery and the second seat board portion 67b of the thickest thickness t0 of inner circumferential being set to the relation of t3 < t4 < t0, thus reliably weld with a small amount of heat melting as the 3rd seat board portion 67c of peripheral part and valve chest 66 peripheral part, and, by making, the Thickness Ratio second seat board portion 67b of the first seat board portion 67a is thin suppresses heat transfer, spool 80 can be suppressed, the temperature of idler gear 79 rises, from but suitable.

Next, by Figure 21 in seat board 67 and the details of surface configuration that slidingly contacts of the spool sliding contact surface 81 of spool 80 be described.Figure 21 is the sectional view only representing seat board 67 in the F-F sectional view shown in Figure 10.

The face illustrating top in face, i.e. Figure 11, Figure 12 and Figure 17 to Figure 19 of the side towards spool 80 of the first seat board portion 67a and the second seat board portion 67b is identical plane, and the second seat board portion 67b is the sliding surface being opened wide or close connected entrance B, connected entrance C, connected entrance D by the rotational action of spool 80, need higher plane precision, thus be grinding polished surface 90.

As shown in Figure 18 etc., be located at the second plate portion 67b, the one side opposed with being provided with the one side that is communicated with pore 87 be provided with the one side of grinding polished surface 90, the first plate portion 67a being communicated with the intercommunicating pore 88 that pore 87 is communicated with grinding polished surface 90 flatly continuous print mode arrange.3rd plate portion 67c with the face opposed with the one side of the first plate portion 67a flatly continuous print mode arrange.In addition, the 3rd plate portion 67c also can be arranged in the side of the one side opposed with the one side of the first plate portion 67a.

Grinding finishing operation is such as undertaken by the grinder that employs emery wheel, the polishing abrasive disk etc. that employs slimy grinding agent, but owing to grinding in polished surface 90, the crimp force of edge, periphery and emery wheel grinds more greatly and easily compared with central portion, thus produces so-called " turned-down edge ".Namely in the face of spool 80 side of seat board 67, as shown in figure 21, from the periphery of grinding polished surface 90, produce the turned-down edge of degree of depth s degree in the scope of e, such as e is about 1 ~ 2mm, s is about 5 ~ 10 μm.

Remove from periphery e scope inner side scope in, owing to not producing turned-down edge so obtain the higher face of surface accuracy.Herein, when the diameter of spool sliding contact surface 81 is set to d, by in the scope arranging diameter d from periphery than the abundant inner circumferential side of the scope of e, the impact of grinding caused turned-down edge can not had, spool sliding contact surface 81 and seat board 67 can be slidingly contacted seamless unoccupied place with higher precision, thus there is the effect of the leakage improving sealing and reduce cold-producing medium, the switching precision improving valve.

Next, by Figure 22, the suitable shape of the first seat board portion 67a, the 3rd seat board portion (peripheral valve seat plate portion) 67c and valve chest 66 is described.Figure 22 is the sectional view near the weld part 98 of the periphery representing seat board 67 and valve chest 66.

Be t4 and diameter is the first seat board portion 67a of D1 and the thickness of peripheral part is in the 3rd seat board portion (the peripheral valve seat plate portion) 67c of t3 at thickness, if configure the diagram lower surface of the first seat board portion 67a and the 3rd seat board portion 67c in the mode becoming identical faces, then between the diagram upper surface and the diagram upper surface of the 3rd seat board portion 67c of the first seat board portion 67a, produce ladder H.Herein, H=(t4-t3).

Valve chest 66 be formed as flange shape with the lower end of diameter D1 opening or chimb shape than D1 expand expansion section, its outer circumference diameter is identical or almost equal with the periphery of the 3rd seat board portion 67c.Seal and the weld part 98 engaged on the complete cycle of the boundary portion of the periphery of valve chest 66 and the periphery of the 3rd seat board portion 67c by welding.

During welding, must coaxial precision welded housing body 66 and seat board 67 well.Valve chest 66 is integrally formed by deep drawing processing etc., thus from the drum of diameter D1 flange shape the ridge line section of the inner circumferential of expansion section that expands become section shape with equal with the thickness of slab of valve chest 66 or slightly larger than thickness of slab bending R.

Therefore, the ladder H between the diagram upper surface of the first seat board portion 67a and the diagram upper surface of the 3rd seat board portion 67c is set to larger than the bending R of valve chest 66, i.e. H > R.In other words, in the height dimension of ladder H, there is the expansion section formed by bending R.Thus, the upper position of scope, the i.e. expansion section of (H-R) the diagram upper surface from the first seat board portion 67a, the inner circumferential of valve chest 66 and the periphery of the first seat board portion 67a are fitted together to mutually at the cylindrical portion place of diameter D1, thus can the coaxial precision inner circumferential of normal valve housing 66 and the periphery of the first seat board portion 67a well, also can guarantee higher axiality after welding, from but suitable.

< effect, effect >

1. cold-producing medium transfer valve 60 is by switching spool 80, improves the performance of handoffs of cold-producing medium.

