CN211575589U - Heat pump type air conditioning system - Google Patents
Heat pump type air conditioning system Download PDFInfo
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- CN211575589U CN211575589U CN201922024687.3U CN201922024687U CN211575589U CN 211575589 U CN211575589 U CN 211575589U CN 201922024687 U CN201922024687 U CN 201922024687U CN 211575589 U CN211575589 U CN 211575589U
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Abstract
The utility model relates to the technical field of air conditioners, and provides a heat pump type air conditioning system, which comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a throttling element, wherein the indoor heat exchanger and the outdoor heat exchanger are communicated with the compressor through a four-way valve, and the throttling element is arranged between the indoor heat exchanger and the outdoor heat exchanger in series; also comprises a drainage tube and a switch valve; one end of the drainage tube is communicated with the interior of the outdoor heat exchanger or a refrigerant pipeline close to the throttling element, the other end of the drainage tube is communicated with the refrigerant pipeline of the outdoor heat exchanger close to the four-way valve, and the switch valve is arranged on the drainage tube; the utility model discloses simple structure, low cost cool off the refrigerant of its outlet side through the low temperature refrigerant who utilizes in the outdoor heat exchanger or the entrance side drainage, have effectively reduced breathing in and the exhaust temperature of compressor, have guaranteed the steady operation that air conditioning system can be under the heating mode.
Description
Technical Field
The utility model relates to an air conditioner technical field especially relates to a heat pump type air conditioning system.
Background
The heat pump type air conditioning system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a throttling element, wherein the indoor heat exchanger and the outdoor heat exchanger are communicated with the compressor through a four-way valve, and the throttling element is arranged between the indoor heat exchanger and the outdoor heat exchanger in series. Therefore, the heat pump type air conditioning system is provided with a four-way valve on the basis of a common air conditioning system, and the functions of an evaporator and a condenser in the original air conditioning system can be mutually exchanged by switching the conduction state of the four-way valve, so that the function of cooling indoor air is changed into the function of heating the indoor air. Thus, heat can be extracted from outdoor lower air in winter to heat indoor air, and heat of indoor air can be removed in summer to be transferred to outdoor.
In practical use, the heat pump type air conditioning system is found that in a winter heating mode, because the outdoor environment temperature is low, the evaporation temperature is correspondingly very low, the pressure ratio of a compressor is increased, the power consumption is increased, and the exhaust temperature is extremely high. When the exhaust temperature of the compressor is too high, the viscosity of lubricating oil in the compressor is reduced, poor lubrication is caused, the degradation of various resin materials in the compressor and the abrasion of parts of the compressor are accelerated, and the service life of the compressor is influenced; in addition, excessive exhaust gas temperatures also increase condenser load, which affects the efficiency of the overall heat pump air conditioning system.
At present, methods for reducing the exhaust temperature of a compressor in a heat pump type air conditioning system include an intermediate air supply method, a spray cooling method and a two-stage compression method, which are specifically as follows:
the intermediate air-supplementing method is characterized by that the refrigerant passed through the condenser is divided into two paths, one path is undergone the normal throttling and evaporation process, another path is equipped with a throttle valve, and a small portion of refrigerant liquid is throttled so as to reduce temperature and pressure, and the throttled low-temperature low-pressure gaseous refrigerant is fed into the compressor and mixed with another portion of refrigerant so as to attain the goal of reducing exhaust temperature of compressor.
And in the spray cooling, part of refrigerant liquid at the outlet of the condenser is directly sprayed into a cavity of the compressor for cooling so as to reduce the exhaust temperature of the compressor.
The two-stage compression method is to compress the low pressure of the system twice to reach the required high pressure, firstly compress the low pressure stage, increase the pressure to the intermediate pressure, cool the gas under the intermediate pressure to the high pressure stage after the intermediate cooling, and further compress the gas to reach the high pressure, so that the whole temperature of the system can not be greatly increased, and the exhaust temperature of the compressor can be reduced.
