A control method and device of an air conditioning system, the air conditioning system and a storage medium

Abstract

The application discloses a kind of control method, device, air conditioning system and storage medium of air conditioning system, the method includes: in the case where air conditioning system starts to run just after starting, control the opening of water flow regulating switch Degree is set initial opening, and control bypass switch is closed;After air conditioning system runs first set time, the temperature at the outlet of water side heat exchange pipeline of water-cooled plate heat exchanger is obtained, and is recorded as the current outlet water temperature of air conditioning system;According to the target exhaust temperature of compressor, the opening of throttling mechanism is linkage controlled;According to the current outlet water temperature of air conditioning system, the opening of water flow regulating switch is adjusted, and the opening and closing of bypass switch is controlled.The scheme, by using water-cooled plate heat exchanger as outdoor heat exchanger to save installation space, and using plate heat exchanger to recycle the heat of indoor heat exchanger, make the condensing water of air conditioning system and condensing load match, realize the goal of energy saving and water saving.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning system technology, specifically relating to a control method, device, air conditioning system and storage medium for an air conditioning system, and particularly to a water-saving control method, device, air conditioning system and storage medium for a kitchen air conditioning system. Background Technology

[0002] In the segmented market of air conditioning systems, kitchen air conditioning systems have always been an easily overlooked product. This is because kitchens have unique environmental characteristics: high cooling demands, limited space, and significant grease trapping by range hoods. Current solutions often require large installation spaces and have limited cooling capacity, failing to meet the needs of kitchens.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a control method, device, air conditioning system, and storage medium for an air conditioning system, in order to solve the problems of large installation space and limited cooling capacity of air conditioning systems in related solutions, which cannot meet the needs of kitchens. The invention achieves the effect of saving installation space by using a water-cooled plate heat exchanger as the outdoor heat exchanger and recovering and utilizing the heat of the indoor heat exchanger, so that the condensing water and condensing load of the kitchen air conditioning system are matched, thereby achieving the goal of energy and water conservation.

[0005] This invention provides a control method for an air conditioning system. The air conditioning system includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism. The first heat exchanger is a water-cooled plate heat exchanger, and the second heat exchanger is a plate heat exchanger. A bypass pipe is provided between the common end of the third heat exchanger and the plate heat exchanger, and between the common end of the plate heat exchanger and the compressor. The compressor's exhaust port, after passing through the refrigerant-side heat exchange pipe of the water-cooled plate heat exchanger, the first heat exchange pipe of the plate heat exchanger, the throttling mechanism, and the third heat exchanger, is divided into two paths: one path exits through the second heat exchange pipe of the plate heat exchanger, and the other path exits through the bypass pipe. The refrigerant exiting from the bypass pipe and the refrigerant exiting from the second heat exchange pipe of the plate heat exchanger are combined. The system returns to the compressor's suction port; a water flow regulating switch is installed on the outlet pipe of the water-side heat exchange pipeline of the water-cooled plate heat exchanger; a bypass switch is installed on the bypass pipeline; the control method of the air conditioning system includes: when the air conditioning system is started and just beginning to run, controlling the opening degree of the water flow regulating switch to a set initial opening degree and controlling the bypass switch to close; after the air conditioning system has been running for a first set time, acquiring the temperature at the outlet of the water-side heat exchange pipeline of the water-cooled plate heat exchanger, and recording it as the current outlet water temperature of the air conditioning system; performing linkage control on the opening degree of the throttling mechanism according to the target exhaust temperature of the compressor; adjusting the opening degree of the water flow regulating switch according to the current outlet water temperature of the air conditioning system, and controlling the opening and closing of the bypass switch.

[0006] In some embodiments, adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system includes: determining the sum of the set target outlet water temperature and the set hysteresis temperature, denoted as the set maximum outlet water temperature; and determining the difference between the set target outlet water temperature and the set hysteresis temperature, denoted as the set minimum outlet water temperature; determining whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; if the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then maintaining the opening degree of the outlet water flow regulating switch at the current opening degree and keeping the bypass switch closed; if the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then reducing the opening degree of the outlet water flow regulating switch at a rate of decreasing the first set opening degree every second set time interval, based on the current opening degree of the outlet water flow regulating switch, until the current opening degree of the outlet water flow regulating switch has been reduced to the set minimum. When the opening degree is reached, the flow rate control switch is stopped from decreasing and its opening degree is maintained at the current opening degree, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature. Simultaneously, the bypass switch is kept closed. If it is determined that the current outlet water temperature of the air conditioning system is greater than or equal to the set maximum outlet water temperature, the opening degree of the flow rate control switch is maintained or increased based on its current opening degree, until the current opening degree of the flow rate control switch has increased to the set maximum opening degree. Then, the flow rate control switch is stopped from increasing and its opening degree is maintained at the current opening degree, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature. Simultaneously, the bypass switch is opened.

[0007] In some embodiments, adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system further includes: continuing to determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; if it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then prohibiting the opening degree of the outlet water flow regulating switch from increasing; if it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then prohibiting the operation of the outlet water flow regulating switch and the bypass switch; if it is determined that the current outlet water temperature of the air conditioning system is greater than the set maximum outlet water temperature, then prohibiting the opening degree of the outlet water flow regulating switch from decreasing.

[0008] In some embodiments, adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system further includes: continuing to determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; if it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then the opening degree of the outlet water flow regulating switch is reduced by a first set opening degree at second set time intervals, based on the current opening degree of the outlet water flow regulating switch, until the current opening degree of the outlet water flow regulating switch has been reduced to the set minimum opening degree, at which point the reduction is stopped and the opening degree of the outlet water flow regulating switch is maintained at the current opening degree, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature, at which point the reduction is stopped and the opening degree of the outlet water flow regulating switch is maintained at the set minimum opening degree. The current opening degree of the water flow regulating switch; if it is determined that the current water outlet temperature of the air conditioning system is greater than the set minimum water outlet temperature and less than or equal to the set maximum water outlet temperature, then the opening degree of the water flow regulating switch is maintained at the current opening degree; if it is determined that the current water outlet temperature of the air conditioning system is greater than the set maximum water outlet temperature, then the opening degree of the water flow regulating switch is increased by a first set degree every third set time interval, based on the current opening degree of the water flow regulating switch, until the current opening degree of the water flow regulating switch has been increased to the set maximum opening degree, then the increase is stopped and the opening degree of the water flow regulating switch is maintained at the current opening degree, or until the current water outlet temperature of the air conditioning system is greater than the set minimum water outlet temperature and less than or equal to the set maximum water outlet temperature, then the increase is stopped and the opening degree of the water flow regulating switch is maintained at the current opening degree.

[0009] In some embodiments, adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system further includes: recording the current outlet water temperature of the air conditioning system every second set time interval and determining the temperature rise rate of the current outlet water temperature of the air conditioning system: determining whether the difference between the current outlet water temperature of the air conditioning system recorded in the (n+1)th time and the current outlet water temperature of the air conditioning system recorded in the (n+2)th time is equal to 0, and the difference between the current outlet water temperature of the air conditioning system recorded in the nth time and the current outlet water temperature of the air conditioning system recorded in the (n+1)th time is equal to 0; n represents the number of times the current outlet water temperature of the air conditioning system is recorded and is a positive integer; if satisfied, the opening degree of the outlet water flow regulating switch is maintained at the current opening degree of the outlet water flow regulating switch; if not satisfied, the current outlet water temperature of the air conditioning system recorded in the nth time and the temperature rise rate of the current outlet water temperature of the air conditioning system are adjusted according to the current outlet water temperature of the air conditioning system. The difference in the current outlet water temperature of the air conditioning system recorded in the (n+1)th time is recorded as the first difference value. The difference between the current outlet water temperature of the air conditioning system recorded in the (n+1)th time and the current outlet water temperature of the air conditioning system recorded in the (n+2)th time is recorded as the second difference value. The ratio of the first difference value to the second difference value is determined as the temperature rise rate of the current outlet water temperature of the air conditioning system. If the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than 1, the opening degree of the outlet water flow regulating switch is reduced based on the current opening degree of the outlet water flow regulating switch. If the temperature rise rate of the current outlet water temperature of the air conditioning system is equal to 1, the opening degree of the outlet water flow regulating switch is maintained at the current opening degree of the outlet water flow regulating switch. If the temperature rise rate of the current outlet water temperature of the air conditioning system is less than 1, the opening degree of the outlet water flow regulating switch is increased based on the current opening degree of the outlet water flow regulating switch.

[0010] In some embodiments, adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system further includes: cumulatively counting the number of times the temperature rise rate of the current outlet water temperature of the air conditioning system is determined, obtaining a count count; resetting the count count to zero when the air conditioning system is turned off; and / or, if the temperature rise rate of the current outlet water temperature of the air conditioning system is determined to be greater than or equal to 1, and the current outlet water temperature of the air conditioning system is determined to exceed the set maximum outlet water temperature and the duration exceeds a fourth set time, then the outlet water flow regulating switch is determined to be faulty or the air conditioning system is shut down, and an alert message is initiated.

[0011] In some embodiments, adjusting the opening degree of the outlet flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system further includes: if it is determined that the overall running time of the air conditioning system exceeds a fifth set time, the current outlet water temperature of the air conditioning system is less than or equal to the set target outlet water temperature, and the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than or equal to 1, then controlling the bypass switch to close.

[0012] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioning system, the air conditioning system comprising a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism; the first heat exchanger is a water-cooled plate heat exchanger, and the second heat exchanger is a plate heat exchanger; a bypass pipe is provided between the common end of the third heat exchanger and the plate heat exchanger, and between the common end of the plate heat exchanger and the compressor; the exhaust port of the compressor, after passing through the refrigerant-side heat exchange pipe of the water-cooled plate heat exchanger, the first heat exchange pipe of the plate heat exchanger, the throttling mechanism, and the third heat exchanger, is divided into two paths: one path is output through the second heat exchange pipe of the plate heat exchanger, and the other path is output through the bypass pipe; the refrigerant output from the bypass pipe and the refrigerant output from the second heat exchange pipe of the plate heat exchanger merge and return to the suction port of the compressor; A water flow regulating switch is installed on the outlet pipe of the water-side heat exchange pipeline of the water-cooled plate heat exchanger; a bypass switch is installed on the bypass pipeline; the control device of the air conditioning system includes: a control unit configured to control the opening degree of the water flow regulating switch to a set initial opening degree and control the bypass switch to close when the air conditioning system is started and just beginning to run; an acquisition unit configured to acquire the temperature at the outlet of the water-side heat exchange pipeline of the water-cooled plate heat exchanger after the air conditioning system has been running for a first set time, and record it as the current outlet water temperature of the air conditioning system; the control unit is also configured to perform linkage control on the opening degree of the throttling mechanism according to the target exhaust temperature of the compressor; the control unit is also configured to adjust the opening degree of the water flow regulating switch and control the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system.

[0013] In some embodiments, the control unit adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system, including: determining the sum of the set target outlet water temperature and the set hysteresis temperature, denoted as the set maximum outlet water temperature; and determining the difference between the set target outlet water temperature and the set hysteresis temperature, denoted as the set minimum outlet water temperature; determining whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; if the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then the opening degree of the outlet water flow regulating switch is maintained at the current opening degree of the outlet water flow regulating switch, and the bypass switch is kept closed; if the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then the opening degree of the outlet water flow regulating switch is reduced by a first set opening degree at second set time intervals, based on the current opening degree of the outlet water flow regulating switch, until the current opening degree of the outlet water flow regulating switch has been reduced to the set minimum outlet water temperature. When the minimum opening is set, the flow rate control switch stops decreasing and maintains its current opening, or continues to decrease until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; simultaneously, the bypass switch remains closed. If the current outlet water temperature of the air conditioning system is determined to be greater than or equal to the set maximum outlet water temperature, the flow rate control switch is maintained or increased based on its current opening, until the current opening has increased to the set maximum opening, at which point the increase stops and the opening remains at its current level, or continues until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; simultaneously, the bypass switch is opened.

[0014] In some embodiments, the control unit, based on the current outlet water temperature of the air conditioning system, adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch, further includes: continuing to determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; if it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then prohibiting the opening degree of the outlet water flow regulating switch from increasing; if it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then prohibiting the operation of the outlet water flow regulating switch and prohibiting the operation of the bypass switch; if it is determined that the current outlet water temperature of the air conditioning system is greater than the set maximum outlet water temperature, then prohibiting the opening degree of the outlet water flow regulating switch from decreasing.

[0015] In some embodiments, the control unit, based on the current outlet water temperature of the air conditioning system, adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch, further includes: continuing to determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; if it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then the opening degree of the outlet water flow regulating switch is reduced by a first set opening degree at second set time intervals, based on the current opening degree of the outlet water flow regulating switch, until the current opening degree of the outlet water flow regulating switch has been reduced to the set minimum opening degree, at which point the reduction stops and the opening degree of the outlet water flow regulating switch is maintained at the current opening degree, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature, at which point the reduction stops and the opening degree of the outlet water flow regulating switch is maintained. If the current outlet water temperature of the air conditioning system is determined to be greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature, then the opening of the outlet water flow regulating switch is maintained at the current opening. If the current outlet water temperature of the air conditioning system is determined to be greater than the set maximum outlet water temperature, then the opening of the outlet water flow regulating switch is increased by a first set opening at every third set time interval, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been increased to the set maximum opening, at which point the increase is stopped and the opening of the outlet water flow regulating switch is maintained at the current opening, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature, at which point the increase is stopped and the opening of the outlet water flow regulating switch is maintained at the current opening.

[0016] In some embodiments, the control unit, based on the current outlet water temperature of the air conditioning system, adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch, further includes: recording the current outlet water temperature of the air conditioning system every second set time interval, and determining the temperature rise rate of the current outlet water temperature of the air conditioning system; determining whether the difference between the current outlet water temperature of the air conditioning system recorded in the (n+1)th time and the current outlet water temperature of the air conditioning system recorded in the (n+2)th time is equal to 0, and the difference between the current outlet water temperature of the air conditioning system recorded in the nth time and the current outlet water temperature of the air conditioning system recorded in the (n+1)th time is equal to 0; n represents the number of times the current outlet water temperature of the air conditioning system is recorded, and is a positive integer; if satisfied, the opening degree of the outlet water flow regulating switch is maintained at the current opening degree of the outlet water flow regulating switch; if not satisfied, the temperature rise rate of the current outlet water temperature of the air conditioning system recorded in the nth time is adjusted. The difference between the water temperature and the current outlet water temperature of the air conditioning system recorded at the (n+1)th time is recorded as the first difference. The difference between the current outlet water temperature of the air conditioning system recorded at the (n+1)th time and the current outlet water temperature of the air conditioning system recorded at the (n+2)th time is recorded as the second difference. The ratio of the first difference to the second difference is determined as the temperature rise rate of the current outlet water temperature of the air conditioning system. If the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than 1, the opening of the outlet water flow regulating switch is reduced based on the current opening of the outlet water flow regulating switch. If the temperature rise rate of the current outlet water temperature of the air conditioning system is equal to 1, the opening of the outlet water flow regulating switch is maintained at the current opening of the outlet water flow regulating switch. If the temperature rise rate of the current outlet water temperature of the air conditioning system is less than 1, the opening of the outlet water flow regulating switch is increased based on the current opening of the outlet water flow regulating switch.

