Air conditioner anti-freezing method and device, air conditioner and storage medium

Abstract

The embodiment of the invention discloses an air conditioner anti-freezing method and device, an air conditioner and a storage medium. The method is applied to the air conditioner, the air conditioner comprises a compressor, a water side heat exchange device, an air side heat exchange device, a first temperature sensor, a second temperature sensor and a water volume control unit, and the method comprises the steps that the coil pipe temperature corresponding to the air side heat exchange device is collected through the first temperature sensor; the water outlet temperature corresponding to the water side heat exchange device is collected through a second temperature sensor; and under the condition that the coil pipe temperature is larger than a first temperature threshold value and smaller than or equal to a second temperature threshold value, according to the coil pipe temperature and the outlet water temperature, a compressor is controlled to execute frequency adjusting operation, and a water volume control unit is controlled to execute water volume adjusting operation, so that the coil pipe temperature is increased, and the outlet water temperature tends to the target outlet water temperature interval. According to the air conditioner anti-freezing method and device, the air conditioner and the storage medium, the freezing risk of the surface of the heat exchanger of the air conditioner can be effectively reduced, and the hot water using requirement of a user can be met.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, specifically to an air conditioning antifreeze method and device, an air conditioner, and a storage medium. Background Technology

[0002] In related technologies, air conditioners may experience icing on the surface of heat exchangers due to factors such as excessively low evaporation pressure or temperature in the refrigerant circulation system, severely affecting the normal operation of the air conditioner. Therefore, reducing the risk of icing on the surface of air conditioner heat exchangers has become an urgent technical problem to be solved. Summary of the Invention

[0003] This application discloses an air conditioner antifreeze method and device, an air conditioner, and a storage medium, which can effectively reduce the risk of icing on the surface of the air conditioner's heat exchanger, meet the user's need for hot water, and improve the stability of the air conditioner's operation.

[0004] This application discloses an air conditioner antifreeze method, applied to an air conditioner. The air conditioner includes a compressor, a water-side heat exchanger, an air-side heat exchanger, a first temperature sensor, a second temperature sensor, and a water volume control unit. The compressor is used to compress refrigerant, the water-side heat exchanger is used to exchange heat between the refrigerant and water, the air-side heat exchanger is used to exchange heat between the refrigerant and air, and the water volume control unit is used to regulate the water inlet flow of the water-side heat exchanger. The method includes:

[0005] The temperature of the coil corresponding to the air-side heat exchanger is collected by the first temperature sensor.

[0006] The outlet water temperature of the water-side heat exchange device is collected by the second temperature sensor.

[0007] When the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, the compressor is controlled to perform a frequency adjustment operation and the water volume control unit is controlled to perform a water volume adjustment operation based on the coil temperature and the outlet water temperature, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature range.

[0008] In this embodiment, the air conditioner collects the coil temperature of the air-side heat exchanger via a first temperature sensor and the outlet water temperature of the water-side heat exchanger via a second temperature sensor. When the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, it indicates that the surface of the air-side heat exchanger has a certain risk of icing. Based on the coil temperature and outlet water temperature, the compressor is controlled to perform frequency adjustment and the water flow control unit is controlled to perform water flow adjustment. By adjusting the compressor frequency and the water flow rate to the water-side heat exchanger, the coil temperature can be increased, thereby effectively reducing the risk of icing on the surface of the air conditioner's heat exchanger and bringing the outlet water temperature of the water-side heat exchanger closer to the target outlet water temperature range. This meets the user's hot water needs and improves the stability of the air conditioner's operation.

[0009] As an optional implementation, controlling the compressor to perform frequency regulation and controlling the water volume control unit to perform water volume regulation based on the coil temperature and the outlet water temperature includes:

[0010] Determine the first outlet water temperature range in which the outlet water temperature falls;

[0011] Based on the coil temperature and the first outlet water temperature range, the compressor is controlled to perform frequency adjustment operation and the water volume control unit is controlled to perform water volume adjustment operation.

[0012] In this embodiment, the first outlet water temperature range of the water-side heat exchanger can be determined, and the compressor can be controlled to perform frequency regulation operation and the water volume control unit can be controlled to perform water volume regulation operation based on the coil temperature and the first outlet water temperature range. This can further improve the accuracy of the control of the compressor frequency and the water inlet volume of the water-side heat exchanger, and achieve more accurate coil temperature and outlet water temperature regulation.

[0013] As an optional implementation, controlling the compressor to perform frequency regulation and controlling the water volume control unit to perform water volume regulation based on the coil temperature and the first outlet water temperature range includes:

[0014] If the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the compressor is controlled to perform a first frequency adjustment operation and the water volume control unit is controlled to perform a first water volume adjustment operation according to the first outlet water temperature range.

[0015] When the coil temperature is greater than the third temperature threshold and less than or equal to the second temperature threshold, the compressor is controlled to perform a second frequency adjustment operation and the water volume control unit is controlled to perform a second water volume adjustment operation according to the first outlet water temperature range.

[0016] Wherein, the first frequency adjustment operation is different from the second frequency adjustment operation, and / or the first water volume adjustment operation is different from the second water volume adjustment operation.

[0017] In this implementation, different control strategies can be adopted to control the compressor frequency and the water inlet of the water-side heat exchanger for medium and low icing risks. This allows for more accurate control of the compressor frequency and the water inlet of the water-side heat exchanger, reducing the risk of icing while also meeting the user's hot water needs, making the cold air and hot water output by the air conditioner more comfortable and stable.

[0018] As an optional implementation, the target outlet water temperature range belongs to a sub-range that is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold.

[0019] When the first outlet water temperature range is greater than the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water volume adjustment operation includes prohibiting the increase of the inlet water volume of the water-side heat exchange device.

[0020] When the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water volume adjustment operation includes reducing the inlet water volume of the water-side heat exchange device.

[0021] When the first outlet water temperature range is less than or equal to the fourth temperature threshold, the first frequency adjustment operation includes prohibiting the compressor frequency from increasing, and the first water volume adjustment operation includes reducing the inlet water volume of the water-side heat exchange device.

[0022] In this embodiment, when the risk of icing on the surface of the air-side heat exchanger is at a medium risk, the compressor frequency can be reduced or the water inlet flow of the water-side heat exchanger can be reduced, thereby increasing the coil temperature, reducing the risk of icing, and allowing the outlet water temperature of the water-side heat exchanger to approach the target temperature range, thus meeting the user's hot water needs while reducing the risk of icing.

[0023] As an optional implementation, the target outlet water temperature range belongs to a sub-range that is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold.

[0024] When the first outlet water temperature range is greater than the fifth temperature threshold, the second frequency adjustment operation includes reducing the frequency of the compressor, and the second water volume adjustment operation includes preventing the water inlet volume of the water-side heat exchange device from decreasing.

[0025] When the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the second frequency adjustment operation includes prohibiting the compressor frequency from increasing, and the second water volume adjustment operation includes reducing the inlet water volume of the water-side heat exchange device.

[0026] When the first outlet water temperature range is less than or equal to the fourth temperature threshold, the second frequency adjustment operation includes prohibiting the compressor frequency from decreasing, and the second water flow adjustment operation includes reducing the inlet water flow of the water-side heat exchange device.

[0027] In this embodiment, when the risk of icing on the surface of the air-side heat exchanger is low, by controlling the compressor frequency and preventing the water inlet flow of the water-side heat exchanger from being reduced or decreased, the outlet water temperature of the water-side heat exchanger can be made to approach the target temperature range, thereby reducing the risk of icing while meeting the user's need for hot water.

[0028] As an optional implementation, the method further includes:

[0029] If the coil temperature is less than or equal to the first temperature threshold, the compressor is controlled to stop operating.

[0030] In this embodiment, when the risk of icing on the surface of the air-side heat exchanger is high, the compressor can be stopped, thereby rapidly increasing the coil temperature of the air-side heat exchanger and effectively reducing the risk of icing on the surface of the air-side heat exchanger.

[0031] As an optional implementation, after controlling the compressor to perform frequency regulation and controlling the water volume control unit to perform water volume regulation, the method further includes:

[0032] After waiting for the first time period, the steps of collecting the coil temperature of the air-side heat exchanger through the first temperature sensor and collecting the outlet water temperature of the water-side heat exchanger through the second temperature sensor are repeated.

