Kitchen heat pump air conditioning system and control method thereof

Abstract

The invention discloses a kitchen heat pump air conditioning system and a control method thereof, and relates to the technical field of heat pump air conditioners. The air conditioner refrigerant loop comprises a compressor, a four-way reversing valve, an electromagnetic valve A, a plate heat exchanger, a one-way valve A, an electronic expansion valve, an electromagnetic valve B, an evaporation air supply unit and a one-way valve B which are sequentially connected in series, and the one-way valve B communicates with the four-way reversing valve; the evaporation air supply unit is installed outdoors, the hot water loop comprises a hot water storage tank, a water pump and a plate heat exchanger which are sequentially connected, and water flow returns to the hot water storage tank after being subjected to heat exchange through the plate heat exchanger in the air conditioner refrigerant loop. The evaporation air supply unit is installed outdoors, fresh air supply is achieved, heat exchange is conducted through hot water loop water flow and the plate heat exchanger, an air conditioner system and hot water supply are combined, and the problems that in the prior art, energy consumption is high, oil smoke adheres, the using effect of an air conditioner is reduced, and air in a kitchen is turbid and prone to hurting a human body are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of heat pump air conditioners, and in particular relates to a kitchen heat pump air conditioner system and a control method thereof. Background Art

[0002] In the catering industry, the kitchen is one of the most important links in the kitchen. In hot seasons or high temperature environments, good temperature and humidity control can not only improve the stuffy environment of the kitchen, protect the health of chefs and kitchen staff, but also improve the comfort of chefs' cooking and kitchen staff's work.

[0003] In order to improve the working environment in the kitchen, many kitchens have installed air conditioners. The current solution is generally to install household or commercial air conditioning units, that is, to adopt a split air conditioning solution: the outdoor unit is installed outside the kitchen, and the wall-mounted or embedded air conditioning indoor unit is installed inside the kitchen to adjust the temperature of the entire kitchen environment. The existing kitchen hot water is usually provided by gas water heaters or air energy heat pump units, but the air conditioning system and hot water supply are independent of each other, and the overall energy consumption is high.

[0004] At the same time, when using household or commercial air conditioning units to improve the working comfort inside the kitchen, the indoor unit forces the internal air to circulate through the heat exchanger of the indoor unit through the suction effect of the indoor unit fan, and cools or heats the circulating air through the heat exchanger. Since the kitchen will produce a lot of oil smoke during the cooking process, although part of the oil smoke is sucked out by the range hood, some oil smoke will still remain mixed in the air in the kitchen. After this part of the oil smoke flows through the heat exchanger with the circulating air, the oil smoke will adhere to the filter and the surface of the heat exchanger, reducing the use effect of the air conditioner. In severe cases, the filter will be blocked, causing the air conditioning effect to be lost. At the same time, the oil smoke mixed in the air, without sufficient fresh air, will increase the turbidity of the air inside the kitchen, which is easy to cause harm to the workers inside the kitchen. Summary of the invention

[0005] The purpose of the present invention is to provide a kitchen heat pump air conditioning system, which realizes fresh air supply by installing an evaporative air supply unit outdoors, and combines the air conditioning system with the hot water supply through the heat exchange between the water flow in the hot water circuit and the plate heat exchanger in the air conditioning refrigerant circuit, thereby solving the problems of high overall energy consumption and oil fume adhesion that reduces the use effect of the air conditioner, as well as turbid air in the kitchen that is easy to cause harm to the human body.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention is a kitchen heat pump air conditioning system, comprising an air conditioning refrigerant circuit, wherein the air conditioning refrigerant circuit comprises a compressor, a four-way reversing valve, a solenoid valve A, a plate heat exchanger, a check valve A, an electronic expansion valve, a solenoid valve B, an evaporative air supply unit and a check valve B which are sequentially connected in series, and the check valve B is connected to the four-way reversing valve; wherein the evaporative air supply unit is installed outdoors and supplies air to the room through a ventilation duct; and a hot water circuit, wherein the hot water circuit comprises a hot water storage tank, a water pump and a plate heat exchanger which are sequentially connected, and is used to allow water to return to the hot water storage tank after heat exchange through the plate heat exchanger in the air conditioning refrigerant circuit.

