A gas heat pump multi-connected system, a control method and an air conditioner

Abstract

The application discloses a kind of gas heat pump equipment technical field's gas heat pump multi-connected system, control method and air conditioner, to solve the problem of poor recycling effect of engine waste heat in different situations in prior art gas heat pump unit.It includes working system, heat recovery system and engine system, working system includes first compressor, oil separator, four-way valve, outdoor unit heat exchanger, indoor unit heat exchanger and gas-liquid separator;Heat recovery system includes second compressor, indoor unit condenser, heat recovery electronic expansion valve and heat recovery unit;Engine system includes water pump, engine, three-way valve and radiator;The application separates heat recovery system from working system, so that they are independent of each other, do not interfere with each other, and sends the waste heat of engine to the air outlet of indoor unit heat exchanger, recycles and utilizes the waste heat of engine in different situations, and ensures the actual use effect of gas heat pump unit.

Description

TECHNICAL FIELD

[0001] The present application relates to a gas heat pump multi-connected system, a control method and an air conditioner, and belongs to the technical field of gas heat pump equipment. BACKGROUND

[0002] Different user groups often have different requirements for the air outlet temperature of the indoor unit. For example, when the ambient humidity is high, dehumidification by the air conditioner is needed to reduce the humidity. However, the air outlet temperature of the conventional air conditioning system is often low when dehumidifying, resulting in poor comfort. The conventional air conditioning system with reheating function uses the heat condensed by the air conditioner to increase the air outlet temperature, which will cause the condensing pressure to drop, affecting the reliability of the unit.

[0003] A gas heat pump air conditioner is an air conditioning system that uses a gas engine to drive a compressor to complete refrigeration and heating operation. Compared with traditional electric air conditioners, a gas heat pump can recover engine waste heat. The engine waste heat of a conventional gas heat pump is used to improve low-temperature heating effect. Since the waste heat recovery device is arranged on the low-pressure side of the refrigeration system, the high engine heat in extremely low-temperature environments will cause the evaporation pressure of the refrigeration system to rise, thereby reducing the heat exchange efficiency of the evaporator for air exchange. When refrigerating, the engine waste heat is directly discharged into the air, causing waste. The existing gas heat pump unit has poor recovery and utilization effect of engine waste heat under different conditions, which is prone to waste and affects the actual use effect of the gas heat pump unit. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and provide a gas heat pump multi-connected system, a control method and an air conditioner to solve the problem of poor recovery and utilization effect of engine waste heat of a gas heat pump unit under different conditions.

[0005] To solve the above technical problems, the present application adopts the following technical scheme:

[0006] In a first aspect, the present application provides a gas heat pump multi-connected system, comprising a working system, a heat recovery system and an engine system; the working system is used to perform refrigeration, dehumidification or heating work, and comprises an indoor unit heat exchanger; the engine system is used to recover engine waste heat;

[0007] The heat recovery system comprises a second compressor, an output end of the second compressor is connected with an indoor unit condenser, the indoor unit condenser is connected with a heat recovery electronic expansion valve, the heat recovery electronic expansion valve is connected with a heat recovery device, the heat recovery device is connected with an input end of the second compressor, the heat recovery system is used for sending waste heat to an air outlet of the indoor unit heat exchanger in the working system, and the waste heat is used for reheating to increase the outlet temperature when refrigeration or dehumidification is performed; the waste heat is used for increasing the air outlet temperature of the air outlet and does not affect heat exchange between refrigerant and air when heating is performed.

[0008] Further, the working system comprises a first compressor, an output end of the first compressor is connected with an input end of an oil separator, an output end of the oil separator is connected with an input end of the first compressor, the output end of the oil separator is connected with a first end of a four-way valve, a second end of the four-way valve is connected with an outdoor unit heat exchanger, the outdoor unit heat exchanger is connected with an outdoor unit electronic expansion valve, the outdoor unit electronic expansion valve is connected with an indoor unit electronic expansion valve, the indoor unit electronic expansion valve is connected with an indoor unit heat exchanger, the indoor unit heat exchanger is connected with a third end of the four-way valve, a fourth end of the four-way valve is connected with an input end of a gas-liquid separator, an output end of the gas-liquid separator is connected with an input end of the first compressor, the outdoor unit heat exchanger is provided with a first fan, and the indoor unit heat exchanger is provided with a second fan.