[0033] In this embodiment, after controlling and adjusting the compressor frequency and the water inlet flow rate of the water-side heat exchanger, it is possible to wait for a first period of time, that is, until the coil temperature and the outlet water temperature are relatively stable, before continuing to monitor the coil temperature and the outlet water temperature. This can avoid controlling and adjusting the compressor frequency and the water inlet flow rate of the water-side heat exchanger when the coil temperature and the outlet water temperature are not stable enough, which could lead to inaccurate control. It can also avoid controlling and adjusting the compressor frequency and the water inlet flow rate of the water-side heat exchanger too frequently, thereby reducing unnecessary power consumption loss.

[0034] As an optional implementation, the method further includes:

[0035] If the temperature of the coil corresponding to the air-side heat exchanger is detected to be greater than the second temperature threshold, the freeze protection mode is deactivated, the compressor is controlled to return to the working state before the frequency adjustment operation is performed, and the water volume control unit is controlled to return to the working state before the water volume adjustment operation is performed.

[0036] In this embodiment, the coil temperature corresponding to the air-side heat exchanger can be monitored, and the system can be triggered to enter or exit the freeze protection mode as needed. In the freeze protection mode, the risk of freezing can be reduced by controlling the compressor frequency and / or the water inlet of the water-side heat exchanger. At the same time, the user's hot water needs can also be taken into account, which improves the stability of the air conditioning unit operation.

[0037] As an optional implementation, controlling the compressor to perform frequency regulation and controlling the water volume control unit to perform water volume regulation based on the coil temperature and the outlet water temperature includes:

[0038] The target frequency and target water inflow rate are determined based on the coil temperature and the outlet water temperature.

[0039] The compressor is controlled to adjust its frequency to the target frequency;

[0040] The water volume control unit adjusts the inlet water volume of the water-side heat exchange device to the target inlet water volume.

[0041] In this embodiment, the target frequency required by the compressor and the target water inlet volume required by the water-side heat exchanger can be determined based on the coil temperature and the outlet water temperature. The compressor can be directly controlled to adjust to the target frequency, and the water volume control unit can be controlled to adjust the water inlet volume of the water-side heat exchanger to the target water inlet volume. This improves the control and adjustment efficiency and accelerates the reduction of freezing risk and the adjustment of outlet water temperature.

[0042] As an optional implementation, controlling the compressor to perform frequency regulation and controlling the water volume control unit to perform water volume regulation based on the coil temperature and the outlet water temperature includes:

[0043] The frequency adjustment direction and the water inlet adjustment direction are determined based on the coil temperature and the outlet water temperature.

[0044] The compressor is controlled to adjust its frequency according to a preset frequency step size and the frequency adjustment direction;

[0045] The water volume control unit adjusts the water volume of the water-side heat exchange device according to the preset water volume step size and the water volume adjustment direction.

[0046] In this embodiment, the compressor frequency and the water inlet volume of the water-side heat exchanger can be controlled and adjusted according to preset frequency step size and preset water inlet volume step size, respectively. This can avoid excessive adjustment of the compressor frequency and / or water inlet volume of the water-side heat exchanger at one time, which would cause obvious changes in the user experience. The gradual adjustment method is more conducive to the user experience.

[0047] As an optional implementation, the water volume control unit includes multiple water volume control valves, each corresponding to a different inlet water volume; based on the coil temperature and the outlet water temperature, the water volume control unit is controlled to perform water volume adjustment operations, including:

[0048] Based on the coil temperature and the outlet water temperature, a target water flow control valve is determined from the plurality of water flow control valves;

[0049] The target water flow control valve is opened, and the other water flow control valves are closed, so that water is transferred to the water-side heat exchange device through the target water flow control valve.

[0050] In this embodiment, the water volume control unit may include multiple water volume control valves, each corresponding to a different inlet water volume. The target water volume control valve can be selected to open and the other water volume control valves can be closed according to the coil temperature and the outlet water temperature. This achieves flexible control of the inlet water volume of the water-side heat exchange device, and the control logic is simpler, which can reduce costs.

[0051] As an optional implementation, the air conditioner further includes a hot water outlet and a drainage device; when the hot water outlet is open, the drainage device is closed, and the water output from the water-side heat exchange device is output through the hot water outlet.

[0052] When the hot water outlet is closed, the drainage device is opened, and the water output from the water-side heat exchange device is discharged through the drainage device.

[0053] In this embodiment, when a user needs hot water, the water output from the water-side heat exchanger can be supplied to the user through the hot water outlet. When the user does not need hot water, the water output from the water-side heat exchanger can be discharged from the unit through the drainage device, thereby satisfying both the user's needs for hot water and the user's needs for not using hot water.

[0054] As an optional implementation, the drainage device is configured to be in a closed state when the pipe pressure of the outlet pipe of the water-side heat exchanger is less than the drainage pressure corresponding to the drainage device; and to be in an open state when the pipe pressure of the outlet pipe of the water-side heat exchanger is greater than the drainage pressure corresponding to the drainage device.

[0055] In this embodiment, a pressure-triggered drainage device is used. The drainage device can automatically close and open according to the pipeline pressure, without the need for an additional controller, making the control method simpler and faster.

[0056] This application discloses an air conditioner, including:

[0057] A compressor is used to compress refrigerant;

[0058] A water-side heat exchanger is used to exchange heat between the refrigerant and the water.

[0059] The air-side heat exchanger is used to exchange heat between the refrigerant and the air.

[0060] A water volume control unit is used to adjust the water inlet volume of the water-side heat exchange device;

[0061] The first temperature sensor is used to collect the coil temperature corresponding to the air-side heat exchange device.

[0062] The second temperature sensor is used to collect the outlet water temperature corresponding to the water-side heat exchange device.

[0063] The controller is used to acquire the coil temperature and the outlet water temperature. When the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, the controller controls the compressor to perform a frequency adjustment operation and controls the water volume control unit to perform a water volume adjustment operation based on the coil temperature and the outlet water temperature, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature range.

[0064] This application discloses an air conditioner antifreeze device, applied to an air conditioner. The air conditioner includes a compressor, a water-side heat exchanger, an air-side heat exchanger, a first temperature sensor, a second temperature sensor, and a water volume control unit. The compressor compresses the refrigerant, the water-side heat exchanger exchanges heat between the refrigerant and water, the air-side heat exchanger exchanges heat between the refrigerant and air, and the water volume control unit regulates the water inlet flow of the water-side heat exchanger. The air conditioner antifreeze device includes:

[0065] The first acquisition module is used to acquire the coil temperature corresponding to the air-side heat exchange device through the first temperature sensor.

[0066] The second acquisition module is used to acquire the outlet water temperature corresponding to the water-side heat exchange device through the second temperature sensor.

[0067] The antifreeze control module is used to control the compressor to perform frequency adjustment operation and control the water volume control unit to perform water volume adjustment operation when the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, based on the coil temperature and the outlet water temperature, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature range.

[0068] This application discloses an air conditioner, including a memory and a processor. The memory stores a computer program, and when the computer program is executed by the processor, the processor causes the processor to implement the method described in any of the above embodiments.

[0069] This application discloses a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the method described in any of the above embodiments. Attached Figure Description

[0070] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0071] Figure 1 This is a schematic diagram of the structure of an air conditioner in related technologies;

[0072] Figure 2A This is a schematic diagram of the air conditioner structure in one embodiment;

[0073] Figure 2B This is a schematic diagram of the air conditioner structure in another embodiment;

[0074] Figure 3 This is a flowchart of an air conditioning antifreeze method in one embodiment;

[0075] Figure 4 A flowchart of an air conditioning antifreeze method in another embodiment;

[0076] Figure 5 This is a flowchart illustrating, in one embodiment, the control of the compressor to perform frequency regulation and the control of the water volume control unit to perform water volume regulation based on the coil temperature and the first outlet water temperature range.

[0077] Figure 6 A flowchart of an air conditioning antifreeze method in another embodiment;

[0078] Figure 7 This is a flowchart illustrating, in one embodiment, controlling the compressor to perform frequency adjustment operation and controlling the water volume control unit to perform water volume adjustment operation based on the coil temperature and the outlet water temperature.

