CN203533802U - Air-conditioning system - Google Patents
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- CN203533802U CN203533802U CN201320585046.5U CN201320585046U CN203533802U CN 203533802 U CN203533802 U CN 203533802U CN 201320585046 U CN201320585046 U CN 201320585046U CN 203533802 U CN203533802 U CN 203533802U
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Abstract
The utility model discloses an air-conditioning system. The air-conditioning system comprises a main circuit, an auxiliary heat exchanger and a second throttling assembly. The main circuit is formed by a compressor, a four-way valve, an outdoor heat exchanger, a first throttling assembly, an indoor heat exchanger and an air-liquid separator. The auxiliary heat exchanger and the second throttling assembly are connected in series and then connected to the two ends of the first throttling assembly in parallel and are used for raising air return temperature of the compressor. The auxiliary heat exchanger is further connected between the air-liquid separator and an air return port of the compressor. In the running process of the air-conditioning system, when it is judged that the air return superheat degree of the compressor is lower than a set value, the auxiliary heat exchanger is turned on to heat air return coolants, the coolants carry out cold and heat exchange in the auxiliary heat exchanger to enable the air return temperature of the compressor to be increased, so the air return superheat degree of the system is improved, the problems of liquid returning, running with liquid and other conditions of the compressor in the low-temperature running process are avoided, the running stability of a whole machine is improved, meanwhile, quick heating can be achieved, and comfort performance is improved.
Description
Technical field
The utility model relates to air-conditioning technical field, relates in particular to a kind of air-conditioning system that improves the compressor return air degree of superheat.
Background technology
Current, along with the raising of people's living standard, air-conditioning has been come into vast average family, and along with the enhancing of people's awareness of saving energy, convertible frequency air-conditioner also obtains applying more and more widely.Variable-frequency central air conditioner system is different from common air-conditioning system, its core is by regulating the frequency of compressor to realize the ability need in different chamber, compare with traditional central air-conditioning, that existing variable-frequency central air conditioner has is energy-conservation, comfortable, control feature flexibly, and is more prone to installation and maintenance.
But, for multi-online air-conditioning system, because pipe arrangement is long, drop is large, and filled coolant quantity is more, when cold operation, often easily evaporation is incomplete for refrigerant, causes liquid refrigerants directly to get back to compressor, causes compressing wet operation, even cause compressor liquid hammer, bring very large potential safety hazard to air-conditioning system stable operation.
Utility model content
Main purpose of the present utility model is to provide a kind of air-conditioning system, is intended to improve the return-air degree of superheat of air-conditioning system, improves air-conditioning system operation stability.
In order to achieve the above object, the utility model proposes a kind of air-conditioning system, comprise: the major loop being formed by compressor, cross valve, outdoor heat exchanger, first throttle assembly, indoor heat exchanger and gas-liquid separator, described air-conditioning system also comprises a supplementary heat exchanger and the second orifice union, after described supplementary heat exchanger and the second throttling component string connection, be connected in parallel on the two ends of described first throttle assembly, for improving compressor return air temperature; Described supplementary heat exchanger is also connected between described gas-liquid separator and the gas returning port of compressor.
Preferably, this air-conditioning system also comprises the 3rd orifice union, and described the 3rd orifice union is connected between outdoor heat exchanger and indoor heat exchanger.
Preferably, described the second orifice union and supplementary heat exchanger are connected between described outdoor heat exchanger and the 3rd orifice union.
Preferably, described supplementary heat exchanger and the second throttling component string are associated between described the 3rd orifice union and described indoor heat exchanger.
Preferably, this air-conditioning system also comprises the 4th orifice union, and described the 4th orifice union is connected between described outdoor heat exchanger and first throttle assembly; Described the 3rd orifice union is connected between described first throttle assembly and indoor heat exchanger.
Preferably, described the 3rd orifice union comprises: the first magnetic valve and first electric expansion valve in parallel with described the first magnetic valve; Described the 4th orifice union comprises: the second magnetic valve and second electric expansion valve in parallel with described the second magnetic valve; When refrigeration mode, described the first electric expansion valve and the second magnetic valve are opened, described the second electric expansion valve and the first closed electromagnetic valve; When heating mode, described the first electric expansion valve and the second closed electromagnetic valve, described the second electric expansion valve and the first magnetic valve are opened; Described the second orifice union and first throttle assembly are magnetic valve.
