CN104061705A - Two-stage compression air conditioner system and control method thereof - Google Patents
Two-stage compression air conditioner system and control method thereof Download PDFInfo
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- CN104061705A CN104061705A CN201410261178.1A CN201410261178A CN104061705A CN 104061705 A CN104061705 A CN 104061705A CN 201410261178 A CN201410261178 A CN 201410261178A CN 104061705 A CN104061705 A CN 104061705A
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- heat exchanger
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- stage compressor
- end interface
- stage compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
Abstract
The invention discloses a two-stage compression air conditioner system and a control method thereof. The air conditioner system comprises a two-stage compressor, a four-way reversing valve, an outdoor heat exchanger, a first throttling device, a flash evaporator, a second throttling device and an indoor heat exchanger, wherein the opening of the first throttling device and the second throttling device is adjustable. The air conditioner system further comprises a bypass pipeline, a heat accumulator and a control valve, wherein the bypass pipeline is connected between a first end interface of the outdoor heat exchanger and an air suction port of the two-stage compressor, a first heat exchange pipe of the heat accumulator is serially connected onto a pipeline between an air exhaust port of the two-stage compressor and a first end interface of the indoor heat exchanger, a second heat exchange pipe of the heat accumulator is serially connected onto the bypass pipeline, and the control valve is used for selectively opening or closing the pipeline between the first end interface of the outdoor heat exchanger and the air suction port of the two-stage compressor and the bypass pipeline. The two-stage compression air conditioner system disclosed by the invention has the advantages that the operating efficiency of the system can be improved; the defrosting speed is fast and refrigerant which is not fully evaporated can be prevented from entering the compressor during defrosting.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to a kind of Two-stage Compression air-conditioning system and control method thereof.
Background technology
At present, the middle air compensation of the Two-stage Compression air-conditioning system with flash vessel is unadjustable, in the time that compressor adopts identical frequency, in system, the variation of other parameter may cause the fluctuation of middle air compensation, make compressor arrive running status off-target efficient point, cause compressor not move at best efficiency point.
In addition, the mode of the conventional defrosting of Two-stage Compression air-conditioning system is to heat in process, and while reaching defrosting condition, compressor is first shut down, and then start turns refrigeration mode, defrosts.After defrosting finishes, then shut down, then start goes back to heating mode.This Defrost mode, compressor is through twice start-stop, and length consuming time defrosts.And under refrigeration mode, can absorb heat from indoor environment, cause indoor temperature in defrost process to decline rapidly, affect user and use comfortableness.The problems referred to above that exist in order to solve traditional Defrost mode, prior art has proposed a kind of thermal storage defrosting method, main low-temperature heat source when this Defrost method adopts the storage heater being arranged on compressor housing as defrosting operating condition.When freezing or heating, storage heater absorbs the used heat of compressor, and when heating and defrosting, four-way change-over valve does not commutate, and refrigerant, after indoor heat exchanger flows out, enters into outdoor heat exchanger through the bypass line in parallel with electric expansion valve and defrosts.Although this Defrost method can solve the problems referred to above that traditional Defrost mode exists, but, because this Defrost mode is that the heat that utilizes compressor to produce carries out accumulation of heat, therefore the phase change heat storage material phase transformation temperature points that used will inevitably be lower, heat-storing material heat absorption and release speed can be slower, thereby make defrosting speed slower, extend the defrost time, affect equally heating effect and comfort level.Especially for the Two-stage Compression air-conditioning system with defrost function, in heating, because the existence of flash vessel, refrigerant must be by again excessively cold in flowing through flash vessel, the refrigerant that flows into outdoor heat exchanger must be in compared to the lower temperature of single stage compress, so its frosting situation can be more seriously, more frequent, therefore defrosting speed is slower.And, in the time that storage heater amount of stored heat is not enough, defrost, can cause the cold-producing medium cannot evaporating completely in a large number to enter compressor, thereby the reliability of compressor is caused to fatal threat.
Summary of the invention
For above-mentioned prior art present situation, technical problem to be solved by this invention is, a kind of Two-stage Compression air-conditioning system is provided, in the middle of it, air compensation is adjustable, and defrosting speed is fast, the cold-producing medium that can avoid cannot evaporating completely while defrosting enters compressor compressor is caused to adverse effect.
