CN110006165B - Protection device and protection method for low-temperature defrosting and high-temperature prevention and air conditioner - Google Patents

Abstract

The invention provides a protection device and a protection method for low-temperature defrosting and high-temperature prevention and an air conditioner, and relates to the technical field of air conditioners, comprising a water receiving disc, a buffer water tank, a heat pipe, a cooling jacket, a water tank, a water pump and a valve; the water receiving disc is communicated with the buffer water tank; two ends of the heat pipe are respectively inserted into the buffer water tank and the outdoor condenser; the cooling jacket is sleeved outside the compressor, the buffer water tank is communicated with the cooling jacket, and the cooling jacket is provided with a water outlet pipe; the cooling jacket, the water pump and the water tank are communicated with the buffer water tank to form a circulation passage; the valve comprises a first valve, a second valve and a third valve. The protection device and the protection method for low-temperature defrosting and high-temperature prevention and the air conditioner can prevent the air conditioner from refrigerating high Wen Tingji in summer; meanwhile, the circulating water is heated by utilizing heat dissipation of the compressor, the temperature of the compressor is reduced, and meanwhile, the external condenser is heated, so that the air conditioner can be heated in winter and does not frost.

Description

Protection device and protection method for low-temperature defrosting and high-temperature prevention and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a protection device and a protection method for low-temperature defrosting and high-temperature prevention and an air conditioner.

Background

With the development of air conditioning technology, people choose to adopt a heat pump type air conditioner to heat in winter to supply heat, so that the air conditioner is an energy-saving heat supply mode. However, when the air-cooled heat pump operates under the working condition that the outdoor environment temperature is lower than about 5 ℃, the surface temperature of the evaporator is likely to be lower than 0 ℃, frosting phenomenon can occur on the surface of the outdoor heat exchanger, the frosting can reduce air channels among fins, the heat resistance of the heat exchanger is increased, and the performance of the heat exchanger is rapidly deteriorated, so that defrosting is required after the frost layer of the outdoor heat exchanger reaches a certain thickness. The most widely used defrosting method at present adopts four-way valve reversing reverse circulation to convert the outdoor heat exchanger into a condenser, the method is simple to operate, no additional components are needed, but the greatest disadvantage of the defrosting mode is that the indoor heat supply is completely suspended during defrosting, and heat is also needed to be absorbed from the indoor for defrosting, so that the indoor comfort is seriously affected; in addition, the frequent start-stop and the large pressure fluctuation of the defrosting method can form larger impact on equipment such as a compressor and the like, and the use reliability of the equipment is affected.

When the heat pump type air conditioner is adopted for refrigeration in summer and the external temperature is higher, the ambient temperature of the air conditioner may be higher than 55 ℃, so that the heat dissipation capacity of the condenser of the air conditioner is reduced, the refrigeration effect of the air conditioner is greatly reduced, and even the air conditioner is high Wen Tingji and cannot be used.

Therefore, there is a need for a protection device capable of eliminating the adverse state of an air conditioner in a low-temperature and high-temperature state, and a solution for cooling the air conditioner in a high-temperature condition and defrosting the air conditioner in a low-temperature condition is needed in order to obtain a good use effect of the air conditioner in a summer high-temperature weather.

Disclosure of Invention

The invention solves the problems that the air conditioner is easy to frost when heating in a low temperature state, and the refrigerating effect of the air conditioner is poor, and the air conditioner is stopped or even damaged due to the fact that the temperature of the air conditioner is too high in a high temperature state.

In order to solve the problems, the invention provides a protection device with low-temperature defrosting and high-temperature prevention, which comprises a water receiving disc, a buffer water tank, a heat pipe, a cooling jacket, a water tank, a water pump and a valve;

the water receiving disc is arranged below the indoor evaporator and is communicated with the buffer water tank;

one end of the heat pipe is inserted into the buffer water tank, and the other end of the heat pipe is inserted into the outdoor condenser;

the cooling jacket is sleeved outside the compressor, the buffer water tank is communicated with the cooling jacket, and the cooling jacket is provided with a water outlet pipe;

the cooling jacket, the water pump and the water tank are sequentially communicated, and the water tank is communicated with the buffer water tank to form a circulation passage;

the valve comprises a first valve, a second valve and a third valve, wherein the first valve is arranged between the water receiving disc and the buffer water tank, the second valve is arranged at the water outlet pipe, and the third valve is arranged between the water pump and the cooling jacket or the water tank.