Preferably, this air-conditioning system also comprises for detection of the pressure sensor of compressor return air pressure, for detection of the temperature sensor of compressor return air temperature, and while being less than the first setting value for the difference between the saturation temperature corresponding with the back pressure of detection of the suction temperature when detecting, opening described supplementary heat exchanger heating return-air refrigerant and control corresponding magnetic valve and the controller of electric expansion valve open and close; Described pressure sensor and temperature sensor are all arranged on the return-air duct of compressor, and temperature sensor is near the gas returning port of compressor.
Preferably, described controller is also for when opening described supplementary heat exchanger heating return-air refrigerant, controlling described the second orifice union opens, first throttle assembly is closed, and the difference between the suction temperature the detecting saturation temperature corresponding with the back pressure of detection is while being greater than the second setting value, exit described supplementary heat exchanger exchange heat exchange heating return-air refrigerant, and control described the second orifice union and close, first throttle assembly is opened.
Preferably, this air-conditioning system also comprises oil eliminator, and described oil eliminator is connected between the inlet end of described cross valve and the exhaust outlet of compressor.
Preferably, described compressor is set to separate unit, or many parallel connections; And/or described indoor heat exchanger is set to separate unit, or many parallel connections.
A kind of air-conditioning system with raising return-air degree of superheat function the utility model proposes, by setting up a supplementary heat exchanger and an orifice union on the major loop at outdoor heat exchanger and indoor heat exchanger, and also supplementary heat exchanger is connected to total muffler of compressor, in air-conditioning system running, when the return-air degree of superheat of judgement compressor is lower than when setting value, supplementary heat exchanger is opened heating return-air refrigerant, refrigerant carries out cold and hot exchange therein, compressor return air temperature is raise, thereby improve the return-air degree of superheat of system, the compressor easily occurring while avoiding compressor cold operation returns liquid, the problems such as band liquid operation, improve complete machine operation stability, can also realize fast and heat simultaneously, improve comfortableness.In addition, this scheme also can be widely used in central air-conditioning unit multi-gang air conditioner.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model air-conditioning system the first embodiment;
Fig. 2 is a kind of structural representation of the utility model air-conditioning system the second embodiment;
Fig. 3 is the another kind of structural representation of the utility model air-conditioning system the second embodiment;
Fig. 4 is the structural representation of the utility model air-conditioning system the 3rd embodiment;
Fig. 5 is the structural representation of the utility model air-conditioning system the 4th embodiment.
In order to make the technical solution of the utility model clearer, clear, below in conjunction with accompanying drawing, be described in further detail.
The specific embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the utility model the first embodiment proposes a kind of air-conditioning system, this air-conditioning system comprises: the major loop being formed by compressor 1, cross valve 3, outdoor heat exchanger 4, first throttle assembly 8, indoor heat exchanger 12 and gas-liquid separator 13, and first throttle assembly 8 is connected between outdoor heat exchanger 4 and indoor heat exchanger 12; Compressor 1 comprises gas returning port 16 and exhaust outlet 17; Cross valve 3 has inlet end, exhaust end, condensation end and evaporation ends; Between the inlet end of cross valve 3 and the exhaust outlet 17 of compressor 1, be connected with oil eliminator 2.
The present embodiment air-conditioning system also comprises a supplementary heat exchanger 10 and the second orifice union 7, after described supplementary heat exchanger 10 and the second orifice union 7 series connection, be connected in parallel on the two ends of described first throttle assembly 8, be used for improving compressor 1 suction temperature, wherein, supplementary heat exchanger 10 is also connected between described gas-liquid separator 13 and the gas returning port 16 of compressor 1.
In the present embodiment, in air-conditioner running when the compressor 1 return-air degree of superheat is lower than when setting value, by supplementary heat exchanger 10 and outdoor heat exchanger 4(refrigeration mode) or indoor heat exchanger 12(heating mode) carry out heat exchange and obtain heat, and the heat that this exchange is obtained is for adding the refrigerant in thermocompressor 1 return line, promotes thus the suction temperature of compressor 1.
