CN203964436U - Two-stage Compression air-conditioning system - Google Patents

Two-stage Compression air-conditioning system Download PDF

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Publication number
CN203964436U
CN203964436U CN201420313052.XU CN201420313052U CN203964436U CN 203964436 U CN203964436 U CN 203964436U CN 201420313052 U CN201420313052 U CN 201420313052U CN 203964436 U CN203964436 U CN 203964436U
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heat exchanger
interface
double
conditioning
bypass line
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CN201420313052.XU
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李大伟
熊军
粱志滔
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The utility model discloses a kind of 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 aperture of first, second throttling arrangement is adjustable; Also comprise bypass line, storage heater and control valve, bypass line is connected between the first end interface and the air entry of double-stage compressor of outdoor heat exchanger, the first heat exchanger tube of storage heater is connected on the pipeline between the exhaust outlet of double-stage compressor and the first end interface of indoor heat exchanger, the second heat exchanger tube of storage heater is connected on bypass line, and control valve is for pipeline and bypass line between first end interface and the air entry of double-stage compressor of conducting optionally or disconnection chamber's external heat exchanger.Two-stage Compression air-conditioning system of the present utility model, can improve the operational efficiency of system; And defrosting speed is fast, can avoid the cold-producing medium cannot evaporating completely while defrosting to enter compressor.

Description

Two-stage Compression air-conditioning system
Technical field
The utility model relates to air-conditioning technical field, particularly relates to a kind of Two-stage Compression air-conditioning system.
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 in the utility model 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 utility model, 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 utility model, comprising:
When refrigeration or heating operation, described control valve control refrigerant is back to the air entry of described double-stage compressor via the pipeline between first end interface and the air entry of described double-stage compressor of described outdoor heat exchanger, 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 control refrigerant is back to the air entry of described double-stage compressor via described bypass line.
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 utility model, 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 the utility model additional technical feature 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 utility model;
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
Also the utility model is elaborated below with reference to accompanying drawing 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 utility model 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 utility model 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 utility model embodiment, 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 utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims (9)

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.
CN201420313052.XU 2014-06-12 2014-06-12 Two-stage Compression air-conditioning system Active CN203964436U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104061705A (en) * 2014-06-12 2014-09-24 珠海格力电器股份有限公司 Two-stage compression air conditioner system and control method thereof
WO2015161743A1 (en) * 2014-04-22 2015-10-29 珠海格力电器股份有限公司 Air-conditioning system with defrosting function
CN106288565A (en) * 2016-10-31 2017-01-04 广东美的制冷设备有限公司 Air-conditioning does not shut down defrosting system and method and air-conditioning
CN107655152A (en) * 2017-09-20 2018-02-02 珠海格力电器股份有限公司 Air-conditioning system and its progress control method
US10941955B2 (en) 2017-10-27 2021-03-09 Dometic Sweden Ab Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015161743A1 (en) * 2014-04-22 2015-10-29 珠海格力电器股份有限公司 Air-conditioning system with defrosting function
CN104061705A (en) * 2014-06-12 2014-09-24 珠海格力电器股份有限公司 Two-stage compression air conditioner system and control method thereof
WO2015188656A1 (en) * 2014-06-12 2015-12-17 珠海格力电器股份有限公司 Two-stage compression air conditioning system and control method thereof
CN106288565A (en) * 2016-10-31 2017-01-04 广东美的制冷设备有限公司 Air-conditioning does not shut down defrosting system and method and air-conditioning
CN107655152A (en) * 2017-09-20 2018-02-02 珠海格力电器股份有限公司 Air-conditioning system and its progress control method
CN107655152B (en) * 2017-09-20 2020-05-22 珠海格力电器股份有限公司 Air conditioning system and operation control method thereof
US10941955B2 (en) 2017-10-27 2021-03-09 Dometic Sweden Ab Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle

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