As shown in Figure 14 ~ Figure 16, the cold-producing medium transfer valve 60 of the first embodiment is by switching spool 80, and any one is not all communicated with and communicating pipe 69b (connected entrance B) and communicating pipe 69c (connected entrance C) is interconnected and communicating pipe 69d (connected entrance D) first state (refrigerant-recovery pattern) of closing with communicating pipe 69b (connected entrance B), communicating pipe 69c (connected entrance C) and communicating pipe 69d (connected entrance D) can to switch the inflow pipe 68 (inflow entrance A) shown in following four state: Figure 16 (1); Inflow pipe 68 (inflow entrance A) shown in Figure 16 (2) is communicated with communicating pipe 69d (connected entrance D) and communicating pipe 69b (connected entrance B) and communicating pipe 69c (connected entrance C) second state (stop mode) of closing; Inflow pipe 68 (inflow entrance A) shown in Figure 16 (3) is communicated with communicating pipe 69c (connected entrance C) and communicating pipe 69b (connected entrance B) and communicating pipe 69d (connected entrance D) third state (bypass mode) of closing; Inflow pipe 68 (inflow entrance A) shown in Figure 16 (4) is communicated with communicating pipe 69b (connected entrance B) and the 4th state (preventing condensation pattern) that is interconnected of communicating pipe 69c (connected entrance C) and communicating pipe 69d (connected entrance D).

Thereby, it is possible to provide the cold-producing medium transfer valve 60 of the performance of handoffs that improve cold-producing medium.In addition, the switching of the cold-producing medium of the real use state meeting the equipment (refrigerator 1) possessing cold-producing medium transfer valve 60 can be carried out.

2. utilize cold-producing medium transfer valve 60 can the pattern of refrigerator 1 of switching device.

As passed through illustrated by Fig. 5 ~ Fig. 8 and Figure 14 ~ Figure 16, the equipment (refrigerator 1) possessing the cold-producing medium transfer valve 60 of the first embodiment can switch the pattern of following four refrigerant path (refrigerant loop) by the action of a cold-producing medium transfer valve 60: prevent the first mode (with reference to Fig. 5, Figure 16 (4)) condensed to preventing the condensation pipe arrangement 17 supplying temperature cold-producing medium higher than the temperature of extraneous air; Reduce the second pattern (with reference to Fig. 6, Figure 16 (3)) from the heat leak preventing condensation pipe arrangement 17; Maintain the 3rd pattern (with reference to Fig. 7, Figure 16 (2)) of the temperature of the cold-producing medium in cooler 7 with low temperature when stopping compressor 51; Reduce the four-mode (with reference to Fig. 8, Figure 16 (1)) preventing the refrigerant amount condensed in pipe arrangement 17.

Thus, the valve being located at the refrigerant path (refrigerant loop) of equipment (refrigerator 1) is only cold-producing medium transfer valve 60, can not add other valve and form freeze cycle, so can form at an easy rate.In addition, the switching of cold-producing medium transfer valve 60 controls, it is uncomplicated to configure, thus can improve the reliability of the equipment (refrigerator 1) possessing cold-producing medium transfer valve 60.

Or, also can not possess the four-mode reducing and prevent the refrigerant amount condensed in pipe arrangement 17, and be enough configured to only possess prevent from condensing first mode (with reference to Fig. 5, Figure 16 (4)), reducing second pattern (with reference to Fig. 6, Figure 16 (3)) of the heat leak from the pipe arrangement 17 that prevents from condensing, maintaining the 3rd pattern (with reference to Fig. 7, Figure 16 (2)) of the temperature of the cold-producing medium in cooler 7 when stopping compressor 51 with low temperature.

3. can carry out the switching preventing condensation pattern and bypass mode (not to the pattern preventing condensation pipe arrangement 17 flow system cryogen).

Possess the equipment (refrigerator 1) of cold-producing medium transfer valve 60 and the extraneous air humidity sensor 43 shown in Fig. 2, the measurement result of external air temperature sensor 42 accordingly, when extraneous air is hot and humid and there is the possibility of condensation, refrigerant path (refrigerant loop) can be switched to first mode (preventing condensation pattern) (with reference to Fig. 5, Figure 16 (4)), when extraneous air is low humidity and does not have the possibility condensed, refrigerant path (refrigerant loop) can be switched to the second pattern (bypass mode) (with reference to Fig. 6, Figure 16 (3)).In addition, as mentioned above, the switching of this pattern can be switched by the action of cold-producing medium transfer valve 60.

Thus, when exist condensation possibility, make the cold-producing medium of high temperature by prevent condense pipe arrangement 17, make the temperature of circumference 1H2 before the opening of storeroom (3,4,5) than storage compartment temperature high and improve dew point thus can prevent condensation.In addition, when there is no the possibility condensed, the cold-producing medium of the pipe arrangement 17 that makes to prevent to condense by stopping, the heat from the pipe arrangement 17 that prevents from condensing can be suppressed to leak to compartment interior and increase power consumption.Thus, there is energy-saving effect, thus can operating cost be reduced.

4. can the high speed of switching of implementation pattern.

First mode (preventing condensation pattern) (with reference to Fig. 5, Figure 16 (4)) and the second pattern (bypass mode) (with reference to Fig. 6, Figure 16 (3)) are by enabling the mutual half-twist of the anglec of rotation of spool 80 switch.Therefore, via preventing the first mode of condensation pipe arrangement 17 and can not carrying out with the extremely short time via the switching prevented between the second pattern of condensation pipe arrangement 17.

5. there is the effect preventing throttling from operating.

Herein, the problem points of following structure is described, namely, switching via the first mode (preventing condensation pattern) preventing condensation pipe arrangement 17 (with reference to Fig. 5, Figure 16 (4)) and not via preventing second pattern (bypass mode) of condensation pipe arrangement 17 (with reference to Fig. 6, Figure 16 (3)) time, for the time being via stopping the 3rd pattern (stop mode) of compressor 51 (with reference to Fig. 7, Figure 16 (2)) or reduce four-mode (refrigerant-recovery pattern) (the reference Fig. 8 preventing the refrigerant amount condensed in pipe arrangement 17, Figure 16 (1)) after switch.