However, in the above method, for the intermediate air supply method, the air conditioning system is additionally provided with a throttling device, which increases the development cost of the air conditioning system, and for the air conditioning system adopting the intermediate air supply method, the charging amount of the refrigerant is increased, and a part of extra gas which does not generate cooling capacity is introduced, so that the loss of the compressor is increased, and the load of the air conditioning system is increased. Meanwhile, although the exhaust temperature of the compressor can be effectively reduced in a short time by spray liquid cooling, in the actual operation process, the amount of spray liquid sprayed into the cavity of the compressor is difficult to accurately control, if the amount of spray liquid is too small, the cooling effect is poor, and if the amount of spray liquid is too much, wet compression of the compressor is possibly caused, so that the operation efficiency of the whole air conditioning system is influenced, and the compressor is possibly damaged by liquid impact in severe cases. In addition, for the two-stage compression method, compared with the effect of reducing the exhaust temperature of the compressor, the performance of the air conditioning system is more inclined to be improved, so that the reduction of the exhaust temperature is not obvious, the structure of the air conditioning system is complex, and the research and development cost is high.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model aims at providing a heat pump type air conditioning system for solve the present research and development that is used for reducing compressor exhaust temperature's in heat pump type air conditioning system method exists with high costs, the cooling effect is not obvious and the big problem of loss of compressor.
(II) technical scheme
In order to solve the technical problem, the utility model provides a heat pump type air conditioning system, including compressor, indoor heat exchanger, outdoor heat exchanger and throttling element, indoor heat exchanger, outdoor heat exchanger are linked together through the four-way valve with the compressor, the throttling element is established ties and is set up between indoor heat exchanger and the outdoor heat exchanger; also comprises a drainage tube and a switch valve; one end of the drainage tube is communicated with the inside of the outdoor heat exchanger or a refrigerant pipeline close to the throttling element side, the other end of the drainage tube is communicated with the refrigerant pipeline close to the four-way valve side of the outdoor heat exchanger, and the switch valve is installed on the drainage tube.
Preferably, in the utility model discloses in the ooff valve is one-way stop valve, the direction that one-way stop valve switches on is that the refrigerant is followed outdoor heat exchanger's inside or be close to the refrigerant pipeline flow direction of throttling element side outdoor heat exchanger is close to the flow direction of the refrigerant pipeline of four-way valve side.
Preferably, in the present invention, the first valve port of the four-way valve is communicated with the outdoor heat exchanger, the second valve port is communicated with the inlet of the compressor, the third valve port is communicated with the indoor heat exchanger, and the fourth valve port is communicated with the outlet of the compressor; the four-way valve has a first state in which the first valve port is communicated with the second valve port, and a second state in which the first valve port is communicated with the fourth valve port.
Preferably, the utility model discloses in still including control system, control system is used for control the cross valve goes on first state with the switching of second state.
Preferably, in the present invention, the control system is respectively connected to the compressor and the throttling element; the compressor is a variable frequency compressor, and the throttling element is an electronic expansion valve.
Preferably, the present invention further comprises a difluoromethane refrigerant located inside the refrigerant pipeline.
Preferably, in the utility model discloses in indoor heat exchanger with outdoor heat exchanger is the finned tube heat exchanger respectively indoor heat exchanger with one side of outdoor heat exchanger disposes the fan respectively.
(III) technical effects
The utility model provides a heat pump type air conditioning system, when air conditioning system is in the heating cycle state, through opening the ooff valve on the drainage tube, a small amount of low temperature refrigerant of the refrigerant pipeline drainage of throttling element side in the usable outdoor heat exchanger or be close to, cool off its refrigerant steam in the refrigerant pipeline that is close to the cross valve side, thereby greatly reduced the holistic temperature of breathing in of compressor, and with this effectively reduce the exhaust temperature of compressor, and when the ooff valve on the drainage tube is in the off-state, air conditioning system gets into the refrigeration cycle state of conventional mode.