Further, for the convenient control to indoor set and off-premises station, the present embodiment air-conditioning system also comprises: controller (not shown), pressure sensor 15, temperature sensor 14, wherein:
Described pressure sensor 15 is for detection of the back pressure of compressor 1; Described temperature sensor 14 is for detection of the suction temperature of compressor 1; Described pressure sensor 15 and temperature sensor 14 are all arranged on the return-air duct of compressor 1, and temperature sensor 14 is near the gas returning port 16 of compressor 1.
When described controller is less than the first setting value for the difference when between described back pressure and saturation temperature corresponding to suction temperature, opens described supplementary heat exchanger 10 heating return-air refrigerants and control corresponding orifice union open and close.When described controller is also greater than the second setting value for the difference between described back pressure and saturation temperature corresponding to suction temperature, exit described supplementary heat exchanger 10 exchange heat exchange heating return-air refrigerants.
Particularly, described the second orifice union 7 can be electric expansion valve, and first throttle assembly 8 can be magnetic valve.Wherein, first throttle assembly 8, when supplementary heat exchanger 10 heating return-air refrigerant, can be opened, and also can close.
Based on said structure, elaborate the present embodiment air-conditioning system below and by supplementary heat exchanger 10, improve the principle of the compressor 1 return-air degree of superheat:
Air-conditioning system is in running, by controller, constantly detect compressor 1 suction temperature Th and back pressure Pa, through calculating, when the difference between the suction temperature Th the detecting saturation temperature Ta corresponding with back pressure is less than the first setting value, while being Th-Ta < A, judgement supplementary heat exchanger 10 needs to open heating return-air refrigerant, and the second orifice union 7 is opened, first throttle assembly 8 is closed, and system enters return-air heated condition.
Take refrigeration mode as example, under return-air heated condition, from the refrigerant of outdoor heat exchanger 4 HTHP out, through the second orifice union 7, enter supplementary heat exchanger 10, from supplementary heat exchanger 10 refrigerant out, enter indoor heat exchanger 12, refrigerant is in indoor heat exchanger 12 evaporation heat releases, from the refrigerant of indoor heat exchanger 12 low-temp low-pressure out, through cross valve 3, enter gas-liquid separator 13, from gas-liquid separator 13 low-temp low-pressure gas out, enter supplementary heat exchanger 10, thus, the refrigerant that the refrigerant that temperature is higher and temperature are lower carries out heat-shift in supplementary heat exchanger 10, the refrigerant temperature of getting back to compressor 1 gas returning port 16 from supplementary heat exchanger 10 is raise, be that compressor 1 suction temperature raises, thereby improve the return-air degree of superheat of system.Return-air principle of heating under heating mode is similar to refrigeration mode, does not repeat them here.
When system detects difference between the saturation temperature Ta that suction temperature Th is corresponding with back pressure and is greater than the second setting value, while being Th-Ta > B, judgement system can exit supplementary heat exchanger 10 exchange heat exchange heating return-air refrigerants, the second orifice union 7 can be closed, first throttle assembly 8 is opened, and system circulates normally.
In addition, it should be noted that, in above-mentioned air-conditioning system, compressor 1 can be arranged to separate unit or many parallel connections according to power system capacity size; In like manner, air-conditioning indoor heat exchanger 12 also can be set to multi-joint form.
The present embodiment passes through such scheme, by setting up a supplementary heat exchanger 10 and an orifice union 7 on the major loop at outdoor heat exchanger 4 and indoor heat exchanger 12, and also supplementary heat exchanger 10 is connected to total muffler of compressor 1, in air-conditioning system running, when the return-air degree of superheat of judgement compressor 1 is lower than when setting value, supplementary heat exchanger 10 is opened heating return-air refrigerant, system controls corresponding magnetic valve and electric expansion valve is opened or closes, enter return-air heated condition, the refrigerant that the refrigerant that temperature is higher and temperature are lower carries out exchange heat in supplementary heat exchanger 10, compressor 1 suction temperature is raise, thereby improve the return-air degree of superheat of system, the 1 time liquid of compressor easily occurring while avoiding compressor 1 cold operation, the problems such as band liquid operation, improve complete machine operation stability, can also realize fast and heat simultaneously, improve comfortableness.In addition, this scheme also can be widely used in central air-conditioning unit multi-gang air conditioner.