In order to solve the problems of the technologies described above, a kind of Two-stage Compression air-conditioning system provided by the present invention, comprise double-stage compressor, four-way change-over valve, outdoor heat exchanger, first throttle device, flash vessel, the second throttling arrangement and indoor heat exchanger, the exhaust outlet of described double-stage compressor and air entry are connected with the first end interface of described outdoor heat exchanger and the first end interface of described indoor heat exchanger by described four-way change-over valve, the second end interface of described outdoor heat exchanger is connected with the first interface of described flash vessel by described first throttle device, the second interface of described flash vessel is connected with the second end interface of described indoor heat exchanger by described the second throttling arrangement, the 3rd interface of described flash vessel is connected with the gas supplementing opening of described double-stage compressor by tonifying Qi pipeline,
The aperture of described first throttle device and described the second throttling arrangement is adjustable;
Also comprise bypass line, storage heater and control valve, described bypass line is connected between the first end interface and the air entry of described double-stage compressor of described outdoor heat exchanger, described storage heater has the first heat exchanger tube and the second heat exchanger tube, described the first heat exchanger tube is connected on the pipeline between the exhaust outlet of described double-stage compressor and the first end interface of described indoor heat exchanger, described the second heat exchanger tube is connected on described bypass line, described control valve is for conducting optionally or disconnect pipeline and the described bypass line between first end interface and the air entry of described double-stage compressor of described outdoor heat exchanger.
In an embodiment, described Two-stage Compression air-conditioning system also comprises the 3rd throttling arrangement therein, and described the 3rd throttling arrangement is connected on the described bypass line of described the second heat exchange tube inlet side of described storage heater.
In an embodiment, described the 3rd throttling arrangement is capillary therein.
In an embodiment, the passage aperture of described control valve is less than the aperture of refrigerant pipe therein, makes to flow into described second heat exchanger tube of described storage heater after the coolant throttle of described control valve.
Therein in an embodiment, one end of described bypass line is connected on the pipeline between the first end interface of described four-way change-over valve and described outdoor heat exchanger, and the other end is connected on the pipeline between described four-way change-over valve and the air entry of described double-stage compressor.
In an embodiment, the two ends of described bypass line are all connected on the pipeline between described four-way change-over valve and the air entry of described double-stage compressor therein.
In an embodiment, described control valve is triple valve therein.
In an embodiment, described first throttle device and described the second throttling arrangement are electric expansion valve therein.
In an embodiment, on described tonifying Qi pipeline, be provided with aeration valve therein.
The control method of a kind of Two-stage Compression air-conditioning system provided by the present invention, comprising:
When refrigeration or heating operation, pipeline described in described control valve conducting between first end interface and the air entry of described double-stage compressor of outdoor heat exchanger, disconnect described bypass line, by regulating the aperture size adjustment of described first throttle device and/or described the second throttling arrangement through the uninterrupted of the cold-producing medium of described tonifying Qi pipeline;
When Defrost operation, described control valve disconnects bypass line described in pipeline between first end interface and the air entry of described double-stage compressor of described outdoor heat exchanger, conducting.
In an embodiment, when Defrost operation, described tonifying Qi pipeline disconnects therein.
Compared with prior art, Two-stage Compression air-conditioning system of the present invention and control method thereof, because the aperture of first throttle device and the second throttling arrangement is adjustable, be the uninterrupted of the adjustable cold-producing medium through tonifying Qi pipeline by regulating the aperture size of first throttle device and/or the second throttling arrangement, thereby can effectively arrive the air inflow of tonifying Qi section in the middle of regulating, system is operated near best efficiency point, improved the operational efficiency of system; And, the high temperature refrigerant that this Two-stage Compression air-conditioning system utilizes compressor directly to discharge carries out accumulation of heat, therefore can adopt the phase change heat storage material that phase transformation temperature points is higher, like this, in the time of defrosting, the temperature difference of phase change heat storage material and cold-producing medium strengthens, and the heat release speed of phase change heat storage material is fast, corresponding defrosting speed also can be accelerated, and has ensured the comfortableness that user uses.And, storage heater amount of stored heat abundance when defrosting, the cold-producing medium of having avoided cannot evaporating completely enters compressor and causes liquid hammer, thereby the reliability of compressor is caused to fatal threat.
The beneficial effect that additional technical feature of the present invention has will describe in this description detailed description of the invention part.