When the outdoor condenser is operated for heating in winter, the heat generated by the compressor is started, and the outdoor condenser is heated by taking water as a medium, so that the outdoor machine is not frosted in a low-temperature environment; when the refrigerating machine operates in summer, the cooling treatment of the outdoor unit is realized by utilizing the condensed water discharged from the indoor unit.

Optionally, a first tee joint is arranged on a first connecting pipeline of the water receiving disc and the buffer water tank, and three ports of the first tee joint are respectively communicated with the water receiving disc, the buffer water tank and the water tank, so that the structure is simplified, and the utilization rate of the pipeline is improved.

Optionally, the first valve is arranged between the water receiving disc and the first tee joint, and when the first valve is closed, water in the water receiving disc cannot flow into the buffer water tank and the water tank.

Optionally, the valve further includes a fourth valve, the fourth valve is disposed between the water tank and the first tee, and the fourth valve is closed, so that condensed water in the water receiving tray can be prevented from flowing into the water tank, water in the water tank can be prevented from flowing back to the water receiving tray due to some uncontrollable factors, and water in the water receiving tray is prevented from being excessively poured.

Optionally, a second tee joint is arranged on a second connecting pipeline of the water pump and the cooling jacket, and three ports of the second tee joint are respectively connected with the water pump, the cooling jacket and the water outlet pipe, so that the structure is simplified, and the utilization rate of the pipeline is improved

Optionally, when the third valve is arranged between the water pump and the cooling jacket, the third valve is arranged between the water pump and the second tee joint, and controls the opening and closing of pipelines between the water tank and the water outlet pipe as well as between the cooling jacket.

Optionally, the water pan has a higher level than the buffer water tank, so that condensed water in the water pan can enter the buffer water tank under the action of gravity.

Optionally, one end of the heat pipe inserted into the outdoor condenser sequentially penetrates through the fins, so that the heat pipe is ensured to be fully connected with the fins, and the heat transfer efficiency of the heat pipe to the outdoor condenser is improved.

Optionally, a heat conducting sheet is arranged at one end of the heat pipe inserted into the buffer water tank, so that the heat exchange efficiency of the heat pipe is increased.

Optionally, the outside cover of cooling jacket is equipped with the heat preservation cotton, prevents that the water in the cooling jacket from carrying out heat exchange with the environment, has improved the energy exchange of cooling jacket and compressor.

Another object of the present invention is to provide an air conditioner, wherein the protection device is mounted in the air conditioner or is disposed outside the air conditioner, and the air conditioner has a more stable working state, and can heat under low temperature condition and cool under high temperature condition.

Another object of the present invention is to provide a protection method for both low-temperature defrosting and high-temperature prevention, which collects condensed water generated by an indoor evaporator and cools an outdoor condenser and/or a compressor when an air conditioner is operated in a cooling mode;

when the air conditioner heating mode is operated, the external circulating water is led to the compressor for heating, meanwhile, the temperature of the compressor is reduced, the heated circulating water is led to the outdoor condenser for heat transfer, and the circulating water is recycled to the compressor for heating after heat transfer, so that the circulating water is circulated.

The protection method is simple and feasible, improves the energy utilization rate, and provides an air conditioner solution which takes the defrosting in winter and the high-temperature shutdown prevention in summer into consideration.

Drawings

FIG. 1 is a schematic view of a protection device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a heat pipe according to an embodiment of the present invention;

FIG. 3 is a schematic view of a cooling jacket according to an embodiment of the present invention;

fig. 4 is a schematic working diagram of the protection device according to the embodiment of the invention when the air conditioner is refrigerating;

fig. 5 is a schematic working diagram of the protection device according to the embodiment of the invention when an air conditioner heats.