[0009] Further, the engine system comprises a water pump and an engine for delivering power to the first compressor and the second compressor, an output end of the water pump is connected with an input end of an engine internal pipeline, an output end of the engine internal pipeline is connected with an inlet of a three-way valve, a first outlet of the three-way valve is connected with the heat recovery device, the heat recovery device is connected with an input end of the water pump, a second outlet of the three-way valve is connected with a radiator, and the radiator is connected with an input end of the water pump.

[0010] The first compressor and the second compressor are each provided with a clutch, the indoor unit heat exchanger and the indoor unit condenser are arranged side by side and closely close to each other, and the outdoor unit heat exchanger and the radiator are arranged side by side and closely close to each other.

[0011] Further, the first compressor and the second compressor are each driven by a belt.

[0012] Further, the indoor unit heat exchanger and the indoor unit condenser are each provided with a valve at two ends.

[0013] Further, an opening range of the three-way valve is [0, 100].

[0014] In a second aspect, the present application provides a gas heat pump multi-connected system control method, which adopts the gas heat pump multi-connected system of the first aspect, and comprises: confirming the working state of the second compressor according to the working mode of the current system;

[0015] obtaining the outlet air temperature of the indoor heat exchanger, comparing the outlet air temperature with a preset value, and adjusting the waste heat recovery state of the heat recovery device according to the comparison result and the working mode of the system;

[0016] The working mode comprises a refrigeration mode, a dehumidification mode and a heating mode.

[0017] Further, confirming the working state of the second compressor according to the working mode of the current system comprises:

[0018] If the working mode is the refrigeration mode, the second compressor is in a closed state;

[0019] If the working mode is the dehumidification mode, the second compressor is in an open state;

[0020] If the working mode is the heating mode, the second compressor is in an open state.

[0021] Further, obtaining the outlet air temperature of the indoor heat exchanger, comparing the outlet air temperature with a preset value, and adjusting the waste heat recovery state of the heat recovery device according to the comparison result and the working mode of the system comprises:

[0022] In the refrigeration mode:

[0023] The second compressor is in a closed state, the waste heat recovery of the heat recovery device is in a stopped state, and the work is completed;

[0024] In the dehumidification mode:

[0025] The second compressor is in an open state;

[0026] If X>X n , the waste heat recovery effect of the heat recovery device is reduced;

[0027] If X<X n , the waste heat recovery effect of the heat recovery device is increased;

[0028] If X=X n , the waste heat recovery effect of the heat recovery device is unchanged;

[0029] In the heating mode:

[0030] The second compressor is in an open state;

[0031] If X>X n , the waste heat recovery effect of the heat recovery device is reduced;

[0032] If X <X n Then the waste heat recovery effect of the heat recovery unit will increase;

[0033] If X = X n If so, the waste heat recovery effect of the heat recovery unit remains unchanged;

[0034] In the formula, X is the outlet air temperature of the indoor unit heat exchanger. n The preset temperature value.

[0035] Thirdly, the present invention provides an air conditioner, which is equipped with the gas heat pump multi-split system described in the first aspect.