[0017] In some embodiments, the control unit adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system. The control unit further includes: cumulatively counting the number of times the temperature rise rate of the current outlet water temperature of the air conditioning system is determined, obtaining a count; resetting the count to zero when the air conditioning system is turned off; and / or, if the temperature rise rate of the current outlet water temperature of the air conditioning system is determined to be greater than or equal to 1, and the current outlet water temperature of the air conditioning system exceeds the set maximum outlet water temperature for a duration exceeding a fourth set time, then the control unit determines that the outlet water flow regulating switch is faulty or that the air conditioning system is shut down, and initiates a reminder message.

[0018] In some embodiments, the control unit adjusts the opening degree of the outlet flow regulating switch and controls the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system. It further includes: if it is determined that the whole unit running time of the air conditioning system exceeds a fifth set time, the current outlet water temperature of the air conditioning system is less than or equal to the set target outlet water temperature, and the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than or equal to 1, then the bypass switch is controlled to close.

[0019] In conjunction with the above-described device, the present invention further provides an air conditioning system, comprising: the control device for the air conditioning system described above.

[0020] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device on which the storage medium is located controls the execution of the control method of the air conditioning system described above.

[0021] Therefore, the solution of the present invention, targeting a kitchen air conditioning system, includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a throttling mechanism (such as an electronic expansion valve). A water-cooled plate heat exchanger is used as the outdoor heat exchanger (such as an outdoor unit condenser), and a plate heat exchanger is installed between the outdoor and indoor heat exchangers as a heat recovery device. The plate heat exchanger has a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline of the water-cooled plate heat exchanger is a refrigerant-side heat exchange pipeline, and the second heat exchange pipeline is a water-side heat exchange pipeline. The compressor's exhaust port, after passing through the refrigerant-side heat exchange pipeline of the water-cooled plate heat exchanger, the first heat exchange pipeline of the plate heat exchanger, the throttling mechanism, and the indoor heat exchanger, returns to the compressor's suction port after passing through the second heat exchange pipeline of the plate heat exchanger. A solenoid valve is installed on the pipeline where the water outlet of the water-side heat exchange pipeline of the water-cooled plate heat exchanger is located. A bypass branch is installed between the outlet pipe of the indoor heat exchanger and the outlet pipe of the second heat exchange pipe of the plate heat exchanger. An electromagnetic shut-off valve is installed on this bypass branch. When the kitchen air conditioning system is initially started, the opening of the electromagnetic valve is set to the initial opening, and the electromagnetic shut-off valve is closed. After the system has been running in this manner for a set period, the opening of the electromagnetic valve is adjusted based on the temperature and its rising / falling trend at the outlet of the water-side heat exchanger of the water-cooled plate heat exchanger, combined with the overall operating time of the system. This ensures that the condensing water and condensing load of the water-cooled plate heat exchanger are matched. Therefore, by using a water-cooled plate heat exchanger as the outdoor heat exchanger, installation space is saved, and the heat from the indoor heat exchanger is recovered and utilized. This matches the condensing water and condensing load of the kitchen air conditioning system, achieving the goal of energy and water conservation.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a flowchart illustrating an embodiment of the control method for an air conditioning system according to the present invention;

[0025] Figure 2 This is a schematic flowchart of an embodiment of the first process of adjusting the opening degree of the outlet flow rate regulating switch according to the current outlet water temperature and controlling the opening and closing of the bypass switch in the method of the present invention.

[0026] Figure 3 This is a schematic flowchart of an embodiment of the second process in the method of the present invention, which involves adjusting the opening degree of the outlet flow rate regulating switch according to the current outlet water temperature and controlling the opening and closing of the bypass switch.

[0027] Figure 4 This is a flowchart illustrating an embodiment of the third process in the method of the present invention, in which the opening degree of the outlet flow rate regulating switch is adjusted according to the current outlet water temperature and the opening and closing of the bypass switch is controlled.

[0028] Figure 5 This is a flowchart illustrating an embodiment of the fourth process in the method of the present invention, which involves adjusting the opening degree of the outlet flow rate regulating switch according to the current outlet water temperature and controlling the opening and closing of the bypass switch.

[0029] Figure 6 This is a schematic diagram of the structure of an embodiment of the control device for the air conditioning system of the present invention;

[0030] Figure 7 A schematic diagram of a dual-plate heat exchanger system circulation according to an embodiment of a kitchen air conditioning system;

[0031] Figure 8 A schematic diagram of a single-board switching system 1 circulation system according to an embodiment of a kitchen air conditioning system;

[0032] Figure 9 A schematic diagram of a single-board switching system 2 circulation system according to an embodiment of a kitchen air conditioning system;

[0033] Figure 10 A schematic diagram of the control logic of an embodiment of a water-saving control method for a kitchen air conditioning system.

[0034] Combined with appendix Figure 7 The reference numerals in the accompanying drawings of this invention are as follows:

[0035] 11-Compressor; 12-Water-cooled plate heat exchanger; 13-Solenoid valve; 14-Fan motor system; 15-Evaporator; 16-Electronic expansion valve; 17-Plate heat exchanger; 18-Solenoid shut-off valve.

[0036] Combined with appendix Figure 8 The reference numerals in the accompanying drawings of this invention are as follows:

[0037] 21-Compressor; 22-Four-way valve; 23-Evaporator; 24-Fan motor system; 25-Electronic expansion valve; 26-Water storage equipment; 27-Plate heat exchanger;

[0038] Combined with appendix Figure 9 The reference numerals in the accompanying drawings of this invention are as follows:

[0039] 36-Water storage equipment; 37-Plate heat exchanger.

[0040] 102 - Acquisition unit; 104 - Control unit. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0042] Considering that the air conditioning system in the relevant scheme has a large installation space and limited cooling capacity, it cannot meet the needs of the kitchen. For example: (1) The kitchen space is small, the installation position of the indoor unit is limited, and the air inlet and outlet of the air conditioning system need to be specially designed; while the indoor unit of the air conditioning system in the relevant scheme is large in size and needs to drain the condensate water, and there are many kitchen cabinets, etc., so it cannot be installed directly. (2) The air conditioning system in the relevant scheme does not take into account the prevention of oil stains, etc., and is prone to accumulating oil stains and clogging. (3) The air conditioning system required in the kitchen has a short usage time, the temperature and humidity in the kitchen are high, and there is a range hood for exhaust, and the air exchange rate in the room is large, which can easily take away a large amount of cold air, so the required cooling capacity is large.

[0043] It is evident that kitchen spaces are unique, requiring specialized designs for air conditioning systems tailored to the specific conditions of each kitchen. The primary challenge for newly designed air conditioning systems is installation difficulty. Most kitchens are small, and the building design does not typically include designated spaces for outdoor air conditioning units. Furthermore, kitchens require significant air exchange, necessitating a large cooling capacity from the air conditioning system and resulting in substantial energy consumption.

[0044] Therefore, the present invention provides a control method for an air conditioning system, specifically a water-saving control method for a kitchen air conditioning system. By using a water-cooled plate heat exchanger as the outdoor unit condenser of the air conditioning system, installation space can be saved. The kitchen tap water is used for the first condensation in the water-cooled plate heat exchanger, and then the refrigerant evaporated in the indoor unit evaporator is used for the second condensation. By reducing the refrigerant temperature before throttling through the two condensation processes, energy can be saved and water consumption can be reduced. Furthermore, by detecting the temperature of the air conditioning system and controlling the on / off of the secondary throttling bypass branch, the reliability of the air conditioning system operation can be improved.

[0045] According to embodiments of the present invention, a control method for an air conditioning system is provided, such as... Figure 1 The diagram shows a flow chart of an embodiment of the method of the present invention. The air conditioning system includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism; the first heat exchanger is a water-cooled plate heat exchanger, and the second heat exchanger is a plate heat exchanger; wherein, the compressor is as follows... Figure 7 The compressor 1 shown has a throttling mechanism as follows: Figure 7 The electronic expansion valve 6 shown, the first heat exchanger as... Figure 7 The outdoor heat exchanger shown is water-cooled plate heat exchanger 2, and the second heat exchanger is as follows: Figure 7 The plate heat exchanger 7 shown is located between the indoor and outdoor heat exchangers, and the third heat exchanger is as follows: Figure 7 The indoor heat exchanger 5 shown; a bypass pipe is provided between the common end of the third heat exchanger and the plate heat exchanger, and between the common end of the plate heat exchanger and the compressor; the exhaust port of the compressor, after passing through the refrigerant-side heat exchange pipe of the water-cooled plate heat exchanger, the first heat exchange pipe of the plate heat exchanger, the throttling mechanism, and the third heat exchanger, is divided into two paths: one path is output through the second heat exchange pipe of the plate heat exchanger, and the other path is output through the bypass pipe (i.e., through a bypass pipe connected in parallel with the second heat exchange pipe of the plate heat exchanger); the refrigerant output from the bypass pipe and the refrigerant output from the second heat exchange pipe of the plate heat exchanger merge and return to the suction port of the compressor; a water flow regulating switch is provided on the pipe where the outlet of the water-side heat exchange pipe of the water-cooled plate heat exchanger is located, such as... Figure 7 The solenoid valve 3 shown; a bypass switch is installed on the bypass pipeline, such as Figure 7 The electromagnetic shut-off valve 8 is shown.

[0046] Specifically, Figure 7 This is a schematic diagram of a dual-plate heat exchanger system circulation, representing an embodiment of a kitchen air conditioning system. Figure 7The kitchen air conditioning system shown includes: a compressor 11, a water-cooled plate heat exchanger 12, a solenoid valve 13, a fan motor system 14, an evaporator 15, an electronic expansion valve 16, a plate heat exchanger 17, and a solenoid shut-off valve 18. The fan motor system 14 is located at the evaporator 15. The exhaust port of the compressor 11, after passing through the refrigerant heat exchange pipeline of the water-cooled plate heat exchanger 12, the first heat exchange pipeline of the plate heat exchanger 17, the electronic expansion valve 16, and the evaporator 15, splits into two paths: one path connects to the suction port of the compressor 11 via the second heat exchange pipeline of the plate heat exchanger 17 to return to the suction port of the compressor 11; the other path connects to the suction port of the compressor 11 via a bypass pipeline connected in parallel with the second heat exchange pipeline of the plate heat exchanger 17. Municipal water supply pipes are discharged to a water storage device after passing through the water heat exchange pipeline of the water-cooled plate heat exchanger 12. A solenoid valve 13 is installed on the outlet pipe of the water heat exchange pipeline of the water-cooled plate heat exchanger 12. A solenoid shut-off valve 18 is installed on the bypass pipe. The water-cooled plate heat exchanger 12 serves as the condenser of the outdoor unit, and the plate heat exchanger 17 serves as the heat recovery device for the evaporator 15. A temperature sensor T_discharge is installed on the discharge port pipe of the compressor 11 to detect the discharge temperature of the compressor 11. A temperature sensor T2 is installed on the outlet pipe of the refrigerant heat exchange pipeline of the water-cooled plate heat exchanger 12 to detect the outlet refrigerant temperature of the water-cooled plate heat exchanger 12. A temperature sensor T3 is installed on the outlet pipe of the water heat exchange pipeline of the water-cooled plate heat exchanger 12 to detect the outlet water temperature of the water-cooled plate heat exchanger 12, which is the outlet water temperature of the outdoor unit condenser. A temperature sensor T7 is installed on the outlet pipe of the first heat exchange pipe of the plate heat exchanger 17 to detect the first refrigerant outlet temperature of the plate heat exchanger 17. A temperature sensor T5in is installed on the inlet pipe of the evaporator 15 to detect the inlet refrigerant temperature of the evaporator 15. A temperature sensor T5out is installed on the outlet pipe of the evaporator 15 to detect the outlet refrigerant temperature of the evaporator 15.

[0047] by Figure 7Taking the kitchen air conditioning system shown as an example, the system is first started and put into operation. At this time, the compressor 11 compresses the refrigerant and performs work. The high-temperature and high-pressure refrigerant gas flows through the system pipeline into the water-cooled plate heat exchanger 12. In the water-cooled plate heat exchanger 12, tap water is used for the first cooling. At this time, the water-cooled plate heat exchanger 12 acts as the condenser of the outdoor unit. In the water-cooled plate heat exchanger 12, the tap water is heated by the high-temperature refrigerant from room temperature water (temperature about 18℃~22℃) to hot water, and the target temperature of the hot water is 65℃. The temperature rise from room temperature water to hot water in the water-cooled plate heat exchanger 12 depends on the water flow rate and the size of the water-cooled plate heat exchanger 12. The maximum outlet water temperature of the water-cooled plate heat exchanger 12 can reach about 70℃. The high-temperature, high-pressure refrigerant discharged from the compressor 11 undergoes a first cooling process in the water-cooled plate heat exchanger 12, transforming into a high-pressure, medium-temperature gas-liquid mixture. It then undergoes a second heat exchange in the plate heat exchanger 17. After this second heat exchange, the refrigerant can be condensed into a subcooled liquid refrigerant. The subcooled refrigerant then passes through a throttling mechanism such as the electronic expansion valve 16 or a capillary tube, where it is throttled into a low-temperature, low-pressure liquid refrigerant. This throttled low-temperature, low-pressure liquid refrigerant flows into the evaporator 15, which is a finned-tube heat exchanger. The evaporator 15 uses a fan motor system 14 for convective heat exchange. The low-temperature, low-pressure liquid refrigerant evaporates and absorbs heat in the evaporator 15, transforming into a low-temperature, low-pressure gas or gas-liquid mixture, which then flows through the plate heat exchanger 17 for a second evaporation and heat absorption. At this point, the refrigerant before throttling can be condensed again. A bypass branch is connected in parallel with the evaporator outlet pipe section and plate heat exchanger 17, with a solenoid shut-off valve 18 connected in series in the middle of the bypass branch. The function of the solenoid shut-off valve 18 is to open and close, controlling the opening and closing of the bypass branch, thereby controlling the refrigerant flow through the plate heat exchanger 17, and indirectly controlling the subcooling of the refrigerant before throttling by the throttling mechanism, as well as the amount of tap water used for cooling. The low-temperature, low-pressure gaseous refrigerant after secondary heat exchange in the plate heat exchanger 17 is drawn into the suction chamber of the compressor 11, compressed, and then becomes a high-temperature, high-pressure refrigerant gas. This cycle repeats continuously. Figure 7As shown, the air conditioning system has temperature sensors at the exhaust port of compressor 11, the refrigerant pipe outlet of water-cooled plate heat exchanger 12, the refrigerant pipe outlet of plate heat exchanger 17 (i.e., the refrigerant pipe outlet flowing to electronic expansion valve 16 after passing through plate heat exchanger 17), the inlet of evaporator 15, and the outlet of evaporator 15, for temperature acquisition. The on / off state of electromagnetic shut-off valve 18 is controlled by temperature acquisition, thereby controlling the stable and efficient operation of the air conditioning system. In this invention, replacing the outdoor unit condenser with a water-cooled plate heat exchanger saves installation space. Tap water is used for cooling in the water-cooled plate heat exchanger, and the cooled water after heat exchange can be used for daily water consumption, thus saving water. After the first step of water-cooled heat exchange in the water-cooled plate heat exchanger, a second heat exchange occurs through the refrigerant at the indoor unit evaporator outlet and the refrigerant after heat exchange, reducing the amount of cooling water used in the first step while minimizing the refrigerant temperature before throttling, thus optimizing the cooling effect and achieving energy saving.