Reference numerals illustrate:

1-water receiving disc, 2-buffer water tank, 3-heat pipe, 31-heat conducting sheet, 4-cooling jacket, 41-water outlet pipe, 42-sleeve, 43-first through hole, 44-second through hole, 5-water tank, 6-water pump, 7-valve, 71-first valve, 72-second valve, 73-third valve, 74-fourth valve, 8-first connecting pipeline, 81-first tee joint, 9-second connecting pipeline and 91-second tee joint.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present invention, it should be noted that the terms "first," "second," and "second" in the embodiments are merely used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

With the improvement of living standard of people and the development of air conditioning technology, more people use the air conditioner to heat in winter, wherein the heat pump type air conditioner heats and is an energy-saving heat supply mode, the functions of an evaporator and a condenser of the air conditioner are exchanged through the change of a four-way reversing valve, and the refrigerating function of an indoor unit is changed into the heating function.

However, when the heat pump type air conditioner heats, especially under the condition of low outdoor environment temperature, the temperature of the surface of the evaporator is extremely likely to be reduced below zero, so that the frosting phenomenon of the heat exchanger occurs, the air channels of the fins are reduced, the heat resistance of the heat exchanger is increased, the performance of the heat exchanger is rapidly deteriorated, and defrosting is required. At present, a common defrosting method adopts four-way valve reversing reverse circulation, namely, a high-temperature refrigerant reversely enters a frosted heat exchanger and is defrosted at a high temperature, but the defrosting process needs to completely suspend heating indoors because of the reversing of the four-way valve, and heat is required to be absorbed from the indoors for defrosting, so that the indoor comfort is seriously affected; in addition, the defrosting method is frequently started and stopped, and the large fluctuation of pressure can cause large impact on equipment such as a compressor and the like, so that the service life is shortened.

When the heat pump type air conditioner is used for refrigerating, particularly when the outdoor environment temperature is high, the heat dissipation function of the air conditioner condenser is greatly reduced, the refrigerating effect of the air conditioner is insufficient, and even the compressor temperature is too high, the air conditioner is stopped and damaged, so that the heat dissipation treatment of the air conditioner is needed.

The invention aims at the problems and provides a protection device combining low-temperature defrosting and high-temperature prevention, which is shown in the figure 1 and comprises a water receiving disc 1, a buffer water tank 2, a heat pipe 3, a cooling jacket 4, a water tank 5, a water pump 6 and a valve 7.

The water collector 1 sets up in the below of indoor evaporimeter, and water collector 1 can set up in indoor set inside, also can set up in indoor set outside as auxiliary device, but water collector 1 need set up in indoor evaporimeter below, and the condensate water that indoor evaporimeter produced can drip under the action of gravity in indoor evaporimeter, specifically, water collector 1 with buffer water tank 2 intercommunication, the condensate water in the water collector 1 can trickle to in the buffer water tank 2.

Preferably, when installing the water pan 1 and the buffer water tank 2, the height of the water pan 1 is higher than that of the buffer water tank 2, and the connecting pipeline from the water pan 1 to the buffer water tank 2 is gradually reduced, so that the condensation water in the water pan 1 can flow into the buffer water tank 2 under the action of gravity.

The heat pipe 3 is a heat transfer element with high heat conduction performance, has high heat transfer efficiency, compact structure and small fluid resistance loss, transfers heat through evaporation and condensation of working media in the totally-enclosed vacuum tube shell, has a series of advantages of extremely high heat conduction, good isothermicity, arbitrary change of heat transfer areas at two sides of cold and hot, long-distance heat transfer, temperature control and the like, adopts the heat pipe 3 as a heat transfer element, combines the heat pipe 3 as shown in fig. 2, is a horizontally placed cored heat pipe, is internally filled with refrigerant, depends on internal capillary force as circulating power, has any one end heated as an evaporation end and the other end externally dissipates heat as a condensation end; on the contrary, any one end is used as a condensing end, and the other end is used as an evaporating end, so that the device for simultaneously heating and refrigerating is realized.

One end of the heat pipe 3 is inserted into the buffer water tank 2 and is contacted with water flowing in the buffer water tank 2, the other end of the heat pipe 3 is inserted into the interior of the outdoor condenser, preferably, such as an air conditioner heat exchange pipe and fin combined structure, one end of the heat pipe 3 inserted into the outdoor condenser sequentially penetrates through the fins, the heat pipe 3 is ensured to be fully connected with the fins, and the heat transfer efficiency of the heat pipe 3 to the outdoor condenser is improved.