As shown in Figures 2 and 3, the utility model the second embodiment proposes a kind of air-conditioning system, be with the difference of above-mentioned the first embodiment, the present embodiment is on the basis of above-mentioned the first embodiment, further comprise the 3rd orifice union, described the 3rd orifice union is connected between outdoor heat exchanger 4 and indoor heat exchanger 12.
As a kind of embodiment, as shown in Figure 2, the second orifice union 7 and supplementary heat exchanger 10 are connected between described outdoor heat exchanger 4 and the 3rd orifice union, be in parallel with first throttle assembly 8 after supplementary heat exchanger 10 and the second orifice union 7 series connection, the parallel pipeline of formation is connected between outdoor heat exchanger 4 and the 3rd orifice union.
As another kind of embodiment, as shown in Figure 3, supplementary heat exchanger 10 and the second orifice union 7 are connected between described the 3rd orifice union and described indoor heat exchanger 12, be in parallel with first throttle assembly 8 after supplementary heat exchanger 10 and the second orifice union 7 series connection, the parallel pipeline of formation is connected between the 3rd orifice union and indoor heat exchanger 12.
The present embodiment is with the first embodiment shown in Fig. 2: the second orifice union 7 and supplementary heat exchanger 10 are connected between outdoor heat exchanger 4 and the 3rd orifice union and are illustrated.
In the present embodiment, in air-conditioner running when the compressor 1 return-air degree of superheat is lower than when setting value, by supplementary heat exchanger 10 and outdoor heat exchanger 4(refrigeration mode) or indoor heat exchanger 12(heating mode) carry out heat exchange and obtain heat, and the heat that this exchange is obtained is for adding the refrigerant in thermocompressor 1 return line, promotes thus the suction temperature of compressor 1.
When controller is less than the first setting value for the difference when between described back pressure and saturation temperature corresponding to suction temperature, opens described supplementary heat exchanger 10 heating return-air refrigerants and control corresponding orifice union open and close.When described controller is also greater than the second setting value for the difference between described back pressure and saturation temperature corresponding to suction temperature, exit described supplementary heat exchanger 10 exchange heat exchange heating return-air refrigerants.
Particularly, described the second orifice union 7 can be magnetic valve under refrigeration mode, can be electric expansion valve under heating mode, and first throttle assembly 8 can be magnetic valve.Wherein, first throttle assembly 8, when supplementary heat exchanger 10 heating return-air refrigerant, can be opened, and also can close.
In the present embodiment, described the 3rd orifice union comprises: the first magnetic valve 9 and first electric expansion valve 11 in parallel with described the first magnetic valve 9; When refrigeration mode, described the first electric expansion valve 11 is opened, and described the first magnetic valve 9 cuts out; When heating mode, described the first electric expansion valve 11 is closed, and described the first magnetic valve 9 is opened.
Based on said structure, elaborate the present embodiment air-conditioning system below and by supplementary heat exchanger 10, improve the principle of the compressor 1 return-air degree of superheat:
Air-conditioning system is in running, by controller, constantly detect compressor 1 suction temperature Th and back pressure Pa, through calculating, when the difference between the suction temperature Th the detecting saturation temperature Ta corresponding with back pressure is less than the first setting value, while being Th-Ta < A, judgement supplementary heat exchanger 10 needs to open heating return-air refrigerant, and the second orifice union 7 is opened, first throttle assembly 8 is closed, and system enters return-air heated condition.When refrigeration mode, described the first electric expansion valve 11 is opened, and described the first magnetic valve 9 cuts out; During heating mode, described the first electric expansion valve 11 is closed, and described the first magnetic valve 9 is opened.
