CN104033389A - Compressor assembly and refrigeration cycle device with same - Google Patents
Compressor assembly and refrigeration cycle device with same Download PDFInfo
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- CN104033389A CN104033389A CN201410274433.6A CN201410274433A CN104033389A CN 104033389 A CN104033389 A CN 104033389A CN 201410274433 A CN201410274433 A CN 201410274433A CN 104033389 A CN104033389 A CN 104033389A
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Abstract
The invention discloses a compressor assembly and a refrigeration cycle device with the same. The compressor assembly comprises a compressor, a liquid storage device, a by-pass pipe and a control valve, wherein one end of the by-pass pipe stretches into an oil storage cavity, and the other end of the by-pass pipe is communicated with a container; the control valve is arranged on the by-pass pipe so as to open or close the by-pass pipe. According to the compressor assembly disclosed by the embodiment of the invention, the oil output capacity to the refrigeration cycle, generated after the compressor is started or during the instable defrosting operation, can be substantially decreased; meanwhile, after the compressor is started, lubricating oil in the liquid storage device can rapidly return to the compressor, so that the failure rate of the reliability of the compressor, caused by the insufficient oil capacity can be improved; besides, the oil output capacity is decreased, so that the time spent on achieving a refrigeration cycle is shortened, and the starting speed of the device is increased.
Description
Technical field
The present invention relates to refrigerating field, especially relate to a kind of compressor assembly and there is its freezing cycle device.
Background technique
Housing is that after on high-tension side rotary compressor is shut down, the refrigerant in system can condensation deposits in the refrigerant dissolving in compressor bottom and lubricant oil and can make the pasta in compressor raise.
And, when compressor start simultaneously, the cold medium flux in compressor housing is maximum, thus now freeze cycle to tell oil mass temporarily maximum.When oil mass that what this was too drastic tell is stable operation more than 10 times.
On the other hand, the lubricant oil spuing circulates one week in freeze cycle, before liquid-storage container is got back to compressor, needs the more than several minutes time, has postponed the time that in compressor, oil mass is recovered.Its main cause is: the length of pipe of (1) freeze cycle and the high drop of indoor set outdoor unit; (2) liquid-storage container has not only been caught from liquid refrigerants out of vaporizer but also caught the nearly all lubricant oil that circulates and return for one week simultaneously freeze cycle.Oil mass while causing compressor start like this and pasta reduce, and the delay that recovers of the inner oil mass of compressor after starting, and can the serious reduction of induced to compressor reliability etc. problem.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of technical problem in correlation technique.
For this reason, one object of the present invention is to propose a kind of compressor assembly, and the compressor reliability rate of fault causing due to the reason of low on fuel can improve.
Another object of the present invention is to propose a kind of freezing cycle device with above-mentioned compressor assembly.
According to the compressor assembly of the embodiment of the present invention, comprising: compressor, described compressor comprises housing and compressor pump body, and the bottom of described housing is provided with shoe cream room, and described compressor pump body is located in described housing; Liquid-storage container, described liquid-storage container comprises container and low-voltage tube, and described low-voltage tube is communicated with described compressor pump body and described container, and the lower end of the part that is positioned at described container of described low-voltage tube is provided with the first oilhole; Bypass tube, one end of described bypass tube extend in described shoe cream room, and the other end of described bypass tube is communicated with described container; Control valve, described control valve is located on described bypass tube to open or close described bypass tube.
According to the compressor assembly of the embodiment of the present invention, the telling oil mass and can significantly reduce freeze cycle producing after compressor start or in the bumpy running of defrosting running.After compressor start, guarantee that the lubricant oil in liquid-storage container can promptly be got back in compressor, so the compressor reliability rate of fault causing due to the reason of low on fuel can improve simultaneously.In addition, tell the reduction of oil mass, can shorten so arrive the stable time of freeze cycle, the speed that device starts can accelerate.
In addition, compressor assembly according to the above embodiment of the present invention can also have following additional technical characteristics:
In some embodiments of the invention, described control valve is solenoid valve.
In other embodiments of the present invention, described control valve is pressure difference valve.
According to some embodiments of the present invention, the upper end of the part that is positioned at described container of described low-voltage tube is provided with the second oilhole.
Preferably, described the first oilhole and described the second oilhole are respectively multiple.
According to the freezing cycle device of the embodiment of the present invention, comprise compressor assembly according to the above embodiment of the present invention.