In 3rd pattern (stop mode) and four-mode (refrigerant-recovery pattern), the inflow entrance A be communicated with the high-pressure side outlet 51o of the compressor 51 and connected entrance C be communicated with the low-pressure side suction inlet 51i of compressor 51 is not all communicated with, and refrigerant loop is all closed.Therefore, if make compressor 51 operate in this condition, then the pressure increase of high-pressure side outlet 51o, the pressure of low-pressure side suction inlet 51i reduces, but does not flow, so compressor 51 becomes the so-called throttle only dallied due to cold-producing medium.Make compressor 51 running can produce excessive pressure increase under such state, thus do not recommend.

Therefore, be configured to switching via the first mode (preventing condensation pattern) preventing condensation pipe arrangement 17 (with reference to Fig. 5, Figure 16 (4)) and get around the second pattern (bypass mode) (the reference Fig. 6 preventing condensation pipe arrangement 17, Figure 16 (3)) time for the time being via the 3rd pattern (stop mode) (with reference to Fig. 7, Figure 16 (2)) or four-mode (refrigerant-recovery pattern) (reference Fig. 8, Figure 16 (1)) when, now preferably stop compressor 51, but whenever switching first mode (preventing condensation pattern) and the second pattern (bypass mode), the stopping needing compressor 51 and the operation of restarting, thus have the problem of the switching action spended time of pattern.

On the other hand, if keep compressor 51 to operate switch first mode and the second pattern unchangeably, then become during switching action and keep compressor 51 to operate unchangeably via the 3rd pattern (stop mode) or four-mode (refrigerant-recovery pattern), thus the running under becoming throttle, and for compressor 51, have the problem of not recommending.

According to the first embodiment, switch via prevent condense pipe arrangement 17 first mode (preventing condensation pattern) and not via prevent condensation pipe arrangement 17 the second pattern (bypass mode) time not via other pattern.Therefore, even if keep compressor 51 to operate carry out switching action unchangeably, also can not operate under the state of throttling, switching action can be carried out at short notice, and the excessive pressure increase of compressor 51 can not be produced, thus the reliability of the equipment (refrigerator 1) possessing cold-producing medium transfer valve 60 can be improved.

In addition, in this first embodiment, as shown in Figure 14 ~ Figure 16, citing illustrates the situation 90 ° configuring connected entrance B, connected entrance C and connected entrance D successively on diagram clockwise direction, even if but when on the contrary with in the contrary counter clockwise direction of diagram every 90 ° Di configure, if the shape of spool sliding contact surface 81 and spinning movement direction are set to and illustrate symmetrical mirror image, then can carry out and the identical switching of connected entrance B, C, D shown in Figure 15, Figure 16 and the switching action of refrigerant loop.

6. can realize the simplification of pipe arrangement.

In the past, when in order to switch via prevent condense pipe arrangement 17 prevent condensation pattern (first mode) and get around prevent condensation pipe arrangement 17 bypass mode (the second pattern) and be provided with the structure of cold-producing medium transfer valve and cold-producing medium check valve, cold-producing medium transfer valve as cross valve possesses an inflow pipe and three communicating pipes, cold-producing medium check valve possesses an inflow pipe and an outlet, thus at least needs to connect six positions by solder brazing to be connected with refrigerant loop.

On the other hand, in the cold-producing medium transfer valve 60 of the first embodiment (the present invention), as shown in Figure 9, Figure 10, cold-producing medium transfer valve 60 possesses an inflow pipe 68 and three communicating pipe 69 (69a, 69b, 69c) amounts to four pipes, in addition cold-producing medium check valve is not needed, thus in order to cold-producing medium transfer valve 60 is connected to refrigerant loop, solder brazing is carried out to four positions, solder brazing position can be reduced and then realize cost degradation.

And, when in the past possess the structure of cold-producing medium transfer valve and cold-producing medium check valve, in order to a part for refrigerant piping being connected to one end and the other end of cold-producing medium check valve, compare with not having the situation of cold-producing medium check valve, the length of refrigerant piping is longer.In first embodiment (the present invention), owing to not arranging cold-producing medium check valve, so do not need to increase the length of refrigerant piping, thus save the material of refrigerant piping and also effective for protection of resources.

In addition; in above-mentioned explanation; the structure possessing cold-producing medium transfer valve and cold-producing medium check valve in the past and the first embodiment are compared and be illustrated; but be not limited to and the comparing of the structure being provided with cold-producing medium check valve; with the structure comparison possessing the cold-producing medium transfer valve as magnetic valve of 2 formulas in the past; this first embodiment also can reduce solder brazing position; and do not need to increase the length of refrigerant piping, thus knownly can save the material of refrigerant piping and there is effect in protection of resources yet.

7. utilize the pressure of cold-producing medium to improve close property.

In the cold-producing medium transfer valve 60 of the first embodiment, the cold-producing medium from the high pressure of compressor 51 flows into the space in valve chest 66 via the first refrigerant piping 55 (with reference to Fig. 5), inflow pipe 68 (with reference to Figure 11), inflow entrance A (with reference to Figure 10).