[0036] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0037] This gas heat pump multi-split system separates the heat recovery system from the operating system, ensuring that the two are independent and do not interfere with each other. It also sends the engine's waste heat to the air outlet of the indoor unit's heat exchanger, thereby recovering and utilizing the engine's waste heat under different conditions and ensuring the actual performance of the gas heat pump unit. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the system structure of a gas heat pump multi-split system according to an embodiment of the present invention;

[0039] In the diagram: 1. First compressor; 2. Oil separator; 3. Four-way valve; 4. Outdoor unit heat exchanger; 5. Outdoor unit electronic expansion valve; 6. Indoor unit electronic expansion valve; 7. Indoor unit heat exchanger; 8. Gas-liquid separator; 9. Engine; 10. Three-way valve; 11. Radiator; 12. Water pump; 13. Second compressor; 14. Indoor unit condenser; 15. Heat recovery electronic expansion valve; 16. Heat recovery unit; 17. First fan; 18. Second fan. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] Example 1:

[0044] like Figure 1As shown, this invention provides a gas-fired heat pump multi-split system, including a working system, a heat recovery system, and an engine system. The working system is used to perform cooling, dehumidification, or heating operations and includes an indoor unit heat exchanger. The engine system is used to recover waste heat from the engine. The working system includes a first compressor 1, the output end of which is connected to the input end of an oil separator 2. The output end of the oil separator 2 is connected to the input end of the first compressor 1. The output end of the oil separator 2 is connected to the first end of a four-way valve 3. The second end of the four-way valve 3 is connected to an outdoor unit heat exchanger 4. The outdoor unit heat exchanger 4 is connected to the indoor unit heat exchanger 4. The outdoor unit electronic expansion valve 5 is connected to the indoor unit electronic expansion valve 6, which is connected to the indoor unit heat exchanger 7. The indoor unit heat exchanger 7 is connected to the third end of the four-way valve 3, and the fourth end of the four-way valve 3 is connected to the input end of the gas-liquid separator 8. The output end of the gas-liquid separator 8 is connected to the input end of the first compressor 1. The outdoor unit heat exchanger 4 is equipped with a first fan 17, and the indoor unit heat exchanger 7 is equipped with a second fan 18. The heat recovery system includes a second compressor 13, the output end of which is connected to the indoor unit condenser 14. The indoor unit condenser 14 is connected to a heat recovery electronic expansion valve 15, which is connected to a heat recovery unit 16. The heat recovery unit 16 is connected to the input terminal of the second compressor 13. The heat recovery system is used to send waste heat to the air outlet of the indoor unit heat exchanger within the working system. When cooling or dehumidifying, the waste heat is used for reheating to increase the outlet temperature; when heating, the waste heat is used to increase the outlet air temperature without affecting the heat exchange between the refrigerant and the air. The engine system includes a water pump 12 and an engine 9 for supplying power to the first compressor 1 and the second compressor 13. The output terminal of the water pump 12 is connected to the... The input end of the internal pipe of the engine 9 is connected to the output end of the internal pipe of the engine 9 and the inlet of the three-way valve 10. The first outlet of the three-way valve 10 is connected to the heat recovery unit 16 and the input end of the water pump 12. The second outlet of the three-way valve 10 is connected to the radiator 11 and the radiator 11 is connected to the input end of the water pump 12. Both the first compressor 1 and the second compressor 13 are equipped with clutches. The indoor unit heat exchanger 7 and the indoor unit condenser 14 are arranged side by side and closely attached. The outdoor unit heat exchanger 4 and the radiator 11 are arranged side by side and closely attached.

[0045] Specifically, the first fan 17 is used to assist the outdoor unit heat exchanger 4 in exchanging heat with the air, and the second fan 18 is used to assist the indoor unit heat exchanger 7 in exchanging heat with the air; the two clutches are used to control the opening and closing of the first compressor 1 and the second compressor 13, respectively.

[0046] In this embodiment, both the first compressor 1 and the second compressor 13 are connected to the engine 9 via belt drives to reduce vibrations generated during transmission.

[0047] Both ends of the indoor unit heat exchanger 7 and the indoor unit condenser 14 are equipped with valves to facilitate the control of the on / off of the pipes at both ends of the indoor unit heat exchanger 7 and the indoor unit condenser 14.

[0048] This embodiment also includes the three-way valve 10 having an opening range of [0, 100].

[0049] Specifically, the opening range of the three-way valve 10 is 0 to 100%, and it is used to control the cooling water flow rate of the first opening and the second opening.

