CN101644347A - Valve core for four-way switching valve and four-way switching valve thereof - Google Patents
Valve core for four-way switching valve and four-way switching valve thereof Download PDFInfo
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- CN101644347A CN101644347A CN200910165252A CN200910165252A CN101644347A CN 101644347 A CN101644347 A CN 101644347A CN 200910165252 A CN200910165252 A CN 200910165252A CN 200910165252 A CN200910165252 A CN 200910165252A CN 101644347 A CN101644347 A CN 101644347A
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Abstract
The present invention provides a valve core for a four-way switching valve, which can ensure smooth fluid movement in the valve core and can improve mechanical strength. The four-way switching valve (2) comprises the following components: a valve body (3) with a closed space; a first pipe (5) connected with one side of the valve body (3); a second pipe (7) connected with the other side of the valve body (3); a third pipe (11) and a fourth pipe (12) which are separated by the second pipe (7) and configured adjacently with two sides; a valve seat (16) which is provided in the valve body (3) andis provided with an opening communicated with each pipe; and a valve core (1) which is slidably configured to the valve seat (16). Through the sliding of the valve core (1), the communication state between the first pipe (5) and the third pipe (11) or between the first pipe (5) and the fourth pipe (12) is selectively switched. The valve core (1) comprises the following components: a supporting rod(1d) which is configured to penetrate an opening end face part (1j) adjacently with the opening end face part (1j) of a bowl-shaped body (1c); and a flange part (projected part) (1k) which is formedintegrally with the a main body (1c) at the position of the of the opening end face part (1j) that is next to the main body (1c). The flange part (1k) projects to a position that is next to the innerwall surface (3c) of the valve body (3) from the outer surface of the main body (1c) along the axial direction of the supporting rod (1d).
Description
Technical field
The present invention relates to employed four-way switching valve spool and four-way switching valves such as equipment that a kind of chiller plant, air conditioner etc. utilize reversible refrigeration cycle.
Background technique
In the past, the configuration four-way switching valve came refrigerant passage is switched the switching of carrying out indoor refrigeration and heating in the refrigerant passage of refrigeration cycle.As such four-way switching valve, in patent documentation 1～3 grade, multiple scheme has been proposed.
As one of above-mentioned four-way switching valve, for example, the four-way switching valve 61 that Figure 12 put down in writing, it is on the valve body 62 of the cylinder shape of airtight hollow, be provided with the connection mouth 65 that is communicated with the discharge tube 80 of compressor 63, with the connection mouth 67 that is communicated with the suction pipe 66 of compressor 63, in the both sides that clip this connection mouth 67, configuration with lead to heat exchanger 68,69 conduit 70,71 2 connection mouths 72 that are communicated with, 73, bowl-shape spool 74 is set on valve seat 76 free sliding, this spool 74 is slided, selectively with the connection mouth 67 of central authorities and the connection mouth 72 of both sides, one of 73 connect.In addition, the tip portion of the discharge tube 80 of compressor 63, the stepped part 64a by conduit 64 is positioned.
Here, constitute the spool 74 of above-mentioned four-way switching valve 61, can form by metal, synthetic resin or with the material of metal and the combination of resin involucra layer etc., especially by adopting synthetic resin to form spool integral body, because the sliding of synthetic resin is good, can guarantee the activity of stable spool, and, can prevent that the thermal efficiency of refrigeration cycle from descending because the thermal conductivity of synthetic resin is low.
On the other hand, spool 74 about above-mentioned four-way switching valve 61, need be careful the distortion that the inside and outside differential pressure by spool 74 causes, especially under the situation that spool 74 integral body are formed by synthetic resin, when producing small distortion on the slip surface 74a at spool 74, from this crushed element ejection, refrigeration agent produces and leaks refrigeration agent under the effect of the pressure reduction of the refrigerant gas inside and outside the spool 74.Therefore, as shown in figure 13, also proposing has following scheme: on the bowl-shape main body 74c that synthetic resin is made, set up 2 metal poles 75 with the facial 74b of the opening end that crosses main body 74c.In addition, pole 75 has lip part 75a at two ends, this lip part 75a is pressed into formed stepped part on the inwall of main body 74c, thereby pole 75 is installed on the main body 74c.
Patent documentation 1: Japanese kokai publication hei 11-201297 communique
Patent documentation 2: TOHKEMY 2004-125238 communique
Patent documentation 3: Japanese kokai publication hei 7-151251 communique
The problem that invention will solve
In above-mentioned structure in the past, when using high-pressure refrigerant (for example R410A etc.), spool 74 inside and outside pressure reduction become big, so spool 74 distortion, produce that switch motion can not carry out smoothly or undesirable condition such as fluid leakage.And, also may be owing to causing that against pressing spool 74 enlarges, make that strengthening pole 75 comes off.
And, as shown in figure 14, the gap d between the periphery of the connection mouth 65 of conduit 64 and the outer circumferential face 74d of spool 74 is narrow, so the pressure loss of high-pressure refrigerant when the direction of arrow of this figure flows becomes big, can cause refrigerant flow to reduce, cause that the efficient of refrigeration unit etc. reduces.