Take refrigeration mode as example, under return-air heated condition, from the refrigerant of outdoor heat exchanger 4 HTHP out through the second orifice union 7(magnetic valve) enter supplementary heat exchanger 10, again through supplementary heat exchanger 10, the first electric expansion valve 11 enters indoor heat exchanger 12, refrigerant is in indoor heat exchanger 12 evaporation heat releases, from the refrigerant of indoor heat exchanger 12 low-temp low-pressure out, through cross valve 3, enter gas-liquid separator 13, from gas-liquid separator 13 low-temp low-pressure out, enter supplementary heat exchanger 10, thus, the refrigerant that the refrigerant that temperature is higher and temperature are lower carries out heat-shift in supplementary heat exchanger 10, the refrigerant temperature of getting back to compressor 1 gas returning port 16 from supplementary heat exchanger 10 is raise, be that compressor 1 suction temperature raises, thereby improve the return-air degree of superheat of system.Return-air principle of heating under heating mode is similar to refrigeration mode, does not repeat them here.
When system detects difference between the saturation temperature Ta that suction temperature Th is corresponding with back pressure and is greater than the second setting value, while being Th-Ta > B, judgement system can exit supplementary heat exchanger 10 exchange heat exchange heating return-air refrigerants, the second orifice union 7 can be closed, first throttle assembly 8 is opened, the first magnetic valve 9 and the first electric expansion valve 11 enter normal control, and system circulates normally.
The present embodiment passes through such scheme, by setting up a supplementary heat exchanger 10 and an orifice union 7 on the major loop at outdoor heat exchanger 4 and indoor heat exchanger 12, and also supplementary heat exchanger 10 is connected to total muffler of compressor 1, in air-conditioning system running, when the return-air degree of superheat of judgement compressor 1 is lower than when setting value, supplementary heat exchanger 10 is opened heating return-air refrigerant, system controls corresponding magnetic valve and electric expansion valve is opened or closes, enter return-air heated condition, the refrigerant that the refrigerant that temperature is higher and temperature are lower carries out exchange heat in supplementary heat exchanger 10, compressor 1 suction temperature is raise, thereby improve the return-air degree of superheat of system, the 1 time liquid of compressor easily occurring while avoiding compressor 1 cold operation, the problems such as band liquid operation, improve complete machine operation stability, can also realize fast and heat simultaneously, improve comfortableness.In addition, by the 3rd throttle part is set, can make supplementary heat exchanger 10 there is better heat transfer effect, and then make the return-air degree of superheat raising effect of system better; In addition, this scheme also can be widely used in central air-conditioning unit multi-gang air conditioner.
The principle of the embodiment shown in above-mentioned Fig. 3 is similar to Fig. 2, does not repeat them here.
As shown in Figure 4, the utility model the 3rd embodiment proposes a kind of air-conditioning system, be with the difference of above-mentioned the second embodiment, the present embodiment is on the basis of above-mentioned the second embodiment, specifically on the basis of the embodiment shown in above-mentioned Fig. 2, also comprise the 4th orifice union, described the 4th orifice union is connected between described outdoor heat exchanger 4 and the 3rd orifice union, is specially after the 4th orifice union is connected with first throttle assembly 8 and is connected between outdoor heat exchanger 4 and the 3rd orifice union.
In the present embodiment, in air-conditioner running when the compressor 1 return-air degree of superheat is lower than when setting value, by supplementary heat exchanger 10 and outdoor heat exchanger 4(refrigeration mode) or indoor heat exchanger 12(heating mode) carry out heat exchange and obtain heat, and the heat that this exchange is obtained is for adding the refrigerant in thermocompressor 1 return line, promotes thus the suction temperature of compressor 1.
Particularly, described the second orifice union 7 and first throttle assembly 8 can be all magnetic valve.Wherein, first throttle assembly 8, when supplementary heat exchanger 10 heating return-air refrigerant, can be opened, and also can close.
Described the 3rd orifice union comprises: the first magnetic valve 9 and first electric expansion valve 11 in parallel with described the first magnetic valve 9; Described the 4th orifice union comprises: the second magnetic valve 6 and second electric expansion valve 5 in parallel with described the second magnetic valve 6; When refrigeration mode, described the first electric expansion valve 11 and the second magnetic valve 6 are opened, and described the second electric expansion valve 5 and the first magnetic valve 9 are closed; When heating mode, described the first electric expansion valve 11 and the second magnetic valve 6 are closed, and described the second electric expansion valve 5 and the first magnetic valve 9 are opened.