[0050] Example 2:

[0051] This embodiment provides a control method for a gas-fired heat pump multi-split system, employing the gas-fired heat pump multi-split system described in Embodiment 1, including:

[0052] Based on the current system operating mode, confirm the operating status of the second compressor 13;

[0053] The outlet air temperature of the indoor unit heat exchanger 7 is obtained, and the outlet air temperature is compared with the preset value. Based on the comparison result and the working mode of the system, the waste heat recovery operation status of the heat recovery unit 16 is adjusted.

[0054] The operating modes include cooling mode, dehumidification mode, and heating mode.

[0055] When the system is operating in cooling or dehumidification mode:

[0056] The refrigerant discharged from the output end of the first compressor 1 passes through the oil separator 2 and the first end of the four-way valve 3, and then enters the interior of the four-way valve 3. At this time, the first end of the four-way valve 3 is connected to the second end, and the third end is connected to the fourth end. After the refrigerant is discharged from the second end of the four-way valve 3, it passes through the outdoor unit heat exchanger 4, the outdoor unit electronic expansion valve 5, and the indoor unit electronic expansion valve 6 in sequence, and then enters the indoor unit heat exchanger 7. After that, it passes through the third end of the four-way valve 3 and enters the four-way valve 3. After being discharged from the fourth end of the four-way valve 3, it passes through the gas-liquid separator 8 and enters the input end of the first compressor 1, completing the cycle.

[0057] When the system is in heating mode:

[0058] The refrigerant discharged from the output end of the first compressor 1 passes through the oil separator 2 and the first end of the four-way valve 3, and then enters the interior of the four-way valve 3. At this time, the first end of the four-way valve 3 is connected to the third end, and the second end is connected to the fourth end. After the refrigerant is discharged from the third end of the four-way valve 3, it passes through the indoor unit heat exchanger 7, the indoor unit electronic expansion valve 6, and the outdoor unit electronic expansion valve 5, and then enters the outdoor unit heat exchanger 4. After that, it passes through the second end of the four-way valve 3 and enters the four-way valve 3. After being discharged from the fourth end of the four-way valve 3, it passes through the gas-liquid separator 8 and enters the input end of the first compressor 1, completing the cycle.

[0059] In this embodiment, in the cooling mode:

[0060] The second compressor 13 is in the off state, at which time the waste heat recovery operation of the heat recovery unit 16 stops.

[0061] Specifically, when the system is in cooling mode, after the cooling water is discharged from the output end of the water pump 12, it passes through the three-way valve 10 and the radiator 11 and enters the input end of the water pump 12 to complete the circulation. The radiator 11 dissipates heat from the cooling water. Since the outdoor unit heat exchanger 4 and the radiator 11 are arranged side by side and closely attached, they can exchange heat fully, thereby making full use of the heat of the engine 9 and avoiding waste.

[0062] In dehumidification mode:

[0063] The second compressor 13 is in the on state, and at this time, both the first and second openings of the three-way valve 10 are in the open state. Where X > X n If the opening of the first opening of the three-way valve 10 decreases, the waste heat recovery effect of the heat recovery unit 16 will decrease.

[0064] If X <X n If the opening degree of the first opening of the three-way valve 10 increases, the waste heat recovery effect of the heat recovery unit 16 will increase.

[0065] If X = X n If the opening degree of the first opening of the three-way valve 10 remains unchanged, the waste heat recovery effect of the heat recovery unit 16 remains unchanged.

[0066] In heating mode:

[0067] The second compressor 13 is in the on state, at which time both the first and second openings of the three-way valve 10 are in the open state.

[0068] Where, if X>X n If the opening of the first opening of the three-way valve 10 decreases, the waste heat recovery effect of the heat recovery unit 16 will decrease.

[0069] If X <X nIf the opening degree of the first opening of the three-way valve 10 increases, the waste heat recovery effect of the heat recovery unit 16 will increase.

[0070] If X = X n If the opening degree of the first opening of the three-way valve 10 remains unchanged, the waste heat recovery effect of the heat recovery unit 16 remains unchanged.