Brief description of the drawings
Fig. 1 is relevant to embodiments of the invention 1, represents the freezing cycle device including rotary compressor;
Fig. 2 is relevant to embodiment 1, the compressor before expression starts and internal structure and the bypass circulation of liquid-storage container;
Fig. 3 is relevant to embodiment 1, the compressor after expression starts and the oil mass of liquid-storage container;
Fig. 4 is relevant to embodiment 1, represents that compressor stops the pressure reduction variation of front and back;
Fig. 5 is relevant to embodiment 1, the compressor after expression starts and the oil mass of liquid-storage container, and wherein upside oilhole has been appended on the top of low-voltage tube;
Fig. 6 is relevant to embodiments of the invention 2, represents the configuration of pressure difference valve;
Fig. 7 is relevant to embodiment 2, represents the internal structure of pressure difference valve;
Fig. 8 is relevant to embodiment 2, represents the internal structure of pressure difference valve;
Fig. 9 is relevant to embodiments of the invention 2, represents the freezing cycle device including 2 rotary compressors;
Figure 10 is relevant to embodiment 3, represents the internal structure of liquid-storage container.
Embodiment
Describe embodiments of the invention below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment who is described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of instructions such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, First Characteristic Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
Describe in detail according to the compressor assembly of the embodiment of the present invention below with reference to accompanying drawing, this compressor assembly such as can be applied in the freezing cycle device such as air conditioner, water heater.Wherein, compressor can be single cylinder rotary compressor, twin-tub rotation-type compressor or scroll compressor etc.
According to the compressor assembly of the embodiment of the present invention, comprising: compressor, liquid-storage container 10, bypass tube 20 and control valve.Wherein, compressor comprises housing 2 and compressor pump body 5, and the bottom of housing 2 is provided with shoe cream room 7, and compressor pump body 5 is located in housing 2.In the example of Fig. 2 and Fig. 3, compressor is twin-tub rotation-type compressor, compressor pump body 5 comprises two cylinder 40a, 40b and is located at two central diaphragms 41 between cylinder, suction pipe 9 is communicated with two cylinder 40a, 40b, suction pipe 9 is fixed on central diaphragm 41, but it should be noted that, suction pipe 9 can also be fixed on cylinder 40a or cylinder 40b.
Certainly be worth understanding, be also provided with outlet pipe 3 on compressor, compressor pump body 5 also comprises the elements such as eccentric shaft 50, main bearing 55, supplementary bearing 58, main bearing silencing apparatus 56 and supplementary bearing silencing apparatus 59 simultaneously.The working principle of compressor etc. is those skilled in the art to be known, and is not just described in detail here.
Liquid-storage container 10 comprises container 11 and low-voltage tube 12, low-voltage tube 12 is communicated with compressor pump body 5 and container 11, the lower end of the part that is positioned at container 11 of low-voltage tube 12 is provided with the first oilhole 13 (being following oilhole 13), and the liquid coolant and the oil 8 that are stored in liquid-storage container 10 are expelled back in compressor pump body 5 by the first oilhole 13.In the example of Fig. 2 and Fig. 3, at least a portion of low-voltage tube 12 is positioned at container 11 and low-voltage tube 12 is communicated with to make compressor pump body 5 and container 11 to be communicated with suction pipe 9, and the liquid coolant and the oil 8 that are stored in liquid-storage container 10 are entered in low-voltage tube 12 and are expelled back in compressor pump body 5 by low-voltage tube 12 by the first oilhole 13.Preferably, the first oilhole 13 can be multiple, so that liquid coolant and oil 8 are expelled back in compressor pump body 5 by the first oilhole 13.
One end of bypass tube 20 extend in shoe cream room 7, the other end of bypass tube 20 is communicated with container 11, particularly, the both ends open of bypass tube 20 is to form oil supply hole 22a and to tell oilhole 22b, and one end of bypass tube 20 extend in housing 2 to make oil supply hole 22a be positioned at shoe cream room 7.It should be noted that, " connection " during the other end of bypass tube 20 is communicated with container 11 should make broad understanding, can be that bypass tube 20 is directly communicated with for example the other end of bypass tube 20 with container 11 and extend in container 11, or the other end of bypass tube 20 be communicated with container 11 by intermediate medium on the pipeline between vaporizer and the liquid-storage container 10 that for example the other end of bypass tube 20 is connected to freezing cycle device.
Control valve is located on bypass tube 20 to open or close bypass tube 20.As long as wherein control valve can be formed as structure arbitrarily and can open or close according to demand bypass tube 20, for example control valve can be solenoid valve 25, and control valve can also be pressure difference valve 30.