[0079] Figure 8 This is a flowchart illustrating, in another embodiment, the control of the compressor to perform frequency regulation operation and the control of the water volume control unit to perform water volume regulation operation based on the coil temperature and the outlet water temperature.

[0080] Figure 9 This is a schematic diagram of the air conditioner structure in another embodiment;

[0081] Figure 10 This is a structural block diagram of an air conditioner in one embodiment;

[0082] Figure 11 This is a structural block diagram of an air conditioning antifreeze device in one embodiment;

[0083] Figure 12 This is a schematic diagram of the air conditioner in another embodiment. Detailed Implementation

[0084] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0085] It should be noted that the terms "comprising" and "having," and any variations thereof, in the embodiments and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0086] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first temperature sensor may be referred to as a second temperature sensor, and similarly, a second temperature sensor may be referred to as a first temperature sensor. Both the first temperature sensor and the second temperature sensor are temperature sensors, but they are not the same temperature sensor. The term "multiple" as used in this application refers to two or more. The term "and / or" as used in this application refers to one of the solutions, or any combination of multiple solutions.

[0087] Figure 1 This is a structural diagram of an air conditioner in related technologies. For example... Figure 1 As shown, the air conditioner 100 may include a compressor 110, a water-side heat exchanger 120, and an air-side heat exchanger 130. The compressor 110 may be connected to both the water-side heat exchanger 120 and the air-side heat exchanger 130.

[0088] The compressor 110 can be used to compress refrigerant. Furthermore, the compressor 110 can be used to compress low-temperature, low-pressure refrigerant into high-temperature, high-pressure refrigerant, and then transfer the high-temperature, high-pressure refrigerant to the water-side heat exchanger 120.

[0089] Optionally, the compressor 110 may include, but is not limited to, scroll compressors, rotary compressors, screw compressors, etc.

[0090] The water-side heat exchanger 120 is used to exchange heat between refrigerant and water. Optionally, the water-side heat exchanger 120 can function as a condenser. Cold water is supplied to the water-side heat exchanger 120 through the inlet pipe 122. The cold water absorbs heat from the high-temperature refrigerant in the water-side heat exchanger 120, resulting in an increased water temperature at the output of the water-side heat exchanger 120, which is then output through the outlet pipe 124. The refrigerant that releases heat in the water-side heat exchanger 120 is then supplied to the air-side heat exchanger 130.

[0091] Optionally, the air conditioner 100 may further include a throttling device 140, which can be connected to both the water-side heat exchanger 120 and the air-side heat exchanger 130. The throttling device 140 can be used to regulate the flow rate of the refrigerant, thus achieving throttling and pressure reduction. The refrigerant releasing heat in the water-side heat exchanger 120 can be converted into a low-temperature, low-pressure refrigerant after passing through the throttling device 140.

[0092] Optionally, the throttling device 140 may include, but is not limited to, an electronic expansion valve, a thermal expansion valve, etc.

[0093] The air-side heat exchanger 130 is used to exchange heat between the refrigerant and the air. Furthermore, the air-side heat exchanger 130 can also function as an evaporator. After the low-temperature, low-pressure refrigerant is delivered to the air-side heat exchanger 130, it absorbs heat from the air and is then returned to the compressor 110. The air temperature inside the air-side heat exchanger 130 is reduced, and the air becomes cold air and is delivered to the room.

[0094] Compressor 110 compresses low-temperature, low-pressure gaseous refrigerant into high-temperature, high-pressure gaseous refrigerant, which is then transported to water-side heat exchanger 120. The high-temperature, high-pressure gaseous refrigerant releases heat through water-side heat exchanger 120 and then passes through throttling device 140 to become low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant is then transported to air-side heat exchanger 130, where it absorbs heat from the air, becoming low-temperature, low-pressure gaseous refrigerant again, which then returns to compressor 110.

[0095] The water-side heat exchanger 120 of the air conditioner 100 can output hot water, and the air-side heat exchanger 130 can output cold air, thus providing both cold air and hot water to meet the user's needs.

[0096] When the temperature of the chilled water entering the water-side heat exchanger 120 is low, due to the high heat exchange efficiency of the water-side heat exchanger 120, the evaporation pressure and temperature of the refrigerant circulation system become too low (e.g., below 0°C). This causes condensation to form on the surface of the air-side heat exchanger 130 as the air cools. As the amount of icing increases, the contact area between the air-side heat exchanger 130 and the air decreases, reducing the heat absorbed by the refrigerant from the air. This results in incomplete refrigerant evaporation, and the overall temperature of the refrigerant circulation system gradually decreases.

[0097] If ice forms on the surface of the air-side heat exchanger 130, it may cause the following problems:

[0098] 1. If ice forms on the surface of the air-side heat exchanger 130, ice crystals may be blown out by the wind, affecting the user experience.

[0099] 2. The amount of heat absorbed by the refrigerant from the air in the air-side heat exchanger 130 is reduced, which decreases the heat exchange efficiency of the air-side heat exchanger 130.

[0100] 3. Incomplete refrigerant evaporation in the air-side heat exchanger 130 may cause liquid refrigerant to enter the compressor, resulting in compressor failure or malfunction. This will prevent the air conditioner 100 from outputting cold air and hot water normally, seriously affecting the normal use of the air conditioner 100.

[0101] 4. When the overall temperature and / or pressure of the refrigerant circulation system is too low, the water-side heat exchanger 120 absorbs insufficient heat from the water, and the output water temperature cannot meet the user's hot water needs.

[0102] Traditional air conditioners typically achieve antifreeze protection directly through compressor regulation, without considering the user's need for hot water. Therefore, reducing the risk of icing on the heat exchanger surface of the air conditioner and enabling it to output hot water to meet the user's needs has become an urgent technical problem to be solved.

[0103] In this application embodiment, an air conditioning antifreeze method and device, an air conditioner, and a storage medium are provided, which can effectively reduce the risk of icing on the surface of the air conditioner's heat exchanger, meet the user's need for hot water, and improve the stability of the air conditioner's operation.

[0104] Figure 2A This is a schematic diagram of the air conditioner structure in one embodiment. For example... Figure 2A As shown, the air conditioner 100 may include a compressor 110, a water-side heat exchanger 120, an air-side heat exchanger 130, a first temperature sensor 150, a second temperature sensor 160, and a water volume control unit 170. Among them,

[0105] Compressor 110 can be used to compress refrigerant.

[0106] The water-side heat exchanger 120 can be used to exchange heat between the refrigerant and water.

[0107] The air-side heat exchanger 130 can be used to exchange heat between the refrigerant and the air.

[0108] Optionally, the air conditioner 100 may also include a throttling device 140.

[0109] For a description of the compressor 110, water-side heat exchanger 120, throttling device 140, and air-side heat exchanger 130, please refer to the above. Figure 1 The relevant descriptions in the document will not be repeated here.

[0110] A water volume control unit 170 can be installed on the inlet pipe 122 of the water-side heat exchanger 120. The water volume control unit 170 can be used to control the water volume entering the water-side heat exchanger 120. Optionally, the water volume control unit 170 may include, but is not limited to, a water volume control valve (such as a solenoid valve).

[0111] The first temperature sensor 150 can be installed on the coil of the air-side heat exchanger 130. The first temperature sensor 150 can be used to collect the coil temperature of the air-side heat exchanger 130.

[0112] The second temperature sensor 160 can be installed on the outlet pipe 124 of the water-side heat exchanger 120. The second temperature sensor 160 can be used to collect the outlet water temperature of the water-side heat exchanger 120.

[0113] Furthermore, the air conditioner 100 may also include a controller (not shown), which can be used to control the operation of the air conditioner 100. The controller can be connected to the compressor 110, the first temperature sensor 150, the second temperature sensor 160, and the water volume control unit 170, respectively.

[0114] For a refrigerant circulation system, when the state of the throttling device 140 is constant, if the frequency of the compressor 110 is higher, the temperature of the refrigerant input to the water-side heat exchanger 120 is higher, and the refrigerant flow rate is faster. Therefore, the water in the water-side heat exchanger 120 absorbs more heat from the refrigerant, the outlet water temperature of the water-side heat exchanger 120 is higher, the temperature and pressure of the refrigerant after passing through the throttling device 140 are lower, the evaporation temperature of the system is lower, resulting in a lower surface temperature of the air-side heat exchanger 130 and a higher risk of icing.