Based on said structure, elaborate the present embodiment air-conditioning system below and by supplementary heat exchanger 10, improve the principle of the compressor 1 return-air degree of superheat:
Air-conditioning system is in running, by controller, constantly detect compressor 1 suction temperature Th and back pressure Pa, through calculating, when the difference between the suction temperature Th the detecting saturation temperature Ta corresponding with back pressure is less than the first setting value, while being Th-Ta < A, judgement supplementary heat exchanger 10 needs to open heating return-air refrigerant, and the second orifice union 7 is opened, first throttle assembly 8 is closed, and system enters return-air heated condition.When refrigeration mode, described the first electric expansion valve 11 and the second magnetic valve 6 are opened, and described the second electric expansion valve 5 and the first magnetic valve 9 are closed; During heating mode, described the first electric expansion valve 11 and the second magnetic valve 6 are closed, and described the second electric expansion valve 5 and the first magnetic valve 9 are opened.
Take refrigeration mode as example, under return-air heated condition, from the refrigerant of outdoor heat exchanger 4 HTHP out through the first magnetic valve 9, the second orifice union 7(magnetic valve) enter in supplementary heat exchanger 10, again through supplementary heat exchanger 10, the first electric expansion valve 11 enters indoor heat exchanger 12, refrigerant is in indoor heat exchanger 12 evaporation heat releases, from the refrigerant of indoor heat exchanger 12 low-temp low-pressure out, through cross valve 3, enter gas-liquid separator 13, from gas-liquid separator 13 low-temp low-pressure out, enter supplementary heat exchanger 10, thus, the refrigerant that the refrigerant that temperature is higher and temperature are lower carries out heat-shift in supplementary heat exchanger 10, the refrigerant temperature of getting back to compressor 1 gas returning port 16 from supplementary heat exchanger 10 is raise, be that compressor 1 suction temperature raises, thereby improve the return-air degree of superheat of system.Return-air principle of heating under heating mode is similar to refrigeration mode, does not repeat them here.
When system detects difference between the saturation temperature Ta that suction temperature Th is corresponding with back pressure and is greater than the second setting value, while being Th-Ta > B, judgement system can exit supplementary heat exchanger 10 exchange heat exchange heating return-air refrigerants, the second orifice union 7 can be closed, first throttle assembly 8 is opened, the first magnetic valve 9, the second magnetic valve 6 and the first electric expansion valve 11, the second electric expansion valve 5 enter normal control, and system circulates normally.
In addition, it should be noted that, in above-mentioned air-conditioning system, compressor 1 can be arranged to separate unit or many parallel connections according to power system capacity size; In like manner, air-conditioning indoor heat exchanger 12 also can be set to multi-joint form.
The utility model embodiment has the air-conditioning system that improves return-air degree of superheat function, by setting up a supplementary heat exchanger 10 and an orifice union on the major loop at outdoor heat exchanger 4 and indoor heat exchanger 12, and also supplementary heat exchanger 10 is connected to total muffler of compressor 1, in air-conditioning system running, when the return-air degree of superheat of judgement compressor 1 is lower than when setting value, supplementary heat exchanger 10 is opened heating return-air refrigerant, system controls corresponding magnetic valve and electric expansion valve is opened or closes, enter return-air heated condition, the refrigerant that the refrigerant that temperature is higher and temperature are lower carries out exchange heat in supplementary heat exchanger 10, compressor 1 suction temperature is raise, thereby improve the return-air degree of superheat of system, the 1 time liquid of compressor easily occurring while avoiding compressor 1 cold operation, the problems such as band liquid operation, improve complete machine operation stability, can also realize fast and heat simultaneously, improve comfortableness.In addition, this scheme also can be widely used in central air-conditioning unit multi-gang air conditioner.
As shown in Figure 5, the utility model the 4th embodiment proposes a kind of air-conditioning system, is with the difference of the 3rd embodiment shown in above-mentioned Fig. 3, the present embodiment has saved oil eliminator, can be so that system architecture be simpler, other are identical with the 3rd embodiment, do not repeat them here.
Above are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or flow process conversion that utilizes the utility model description and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. an air-conditioning system, comprise: the major loop being formed by compressor, cross valve, outdoor heat exchanger, first throttle assembly, indoor heat exchanger and gas-liquid separator, it is characterized in that, described air-conditioning system also comprises a supplementary heat exchanger and the second orifice union, after described supplementary heat exchanger and the second throttling component string connection, be connected in parallel on the two ends of described first throttle assembly, for improving compressor return air temperature; Described supplementary heat exchanger is also connected between described gas-liquid separator and the gas returning port of compressor.