Therefore, the utility model has simple structure, when the low-temperature refrigerant of the drainage is used for cooling the main flow refrigerant steam output by the outdoor heat exchanger, no multi-system components are added in the air conditioning system, the research and development cost is low, and the economy is good; meanwhile, the cooling mode is favorable for ensuring that the air inlet temperature of the compressor is in a normal temperature range in the state, avoiding carbonization and deterioration, viscosity reduction and poor lubrication of lubricating oil caused by overhigh exhaust temperature of the compressor, reducing the abrasion of parts of the compressor, prolonging the service life of the compressor, ensuring the stability and safety of the compressor in long-term operation, avoiding the shutdown of the air conditioning system caused by the protection of the exhaust temperature of the compressor, and further ensuring the stable operation of the air conditioning system in the heating mode.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a heat pump type air conditioning system according to an embodiment of the present invention during a heating cycle;
fig. 2 is a schematic structural diagram of a heat pump type air conditioning system according to an embodiment of the present invention when the heat pump type air conditioning system is in a refrigeration cycle;
fig. 3 is a block flow diagram of a control method based on a heat pump type air conditioning system according to an embodiment of the present invention.
In the figure: 1. a compressor; 2. an indoor heat exchanger; 3. a throttling element; 4. an outdoor heat exchanger; 5. a four-way valve; 6. a drainage tube; 7. an on-off valve; 8. a refrigerant line; 9. a fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and 2, an embodiment of the present invention provides a heat pump type air conditioning system, including a compressor 1, an indoor heat exchanger 2, an outdoor heat exchanger 4 and a throttling element 3, where the indoor heat exchanger 2 and the outdoor heat exchanger 4 are communicated with the compressor 1 through a four-way valve 5, and the throttling element 3 is arranged in series between the indoor heat exchanger 2 and the outdoor heat exchanger 4; also comprises a drainage tube 6 and a switch valve 7; one end of the drainage tube 6 is communicated with the inside of the outdoor heat exchanger 4 or a refrigerant pipeline 8 close to the throttling element 3, the other end of the drainage tube is communicated with the refrigerant pipeline 8 of the outdoor heat exchanger 4 close to the four-way valve 5, and the switch valve 7 is arranged on the drainage tube 6.
Specifically, referring to fig. 1, when the air conditioning system is in a heating state, in the switching state of the four-way valve 5 at this time, the sequence of the refrigerant flowing through the various system components along the refrigerant line 8 is: the refrigerant passes through the indoor heat exchanger 2, the throttling element 3 and the outdoor heat exchanger 4 in sequence from the compressor 1 and then returns to the compressor 1. Under the state, high-temperature and high-pressure refrigerant steam output from the outlet of the compressor 1 firstly enters the indoor heat exchanger 2 after passing through the four-way valve 5, heat is released in the indoor heat exchanger 2 and then condensed into liquid, when the refrigerant liquid output from the outlet of the indoor heat exchanger 2 passes through the throttling element 3, the temperature and the pressure of the refrigerant liquid are reduced and reduced to form low-temperature and low-pressure refrigerant wet steam, the refrigerant enters the outdoor heat exchanger 4, the switch valve 7 is opened at the moment, a small amount of low-temperature refrigerant is diverted from the outdoor heat exchanger 4 under the drainage of the drainage tube 6 and sent to the refrigerant pipeline 8 at the outlet side of the outdoor heat exchanger 4 through the; in addition, most of the refrigerant absorbs heat in the outdoor heat exchanger 4, is evaporated and gasified, and is output at the outlet of the outdoor heat exchanger 4, so that most of the gasified refrigerant steam is mixed with a small part of the low-temperature refrigerant which is shunted, and refrigerant steam with a lower temperature is formed and then sent to the compressor 1, and a heating cycle is completed. Thus, the indoor heat exchanger 2 installed indoors functions as a condenser, and the outdoor heat exchanger 4 installed outdoors functions as an evaporator.