[0048] Figure 8 This is a schematic diagram of a single-board heat exchange system 1, representing an embodiment of a kitchen air conditioning system. (See diagram below.) Figure 8 The kitchen air conditioning system shown includes: a compressor 21, a four-way valve 22, an evaporator 23, a fan motor system 24, an electronic expansion valve 25, a water storage device 26, and a plate heat exchanger 27. The fan motor system 24 is located at the evaporator 23. The exhaust port of the compressor 21 is connected to the first port of the four-way valve 22. The second port of the four-way valve 22, after passing through the refrigerant heat exchanger piping of the evaporator 23, electronic expansion valve 25, and plate heat exchanger 27, returns to the fourth port of the four-way valve 22. The third port of the four-way valve 22 is connected to the suction port of the compressor 21. The municipal water supply pipe, after passing through the water heat exchanger piping of the plate heat exchanger 27, is connected to the water storage device 26 (such as a water storage tank). The water storage device 26 can output water to domestic water pipes (such as dishwasher water pipes, sink faucet pipes, balcony water pipes, etc.), and then connect to the wastewater sewer network.

[0049] Figure 9 This is a schematic diagram of a single-board heat exchange system 2, representing an embodiment of a kitchen air conditioning system. (See diagram below.) Figure 9 The kitchen air conditioning system shown includes a compressor, a four-way valve, an evaporator, a fan motor system, and an electronic expansion valve (see [reference]). Figure 8In addition to the example shown, it also includes a water storage device 36 and a plate heat exchanger 37. The municipal water inlet pipe, after passing through the water heat exchanger 37, splits into two paths: one path passes through pipes such as cold water faucets and connects to the cold water usage point, where a water storage device 36 is installed. The water storage device 36 can be a water tank, trough, or other water storage container, and its rear end connects to the wastewater drainage network; the other path passes through pipes such as gas water heaters and connects to hot water usage points such as bathing areas, and its rear end connects to the wastewater drainage network. Of course, in Figure 8 and Figure 9 In the example shown, it is also possible to set as follows: Figure 7 The solenoid valve 13 and solenoid shut-off valve 18 are shown.

[0050] In the solution of the present invention, such as Figure 1 As shown, the control method of the air conditioning system includes steps S110 to S140.

[0051] In step S110, when the air conditioning system has just started running after being turned on, the opening degree of the water flow regulating switch is controlled to the set initial opening degree, and the bypass switch is controlled to close.

[0052] In step S120, after the air conditioning system has been running for a first set time, the temperature at the outlet of the water-side heat exchange pipe of the water-cooled plate heat exchanger is obtained and recorded as the current outlet water temperature of the air conditioning system. For example, the outlet water temperature of the outdoor unit condenser is recorded as T. 3感温包 . Specifically, Figure 10 This is a schematic diagram of the control logic for an embodiment of a water-saving control method for a kitchen air conditioning system, specifically showing the control logic of solenoid valve 13 and solenoid shut-off valve 18 in the kitchen air conditioning system. For example... Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system includes: Step 1: After the kitchen air conditioning system is turned on, the opening degree of the solenoid valve 13 is controlled to be the initial opening degree, such as 50%, and the solenoid shut-off valve 18 of the bypass branch is controlled to close; after the kitchen air conditioning system has been running for a first set time, such as 3 minutes, Step 2 and Step 3 are executed.

[0053] In step S130, the opening degree of the throttling mechanism is controlled in conjunction with the target discharge temperature of the compressor. Specifically, as follows: Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system also includes: Step 2, limiting the compressor's exhaust temperature to a maximum of 100°C, and performing linkage control on the compressor's target exhaust temperature and the opening of the electronic expansion valve, which can be implemented using separate fuzzy control logic; and performing unit protection and various fault detection controls for the kitchen air conditioning system, which can be implemented using additional protection logic.

[0054] The target discharge control of the compressor and the adjustment of the electronic expansion valve opening are as follows: After initially setting the expansion valve opening, the compressor discharge stabilizes after a certain period of time. At this point, the compressor discharge temperature is compared with the target discharge temperature. If the discharge is considered stable within a certain hysteresis range, the electronic expansion valve opening does not need adjustment. If the compressor discharge is higher than the target discharge and exceeds the hysteresis temperature limit, the electronic expansion valve opening needs to be appropriately increased to reduce discharge. Conversely, if the compressor discharge temperature is lower than the target discharge and exceeds the hysteresis temperature limit, the electronic expansion valve opening needs to be appropriately decreased to increase discharge. The hysteresis temperature, adjustment rate, target discharge value, and initial value of the electronic expansion valve are all set in the program based on experimental testing.

[0055] In step S140, the opening degree of the outlet water flow regulating switch is adjusted according to the current outlet water temperature of the air conditioning system, and the opening and closing of the bypass switch is controlled. Specifically, as shown... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: Step 3, detecting the outlet water temperature of the outdoor unit condenser using a temperature sensor, such as temperature sensor T3, at the outlet of the outdoor unit condenser, and recording the detected outlet water temperature of the outdoor unit condenser as T. 3感温包 This controls the opening degree of the solenoid valve 13 and the opening and closing of the solenoid shut-off valve 18 accordingly.

[0056] The water-saving control scheme for a kitchen air conditioning system provided by this invention uses a water-cooled plate heat exchanger as the outdoor unit condenser of the air conditioning system. The kitchen tap water is used for the first condensation in the water-cooled plate heat exchanger, and then the refrigerant evaporated in the indoor unit evaporator is used for the second condensation. By reducing the temperature of the refrigerant before throttling through the two condensation processes, energy saving and water reduction are achieved. Furthermore, by detecting the temperature of the air conditioning system, the on / off state of the secondary throttling bypass branch is controlled, thereby adjusting the cooling effect of the refrigerant and improving the reliability of the air conditioning system.

[0057] In this invention, a compact heat exchanger (i.e., a water-cooled plate heat exchanger) is used to achieve small-space assembly. The first cooling process utilizes tap water, and the second cooling process utilizes evaporator exhaust gas (which can recover some of the evaporator's cooling capacity). An on / off solenoid valve (such as solenoid shut-off valve 18) is also installed next to the second cooling process to control the refrigerant flow rate (meeting the cooling load requirements while recovering some cooling capacity for pre-throttling cooling). In this invention, both the tap water flow rate and the refrigerant flow rate for primary and secondary cooling are adjustable and controllable, such as adjusting according to the actual cooling load and exhaust temperature of the air conditioning system. Furthermore, it can achieve logical control adjustment based on load changes, resulting in a compact structure, high heat exchange efficiency, and intelligent water and energy saving.

[0058] In some embodiments, step S140, adjusting the opening degree of the outlet flow rate regulating switch according to the current outlet water temperature of the air conditioning system and controlling the opening and closing of the bypass switch, includes: a first process of adjusting the opening degree of the outlet flow rate regulating switch according to the current outlet water temperature and controlling the opening and closing of the bypass switch.

[0059] The following is combined Figure 2 The flowchart shown is a schematic diagram of an embodiment of the first process of adjusting the opening degree of the outlet flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature in the method of the present invention. The specific process of the first process of adjusting the opening degree of the outlet flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature in step S140 is further explained, including steps S210 to S250.

[0060] Step S210: Determine the sum of the set target outlet water temperature and the set hysteresis temperature, and record it as the set maximum outlet water temperature; and determine the difference between the set target outlet water temperature and the set hysteresis temperature, and record it as the set minimum outlet water temperature. The set target outlet water temperature is, for example, 65℃, and the set hysteresis temperature is, for example, 2℃.

[0061] Step S220: Determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature.

[0062] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system further includes: in step 3, setting the target outlet water temperature of the outdoor unit condenser, such as 65℃, and setting the hysteresis temperature, such as 2℃. When the opening degree of the solenoid valve 13 is the set initial opening degree, such as 50%, the solenoid shut-off valve 18 is closed, and the entire kitchen air conditioning system has been running for a first set time, such as 3 minutes, the outlet water temperature of the outdoor unit condenser is detected by the temperature sensing element at the outlet of the outdoor unit condenser, such as temperature sensing element T3, and the detected outlet water temperature of the outdoor unit condenser is recorded as T. 3感温包 And determine whether the following condition is met: the detected outlet water temperature T of the outdoor unit condenser. 3感温包 If the temperature is between the difference between the target outlet water temperature and the hysteresis temperature (e.g., 65℃-2℃=63℃) and the sum of the target outlet water temperature and the hysteresis temperature (e.g., 65℃+2℃=67℃), and does not exceed the set maximum outlet water temperature (e.g., 70℃), the opening degree of the solenoid valve 13 and the opening and closing of the solenoid shut-off valve 18 are controlled according to the judgment result, and then step 4 is executed.

[0063] Step S230: If it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then the opening degree of the outlet water flow regulating switch is maintained at the current opening degree, and the bypass switch is kept closed. Specifically, as shown... Figure 10As shown, the control logic of the water-saving control method for the kitchen air conditioning system further includes: in step 3, when the opening degree of the solenoid valve 13 is the set initial opening degree, such as 50%, the solenoid shut-off valve 18 is closed, and the entire kitchen air conditioning system has been running for a first set time, such as 3 minutes, if the judgment result is that the outlet water temperature T of the outdoor unit condenser is... 3感温包 If the temperature is greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, then the opening of the solenoid valve 13 is controlled to maintain the initial opening, such as 50%, and the solenoid shut-off valve 18 is controlled to remain closed.

[0064] Step S240: If it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then the opening of the outlet water flow regulating switch is reduced by a first set opening at second set time intervals, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been reduced to the set minimum opening. At this point, the reduction stops, and the opening of the outlet water flow regulating switch is maintained at its current opening. Alternatively, the reduction stops, and the opening of the outlet water flow regulating switch is maintained, until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature but less than the set maximum outlet water temperature. Simultaneously, the bypass switch remains closed. Specifically, as shown... Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system further includes: in step 3, when the opening degree of the solenoid valve 13 is the set initial opening degree, such as 50%, the solenoid shut-off valve 18 is closed, and the entire kitchen air conditioning system has been running for a first set time, such as 3 minutes, if the judgment result is that the outlet water temperature T of the outdoor unit condenser is... 3感温包 If the difference between the target outlet water temperature and the hysteresis temperature is less than or equal to the target temperature, such as 65℃-2℃=63℃, then the opening of the solenoid valve 13 will be reduced from the initial set opening (e.g., 50%), decreasing by 10% every second set time interval (e.g., 60 seconds), until it reaches the minimum set opening (e.g., 20%), until the outlet water temperature of the outdoor unit condenser reaches T. 3感温包 The temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening of the solenoid valve 13 has been reduced to the set minimum opening, such as 20%, then the opening of the solenoid valve 13 is maintained at the set minimum opening, such as 20%.

[0065] Step S250: If it is determined that the current outlet water temperature of the air conditioning system is greater than or equal to the set maximum outlet water temperature, then the opening degree of the outlet water flow regulating switch is maintained or increased based on the current opening degree of the outlet water flow regulating switch, until the current opening degree of the outlet water flow regulating switch has been increased to the set maximum opening degree, at which point the increase in opening is stopped and the opening degree of the outlet water flow regulating switch is maintained at the current opening degree, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, at which point the increase in opening is stopped and the opening degree of the outlet water flow regulating switch is maintained at the current opening degree; simultaneously, the bypass switch is controlled to open. Specifically, as shown... Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system further includes: in step 3, when the opening degree of the solenoid valve 13 is the set initial opening degree, such as 50%, the solenoid shut-off valve 18 is closed, and the entire kitchen air conditioning system has been running for a first set time, such as 3 minutes, if the judgment result is that the outlet water temperature T of the outdoor unit condenser is... 3感温包 If the temperature is greater than or equal to the sum of the target outlet water temperature and the hysteresis temperature (e.g., 65℃ + 2℃ = 67℃) and does not exceed the set maximum outlet water temperature (e.g., 70℃), then the opening of the solenoid valve 13 is maintained at the set initial opening (e.g., 50%), or the opening of the solenoid valve 13 is increased based on the set initial opening (e.g., 50%), and increased to the set maximum opening (e.g., 100%), until the outlet water temperature T of the outdoor unit condenser reaches a certain level. 3感温包 The temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, and the solenoid shut-off valve 18 is opened simultaneously. If the opening degree of the solenoid valve 13 has increased to the set maximum opening degree, such as 100%, then the opening degree of the solenoid valve 13 is controlled to be maintained at the set maximum opening degree, such as 100%.

[0066] In some embodiments, step S140, which involves adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature of the air conditioning system and controlling the opening and closing of the bypass switch, further includes a second process of adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature and controlling the opening and closing of the bypass switch.

[0067] The following is combined Figure 3 The flowchart shown is a schematic diagram of an embodiment of the second process of adjusting the opening degree of the outlet flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature in the method of the present invention. The specific process of the second process of adjusting the opening degree of the outlet flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature in step S140 is further explained, including steps S310 to S340.

[0068] Step S310: Continue to determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature. Specifically, as shown in step S310... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system also includes: Step 4, after executing Step 3, further determining whether the following condition is met: the detected outlet water temperature T of the outdoor unit condenser. 3感温包 If the temperature is between the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, then the opening degree of the solenoid valve 13 and / or the action of the solenoid shut-off valve 18 are restricted based on the judgment result, and then step 5 is executed.