[0115] When the state of the throttling device 140 is constant, if the water flow rate of the water-side heat exchanger 120 is larger, the heat exchange efficiency of the water-side heat exchanger 120 is higher, the refrigerant transfers more heat to the water in the water-side heat exchanger 120, the temperature of the refrigerant after passing through the throttling device 140 is lower, the evaporation temperature of the system is lower, resulting in a lower surface temperature of the air-side heat exchanger 130 and a higher risk of icing.

[0116] In other words, as the frequency of compressor 110 increases, the risk of icing on the surface of air-side heat exchanger 130 increases, and the outlet water temperature of water-side heat exchanger 120 increases; as the frequency of compressor 110 decreases, the risk of icing on the surface of air-side heat exchanger 130 decreases, and the outlet water temperature of water-side heat exchanger 120 decreases.

[0117] When the inlet water flow of the water-side heat exchanger 120 increases, the risk of icing on the surface of the air-side heat exchanger 130 increases, and the outlet water temperature of the water-side heat exchanger 120 decreases; when the inlet water flow of the water-side heat exchanger 120 decreases, the risk of icing on the surface of the air-side heat exchanger 130 decreases, and the outlet water temperature of the water-side heat exchanger 120 increases.

[0118] For example, the effects of the frequency of the compressor 110 and the water inlet flow rate of the water-side heat exchanger 120 on the risk of icing on the surface of the air-side heat exchanger 130 and the outlet water temperature of the water-side heat exchanger 120 can be shown in Table 1.

[0119] Table 1

[0120] Icing risk water outlet temperature The compressor frequency increases rise rise compressor frequency reduced reduce reduce Increased inlet water flow rate of water-side heat exchanger rise reduce Reduced inlet water flow of water-side heat exchanger reduce rise

[0121] Based on the frequency of the compressor 110 and the water inlet flow of the water-side heat exchanger 120, the risk of icing on the surface of the air-side heat exchanger 130 and the influence of the outlet water temperature of the water-side heat exchanger 120 can be mitigated by adjusting the frequency of the compressor 110 and the water inlet flow of the water-side heat exchanger 120. This will achieve anti-freeze protection for the unit, reduce the risk of icing on the surface of the air-side heat exchanger 130, and simultaneously ensure the output hot water temperature of the water-side heat exchanger 120.

[0122] In this embodiment, the controller can acquire the coil temperature collected by the first temperature sensor 150 and the outlet water temperature collected by the second temperature sensor 160. When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, the controller can control the compressor 110 to perform frequency regulation and control the water volume control unit 170 to perform water volume regulation based on the coil temperature and the outlet water temperature. This increases the coil temperature of the air-side heat exchanger 130 and makes the outlet water temperature of the water-side heat exchanger 120 tend to the target outlet water temperature range. This effectively reduces the risk of icing on the surface of the air conditioner's heat exchanger, meets the user's need for hot water, and improves the stability of the air conditioner's operation.

[0123] Figure 2B This is a schematic diagram of the air conditioner in another embodiment. Figure 2B As shown, the air conditioner 100 may also include a drainage device 180. The drainage device 180 may be connected to the output terminal of the water-side heat exchange device 120.

[0124] The air conditioner 100 may also include a hot water outlet 190, which may be located at the end of the outlet pipe 124 of the water-side heat exchange device 120. Users may choose to open or close the hot water outlet 190 according to their own needs.

[0125] With the hot water outlet 190 open, the drain device 180 can be closed, and the water output from the water-side heat exchanger 120 is discharged through the hot water outlet 190. When a user needs hot water, the water output from the water-side heat exchanger 120 can be supplied to the user through the hot water outlet 190.

[0126] With the hot water outlet 190 closed, the drain device 180 is opened, allowing water from the water-side heat exchanger 120 to be discharged through the drain device 180. When the user does not require hot water, the water output from the water-side heat exchanger 120 can be discharged from the unit through the drain device 180, thus satisfying both the user's needs for hot water and the user's needs for not using hot water.

[0127] In some embodiments, the drain device 180 may be connected to a controller, which may detect the opening and closing status of the hot water outlet 190 and control the drain device 180 to close or open according to the opening and closing status of the hot water outlet 190.

[0128] In some embodiments, the drainage device 180 is configured to be in a closed state when the pipe pressure of the outlet pipe 124 of the water-side heat exchange device 120 is less than the drainage pressure corresponding to the drainage device 180; and to be in an open state when the pipe pressure of the outlet pipe of the water-side heat exchange device 120 is greater than the drainage pressure corresponding to the drainage device 180.

[0129] Optionally, the drain device 180 can be a pressure-triggered drain device, which may include a pressure switch valve. When the hot water outlet 190 is open, the water output from the water-side heat exchanger 120 can be supplied to the user through the hot water outlet 190. Therefore, the pipe pressure of the outlet pipe 124 of the water-side heat exchanger 120 is relatively low. If the pressure switch valve detects that the pipe pressure of the outlet pipe 124 of the water-side heat exchanger 120 is less than the corresponding drain pressure of the drain device 180, it can be closed, preventing the water output from the water-side heat exchanger 120 from being discharged through the drain device 180.

[0130] With the hot water outlet 190 closed, the water output from the water-side heat exchanger 120 is not discharged through the hot water outlet 190. As the water output from the water-side heat exchanger 120 increases, the pressure in the outlet pipe 124 of the water-side heat exchanger 120 also increases. If the pressure switch valve detects that the pressure in the outlet pipe 124 of the water-side heat exchanger 120 is greater than the corresponding drainage pressure of the drainage device 180, it can be opened, allowing the water output from the water-side heat exchanger 120 to be discharged from the unit through the drainage device 180.

[0131] The pressure-triggered drainage device can automatically close and open according to the pipeline pressure, without the need for an additional controller, making the control method simpler and faster.

[0132] Optionally, the air conditioner 100 may also include a fan 210, which can be used to promote air circulation within the air-side heat exchanger 130.

[0133] It should be noted that, Figure 2A and Figure 2B This is merely an illustrative description of the structure of air conditioner 100 and is not intended to limit the specific structure of air conditioner 100. Air conditioner 100 may include more than […]. Figure 2A and Figure 2B More or fewer structural components.

[0134] like Figure 3 As shown, in one embodiment, an air conditioner antifreeze method is provided, which can be applied to the air conditioner described above. The method may include the following steps:

[0135] Step 310: Collect the coil temperature of the air-side heat exchanger using the first temperature sensor.

[0136] The coil temperature of the air-side heat exchanger refers to the temperature of the coil itself, which characterizes the surface temperature of the air-side heat exchanger. A higher coil temperature indicates a higher surface temperature, meaning there is little or no risk of icing on the surface. Conversely, a lower coil temperature indicates a lower surface temperature, meaning a higher risk of icing on the surface.

[0137] In some embodiments, the controller of the air conditioner can control the first temperature sensor to collect the coil temperature corresponding to the air-side heat exchange device according to a preset time period. After the first temperature sensor collects the coil temperature, it can send the collected coil temperature to the controller.

[0138] The preset time period can be set according to actual needs and is not limited here. For example, a time period of 5 minutes or 10 minutes can be used. The first temperature sensor collects the coil temperature of the air-side heat exchanger every 5 minutes or 10 minutes.

[0139] Since the temperature of the coil corresponding to the air-side heat exchanger will not change significantly in a very short period of time, the first temperature sensor can be controlled to collect the temperature of the coil corresponding to the air-side heat exchanger according to a preset time period, which can avoid unnecessary power consumption loss caused by the first temperature sensor collecting the coil temperature too frequently.

[0140] Step 320: Collect the outlet water temperature corresponding to the water-side heat exchange device through the second temperature sensor.

[0141] The outlet water temperature corresponding to the water-side heat exchanger refers to the temperature of the water output by the water-side heat exchanger.

[0142] In some embodiments, the controller of the air conditioner can also control the second temperature sensor to collect the outlet water temperature corresponding to the water-side heat exchange device according to a preset time period. After the second temperature sensor collects the outlet water temperature, it can send the collected outlet water temperature to the controller.