In addition, as shown in figure 15, four-way switching valve 61 in the past, because spool 74 is inner narrow, so the pressure loss of low pressure refrigerant when the direction of arrow of this figure flows become big, can cause refrigerant flow to reduce, and causes that the efficient of refrigeration unit etc. reduces.
Summary of the invention
The present invention makes in view of the problem points of above-mentioned four-way switching valve in the past, purpose be to provide a kind of can guarantee valve core inside along the moving of sliding fluid, and can improve the four-way switching valve spool of mechanical strength.
And, another object of the present invention is to, a kind of four-way switching valve that can suppress the pressure loss that flows through the high-pressure refrigerant etc. of valve body inside less is provided, in addition, another purpose of the present invention is, a kind of four-way switching valve that can suppress the pressure loss that flows through the low pressure refrigerant etc. of valve core inside less is provided.
Solve the means of problem
In order to achieve the above object, spool of the present invention is used for four-way switching valve, and this four-way switching valve comprises: the valve body with confined space; With the sidepiece binding of this valve body and the 1st conduit that is communicated with described confined space; With the other side binding of described valve body and the 2nd conduit that is communicated with described confined space; Clip the 2nd conduit respectively disposed adjacent in its both sides and the 3rd and the 4th conduit that is communicated with described confined space; Be positioned at described valve body and have the valve seat of the opening portion that is communicated with described the 2nd to the 4th conduit respectively; And the spool that is disposed at this valve seat slidably, by this spool is slided to a direction or another direction, selectively between described the 1st conduit and described the 3rd conduit or the connected state between described the 1st conduit and described the 4th conduit switch, described spool comprises: bowl-shape spool main body; Opening end near this spool main body sets up the bar-like member that becomes to cross this opening end face facially; And on position near the described opening end face of described spool main body, the lip part integrally formed with this spool main body, this lip part along the axial direction of described bar-like member, is projected into the position near the internal face of described valve body from the outer surface of this spool main body.
Adopt the present invention, on position near the described opening end face of described spool main body, have the lip part integrally formed with this spool main body, this lip part is from the outer surface of this spool main body, axial direction along described bar-like member, be projected into position, therefore can keep the size constancy of valve body and strengthen the mechanical strength of spool near the internal face of described valve body.And, can do the external diameter of bar-like member less, and bar-like member is provided with near valve seat ground.Thus, bar-like member can not enter the inside of the fluid passage of spool, can avoid bar-like member to become fluid resistance.Consequently, can keep the mechanical strength of four-way switching valve, and guarantee the moving along sliding fluid of this valve core inside with spool.
, the outer circumferential face of described lip part can be constituted with in the spool at above-mentioned four-way switching valve, have the radius of curvature that equates substantially with the radius of curvature of the internal face of described valve body.
And,, can constitute with in the spool at above-mentioned four-way switching valve, the center line of described bar-like member is compared with the face with described valve seat opposition side of described lip part, is positioned at the position of more close described valve seat side.
Use in the spool at above-mentioned four-way switching valve, have 2 described bar-like members, these 2 bar-like members can be configured to, parallel to each other, under described the 1st conduit and state that described the 3rd conduit is communicated with, the opening surface with described the 2nd conduit and described the 4th conduit is not relative, and under described the 1st conduit and state that described the 4th conduit is communicated with, the opening surface with described the 2nd conduit and described the 3rd conduit is not relative.Thus, can further improve the mechanical strength of spool, and can avoid 2 bar-like members to become fluid resistance.In addition, 2 bar-like members preferably are positioned at not the position of interfering with stream, as far as possible away from and dispose.And, also can be provided with 1 described bar-like member, and this bar-like member has the lip part of the rectangle that contacts with described spool at two ends.
In adopting the four-way switching valve of above-mentioned arbitrary described spool, can make the smallest cross sectional between the outer circumferential face of periphery and described spool of connection mouth of described the 1st conduit of described valve body amass the internal diameter sectional area that is equal to or greater than the pipe that is connected with described the 1st conduit.Thus, make the long-pending internal diameter sectional area that is equal to or greater than the pipe that is connected with the 1st conduit of smallest cross sectional between the outer circumferential face of periphery and described spool of connection mouth of the 1st conduit, therefore, the pressure loss of the fluid between the outer circumferential face of the periphery of the connection mouth that flows through the 1st conduit and spool is diminished, when this four-way switching valve being applied to refrigeration unit etc., can not cause that refrigerant flow reduces, can avoid the reduction of the efficient of refrigeration unit etc.
In above-mentioned four-way switching valve, can constitute, described the 1st conduit has and the identical axis of described the 2nd conduit, and has the big internal diameter of external diameter than the pipe that is connected with the 1st conduit.Thus, as mentioned above, can make the long-pending internal diameter sectional area that is equal to or greater than the pipe that is connected with described the 1st conduit of smallest cross sectional between the outer circumferential face of periphery and spool of connection mouth of the 1st conduit.
And, this four-way switching valve is applied to the refrigerant passage of cooling cycle system is switched, the pipe that will be connected with described the 1st conduit is as the discharge tube of the employed compressor of this refrigeration cycle, and the block of inside that can be by being darted at described the 1st conduit should be discharged pipe clamp and be ended.Adopt this structure, make with the pipe connecting structure of the discharge tube of compressor simply, and when being applied to cooling cycle system such as refrigeration unit, can not cause the refrigerant flow reduction, can avoid the reduction of the efficient of refrigeration unit etc.