[0069] Step S320: If it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then the opening degree of the outlet water flow regulating switch is prohibited from being increased. Specifically, as follows... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: after executing step 3, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the temperature difference between the target outlet water temperature and the hysteresis temperature is less than or equal to the temperature difference between the outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, then the opening degree of solenoid valve 13 is not allowed to be large.

[0070] Step S330: If it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then the outlet water flow regulating switch is disabled, and the bypass switch is also disabled. Specifically, as shown... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: after executing step 3, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the temperature is greater than the difference between the target outlet water temperature and the hysteresis temperature (e.g., 65℃ - 2℃ = 63℃), and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature (e.g., 65℃ + 2℃ = 67℃), then the opening adjustment of solenoid valve 13 is not allowed, and the solenoid shut-off valve 18 is not allowed to operate. Within this range, the system is considered to be in a stable state, and neither the opening of solenoid valve 13 nor the solenoid shut-off valve 18 needs to be activated; maintaining this state is sufficient.

[0071] Step S340: If it is determined that the current outlet water temperature of the air conditioning system is greater than the set maximum outlet water temperature, then the opening degree of the outlet water flow regulating switch is prohibited from being reduced. Specifically, as shown in... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: after executing step 3, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the temperature exceeds the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃ + 2℃ = 67℃, then the opening of solenoid valve 13 is not allowed to be reduced.

[0072] In some embodiments, step S140, which involves adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature of the air conditioning system and controlling the opening and closing of the bypass switch, further includes a third process of adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature and controlling the opening and closing of the bypass switch.

[0073] The following is combined Figure 4 The flowchart shown is an embodiment of the third process of adjusting the opening degree of the outlet flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature in the method of the present invention. The specific process of the third process of adjusting the opening degree of the outlet flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature in step S140 is further explained, including steps S410 to S440.

[0074] Step S410: Continue to determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature. Specifically, as shown in step S410... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: Step 5, after executing Step 4, continuing to determine whether the following condition is met: the detected outlet water temperature T of the outdoor unit condenser. 3感温包 If the temperature is between the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, the opening of the solenoid valve 13 is further adjusted according to the judgment result, and then step 6 is executed.

[0075] Step S420: If it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then the opening of the outlet water flow regulating switch is reduced by a first set opening at second set time intervals, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been reduced to the set minimum opening. At this point, the reduction stops, and the opening of the outlet water flow regulating switch is maintained at its current opening. Alternatively, the reduction stops, and the opening of the outlet water flow regulating switch is maintained, until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature but less than or equal to the set maximum outlet water temperature. Specifically, as shown... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: in step 5, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包If the difference between the target outlet water temperature and the hysteresis temperature is less than or equal to the target temperature, such as 65℃ - 2℃ = 63℃, then the opening of the solenoid valve 13 will be reduced from its current opening by a 10% reduction at second set time intervals, such as 60 seconds, until it reaches a minimum set opening of 20%, until the outlet water temperature T of the outdoor unit condenser reaches a minimum set opening. 3感温包 The opening temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening degree of the solenoid valve 13 has been reduced to the set minimum opening degree, such as 20%, then the opening degree of the solenoid valve 13 is maintained at the set minimum opening degree, such as 20%.

[0076] Step S430: If it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature, then the opening degree of the outlet water flow regulating switch is maintained at the current opening degree of the outlet water flow regulating switch. Specifically, as shown... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: in step 5, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the opening temperature is greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, then the opening degree of the control solenoid valve 13 will be maintained at the current opening degree.

[0077] Step S440: If it is determined that the current outlet water temperature of the air conditioning system is greater than the set maximum outlet water temperature, then the opening of the outlet water flow regulating switch is increased by a first set opening at every third set time interval, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been increased to the set maximum opening, then the increase is stopped and the opening of the outlet water flow regulating switch is maintained at the current opening, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature, then the increase is stopped and the opening of the outlet water flow regulating switch is maintained at the current opening.

[0078] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: in step 5, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包If the temperature exceeds the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃ + 2℃ = 67℃, then the opening of solenoid valve 13 will increase from its current opening by a first set opening degree, such as 10%, every third set time interval, such as 10 seconds. This will continue until the opening of solenoid valve 13 reaches the set maximum opening degree, such as 100%, until the outlet water temperature T of the outdoor unit condenser reaches its maximum. 3感温包 The opening temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening degree of the solenoid valve 13 has increased to the set maximum opening degree, such as 100%, then the opening degree of the solenoid valve 13 is maintained at the set maximum opening degree, such as 100%.

[0079] In some embodiments, step S140, which involves adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature of the air conditioning system and controlling the opening and closing of the bypass switch, further includes a fourth process of adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature and controlling the opening and closing of the bypass switch.

[0080] The following is combined Figure 5 The flowchart shown is a schematic diagram of an embodiment of the fourth process of adjusting the opening degree of the outlet flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature in the method of the present invention. The specific process of the fourth process of adjusting the opening degree of the outlet flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature in step S140 is further explained, including steps S510 to S570.

[0081] Step S510: Record the current outlet water temperature of the air conditioning system every second set time interval, and determine the temperature rise rate of the current outlet water temperature of the air conditioning system: specifically including steps S520 to S540.

[0082] Step S520: Determine whether the following conditions are met: the difference between the current outlet water temperature of the air conditioning system recorded in the (n+1)th time and the current outlet water temperature of the air conditioning system recorded in the (n+2)th time is equal to 0, and the difference between the current outlet water temperature of the air conditioning system recorded in the nth time and the current outlet water temperature of the air conditioning system recorded in the (n+1)th time is equal to 0; n represents the number of times the current outlet water temperature of the air conditioning system is recorded and is a positive integer.

[0083] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system also includes: Step 6, detecting and recording the outlet water temperature T of the outdoor unit condenser every second set time, such as 60 seconds. 3感温包 The value of T is used to determine the outlet water temperature T of the outdoor unit condenser. 3感温包 The temperature rise rate is determined, and the opening degree of solenoid valve 13 is controlled according to the judgment result. Then, steps 7, 8 and 9 are executed.

[0084] In step 6, first determine whether the following condition is met: T 3感温包n+1 -T 3感温包n+2 ≠0, T 3感温包n -T 3感温包n+1 If the result is not 0, then proceed to step 61 or step 62 based on the judgment result, followed by steps 7, 8, and 9. Where T... 3感温包n The nth time the outlet water temperature T of the outdoor unit condenser was detected and recorded. 3感温包 The value of T 3感温包n+1 The (n+1)th time the outlet water temperature T of the outdoor unit condenser was detected and recorded. 3感温包 The value of T 3感温包n+2 The (n+2)th time the water temperature T of the outdoor unit condenser was detected and recorded. 3感温包 The value of n, where n is a positive integer.

[0085] Step S530: If the condition is met, then the opening degree of the outlet flow rate regulating switch is maintained at its current opening degree. Specifically, as shown... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: Step 6 includes: Step 61, if T is satisfied... 3感温包n+1 -T 3感温包n+2 =0, and T 3感温包n -T 3感温包n+1 =0, which means the outlet water temperature T of the outdoor unit condenser is 0. 3感温包 No change was observed; at this time, the outlet water temperature T of the outdoor unit condenser remained unchanged. 3感温包 During the stable phase, the opening of solenoid valve 13 is maintained.

[0086] In step S540, if the condition is not met, the difference between the current outlet water temperature of the air conditioning system recorded in the nth time and the current outlet water temperature of the air conditioning system recorded in the (n+1)th time is recorded as the first difference, and the difference between the current outlet water temperature of the air conditioning system recorded in the (n+1)th time and the current outlet water temperature of the air conditioning system recorded in the (n+2)th time is recorded as the second difference. The ratio of the first difference to the second difference is determined as the temperature rise rate of the current outlet water temperature of the air conditioning system.

[0087] Step S550: If the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than 1, then the opening degree of the outlet water flow regulating switch is reduced based on the current opening degree of the outlet water flow regulating switch.

[0088] Step S560: If the temperature rise rate of the current outlet water temperature of the air conditioning system is equal to 1, then the opening degree of the outlet water flow regulating switch is maintained at the current opening degree of the outlet water flow regulating switch.

[0089] Step S570: If the temperature rise rate of the current outlet water temperature of the air conditioning system is less than 1, then the opening degree of the outlet water flow regulating switch is increased based on the current opening degree of the outlet water flow regulating switch.

[0090] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: Step 6 includes: Step 62, if T is not satisfied... 3感温包n+1 -T 3感温包n+2 =0, and T 3感温包n -T 3感温包n+1 =0, then the outlet water temperature T of the outdoor unit condenser 3感温包 The rate of temperature rise Δ 温升速率 =(T 3感温包n -T 3感温包n+1 ) / (T 3感温包n+1 -T 3感温包n+2 Determine the outlet water temperature T of the outdoor unit condenser. 3感温包 Temperature rise and fall trend:

[0091] If the outlet water temperature of the outdoor unit condenser is T 3感温包 The rate of temperature rise Δ 温升速率 If the value is greater than 1, it indicates that the outlet water temperature T of the outdoor unit condenser is... 3感温包 The rate of temperature rise Δ 温升速率 Slow down the opening of solenoid valve 13. This reduction can be achieved by decreasing the opening of solenoid valve 13 from its current position at intervals of 10% (e.g., every 60 seconds, after a second set time interval), until the opening is reduced to a minimum set opening (e.g., 20%), until the outlet water temperature T of the outdoor unit condenser decreases. 3感温包 The opening temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening degree of the solenoid valve 13 has been reduced to the set minimum opening degree, such as 20%, then the opening degree of the solenoid valve 13 is maintained at the set minimum opening degree, such as 20%.

[0092] If the outlet water temperature of the outdoor unit condenser is T 3感温包 The rate of temperature rise Δ 温升速率 =1 indicates that the outlet water temperature T of the outdoor unit condenser is 1. 3感温包 The rate of temperature rise Δ 温升速率 Maintain the level, and keep the opening of the solenoid valve 13 level.

[0093] If the outlet water temperature of the outdoor unit condenser is T 3感温包 The rate of temperature rise Δ 温升速率 If <1, it indicates that the outlet water temperature T of the outdoor unit condenser is... 3感温包 The rate of temperature rise Δ 温升速率Accelerate the process by increasing the opening of solenoid valve 13. This increase can be achieved by: increasing the opening of solenoid valve 13 by a predetermined percentage (e.g., 10%) every third set time interval (e.g., 10 seconds), from its current opening, until the maximum opening (e.g., 100%) is reached, until the outlet water temperature T of the outdoor unit condenser increases. 3感温包 The opening temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening degree of the solenoid valve 13 has increased to the set maximum opening degree, such as 100%, then the opening degree of the solenoid valve 13 is maintained at the set maximum opening degree, such as 100%.

[0094] In some embodiments, step S140, which involves adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature of the air conditioning system and controlling the opening and closing of the bypass switch, further includes a fifth and / or a sixth process of adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature and controlling the opening and closing of the bypass switch.

[0095] Fifth process: Each time the temperature rise rate of the current outlet water temperature of the air conditioning system is determined, a count is performed, resulting in a count count; that is, the number of times the temperature rise rate of the current outlet water temperature of the air conditioning system is determined is accumulated, resulting in a count count; this count is reset to zero when the air conditioning system is turned off so that it can be counted again for the next determination, and then returns to the previous process so that after the next startup, the opening of the outlet water flow regulating switch is adjusted according to the current outlet water temperature of the air conditioning system, and the opening and closing of the bypass switch is controlled. Specifically, as follows... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system also includes: Step 7, assuming that the outlet water temperature T of the outdoor unit condenser is every second set time, such as 60 seconds. 3感温包 The value is detected and recorded for n times. Each time step 6 is executed, the count n increases by one, and then returns to 2. If the air conditioning system is turned off, the count n is reset to zero and the count restarts.

[0096] The sixth process: If it is determined that the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than or equal to 1, and it is determined that the current outlet water temperature of the air conditioning system exceeds the set maximum outlet water temperature and the duration exceeds the fourth set time, then it is determined that the outlet water flow regulating switch is faulty or the air conditioning system is shut down, and an alert message is initiated. Specifically, such as... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system also includes: Step 8, if the outlet water temperature T of the outdoor unit condenser is detected... 3感温包 The rate of temperature rise Δ 温升速率 Slow down or remain the same, the outlet water temperature T of the outdoor unit condenser3感温包 If the water temperature exceeds the set maximum outlet temperature (e.g., 70℃) and the duration exceeds the fourth set time (e.g., 120 seconds), it is determined that the outdoor unit's condenser is shut off or that solenoid valve 13 is malfunctioning. A shutdown command is issued to execute step 10, and a buzzer alarm is activated, prompting the user to verify whether the condensate water valve (i.e., solenoid valve 13) is malfunctioning or shut off. The faucet switch in this circuit, not limited to solenoid valve 13, should normally ensure that the municipal water pipe faucet entering the house remains open, similar to the washing machine's inlet hose.

[0097] In some embodiments, step S140, which involves adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature of the air conditioning system and controlling the opening and closing of the bypass switch, further includes a seventh process of adjusting the opening degree of the outlet flow regulating switch according to the current outlet water temperature and controlling the opening and closing of the bypass switch.

[0098] Seventh process: If it is determined that the total running time of the air conditioning system exceeds the fifth set time, the current outlet water temperature of the air conditioning system is less than or equal to the set target outlet water temperature, and the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than or equal to 1, then control the bypass switch to close, and then return to the previous state so that after the next startup, the opening degree of the outlet water flow regulating switch can be adjusted according to the current outlet water temperature of the air conditioning system, and the opening and closing of the bypass switch can be controlled.

[0099] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system also includes: Step 9, when the solenoid shut-off valve 18 of the bypass branch is already open, determining whether the following conditions are met: the continuous running time of the entire kitchen air conditioning system has exceeded the fifth set time, such as 10 minutes, and the outlet water temperature T of the outdoor unit condenser. 3感温包 Less than or equal to the target outlet water temperature, such as 65℃, and the outlet water temperature T of the outdoor unit condenser. 3感温包 The rate of temperature rise Δ 温升速率 If the value is ≥1, then the electromagnetic shut-off valve 18 is closed, and then the process returns to step 2.

[0100] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system also includes: Step 10, after controlling the kitchen air conditioning system to stop, returning to Step 1, so as to return to Step 1 the next time the kitchen air conditioning system is turned on.