[0143] Step 330: When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, the compressor is controlled to perform frequency regulation operation and the water volume control unit is controlled to perform water volume regulation operation according to the coil temperature and the outlet water temperature, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature range.

[0144] In some embodiments, a first temperature threshold and a second temperature threshold corresponding to the coil temperature can be pre-configured, wherein the first temperature threshold may be less than the second temperature threshold. Further, the second temperature threshold may be a temperature value used to determine whether there is a risk of icing on the surface of the wind-side heat exchanger, and the first temperature threshold may be a temperature value used to determine whether the risk of icing on the surface of the wind-side heat exchanger is very high.

[0145] Optionally, the first temperature threshold and the second temperature threshold can be set according to actual needs. For example, the first temperature threshold can be 0°C or a temperature value close to 0°C; the second temperature threshold can be a larger temperature value such as 9°C, 10°C, or 12°C, but is not limited to these.

[0146] The air conditioner controller can compare the coil temperature collected by the first temperature sensor with a first temperature threshold to determine whether the coil temperature is greater than the first temperature threshold. If the coil temperature collected by the first temperature sensor is less than or equal to the first temperature threshold, it indicates that the surface temperature of the air-side heat exchanger is very low, and it can be determined that there is a high risk of icing on the surface of the air-side heat exchanger.

[0147] The air conditioner controller can compare the coil temperature collected by the first temperature sensor with a second temperature threshold to determine whether the coil temperature is greater than the second temperature threshold. If the coil temperature collected by the first temperature sensor is greater than the second temperature threshold, it indicates that the surface temperature of the air-side heat exchanger is high, and it can be determined that there is no risk of icing on the surface of the air-side heat exchanger.

[0148] If the coil temperature collected by the first temperature sensor is greater than the first temperature threshold and less than or equal to the second temperature threshold, it indicates that the surface temperature of the air-side heat exchanger is not particularly low, but it is not high either. Therefore, it can be determined that there is a certain risk of icing on the surface of the air-side heat exchanger. For example, it can be determined that there is a low or medium risk of icing on the surface of the air-side heat exchanger.

[0149] It should be noted that the controller can first compare the coil temperature collected by the first temperature sensor with the first temperature threshold, and then compare the coil temperature collected by the first temperature sensor with the second temperature threshold; or it can first compare the coil temperature collected by the first temperature sensor with the second temperature threshold, and then compare the coil temperature collected by the first temperature sensor with the first temperature threshold, or the two can be compared simultaneously. The timing relationship of the temperature comparison is not limited here.

[0150] When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, there is a certain risk of icing on the surface of the air-side heat exchanger, but the risk of icing is not particularly high. The controller can then control the compressor to perform frequency regulation and control the water volume control unit to perform water volume regulation based on the coil temperature collected by the first temperature sensor and the outlet water temperature collected by the second temperature sensor.

[0151] Frequency regulation operation refers to the operation of controlling the frequency of the compressor. Frequency regulation operation can include, but is not limited to, any of the following operations: increasing the compressor frequency, decreasing the compressor frequency, preventing the compressor frequency from increasing, and preventing the compressor frequency from increasing.

[0152] Water flow regulation operation refers to the operation of controlling the inlet water flow of the water-side heat exchanger. Water flow regulation operation may include, but is not limited to, any of the following operations: reducing the inlet water flow of the water-side heat exchanger, increasing the inlet water flow of the water-side heat exchanger, preventing the decrease of the inlet water flow of the water-side heat exchanger, and preventing the increase of the inlet water flow of the water-side heat exchanger.

[0153] Furthermore, the controller can generate a first control command and a second control command based on the coil temperature and the outlet water temperature, and send the first control command to the compressor and the second control command to the water flow control unit. The compressor can perform frequency adjustment operation according to the first control command. The water flow control unit can perform water flow adjustment operation according to the second control command.

[0154] Based on the compressor frequency and water inlet flow rate of the water-side heat exchanger shown in Table 1, the impact on the icing risk of the air-side heat exchanger surface and the outlet water temperature of the water-side heat exchanger can be assessed. By controlling the compressor frequency and the water inlet flow rate of the water-side heat exchanger, the coil temperature can be increased, thereby reducing the icing risk of the heat exchanger surface. The outlet water temperature of the water-side heat exchanger can also be adjusted to bring it closer to the target outlet water temperature range.

[0155] The target outlet water temperature range can refer to the hot water temperature range that is more suitable for users, such as 35℃~42℃, 38℃~40℃, etc., but is not limited to this.

[0156] "Turning the outlet water temperature towards the target outlet water temperature range" means making the outlet water temperature closer to the target outlet water temperature range; ideally, the outlet water temperature should be within the target outlet water temperature range. If the outlet water temperature is higher than the target outlet water temperature range (i.e., the outlet water temperature is greater than the maximum temperature within the target outlet water temperature range), the outlet water temperature can be lowered to bring it closer to the target outlet water temperature range. If the outlet water temperature is lower than the target outlet water temperature range (i.e., the outlet water temperature is lower than the minimum temperature within the target outlet water temperature range), the outlet water temperature can be raised to bring it closer to the target outlet water temperature range. If the outlet water temperature is within the target outlet water temperature range, the outlet water temperature can be maintained unchanged or slightly increased or decreased to continue keeping the outlet water temperature within the target outlet water temperature range.

[0157] For example, when the coil temperature is low and the risk of icing is high, the compressor frequency can be reduced and the water inlet flow of the water-side heat exchanger can be reduced, thereby increasing the coil temperature and reducing the risk of icing on the surface of the heat exchanger.

[0158] For example, when the coil temperature is low and the risk of freezing is high, if the outlet water temperature of the water-side heat exchanger is higher than the target outlet water temperature range, the compressor frequency can be reduced and the water inlet flow of the water-side heat exchanger can be prohibited from increasing. This can increase the coil temperature while reducing the outlet water temperature, so that the outlet water temperature tends to the target outlet water temperature range.

[0159] In this embodiment, the air conditioner collects the coil temperature of the air-side heat exchanger via a first temperature sensor and the outlet water temperature of the water-side heat exchanger via a second temperature sensor. When the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, it indicates that the surface of the air-side heat exchanger has a certain risk of icing. Based on the coil temperature and the outlet water temperature, the compressor is controlled to perform frequency adjustment and the water volume control unit is controlled to perform water volume adjustment. By adjusting the compressor frequency and the water inlet flow of the water-side heat exchanger, the coil temperature can be increased, thereby effectively reducing the risk of icing on the surface of the air conditioner's heat exchanger and bringing the outlet water temperature of the water-side heat exchanger closer to the target outlet water temperature range. This meets the user's hot water needs and improves the stability of the air conditioner's operation.

[0160] like Figure 4 As shown, in another embodiment, an air conditioner antifreeze method is provided, which may include the following steps:

[0161] Step 402: Collect the coil temperature of the air-side heat exchanger using the first temperature sensor.

[0162] Step 404: Collect the outlet water temperature corresponding to the water-side heat exchange device through the second temperature sensor.

[0163] The descriptions of steps 402 to 404 can be found in the descriptions of steps 310 to 320 in the above embodiments, and will not be repeated here.

[0164] Step 406: When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, determine the first outlet water temperature range.

[0165] In some embodiments, multiple outlet water temperature ranges can be pre-configured, and different outlet water temperature ranges can be used to characterize the temperature of the water output by the water-side heat exchanger. For example, a high water temperature range, a medium water temperature range, and a low water temperature range can be pre-configured. The high water temperature range can be greater than 48°C, the medium water temperature range can be 32°C to 48°C, and the low water temperature range can be less than 32°C. Alternatively, the high water temperature range can be greater than 45°C, the medium water temperature range can be 35°C to 45°C, and the low water temperature range can be less than 35°C, etc., but are not limited to these. Each outlet water temperature range can be flexibly configured according to actual needs.

[0166] If the coil temperature is greater than the first temperature threshold but less than or equal to the second temperature threshold, it indicates a certain risk of icing on the surface of the air-side heat exchanger. However, the risk is not particularly high. Therefore, the outlet water temperature of the water-side heat exchanger can be considered simultaneously to meet the user's hot water needs. The first outlet water temperature range of the water-side heat exchanger can be determined, and based on the coil temperature and this first outlet water temperature range, the compressor frequency and the water inlet flow rate of the water-side heat exchanger can be controlled and adjusted to reduce the risk of icing while meeting the user's hot water needs.