In the four-way switching valve that adopts above-mentioned arbitrary described spool, can make described the 2nd to the 4th conduit have identical internal diameter, and make the internal diameter of the valve port footpath of described spool more than or equal to the 2nd to the 4th conduit.Thus, make the internal diameter of the valve port footpath of spool more than or equal to the 2nd conduit to the 4 conduits, therefore, valve port and near the mobile of fluid thereof become along sliding, the pressure loss that flows through the fluid of valve core inside can be suppressed less.Consequently, when this four-way switching valve being applied to refrigeration unit etc., can not cause that refrigerant flow reduces, can avoid the reduction of the efficient of refrigeration unit etc.
In above-mentioned four-way switching valve, with the fluid passage of the inside of described spool along the sectional area of cutting open perpendicular to the face of the streamline of the fluid by this fluid passage, can be more than or equal to the internal diameter sectional area of valve port.Thus, can make the pressure loss of the fluid that flows through valve core inside littler.
In above-mentioned four-way switching valve, can make the long-pending internal diameter sectional area that is equal to or greater than the pipe that is connected with described the 1st conduit of smallest cross sectional between the outer circumferential face of periphery and described spool of connection mouth of described the 1st conduit of described valve body.Thus, the pressure loss of fluid of periphery that can prevent to flow through the connection mouth of the 1st conduit becomes big.
In above-mentioned four-way switching valve, described the 1st conduit can be constituted, have and the identical axis of described the 2nd conduit, and have the big internal diameter of external diameter than the pipe that is connected with the 1st conduit.Thus, can make near the space of periphery of the connection mouth of the 1st conduit form greatlyyer, even it is long-pending to enlarge the open profile of fluid passage of inside of described spool, can guarantee fully that also the smallest cross sectional between the outer circumferential face of periphery and described spool of connection mouth of described the 1st conduit is amassed.
And, this four-way switching valve is applied to the refrigerant passage of cooling cycle system is switched, the pipe that will be connected with described the 1st conduit is as the discharge tube of the employed compressor of this refrigeration cycle, and the block of inside that can be by being darted at described the 1st conduit should be discharged pipe clamp and be ended.Adopt this structure, make with the pipe connecting structure of the discharge tube of compressor simply, and when being applied to cooling cycle system such as refrigeration unit, can not cause the refrigerant flow reduction, can avoid the reduction of the efficient of refrigeration unit etc.
The effect of invention
As mentioned above, adopt the present invention, a kind of four-way switching valve spool can be provided, this four-way switching valve can be guaranteed mobile along the fluid of cunning of valve core inside with spool, and can improve mechanical strength.
And, adopt the present invention, a kind of four-way switching valve can be provided, this four-way switching valve can make the pressure loss of high-pressure refrigerant of flowing through valve body inside etc. less, when being applied to cooling cycle system, can not cause the reduction of refrigerant flow, can avoid the reduction of the efficient of refrigeration unit etc.
In addition, a kind of four-way switching valve can be provided, and this four-way switching valve can make the pressure loss of the low pressure refrigerant that flows through valve core inside less, when being applied to cooling cycle system, can not cause the reduction of refrigerant flow, can avoid the reduction of the efficient of refrigeration unit etc.
Description of drawings
Fig. 1 is the sectional drawing of the 1st example of the expression four-way switching valve that adopts spool of the present invention.
Fig. 2 is the figure of the spool of presentation graphs 1, (a) is main pseudosection, (b) is worm's eye view, (c) is side cutaway view, (d) is the partial enlarged drawing of (c).
Fig. 3 is the spool of presentation graphs 2 and the figure of the relation between the valve seat, is main pseudosection (a), (b) is the B-B line sectional drawing of (a), (c) is the A-A line sectional drawing of (a).
Fig. 4 is other the figure of example of expression spool, (a) is main pseudosection, (b) is worm's eye view.
Fig. 5 is the sectional drawing of the 2nd example of the expression four-way switching valve that adopts spool of the present invention.
Fig. 6 is the sectional drawing of difference of shape that is used to illustrate the spool etc. of the shape of four-way switching valve shown in Figure 5 and in the past four-way switching valve.
Fig. 7 is the sectional area of tubular protuberance of expression four-way switching valve and the chart of the relation between the pressure loss.
Fig. 8 is the sectional drawing of the 3rd example of the expression four-way switching valve that adopts spool of the present invention.
Fig. 9 is the sectional drawing that is used to illustrate the shape of four-way switching valve shown in Figure 8 and the difference of the shape of the spool of in the past four-way switching valve.
Figure 10 is the chart that the conversion valve port to four-way switching valve shown in Figure 8 and four-way switching valve in the past directly compares.
Figure 11 is the chart of the relation between sectional area and the pressure loss in the middle of the valve of spool of expression four-way switching valve.
Figure 12 is a sectional drawing of representing an example of four-way switching valve in the past.
Figure 13 is the figure of an example of the employed spool of four-way switching valve of expression Figure 12, (a) is main pseudosection, (b) is worm's eye view, (c) is side cutaway view.