Referring to fig. 2, when the air conditioning system is in the cooling state, in the switching state of the four-way valve 5 at this time, the sequence of the refrigerant flowing through the various system components along the refrigerant line 8 is: the refrigerant passes through the outdoor heat exchanger 4, the throttling element 3 and the indoor heat exchanger 2 in sequence from the compressor 1 and then returns to the compressor 1. Under the state, high-temperature and high-pressure refrigerant steam output from the outlet of the compressor 1 firstly enters the outdoor heat exchanger 4, the refrigerant steam is converted into liquid after the outdoor heat exchanger 4 exchanges heat with the outdoor environment, the refrigerant is cooled and decompressed into low-temperature and low-pressure refrigerant wet steam when being output from the outlet of the outdoor heat exchanger 4 and passing through the throttling element 3, then the low-temperature and low-pressure refrigerant wet steam enters the indoor heat exchanger 2 to be evaporated, absorbed and refrigerated, and the refrigerant is sucked by the compressor 1 after being gasified, and a refrigeration cycle is completed. Thus, the cooling state of the air conditioning system is a conventional refrigeration cycle, in which the outdoor heat exchanger 4 provided outdoors functions as a condenser and the indoor heat exchanger 2 provided indoors functions as an evaporator.
As can be seen from the above, in the heat pump type air conditioning system of the present embodiment, by implementing an improvement on the existing heat pump type air conditioning system, in the heating mode, a small amount of low-temperature refrigerant is branched from the interior or inlet side of the outdoor heat exchanger 4, and is mixed with a large amount of refrigerant vapor evaporated and absorbed by the outdoor heat exchanger 4, so that the suction temperature of the whole compressor 1 is reduced, and the discharge temperature thereof is reduced. Compared with the existing method for reducing the exhaust temperature of the compressor 1, the air conditioning system disclosed by the embodiment has the advantages that the structure is simple, a plurality of system components are not added, and the research and development cost is low; on the premise of ensuring the performance of the air conditioning system, the low-temperature refrigerant liquid in the outdoor heat exchanger 4 is effectively utilized, so that the suction temperature and the exhaust temperature of the compressor 1 are reduced; in addition, in the mode, a small part of refrigerant flowing out of the outdoor heat exchanger 4 is a gas-liquid two-phase mixture, and when the small part of refrigerant is mixed with a large amount of refrigerant steam output after the outdoor heat exchanger 4 is evaporated, part of low-temperature refrigerant liquid can absorb heat and be gasified, so that the dryness of the refrigerant entering the compressor 1 can be ensured, the exhaust temperature of the compressor 1 is effectively reduced, and the risk of liquid impact of the compressor 1 is avoided.
Further, in the present embodiment, the on-off valve 7 is a one-way shutoff valve, and the direction of conduction of the one-way shutoff valve is the flow direction of the refrigerant flowing from the inside of the outdoor heat exchanger 4 or the refrigerant line 8 near the throttling element 3 to the refrigerant line 8 of the outdoor heat exchanger 4 near the four-way valve 5.
Specifically, the one-way stop valve is used as a directional conduction element, fluid can only flow in from the inlet side of the one-way stop valve, but cannot flow back from the outlet side of the one-way stop valve, so that when the air conditioning system is in a heating cycle, the one-way stop valve is automatically conducted according to the flow direction of refrigerant in a pipeline corresponding to the air conditioning system in the state, and a part of refrigerant with lower temperature automatically flows to a refrigerant pipeline 8 on the outlet side of the outdoor heat exchanger 4 from the inside or the refrigerant pipeline 8 on the inlet side of the outdoor heat exchanger 4 under the drainage of the drainage tube 6, so as to reduce the; when the air-conditioning system is in a refrigeration cycle, the one-way stop valve automatically stops because the refrigerant in the pipeline corresponding to the air-conditioning system reversely flows at the moment; therefore, when the one-way stop valve is selected as the switch valve 7, the opening and closing states of the switch valve 7 are not required to be independently controlled by an additional control system, the drainage of the refrigerant can be automatically controlled by the drainage pipe 6 according to the flow direction of the refrigerant in the corresponding working state of the air conditioning system, and the control complexity is greatly simplified.
Further, referring to fig. 1 and 2, in the present embodiment, a first valve port of the four-way valve 5 is communicated with the outdoor heat exchanger 4, a second valve port is communicated with an inlet of the compressor 1, a third valve port is communicated with the indoor heat exchanger 2, and a fourth valve port is communicated with an outlet of the compressor 1; the four-way valve 5 has a first state in which the first port communicates with the second port and a second state in which the first port communicates with the fourth port, and the first port to the fourth port of the four-way valve 5 are numbered 1, 2, 3, and 4 in order in fig. 1 and 2.