Therefore, the pressure of cold-producing medium is as the power in the direction pressed to seat board 67 by spool 80 and the spool 80 put in the valve chest 66 shown in Figure 11.Thus, improve the close property between the spool sliding contact surface 81 of spool 80 and seat board 67, and the leakage of cold-producing medium can be reduced.

8. can realize the miniaturization of cold-producing medium transfer valve 60 (projected area).

As shown in figure 11, in the cold-producing medium transfer valve 60 of the first embodiment, the rotor pinion 75 rotated integrally with rotor 70 and rotor drive division 74 is overlapping on spool 80, and rotor pinion 75 and spool 80 are configured to the poppet shaft 71 that can make coaxially as common axis of rotation and rotate freely.In addition, be configured with idler gear 79 around the pony axle 78 be provided separately with poppet shaft 71, this idler gear 79 is provided with idle running gear wheel 79b and loose pinion 79a integratedly.

And, make rotor pinion 75 and idle running gear wheel 79b engage and slow down, and make loose pinion 79a and valve core gear 83 engage and slow down further.Thus, rotor pinion 75, idler gear 79, these three gears of valve core gear 83 can configure around poppet shaft 71 and these two axles of pony axle 78.

Therefore, it is possible to configure three gears in the projected area of two gears, thus cold-producing medium transfer valve 60 can be made miniaturized.

9. can increase the torque of spool 80.

Owing to carrying out the deceleration in two stages from rotor pinion 75 to valve core gear 83, so speed reducing ratio becomes large, thus the torque of transmitting to spool 80 can be increased.Therefore, it is possible to reliably carry out the switching action of spool 80.

In addition, even if spool 80 increases with the friction of valve seat (the second seat board portion 67b), torque also can not deficiency (torque is larger), thus spool 80 does not need to use special low-friction material.In addition, even the combination of the low stators and rotators of torque, also can increase torque and carry out action, thus cold-producing medium transfer valve 60 can be made cheap.

10. can guarantee the pressing force of spool 80 to the appropriateness of the second seat board portion 67b.

As shown in figure 11, in cold-producing medium transfer valve 60, rotor 70 (rotor drive division 74, rotor pinion 75) and spool 80 are with common poppet shaft 71 arranged coaxial, rotor 70 (rotor drive division 74, rotor pinion 75) is placed on spool 80, and exerts a force with leaf spring 86 pairs of rotors 70 (rotor drive division 74, rotor pinion 75).

Thus, utilize the active force of leaf spring 86 and the deadweight of rotor 70 (rotor drive division 74, rotor pinion 75), relative to valve seat (the second seat board portion 67b), spool 80 is exerted a force, so with the pressing force of appropriateness, spool sliding contact surface 81 is pressed on valve seat (the second seat board portion 67b), thus reliably can be closed the pressing force of cold-producing medium.

Poppet shaft 71 can be set to easy double base structure by 11..

As shown in figure 11, in cold-producing medium transfer valve 60, the poppet shaft 71 of supporting spool 80 is following double base structures, namely, be pressed into and be supported on the rotor shaft hatch with the end 72 arranged on the second seat board portion 67b of the valve seat connected with spool 80 by spool sliding contact surface 81, and supporting two ends by the rotor bearing 73 as recess of the upper end being located at valve chest 66.

Therefore, easily obtain the supporting rigidity of spool 80, precision, reliably can close cold-producing medium in spool sliding contact surface 81.In addition, owing to being the structure that rotor 70 (rotor drive division 74, rotor pinion 75) rotates around poppet shaft 71, so do not need to arrange high-precision bearing at rotor shaft hatch 72, rotor bearing 73, thus cold-producing medium transfer valve 60 can be made cheap.

In addition, arrange and need around the rotor 70 of poppet shaft 71 running accuracy and spool 80, rotor 70 and spool 80 are configured to rotate around identical axle, thus easily obtain axiality and running accuracy is higher.

12. due to pony axle 78 are cantilevered construction, so improve the assembleability of cold-producing medium transfer valve 60.

As shown in figure 11, in the cold-producing medium transfer valve 60 of the first embodiment, pony axle 78 becomes cantilevered construction, thus improves the assembleability of cold-producing medium transfer valve 60.In addition, even if when idler gear 79 is moved upward, because idle running gear wheel 79b abuts with rotor drive division 74, so can prevent coming off of idler gear 79.

In addition, as mentioned above, form jut 74s preferably by rotor drive division 74, and form jut 79s at idler gear 79, reduce the contact area of rotor drive division 74 and idle running gear wheel 79b.Thereby, it is possible to avoid the increase of extra frictional force.

13. make seat board 67 one-tenth be integrated, and communicating pipe 69 is located at the thickest portion.

The problem points of the first seat board portion 67a and the second seat board portion 67b mutual situation about being engaged by solder brazing is independently described, the sliding surface that namely this solder flux can slide with spool 80 from junction surface to the surface of the second seat board portion 67b oozes out, and has spool sliding contact surface 81 cannot seal the problem of connected entrance B, C, D hermetically under these circumstances.

On the other hand, in present embodiment, because the first seat board portion 67a and the second seat board portion 67b is one, so prevent solder flux from oozing out to seat board 67 surface, thus there is the effect that reliably can seal cold-producing medium.

And, when the diameter of spool sliding contact surface 81 is set to d, by in the scope arranging diameter d from periphery than the abundant inner circumferential side of scope producing grinding turned-down edge, eliminate the impact of the turned-down edge caused by grinding, spool sliding contact surface 81 and seat board 67 can be slidingly contacted seamless unoccupied place with higher precision, thus be improved sealing and reduce the leakage of cold-producing medium, the effect of the switching precision of valve can be improved.