Figure 14 is used for the sectional drawing that the pressure loss to the high-pressure refrigerant of the valve body inside of flowing through four-way switching valve in the past describes.
Figure 15 is used for the sectional drawing that the pressure loss to the low pressure refrigerant of the valve core inside that flows through four-way switching valve in the past describes.
Symbol description
1 spool
1a connection recess
The 1b lip part
The 1c main body
1d pole (rod member)
The 1e leaf spring
The 1f lip part
The 1g stepped part
The 1h projection
The 1i recess
1j opening end face
The 1k protuberance
2 four-way switching valves
3 valve bodies
The 3a key
The 3b key
The 3c internal face
4 compressors
5 discharge tubes
6 connection mouths
7 suction pipes
8 connection mouths
9 heat exchangers
10 heat exchangers
11 conduits
12 conduits
13 connection mouths
14 connection mouths
16 valve seats
The 16a slip surface
17 pistons
18 pistons
19 webs
20 hyperbaric chambers
21 operating chamber
22 operating chamber
23 conduits
24 conduits
25 four-ways switch pilot valve
26 conduits
27 conduits
30 four-way switching valves
31 spools
The 31m outer circumferential face
32 conduits
The 32a bottom
32b top
The 32c block
33 connection mouths
34 discharge tubes
40 four-way switching valves
41 spools
Embodiment
With reference to Fig. 1～Fig. 4, the 1st example of the four-way switching valve that uses spool of the present invention is described.In this example, be that example describes with the situation that four-way switching valve is applied to air conditioner.
As shown in Figure 1, four-way switching valve 2 roughly comprises: valve body 3 cylindraceous; The connection mouth 6 that is communicated with the discharge tube 5 of compressor 4; The connection mouth 8 that is communicated with the suction pipe 7 of compressor 4; In the both sides that clip this connection mouth 8,2 connection mouths 13,14 that are communicated with the conduit 11,12 that leads to heat exchanger 9,10; And have these connection mouths 8,13,14, and slide the valve seat 16 of bowl-shape spool 1 is arranged, spool 1 slides on valve seat 16, thereby selectively discharge tube 5 is connected with one of conduit 11 or conduit 12.
And, in the inside of valve body 3, between valve seat 16 and key 3a, be provided with piston 17, between valve seat 16 and key 3b, be provided with piston 18, between piston 17,18, be formed with hyperbaric chamber 20.Piston 17,18 is by web 19 one binding movably.And, formed operating chamber 21 between piston 17 and key 3a, and between piston 18 and key 3b formed operating chamber 22, switch pilot valve 25 by conduit 23,24 and four-way and link.Four-way switches pilot valve 25 and is installed between the operating chamber 21,22, thereby constitutes when any one of operating chamber 21,22 is communicated with discharge tube 5 by conduit 26, and another operating chamber is passed through conduit 27 and is communicated with suction pipe 7.
On the valve seat 16 of the inside of valve body 3, be provided with and have the bowl-shape spool 1 that is communicated with the lip part 1b of recess (fluid passage) 1a and ring-type.Spool 1 gently is entrenched in the hole 19a of web 19.Thus, spool 1 is along with piston 17,18 slides on valve seat 16 along moving of the left and right directions of Fig. 1, any one of connection mouth 13,14 of connection mouth 8 and the heat exchange pusher side of its both sides of the low voltage side of the suction pipe 7 that is connected with compressor 4 is communicated with, and the opening portion of another heat exchange pusher side is opened to hyperbaric chamber 20.
As shown in Figure 2, spool 1 comprises: whole by the synthetic resin molding and forming, have at the connection of inside bowl-shaped body 1c with the lip part 1b of recess 1a and ring-type; Constitute, have pole (rod member) 1d of the lip part 1f of rectangle in the two ends one by metal; And as the leaf spring 1e that main body 1c is crimped onto the pushing member on the valve seat 16.By the lip part 1f at two ends being pressed into the stepped part 1g of main body 1c, and will embed the recess 1i of main body 1c, make pole 1d set up the facial 1j of the opening end that becomes to cross main body 1c near the facial 1j of opening end from the outstanding projection 1h of the outer side surface of lip part 1f.Leaf spring 1e forms and overlooks rectangular ring-type, and two end part contact with the upper surface of the lip part 1b of main body 1c.The part of the inboard, two end part of leaf spring 1e bulges into platform shape, reaches its upper surface and web 19 butts and crooked state downwards, and main body 1c is crimped on the valve seat 16.
And, shown in Fig. 2 (c), (d), in the lip part 1b of spool 1, outer circumferential face along the axially outstanding part of pole 1d (below be called " protuberance ") 1k is projected into the position close with the internal face 3c of valve body 3, shown in Fig. 2 (d), its outer circumferential face has radius of curvature R 1 radius of curvature R 2 about equally with the internal face 3c of valve body 3.Thus, gap a between the internal face 3c of the lower end of protuberance 1k and valve body 3, and the gap a ' between the internal face 3c of the outer circumferential face of protuberance 1k and valve body 3 about equally, even to valve body 3 side shiftings, the possibility that contacts with internal face 3c also diminishes spool 1 under the influence of the pressure of fluid.And, when producing on the spool 1 against pressure (fluid flows from the lower direction top of Fig. 2 (d)), when spool 1 floats, the fluid of spool 1 inside is escaped to the upside of spool 1 between lip part 1b and valve seat 16, and since a and a ' about equally, the sectional area of the path escaped of fluid about equally and constant, therefore can prevent the rising of the interior pressure of spool 1.