[0101] Referring to steps 1 to 10, in the solution of the present invention, the temperature value T detected by the temperature sensing bag T3 is determined. 3感温包The system determines the outlet water temperature of the outdoor unit condenser. If, with the solenoid valve 13 at its initial opening (e.g., 50%), the outlet water temperature does not exceed 70℃ after a first set time (e.g., 180 seconds) and remains within the target temperature range (e.g., 63℃~67℃), then the opening of the solenoid valve 13 remains unchanged. If, with the solenoid valve 13 at its initial opening (e.g., 50%), the outlet water temperature falls below 63℃ after a first set time (e.g., 180 seconds), then the opening of the solenoid valve 13 is adjusted at a set reduction rate (e.g., 10% / 60 seconds) until the outlet water temperature reaches the target temperature range. If, with the solenoid valve 13 at its initial opening (e.g., 50%), the outlet water temperature of the outdoor unit condenser exceeds 67°C after a first set time (e.g., 180 seconds), the solenoid valve 13 will open to 100%, and simultaneously, the bypass branch containing the solenoid shut-off valve 18 will open. The opening of the solenoid valve 13 can be adjusted according to the outlet water temperature of the outdoor unit condenser and its temperature rise / fall trend. This allows for matching of condensate water usage with the condensate load, minimizing water consumption and achieving energy and water conservation goals.

[0102] In the present invention, the outdoor unit condenser (such as a water-cooled plate heat exchanger 12) is only water-cooled and has an intermediate heat recovery device (such as a plate heat exchanger 17). The main purpose is to save condensing water consumption, which is mainly achieved by absorbing the condenser's cooling capacity and the refrigerant's cooling capacity after evaporation and heat absorption. Specifically, by replacing the outdoor unit condenser with a water-cooled plate heat exchanger, the size of the outdoor unit can be miniaturized, improving installation flexibility. Through two heat exchange cycles using the water-cooled plate heat exchanger, the cooling demand is met while reducing the cooling water consumption of the outdoor unit condenser, saving condensing water consumption and achieving water conservation goals. The heat recovery device recovers the cooling capacity of the evaporator, improving the heat exchange efficiency of the air conditioning system and achieving energy saving and consumption reduction. Thus, the air conditioning system achieves its cooling effect, producing hot water while cooling, meeting the hot water needs during cooking and cleaning, and enabling the recovery and reuse of condensate from the outdoor unit. Through dual plate heat exchangers (i.e., two water-cooled plate heat exchangers), it can both produce hot water and recover and reuse the excess cooling energy after heat exchange from the evaporator, achieving energy saving while reducing condensate water consumption, thus saving water compared to using a single water-cooled heat exchanger.

[0103] In the present invention, according to the above embodiments, the form of heat exchanger, the form of throttling component, etc. can be adjusted accordingly. The embodiments mentioned above are only the most basic embodiments and should not be construed as limiting the present invention.

[0104] The technical solution of this embodiment addresses a kitchen air conditioning system. This system includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a throttling mechanism (such as an electronic expansion valve). A water-cooled plate heat exchanger is used as the outdoor heat exchanger (such as an outdoor unit condenser), and a plate heat exchanger is installed between the outdoor and indoor heat exchangers as a heat recovery device. The plate heat exchanger has a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline of the water-cooled plate heat exchanger is a refrigerant-side heat exchange pipeline, and the second heat exchange pipeline is a water-side heat exchange pipeline. The compressor's exhaust port passes through the refrigerant-side heat exchange pipeline of the water-cooled plate heat exchanger, the first heat exchange pipeline of the plate heat exchanger, the throttling mechanism, and the indoor heat exchanger, and then returns to the compressor's suction port through the second heat exchange pipeline of the plate heat exchanger. A solenoid valve is installed on the pipeline where the water outlet of the water-side heat exchange pipeline of the water-cooled plate heat exchanger is located. A bypass branch is installed between the outlet pipe of the indoor heat exchanger and the outlet pipe of the second heat exchange pipe of the plate heat exchanger. An electromagnetic shut-off valve is installed on this bypass branch. When the kitchen air conditioning system is initially started, the opening of the electromagnetic valve is set to the initial opening, and the electromagnetic shut-off valve is closed. After the system has been running in this manner for a set period, the opening of the electromagnetic valve is adjusted based on the temperature and its rising / falling trend at the outlet of the water-side heat exchanger of the water-cooled plate heat exchanger, combined with the overall operating time of the system. This ensures that the condensing water and condensing load of the water-cooled plate heat exchanger are matched. Therefore, by using a water-cooled plate heat exchanger as the outdoor heat exchanger, installation space is saved, and the heat from the indoor heat exchanger is recovered and utilized. This matches the condensing water and condensing load of the kitchen air conditioning system, achieving the goal of energy and water conservation.

[0105] According to an embodiment of the present invention, a control device for an air conditioning system corresponding to a control method for an air conditioning system is also provided. See also Figure 6 The diagram shows a structural schematic of an embodiment of the device of the present invention. The air conditioning system includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism; the first heat exchanger is a water-cooled plate heat exchanger, and the second heat exchanger is a plate heat exchanger; wherein, the compressor is as follows... Figure 7 The compressor 1 shown has a throttling mechanism as follows: Figure 7 The electronic expansion valve 6 shown, the first heat exchanger as... Figure 7 The outdoor heat exchanger shown is water-cooled plate heat exchanger 2, and the second heat exchanger is as follows: Figure 7 The plate heat exchanger 7 shown is located between the indoor and outdoor heat exchangers, and the third heat exchanger is as follows: Figure 7The indoor heat exchanger 5 shown; a bypass pipe is provided between the common end of the third heat exchanger and the plate heat exchanger, and between the common end of the plate heat exchanger and the compressor; the exhaust port of the compressor, after passing through the refrigerant-side heat exchange pipe of the water-cooled plate heat exchanger, the first heat exchange pipe of the plate heat exchanger, the throttling mechanism, and the third heat exchanger, is divided into two paths: one path is output through the second heat exchange pipe of the plate heat exchanger, and the other path is output through the bypass pipe (i.e., through a bypass pipe connected in parallel with the second heat exchange pipe of the plate heat exchanger); the refrigerant output from the bypass pipe and the refrigerant output from the second heat exchange pipe of the plate heat exchanger merge and return to the suction port of the compressor; a water flow regulating switch is provided on the pipe where the outlet of the water-side heat exchange pipe of the water-cooled plate heat exchanger is located, such as... Figure 7 The solenoid valve 3 shown; a bypass switch is installed on the bypass pipeline, such as Figure 7 The electromagnetic shut-off valve 8 is shown.

[0106] Specifically, Figure 7 This is a schematic diagram of a dual-plate heat exchanger system circulation, representing an embodiment of a kitchen air conditioning system. Figure 7The kitchen air conditioning system shown includes: a compressor 11, a water-cooled plate heat exchanger 12, a solenoid valve 13, a fan motor system 14, an evaporator 15, an electronic expansion valve 16, a plate heat exchanger 17, and a solenoid shut-off valve 18. The fan motor system 14 is located at the evaporator 15. The exhaust port of the compressor 11, after passing through the refrigerant heat exchange pipeline of the water-cooled plate heat exchanger 12, the first heat exchange pipeline of the plate heat exchanger 17, the electronic expansion valve 16, and the evaporator 15, splits into two paths: one path connects to the suction port of the compressor 11 via the second heat exchange pipeline of the plate heat exchanger 17 to return to the suction port of the compressor 11; the other path connects to the suction port of the compressor 11 via a bypass pipeline connected in parallel with the second heat exchange pipeline of the plate heat exchanger 17. Municipal water supply pipes are discharged to a water storage device after passing through the water heat exchange pipeline of the water-cooled plate heat exchanger 12. A solenoid valve 13 is installed on the outlet pipe of the water heat exchange pipeline of the water-cooled plate heat exchanger 12. A solenoid shut-off valve 18 is installed on the bypass pipe. The water-cooled plate heat exchanger 12 serves as the condenser of the outdoor unit, and the plate heat exchanger 17 serves as the heat recovery device for the evaporator 15. A temperature sensor T_discharge is installed on the discharge port pipe of the compressor 11 to detect the discharge temperature of the compressor 11. A temperature sensor T2 is installed on the outlet pipe of the refrigerant heat exchange pipeline of the water-cooled plate heat exchanger 12 to detect the outlet refrigerant temperature of the water-cooled plate heat exchanger 12. A temperature sensor T3 is installed on the outlet pipe of the water heat exchange pipeline of the water-cooled plate heat exchanger 12 to detect the outlet water temperature of the water-cooled plate heat exchanger 12, which is the outlet water temperature of the outdoor unit condenser. A temperature sensor T7 is installed on the outlet pipe of the first heat exchange pipe of the plate heat exchanger 17 to detect the first refrigerant outlet temperature of the plate heat exchanger 17. A temperature sensor T5in is installed on the inlet pipe of the evaporator 15 to detect the inlet refrigerant temperature of the evaporator 15. A temperature sensor T5out is installed on the outlet pipe of the evaporator 15 to detect the outlet refrigerant temperature of the evaporator 15.

[0107] by Figure 7Taking the kitchen air conditioning system shown as an example, the system is first started and put into operation. At this time, the compressor 11 compresses the refrigerant and performs work. The high-temperature and high-pressure refrigerant gas flows through the system pipeline into the water-cooled plate heat exchanger 12. In the water-cooled plate heat exchanger 12, tap water is used for the first cooling. At this time, the water-cooled plate heat exchanger 12 acts as the condenser of the outdoor unit. In the water-cooled plate heat exchanger 12, the tap water is heated by the high-temperature refrigerant from room temperature water (temperature about 18℃~22℃) to hot water, and the target temperature of the hot water is 65℃. The temperature rise from room temperature water to hot water in the water-cooled plate heat exchanger 12 depends on the water flow rate and the size of the water-cooled plate heat exchanger 12. The maximum outlet water temperature of the water-cooled plate heat exchanger 12 can reach about 70℃. The high-temperature, high-pressure refrigerant discharged from the compressor 11 undergoes a first cooling process in the water-cooled plate heat exchanger 12, transforming into a high-pressure, medium-temperature gas-liquid mixture. It then undergoes a second heat exchange in the plate heat exchanger 17. After this second heat exchange, the refrigerant can be condensed into a subcooled liquid refrigerant. The subcooled refrigerant then passes through a throttling mechanism such as the electronic expansion valve 16 or a capillary tube, where it is throttled into a low-temperature, low-pressure liquid refrigerant. This throttled low-temperature, low-pressure liquid refrigerant flows into the evaporator 15, which is a finned-tube heat exchanger. The evaporator 15 uses a fan motor system 14 for convective heat exchange. The low-temperature, low-pressure liquid refrigerant evaporates and absorbs heat in the evaporator 15, transforming into a low-temperature, low-pressure gas or gas-liquid mixture, which then flows through the plate heat exchanger 17 for a second evaporation and heat absorption. At this point, the refrigerant before throttling can be condensed again. A bypass branch is connected in parallel with the evaporator outlet pipe section and plate heat exchanger 17, with a solenoid shut-off valve 18 connected in series in the middle of the bypass branch. The function of the solenoid shut-off valve 18 is to open and close, controlling the opening and closing of the bypass branch, thereby controlling the refrigerant flow through the plate heat exchanger 17, and indirectly controlling the subcooling of the refrigerant before throttling by the throttling mechanism, as well as the amount of tap water used for cooling. The low-temperature, low-pressure gaseous refrigerant after secondary heat exchange in the plate heat exchanger 17 is drawn into the suction chamber of the compressor 11, compressed, and then becomes a high-temperature, high-pressure refrigerant gas. This cycle repeats continuously. Figure 7As shown, the air conditioning system has temperature sensors at the exhaust port of compressor 11, the refrigerant pipe outlet of water-cooled plate heat exchanger 12, the refrigerant pipe outlet of plate heat exchanger 17 (i.e., the refrigerant pipe outlet flowing to electronic expansion valve 16 after passing through plate heat exchanger 17), the inlet of evaporator 15, and the outlet of evaporator 15, for temperature acquisition. The on / off state of electromagnetic shut-off valve 18 is controlled by temperature acquisition, thereby controlling the stable and efficient operation of the air conditioning system. In this invention, replacing the outdoor unit condenser with a water-cooled plate heat exchanger saves installation space. Tap water is used for cooling in the water-cooled plate heat exchanger, and the cooled water after heat exchange can be used for daily water consumption, thus saving water. After the first step of water-cooled heat exchange in the water-cooled plate heat exchanger, a second heat exchange occurs through the refrigerant at the indoor unit evaporator outlet and the refrigerant after heat exchange, reducing the amount of cooling water used in the first step while minimizing the refrigerant temperature before throttling, thus optimizing the cooling effect and achieving energy saving.

[0108] Figure 8 This is a schematic diagram of a single-board heat exchange system 1, representing an embodiment of a kitchen air conditioning system. (See diagram below.) Figure 8 The kitchen air conditioning system shown includes: a compressor 21, a four-way valve 22, an evaporator 23, a fan motor system 24, an electronic expansion valve 25, a water storage device 26, and a plate heat exchanger 27. The fan motor system 24 is located at the evaporator 23. The exhaust port of the compressor 21 is connected to the first port of the four-way valve 22. The second port of the four-way valve 22, after passing through the refrigerant heat exchanger piping of the evaporator 23, electronic expansion valve 25, and plate heat exchanger 27, returns to the fourth port of the four-way valve 22. The third port of the four-way valve 22 is connected to the suction port of the compressor 21. The municipal water supply pipe, after passing through the water heat exchanger piping of the plate heat exchanger 27, is connected to the water storage device 26 (such as a water storage tank). The water storage device 26 can output water to domestic water pipes (such as dishwasher water pipes, sink faucet pipes, balcony water pipes, etc.), and then connect to the wastewater sewer network.

[0109] Figure 9 This is a schematic diagram of a single-board heat exchange system 2, representing an embodiment of a kitchen air conditioning system. (See diagram below.) Figure 9 The kitchen air conditioning system shown includes a compressor, a four-way valve, an evaporator, a fan motor system, and an electronic expansion valve (see [reference]). Figure 8In addition to the example shown, it also includes a water storage device 36 and a plate heat exchanger 37. The municipal water inlet pipe, after passing through the water heat exchanger 37, splits into two paths: one path passes through pipes such as cold water faucets and connects to the cold water usage point, where a water storage device 36 is installed. The water storage device 36 can be a water tank, trough, or other water storage container, and its rear end connects to the wastewater drainage network; the other path passes through pipes such as gas water heaters and connects to hot water usage points such as bathing areas, and its rear end connects to the wastewater drainage network. Of course, in Figure 8 and Figure 9 In the example shown, it is also possible to set as follows: Figure 7 The solenoid valve 13 and solenoid shut-off valve 18 are shown.