That is to say, between the shoe cream room 7 and liquid-storage container 10 of compressor 80, connected the bypass tube 20 that possesses for example solenoid valve 25 of control valve.Compressor 80 is before and after entrys into service, after control valve is opened, due to the pressure reduction of the both ends open portion of bypass tube 20, be oil supply hole 22a and tell between oilhole 22b and have pressure reduction, when the oil 8 of shoe cream room 7 flows out to liquid-storage container 10, the pasta of shoe cream room 7 is reduced to N from H, completes the initialization of pasta.Therefore, the telling oil mass and can reduce freeze cycle from outlet pipe 3.In liquid-storage container 10, the oil 8 of storage is got back to shoe cream room 7 from the first oilhole 13, so the oil mass of shoe cream room 7 and pasta can recover rapidly.
According to the compressor assembly of the embodiment of the present invention, the telling oil mass and can significantly reduce freeze cycle producing after compressor start or in the bumpy running of defrosting running.After compressor start, guarantee that the lubricant oil in liquid-storage container 10 can promptly be got back in compressor, so the compressor reliability rate of fault causing due to the reason of low on fuel can improve simultaneously.In addition, tell the reduction of oil mass, can shorten so arrive the stable time of freeze cycle, the speed that device starts can accelerate.
In specific embodiments of the invention, the other end of bypass tube 20 extend in liquid-storage container 10 and is positioned at liquid-storage container 10 to make telling oilhole 22b.Preferably, tell oilhole 22b and be positioned at the upper space of liquid-storage container 10, the contiguous central diaphragm 41 of oil supply hole 22a arranges, and now height and central diaphragm 41 height housing 2 in of oil supply hole 22a in housing 2 is roughly equal.
In some embodiments of the invention, pressure difference valve 30 comprises: valve casing 70 (being following sealed cylindrical housing 70), valve seat 61, slide-valve 65 and elastic component 68.Valve seat 61 is located in valve casing 70 and valve seat 61 is provided with through hole.Slide-valve 65 the rest position coordinating with through hole and and through hole depart between the release position coordinating and be located at movably in valve casing 70, the periphery wall of slide-valve 65 is provided with multiple isolated blades 67, each blade 67 is slidably matched with the inwall of valve casing 70, limits the flow channel of refrigerant and oil 8 between adjacent blades 67 simultaneously.In other words, in the time of rest position, slide-valve 65 coordinates to cut out bypass tube 20 with through hole, and in release position, slide-valve 65 departs from and coordinates to open bypass tube 20 with through hole.
The two ends of elastic component 68 are only against respectively on valve seat 61 and slide-valve 65 and move towards release position often to promote slide-valve 65.Preferably, elastic component 68 is coil spring.
Particularly, as oil supply hole 22a with tell pressure difference between oilhole 22b while being greater than the elastic force of elastic component 68, slide-valve 65 coordinates to cut out bypass tube 20 with through hole, as oil supply hole 22a with tell pressure difference between oilhole 22b while being less than the elastic force of elastic component 68, slide-valve 65 and through hole depart from while cooperation to open bypass tube 20.Thereby make the simple in structure of pressure difference valve 30.
In some embodiments of the invention, as shown in Figure 5, the upper end of the part that is positioned at container 11 of low-voltage tube 12 is provided with the second oilhole 18 (being following upside oilhole 18).Wherein upside oilhole 18 is to offer for the oil above floating on liquid refrigerants 29, due to the superposition of the first oilhole 13, can make the oil return of the oil 8 to housing 2 faster simultaneously.Wherein the second oilhole 18 can be one or more, is not specifically limited here.
According to some embodiments of the present invention, liquid-storage container 10 is one, and compressor is that multiple and each compressor is communicated with liquid-storage container 10 by a bypass tube 20, and each bypass tube 20 is provided with control valve.
Particularly, as shown in figure 10, liquid-storage container 10 also comprises dividing plate 32, dividing plate 32 is located at the bottom of container 11 the space in container 11 is divided into upper chamber and shunting chamber 33, low-voltage tube 12 comprises inner tube and multiple connecting tube, the lower end that inner tube is positioned at upper chamber and inner tube is connected to make upper chamber and shunting chamber 33 to be communicated with dividing plate 32, that is to say, upper chamber and shunting chamber 33 are by inner tube conducting.The first oilhole 13 is positioned in inner tube, and multiple connecting tubes are located at respectively on the outer side wall of container 11 and with shunting chamber 33 and are communicated with, and multiple connecting tubes are connected with the suction pipe 9 of multiple compressors respectively.
According to the freezing cycle device of the embodiment of the present invention, comprise compressor assembly according to the above embodiment of the present invention.