Therefore in addition, the upper surface of lip part 1b is very roomy, can stably support spool 1 is crimped on leaf spring 1e on the valve seat 16, can push down spool 1 reliably, prevents that fluid is from revealing between spool 1 and the valve seat 16.And, make the outer periphery of leaf spring 1e be positioned at the inboard of outer periphery of the upper surface of lip part 1b, even therefore spool 1 moves, the outer periphery of leaf spring 1e can not contact with the internal face 3c of valve body 3 yet, and leaf spring 1e is difficult for owing to head pressure is out of shape, therefore even for the load of spool 1, be difficult for producing fluid and reveal, the slip that makes spool 1 is along sliding.
And, in this example, shown in Fig. 2 (d), the lip part 1b of main body 1c is done height, make its upper surface be positioned at the position of distance b of the center line top of pole 1d.Product in the past, the center line of pole 1d is positioned at the top of the upper surface of lip part 1b, in contrast to this, the intensity of lip part 1b of the present invention improves, and when pole 1d is pressed into main body 1c, or when the inside and outside generation pressure reduction of main body 1c, main body 1c is difficult for enlarging, so pole 1d difficult drop-off.
As shown in Figure 1, have the four-way switching valve 2 of said structure, be applied on air conditioner, the mobile of refrigeration agent be switched to refrigeration and make warm situation.At this moment, spool 1 is subjected to the pressure of the refrigeration agent of high temperature from exterior circumferential, slides on valve seat 16 with the state that is pressed against valve seat 16.At this moment, as shown in Figure 3, be projected into the position close, improve the mechanical strength of the main body 1c of spool 1 with the internal face 3c of valve body 3 by making protuberance 1k, therefore the external diameter of 2 pole 1d can be run business into particular one, and it is also closer to each other that 2 pole 1d are positioned near the position of valve seat 16.Thus, under discharge tube 5 and state that conduit 11 is communicated with, each the pole 1d not opening surface with suction pipe 7 and conduit 12 is relative, and under discharge tube 5 and state that conduit 12 is communicated with, each the pole 1d not opening surface with suction pipe 7 and conduit 11 is relative.Thus, pole 1d can directly not block flowing of conduit 11,12, and lift off a seat 16 slip surface 16a predetermined distance of pole 1d is above and can not enter the fluid passage inside of the connection of spool 1 with recess 1a, therefore is difficult for becoming the resistance of fluid L3, can guarantee to move along sliding fluid.In addition, as shown in Figure 4, pole 1d also can be 1.
In addition, in above-mentioned example, make the outer circumferential face of the protuberance 1k of spool 1 have radius of curvature R 1 radius of curvature R 2 about equally with the internal face 3c of valve body 3, but the shape of protuberance 1k is not limited thereto, the outer circumferential face of the protuberance 1k of spool 1 not with the scope of the internal face 3c butt of valve body 3 in, can make different shape.
And, in above-mentioned example, the situation that is applied to air conditioner with the four-way switching valve 2 that will have spool 1 of the present invention is that example is illustrated, but except air conditioner, other utilizes the equipment of reversible refrigeration cycle also to be applied to chiller plant etc., in addition, except the machine that utilizes refrigeration cycle, need can also be applied to convection cell to carry out the equipment that four-way switches.
Below, with reference to Fig. 5～Fig. 7, the 2nd example of the four-way switching valve that uses spool of the present invention is described.In these figure, for the constituting component identical with Fig. 1～Fig. 4, the mark prosign, and suitably omit its explanation.Below, be that example describes with the situation of the switching of the refrigerant passage that four-way switching valve is applied to refrigeration cycle.
Four-way switching valve 30 shown in Figure 5, has the basic structure identical with four-way switching valve shown in Figure 12, in the valve body 3 of the cylinder shape of airtight hollow, be provided with the connection mouth 33 of the conduit 32 that the discharge tube 34 with compressor (not shown) links, with the connection mouth 8 that is communicated with the suction pipe 7 of compressor, in the both sides that clip this connection mouth 8, configuration and the conduit 11 that leads to heat exchanger (not shown), 12 2 connection mouths 13 that are communicated with, 14, on valve seat 16, be provided with bowl-shape spool 31 free sliding, this spool 31 is slided, make the connection mouth 8 of central authorities and the connection mouth 13 of both sides selectively, one of 14 connect.
The conduit 32 that discharge tube 34 this four-way switching valve 30 and compressor links, different with conduit 64 shown in Figure 12, one of its feature is: the diameter of bottom 32a is bigger than the diameter of top 32b, and on the 32b of top, be equipped with in pipe and be used for block 32c that discharge tube 34 is positioned, the internal diameter of the bottom 32a also external diameter than discharge tube 34 is big, thus, as described below, can make the space of periphery of the connection mouth 33 of conduit 32 form greatlyyer, the pressure loss of high-pressure refrigerant is diminished.