[0167] Optionally, multiple temperature thresholds corresponding to the outlet water temperature can be pre-configured. Taking three outlet water temperature ranges as an example, a fourth temperature threshold and a fifth temperature threshold corresponding to the outlet water temperature can be pre-configured. The fourth temperature threshold is less than the fifth temperature threshold. Further, the fourth temperature threshold can be a temperature value used to determine whether the outlet water temperature of the water-side heat exchanger is too low, and the fifth temperature threshold can be a temperature value used to determine whether the outlet water temperature of the water-side heat exchanger is too high. The first temperature range can be less than or equal to the fourth temperature threshold, the second temperature range can be greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the third temperature range can be greater than the fifth temperature threshold, etc., but not limited to these.

[0168] The air conditioner controller can compare the current outlet water temperature of the water-side heat exchanger with multiple pre-configured temperature thresholds and determine the first outlet water temperature range. For example, if the current outlet water temperature of the water-side heat exchanger is less than or equal to the fourth temperature threshold, the first outlet water temperature range is the first temperature range; if the current outlet water temperature of the water-side heat exchanger is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the first outlet water temperature range is the second temperature range; if the current outlet water temperature of the water-side heat exchanger is greater than the fifth temperature threshold, the first outlet water temperature range is the third temperature range, and so on, but not limited to these.

[0169] It should be noted that the specific temperature values ​​and number of multiple temperature thresholds can be set according to actual needs, and are not limited here.

[0170] Step 408: Based on the coil temperature and the first outlet water temperature range, control the compressor to perform frequency adjustment operation and control the water volume control unit to perform water volume adjustment operation, so as to increase the coil temperature and make the outlet water temperature approach the target outlet water temperature range.

[0171] The relationship between the first outlet water temperature range of the water-side heat exchanger and the target outlet water temperature range can be determined. Based on this relationship and the coil temperature, the compressor is controlled to perform frequency regulation operation and the water volume control unit is controlled to perform water volume regulation operation.

[0172] The relationship between the first outlet temperature range of the water-side heat exchanger and the target outlet temperature range may be that the first outlet temperature range does not include the target outlet temperature range but is greater than the target outlet temperature range. This indicates that the outlet temperature of the water-side heat exchanger is too high and needs to be reduced.

[0173] The relationship between the first outlet temperature range of the water-side heat exchanger and the target outlet temperature range may be that the first outlet temperature range does not include the target outlet temperature range and is less than the target outlet temperature range. In this case, it indicates that the outlet temperature of the water-side heat exchanger is too low and needs to be increased.

[0174] The relationship between the first outlet temperature range of the water-side heat exchanger and the target outlet temperature range may also be that the first outlet temperature range includes the target outlet temperature. In this case, the outlet temperature of the water-side heat exchanger is close to the target outlet temperature range, so the outlet temperature does not need to be adjusted or only slightly adjusted.

[0175] In some embodiments, such as Figure 5As shown, the steps include controlling the compressor to perform frequency adjustment operation and controlling the water volume control unit to perform water volume adjustment operation based on the coil temperature and the first outlet water temperature range, and may include steps 502 to 504.

[0176] Step 502: If the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the compressor is controlled to perform the first frequency adjustment operation and the water volume control unit is controlled to perform the first water volume adjustment operation according to the first outlet water temperature range.

[0177] Step 504: When the coil temperature is greater than the third temperature threshold and less than or equal to the second temperature threshold, the compressor is controlled to perform a second frequency adjustment operation and the water volume control unit is controlled to perform a second water volume adjustment operation according to the first outlet water temperature range.

[0178] In some embodiments, to achieve more precise antifreeze protection and water temperature regulation, the risk of icing on the surface of the air-side heat exchanger can be divided into four risk levels. Furthermore, in addition to the pre-configured first and second temperature thresholds corresponding to the coil temperature, a third temperature threshold corresponding to the coil temperature can also be configured. This third temperature threshold can be greater than the first temperature threshold and less than the second temperature threshold.

[0179] Specifically, if the coil temperature of the air-side heat exchanger is less than or equal to the first temperature threshold, the risk of icing on the surface of the air-side heat exchanger can be considered high; if the coil temperature of the air-side heat exchanger is greater than the first temperature threshold and less than or equal to the third temperature threshold, the risk of icing on the surface of the air-side heat exchanger can be considered medium; if the coil temperature of the air-side heat exchanger is greater than the third temperature threshold and less than or equal to the second temperature threshold, the risk of icing on the surface of the air-side heat exchanger can be considered low; and if the coil temperature of the air-side heat exchanger is greater than the second temperature threshold, the risk of icing on the surface of the air-side heat exchanger can be considered no.

[0180] Different control strategies can be adopted to address different levels of icing risk, including controlling and adjusting the compressor frequency and the water inlet flow of the water-side heat exchanger.

[0181] When the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the risk of icing on the surface of the air-side heat exchanger is medium risk, and the first control strategy can be adopted; when the coil temperature is greater than the third temperature threshold and less than or equal to the second temperature threshold, the risk of icing on the surface of the air-side heat exchanger is low risk, and the second control strategy can be adopted.

[0182] The first control strategy differs from the second control strategy. Furthermore, within the same temperature range of the outlet water temperature, the first and second control strategies employ at least one different approach: different frequency adjustment operations and different water flow adjustment operations.

[0183] When the coil temperature is greater than a first temperature threshold and less than or equal to a third temperature threshold, the controller can, based on the first outlet water temperature range of the water-side heat exchanger, control the compressor to perform a first frequency regulation operation and control the water flow control unit to perform a first water flow regulation operation. When the coil temperature is greater than the third temperature threshold and less than or equal to a second temperature threshold, the controller controls the compressor to perform a second frequency regulation operation and controls the water flow control unit to perform a second water flow regulation operation. The first frequency regulation operation differs from the second frequency regulation operation, and / or the first water flow regulation operation differs from the second water flow regulation operation.

[0184] As an optional implementation, the target outlet water temperature range may be a sub-range that is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold. That is, the target outlet water temperature range may be greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, or it may be a sub-range between the fourth temperature threshold and the fifth temperature threshold.

[0185] Optionally, if the first outlet water temperature range is greater than the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water flow adjustment operation includes prohibiting the increase of the inlet water flow of the water-side heat exchanger.

[0186] The aforementioned first control strategy may include controlling the compressor to reduce its frequency and controlling the water volume control unit to prevent the water inlet flow of the water-side heat exchanger from increasing when the first outlet water temperature range is greater than the fifth temperature threshold.

[0187] When the coil temperature is greater than the first temperature threshold but less than or equal to the third temperature threshold, the risk of icing on the surface of the air-side heat exchanger is medium. If the first outlet water temperature range is greater than the fifth temperature threshold, it indicates a high outlet water temperature, posing a risk of scalding to the user. Therefore, the controller can reduce the compressor frequency and control the water flow control unit to prevent an increase in the water inlet flow to the water-side heat exchanger. This avoids increasing the icing risk by increasing the water inlet flow. Furthermore, because the compressor frequency is reduced and the water inlet flow to the water-side heat exchanger is not increased, less heat is released by the refrigerant within the compressor, allowing the inner coil temperature to rise, reducing the icing risk, and lowering the outlet water temperature to meet the user's hot water needs.

[0188] Optionally, when the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water flow adjustment operation includes reducing the inlet water flow of the water-side heat exchanger.

[0189] The aforementioned first control strategy may include controlling the compressor to reduce its frequency and controlling the water volume control unit to reduce the inlet water volume of the water-side heat exchange device when the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold.

[0190] When the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the risk of icing on the surface of the air-side heat exchanger is medium. The first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, indicating that the outlet water temperature is close to or within the target temperature range, suitable for user use. Therefore, the controller can control the compressor to reduce its frequency and control the water flow control unit to reduce the water inlet flow to the water-side heat exchanger. The reduced compressor frequency increases the inner coil temperature, lowering the risk of icing, while the reduced water inlet flow keeps the outlet water temperature essentially constant or with only minor fluctuations, meeting the user's hot water needs.