In addition, as shown in Figure 11 or Figure 17, in the cold-producing medium transfer valve 60 of the first embodiment, the second seat board portion 67b maximum at the thickness of the central portion of seat board 67 is provided with communicating pipe 69.Being communicated with pore 87 by arranging in the thickest portion of seat board 67, can guaranteeing that communicating pipe 69 inserts the insertion depth being communicated with pore 87.

Armature spindle is pressed into rotor shaft hatch 72 with the end to improve precision by 14..

The rotor shaft hatch 72 being located at the central authorities of the second seat board portion 67b has bottom outlet, seamless unoccupied place press-in standing valve mandrel 71.

When the thickness of the second seat board portion 67b being set to t0, the degree of depth of rotor shaft hatch 72 with the end is set to t1, by communicating pipe 69b, communicating pipe 69c, communicating pipe 69d the degree of depth that is fitted together to be set to t2 time, if meet the relation of t0 > (t1+t2), then rotor shaft hatch 72 be communicated with pore 87 and interfere and not open holes.Therefore, when carrying out solder brazing to communicating pipe 69, solder flux does not flow into rotor shaft hatch 72, so be suitable.In addition, due to relative to rotor shaft hatch 72 seamless unoccupied place press-in standing valve mandrel 71, so poppet shaft 71 easily guarantees perpendicularity relative to the second seat board portion 67b, thus high accuracy is obtained.

The peripheral part of 15. seat boards 67 is the thinnest, and the central portion being provided with communicating pipe is the thickest, is interior thickness between peripheral part and central portion, and concentric circles ground is formed, thus can prevent the thermal deformation of spool when welding.

By being set to the thinnest by the peripheral part (the 3rd seat board portion 67c) heated to weld with valve chest 66, thus the heat reduced required for welding, the central portion (the second seat board portion 67b) being used for the connection pore 87 of solder brazing by inserting communicating pipe 69 by being provided with is set to the thickest, thus reliably carry out the fixing of communicating pipe 69, and be pressed into supporting valve mandrel 71 at rotor shaft hatch 72 with the end, by (the first seat board portion 67a) between peripheral part and central portion being set to middle thickness, thus the heat be difficult to when transmitting welding to the spool 80 being in central portion, the thermal deformation of spool 80 can be prevented, therefore the spool sliding contact surface 81 of spool 80 is maintained accurately, and the close property that can improve between seat board 67, thus the leakage of cold-producing medium can be reduced.

16. owing to being located at interior thickness portion so assembleability is good by inflow pipe.

Owing to being located at flowing into pore 89 in seat board 67 the first seat board portion 67a possessing middle thickness t4, so solder flux can reliably enter with the gap flowing into pore 89 to inflow pipe 68 and can reliably seal, and fully can guarantee the intensity after solder brazing.

Further, the workability when flowing into pore 89 through inflow pipe 68 is also good.

17. widen inflow pipe partly and temporarily fix.

After with convex amount 97 ground giving prominence to regulation from the first seat board portion 67a configuration inflow pipe 68, the end local deformation of inflow pipe 68 is made in the mode of widening end face two positions circumferentially or three positions, and crimp with inflow pore 89 in pressure contact portion 95, thus there is following effect, namely, crimping inflow pipe 68 and the first seat board portion 67a and prevent dislocation, and can inflow pipe 68 and flowing into guarantee between pore 89 solder flux flow into required for gap.

Further, due to convex amount 97 ground giving prominence to regulation from the first seat board portion 67a configuration inflow pipe 68, so also there is the effect preventing the inside to the surperficial solder flux oozed out of the first seat board to inflow pipe 68 from entering.

Further, due to convex amount 97 ground giving prominence to regulation from the first seat board portion 67a configuration inflow pipe 68, so flow upward further from the fluid of inflow pipe 68 discharge, thus the effect that fluid can be utilized to push spool 80 from the top to the bottom is also had.In addition, the position that the convex amount 97 of regulation is now preferably high than spool sliding contact surface 81.

18. utilize the ladder of seat board can improve the welding precision with valve chest.

If make the ladder H of valve chest 66 side produced between the first seat board portion 67a and the 3rd seat board portion 67c larger than the bending R of valve chest 66, i.e. H > R, then from the sliding contact surface of spool 80 (H-R) scope in, the inner circumferential of valve chest 66 and the periphery of the first seat board portion 67a are fitted together to mutually at the cylindrical portion place of diameter D1, thus can the coaxial precision inner circumferential of normal valve housing 66 and the periphery of the first seat board portion 67a well, also can guarantee higher axiality after welding, from but suitable.

Next, the cold-producing medium transfer valve of Figure 23 to the second embodiment is used to be described.In addition, Tu23Zhong, for ease of illustrating, adding hatching to the spool sliding contact surface 81A connected with seat board 67 and illustrating.Figure 23 (A) is the key diagram of the internal structure of the first state of the cold-producing medium transfer valve representing the second embodiment, Figure 23 (B) is the key diagram of the internal structure of the second state of the cold-producing medium transfer valve representing the second embodiment, and Figure 23 (C) is the key diagram of the internal structure of the third state of the cold-producing medium transfer valve representing the second embodiment.