Below, with reference to Fig. 6, near the shape of the outer circumferential face of, the spool 31 of the connection mouth 33 of the conduit 32 on the valve body 3 that is located in four-way switching valve shown in Figure 5 30, describe with near the difference of the shape of the outer circumferential face of, the spool 74 of the connection mouth 65 of the conduit 64 of four-way switching valve in the past 61 shown in Figure 12.The part that this figure is represented, the with dashed lines that is equivalent to Figure 14 is surrounded as oval-shaped part B.In Fig. 6, judge easily in order to make above-mentioned difference, do not beat hatching ground each parts is charted.And, with the spool 31 of solid line presentation graphs 5 etc., dot in the past spool 74 etc.
As mentioned above, the diameter of the bottom 32a by making conduit 32 is greater than the diameter of top 32b, and as shown in Figure 6, also the internal diameter than conduit 64 is big to make the internal diameter of conduit 32.Thus, also the opening than connection mouth 65 is big to make the opening of connection mouth 33.
Adopt said structure, can make the clearance D of four-way switching valve 30 bigger, can make the smallest cross sectional long-pending (tubular protuberance sectional area) between the outer circumferential face 31m of the periphery of connection mouth 33 of conduit 32 and spool 31 bigger than the gap d of four-way switching valve 61.More particularly, four-way switching valve 30 is characterised in that, makes the long-pending internal diameter sectional area that is equal to or greater than discharge tube 34 of this smallest cross sectional.
Below, as the example that the pressure loss when using above-mentioned spool 31 and spool 74 compares, in Fig. 7, the relation between the tubular protuberance sectional area and the pressure loss is represented.High-voltage tube among this figure is meant the conduit separately 32,64 of spool 31,74, and the high-pressure loss is meant the pressure loss when high-pressure refrigerant flows through high-voltage tube.
As shown in the drawing, can find out, increase along with tubular protuberance sectional area, the pressure loss reduces, when the sectional area of tubular protuberance as this example equates with the internal diameter sectional area of high-voltage tube (being expressed as the product of reduction), compare with four-way switching valve 61 (product in the past) shown in Figure 14, the pressure loss roughly reduces by half.Thereafter, even tubular protuberance sectional area increases, the pressure loss is also faint as to reduce gradually, but at this moment the size of valve body also increases gradually.Therefore, from the size of valve body and reduction by two aspects of the pressure loss, preferably make the internal diameter sectional area (308mm of tubular protuberance sectional area and high-voltage tube
2) equate.
Below, with reference to Fig. 8～Figure 11, the 3rd example of the four-way switching valve that uses spool of the present invention is described.In these figure, for the constituting component identical with Fig. 1～Fig. 7, the mark prosign, and suitably omit its explanation.Below, be that example describes with the situation of the switching of the refrigerant passage that four-way switching valve is applied to refrigeration cycle.
Four-way switching valve 40 shown in Figure 8, has the basic structure identical with four-way switching valve shown in Figure 12, in the valve body 3 of the cylinder shape of airtight hollow, be provided with the connection mouth 33 of the conduit 32 that the discharge tube 34 with compressor (not shown) links, with the connection mouth 8 that is communicated with the suction pipe 7 of compressor, in the both sides that clip this connection mouth 8, configuration and the conduit 11 that leads to heat exchanger (not shown), 12 2 connection mouths 13 that are communicated with, 14, on valve seat 16, be provided with bowl-shape spool 41 free sliding, this spool 41 is slided, make the connection mouth 8 of central authorities and the connection mouth 13 of both sides selectively, one of 14 connect.
Below, with reference to figure 9, to the spool 41 of four-way switching valve shown in Figure 8 40 and near the parts it, and the spool 74 and near the difference of the parts it on size and dimension of four-way switching valve in the past 61 shown in Figure 15 describe.In the figure, judge easily, do not beat hatching ground each parts is charted in order to make above-mentioned difference.And the spool 41 with solid line presentation graphs 8 dots spool 74 in the past.
Compare with spool 74, spool 41 forms valve port footpath (internal diameter of position shown in this figure S1) and waits big, and the whole shape that expands and give prominence to laterally.The difference of this shape and size as shown in figure 10.In Fig. 9, with the spool 41 of solid line presentation graphs 8, and dot in the past spool 74, and, the diameter of the stream end face that the conversion valve port among the figure directly is meant the S0～S4 in the low pressure stream of Fig. 9 when circular.
As shown in figure 10, each size of the size of the inner space of expression valve port footpath and valve all is that spool 41 is bigger, and, in spool 41, have the big part (with reference to S3) of internal diameter S0 of valve relative aperture conduit 12.Thus, fluid valve port and near mobile becoming along sliding, can suppress the pressure loss of fluid that flows through the inside of spool 41 less.In addition, suction pipe 7, conduit 11 and conduit 12 form same shape, have identical internal diameter size.And spool 41 and spool 74 form bilateral symmetry with respect to centre line C L, and the inflow side of the refrigeration agent among Fig. 9 and the valve port of outflow side footpath etc. equates.