Brief description of the drawings
Fig. 1 is the system diagram of the Two-stage Compression air-conditioning system in one of them embodiment of the present invention;
Schematic flow sheet when Fig. 2 is the Two-stage Compression air-conditioning system refrigeration in Fig. 1;
Fig. 3 is the schematic flow sheet of the Two-stage Compression air-conditioning system in Fig. 1 while heating;
Schematic flow sheet when Fig. 4 is the Two-stage Compression air-conditioning system defrosting in Fig. 1.
Description of reference numerals: 1, double-stage compressor; 2, indoor heat exchanger; 3, the second throttling arrangement; 4, flash vessel; 5, first throttle device; 6, outdoor heat exchanger; 7, triple valve; 8, four-way change-over valve; 9, aeration valve; 10, the 3rd throttling arrangement; 11, storage heater; 11a, the first heat exchanger tube; 11b, the second heat exchanger tube; 12, tonifying Qi pipeline; 13, bypass line.
Detailed description of the invention
Below with reference to accompanying drawing, also the present invention is described in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in following embodiment and embodiment can combine mutually.
As shown in Figure 1, the Two-stage Compression air-conditioning system in one of them embodiment of the present invention comprises double-stage compressor 1, four-way change-over valve 8, outdoor heat exchanger 6, first throttle device 5, flash vessel 4, the second throttling arrangement 3, indoor heat exchanger 2, bypass line 13, storage heater 11 and control valve.
Wherein, the exhaust outlet of described double-stage compressor 1 and air entry are connected with the first end interface 6a of described outdoor heat exchanger 6 and the first end interface 2a of described indoor heat exchanger 2 by described four-way change-over valve 8, the second end interface 6b of described outdoor heat exchanger 6 is connected with the first interface of described flash vessel 4 by described first throttle device 5, the second interface of described flash vessel 4 is connected with the second end interface 2b of described indoor heat exchanger 2 by described the second throttling arrangement 3, the 3rd interface of described flash vessel 4 is connected with the gas supplementing opening of described double-stage compressor 1 by tonifying Qi pipeline 12.The aperture of described first throttle device 5 and described the second throttling arrangement 3 is adjustable, like this, be the uninterrupted of the adjustable cold-producing medium through tonifying Qi pipeline 12 by regulating the aperture size of first throttle device 5 and/or the second throttling arrangement 3, thereby can effectively arrive the air inflow of tonifying Qi section in the middle of regulating, system is operated near best efficiency point, improved the operational efficiency of system.
Described bypass line 13 is connected between the first end interface 6a of described outdoor heat exchanger 6 and the air entry of described double-stage compressor 1, in the present embodiment, one end of described bypass line 13 is connected on the pipeline between described four-way change-over valve 8 and the first end interface of described outdoor heat exchanger 6, and the other end is connected on the pipeline between described four-way change-over valve 8 and the air entry of described double-stage compressor 1.Certainly, described bypass line 13 can also all be connected on the pipeline between described four-way change-over valve 8 and the air entry of described double-stage compressor 1 at two ends.
Described storage heater 11 has the first heat exchanger tube 11a and the second heat exchanger tube 11b, described the first heat exchanger tube 11a is connected on the pipeline between exhaust outlet and the described four-way change-over valve 8 of described double-stage compressor 1, and the first heat exchanger tube 11a also can be connected on the pipeline between four-way change-over valve 8 and the first end interface of described indoor heat exchanger 2; Described the second heat exchanger tube 11b is connected on described bypass line 13.
Described control valve for conducting optionally or disconnect the first end interface of described outdoor heat exchanger 6 and the air entry of described double-stage compressor 1 between pipeline and described bypass line 13.Preferably, described control valve is triple valve 7, and triple valve 7 also can adopt two two-port valves to replace.
The high temperature refrigerant that the Two-stage Compression air-conditioning system of the present embodiment utilizes compressor directly to discharge carries out accumulation of heat, therefore can adopt the phase change heat storage material that phase transformation temperature points is higher, like this, in the time of defrosting, the temperature difference of phase change heat storage material and cold-producing medium strengthens, the heat release speed of phase change heat storage material is fast, and corresponding defrosting speed also can be accelerated, and has ensured the comfortableness that user uses.And, storage heater 11 amount of stored heat abundances when defrosting, the cold-producing medium of having avoided cannot evaporating completely enters compressor and causes liquid hammer, thereby the reliability of compressor is caused to fatal threat.