The cold-producing medium transfer valve of the first embodiment is cross valve, in contrast, the cold-producing medium transfer valve of the second embodiment is triple valve, seat board 67 is formed inflow entrance A, connected entrance B and connected entrance D and do not formed connected entrance C in different.

In addition, the spool 80 of the first embodiment is formed at spool sliding contact surface 81 and is communicated with recess 82, in contrast, the spool 80A of the 3rd embodiment spool sliding contact surface 81A do not formed be communicated with recess in different.

Figure 23 (A) is that connected entrance B is to valve chest 66 inside opening and the first state of being covered by spool 80A of connected entrance D.Under this first state, it is the state that inflow entrance A is communicated with connected entrance B, connected entrance D closes.

Figure 23 (B) is the second state that connected entrance B and connected entrance D is covered by spool 80A, is to make spool 80A from the state after the first state (with reference to Figure 23 (A)) counter-clockwise swing 90 °.Under this second state, be connected entrance B and connected entrance D close, with all disconnected state of inflow entrance A.

Figure 23 (C) to be connected entrance B by spool 80A cover and connected entrance D to the third state of valve chest 66 inside opening, be that spool 80A is from the state after the second state (with reference to Figure 23 (B)) counter-clockwise swing 90 °.Under this third state, it is the state that inflow entrance A is communicated with connected entrance D, connected entrance B closes.

If the state be communicated with inflow entrance A is set to "ON", the state be not communicated with inflow entrance A is set to " closing ", with the state of the form of " connected entrance B/ connected entrance D " performance connected entrance B and connected entrance D, then the cold-producing medium transfer valve of the second embodiment can obtain " opening/closing ", " close/close ", " close/open " these three states.Namely, following triple valve can be become, namely, when be open state (with reference to Figure 23 (A)) from only connected entrance B to only connected entrance D be open state (with reference to Figure 23 (C)) switch time, via connected entrance B and connected entrance D for the state of closing (with reference to Figure 23 (B)) switches.

According to the cold-producing medium transfer valve of the second embodiment, the structure identical by the cold-producing medium transfer valve with the first embodiment can play function as triple valve.In addition, can promptly carry out the circulation of cold-producing medium and the switching of cut-out, can improve and be close to performance between spool sliding contact surface 81A and seat board 67, and the reliability of the leakage suppressing cold-producing medium can be improved.

" the 3rd embodiment "

Next, the cold-producing medium transfer valve of Figure 24 and Figure 25 to the 3rd embodiment is used to be described.In addition, Tu25Zhong, for ease of illustrating, adding hatching to the spool sliding contact surface 81B connected with seat board 67 and illustrating.Figure 24 is the stereogram of the spool 80B that the cold-producing medium transfer valve of the 3rd embodiment possesses.Figure 25 (A) is the key diagram of the internal structure of the first state of the cold-producing medium transfer valve representing the 3rd embodiment, Figure 25 (B) is the key diagram of the internal structure of the second state of the cold-producing medium transfer valve representing the 3rd embodiment, and Figure 25 (C) is the key diagram of the internal structure of the third state of the cold-producing medium transfer valve representing the 3rd embodiment.Figure 25 (D) is the key diagram of the internal structure of the 4th state of the cold-producing medium transfer valve representing the 3rd embodiment.

The cold-producing medium transfer valve of the first embodiment is cross valve, in contrast, the cold-producing medium transfer valve of the 3rd embodiment is triple valve, seat board 67 is formed with inflow entrance A, connected entrance C and connected entrance D, do not formed connected entrance B in different.

In addition, the area of the spool sliding contact surface 81 of the spool 80 of the first embodiment be can block three connected entrances size (with reference to Figure 15 (1)) and be formed be communicated with recess 82, in contrast, the spool 80B of the 3rd embodiment the area of spool sliding contact surface 81B be can block adjacent two connected entrances (connected entrance C and connected entrance D) size (with reference to Figure 25 (A)) and do not formed is communicated with recess in difference.Further, different in the shape of block 84B expanding spool 80B in the mode of the pendulum angle expanding spool 80B with the arranging angle of valve core gear 83.

Figure 25 (A) is the first state that connected entrance C and connected entrance D is covered by spool 80B.Under this first state, be connected entrance C and connected entrance D close, with all disconnected state of inflow entrance A.

Figure 25 (B) be connected entrance C to valve chest 66 inside opening and the second state of being covered by spool 80B of connected entrance D, be make spool 80B from the state after the first state (with reference to Figure 25 (A)) counter-clockwise swing 90 °.Under this second state, it is the state that inflow entrance A is communicated with connected entrance C, connected entrance D closes.

Figure 25 (C) is the third state of connected entrance C and connected entrance D to valve chest 66 inside opening, is that spool 80B is from the state after the second state (with reference to Figure 25 (B)) counter-clockwise swing 90 °.Under this third state, it is the state that inflow entrance A is communicated with connected entrance C and connected entrance D.

Figure 25 (D) be connected entrance C covered by spool 80 and connected entrance D to the 4th state of valve chest 66 inside opening, be make spool 80B from the state after the third state (with reference to Figure 25 (C)) counter-clockwise swing 90 °.Under 4th state, it is the state that inflow entrance A is communicated with connected entrance D, connected entrance C closes.

If the state be communicated with inflow entrance A is set to "ON", the state be not communicated with inflow entrance A is set to " closing ", with the state of the form of " connected entrance C/ connected entrance D " performance connected entrance C and connected entrance D, then the cold-producing medium transfer valve of the 3rd embodiment can obtain " close/close ", " opening/closing ", " open/open ", " close/open " these four states.