[0008] As a preferred technical solution of the present invention, it also includes an air-conditioning condensing circuit, which includes a solenoid valve C and a condensing heat exchange unit connected in series. The air-conditioning condensing circuit is connected to the air-conditioning refrigerant circuit and is connected in parallel with the solenoid valve A, the plate heat exchanger and the one-way valve A.

[0009] As a preferred technical solution of the present invention, it also includes an air-conditioning hot air circuit, which includes a solenoid valve D connected between the four-way reversing valve and the plate heat exchanger. The refrigerant passes through the four-way reversing valve, the solenoid valve D, the plate heat exchanger, the evaporative air supply unit, the solenoid valve B, the electronic expansion valve, the condensing heat exchange unit and the solenoid valve C in sequence, and then flows back into the compressor through the four-way reversing valve.

[0010] As a preferred technical solution of the present invention, the fresh air and hot water circuit is also included, and the fresh air and hot water circuit includes a solenoid valve E, a condensing heat exchange unit and a one-way valve C connected in series; wherein, one end of the solenoid valve E is connected between the electronic expansion valve and the solenoid valve B in the air-conditioning refrigerant circuit, and one end of the one-way valve C is connected to the four-way reversing valve. The refrigerant passes through the reversing valve, solenoid valve A, plate heat exchanger, one-way valve A, electronic expansion valve, solenoid valve E, condensing heat exchange unit and one-way valve C in sequence, and then flows back into the compressor through the four-way reversing valve.

[0011] As a preferred technical solution of the present invention, the condensing heat exchange unit includes a first condensing heat exchanger and a second condensing heat exchanger; wherein the first condensing heat exchanger is connected to the fresh air and hot water circuit, and the second condensing heat exchanger is connected to the air conditioning condensing circuit.

[0012] A control method for a kitchen heat pump air conditioning system includes a cold air-hot water mode, in which a refrigerant forms a cycle through an air conditioning refrigerant circuit, an evaporative air supply unit delivers cold air to a room, and solenoid valves C, D and E are in a closed state; wherein water in the hot water circuit returns to a hot water storage tank after heat exchange through a plate heat exchanger, thereby heating the water in the hot water storage tank.

[0013] As a preferred technical solution of the present invention, when the hot water temperature in the hot water storage tank reaches a set value, the solenoid valve A is closed, and the solenoid valve C and the fan in the condensing heat exchange unit are turned on to cool the refrigerant.

[0014] As a preferred technical solution of the present invention, it includes a hot air-hot water mode, in which the refrigerant passes through a four-way reversing valve, a solenoid valve D, a plate heat exchanger, an evaporative air supply unit, a solenoid valve B, an electronic expansion valve, a second condensing heat exchanger, and a solenoid valve C, and then flows back to the compressor through the four-way reversing valve, and the solenoid valve A and the solenoid valve E are in a closed state; wherein the water flow in the hot water circuit returns to the hot water storage tank after heat exchange through the plate heat exchanger, thereby heating the water in the hot water storage tank.

[0015] As a preferred technical solution of the present invention, it includes a fresh air-hot water mode, in which the refrigerant passes through a four-way reversing valve, a solenoid valve A, a plate heat exchanger, an electronic expansion valve, a solenoid valve E, a first condensing heat exchanger and a one-way valve C, and then flows back to the compressor through the four-way reversing valve, and the solenoid valve C, the solenoid valve B and the solenoid valve D are in a closed state; wherein the water flow in the hot water circuit returns to the hot water storage tank after heat exchange through the plate heat exchanger, so as to heat the water in the hot water storage tank.

[0016] As a preferred technical solution of the present invention, when the hot water temperature in the hot water storage tank reaches a set value, the solenoid valve A is closed, and the solenoid valve C and the fan in the condensing heat exchange unit are turned on to cool the refrigerant.

[0017] The present invention has the following beneficial effects:

[0018] The present invention installs the evaporative air supply unit outdoors and supplies air to the kitchen through the ventilation duct, thereby avoiding the circulation of internal mixed oil smoke and air, which causes the oil smoke to adhere, and greatly improves the use effect and service life of the air conditioner.