Preferably, also comprise the 3rd throttling arrangement 10, described the 3rd throttling arrangement 10 is connected on the described bypass line 13 of described the second heat exchanger tube 11b entrance side.Further preferably, described the 3rd throttling arrangement 10 is capillary.Like this, the refrigerant that outdoor heat exchanger 6 exports is by after capillary-compensated, then enters storage heater 11 heat absorption evaporations, is conducive to liquid coolant and evaporates completely, and the cold-producing medium of having avoided cannot evaporating completely enters double-stage compressor 1 and causes liquid hammer.Certainly, capillary also can replace with the triple valve 7 that passage aperture is less than refrigerant pipe aperture, and triple valve 7 also can play throttling action like this.
Preferably, on described tonifying Qi pipeline 12, be provided with aeration valve 9, control conducting and the disconnection of tonifying Qi pipeline 12 by aeration valve 9.
The present invention also provides a kind of control method of Two-stage Compression air-conditioning system, comprises the following steps:
When step 1, refrigeration or heating operation, pipeline described in described triple valve 7 conductings between the first end interface of outdoor heat exchanger 6 and the air entry of described double-stage compressor 1, disconnect described bypass line 13, described aeration valve 9 is opened, by regulating the aperture size adjustment of described first throttle device 5 and/or described the second throttling arrangement 3 through the uninterrupted of the cold-producing medium of described tonifying Qi pipeline 12.Detailed process is as follows:
When cooling system operation, see Fig. 2, carry out heat exchange by double-stage compressor 1 exhaust outlet high temperature and high pressure gas out through the first heat exchanger tube 11a and the phase change heat storage material of storage heater 11, phase change heat storage material absorbs heat and undergoes phase transition, heat is stored, then refrigerant enters outdoor heat exchanger 6 through four-way change-over valve 8, and with outdoor environment heat exchange, release heat, the refrigerant first throttle device 5 of first flowing through, entering flash vessel 4 vaporizes again, the liquid refrigerants that flash vessel 4 is separated through the second throttling arrangement 3 throttlings laggard enter indoor heat exchanger 2, carry out heat exchange with indoor environment, heat amount of heat in absorption chamber, enter double-stage compressor 1 air entry finally by crossing four-way change-over valve 8, complete kind of refrigeration cycle one time, the gaseous coolant that flash vessel 4 is separated enters the gas supplementing opening of double-stage compressor 1 through aeration valve 9.In the time that needs increase air compensation, open the aperture of large first throttle device 5, turn down or maintain the aperture of the second throttling arrangement 3, the coolant quantity that enters like this flash vessel 4 increases, and the coolant quantity of outflow reduces or is constant, and middle air compensation increases; Or, turn down the aperture of first throttle device 5, turn down more the aperture of the second throttling arrangement 3 simultaneously, reduce although at this moment enter the refrigerant of flash vessel 4, flow out the amplitude that the coolant quantity of flash vessel 4 reduces larger, middle air compensation increases.Otherwise, in the time that needs reduce air compensation, turn down the aperture of first throttle device 5, close greatly or maintain the aperture of the second throttling arrangement 3, the coolant quantity that enters like this flash vessel 4 reduces, and the coolant quantity of outflow increases or is constant, and middle air compensation reduces; Or the aperture of increase first throttle device 5, increases the aperture of the second throttling arrangement 3 more, increase although at this moment enter the refrigerant of flash vessel 4, the amplitude that the coolant quantity of outflow flash vessel 4 increases is larger, and middle air compensation reduces.