As mentioned above, spool 41 is compared with spool 74, can integral body expand outstanding laterally and form be because, as described in the explanation of the 2nd example, on the 32b of the top of conduit 32, in pipe, be equipped with the block 32c that are used to make discharge tube 34 cards to end, and make bottom 32a have the internal diameter bigger than the external diameter of discharge tube 34.Promptly, as shown in Figure 9, adopt such structure, can make the area D (smallest cross sectional between the periphery of the connection mouth 33 of conduit 32 and the outer circumferential face of spool 41 is long-pending) between the outer circumferential face of the periphery of connection mouth 33 of valve body and spool 41 bigger, even it is outstanding that spool 41 is expanded, the pressure loss that also can avoid area D to reduce caused high-pressure liquid becomes big.
Below, as the example that the pressure loss when using above-mentioned spool 31 and spool 74 compares, in Figure 11, the relation between the sectional area in the middle of the valve and the pressure loss is represented.Sectional area is meant the fluid passage of the spool area along the section that comprises the valve neutral position S3 among Fig. 9 and cut open perpendicular to the face (the surperficial θ with respect to valve seat 16 is the faces of 45 degree) of the streamline of refrigeration agent in the middle of the valve.
As shown in figure 11, along with sectional area in the middle of the valve increases, the pressure loss reduces, but sectional area reaches 523mm in the middle of valve
2(1.07 times of sectional area that are equivalent to valve port) afterwards, even sectional area increases in the middle of the valve, the pressure loss does not reduce substantially yet.Therefore, when when reduction by two aspects of the size of spool and the pressure loss are seen, preferably sectional area in the middle of the valve is set at 1.07 times of sectional area of valve port.
In addition, in the above-mentioned the 2nd and the 3rd example, the situation of the switching of the refrigerant passage that four-way switching valve is applied to refrigeration cycle has been carried out expression for example, but also four-way switching valve can be applied to other purposes certainly.
Claims (13)
1. a four-way switching valve spool is used for four-way switching valve, and this four-way switching valve comprises: the valve body with confined space; With the sidepiece binding of this valve body and the 1st conduit that is communicated with described confined space; With the other side binding of described valve body and the 2nd conduit that is communicated with described confined space; Clip the 2nd conduit respectively disposed adjacent in its both sides and the 3rd and the 4th conduit that is communicated with described confined space; Be positioned at described valve body and have the valve seat of the opening portion that is communicated with described the 2nd to the 4th conduit respectively; And the spool that is disposed at this valve seat slidably, by this spool is slided to a direction or another direction, selectively between described the 1st conduit and described the 3rd conduit or the connected state between described the 1st conduit and described the 4th conduit switch, described spool is characterised in that, comprising:
Bowl-shape spool main body;
Opening end near this spool main body sets up the bar-like member that becomes to cross this opening end face facially; And
On the position of the described opening end face of close described spool main body, the lip part integrally formed with this spool main body, this lip part along the axial direction of described bar-like member, is projected into the position near the internal face of described valve body from the outer surface of this spool main body.
2. four-way switching valve spool as claimed in claim 1 is characterized in that, the outer circumferential face of described lip part has the radius of curvature that equates substantially with the radius of curvature of the internal face of described valve body.
3. four-way switching valve spool as claimed in claim 1 or 2 is characterized in that, the center line of described bar-like member is compared with the face with described valve seat opposition side of described lip part, is positioned at the position of more close described valve seat side.
4. as claim 1,2 or 3 described four-way switching valve spools, it is characterized in that, have 2 described bar-like members, these 2 bar-like members are configured to, parallel to each other, and under described the 1st conduit and state that described the 3rd conduit is communicated with, the opening surface with described the 2nd conduit and described the 4th conduit is not relative, under described the 1st conduit and state that described the 4th conduit is communicated with, the opening surface with described the 2nd conduit and described the 3rd conduit is not relative.
5. as claim 1,2 or 3 described four-way switching valve spools, it is characterized in that having 1 described bar-like member, this bar-like member has the rectangular flange portion that contacts with described spool at two ends.
6. four-way switching valve, use each described spool as claim 1 to 5, it is characterized in that, make the long-pending internal diameter sectional area that is equal to or greater than the pipe that is connected with described the 1st conduit of smallest cross sectional between the outer circumferential face of periphery and described spool of connection mouth of described the 1st conduit of described valve body.
7. four-way switching valve as claimed in claim 6 is characterized in that, described the 1st conduit has and the identical axis of described the 2nd conduit, and has the big internal diameter of external diameter than the pipe that is connected with the 1st conduit.
8. as claim 6 or 7 described four-way switching valves, it is characterized in that, this four-way switching valve is used for the refrigerant passage of cooling cycle system is switched, the pipe that is connected with described the 1st conduit is the discharge tube of the employed compressor of this refrigeration cycle, should discharge pipe clamp by the block that is darted at described the 1st catheter interior and end.
9. a four-way switching valve uses each the described spool as claim 1 to 5, it is characterized in that described the 2nd to the 4th conduit has identical internal diameter, and makes the internal diameter of the valve port footpath of described spool more than or equal to the 2nd to the 4th conduit.
10. four-way switching valve as claimed in claim 9 is characterized in that, the sectional area that the fluid passage of described valve core inside is cut open along the face vertical with the streamline of fluid by this fluid passage is more than or equal to the internal diameter sectional area of valve port.