[0019] At the same time, the refrigerant in the air-conditioning refrigerant circuit and the water in the hot water circuit are exchanged through the plate heat exchanger, which realizes the effective combination of the air-conditioning system and the hot water supply, reduces the situation of installing a separate gas water heater or air energy heat pump unit, and effectively reduces the overall energy consumption and use cost.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a kitchen heat pump air conditioning system of the present invention.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1- compressor, 2- four-way reversing valve, 3- solenoid valve A, 4- solenoid valve C, 5- one-way valve C, 6- condensing heat exchange unit, 7- hot water storage tank, 8- condensing fan, 9- first condensing heat exchanger, 10- second condensing heat exchanger, 11- plate heat exchanger, 12- water pump, 13- one-way valve A, 14- electronic expansion valve, 15- solenoid valve E, 16- solenoid valve B, 17- evaporation air supply unit, 18- fan, 19- evaporation heat exchanger, 20- one-way valve B, 21- solenoid valve D. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] Embodiment 1

[0028] See also Figure 1As shown, the present invention is a kitchen heat pump air conditioning system, including an air conditioning refrigerant circuit and a hot water circuit. The air conditioning refrigerant circuit includes a compressor 1, a four-way reversing valve 2, a solenoid valve A3, a plate heat exchanger 11, a check valve A13, an electronic expansion valve 14, a solenoid valve B16, an evaporative air supply unit 17 and a check valve B20 connected in series in sequence. The check valve B20 is connected to the four-way reversing valve 2, and the refrigerant flows back to the compressor 1 through the four-way reversing valve 2 to form a circulation loop. Among them, the evaporative air supply unit 17 includes a fan 18 and an evaporative heat exchanger 19. The evaporative air supply unit 17 is installed outdoors and supplies air to the room through a ventilation duct. Installing it outdoors avoids the circulation of internal mixed oil fume air, which causes the occurrence of oil fume adhesion, and greatly improves the use effect and service life of the air conditioner.

[0029] The hot water circuit includes a hot water storage tank 7, a water pump 12 and a plate heat exchanger 11 which are connected in sequence, and is used to allow the water to return to the hot water storage tank 7 after heat exchange through the plate heat exchanger 11 in the air-conditioning refrigerant circuit. The hot water storage tank 7 has a tap water inlet, a hot water supply outlet and a sewage outlet reserved for the outside.

[0030] At the same time, it also includes an air conditioning condensation circuit, an air conditioning hot air circuit and a fresh air hot water circuit. Specifically, the air conditioning condensation circuit includes a solenoid valve C4 and a condensation heat exchange unit 6 connected in series, the air conditioning condensation circuit is connected to the air conditioning refrigerant circuit, one end of the solenoid valve C4 is connected to the port connected to the four-way reversing valve 2 and the solenoid valve A3, and one end of the condensation heat exchange unit 6 is connected to the port connected to the electronic expansion valve 14 and the solenoid valve A3, thereby forming a parallel connection with the solenoid valve A3, the plate heat exchanger 11 and the one-way valve A13.

[0031] The air conditioning hot air circuit includes a solenoid valve D21 connected between the four-way reversing valve 2 and the plate heat exchanger 11. The refrigerant passes through the four-way reversing valve 2, the solenoid valve D21, the plate heat exchanger 11, the evaporative air supply unit 17, the solenoid valve B16, the electronic expansion valve 14, the condensing heat exchange unit 6 and the solenoid valve C4 in sequence, and then flows back into the compressor 1 through the four-way reversing valve 2.

[0032] The fresh air and hot water circuit includes a solenoid valve E15, a condensing heat exchange unit 6 and a one-way valve C5 connected in series; wherein, one end of the solenoid valve E15 is connected between the electronic expansion valve 14 and the solenoid valve B16 in the air-conditioning refrigerant circuit, and one end of the one-way valve C5 is connected to the four-way reversing valve 2. The refrigerant passes through the reversing valve 2, the solenoid valve A3, the plate heat exchanger 11, the one-way valve A13, the electronic expansion valve 14, the solenoid valve E15, the condensing heat exchange unit 6 and the one-way valve C5 in sequence, and then flows back into the compressor 1 through the four-way reversing valve 2.