[0110] In the solution of the present invention, such as Figure 6 As shown, the control device of the air conditioning system includes: an acquisition unit 102 and a control unit 104.

[0111] The control unit 104 is configured to, when the air conditioning system is started and just beginning to operate, control the opening degree of the water flow regulating switch to a set initial opening degree and control the bypass switch to close. The specific functions and processing of the control unit 104 are described in step S110.

[0112] The acquisition unit 102 is configured to acquire the temperature at the outlet of the water-side heat exchange pipe of the water-cooled plate heat exchanger after the air conditioning system has been running for a first set time, and record it as the current outlet water temperature of the air conditioning system, such as the outlet water temperature of the outdoor unit condenser, denoted as T. 3感温包 The specific functions and processing of the acquisition unit 102 are described in step S120. Specifically, Figure 10 This is a schematic diagram of the control logic for an embodiment of a water-saving control method for a kitchen air conditioning system, specifically showing the control logic of solenoid valve 13 and solenoid shut-off valve 18 in the kitchen air conditioning system. For example... Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system includes: Step 1: After the kitchen air conditioning system is turned on, the opening degree of the solenoid valve 13 is controlled to be the initial opening degree, such as 50%, and the solenoid shut-off valve 18 of the bypass branch is controlled to close; after the kitchen air conditioning system has been running for a first set time, such as 3 minutes, Step 2 and Step 3 are executed.

[0113] The control unit 104 is also configured to perform linkage control on the opening degree of the throttling mechanism based on the target discharge temperature of the compressor. The specific functions and processing of the control unit 104 are further described in step S130. Specifically, as... Figure 10As shown, the control logic of the water-saving control method for the kitchen air conditioning system also includes: Step 2, limiting the compressor's exhaust temperature to a maximum of 100°C, and performing linkage control on the compressor's target exhaust temperature and the opening of the electronic expansion valve, which can be implemented using separate fuzzy control logic; and performing unit protection and various fault detection controls for the kitchen air conditioning system, which can be implemented using additional protection logic.

[0114] The control unit 104 is further configured to adjust the opening degree of the outlet water flow regulating switch according to the current outlet water temperature of the air conditioning system, and to control the opening and closing of the bypass switch. The specific functions and processing of the control unit 104 are further described in step S140. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: Step 3, detecting the outlet water temperature of the outdoor unit condenser using a temperature sensor, such as temperature sensor T3, at the outlet of the outdoor unit condenser, and recording the detected outlet water temperature of the outdoor unit condenser as T. 3感温包 This controls the opening degree of the solenoid valve 13 and the opening and closing of the solenoid shut-off valve 18 accordingly.

[0115] The water-saving control scheme for a kitchen air conditioning system provided by this invention uses a water-cooled plate heat exchanger as the outdoor unit condenser of the air conditioning system. The kitchen tap water is used for the first condensation in the water-cooled plate heat exchanger, and then the refrigerant evaporated in the indoor unit evaporator is used for the second condensation. By reducing the temperature of the refrigerant before throttling through the two condensation processes, energy saving and water reduction are achieved. Furthermore, by detecting the temperature of the air conditioning system, the on / off state of the secondary throttling bypass branch is controlled, thereby adjusting the cooling effect of the refrigerant and improving the reliability of the air conditioning system.

[0116] In this invention, a compact heat exchanger (i.e., a water-cooled plate heat exchanger) is used to achieve small-space assembly. The first cooling process utilizes tap water, and the second cooling process utilizes evaporator exhaust gas (which can recover some of the evaporator's cooling capacity). An on / off solenoid valve (such as solenoid shut-off valve 18) is also installed next to the second cooling process to control the refrigerant flow rate (meeting the cooling load requirements while recovering some cooling capacity for pre-throttling cooling). In this invention, both the tap water flow rate and the refrigerant flow rate for primary and secondary cooling are adjustable and controllable, such as adjusting according to the actual cooling load and exhaust temperature of the air conditioning system. Furthermore, it can achieve logical control adjustment based on load changes, resulting in a compact structure, high heat exchange efficiency, and intelligent water and energy saving.

[0117] In some embodiments, the control unit 104 adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system. This includes a first process of adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature, as detailed below:

[0118] The control unit 104 is further configured to determine the sum of the set target outlet water temperature and the set hysteresis temperature, denoted as the set maximum outlet water temperature; and to determine the difference between the set target outlet water temperature and the set hysteresis temperature, denoted as the set minimum outlet water temperature. The specific functions and processing of the control unit 104 are further described in step S210. For example, the set target outlet water temperature is 65°C, and the set hysteresis temperature is 2°C.

[0119] The control unit 104 is further configured to determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature. The specific functions and processing of the control unit 104 are further described in step S220.

[0120] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system further includes: in step 3, setting the target outlet water temperature of the outdoor unit condenser, such as 65℃, and setting the hysteresis temperature, such as 2℃. When the opening degree of the solenoid valve 13 is the set initial opening degree, such as 50%, the solenoid shut-off valve 18 is closed, and the entire kitchen air conditioning system has been running for a first set time, such as 3 minutes, the outlet water temperature of the outdoor unit condenser is detected by the temperature sensing element at the outlet of the outdoor unit condenser, such as temperature sensing element T3, and the detected outlet water temperature of the outdoor unit condenser is recorded as T. 3感温包 And determine whether the following condition is met: the detected outlet water temperature T of the outdoor unit condenser. 3感温包 If the temperature is between the difference between the target outlet water temperature and the hysteresis temperature (e.g., 65℃-2℃=63℃) and the sum of the target outlet water temperature and the hysteresis temperature (e.g., 65℃+2℃=67℃), and does not exceed the set maximum outlet water temperature (e.g., 70℃), the opening degree of the solenoid valve 13 and the opening and closing of the solenoid shut-off valve 18 are controlled according to the judgment result, and then step 4 is executed.

[0121] The control unit 104 is further configured to, if it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, maintain the opening of the outlet water flow regulating switch at its current opening and keep the bypass switch closed. The specific functions and processing of this control unit 104 are further described in step S230. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system further includes: in step 3, when the opening degree of the solenoid valve 13 is the set initial opening degree, such as 50%, the solenoid shut-off valve 18 is closed, and the entire kitchen air conditioning system has been running for a first set time, such as 3 minutes, if the judgment result is that the outlet water temperature T of the outdoor unit condenser is... 3感温包If the temperature is greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, then the opening of the solenoid valve 13 is controlled to maintain the initial opening, such as 50%, and the solenoid shut-off valve 18 is controlled to remain closed.

[0122] The control unit 104 is further configured to, if it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, reduce the opening of the outlet water flow regulating switch by decreasing it by a first set opening at second set time intervals, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been reduced to the set minimum opening, at which point the reduction stops and the opening of the outlet water flow regulating switch is maintained at the current opening; or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature but less than the set maximum outlet water temperature, at which point the reduction stops and the opening of the outlet water flow regulating switch is maintained at the current opening; simultaneously, the bypass switch is kept closed. The specific functions and processing of this control unit 104 are further described in step S240. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system further includes: in step 3, when the opening degree of the solenoid valve 13 is the set initial opening degree, such as 50%, the solenoid shut-off valve 18 is closed, and the entire kitchen air conditioning system has been running for a first set time, such as 3 minutes, if the judgment result is that the outlet water temperature T of the outdoor unit condenser is... 3感温包 If the difference between the target outlet water temperature and the hysteresis temperature is less than or equal to the target temperature, such as 65℃-2℃=63℃, then the opening of the solenoid valve 13 will be reduced from the initial set opening (e.g., 50%), decreasing by 10% every second set time interval (e.g., 60 seconds), until it reaches the minimum set opening (e.g., 20%), until the outlet water temperature of the outdoor unit condenser reaches T. 3感温包 The temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening of the solenoid valve 13 has been reduced to the set minimum opening, such as 20%, then the opening of the solenoid valve 13 is maintained at the set minimum opening, such as 20%.

[0123] The control unit 104 is further configured to, if it is determined that the current outlet water temperature of the air conditioning system is greater than or equal to the set maximum outlet water temperature, maintain or increase the opening degree of the outlet water flow regulating switch based on the current opening degree of the outlet water flow regulating switch, until the current opening degree of the outlet water flow regulating switch has been increased to the set maximum opening degree, then stop increasing the opening degree and maintain the opening degree of the outlet water flow regulating switch at the current opening degree, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then stop increasing the opening degree and maintain the opening degree of the outlet water flow regulating switch at the current opening degree; simultaneously, control the bypass switch to open. The specific functions and processing of this control unit 104 are further described in step S250. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system further includes: in step 3, when the opening degree of the solenoid valve 13 is the set initial opening degree, such as 50%, the solenoid shut-off valve 18 is closed, and the entire kitchen air conditioning system has been running for a first set time, such as 3 minutes, if the judgment result is that the outlet water temperature T of the outdoor unit condenser is... 3感温包 If the temperature is greater than or equal to the sum of the target outlet water temperature and the hysteresis temperature (e.g., 65℃ + 2℃ = 67℃) and does not exceed the set maximum outlet water temperature (e.g., 70℃), then the opening of the solenoid valve 13 is maintained at the set initial opening (e.g., 50%), or the opening of the solenoid valve 13 is increased based on the set initial opening (e.g., 50%), and increased to the set maximum opening (e.g., 100%), until the outlet water temperature T of the outdoor unit condenser reaches a certain level. 3感温包 The temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, and the solenoid shut-off valve 18 is opened simultaneously. If the opening degree of the solenoid valve 13 has increased to the set maximum opening degree, such as 100%, then the opening degree of the solenoid valve 13 is controlled to be maintained at the set maximum opening degree, such as 100%.

[0124] In some embodiments, the control unit 104 adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system. The second process further includes: adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature, as detailed below:

[0125] The control unit 104 is further configured to continue determining whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature. The specific functions and processing of this control unit 104 are further described in step S310. Specifically, as follows... Figure 10As shown, the control logic of the water-saving control method for a kitchen air conditioning system also includes: Step 4, after executing Step 3, further determining whether the following condition is met: the detected outlet water temperature T of the outdoor unit condenser. 3感温包 If the temperature is between the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, then the opening degree of the solenoid valve 13 and / or the action of the solenoid shut-off valve 18 are restricted based on the judgment result, and then step 5 is executed.

[0126] The control unit 104 is further configured to prevent the opening of the water flow regulating switch from increasing if the current outlet water temperature of the air conditioning system is determined to be less than or equal to the set minimum outlet water temperature. The specific functions and processing of this control unit 104 are further described in step S320. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: after executing step 3, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the temperature difference between the target outlet water temperature and the hysteresis temperature is less than or equal to the temperature difference between the outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, then the opening degree of solenoid valve 13 is not allowed to be large.

[0127] The control unit 104 is further configured to, if it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then disable the outlet water flow regulation switch and disable the bypass switch. The specific functions and processing of this control unit 104 are further described in step S330. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: after executing step 3, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the opening of the solenoid valve 13 is not allowed to be adjusted, and the solenoid shut-off valve 18 is not allowed to operate, the difference between the target outlet water temperature and the hysteresis temperature is greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and the difference is less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃.

[0128] The control unit 104 is further configured to prevent the opening of the water flow regulating switch from decreasing if it is determined that the current outlet water temperature of the air conditioning system is greater than the set maximum outlet water temperature. The specific functions and processing of this control unit 104 are further described in step S340. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: after executing step 3, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the temperature exceeds the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃ + 2℃ = 67℃, then the opening of solenoid valve 13 is not allowed to be reduced.

[0129] In some embodiments, the control unit 104 adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system. The third process further includes: adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature, as detailed below:

[0130] The control unit 104 is further configured to continue determining whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature. The specific functions and processing of this control unit 104 are further described in step S410. Specifically, as follows... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: Step 5, after executing Step 4, continuing to determine whether the following condition is met: the detected outlet water temperature T of the outdoor unit condenser. 3感温包 If the temperature is between the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, the opening of the solenoid valve 13 is further adjusted according to the judgment result, and then step 6 is executed.

[0131] The control unit 104 is further configured to, if it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, reduce the opening of the outlet water flow regulating switch by decreasing it by a first set opening at second set time intervals, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been reduced to the set minimum opening, at which point the reduction stops and the opening of the outlet water flow regulating switch is maintained at the current opening; or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature but less than or equal to the set maximum outlet water temperature, at which point the reduction stops and the opening of the outlet water flow regulating switch is maintained at the current opening. The specific functions and processing of this control unit 104 are further described in step S420. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: in step 5, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the difference between the target outlet water temperature and the hysteresis temperature is less than or equal to the target temperature, such as 65℃ - 2℃ = 63℃, then the opening of the solenoid valve 13 will be reduced from its current opening by a 10% reduction at second set time intervals, such as 60 seconds, until it reaches a minimum set opening of 20%, until the outlet water temperature T of the outdoor unit condenser reaches a minimum set opening. 3感温包The opening temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening degree of the solenoid valve 13 has been reduced to the set minimum opening degree, such as 20%, then the opening degree of the solenoid valve 13 is maintained at the set minimum opening degree, such as 20%.

[0132] The control unit 104 is further configured to, if it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature, maintain the opening of the outlet water flow regulating switch at its current opening. The specific function and processing of this control unit 104 are further described in step S430. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: in step 5, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the opening temperature is greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃, then the opening degree of the control solenoid valve 13 will be maintained at the current opening degree.

[0133] The control unit 104 is further configured to, if it is determined that the current outlet water temperature of the air conditioning system is greater than the set maximum outlet water temperature, increase the opening of the outlet water flow regulating switch by a first set opening degree at third set time intervals, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been increased to the set maximum opening degree, at which point the increase in opening stops and the opening of the outlet water flow regulating switch is maintained at the current opening degree; or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature but less than or equal to the set maximum outlet water temperature, at which point the increase in opening stops and the opening of the outlet water flow regulating switch is maintained at the current opening degree. The specific functions and processing of this control unit 104 are further described in step S440.

[0134] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: in step 5, if the detected outlet water temperature T of the outdoor unit condenser... 3感温包 If the temperature exceeds the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃ + 2℃ = 67℃, then the opening of solenoid valve 13 will increase from its current opening by a first set opening degree, such as 10%, every third set time interval, such as 10 seconds. This will continue until the opening of solenoid valve 13 reaches the set maximum opening degree, such as 100%, until the outlet water temperature T of the outdoor unit condenser reaches its maximum. 3感温包The opening temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening degree of the solenoid valve 13 has increased to the set maximum opening degree, such as 100%, then the opening degree of the solenoid valve 13 is maintained at the set maximum opening degree, such as 100%.