In addition, the cold-producing medium transfer valve of the 3rd embodiment, by action between the second state to the 4th state, can obtain " opening/closing ", " open/open ", " close/open " these three states.Namely, it can be following triple valve, namely, when be open state (with reference to Figure 25 (B)) from only connected entrance C to only connected entrance D be open state (with reference to Figure 25 (D)) switch time, be that open state (with reference to Figure 25 (C)) switches via connected entrance C and connected entrance D.

According to the cold-producing medium transfer valve of the 3rd embodiment, structure that can be identical by the cold-producing medium transfer valve with the first embodiment is used as triple valve and plays function.In addition, can promptly carry out the circulation of cold-producing medium and the switching of cut-out, can improve and be close to performance between spool sliding contact surface 81B and seat board 67, and the reliability of the leakage suppressing cold-producing medium can be improved.

" the 4th embodiment "

Next, the cold-producing medium transfer valve of Figure 26 to the 4th embodiment is used to be described.In addition, Tu26Zhong, for ease of illustrating, adding hatching to the spool sliding contact surface 81A connected with seat board 67 and illustrating.

Figure 26 (A) is the key diagram of the internal structure of the first state of the cold-producing medium transfer valve representing the 4th embodiment, and Figure 26 (B) is the key diagram of the internal structure of the second state of the cold-producing medium transfer valve representing the 4th embodiment.

The cold-producing medium transfer valve of the first embodiment is cross valve, is two-way valve relative to the cold-producing medium transfer valve of this 4th embodiment, seat board 67 is formed inflow entrance A and connected entrance D, do not formed connected entrance B and connected entrance C in different.

In addition, the spool 80A of the 4th embodiment is identical with the spool 80A of the second embodiment, spool sliding contact surface 81A is not formed be communicated with recess in different.

Figure 26 (A) is the first state that connected entrance D is covered by spool 80A.Under this first state, connected entrance D is the state of closing, and is the state be not communicated with inflow entrance A.

Figure 26 (B) is second state of connected entrance D to valve chest 66 inside opening, is that spool 80A is from the state after the first state (with reference to Figure 26 (A)) counter-clockwise swing 180 °.Under this second state, it is the state that inflow entrance A is communicated with connected entrance D.

If the state be communicated with inflow entrance A is set to "ON", the state be not communicated with inflow entrance A is set to " closing ", with the state of the form of " connected entrance D " performance connected entrance D, then the cold-producing medium transfer valve of the 4th embodiment can obtain "ON", " closing " these two states.

According to the cold-producing medium transfer valve of the 4th embodiment, structure that can be identical by the cold-producing medium transfer valve with the first embodiment is used as two-way valve and plays function.In addition, can promptly carry out the circulation of cold-producing medium and the switching of cut-out, can improve and be close to performance between spool sliding contact surface 81A and seat board 67, and the reliability of the leakage suppressing cold-producing medium can be improved.

" action during fluid-tight "

Next, use Figure 27 (suitably using Figure 17 etc.), the situation producing so-called fluid-tight in refrigerant path (refrigerant loop) is described.Herein, fluid-tight refers to following phenomenon, that is, two ends are closed refrigerant loop, i.e. closed-loop path are full of by the cold-producing medium of liquid, and temperature rises and cold-producing medium thermal expansion afterwards, thus produces high pressure resemble at the pipe arrangement inside of refrigerant loop, valve core inside.

As mentioned above, such as, under the third state (with reference to Figure 16 (3)) of the cold-producing medium transfer valve 60 of the first embodiment, second refrigerant pipe arrangement 56 (and preventing the pipe arrangement 17 that condenses) becomes the closed-loop path cut out by spool 80 at two ends.

The fluid-tight of the third state of the first embodiment (prevent)

And, such as, under the third state (with reference to Figure 16 (3)) of the cold-producing medium transfer valve 60 of the first embodiment, because valve chest 66 becomes the state that the condenser 52 larger with the volume ratio of inside be communicated with, so the volume of closed-loop path (condenser 52, first refrigerant piping 55, valve chest 66) can be larger than the volume (during liquid) of the total refrigerant amount be enclosed, thus fluid-tight can be prevented.

In addition, for the 3rd refrigerant piping 57 of closing because of the connected entrance C of cold-producing medium transfer valve 60 and compressor 51, cooler 7, the volume playing the inside of the cooler 7 of function as evaporimeter is also larger, thus can prevent fluid-tight.

Figure 27 is the amplification partial sectional view of the second seat board portion 67b of cold-producing medium transfer valve 60 after the pressure increase representing communicating pipe 69 side, spool 80 and the section of communicating pipe 69.

If the inside of closed-loop path is all full of by the cold-producing medium of liquid, temperature rises and cold-producing medium thermal expansion afterwards, then the pressure P 2 of the cold-producing medium after thermal expansion applies from communicating pipe 69 towards spool 80 (from diagram below upward).

But, as illustrated by Figure 11 or Figure 12, by loading rotor 70 (rotor drive division 74, rotor pinion 75) on spool 80, be configured to, utilize the deadweight of rotor 70 (rotor drive division 74, rotor pinion 75) and the active force of leaf spring 86, apply pressure in advance relative to the second seat board portion 67b.In addition, spool 80 is applied to the pressing force caused by the pressure P 1 of the cold-producing medium of valve chest 66 inside.