[0033] The condensing heat exchange unit 6 includes a first condensing heat exchanger 9, a second condensing heat exchanger 10, and a condensing fan 8, and the first condensing heat exchanger 9 is connected to the fresh air hot water circuit, and the second condensing heat exchanger 10 is connected to the air conditioning condensing circuit. At the same time, the hot water storage tank 7, the plate heat exchanger 11 and the water pump 12 are connected by stainless steel pipes or PPR pipes, and other parts are connected by copper pipe welding.

[0034] Embodiment 2

[0035] like Figure 1 As shown, a control method for a kitchen heat pump air conditioning system includes a cold air-hot water mode:

[0036] The refrigerant forms a cycle through the air-conditioning refrigerant circuit. Specifically, the high-temperature gaseous refrigerant from the compressor 1 enters the plate heat exchanger 11 through the four-way reversing valve 2 and the solenoid valve A3, and is condensed into liquid refrigerant (releasing heat) inside the plate heat exchanger 11. It is throttled by the electronic expansion valve 14, flows through the solenoid valve B16, and enters the evaporative heat exchanger 19 of the evaporative air supply unit 17 to evaporate into gaseous refrigerant (absorbing heat), and then returns to the compressor 1 through the one-way valve B20 and the four-way reversing valve 2.

[0037] The high-temperature air from the external environment flows through the surface of the evaporative heat exchanger 19 under the suction action of the fan 18, releases heat, and enters the air supply duct after being cooled, so that the evaporative air supply unit 17 delivers cold air to the kitchen room. In this process, the solenoid valve C4, the solenoid valve D21 and the solenoid valve E15 are in the closed state.

[0038] At the same time, the water in the hot water storage tank 7 is sucked by the water pump 12, flows through the plate heat exchanger 11, absorbs heat after heat exchange, increases its own temperature, and then returns to the hot water storage tank 7, thereby heating the water in the hot water storage tank 7.

[0039] When the temperature of the hot water in the hot water storage tank 7 reaches the set value, the solenoid valve A3 is closed, the solenoid valve C4 is opened, the high-temperature gaseous refrigerant enters the second condensing heat exchanger 10 of the condensing heat exchange unit 6, and the condensing fan 8 is turned on to cool the refrigerant. The high-temperature gaseous refrigerant condenses into liquid and then enters the electronic expansion valve 14, repeating the above cycle.

[0040] The fan 18 of the evaporative air supply unit 17 is adjusted according to the supply air temperature, and the supply air temperature is used as the control object. When the actual air outlet temperature is higher than the required temperature, the speed of the compressor 1 is increased, and the speed of the fan 18 is reduced. A large cooling capacity and low air supply method is used to increase the temperature rise of the circulating air flowing through the evaporative heat exchanger 19, so that the supply air temperature meets the requirements; when the actual air outlet temperature is lower than the required temperature, the speed of the compressor 1 is reduced, and the speed of the fan 18 is increased. A small cooling capacity and high air supply method is used to reduce the temperature rise of the circulating air flowing through the evaporative heat exchanger 19, so that the supply air temperature meets the requirements.

[0041] Hot air-hot water mode:

[0042] The high-temperature gaseous refrigerant from the compressor 1 passes through the four-way reversing valve 2, the solenoid valve D21, and the plate heat exchanger 11. Part of the refrigerant condenses inside to form a high-temperature gas-liquid two-phase state and then enters the evaporative heat exchanger 19 in the evaporative air supply unit 17 to continue condensing. After being throttled by the solenoid valve B16 and the electronic expansion valve 14, it enters the second condensing heat exchanger 10, passes through the solenoid valve C4 and the four-way reversing valve 2, and flows back to the compressor 1. The low-temperature air from the external environment flows through the surface of the evaporative heat exchanger 19 under the suction action of the fan 18 to absorb heat, and enters the air supply duct after being heated. In this process, the solenoid valve A3 and the solenoid valve E15 are in the closed state.

[0043] In the hot water circuit, the water in the hot water storage tank 7 is pumped by the water pump 12 and then returns to the hot water storage tank 7 after heat exchange through the plate heat exchanger 11, so as to heat the water in the hot water storage tank 7. At the same time, the flow rate entering the plate heat exchanger 11 can be adjusted by adjusting the speed of the water pump 12, so as to adjust the amount of condensation heat released in the plate heat exchanger 11, so as to ensure the hot air temperature out of the evaporative air supply unit 17.