Preferably, the heat pipe 3 is inserted into the buffer water tank 2 and provided with a heat conducting fin 31 at one end, and the heat conducting fin 31 can be made of copper, aluminum or other metals with good heat conducting performance, and the heat conducting fin 31 is multiple, and the heat conducting fins 31 are arranged at intervals at one end, inserted into the buffer water tank 2, of the heat pipe 3, so that the heat exchange efficiency of the heat pipe 3 is increased.

The cooling jacket 4 is sleeved outside the compressor, the buffer water tank 2 is communicated with the cooling jacket 4, water in the buffer water tank 2 can flow into the cooling jacket 4, and water in the cooling jacket 4 can also flow into the buffer water tank 2.

The cooling jacket 4 is provided with a water outlet pipe 41, and water in the cooling jacket 4 can be discharged through the water outlet pipe 41; preferably, the outside cover of cooling jacket 4 is equipped with the heat preservation cotton, can keep warm the water in the cooling jacket 4, prevents that the water in the cooling jacket 4 from carrying out heat exchange with the environment, has improved the energy exchange of cooling jacket 4 and compressor.

Specifically, as shown in fig. 3 and fig. 4, the cooling jacket 4 includes a sleeve 42, a first through hole 43 and a second through hole 44, the sleeve 42 is of a hollow structure, the sleeve 42 is a cylindrical shell which is wrapped on the surface of the compressor and can be internally communicated with water, the water flows in an internal channel to take away heat generated on the surface of the compressor, and the heat generated on the surface of the compressor is transferred to the water in the sleeve, so that the water can be heated; the first through hole 43 and the second through hole 44 are both communicated with the inner cavity of the sleeve 42, specifically, the first through hole 43 is higher than the second through hole 44, the first through hole 43 is located at a position where the side wall of the sleeve 42 is close to the top, the second through hole 44 is located at a position where the side wall of the sleeve 42 is close to the bottom, the first through hole 43 is communicated with the water pump 6, the second through hole 44 is communicated with the buffer water tank 2, alternatively, the first through hole 43 can be communicated with the buffer water tank 2, and the second through hole 44 can be communicated with the water pump 6.

The buffer water tank 2, the cooling jacket 4, the water pump 6 and the water tank 5 are sequentially communicated, and the water tank 5 is communicated with the buffer water tank 2 through another pipeline to form a circulation passage;

specifically, the valve 7 includes a first valve 71, a second valve 72 and a third valve 73, the first valve 71 is disposed between the water receiving tray 1 and the buffer water tank 2, the first valve 71 is opened, the condensed water in the water receiving tray 1 flows into the buffer water tank 2, and when the first valve 71 is closed, the water receiving tray 1 and the buffer water tank 2 are disconnected; the second valve 72 is arranged at the water outlet pipe 41, when the second valve 72 is opened, water in the buffer water tank 2 can be discharged through the water outlet pipe 41, and when the second valve 72 is closed, the water outlet pipe 41 is closed; the third valve 73 is arranged between the water pump 6 and the cooling jacket 4 or the water tank 5, when the third valve 73 is opened, the water pump 6 can pump water in the water tank 5 into the cooling jacket 4, and when the third valve 73 is closed, the communication between the water pump 6 and the water tank 5 is blocked.

Better, combine the fig. 1 to show, water collector 1 is connected through first connecting line 8 with buffer tank 2, is equipped with first tee bend 81 on the first connecting line 8, and water collector 1, buffer tank 2 and water tank 5 are linked respectively to three port of first tee bend 81, and at this moment, water tank 5 and water collector 1 two common pipeline of device and buffer tank 2 intercommunication have simplified the structure, have improved the utilization ratio of pipeline.

Specifically, as shown in fig. 1, the first valve 71 is disposed between the water receiving tray 1 and the first tee 81, and when the first valve 71 is closed, water in the water receiving tray 1 does not flow into the buffer water tank 2 and the water tank 5.

Specifically, as shown in fig. 1, the valve 7 further includes a fourth valve 74, where the fourth valve 74 is disposed between the water tank 5 and the first tee 81, and when the first valve 71 is opened, the fourth valve 74 is closed, so that condensed water in the water receiving tray 1 can be prevented from flowing into the water tank 5, and water in the water tank 5 can also be prevented from flowing backward to the water receiving tray 1 due to some uncontrollable factors, and the water in the water receiving tray 1 is prevented from being excessively poured.