Specifically, according to the characteristics of the four-way valve 5, the four-way valve controls the switching of the conduction states of the four corresponding valve ports by controlling the left and right movements of the valve core therein, so that when the four-way valve 5 is in a first state that the first valve port is communicated with the second valve port, the third valve port and the fourth valve port of the four-way valve 5 are correspondingly communicated, and at the moment, the air conditioner system is in a heating circulation state; when the four-way valve 5 is in the second state that the first valve port and the fourth valve port are communicated, the second valve port and the third valve port of the four-way valve 5 are correspondingly communicated, and at the moment, the air conditioner system is in a refrigeration cycle state.
Further, the present embodiment further includes a control system, and the control system is configured to control the four-way valve 5 to switch between the first state and the second state.
Specifically, as can be seen from the above description, the control system controls the four-way valve 5 to switch between the first state and the second state, and accordingly, the control system can control the switching between the heating cycle state and the cooling cycle state of the heat pump type air conditioning system. In the actual control process, a single chip microcomputer or a PLC (programmable logic controller) can be selected as a control system, and the control system is realized by controlling the energization state of a coil on an inner valve core of the four-way valve 5, namely, the valve core is driven by electromagnetic force generated by coil excitation and moves to the right when the four-way valve is energized, so that the four-way valve 5 is switched to a second state, and the valve core is driven by a spring arranged in the four-way valve 5 and moves to the left when the four-way valve is de-energized, so that the four-way valve 5 is switched.
Further, in the present embodiment, the control system is respectively connected to the compressor 1 and the throttling element 3; the compressor 1 is a variable frequency compressor 1, and the throttling element 3 is an electronic expansion valve.
Specifically, the control system may further include a frequency converter to perform frequency conversion control on the compressor 1, so as to cope with various load changes of the air conditioning system in different environments, and when the electronic expansion valve is used as the throttling element 3, the control system may control the operating state of the electronic expansion valve, so that the refrigerant flow rate of the air conditioning system can be well matched with the operating mode of the whole system in the cooling and heating modes.
Furthermore, the embodiment also includes that difluoromethane is adopted as the refrigerant of the heat pump type air conditioning system.
Specifically, difluoromethane is also called as R32, and R32 refrigerant is gradually becoming a substitute for R410A refrigerant due to its low global warming potential and good thermal properties, and compared with R410A refrigerant, R32 refrigerant has the advantages of good environmental protection property, large volume cooling capacity, small relative charging amount, and the like, but because its volume cooling capacity is large, efficiency is high, and its exhaust temperature is also higher than other refrigerants, especially in winter heating mode, because outdoor environment temperature is low, evaporation temperature becomes very low accordingly, so that compressor 1 pressure ratio is increased, power consumption is increased, and exhaust temperature is high. However, the present embodiment is designed to reduce the suction temperature and discharge temperature of the compressor 1 by fully utilizing the excellent characteristics of the R32 refrigerant in combination with the draft tube 6 and the on-off valve 7 provided at the outdoor heat exchanger 4, thereby optimizing the operation efficiency of the entire air conditioning system as a whole while ensuring the long-term operation stability and safety of the compressor 1.
Further, in this embodiment, the indoor heat exchanger 2 and the outdoor heat exchanger 4 are fin-and-tube heat exchangers, and fans 9 are disposed on one sides of the indoor heat exchanger 2 and the outdoor heat exchanger 4, respectively.
Specifically, the heat efficiency of the tube-fin heat exchanger, which is a known compact heat exchanger in the field, is much higher than that of a shell-and-tube heat exchanger, and the fan 9 is arranged on one side of the corresponding tube-fin heat exchanger, so that the heat exchange effect of the indoor heat exchanger 2 and the outdoor heat exchanger 4 is enhanced, particularly, the cooling or heating effect of the indoor heat exchanger 2 on the indoor environment is conveniently and rapidly improved, and the use comfort experience of household personnel is improved.