The freezing cycle device with compressor assembly of describing three specific embodiments according to the present invention below with reference to Fig. 1-Figure 10, freezing cycle device can be air-conditioning, refrigerating plant and water heater etc.
Embodiment 1:
Fig. 1, taking the air-conditioning of changes in temperature pattern as example, represents the formation of the freezing cycle device that comprises two-cylinder type rotary compressor 80.
The high pressure refrigerant of discharging from the outlet pipe of rotary compressor 80 flows to indoor heat exchanger 102 from four-way valve 101, become low pressure refrigerant at expansion valve 103, pass through four-way valve 101 from outdoor heat exchanger 104, press the sequential flowing of liquid-storage container 10, suction pipe 9, be drawn in rotary compressor 80 pump housing portions 5 (Fig. 2).Like this, freezing cycle device is heating mode, the high pressure side that the internal pressure of the housing 2 of rotary compressor 80 is freeze cycle.In addition, expansion valve 103 can be also capillary tube.In addition, in single cold air-conditioning, can omit four-way valve 101.
Between the shoe cream room (symbol 7 of Fig. 2) that the bottom of embodiment's 1 middle shell 2 possesses and liquid-storage container 10, be provided with bypass tube 20, the solenoid valve 25 that it is carried out to switch control is arranged on the middle part of bypass tube 20.And liquid-storage container 10 can be fixed on housing 2, also can separate and arrange with compressor.But, having omitted in the freezing cycle device of four-way valve 101, do not adopt liquid-storage container 10 and in the suction loop 36 that connects vaporizer (being equivalent to indoor heat exchanger 102) and low-pressure inlet pipe 16 connecting bypass pipe 20 also passable.
Fig. 2 represents the cross section of the rotary compressor 80 and the liquid-storage container 10 that form above-mentioned freeze cycle.The pasta of housing 2 represents by symbol in addition.The lubricant oil 8 (hereinafter to be referred as oily 8) of enclosing in shoe cream room 7 that rotary compressor 80 is possessed by the bottom of the stator 6a of storage in closed shell 2 and the motor 6 that form of rotor 6b, the compressor pump body 5 driving by motor 6, housing 2, shoe cream room 7 forms.
Shoe cream room 7 is internal volume parts of the scope (symbol Y) main bearing silencing apparatus 56 fixing from the bottom of housing 2 to main bearing 55, the just in time horizontal position of is-symbol Y.But the refrigerant dissolving in shoe cream room 7 oil 8 and the liquid refrigerants of delay can make pasta increase, finally make fuel head in compressor can significantly exceed the scope of shoe cream room 7.
Piston (without diagram) in central diaphragm 41 that compressor pump body 5 arranges by 2 cylinder 40a and cylinder 40b, in the middle of their and separately cylinder, carry out eccentric shaft 50 that eccentric revolution drives, to this eccentric shaft 50 carry out sliding support main bearing 55 and supplementary bearing 58, possess the formation such as main bearing silencing apparatus 56 and supplementary bearing silencing apparatus 59 wherein.After the assembling of compressor pump body 5 completes, the periphery of main bearing 55 (flange part) is welded on the inner radius of housing 2, fixing to compressor pump body 5.The flange part of main bearing 55 has several through holes, so the oil dropping on main bearing 55 can be got back in shoe cream room 7.
Here, the refrigerant of rotary compressor 80 is flowed and carries out simple explanation.
Start to be connected to from liquid-storage container 10 low pressure refrigerant and the oil content that the sucking pipe 9 of central diaphragm 41 is drawn into compressor pump body 5 and flow in cylinder 40a and cylinder 40b, become high pressure refrigerant after compressed, discharge to main bearing silencing apparatus 56 and supplementary bearing silencing apparatus 59 respectively.
The liquid-storage container 10 of the side assembling of housing 2 is general universal structures, is fixed on gas-liquid separation plate 14, the filter screen 15 of the inner radius of container 11, the low-pressure inlet pipe 16 that connects its upper end forms on the upright low-voltage tube 12 in the hydrostatic column 11 center of sealing and this top.The low-voltage tube outlet 17 of the lower end of low-voltage tube 12 is fastened on the suction pipe 9 on the central diaphragm 41 of compressor pump body 5.
In the bottom of low-voltage tube 12, be provided with the oilhole 13 that the inside of container 11 is offered.This oilhole 13 is to make the liquid refrigerants and the oil that in container 11, accumulate flow to the hole in low-voltage tube 12.The rotary compressor carrying in the domestic air conditioning of standard, the general 1.5mm of diameter of oilhole 13, its opening area are 1.6% left and right of low-voltage tube (internal diameter 12mm), very little.In addition, if oilhole is excessive, the liquid cooling matchmaker's who accumulates in liquid-storage container discharge is too much, can produce the problem that the viscosity of the oil 8 of shoe cream room 7 significantly reduces.