Optionally, the water pump 6 is connected with the cooling jacket 4 through a second connecting pipeline 9, a second tee joint 91 is arranged on the second connecting pipeline 9, three ports of the second tee joint 91 are respectively communicated with the cooling jacket 4, the water pump 6 and the water outlet pipe 41, and the water outlet pipe 41 is connected with the second connecting pipeline 9 through three paths, so that the utilization rate of the pipeline is improved, and the pipeline structure is simplified; with this structure, when the third valve 73 is provided between the water pump 6 and the cooling jacket 4, the third valve 73 is preferably provided between the water pump 6 and the second tee 91, and controls the opening and closing of the pipes between the water tank 5 and the water outlet pipe 41 and between the cooling jacket 4.

Specifically, the protection device can be carried in the air conditioner, can also be used as an auxiliary device and arranged on the outer side of the air conditioner to protect the air conditioner from high-temperature refrigeration and low-temperature heating, and when the air conditioner is operated for heating in winter, the heat generated by the compressor is started, and the outdoor condenser is heated by taking water as a medium, so that the outdoor unit is not frosted in a low-temperature environment; when the refrigerating machine operates in summer, the cooling treatment of the outdoor unit is realized by utilizing the condensed water discharged from the indoor unit.

Referring to fig. 4, the working principle of the protection device when the air conditioner is refrigerating is as follows: when the air conditioner operates for refrigeration in summer, the compressor operates, the outdoor condenser releases heat, and the indoor evaporator absorbs heat for refrigeration; along with the continuous operation of the compressor, the surface of the indoor evaporator generates condensation water, and the water receiving disc 1 collects the condensation water; at this time, the first valve 71 and the second valve 72 are opened, the third valve 73 and the fourth valve 74 are closed, the generated condensed water enters the buffer water tank 2 through the first valve 71 and the second valve 72 under the action of gravity, exchanges heat with the heat pipe 3 in the buffer water tank 2, and transfers the cold energy to one end of the heat pipe 3 inserted into the outdoor condenser, so that the cooling of the condenser is realized, the condensed water after the heat exchange enters the cooling jacket 4 after coming out of the buffer water tank 2, the cooling of the compressor is continued, the surface temperature of the compressor is very high under the high-temperature environment, the cooling of the compressor is realized, the service life of the compressor can be prolonged, and the stable operation of the air conditioner is realized; finally, the air is discharged through the second valve 72, the dual cooling functions of the outdoor condenser and the compressor are realized through the condensation water, the heat pipe 3 and the cooling jacket 4 in the whole process, the stable operation of the air conditioner is facilitated under the high-temperature environment, and the problems of poor heat dissipation and high-temperature shutdown of the air conditioner in summer can be well prevented.

Referring to fig. 5, the working principle of the protection device when the air conditioner heats is as follows: when the air conditioner heats in winter, the compressor operates, the indoor evaporator releases heat, the outdoor condenser absorbs heat, the surface temperature of the outdoor condenser is lower and higher along with the continuous operation of the air conditioner, the first valve 71 and the second valve 72 are closed, and the third valve 73, the fourth valve 74 and the water pump 6 are opened; under the action of the water pump 6, water in the water tank 5 enters the cooling jacket 4 through the third valve 73, and the water in the cooling jacket 4 is heated through heat emitted from the surface of the compressor, so that the temperature of the compressor can be reduced; the heated water enters the buffer water tank 2 and exchanges heat with the heat pipe 3, and the heat is transferred to the outdoor condenser to heat the outdoor condenser, and the water coming out of the buffer water tank 2 enters the water tank 5 through the fourth valve 74, so that the circulation is realized; therefore, the surface temperature of the outdoor condenser is higher than 0 ℃, the heating operation of the air conditioner is not frosted, the surface temperature of the condenser is improved in a cold environment, the heating of the air conditioner can be facilitated, and the use comfort of the air conditioner in winter is better improved.