[0071] In the formula, X is the outlet air temperature of the indoor unit heat exchanger 7, X n The preset temperature value;

[0072] Specifically, when the second compressor 13 is in the on state, the refrigerant discharged from the output end of the second compressor 13 passes sequentially through the indoor unit condenser 14, the heat recovery electronic expansion valve 15, and the heat recovery unit 16 before entering the input end of the second compressor 13 to complete the circulation. When both the first and second openings of the three-way valve 10 are in the on state, the cooling water discharged from the output end of the water pump 12 passes through the three-way valve 10. Part of the cooling water is discharged from the second outlet, passes through the radiator 11, and enters the input end of the water pump 12 to complete the circulation. The other part of the cooling water is discharged from the first outlet, passes through the heat recovery unit 16, and enters the input end of the water pump 12 to complete the circulation. The cooling water passing through the heat recovery unit 16 exchanges heat with the refrigerant. Then the indoor unit condenser 14 performs heat dissipation. Since the indoor unit heat exchanger 7 is arranged side by side and closely attached to the indoor unit condenser 14, the waste heat of the engine 9 is sent to the air outlet of the indoor unit heat exchanger 7.

[0073] When the system operates in dehumidification or heating mode, and X > X n When the opening of the first opening of the three-way valve 10 decreases, the flow rate of cooling water to the heat recovery unit 16 decreases, thus affecting the heat exchange operation inside the heat recovery unit 16. This reduces the waste heat recovery effect of the heat recovery unit 16. After the heat exchange operation, the temperature of the refrigerant in the heat recovery system decreases, resulting in less heat dissipated by the indoor unit condenser 14, thereby reducing the outlet air temperature of the indoor unit heat exchanger 7 and bringing it closer to the preset temperature value; when X <X n When the opening of the first opening of the three-way valve 10 increases, the flow rate of cooling water to the heat recovery unit 16 increases, the waste heat recovery effect of the heat recovery unit 16 increases, and after the heat exchange is working, the temperature of the refrigerant in the heat recovery system increases, which increases the heat dissipated by the indoor unit condenser 14, thereby increasing the outlet air temperature of the indoor unit heat exchanger 7 and bringing it closer to the preset temperature value; when X = X n If the opening degree of the first opening of the three-way valve 10 remains unchanged, the waste heat recovery effect of the heat recovery unit 16 remains unchanged.

[0074] This invention separates the heat recovery system from the operating system, making them independent and non-interfering. The waste heat from the engine 9 is sent to the air outlet of the indoor unit heat exchanger 7. In cooling mode, the heat from the engine 9 is fully utilized, avoiding waste; in dehumidification mode, the air outlet temperature of the indoor unit heat exchanger 7 is increased; and in heating mode, the air outlet temperature of the indoor unit heat exchanger 7 is increased without affecting the heat exchange between the refrigerant and the air. This allows for the recovery and utilization of engine waste heat under different conditions, ensuring the actual performance of the gas heat pump unit.

[0075] Example 3:

[0076] Based on the gas-fired heat pump multi-split system of Embodiment 1 and the gas-fired heat pump multi-split system control method of Embodiment 2, this embodiment provides an air conditioner equipped with the gas-fired heat pump multi-split system of Embodiment 1, and based on the gas-fired heat pump multi-split system control method of Embodiment 2, performs waste heat recovery and utilization of the engine under different conditions.