[0191] Optionally, if the first outlet water temperature range is less than or equal to the fourth temperature threshold, the first frequency regulation operation includes prohibiting the compressor frequency from increasing, and the first water flow regulation operation includes reducing the inlet water flow of the water-side heat exchanger.

[0192] The aforementioned first control strategy may include controlling the compressor to prevent the compressor frequency from increasing when the first outlet water temperature range is less than or equal to the fourth temperature threshold, and controlling the water volume control unit to reduce the water inlet flow of the water-side heat exchange device.

[0193] When the coil temperature is greater than the first temperature threshold but less than or equal to the third temperature threshold, the risk of icing on the surface of the air-side heat exchanger is medium. The first outlet water temperature range is less than or equal to the fourth temperature threshold, indicating that the outlet water temperature is too low to meet the user's hot water needs. Therefore, the controller can prevent the compressor from increasing its frequency and control the water flow control unit to reduce the water inlet flow to the water-side heat exchanger. Because the water inlet flow is reduced, less heat is released by the refrigerant in the compressor, which increases the inner coil temperature, lowers the risk of icing, and raises the outlet water temperature. This avoids increasing the compressor frequency and thus increasing the risk of icing while still meeting the user's hot water needs.

[0194] In the above embodiments, under the condition of medium risk of icing on the surface of the air-side heat exchanger, the compressor frequency can be reduced or the water inlet flow of the water-side heat exchanger can be reduced, thereby increasing the coil temperature, reducing the risk of icing, and allowing the outlet water temperature of the water-side heat exchanger to approach the target temperature range, thus meeting the user's hot water needs while reducing the risk of icing.

[0195] In some embodiments, where the risk of icing on the surface of the air-side heat exchanger is low, the outlet water temperature of the water-side heat exchanger can be adjusted to be closer to the target temperature range when adjusting the compressor frequency and the inlet water flow of the water-side heat exchanger, in order to meet the user's hot water needs.

[0196] Optionally, if the first outlet water temperature range is greater than the fifth temperature threshold, the second frequency adjustment operation includes reducing the compressor frequency, and the second water flow adjustment operation includes prohibiting the reduction of the inlet water flow of the water-side heat exchanger.

[0197] The second control strategy mentioned above may include controlling the compressor to reduce its frequency and controlling the water volume control unit to prevent the water inlet volume of the water-side heat exchanger from decreasing when the first outlet water temperature range is greater than the fifth temperature threshold.

[0198] When the coil temperature is greater than the third temperature threshold but less than or equal to the second temperature threshold, the risk of icing on the surface of the air-side heat exchanger is low. If the first outlet water temperature range is greater than the fifth temperature threshold, it indicates a high outlet water temperature, posing a risk of scalding to the user. Therefore, the controller can reduce the compressor frequency and control the water flow control unit to prevent a decrease in the inlet water flow to the water-side heat exchanger. This avoids a rise in outlet water temperature due to reduced inlet water flow. Furthermore, the reduced compressor frequency allows for a slight increase in the inner coil temperature, reducing the risk of icing and lowering the outlet water temperature to meet the user's hot water needs.

[0199] Optionally, if the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the second frequency regulation operation includes prohibiting the compressor frequency from increasing, and the second water flow regulation operation includes reducing the inlet water flow of the water-side heat exchanger.

[0200] The aforementioned second control strategy may include controlling the compressor to prevent the compressor frequency from increasing when the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, and controlling the water volume control unit to reduce the water inlet flow of the water-side heat exchange device.

[0201] When the coil temperature is greater than the third temperature threshold and less than or equal to the second temperature threshold, the risk of icing on the surface of the air-side heat exchanger is low. The first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, indicating that the outlet water temperature is close to or within the target temperature range, suitable for user use. Therefore, the controller can prevent the compressor from increasing its frequency and control the water flow control unit to reduce the water inflow to the water-side heat exchanger. This allows for a proper increase in the inner coil temperature, reducing the risk of icing, conserving water resources, and preventing increased icing risk due to increased compressor frequency. The outlet water temperature remains essentially constant or increases slightly, still meeting the user's hot water needs.

[0202] Optionally, if the first outlet water temperature range is less than or equal to the fourth temperature threshold, the second frequency regulation operation includes prohibiting the compressor frequency from decreasing, and the second water flow regulation operation includes reducing the inlet water flow of the water-side heat exchanger.

[0203] The second control strategy described above may include controlling the compressor to prevent the compressor frequency from decreasing when the first outlet water temperature range is less than or equal to the fourth temperature threshold, and controlling the water volume control unit to reduce the water inlet flow of the water-side heat exchange device.

[0204] When the coil temperature is greater than the third temperature threshold but less than or equal to the second temperature threshold, the risk of icing on the surface of the air-side heat exchanger is low. The first outlet water temperature range is less than or equal to the fourth temperature threshold, indicating that the outlet water temperature is too low to meet the user's hot water needs. Therefore, the controller can prevent the compressor from reducing its frequency, thus avoiding a further decrease in outlet water temperature. It can also control the water flow control unit to reduce the inflow to the water-side heat exchanger, thereby increasing the inner coil temperature and raising the outlet water temperature. This reduces the risk of icing while meeting the user's hot water needs.

[0205] In the above embodiments, when the risk of icing on the surface of the air-side heat exchanger is low, by controlling the compressor frequency and preventing the water inlet flow of the water-side heat exchanger from decreasing or being reduced, the outlet water temperature of the water-side heat exchanger can be made to approach the target temperature range, thereby reducing the risk of icing while meeting the user's need for hot water.

[0206] In this embodiment, the risk of icing on the surface of the air-side heat exchanger can be divided into four risk levels, and the outlet water temperature can be divided into three temperature ranges. For medium and low icing risks, different control strategies can be adopted to control the compressor frequency and the water inlet of the water-side heat exchanger. This allows for more accurate control of the compressor frequency and the water inlet of the water-side heat exchanger, reducing the risk of icing while also meeting the user's hot water needs, making the cold air and hot water output by the air conditioner more comfortable and stable.

[0207] It should be noted that the risk of icing on the surface of the air-side heat exchanger can also be classified into other risk levels, such as 3 risk levels, 5 risk levels, 6 risk levels, etc.; the outlet water temperature of the water-side heat exchanger can also be divided into more temperature ranges, not limited to the above 3 temperature ranges, and can be flexibly adjusted according to actual needs. This application embodiment does not limit this.

[0208] In this embodiment, the first outlet water temperature range of the water-side heat exchanger can be determined, and the compressor can be controlled to perform frequency regulation operation and the water volume control unit can be controlled to perform water volume regulation operation based on the coil temperature and the first outlet water temperature range. This can further improve the accuracy of the control of the compressor frequency and the water inlet volume of the water-side heat exchanger, and achieve more accurate coil temperature and outlet water temperature regulation.

[0209] In some embodiments, the above method may further include: controlling the compressor to stop operating when the coil temperature is less than or equal to a first temperature threshold.

[0210] If the coil temperature of the air-side heat exchanger is less than or equal to the first temperature threshold, it indicates that the coil temperature of the air-side heat exchanger is too low and the risk of icing on the surface of the air-side heat exchanger is high. Therefore, the compressor can be stopped to quickly increase the coil temperature of the air-side heat exchanger and reduce the risk of icing on the surface of the air-side heat exchanger.

[0211] In this embodiment of the application, when the risk of icing on the surface of the air-side heat exchanger is high, the compressor can be stopped, thereby rapidly increasing the coil temperature of the air-side heat exchanger and effectively reducing the risk of icing on the surface of the air-side heat exchanger.

[0212] like Figure 6 As shown, in another embodiment, an air conditioner antifreeze method is provided, which may include the following steps:

[0213] Step 602: Collect the coil temperature of the air-side heat exchanger using the first temperature sensor.

[0214] Step 604: Collect the outlet water temperature corresponding to the water-side heat exchange device through the second temperature sensor.

[0215] Step 606: When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, determine the first outlet water temperature range.

[0216] Step 608: Based on the coil temperature and the first outlet water temperature range, control the compressor to perform frequency adjustment operation and control the water volume control unit to perform water volume adjustment operation, so as to increase the coil temperature and make the outlet water temperature approach the target outlet water temperature range.