The oil supply hole 22a of bypass tube 20 lower ends of L word shape in shoe cream room 7, near the height perforate central authorities of central diaphragm 41, upper end tell near the oilhole 22b perforate upper end of low-voltage tube 12.In addition, bypass tube 20 middle parts have configured solenoid valve 25.Therefore, when the pressure of the pressure ratio liquid-storage container 10 of housing 2 is high, or the pressure ratio of oil supply hole 22a is told the pressure of oilhole 22b high time, opens solenoid valve 25, and the oil 8 of shoe cream room 7 can flow out to liquid-storage container 10 from telling oilhole 22b by bypass tube 20 from oil supply hole 22a.When but the pasta of the oil 8 of shoe cream room 7 is lower than the position of oil supply hole 22a, the gaseous coolant of housing 2 can flow out in liquid-storage container 10.
Next, the fuel head of shoe cream room 7 is described.After startup through more than 10 minutes, when freeze cycle stable (steady running condition), fuel head normally near the central authorities of central diaphragm 41 (N) be stable near the scope of the central authorities (H) of cylinder 40a.This is to compressor pump body 5 fuel feeding and lubricates all more useful pasta.But pasta than (M) near the central authorities of cylinder 40b also low words can cause the performance of compressor to reduce.
After compressor start or under bumpy running condition, may make pasta low to below M height.Along with pasta (flange lower end surface of supplementary bearing 58) from M to L reduces, due to the lack of lubrication to compressor pump body 5, slip component probability of malfunction uprises.Therefore from the viewpoint of Performance And Reliability, pasta will be more than M.
In addition; in the process of the long-term shutdown of compressor; the temperature of compressor is than the low words of temperature of indoor heat exchanger 102, outdoor heat exchanger 104; almost most of refrigerant in freezing cycle device is concentrated in compressor internal condensation, so compressor pasta can rise to Z above (refrigerant soak phenomenon).In this refrigerant soak state, start compressor, to tell oil mass maximum, and need the long period just can get back in compressor, the inner pasta of compressor is reduced to M or below L, compressor is in dangerous state.
The aperture position of the oil supply hole 22a of bypass tube 20 and the position consistency of pasta N in embodiment 1.But this is to consider when fuel head and cold medium flux are maximum after compressor start that pasta reduces, the oil 8 of shoe cream room 7 and fuel head thereof are pro rata to the telling oil mass and can increase of freeze cycle, and the pasta after normal operation is stable in the scope of N or M.
If therefore set N for, consider to M that below pasta described later can recover rapidly even if pasta is low, also there is surplus reliability aspect.But need to carry out real machine confirmation according to the operating condition in the bodyguard sample of freezing cycle device, compressor or market, the aperture position of oil supply hole 22a is optimized.
Next, embodiment 1 pasta controlling method is described.
First, before compressor start or after starting, by opening solenoid valve 25, pasta can the low position to N.The feature of the method is to open solenoid valve 25 have pressure reduction between oil supply hole 22a and oil drainage hole 22b in, and the oil 8 that exceedes predefined pasta (N) is moved on in liquid-storage container 10.Be the low position to N of pasta of shoe cream room 7, on the other hand, the oil mass moving in liquid-storage container 10 can temporarily be stored.Its result, the change of state from Fig. 2 to Fig. 3.But as above-mentioned, if there is no pasta more than N, the gas coolant of housing 2 can flow out in liquid-storage container 10.No matter which kind of occasion, the pasta of shoe cream room 7 can not exceed setting value N.
Like this: 1. the pressure ratio of oil supply hole 22a is told the high time period of pressure of oilhole 22b, opens solenoid valve 25; 2. make the pasta of shoe cream room 7 lower than the height of oil supply hole 22a; 3. the oil mass that reduces pasta part in while shoe cream room 7 accumulates in liquid-storage container 10, is called [initialization of pasta] or [initialization].
Fig. 4 represents that the compressor from the entry into service of left side stops (STOP) thereafter, the passing of the pressure reduction (Δ P) when the compressor in stopping starts (START) again.At this, Δ p is the oil supply hole 22a and the pressure reduction of telling oilhole 22b of the both ends open portion of bypass tube 20,
Δ P=P
oil supply hole 22a-P
tell oilhole 22b.