[0135] In some embodiments, the control unit 104 adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system. The process further includes a fourth step: adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature, as detailed below:

[0136] The control unit 104 is further configured to record the current outlet water temperature of the air conditioning system every second preset time interval and determine the rate of temperature rise of the current outlet water temperature of the air conditioning system. The specific functions and processing of the control unit 104 are further described in step S510.

[0137] The control unit 104 is further configured to determine whether the difference between the current outlet water temperature of the air conditioning system recorded in the (n+1)th time and the current outlet water temperature of the air conditioning system recorded in the (n+2)th time is equal to 0, and whether the difference between the current outlet water temperature of the air conditioning system recorded in the nth time and the current outlet water temperature of the air conditioning system recorded in the (n+1)th time is equal to 0; where n represents the number of times the current outlet water temperature of the air conditioning system is recorded and is a positive integer. The specific functions and processing of this control unit 104 are further described in step S520.

[0138] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system also includes: Step 6, detecting and recording the outlet water temperature T of the outdoor unit condenser every second set time, such as 60 seconds. 3感温包 The value of T is used to determine the outlet water temperature T of the outdoor unit condenser. 3感温包 The temperature rise rate is determined, and the opening degree of solenoid valve 13 is controlled according to the judgment result. Then, steps 7, 8 and 9 are executed.

[0139] In step 6, first determine whether the following condition is met: T 3感温包n+1 -T 3感温包n+2 ≠0, T 3感温包n -T 3感温包n+1 If the result is not 0, then proceed to step 61 or step 62 based on the judgment result, followed by steps 7, 8, and 9. Where T... 3感温包n The nth time the outlet water temperature T of the outdoor unit condenser was detected and recorded. 3感温包 The value of T 3感温包n+1 The (n+1)th time the outlet water temperature T of the outdoor unit condenser was detected and recorded. 3感温包The value of T 3感温包n+2 The (n+2)th time the water temperature T of the outdoor unit condenser was detected and recorded. 3感温包 The value of n, where n is a positive integer.

[0140] The control unit 104 is further configured to maintain the opening degree of the outlet flow rate regulating switch at its current opening degree if the condition is met. The specific functions and processing of this control unit 104 are further described in step S530. Specifically, as... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: Step 6 includes: Step 61, if T is satisfied... 3感温包n+1 -T 3感温包n+2 =0, and T 3感温包n -T 3感温包n+1 =0, which means the outlet water temperature T of the outdoor unit condenser is 0. 3感温包 No change was observed; at this time, the outlet water temperature T of the outdoor unit condenser remained unchanged. 3感温包 During the stable phase, the opening of solenoid valve 13 is maintained.

[0141] The control unit 104 is further configured to, if the condition is not met, record the difference between the current outlet water temperature of the air conditioning system recorded in the nth time and the current outlet water temperature of the air conditioning system recorded in the (n+1)th time as a first difference, record the difference between the current outlet water temperature of the air conditioning system recorded in the (n+1)th time and the current outlet water temperature of the air conditioning system recorded in the (n+2)th time as a second difference, and determine the ratio of the first difference to the second difference as the temperature rise rate of the current outlet water temperature of the air conditioning system. The specific functions and processing of this control unit 104 are further described in step S540.

[0142] The control unit 104 is further configured to reduce the opening degree of the outlet water flow regulating switch if the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than 1. The specific functions and processing of this control unit 104 are further described in step S550.

[0143] The control unit 104 is further configured to maintain the opening degree of the outlet water flow regulating switch at its current opening degree if the temperature rise rate of the current outlet water temperature of the air conditioning system is equal to 1. The specific functions and processing of this control unit 104 are further described in step S560.

[0144] The control unit 104 is further configured to, if the rate of temperature rise of the current outlet water temperature of the air conditioning system is less than 1, increase the opening degree of the outlet water flow regulating switch based on the current opening degree of the outlet water flow regulating switch. The specific functions and processing of this control unit 104 are further described in step S570.

[0145] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system further includes: Step 6 includes: Step 62, if T is not satisfied... 3感温包n+1 -T 3感温包n+2 =0, and T 3感温包n -T 3感温包n+1 =0, then the outlet water temperature T of the outdoor unit condenser 3感温包 The rate of temperature rise Δ 温升速率 =(T 3感温包n -T 3感温包n+1 ) / (T 3感温包n+1 -T 3感温包n+2 Determine the outlet water temperature T of the outdoor unit condenser. 3感温包 Temperature rise and fall trend:

[0146] If the outlet water temperature of the outdoor unit condenser is T 3感温包 The rate of temperature rise Δ 温升速率 If the value is greater than 1, it indicates that the outlet water temperature T of the outdoor unit condenser is... 3感温包 The rate of temperature rise Δ 温升速率 Slow down the opening of solenoid valve 13. This reduction can be achieved by decreasing the opening of solenoid valve 13 from its current position at intervals of 10% (e.g., every 60 seconds, after a second set time interval), until the opening is reduced to a minimum set opening (e.g., 20%), until the outlet water temperature T of the outdoor unit condenser decreases. 3感温包 The opening temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening degree of the solenoid valve 13 has been reduced to the set minimum opening degree, such as 20%, then the opening degree of the solenoid valve 13 is maintained at the set minimum opening degree, such as 20%.

[0147] If the outlet water temperature of the outdoor unit condenser is T 3感温包 The rate of temperature rise Δ 温升速率 =1 indicates that the outlet water temperature T of the outdoor unit condenser is 1. 3感温包 The rate of temperature rise Δ 温升速率 Maintain the level, and keep the opening of the solenoid valve 13 level.

[0148] If the outlet water temperature of the outdoor unit condenser is T 3感温包 The rate of temperature rise Δ 温升速率 If <1, it indicates that the outlet water temperature T of the outdoor unit condenser is... 3感温包 The rate of temperature rise Δ 温升速率Accelerate the process by increasing the opening of solenoid valve 13. This increase can be achieved by: increasing the opening of solenoid valve 13 by a predetermined percentage (e.g., 10%) every third set time interval (e.g., 10 seconds), from its current opening, until the maximum opening (e.g., 100%) is reached, until the outlet water temperature T of the outdoor unit condenser increases. 3感温包 The opening temperature is controlled to be greater than the difference between the target outlet water temperature and the hysteresis temperature, such as 65℃-2℃=63℃, and less than or equal to the sum of the target outlet water temperature and the hysteresis temperature, such as 65℃+2℃=67℃. If the opening degree of the solenoid valve 13 has increased to the set maximum opening degree, such as 100%, then the opening degree of the solenoid valve 13 is maintained at the set maximum opening degree, such as 100%.

[0149] In some embodiments, the control unit 104 adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system. The process further includes a fifth and / or a sixth process: adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature, as detailed below:

[0150] Fifth process: The control unit 104 is specifically configured to count once each time the temperature rise rate of the current outlet water temperature of the air conditioning system is determined, obtaining the count count; that is, to accumulate the number of times the temperature rise rate of the current outlet water temperature of the air conditioning system is determined, obtaining the count count; until the air conditioning system is turned off, the count count is reset to zero so that it can be counted again for the next determination, and then returns to the previous state so that after the next startup, the opening degree of the outlet water flow regulating switch is adjusted again according to the current outlet water temperature of the air conditioning system, and the opening and closing of the bypass switch is controlled. Specifically, as shown in the figure... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system also includes: Step 7, assuming that the outlet water temperature T of the outdoor unit condenser is every second set time, such as 60 seconds. 3感温包 The value is detected and recorded for n times. Each time step 6 is executed, the count n increases by one, and then returns to 2. If the air conditioning system is turned off, the count n is reset to zero and the count restarts.

[0151] The sixth process: The control unit 104 is further configured to, if it is determined that the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than or equal to 1, and it is determined that the current outlet water temperature of the air conditioning system exceeds the set maximum outlet water temperature and the duration exceeds a fourth set time, then determine that the outlet water flow regulating switch is faulty or the air conditioning system is shut off, and initiate a reminder message. Specifically, as shown below... Figure 10 As shown, the control logic of the water-saving control method for a kitchen air conditioning system also includes: Step 8, if the outlet water temperature T of the outdoor unit condenser is detected...3感温包 The rate of temperature rise Δ 温升速率 Slow down or remain the same, the outlet water temperature T of the outdoor unit condenser 3感温包 If the water temperature exceeds the set maximum outlet temperature, such as 70℃, and the duration exceeds the fourth set time, such as 120s, it is determined that the outdoor unit condenser is shut off or the solenoid valve 13 is faulty. A shutdown command is issued to execute step 10 and a buzzer alarm is sounded to prompt the user to verify whether the condensate valve (i.e., solenoid valve 13) is faulty and closed or whether there is a water outage.

[0152] In some embodiments, the control unit 104 adjusts the opening degree of the outlet water flow regulating switch and controls the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system, and further includes a seventh process of adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature, as follows:

[0153] The seventh process: The control unit 104 is further configured to, if it is determined that the overall running time of the air conditioning system exceeds the fifth set time, the current outlet water temperature of the air conditioning system is less than or equal to the set target outlet water temperature, and the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than or equal to 1, then control the bypass switch to close, and then return to adjust the opening degree of the outlet water flow regulating switch according to the current outlet water temperature of the air conditioning system after the next startup, and control the opening and closing of the bypass switch.

[0154] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system also includes: Step 9, when the solenoid shut-off valve 18 of the bypass branch is already open, determining whether the following conditions are met: the continuous running time of the entire kitchen air conditioning system has exceeded the fifth set time, such as 10 minutes, and the outlet water temperature T of the outdoor unit condenser. 3感温包 Less than or equal to the target outlet water temperature, such as 65℃, and the outlet water temperature T of the outdoor unit condenser. 3感温包 The rate of temperature rise Δ 温升速率 If the value is ≥1, then the electromagnetic shut-off valve 18 is closed, and then the process returns to step 2.

[0155] Specifically, such as Figure 10 As shown, the control logic of the water-saving control method for the kitchen air conditioning system also includes: Step 10, after controlling the kitchen air conditioning system to stop, returning to Step 1, so as to return to Step 1 the next time the kitchen air conditioning system is turned on.

[0156] Referring to steps 1 to 10, in the solution of the present invention, the temperature value T detected by the temperature sensing bag T3 is determined. 3感温包The system determines the outlet water temperature of the outdoor unit condenser. If, with the solenoid valve 13 at its initial opening (e.g., 50%), the outlet water temperature does not exceed 70℃ after a first set time (e.g., 180 seconds) and remains within the target temperature range (e.g., 63℃~67℃), then the opening of the solenoid valve 13 remains unchanged. If, with the solenoid valve 13 at its initial opening (e.g., 50%), the outlet water temperature falls below 63℃ after a first set time (e.g., 180 seconds), then the opening of the solenoid valve 13 is adjusted at a set reduction rate (e.g., 10% / 60 seconds) until the outlet water temperature reaches the target temperature range. If, with the solenoid valve 13 at its initial opening (e.g., 50%), the outlet water temperature of the outdoor unit condenser exceeds 67°C after a first set time (e.g., 180 seconds), the solenoid valve 13 will open to 100%, and simultaneously, the bypass branch containing the solenoid shut-off valve 18 will open. The opening of the solenoid valve 13 can be adjusted according to the outlet water temperature of the outdoor unit condenser and its temperature rise / fall trend. This allows for matching of condensate water usage with the condensate load, minimizing water consumption and achieving energy and water conservation goals.

[0157] In the present invention, the outdoor unit condenser (such as a water-cooled plate heat exchanger 12) is only water-cooled and has an intermediate heat recovery device (such as a plate heat exchanger 17). The main purpose is to save condensing water consumption, which is mainly achieved by absorbing the condenser's cooling capacity and the refrigerant's cooling capacity after evaporation and heat absorption. Specifically, by replacing the outdoor unit condenser with a water-cooled plate heat exchanger, the size of the outdoor unit can be miniaturized, improving installation flexibility. Through two heat exchange cycles using the water-cooled plate heat exchanger, the cooling demand is met while reducing the cooling water consumption of the outdoor unit condenser, saving condensing water consumption and achieving water conservation goals. The heat recovery device recovers the cooling capacity of the evaporator, improving the heat exchange efficiency of the air conditioning system and achieving energy saving and consumption reduction. Thus, the air conditioning system achieves its cooling effect, producing hot water while cooling, meeting the hot water needs during cooking and cleaning, and enabling the recovery and reuse of condensate from the outdoor unit. Through dual plate heat exchangers (i.e., two water-cooled plate heat exchangers), it can both produce hot water and recover and reuse the excess cooling energy after heat exchange from the evaporator, achieving energy saving while reducing condensate water consumption, thus saving water compared to using a single water-cooled heat exchanger.

[0158] In the present invention, according to the above embodiments, the form of heat exchanger, the form of throttling component, etc. can be adjusted accordingly. The embodiments mentioned above are only the most basic embodiments and should not be construed as limiting the present invention.

[0159] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0160] The technical solution of this invention addresses a kitchen air conditioning system. This system includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a throttling mechanism (such as an electronic expansion valve). A water-cooled plate heat exchanger is used as the outdoor heat exchanger (such as an outdoor unit condenser), and a plate heat exchanger is installed between the outdoor and indoor heat exchangers as a heat recovery device. The plate heat exchanger has a first heat exchange pipe and a second heat exchange pipe. The first heat exchange pipe of the water-cooled plate heat exchanger is for refrigerant side exchange. The heat exchange pipes and the second heat exchange pipe are water-side heat exchange pipes. The compressor's exhaust port passes through the refrigerant-side heat exchange pipes of the water-cooled plate heat exchanger, the first heat exchange pipe of the plate heat exchanger, the throttling mechanism, and the indoor heat exchanger, and then returns to the compressor's suction port through the second heat exchange pipe of the plate heat exchanger. A solenoid valve is installed on the pipe where the water-side heat exchange pipe of the water-cooled plate heat exchanger is located. The outlet pipe of the indoor heat exchanger and the outlet pipe of the second heat exchange pipe of the plate heat exchanger are connected. A bypass branch is provided, and an electromagnetic shut-off valve is installed on this bypass branch. When the kitchen air conditioning system is turned on and just starting up, the opening of the electromagnetic valve is controlled to the initial set opening, and the electromagnetic shut-off valve is controlled to close. After the whole unit runs in this manner for the first set time, the opening of the electromagnetic valve is adjusted according to the temperature and its rise and fall trend of the outlet of the water-side heat exchanger of the water-cooled plate heat exchanger, and in combination with the running time of the whole unit, and the opening and closing of the electromagnetic shut-off valve is controlled to match the condensing water and condensing load of the water-cooled plate heat exchanger. Thus, by replacing the condenser of the outdoor unit of the air conditioning system with a water-cooled plate heat exchanger, the size of the outdoor unit can be reduced, and the installation flexibility can be improved. Through two heat exchanges by the water-cooled plate heat exchanger, the cooling water consumption of the outdoor unit condenser is reduced while meeting the cooling demand, saving condensing water and achieving the goal of water conservation. The heat recovery device recovers the cold energy of the evaporator, improves the heat exchange efficiency of the air conditioning system, and achieves energy saving and consumption reduction.