In summary, the invention provides a protection method for low-temperature defrosting and high-temperature prevention, which comprises the following steps: when the air conditioner is operated in the refrigerating mode, collecting condensation water generated by the indoor evaporator and cooling the outdoor condenser and/or the compressor; when the air conditioner heating mode is operated, the external circulating water is led to the compressor for heating, meanwhile, the temperature of the compressor is reduced, the heated circulating water is led to the outdoor condenser for heat transfer, and the circulating water is recycled to the compressor for heating after heat transfer, so that the circulating water is circulated. The method realizes the cooling treatment of the outdoor unit and can prevent the air conditioner from refrigerating up to Wen Tingji in summer; meanwhile, the circulating water is radiated and heated by the compressor, the temperature of the compressor is reduced, and meanwhile, the external condenser is heated, so that the air conditioner can be heated in winter without frosting, and a good heating effect is maintained in a temperature-reduced environment.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims (10)

1. The protection device with low-temperature defrosting and high-temperature prevention functions is characterized by comprising a water receiving disc (1), a buffer water tank (2), a heat pipe (3), a cooling jacket (4), a water tank (5), a water pump (6) and a valve (7);

the water receiving disc (1) is arranged below the indoor evaporator, and the water receiving disc (1) is communicated with the buffer water tank (2);

one end of the heat pipe (3) is inserted into the buffer water tank (2), and the other end of the heat pipe (3) is inserted into the interior of the outdoor condenser;

the cooling jacket (4) is sleeved outside the compressor, the cooling jacket (4), the water pump (6), the water tank (5) and the buffer water tank (2) are sequentially communicated end to form a circulation passage, and the cooling jacket (4) is provided with a water outlet pipe (41);

the valve (7) comprises a first valve (71), a second valve (72) and a third valve (73), the first valve (71) is arranged between the water receiving disc (1) and the buffer water tank (2), the second valve (72) is arranged at the water outlet pipe (41), and the third valve (73) is arranged between the water pump (6) and the cooling jacket (4) or the water tank (5);

the horizontal height of the water receiving disc (1) is higher than that of the buffer water tank (2);

one end of the heat pipe (3) inserted into the outdoor condenser sequentially penetrates through the fins.

2. The protection device with low-temperature defrosting and high-temperature prevention according to claim 1, wherein a first tee joint (81) is arranged on a first connecting pipeline (8) of the water receiving disc (1) and the buffer water tank (2), and three ports of the first tee joint (81) are respectively communicated with the water receiving disc (1), the buffer water tank (2) and the water tank (5).

3. The protection device combining low-temperature defrosting and high-temperature prevention according to claim 2, characterized in that the first valve (71) is provided between the water pan (1) and the first tee joint (81).

4. The combined low temperature defrost and high temperature protection device according to claim 2, wherein the valve (7) further comprises a fourth valve (74), the fourth valve (74) being arranged between the water tank (5) and the first tee (81).

5. The protection device with low-temperature defrosting and high-temperature prevention according to claim 1, wherein a second tee joint (91) is arranged on a second connecting pipeline (9) of the water pump (6) and the cooling jacket (4), and three ports of the second tee joint (91) are respectively connected with the water pump (6), the cooling jacket (4) and the water outlet pipe (41).

6. The low-temperature defrosting and high-temperature protection device according to claim 5, wherein when the third valve (73) is disposed between the water pump (6) and the cooling jacket (4), the third valve (73) is disposed between the water pump (6) and the second tee (91).

7. The device for protecting both low-temperature defrosting and high-temperature prevention according to claim 1, wherein a heat conducting sheet (31) is provided at one end of the heat pipe (3) inserted into the buffer water tank (2).

8. The device for protecting the evaporator from both low-temperature defrosting and high-temperature protection as claimed in claim 1, wherein the outside of the cooling jacket (4) is sleeved with heat-insulating cotton.

9. An air conditioner characterized in that the protection device according to any one of claims 1 to 8 is mounted in the air conditioner or is provided outside the air conditioner.

10. The method for protecting the air conditioner according to claim 9 from both low-temperature defrosting and high-temperature protection, comprising:

when the air conditioner is operated in the refrigerating mode, collecting condensation water generated by the indoor evaporator and cooling the outdoor condenser and/or the compressor;

when the air conditioner heating mode is operated, the external circulating water is led to the compressor for heating, meanwhile, the temperature of the compressor is reduced, the heated circulating water is led to the outdoor condenser for heat transfer, and the circulating water is recycled to the compressor for heating after heat transfer, so that the circulating water is circulated.

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