[0044] Among them, the outlet air temperature is taken as the control object. When the actual outlet air temperature is lower than the required temperature, the speed of the compressor 1 increases, the speed of the fan 18 decreases, and the speed of the water pump 12 decreases (the water pump is turned off when it is just turned on). The temperature rise of the circulating air flowing through the evaporative heat exchanger 19 is increased by a large heat and low air supply method, so that the air supply temperature meets the requirements; when the actual outlet air temperature is higher than the required temperature, the speed of the compressor 1 remains unchanged, the speed of the fan 18 remains unchanged, and the water pump 12 is turned on. By controlling the speed of the water pump 12, the proportion of heat in the plate heat exchanger 11 is increased, and the proportion of heat in the evaporative heat exchanger 9 is reduced, so that the air supply temperature meets the requirements, and hot water is heated at the same time. When the water temperature meets the requirements, the water pump 12 is turned off and the compressor speed is reduced to reduce the capacity of the entire compressor vapor compression cycle system to meet the air supply temperature requirements.

[0045] Fresh air-hot water mode:

[0046] The high-temperature gaseous refrigerant from the compressor 1 enters the plate heat exchanger 11 through the four-way reversing valve 2 and the solenoid valve A3, and is condensed into liquid refrigerant (releasing heat) inside the plate heat exchanger 11, then throttled by the electronic expansion valve 14, flows through the solenoid valve E15, enters the first condensing heat exchanger 9 to evaporate into gaseous refrigerant (absorbing heat), and then flows back to the compressor 1 after passing through the one-way valve 5 and the four-way reversing valve 2.

[0047] The high-temperature air from the external environment flows through the evaporative heat exchanger 19 under the suction action of the fan 18 and enters the air supply duct, and during this process, the solenoid valve C4, the solenoid valve B16 and the solenoid valve D21 are in the closed state.

[0048] The water in the hot water circuit passes through the plate heat exchanger 11 under the suction action of the water pump 12 for heat exchange, and then returns to the hot water storage tank 7 to heat the water in the hot water storage tank 7. When the temperature of the hot water in the hot water storage tank 7 reaches the set value, the solenoid valve A3 is closed, and the solenoid valve C4 is opened, and the high-temperature gaseous refrigerant is condensed into liquid in the condensing heat exchanger 10 of the condensing heat exchange unit 6. After the refrigerant is cooled, it enters the electronic expansion valve 14 and repeats the above cycle.

[0049] In addition, when only fresh air is needed, the evaporator fan 18 is directly turned on to use its suction effect to send fresh air from the outside to the kitchen, and only the fresh air mode is realized. When hot water is needed, it is circulated according to the above-mentioned "fresh air-hot water mode".

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A kitchen heat pump air conditioning system, characterized in that: include: An air conditioning refrigerant circuit, the air conditioning refrigerant circuit comprising a compressor (1), a four-way reversing valve (2), a solenoid valve A (3), a plate heat exchanger (11), a check valve A (13), an electronic expansion valve (14), a solenoid valve B (16), an evaporative air supply unit (17) and a check valve B (20) which are sequentially connected in series, wherein the check valve B (20) is connected to the four-way reversing valve (2); wherein the evaporative air supply unit (17) is installed outdoors and supplies air to the room through a ventilation duct; A hot water circuit, the hot water circuit comprising a hot water storage tank (7), a water pump (12) and a plate heat exchanger (11) connected in sequence, for allowing water to return to the hot water storage tank (7) after heat exchange through the plate heat exchanger (11) in the air conditioning refrigerant circuit.

2. A kitchen heat pump air conditioning system according to claim 1, characterized in that: It also includes an air conditioning condensation circuit, which includes a solenoid valve C (4) and a condensation heat exchange unit (6) connected in series. The air conditioning condensation circuit is connected to the air conditioning refrigerant circuit and is connected in parallel with the solenoid valve A (3), the plate heat exchanger (11) and the one-way valve A (13).