When system heating operation, see Fig. 3, carry out heat exchange by double-stage compressor 1 exhaust outlet high temperature and high pressure gas out through the first heat exchanger tube 11a and the phase change heat storage material of storage heater 11, phase change heat storage material absorbs heat and undergoes phase transition, heat is stored, then refrigerant enters indoor heat exchanger 2 through four-way change-over valve 8, in indoor heat exchanger 2 condensation heat releases, and then after the second throttling arrangement 3 throttlings, enter flash vessel 4 and carry out gas-liquid separation, the liquid refrigerants that flash vessel 4 is separated through 5 throttlings of first throttle device laggard enter outdoor heat exchanger 6, evaporate at outdoor heat exchanger 6, absorb heat, enter double-stage compressor 1 air entry finally by crossing triple valve 7 and four-way change-over valve 8, complete and once heat circulation, the gaseous coolant that flash vessel 4 is separated enters the gas supplementing opening of double-stage compressor 1 through aeration valve 9.In the time that needs increase air compensation, open the aperture of large the second throttling arrangement 3, turn down or maintain the aperture of first throttle device 5, the coolant quantity that enters like this flash vessel 4 increases, and the coolant quantity of outflow reduces or is constant, and middle air compensation increases; Or, turn down the aperture of the second throttling arrangement 3, turn down more the aperture of first throttle device 5 simultaneously, reduce although at this moment enter the refrigerant of flash vessel 4, flow out the amplitude that the coolant quantity of flash vessel 4 reduces larger, middle air compensation increases.Otherwise, in the time that needs reduce air compensation, turn down the aperture of the second throttling arrangement 3, close greatly or maintain the aperture of first throttle device 5, the coolant quantity that enters like this flash vessel 4 reduces, and the coolant quantity of outflow increases or is constant, and middle air compensation reduces; Or the aperture of increase the second throttling arrangement 3, increases the aperture of first throttle device 5 more, increase although at this moment enter the refrigerant of flash vessel 4, the amplitude that the coolant quantity of outflow flash vessel 4 increases is larger, and middle air compensation reduces.
As can be seen here, because the aperture of first throttle device 5 and the second throttling arrangement 3 is adjustable, be the uninterrupted of the adjustable cold-producing medium through tonifying Qi pipeline 12 by regulating the aperture size of first throttle device 5 and/or the second throttling arrangement 3, thereby the control of air compensation in the middle of can realizing, makes to move near system best efficiency point.
When step 2, Defrost operation, described triple valve 7 disconnects bypass line 13 described in pipeline between the first end interface of described outdoor heat exchanger 6 and the air entry of described double-stage compressor 1, conducting, and described aeration valve 9 is closed.Detailed process is as follows:
In the time that system enters defrosting by heating operation, see Fig. 4, flow through the first heat exchanger tube 11a and the phase change heat storage material of storage heater 11 of the high temperature refrigerant that double-stage compressor 1 exhaust outlet is discharged carries out heat exchange, phase change heat storage material absorbs heat and undergoes phase transition, heat is stored, then refrigerant enters indoor heat exchanger 2 through four-way change-over valve 8, and in order to reduce thermal loss, now indoor fan is for closing or low windscreen state.The rear refrigerant of indoor heat exchanger 2 of flowing through only has a small amount of heat loss, then flow through the second throttling arrangement 3, flash vessel 4, first throttle device 5, for the heat loss that ensures refrigerant in these three elements of flowing through reduces as far as possible, the aperture of the second throttling arrangement 3 and first throttle device 5 reaches maximum, closes aeration valve 9.Then high temperature refrigerant enters outdoor heat exchanger 6 and defrosts; After the interior condensing heat-exchange of outdoor heat exchanger 6, then commutate and enter the second heat exchanger tube 11b of storage heater 11 by triple valve 7, absorb the heat of storage heater 11 interior savings, evaporate, then enter double-stage compressor 1 air entry, complete defrost cycle.
As can be seen here, the Two-stage Compression air-conditioning system of the embodiment of the present invention, the high temperature refrigerant that utilizes compressor directly to discharge carries out accumulation of heat, therefore can adopt the phase change heat storage material that phase transformation temperature points is higher, like this, in the time of defrosting, the temperature difference of phase change heat storage material and cold-producing medium strengthens, the heat release speed of phase change heat storage material is fast, and corresponding defrosting speed also can be accelerated, and has ensured the comfortableness that user uses.And, storage heater amount of stored heat abundance when defrosting, the cold-producing medium of having avoided cannot evaporating completely enters compressor and causes liquid hammer, thereby the reliability of compressor is caused to fatal threat.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (11)
1. a Two-stage Compression air-conditioning system, comprise double-stage compressor, four-way change-over valve, outdoor heat exchanger, first throttle device, flash vessel, the second throttling arrangement and indoor heat exchanger, the exhaust outlet of described double-stage compressor and air entry are connected with the first end interface of described outdoor heat exchanger and the first end interface of described indoor heat exchanger by described four-way change-over valve, the second end interface of described outdoor heat exchanger is connected with the first interface of described flash vessel by described first throttle device, the second interface of described flash vessel is connected with the second end interface of described indoor heat exchanger by described the second throttling arrangement, the 3rd interface of described flash vessel is connected with the gas supplementing opening of described double-stage compressor by tonifying Qi pipeline,
It is characterized in that, the aperture of described first throttle device and described the second throttling arrangement is adjustable;
Also comprise bypass line, storage heater and control valve, described bypass line is connected between the first end interface and the air entry of described double-stage compressor of described outdoor heat exchanger, described storage heater has the first heat exchanger tube and the second heat exchanger tube, described the first heat exchanger tube is connected on the pipeline between the exhaust outlet of described double-stage compressor and the first end interface of described indoor heat exchanger, described the second heat exchanger tube is connected on described bypass line, described control valve is for conducting optionally or disconnect pipeline and the described bypass line between first end interface and the air entry of described double-stage compressor of described outdoor heat exchanger.