For example: in air conditioner (using refrigerant R410A), pressure reduction (Δ P1) before compressor stops is 1.0～2.0Mpa left and right, pressure reduction (Δ P2) after compressor stops will reach balance pressure approximately needs 3 minutes, thereafter, compressor is restarted pressure reduction (Δ P3) increases rapidly.And Δ P > 0.01Mpa, has enough pressure reduction that the oil 8 of shoe cream room 7 is flow in liquid-storage container 10.
Stopping random time at compressor is all the time period of opening solenoid valve 25, but relatively good from initialized object is seen approaching stopping.In addition, 1 point after stopping or 1 point 30 seconds are for well.Words after startup when can, but the expansion-loss again of the large words pressurized gas of △ P can increase, so after startup 3～5 seconds, solenoid valve 25 cuts out relatively good.On the other hand, the time period of shut electromagnetic valve 25, after starting, no matter pressure difference how, complete implement after the initialization of pasta just passable.
According to Fig. 4 and above-mentioned explanation, open the method for solenoid valve 25 for the initialization of pasta and can select following 4 kinds:
(1) compressor stop front or stop after;
(2) after compressor start;
(3) compressor stop front or stop after and after the startup of compressor;
(4) rotating speed of the motor 6 after compressor start or before stopping;
According to above arbitrary selection, open solenoid valve 25, next, above-mentioned 4 methods are carried out to concrete case explanation.
(1) compressor carries out initialization before and after stopping.
Compressor stop front or stop after one minute till because there is enough pressure reduction, be just through with so open the rear initialization of solenoid valve 25.After initialization completes in addition, solenoid valve 25 just can cut out, even but the state of opening is also passable.
(2) initialization after compressor start.
In compressor start, or just complete initialization open solenoid valve 25 from startup starts the several seconds after.,, after shut electromagnetic valve 25, just start common compression rapidly thereafter.And even opening in the time period of solenoid valve 25, the coolant quantity that spues of compressor pump body 5 is enough large with respect to oil mass or coolant quantity by bypass tube 20, so the pressure of housing 2 can rise.
(3) before and after compressor stops or after starting, both carry out initialization.
This is the initial method that repeats (2) after (1).In long-term shutdown such as compressor, though as described in there is the refrigerant soak phenomenon to housing 2, also can carry out the initialization of pasta.
(4) carry out initialization according to the motor speed after compressor start or before stopping.
The method is applicable to the rotary compressor of the variable-frequency motor that carries speed variable.The compressor that carries variable-frequency motor, for avoiding telling oil mass and sucking the object such as liquid coolant sharply, can improve gradually rotating speed after startup.In addition, room temperature arrives after setting value compressor shutdown, and rotating speed is minimum, and (4) are in initialized method of these time periods.
Its result is before increasing rotating speed, and initialization completes, so can control the oil mass of telling oil mass, guaranteeing compressor.In addition, the initialization of compressor finishes, and rotating speed can increase and exceedes in the past, so can have the effect of shortening the starting time of freeze cycle.Certainly, also can adopt above-mentioned (1) to arrive the method for (3) even carry the compressor of variable-frequency motor.
In the initial method of above-mentioned pasta, the feature of opening the method for solenoid valve 25 before compressor stops or after stopping is that the pressure balance time of freeze cycle is shortened.Therefore, the compressor time of restarting can shorten.
Next, the pasta initialization of compressor in defrosting running is described.
When getting back to greenhouse running when being switched to defrosting running (cold-room pattern) from greenhouse running or from defrosting running, need to suspend compressor and again start.Utilize this to stop and again starting, can carry out initialization by arbitrary method in above-mentioned (1) to (4).Its result, tell oily phenomenon and the pasta that sharply worsen to the freeze cycle that when above-mentioned operation mode switches, occur reduce controlledly, can promptly recover the inner pasta of compressor simultaneously.
In compressor operation, the liquid refrigerants 29 accumulating in liquid-storage container 10 can not evaporate and stay after startup stops.Under such condition, carry out initialized words, flowing to liquid coolant 29 in the oil 8 of liquid-storage container 10 inside can not dissolve, and temporarily has liquid coolant 29 floatings to have the phenomenon of oil 8.In addition, also can there is same phenomenon when the lubricant oil of use and the immiscible property of refrigerant.
Start compressor in such time period, the oil of discharging from oilhole 13 can reduce.As this countermeasure, append upside oilhole 18 on the top of low-voltage tube 12 as shown in Figure 5.Upside oilhole 18 is to offer for the oil floating on above-mentioned on liquid refrigerants 29, due to the superposition of oilhole 13, can make the oil return of the oil 8 to housing 2 faster simultaneously.In addition, according to necessity, can increase the quantity of oilhole 13.