3. A kitchen heat pump air conditioning system according to claim 2, characterized in that: The air conditioning hot air circuit also includes an air conditioning hot air circuit, wherein the air conditioning hot air circuit includes an electromagnetic valve D (21) connected between the four-way reversing valve (2) and the plate heat exchanger (11), and the refrigerant passes through the four-way reversing valve (2), the electromagnetic valve D (21), the plate heat exchanger (11), the evaporative air supply unit (17), the electromagnetic valve B (16), the electronic expansion valve (14), the condensing heat exchange unit (6) and the electromagnetic valve C (4) in sequence, and then flows back into the compressor (1) through the four-way reversing valve (2).

4. A kitchen heat pump air conditioning system according to claim 3, characterized in that: It also includes a fresh air and hot water circuit, which includes a solenoid valve E (15), a condensing heat exchange unit (6) and a one-way valve C (5) connected in series; One end of the solenoid valve E (15) is connected between the electronic expansion valve (14) and the solenoid valve B (16) in the air conditioner refrigerant circuit, and one end of the check valve C (5) is connected to the four-way reversing valve (2). The refrigerant passes through the reversing valve (2), the solenoid valve A (3), the plate heat exchanger (11), the check valve A (13), the electronic expansion valve (14), the solenoid valve E (15), the condensing heat exchange unit (6) and the check valve C (5) in sequence, and then flows back into the compressor (1) through the four-way reversing valve (2).

5. A kitchen heat pump air conditioning system according to claim 4, characterized in that: The condensing heat exchange unit (6) comprises a first condensing heat exchanger (9) and a second condensing heat exchanger (10); The first condensing heat exchanger (9) is connected to the fresh air and hot water circuit, and the second condensing heat exchanger (10) is connected to the air conditioning condensing circuit.

6. A control method for a kitchen heat pump air conditioning system according to claim 5, characterized in that: Including a cold air-hot water mode, the refrigerant forms a cycle through the air conditioning refrigerant circuit, the evaporative air supply unit (17) delivers cold air to the room, and the solenoid valve C (4), the solenoid valve D (21) and the solenoid valve E (15) are in a closed state; The water flow in the hot water circuit returns to the hot water storage tank (7) after heat exchange in the plate heat exchanger (11), thereby heating the water in the hot water storage tank (7).

7. A control method for a kitchen heat pump air conditioning system according to claim 6, characterized in that: When the temperature of the hot water in the hot water storage tank (7) reaches a set value, the solenoid valve A (3) is closed, and the solenoid valve C (4) and the fan in the condensing heat exchange unit (6) are turned on to cool the refrigerant.

8. The control method of a kitchen heat pump air conditioning system according to claim 5, characterized in that: The invention comprises a hot air-hot water mode, wherein the refrigerant passes through a four-way reversing valve (2), a solenoid valve D (21), a plate heat exchanger (11), an evaporative air supply unit (17), a solenoid valve B (16), an electronic expansion valve (14), a second condensing heat exchanger (10), a solenoid valve C (4), and then flows back to the compressor (1) through the four-way reversing valve (2), and the solenoid valve A (3) and the solenoid valve E (15) are in a closed state; The water flow in the hot water circuit returns to the hot water storage tank (7) after heat exchange in the plate heat exchanger (11), thereby heating the water in the hot water storage tank (7).

9. The control method of a kitchen heat pump air conditioning system according to claim 5, characterized in that: Including a fresh air-hot water mode, the refrigerant passes through the four-way reversing valve (2), the solenoid valve A (3), the plate heat exchanger (11), the electronic expansion valve (14), the solenoid valve E (15), the first condensing heat exchanger (9) and the one-way valve C (5), and then flows back to the compressor (1) through the four-way reversing valve (2), and the solenoid valve C (4), the solenoid valve B (16) and the solenoid valve D (21) are in a closed state; The water flow in the hot water circuit returns to the hot water storage tank (7) after heat exchange in the plate heat exchanger (11), thereby heating the water in the hot water storage tank (7).

10. A control method for a kitchen heat pump air conditioning system according to claim 9, characterized in that: When the temperature of the hot water in the hot water storage tank (7) reaches a set value, the solenoid valve A (3) is closed, and the solenoid valve C (4) and the fan in the condensing heat exchange unit (6) are turned on to cool the refrigerant.

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