[0161] According to an embodiment of the present invention, an air conditioning system corresponding to a control device for an air conditioning system is also provided. This air conditioning system may include the control device for the air conditioning system described above.

[0162] Since the processing and functions implemented by the air conditioning system in this embodiment are basically the same as those of the aforementioned device embodiments, principles and examples, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0163] The technical solution of this invention addresses a kitchen air conditioning system. This system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a throttling mechanism (such as an electronic expansion valve). A water-cooled plate heat exchanger is used as the outdoor heat exchanger (such as an outdoor unit condenser), and a plate heat exchanger is installed between the outdoor and indoor heat exchangers as a heat recovery device. The plate heat exchanger has a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline of the water-cooled plate heat exchanger is a refrigerant-side heat exchange pipeline, and the second heat exchange pipeline is a water-side heat exchange pipeline. The compressor's exhaust port passes through the refrigerant-side heat exchange pipeline of the water-cooled plate heat exchanger, the first heat exchange pipeline of the plate heat exchanger, the throttling mechanism, and the indoor heat exchanger, and then returns to the compressor's suction port through the second heat exchange pipeline of the plate heat exchanger. A solenoid valve is installed on the pipeline where the water outlet of the water-side heat exchange pipeline of the water-cooled plate heat exchanger is located. A bypass branch is installed between the outlet pipe of the plate heat exchanger and the outlet pipe of the second heat exchange pipe. An electromagnetic shut-off valve is installed on this bypass branch. When the kitchen air conditioning system is first started, the opening of the electromagnetic valve is controlled to the initial set opening, and the electromagnetic shut-off valve is closed. After the entire unit operates in this manner for the first set time, based on the temperature and its rising / falling trend at the outlet of the water-side heat exchanger of the water-cooled plate heat exchanger, and combined with the overall operating time of the unit, the opening of the electromagnetic valve is adjusted, and the opening and closing of the electromagnetic shut-off valve is controlled to match the condensing water and condensing load of the water-cooled plate heat exchanger. Thus, by reducing the refrigerant temperature before throttling through two condensation cycles, energy savings and water reduction are achieved. Furthermore, by detecting the temperature of the air conditioning system, the on / off state of the secondary throttling bypass branch is controlled, thereby adjusting the refrigerant cooling effect and improving the reliability of the air conditioning system.

[0164] According to an embodiment of the present invention, a storage medium corresponding to a control method for an air conditioning system is also provided. The storage medium includes a stored program, wherein the program controls the device where the storage medium is located to execute the control method for the air conditioning system described above when it is executed.

[0165] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0166] The technical solution of this invention addresses a kitchen air conditioning system. This system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a throttling mechanism (such as an electronic expansion valve). A water-cooled plate heat exchanger is used as the outdoor heat exchanger (such as an outdoor unit condenser), and a plate heat exchanger is installed between the outdoor and indoor heat exchangers as a heat recovery device. The plate heat exchanger has a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline of the water-cooled plate heat exchanger is a refrigerant-side heat exchange pipeline, and the second heat exchange pipeline is a water-side heat exchange pipeline. The compressor's exhaust port passes through the refrigerant-side heat exchange pipeline of the water-cooled plate heat exchanger, the first heat exchange pipeline of the plate heat exchanger, the throttling mechanism, and the indoor heat exchanger, and then returns to the compressor's suction port through the second heat exchange pipeline of the plate heat exchanger. A water outlet of the water-side heat exchange pipeline of the water-cooled plate heat exchanger is installed on the pipeline... The system includes a solenoid valve and a bypass branch with a solenoid shut-off valve installed on the bypass branch between the outlet pipe of the indoor heat exchanger and the outlet pipe of the second heat exchange pipe of the plate heat exchanger. When the kitchen air conditioning system is initially started, the solenoid valve is initially opened to the set opening degree, and the solenoid shut-off valve is closed. After the system has been running in this manner for a set period, the opening degree of the solenoid valve is adjusted based on the temperature and its rising / falling trend at the outlet of the water-side heat exchanger of the water-cooled plate heat exchanger, combined with the overall operating time of the system. This ensures that the condensing water and condensing load of the water-cooled plate heat exchanger are matched. Therefore, the system can be adjusted according to the actual cooling load and exhaust temperature of the air conditioning system, and can achieve logical control adjustment based on load changes. It features a compact structure, high heat exchange efficiency, and intelligent water and energy saving.

[0167] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0168] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A control method for an air conditioning system, characterized in that, The air conditioning system includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism. The first heat exchanger is a water-cooled plate heat exchanger, and the second heat exchanger is a plate heat exchanger. A bypass pipe is provided between the common end of the third heat exchanger and the plate heat exchanger, and between the common end of the plate heat exchanger and the compressor. The compressor's exhaust port passes through the refrigerant-side heat exchange pipe of the water-cooled plate heat exchanger, the first heat exchange pipe of the plate heat exchanger, and the throttling mechanism. After the third heat exchanger, the refrigerant is divided into two paths: one path exits through the second heat exchange pipe of the plate heat exchanger, and the other path exits through the bypass pipe. The refrigerant exiting from the bypass pipe and the refrigerant exiting from the second heat exchange pipe of the plate heat exchanger merge and return to the suction port of the compressor. A water flow regulating switch is installed on the outlet pipe of the water-side heat exchange pipe of the water-cooled plate heat exchanger. A bypass switch is installed on the bypass pipe. The control method of the air conditioning system includes: When the air conditioning system is turned on and just starting to run, the opening degree of the water flow regulating switch is controlled to the set initial opening degree, and the bypass switch is controlled to be closed. After the air conditioning system has been running for a first set time, the temperature at the outlet of the water-side heat exchange pipeline of the water-cooled plate heat exchanger is obtained and recorded as the current outlet water temperature of the air conditioning system. The opening degree of the throttling mechanism is controlled in conjunction with the target exhaust temperature of the compressor. Adjust the opening degree of the outlet water flow regulating switch according to the current outlet water temperature of the air conditioning system, and control the opening and closing of the bypass switch.

2. The control method for the air conditioning system according to claim 1, characterized in that, Adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch according to the current outlet water temperature of the air conditioning system includes: The sum of the target outlet temperature and the set hysteresis temperature is determined and recorded as the maximum outlet temperature; the difference between the target outlet temperature and the set hysteresis temperature is determined and recorded as the minimum outlet temperature. Determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; If it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then the opening degree of the outlet water flow regulating switch is maintained at the current opening degree of the outlet water flow regulating switch, and the bypass switch is kept closed. If it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then the opening of the outlet water flow regulating switch is reduced by a first set opening at second set time intervals, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been reduced to the set minimum opening, at which point the reduction stops and the opening of the outlet water flow regulating switch is maintained at the current opening; or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature but less than the set maximum outlet water temperature, at which point the reduction stops and the opening of the outlet water flow regulating switch is maintained at the current opening; simultaneously, the bypass switch remains closed. If it is determined that the current outlet water temperature of the air conditioning system is greater than or equal to the set maximum outlet water temperature, then the opening of the outlet water flow regulating switch is maintained or increased based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been increased to the set maximum opening, at which point the increase in opening stops and the opening of the outlet water flow regulating switch is maintained at the current opening, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, at which point the increase in opening stops and the opening of the outlet water flow regulating switch is maintained at the current opening; simultaneously, the bypass switch is controlled to open.

3. The control method for the air conditioning system according to claim 2, characterized in that, The system further includes adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch based on the current outlet water temperature of the air conditioning system. Continue to determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; If it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then the opening degree of the outlet water flow regulating switch is prohibited from being increased. If it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature, then the outlet water flow regulating switch is prohibited from operating, and the bypass switch is also prohibited from operating. If it is determined that the current outlet water temperature of the air conditioning system is greater than the set maximum outlet water temperature, then the opening degree of the outlet water flow regulating switch is prohibited from being reduced.

4. The control method for the air conditioning system according to claim 3, characterized in that, The system further includes adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch based on the current outlet water temperature of the air conditioning system. Continue to determine whether the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than the set maximum outlet water temperature; If it is determined that the current outlet water temperature of the air conditioning system is less than or equal to the set minimum outlet water temperature, then the opening of the outlet water flow regulating switch is reduced by a first set opening at second set time intervals, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been reduced to the set minimum opening, at which point the reduction stops and the opening of the outlet water flow regulating switch is maintained at the current opening, or until the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature, at which point the reduction stops and the opening of the outlet water flow regulating switch is maintained at the current opening. If it is determined that the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature, then the opening degree of the outlet water flow regulating switch is maintained at the current opening degree of the outlet water flow regulating switch. If it is determined that the current outlet water temperature of the air conditioning system is greater than the set maximum outlet water temperature, then the opening of the outlet water flow regulating switch is increased by a first set opening at third set time intervals, based on the current opening of the outlet water flow regulating switch, until the current opening of the outlet water flow regulating switch has been increased to the set maximum opening. At this point, the increase in opening stops and the opening of the outlet water flow regulating switch is maintained at the current opening. Alternatively, the opening stops and the opening of the outlet water flow regulating switch is maintained at the current opening when the current outlet water temperature of the air conditioning system is greater than the set minimum outlet water temperature and less than or equal to the set maximum outlet water temperature.

5. The control method for an air conditioning system according to any one of claims 1 to 4, characterized in that, The system further includes adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch based on the current outlet water temperature of the air conditioning system. The current outlet water temperature of the air conditioning system is recorded every second predetermined time interval, and the rate of temperature rise of the current outlet water temperature of the air conditioning system is determined. Determine whether the following conditions are met: the difference between the current outlet water temperature of the air conditioning system recorded in the (n+1)th time and the current outlet water temperature of the air conditioning system recorded in the (n+2)th time is equal to 0, and the difference between the current outlet water temperature of the air conditioning system recorded in the nth time and the current outlet water temperature of the air conditioning system recorded in the (n+1)th time is equal to 0; n represents the number of times the current outlet water temperature of the air conditioning system is recorded and is a positive integer; If the condition is met, the opening degree of the outlet flow rate regulating switch is maintained at the current opening degree of the outlet flow rate regulating switch. If the conditions are not met, the difference between the current outlet water temperature of the air conditioning system recorded in the nth time and the current outlet water temperature of the air conditioning system recorded in the (n+1)th time is recorded as the first difference value, and the difference between the current outlet water temperature of the air conditioning system recorded in the (n+1)th time and the current outlet water temperature of the air conditioning system recorded in the (n+2)th time is recorded as the second difference value. The ratio of the first difference value to the second difference value is determined as the temperature rise rate of the current outlet water temperature of the air conditioning system. If the rate of temperature rise of the current outlet water temperature of the air conditioning system is greater than 1, then the opening degree of the outlet water flow regulating switch is reduced based on the current opening degree of the outlet water flow regulating switch. If the current outlet water temperature of the air conditioning system has a temperature rise rate of 1, then the opening degree of the outlet water flow regulating switch is maintained at the current opening degree of the outlet water flow regulating switch. If the rate of temperature rise of the current outlet water temperature of the air conditioning system is less than 1, then the opening degree of the outlet water flow regulating switch is increased based on the current opening degree of the outlet water flow regulating switch.

6. The control method for an air conditioning system according to claim 5, characterized in that, The system further includes adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch based on the current outlet water temperature of the air conditioning system. The number of times the temperature rise rate of the current outlet water temperature of the air conditioning system is determined is accumulated to obtain the count; the count is reset to zero when the air conditioning system is turned off. And / or, If it is determined that the current outlet water temperature of the air conditioning system has a temperature rise rate greater than or equal to 1, and it is determined that the current outlet water temperature of the air conditioning system exceeds the set maximum outlet water temperature and the duration exceeds the fourth set time, then it is determined that the outlet water flow regulating switch is faulty or the air conditioning system is shut down, and an alert message is sent.

7. The control method for an air conditioning system according to claim 5, characterized in that, The system further includes adjusting the opening degree of the outlet water flow regulating switch and controlling the opening and closing of the bypass switch based on the current outlet water temperature of the air conditioning system. If it is determined that the overall operating time of the air conditioning system exceeds the fifth set time, the current outlet water temperature of the air conditioning system is less than or equal to the set target outlet water temperature, and the temperature rise rate of the current outlet water temperature of the air conditioning system is greater than or equal to 1, then the bypass switch is controlled to close.

8. A control device for an air conditioning system, characterized in that, The air conditioning system includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, and a throttling mechanism. The first heat exchanger is a water-cooled plate heat exchanger, and the second heat exchanger is a plate heat exchanger. A bypass pipe is provided between the common end of the third heat exchanger and the plate heat exchanger, and between the common end of the plate heat exchanger and the compressor. The compressor's exhaust port passes through the refrigerant-side heat exchange pipe of the water-cooled plate heat exchanger, the first heat exchange pipe of the plate heat exchanger, and the throttling mechanism. After the third heat exchanger, the refrigerant splits into two paths: one path exits through the second heat exchange pipe of the plate heat exchanger, and the other path exits through the bypass pipe. The refrigerant exiting from the bypass pipe and the refrigerant exiting from the second heat exchange pipe of the plate heat exchanger merge and return to the suction port of the compressor. A water flow regulating switch is installed on the outlet pipe of the water-side heat exchange pipe of the water-cooled plate heat exchanger. A bypass switch is installed on the bypass pipe. The control device of the air conditioning system includes: The control unit is configured to, when the air conditioning system has just started operating after being turned on, control the opening degree of the water flow regulating switch to a set initial opening degree and control the bypass switch to close. The acquisition unit is configured to acquire the temperature at the outlet of the water-side heat exchange pipeline of the water-cooled plate heat exchanger after the air conditioning system has been running for a first set time, and record it as the current outlet water temperature of the air conditioning system. The control unit is also configured to control the opening degree of the throttling mechanism in conjunction with the target exhaust temperature of the compressor. The control unit is further configured to adjust the opening degree of the outlet water flow regulating switch according to the current outlet water temperature of the air conditioning system, and to control the opening and closing of the bypass switch.

9. An air conditioning system, characterized in that, include: The control device for the air conditioning system as described in claim 8.

10. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, the device containing the storage medium is controlled to perform the control method of the air conditioning system according to any one of claims 1 to 7.

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