2. Two-stage Compression air-conditioning system according to claim 1, is characterized in that, also comprises the 3rd throttling arrangement, and described the 3rd throttling arrangement is connected on the described bypass line of described the second heat exchange tube inlet side of described storage heater.
3. Two-stage Compression air-conditioning system according to claim 2, is characterized in that, described the 3rd throttling arrangement is capillary.
4. Two-stage Compression air-conditioning system according to claim 1, is characterized in that, the passage aperture of described control valve is less than the aperture of refrigerant pipe, makes to flow into described second heat exchanger tube of described storage heater after the coolant throttle of described control valve.
5. Two-stage Compression air-conditioning system according to claim 1, it is characterized in that, one end of described bypass line is connected on the pipeline between the first end interface of described four-way change-over valve and described outdoor heat exchanger, and the other end is connected on the pipeline between described four-way change-over valve and the air entry of described double-stage compressor.
6. Two-stage Compression air-conditioning system according to claim 1, is characterized in that, the two ends of described bypass line are all connected on the pipeline between described four-way change-over valve and the air entry of described double-stage compressor.
7. Two-stage Compression air-conditioning system according to claim 1, is characterized in that, described control valve is triple valve.
8. according to the Two-stage Compression air-conditioning system described in any one in claim 1 to 7, it is characterized in that, described first throttle device and described the second throttling arrangement are electric expansion valve.
9. according to the Two-stage Compression air-conditioning system described in any one in claim 1 to 7, it is characterized in that, on described tonifying Qi pipeline, be provided with aeration valve.
10. a control method for Two-stage Compression air-conditioning system as in one of claimed in any of claims 1 to 9, is characterized in that, comprising:
When refrigeration or heating operation, pipeline described in described control valve conducting between first end interface and the air entry of described double-stage compressor of outdoor heat exchanger, disconnect described bypass line, by regulating the aperture size adjustment of described first throttle device and/or described the second throttling arrangement through the uninterrupted of the cold-producing medium of described tonifying Qi pipeline;
When Defrost operation, described control valve disconnects bypass line described in pipeline between first end interface and the air entry of described double-stage compressor of described outdoor heat exchanger, conducting.
The control method of 11. Two-stage Compression air-conditioning systems according to claim 10, is characterized in that, when Defrost operation, described tonifying Qi pipeline disconnects.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261178.1A CN104061705B (en) | 2014-06-12 | 2014-06-12 | Two-stage Compression air-conditioning system and its control method |
| PCT/CN2015/076355 WO2015188656A1 (en) | 2014-06-12 | 2015-04-10 | Two-stage compression air conditioning system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410261178.1A CN104061705B (en) | 2014-06-12 | 2014-06-12 | Two-stage Compression air-conditioning system and its control method |
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| CN104061705B CN104061705B (en) | 2017-03-15 |
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| CN104061705B (en) | 2017-03-15 |
| WO2015188656A1 (en) | 2015-12-17 |
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Effective date of registration: 20181116 Address after: 050035 No. 252 Pearl River Avenue, Shijiazhuang High-tech Zone, Hebei Province Co-patentee after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Patentee after: GREE ELECTRIC APPLIANCES (SHIJIAZHUANG) Co.,Ltd. Address before: 519000 No. 6 Jinji West Road, Qianshan, Zhuhai City, Guangdong Province Patentee before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |
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Inventor after: Wang Xianlin Inventor after: Li Dawei Inventor after: Xiong Jun Inventor after: Liang Zhitao Inventor after: Wu Junhong Inventor after: Lian Caiyun Inventor after: Peng Guangqian Inventor after: Lai Xiaocheng Inventor after: Tao Mengchun Inventor after: Liao Min Inventor after: Tian Yasong Inventor after: Che Wen Inventor before: Li Dawei Inventor before: Xiong Jun Inventor before: Liang Zhitao |