Embodiment 2:
For switch bypass tube 20, embodiment 1 can adopt solenoid valve 25, in the time period before and after compressor start, carries out any switching manipulation, has such advantage.But, need control and the distribution of solenoid valve 25.Embodiment's 2 use pressure difference valve 30 carry out replacement of solenoid valve 25, there is equally the feature of pasta being carried out to auto-initiation.
As shown in Figure 6, pressure difference valve 30 is set in the middle of bypass tube 20.Fig. 7 and Fig. 8, represent the structure of pressure difference valve 30 and the action of slide-valve 65.Pressure difference valve 30 possess can be mobile in the vertical direction in sealed cylindrical housing 70 slide-valve 65, be fixed on valve seat 61, coil spring 68 on circular cylindrical shell 70.
In Fig. 7, slide-valve 65 is at the conus portion switch valve seat 61 of tip, and 4 blades 67 that possess in the external diameter of cylindrical part, keep the interior Zhou Yidong of slide-valve 65 along circular cylindrical shell 70.In addition, be also oil 8 and refrigerant flow channel.The A chamber 60a that the bottom of slide-valve 65 possesses is suitable with the interior pressure of housing 2, and the B chamber 60b that the top of slide-valve 65 possesses is suitable with the pressure of liquid-storage container 10.
Fig. 7 is the halted state of compressor, and the pressure of A chamber 60a and B chamber 60b has reached balance.This balance pressure is Pm.After 2 cavity pressure balances, due to the elastic force of coil spring 68, the limited plate 62 of slide-valve 65 is fixing.
Fig. 8 is the state in compressor operation, and the pressure of A chamber 60a is that the pressure of Pd, the B chamber 60b suitable with the pressure of housing 2 is the Ps suitable with the low pressure of liquid-storage container 10.Therefore, the pressure (Ps) of the pressure of A chamber 60a (Pd) > B chamber 60b.Because this pressure reduction slide-valve 65 is in the playback of the top of valve seat 61.
Next, the action of slide-valve 65 is described.
After compressor in running stops, the pressure of housing 2 and liquid-storage container 10 all change gradually towards the directional pressure of balance pressure (Pm), conventionally reach balance pressure 2～3 points of left and right.Due to the variation of this pressure, the pressure of the pressure of A chamber 60a and B chamber 60b changes pressure reduction towards the direction of balance pressure (Pm) gradually and can reduce.
In the process reducing at pressure reduction, because pressure reduction is less than the elastic force of coil spring 68 to the active force of slide-valve 65, slide-valve 65 will be lifted off a seat and 61 be resembled the state in standard-sized sheet Fig. 6.This moment, due to remaining pressure reduction, the superfluous oil 8 of shoe cream room 7 flows in liquid-storage container 10 by pressure difference valve 30, so completed the initialization of pasta.Its rear case 2 and liquid-storage container 10 reach balance pressure.
Compressor is restarted, and the part in the gaseous coolant of housing 2 flows out in liquid-storage container 10 by bypass tube 20.At this moment, the pasta of the shoe cream room 7 in shutdown can rise, and oil 8 can flow in liquid-storage container 10, and the initialization of the 2nd time has completed.Compressor, when oil 8 flows out, can increase the pressure of housing 2, so slide-valve 65 starts action, pressure difference valve 30 is closed.,, proceed to common compression operation thereafter.Like this, the initialized method of pasta that embodiment 2 is undertaken by pressure difference valve 30 is identical with embodiment 1 (3), can obtain same effect.
Embodiment 3:
As shown in Figure 9, embodiment 3 is applied in the freezing cycle device that above-mentioned announcement technology is made up of several rotary compressors.Freezing cycle device is made up of rotary compressor 120, rotary compressor 130, four-way valve 101, indoor heat exchanger 102, expansion valve 103, outdoor heat exchanger 104, liquid-storage container 10c, 2 one-way valve 105c and 105d.Wherein rotary compressor 120 and rotary compressor 130 are following compressor A and compressor B.
The suction pipe 9c of 2 compressors and suction pipe 9d are connected respectively on the low-voltage tube 34c and low-voltage tube 34d possessing in liquid-storage container 10c.In addition, be provided with solenoid valve 25c and solenoid valve 25d in the centre of 2 bypass tube 20c to each compressor shoe cream room 7 (without diagram) and liquid-storage container 10c opening and bypass tube 20d.In the shoe cream room 7 that in addition, as described in Example 1, each compressor possesses bottom housing 2c and housing 2d, lay in oil 8 (without diagram).