[0077] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A gas-fired heat pump multi-split system, characterized in that, This includes the working system, heat recovery system, and engine system; The working system is used to perform refrigeration, dehumidification or heating operations, including an indoor unit heat exchanger; The engine system is used to recover waste heat from the engine; The heat recovery system includes a second compressor, the output of which is connected to the indoor unit condenser. The indoor unit condenser is connected to a heat recovery electronic expansion valve, which is connected to a heat recovery unit. The heat recovery unit is connected to the input of the second compressor. The heat recovery system is used to send waste heat to the air outlet of the indoor unit heat exchanger within the working system. When cooling, the second compressor is in a closed state; when dehumidifying or heating, the second compressor is in a closed state. The waste heat is used to increase the outlet air temperature without affecting the heat exchange between the refrigerant and the air. The working system includes a first compressor, the output end of which is connected to the input end of an oil separator, the output end of which is connected to the input end of the first compressor, the output end of which is connected to the first end of a four-way valve, the second end of which is connected to an outdoor unit heat exchanger, the outdoor unit heat exchanger being connected to an outdoor unit electronic expansion valve, the outdoor unit electronic expansion valve being connected to an indoor unit electronic expansion valve, the indoor unit electronic expansion valve being connected to an indoor unit heat exchanger, the indoor unit heat exchanger being connected to the third end of the four-way valve, the fourth end of which is connected to the input end of a gas-liquid separator, the output end of which is connected to the input end of the first compressor, a first fan on the outdoor unit heat exchanger, and a second fan on the indoor unit heat exchanger. The engine system includes a water pump and an engine for supplying power to the first compressor and the second compressor. The output end of the water pump is connected to the input end of the internal pipe of the engine. The output end of the internal pipe of the engine is connected to the inlet of a three-way valve. The first outlet of the three-way valve is connected to the heat recovery unit. The heat recovery unit is connected to the input end of the water pump. The second outlet of the three-way valve is connected to the radiator. The radiator is connected to the input end of the water pump. Both the first compressor and the second compressor are equipped with clutches. The indoor unit heat exchanger and the indoor unit condenser are arranged side by side and closely attached. The outdoor unit heat exchanger and the radiator are arranged side by side and closely attached.

2. The gas-fired heat pump multi-split system according to claim 1, characterized in that, Both the first compressor and the second compressor are connected to the engine via belt drives.

3. A gas-fired heat pump multi-split system according to claim 1, characterized in that, Both ends of the indoor unit heat exchanger and the indoor unit condenser are equipped with valves.

4. A gas-fired heat pump multi-split system according to claim 1, characterized in that, The opening range of the three-way valve is [0, 100].

5. A control method for a gas-fired heat pump multi-split system, characterized in that, The gas-fired heat pump multi-split system according to any one of claims 1-4 comprises: Confirm the operating status of the second compressor based on the current system operating mode; Obtain the outlet air temperature of the indoor unit heat exchanger, compare the outlet air temperature with the preset value, and adjust the waste heat recovery status of the heat recovery unit according to the comparison result and the system's working mode. The operating modes include cooling mode, dehumidification mode, and heating mode.

6. The control method for a gas-fired heat pump multi-split system according to claim 5, characterized in that, Based on the current system operating mode, the operating status of the second compressor is confirmed as follows: If the operating mode is cooling mode, the second compressor is in the off state; If the operating mode is dehumidification mode, the second compressor is on. If the operating mode is heating mode, the second compressor is in the on state.

7. The control method for a gas-fired heat pump multi-split system according to claim 6, characterized in that, Obtain the outlet air temperature of the indoor unit heat exchanger, compare the outlet air temperature with a preset value, and adjust the waste heat recovery status of the heat recovery unit based on the comparison result and the system's operating mode, including: In cooling mode: With the second compressor off, the waste heat recovery of the heat recovery unit stops, and the work is complete. In dehumidification mode: The second compressor is on. Among them, if The waste heat recovery effect of the heat recovery unit will decrease; like This increases the waste heat recovery efficiency of the heat recovery unit; like The waste heat recovery effect of the heat recovery unit remains unchanged; In heating mode: The second compressor is on. Among them, if The waste heat recovery effect of the heat recovery unit will decrease; like This increases the waste heat recovery efficiency of the heat recovery unit; like The waste heat recovery effect of the heat recovery unit remains unchanged; In the formula, This refers to the outlet air temperature of the indoor unit's heat exchanger. The preset temperature value.

8. An air conditioner, characterized in that, The air conditioner is equipped with a gas heat pump multi-split system as described in any one of claims 1-4.

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