2. air-conditioning system according to claim 1, is characterized in that, also comprises the 3rd orifice union, and described the 3rd orifice union is connected between outdoor heat exchanger and indoor heat exchanger.
3. air-conditioning system according to claim 2, is characterized in that, described the second orifice union and supplementary heat exchanger are connected between described outdoor heat exchanger and the 3rd orifice union.
4. air-conditioning system according to claim 2, is characterized in that, described supplementary heat exchanger and the second throttling component string are associated between described the 3rd orifice union and described indoor heat exchanger.
5. air-conditioning system according to claim 2, is characterized in that, also comprises the 4th orifice union, and described the 4th orifice union is connected between described outdoor heat exchanger and first throttle assembly; Described the 3rd orifice union is connected between described first throttle assembly and indoor heat exchanger.
6. air-conditioning system according to claim 5, is characterized in that, described the 3rd orifice union comprises: the first magnetic valve and first electric expansion valve in parallel with described the first magnetic valve; Described the 4th orifice union comprises: the second magnetic valve and second electric expansion valve in parallel with described the second magnetic valve; When refrigeration mode, described the first electric expansion valve and the second magnetic valve are opened, described the second electric expansion valve and the first closed electromagnetic valve; When heating mode, described the first electric expansion valve and the second closed electromagnetic valve, described the second electric expansion valve and the first magnetic valve are opened; Described the second orifice union and first throttle assembly are magnetic valve.
7. air-conditioning system according to claim 6, it is characterized in that, also comprise pressure sensor for detection of compressor return air pressure, for detection of the temperature sensor of compressor return air temperature, and while being less than the first setting value for the difference between the saturation temperature corresponding with the back pressure of detection of the suction temperature when detecting, opening described supplementary heat exchanger heating return-air refrigerant and control corresponding magnetic valve and the controller of electric expansion valve open and close; Described pressure sensor and temperature sensor are all arranged on the return-air duct of compressor, and temperature sensor is near the gas returning port of compressor.
8. air-conditioning system according to claim 7, it is characterized in that, described controller is also for when opening described supplementary heat exchanger heating return-air refrigerant, controlling described the second orifice union opens, first throttle assembly is closed, and the difference between the suction temperature the detecting saturation temperature corresponding with the back pressure of detection is while being greater than the second setting value, exits described supplementary heat exchanger exchange heat exchange and heats return-air refrigerant, and control described the second orifice union and close, first throttle assembly is opened.
9. air-conditioning system according to claim 8, is characterized in that, also comprises oil eliminator, and described oil eliminator is connected between the inlet end of described cross valve and the exhaust outlet of compressor.
10. according to the air-conditioning system described in any one in claim 1-9, it is characterized in that, described compressor is set to separate unit, or many parallel connections; And/or described indoor heat exchanger is set to separate unit, or many parallel connections.
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| CN201320585046.5U CN203533802U (en) | 2013-09-22 | 2013-09-22 | Air-conditioning system |
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| CN201320585046.5U CN203533802U (en) | 2013-09-22 | 2013-09-22 | Air-conditioning system |
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| CN105890209A (en) * | 2016-04-27 | 2016-08-24 | 常州大学 | Compressor with dissipated heat recycling function and air conditioner comprising compressor |
| CN107726569A (en) * | 2017-10-31 | 2018-02-23 | 广东美的暖通设备有限公司 | A kind of control method of air conditioner, control system and air conditioner |
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| CN114111089A (en) * | 2020-08-26 | 2022-03-01 | 广东美的暖通设备有限公司 | Air conditioning system and control method thereof |
| CN114111089B (en) * | 2020-08-26 | 2023-01-03 | 广东美的暖通设备有限公司 | Air conditioning system and control method thereof |
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| CN115264927A (en) * | 2022-08-26 | 2022-11-01 | 宁波奥克斯电气股份有限公司 | Oil temperature heating system, air conditioner, control method of air conditioner and readable storage medium |
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