Further, referring to fig. 3, an embodiment of the present invention further provides a control method of the heat pump type air conditioning system, including:
when a heating cycle is carried out, the four-way valve is set to be in a first state, the switch valve is switched on, the drainage tube drains refrigerant from a refrigerant pipeline inside or on the inlet side of the outdoor heat exchanger, and the drained refrigerant is conveyed to a refrigerant pipeline on the outlet side of the outdoor heat exchanger;
when the refrigeration cycle is carried out, the four-way valve is set to be in a second state, and the switch valve is cut off.
As can be seen from the above, the control method shown in this embodiment is to switch the first state and the second state by controlling the four-way valve in a conventional manner, so that the air conditioning system enters the heating cycle state or the cooling cycle state, in order to improve the exhaust temperature of the compressor when the air conditioning system performs the heating cycle, only during the heating cycle, the drainage tube is connected by controlling the switch valve on the drainage tube, which is simple and convenient in control operation, especially when the switch valve adopts a one-way stop valve, the one-way stop valve can automatically conduct or stop according to the flow direction of the refrigerant in the air conditioning system without independent control, therefore, the control cost is low, the stability and the safety of the compressor in long-term operation are ensured, the shutdown of the air conditioning system caused by the protection of the exhaust temperature of the compressor can be avoided, and the long-term stable operation of the air conditioning system in the heating mode is further ensured.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. A heat pump type air conditioning system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a throttling element, wherein the indoor heat exchanger and the outdoor heat exchanger are communicated with the compressor through a four-way valve, and the throttling element is arranged between the indoor heat exchanger and the outdoor heat exchanger in series; it is characterized by also comprising a drainage tube and a switch valve;
one end of the drainage tube is communicated with the inside of the outdoor heat exchanger or a refrigerant pipeline close to the throttling element side, the other end of the drainage tube is communicated with the refrigerant pipeline close to the four-way valve side of the outdoor heat exchanger, and the switch valve is installed on the drainage tube.
2. A heat pump air conditioning system according to claim 1,
the switching valve is a one-way stop valve, and the conducting direction of the one-way stop valve is the flowing direction of the refrigerant flowing from the refrigerant pipeline inside the outdoor heat exchanger or on the side close to the throttling element to the refrigerant pipeline on the side close to the four-way valve of the outdoor heat exchanger.
3. A heat pump air conditioning system according to claim 1,
a first valve port of the four-way valve is communicated with the outdoor heat exchanger, a second valve port of the four-way valve is communicated with an inlet of the compressor, a third valve port of the four-way valve is communicated with the indoor heat exchanger, and a fourth valve port of the four-way valve is communicated with an outlet of the compressor;
the four-way valve has a first state in which the first valve port is communicated with the second valve port, and a second state in which the first valve port is communicated with the fourth valve port.
4. A heat pump air conditioning system according to claim 3,
the four-way valve is used for switching between the first state and the second state.
5. A heat pump air conditioning system according to claim 4,
the control system is respectively connected with the compressor and the throttling element;
the compressor is a variable frequency compressor, and the throttling element is an electronic expansion valve.
6. A heat pump air conditioning system according to claim 1,
also included is difluoromethane refrigerant located within the refrigerant lines.
7. A heat pump air conditioning system according to claim 1,
the indoor heat exchanger and the outdoor heat exchanger are respectively tube-fin heat exchangers, and fans are respectively arranged on one sides of the indoor heat exchanger and the outdoor heat exchanger.
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| CN201922024687.3U CN211575589U (en) | 2019-11-21 | 2019-11-21 | Heat pump type air conditioning system |
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| CN201922024687.3U CN211575589U (en) | 2019-11-21 | 2019-11-21 | Heat pump type air conditioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849019A (en) * | 2019-11-21 | 2020-02-28 | 青岛海尔空调器有限总公司 | Heat pump type air conditioning system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849019A (en) * | 2019-11-21 | 2020-02-28 | 青岛海尔空调器有限总公司 | Heat pump type air conditioning system and control method thereof |
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