In liquid-storage container 10c shown in Figure 10, the shunting chamber 33 that forms by dividing plate 32,2 low-voltage tube 34c and low-voltage tube 34d are connected.In addition, 2 bypass tube 20c and bypass tube 20d have been connected on the top of container 11.Oil 8 represents to flow out the situation of being caught by container 11 from these bypass tubes.In addition, bypass tube 20c also can be connected in low tension loop 36.
Flow into the low pressure refrigerant the low-pressure inlet pipe 16 that liquid-storage container 10c upper end portion possesses from outdoor heat exchanger 104, after gas-liquid separation plate 14, liquid refrigerants accumulates in container 11, gaseous coolant is diverted to low-voltage tube 34c and low-voltage tube 34d by shunting chamber 33 from low-voltage tube 12, arrives in the suction pipe 9c and suction pipe 9d of each compressor.
In 2 compressor A and B in this running, when compressor A stops, only has compressor B from suction pipe makeup oil 8.But compressor A stops front opening solenoid valve, oil 8 superfluous in compressor A can flow out in liquid-storage container 10c, and pasta is carried out to initialization.Superfluous oil 8 is trapped in liquid-storage container 10c in addition, so the compressor B in running can utilize the oil 8 of liquid-storage container 10c.Compressor A in shutting down is on the other hand because the initialization of pasta is over, so when restarting, can control the too drastic oil of telling to freeze cycle.
In addition, before the compressor A in shutdown restarts, the compressor B in running opens solenoid valve, carries out the initialized words of pasta, the compressor A safe oil mass that can increase sharply.In addition, 2 compressor A and B in running can carry out initialization at short time switch electromagnetic valve, and the oil 8 of catching in liquid-storage container 10c can be total by 2 compressors, can control safe oil mass in compressor operation and be not partial to the compressor of any side.
When 2 compressor A in stopping and B start also as described in Example 1, by the initialization of pasta, the too drastic oil of telling can prevent from starting time.Common several compressor is starting or stoping by certain hour is poor separately.Even in this case, the pressure of liquid-storage container 10c can be usually not high than the housing pressure of compressor, so each compressor can be implemented the initialization of pasta.
Embodiment 3 represents to have a liquid-storage container by 2 compressors like this, can obtain the system that reliability is higher.Embodiment 3 is the cases that use 2 compressors in freezing cycle device, can apply too the present invention but more compressor has 1 or several liquid-storage container.
For the object of reliability that improves rotary compressor and system, carry in air-conditioning, refrigerating plant and the water heater etc. of these compressors and also can be used widely.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And, specific features, structure, material or the feature of description can one or more embodiments in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiments that describe in this specification or example and different embodiment or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, amendment, replacement and modification.
Claims (6)
1. a compressor assembly, is characterized in that, comprising:
Compressor, described compressor comprises housing and compressor pump body, and the bottom of described housing is provided with shoe cream room, and described compressor pump body is located in described housing;
Liquid-storage container, described liquid-storage container comprises container and low-voltage tube, and described low-voltage tube is communicated with described compressor pump body and described container, and the lower end of the part that is positioned at described container of described low-voltage tube is provided with the first oilhole;
Bypass tube, one end of described bypass tube extend in described shoe cream room, and the other end of described bypass tube is communicated with described container;
Control valve, described control valve is located on described bypass tube to open or close described bypass tube.
2. compressor assembly according to claim 1, is characterized in that, described control valve is solenoid valve.
3. compressor assembly according to claim 1, is characterized in that, described control valve is pressure difference valve.
4. compressor assembly according to claim 1, is characterized in that, the upper end of the part that is positioned at described container of described low-voltage tube is provided with the second oilhole.
5. compressor assembly according to claim 4, is characterized in that, described the first oilhole and described the second oilhole are respectively multiple.
6. a freezing cycle device, is characterized in that, comprises according to the compressor assembly described in any one in claim 1-5.
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| CN201410274433.6A CN104033389A (en) | 2014-06-18 | 2014-06-18 | Compressor assembly and refrigeration cycle device with same |
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| CN111322240A (en) * | 2020-02-03 | 2020-06-23 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigerating system with same |
| CN112412790A (en) * | 2019-08-23 | 2021-02-26 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigeration cycle device |
| CN112412791A (en) * | 2019-08-23 | 2021-02-26 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigeration cycle device |
| CN113899114A (en) * | 2021-11-15 | 2022-01-07 | 宁波奥克斯电气股份有限公司 | Air conditioner and oil return control method and device |
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Application publication date: 20140910 |