11. as claim 9 or 10 described four-way switching valves, it is characterized in that, make the long-pending internal diameter sectional area that is equal to or greater than the pipe that is connected with described the 1st conduit of smallest cross sectional between the outer circumferential face of periphery and described spool of connection mouth of described the 1st conduit of described valve body.
12., it is characterized in that described the 1st conduit has and the identical axis of described the 2nd conduit as claim 9,10 or 11 described four-way switching valves, and have the big internal diameter of external diameter than the pipe that is connected with the 1st conduit.
13. each described four-way switching valve as claim 9 to 12, it is characterized in that, this four-way switching valve is used for the refrigerant passage of cooling cycle system is switched, the pipe that is connected with described the 1st conduit is the discharge tube of the employed compressor of this refrigeration cycle, should discharge pipe clamp by the block that is darted at described the 1st catheter interior and end.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008204243A JP5175144B2 (en) | 2008-08-07 | 2008-08-07 | Four-way switching valve disc |
| JP2008204243 | 2008-08-07 | ||
| JP2008-204243 | 2008-08-07 | ||
| JP2009045075 | 2009-02-27 | ||
| JP2009-045075 | 2009-02-27 | ||
| JP2009045074 | 2009-02-27 | ||
| JP2009045074A JP2010196857A (en) | 2009-02-27 | 2009-02-27 | Four-way selector valve |
| JP2009045075A JP5249818B2 (en) | 2009-02-27 | 2009-02-27 | Four-way selector valve |
| JP2009-045074 | 2009-02-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101644347A true CN101644347A (en) | 2010-02-10 |
| CN101644347B CN101644347B (en) | 2013-05-01 |
Family
ID=41656346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910165252 Expired - Fee Related CN101644347B (en) | 2008-08-07 | 2009-08-07 | Valve core for four-way switching valve and four-way switching valve thereof |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5175144B2 (en) |
| CN (1) | CN101644347B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537398A (en) * | 2010-12-08 | 2012-07-04 | 浙江三花制冷集团有限公司 | Reversing valve and sliding block of reversing valve as well as frequency conversion air conditioner using reversing valve |
| CN104832677A (en) * | 2014-02-07 | 2015-08-12 | 大金工业株式会社 | Four-way switching valve |
| CN104976376A (en) * | 2014-04-10 | 2015-10-14 | 株式会社鹭宫制作所 | Valve core for flow path switching valve |
| CN107152541A (en) * | 2016-03-03 | 2017-09-12 | 株式会社鹭宫制作所 | Slidingtype switching valve and refrigerating circulation system |
| CN109695738A (en) * | 2017-10-20 | 2019-04-30 | 株式会社鹭宫制作所 | Slidingtype switching valve and refrigerating circulation system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5145396B2 (en) * | 2010-10-08 | 2013-02-13 | 株式会社鷺宮製作所 | Valve body for flow path switching valve |
| JP5663330B2 (en) * | 2011-01-31 | 2015-02-04 | 株式会社不二工機 | Four-way selector valve |
| JP6832299B2 (en) * | 2018-01-19 | 2021-02-24 | 株式会社鷺宮製作所 | Sliding switching valve and refrigeration cycle system equipped with it |
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| JPH11257510A (en) * | 1998-03-06 | 1999-09-21 | Pacific Ind Co Ltd | Four-way selector valve |
| JP2001304438A (en) * | 2000-04-21 | 2001-10-31 | Daikin Ind Ltd | Four way selector valve |
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| US20010004151A1 (en) * | 1998-09-08 | 2001-06-21 | Welch Stephen R. | Unibody binder and the process of making the binder |
| CN1308197A (en) * | 2000-02-10 | 2001-08-15 | 株式会社不二工机 | Four-way converting valve |
| CN101205984A (en) * | 2006-12-19 | 2008-06-25 | 日立空调·家用电器株式会社 | Four-port conversion value and air conditioner using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102537398A (en) * | 2010-12-08 | 2012-07-04 | 浙江三花制冷集团有限公司 | Reversing valve and sliding block of reversing valve as well as frequency conversion air conditioner using reversing valve |
| CN104832677A (en) * | 2014-02-07 | 2015-08-12 | 大金工业株式会社 | Four-way switching valve |
| CN104832677B (en) * | 2014-02-07 | 2017-06-30 | 大金工业株式会社 | Four tunnel switching valves |
| CN104976376A (en) * | 2014-04-10 | 2015-10-14 | 株式会社鹭宫制作所 | Valve core for flow path switching valve |
| CN107152541A (en) * | 2016-03-03 | 2017-09-12 | 株式会社鹭宫制作所 | Slidingtype switching valve and refrigerating circulation system |
| CN109695738A (en) * | 2017-10-20 | 2019-04-30 | 株式会社鹭宫制作所 | Slidingtype switching valve and refrigerating circulation system |
| CN109695738B (en) * | 2017-10-20 | 2020-06-05 | 株式会社鹭宫制作所 | Sliding type switching valve and refrigeration cycle system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101644347B (en) | 2013-05-01 |
| JP2010038320A (en) | 2010-02-18 |
| JP5175144B2 (en) | 2013-04-03 |
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