Herein, if the pressure P of cold-producing medium 2 is larger than P1, and be subject to exceeding the power of total of the deadweight of rotor 70 (rotor drive division 74, rotor pinion 75), the active force of leaf spring 86 and the pressing force caused by pressure P 1, then leaf spring 86 shrinks, as shown in figure 27, spool 80 and rotor 70 (rotor drive division 74, rotor pinion 75) move to the direction of floating along poppet shaft 71 from the second seat board portion 67b.Because spool 80 floats, so the cold-producing medium in communicating pipe 69 flows out from the gap between spool 80 and the second seat board portion 67b to the inside of valve chest 66, thus the pressure in communicating pipe 69 reduces.And if the pressure in communicating pipe 69 reduces, then because of the deadweight of rotor 70 (rotor drive division 74, rotor pinion 75) and the active force of leaf spring 86, spool 80 and the second seat board portion 67b are close to.

Like this, spool 80 can float from the second seat board portion 67b, thus has the effect that the pressure anomaly in communicating pipe 69 can be suppressed to rise.

In addition, for the effect that the pressure anomaly suppressed in communicating pipe 69 rises, be not limited to the state of the fluid-tight be full of by liquid refrigerant in communicating pipe 69, under in communicating pipe 69, inside is only the admixture of gas or gas and liquid, Yin Wendu rise and thermal expansion thus pressure increase when also have identical effect.

In addition, in first embodiment, the configuration of connected entrance B, C, D is set to foursquare vertex position, if but identical with the on-off action of the connected entrance of the rotation of the adjoint spool 80 of the first embodiment, then the angle of adjacent connected entrance also can be the angle staggered from 90 °.

" the 5th embodiment "

Next, the cold-producing medium transfer valve of Figure 28 to the 5th embodiment is used to be described.

That Figure 28 is the structure of the cold-producing medium transfer valve 60 representing the 5th embodiment, identical with Figure 18 sectional view, the aspect different from Figure 18 is, expand the diameter of the second seat board portion 67b and make it the diameter of approximately the first seat board portion 67a, inflow pipe 68 is not arranged on the first seat board portion 67a and is arranged on the second seat board portion 67b, the not through second seat board portion 67b of inflow pipe 68, the side opening diameter of configuration spool 80 is such as the inflow entrance A of left and right, the enlarged-diameter of the inflow pore 89 of the opposition side of the side of configuration spool 80.In the part of the enlarged-diameter of inflow pore 89, be fitted together to and solder brazing ground engages inflow pipe 68.

" other embodiment "

1. in above-mentioned first ~ five embodiment, in cold-producing medium transfer valve 60, citing represents and describes spool 80 and rotor 70 is coaxial situation, the situation etc. between rotor drive division 74 and spool 80 with reducing gear, if but cold-producing medium transfer valve 60 realize illustrating in above-mentioned first ~ five embodiment function, effect, in other words, if meet the structure of the cold-producing medium transfer valve described in scope of claims, then the structure of cold-producing medium transfer valve 60 also can adopt the structure beyond the structure that illustrates in above-mentioned first ~ five embodiment.

2. in above-mentioned first ~ five embodiment, citing illustrates the situation that the spool 80 of cold-producing medium transfer valve 60 is rotated, if but the opening and closing of spool 80 can carry out illustrated such situation, be then not limited to rotation, it also can be the movement beyond rectilinear motion etc. rotates.In addition, when making above-mentioned spool 80 rotate, Reliability of Microprocessor is high, structure is simple and compact, thus preferably makes the structure that the spool 80 of explanation rotates.

3. in above-mentioned first ~ five embodiment, as transfer valve, citing illustrates the cold-producing medium transfer valve 60 of the flowing controlling cold-producing medium, but also can be the transfer valve of the flowing of the circulatory mediator controlling other.

4. in above-mentioned first ~ five embodiment, the rotation of rotor rotates with being configured to via pinion and idler gear, spool to be slowed down, but also can be following structure, namely, not there is idler gear and do not make rotor and spool deceleration ground directly link, thus the rotation of rotor is directly passed to spool.

5., in above-mentioned first ~ five embodiment, as equipment, citing illustrates refrigerator, but can certainly be used for the equipment beyond refrigerator.

Above, various embodiment of the present invention is illustrated, but various correction and change can be carried out within the scope of the invention.That is, concrete mode of the present invention suitably can change arbitrarily in the scope of purport not changing invention.

Claims (3)

1. a cold-producing medium transfer valve, is characterized in that, possesses:

Spool;

Cover the valve chest of the one end open of above-mentioned spool; And

Be located at the seat board of one end of above-mentioned valve chest,

Above-mentioned seat board possesses:

First seat board portion; And

Be located at the periphery in above-mentioned first seat board portion and the peripheral valve seat plate portion thinner than above-mentioned first seat board portion,

Above-mentioned valve chest possesses the expansion section expanded towards above-mentioned open side,

This expansion section is positioned at the height dimension of the ladder formed by above-mentioned first seat board portion and above-mentioned peripheral valve seat plate portion,

Weld part is formed in the periphery in the periphery of above-mentioned valve chest and above-mentioned peripheral valve seat plate portion.

2. cold-producing medium transfer valve according to claim 1, is characterized in that,

The upper position of inner circumferential in above-mentioned expansion section of above-mentioned valve chest is chimeric with above-mentioned first seat board portion.

3. an equipment, is characterized in that,

Possesses the cold-producing medium transfer valve described in claim 1 or 2.