[0217] The descriptions of steps 602 to 608 can be found in the relevant descriptions in the above embodiments, and will not be repeated here.

[0218] Step 610: After waiting for the first duration, proceed to step 602.

[0219] When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, after the controller controls the compressor to perform frequency adjustment operation and controls the water volume control unit to perform water volume adjustment operation, it can wait for a first period of time and then re-execute the steps of collecting the coil temperature corresponding to the air-side heat exchanger through the first temperature sensor and collecting the outlet water temperature corresponding to the water-side heat exchanger through the second temperature sensor to continue monitoring the coil temperature and outlet water temperature. If the controller detects a risk of icing in the air-side heat exchanger based on the coil temperature, it will continue to control the compressor to perform frequency adjustment operation and control the water volume control unit to perform water volume adjustment operation.

[0220] Optionally, if the coil temperature is less than or equal to the first temperature threshold, after the controller stops the compressor, it can wait for a first period of time and then re-execute the process of collecting the coil temperature corresponding to the air-side heat exchanger through the first temperature sensor to continue monitoring the coil temperature. If the coil temperature is detected to be greater than the first temperature threshold, the controller can control the compressor to restart.

[0221] The initial duration can be set according to actual needs and is not limited here. For example, the initial duration can be 5 minutes, 3 minutes, 8 minutes, etc., but it is not limited to these.

[0222] In this embodiment, after controlling and adjusting the compressor frequency and the water inlet flow rate of the water-side heat exchanger, it is possible to wait for a first period of time, that is, until the coil temperature and the outlet water temperature are relatively stable, before continuing to monitor the coil temperature and the outlet water temperature. This can avoid controlling and adjusting the compressor frequency and the water inlet flow rate of the water-side heat exchanger when the coil temperature and the outlet water temperature are not stable enough, which could lead to inaccurate control. It can also avoid controlling and adjusting the compressor frequency and the water inlet flow rate of the water-side heat exchanger too frequently, thereby reducing unnecessary power consumption loss.

[0223] Step 612: If the temperature of the coil corresponding to the air-side heat exchanger is detected to be greater than the second temperature threshold, the freeze protection mode is deactivated, the compressor is controlled to return to the working state before the frequency adjustment operation is performed, and the water volume control unit is controlled to return to the working state before the water volume adjustment operation is performed.

[0224] In some embodiments, if the controller detects that the coil temperature corresponding to the air-side heat exchanger is greater than a second temperature threshold, and the system is currently in a freeze protection mode, the freeze protection mode can be deactivated. The freeze protection mode can refer to a mode that reduces the risk of icing by controlling the compressor frequency and / or the water inlet flow rate of the water-side heat exchanger. If the controller detects that the coil temperature corresponding to the air-side heat exchanger is less than or equal to the second temperature threshold, it enters the freeze protection mode. In this mode, the controller can control the compressor to perform frequency regulation and the water flow control unit to perform water flow regulation, or it can control the compressor to stop operating, etc.

[0225] When the freeze protection mode is deactivated, the controller can restore the compressor to its operating state before the frequency adjustment operation and restore the water flow control unit to its operating state before the water flow adjustment operation. For example, if the controller controls the compressor to reduce its frequency in freeze protection mode, then when the freeze protection mode is deactivated, the controller can control the compressor to increase its frequency back to the frequency before the frequency was reduced. Or, for example, if the controller controls the water flow control unit to prevent an increase in the inlet water flow to the water-side heat exchanger in freeze protection mode, then when the freeze protection mode is deactivated, the controller can control the water flow control unit to release the restriction on increasing the inlet water flow to the water-side heat exchanger. The inlet water flow to the water-side heat exchanger can be increased or decreased as needed, but is not limited to these examples.

[0226] In some embodiments, if the controller detects that the coil temperature corresponding to the air-side heat exchanger is greater than the second temperature threshold, and if the unit is not currently in freeze protection mode, the controller may not take any action, and the unit will continue to operate normally.

[0227] In this embodiment, the coil temperature corresponding to the air-side heat exchanger can be monitored, and the system can be triggered to enter or exit the freeze protection mode as needed. In the freeze protection mode, the risk of freezing can be reduced by controlling the compressor frequency and / or the water inlet of the water-side heat exchanger. At the same time, the user's hot water needs can also be taken into account, which improves the stability of the air conditioning unit operation.

[0228] The controller controls the compressor to perform frequency regulation and the water volume control unit to perform water volume regulation; various control methods are possible. In some embodiments, a one-step precise control method can be used. For example... Figure 7As shown, the steps, based on the coil temperature and outlet water temperature, control the compressor to perform frequency regulation and control the water volume control unit to perform water volume regulation, may include the following steps:

[0229] Step 702: Determine the target frequency and target inlet water volume based on the coil temperature and outlet water temperature.

[0230] As one implementation method, the controller can first determine the frequency adjustment operation to be performed by the compressor and the water volume adjustment operation to be performed by the water volume control unit based on the coil temperature and the outlet water temperature. For the specific determination method, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0231] If the required frequency adjustment operation for the compressor is to reduce the compressor frequency, the controller can determine the target frequency based on the coil temperature and the outlet water temperature. For example, the lower the coil temperature, the lower the target frequency can be; the higher the outlet water temperature, the lower the target frequency can be.

[0232] If the required frequency regulation operation of the compressor is to prevent the compressor frequency from increasing or decreasing, then the current frequency of the compressor can be used as the target frequency so that the compressor can maintain the current frequency.

[0233] If the water flow control unit needs to perform a water flow regulation operation to reduce the inlet water flow of the water-side heat exchanger, the controller can determine the target inlet water flow based on the coil temperature and the outlet water temperature. For example, the lower the coil temperature, the lower the target inlet water flow; the lower the outlet water temperature, the lower the target inlet water flow.

[0234] If the water volume control unit needs to perform a water volume adjustment operation that prohibits the increase of the water inlet volume of the water-side heat exchanger or prohibits the decrease of the water inlet volume of the water-side heat exchanger, then the current water inlet volume of the water volume control unit can be used as the target water inlet volume to keep the water inlet volume of the water-side heat exchanger at the current water inlet volume.

[0235] As another implementation method, the target frequency and target water intake can also be determined by an artificial intelligence model. This artificial intelligence model has the function of recommending the optimal compressor frequency and water intake of the water-side heat exchange device, so as to ensure the user's hot water needs while reducing the risk of freezing.

[0236] The coil temperature and outlet water temperature can be input into a pre-trained artificial intelligence model. This model analyzes the coil temperature and outlet water temperature and outputs the target frequency and target water inflow. The target frequency and target water inflow obtained through the artificial intelligence model are more accurate, which can more effectively reduce the risk of freezing while taking into account the user's hot water needs.

[0237] Step 704: Control the compressor to adjust the compressor frequency to the target frequency.

[0238] After determining the target frequency, the controller can generate a first control command based on the target frequency and send the first control command to the compressor to control the compressor to adjust the compressor frequency to the target frequency.

[0239] Optionally, if the required frequency regulation operation of the compressor is to prevent the compressor frequency from increasing or decreasing, the controller may generate a first control command carrying a target frequency and a prohibition on increasing frequency, or may generate a first control command carrying a target frequency and a prohibition on decreasing frequency, to control the compressor to prevent the compressor frequency from increasing or decreasing.

[0240] The "No Raising" and "No Lowering" signs can be two pre-set, distinct signs. The "No Raising" sign indicates that increasing the compressor frequency is prohibited, while the "No Lowering" sign indicates that decreasing the compressor frequency is prohibited. Optionally, the "No Raising" and "No Lowering" signs can consist of one or more of numbers, letters, symbols, etc.

[0241] Step 706: The water volume control unit adjusts the water inlet volume of the water-side heat exchanger to the target water inlet volume.

[0242] After determining the target water inlet volume, the controller can generate a second control command based on the target water inlet volume and send the second control command to the water volume control unit to control the water volume control unit to adjust the water inlet volume of the water-side heat exchange device to the target water inlet volume.

[0243] Optionally, if the water volume control unit performs a water volume adjustment operation that prohibits the increase of the water inlet volume of the water-side heat exchanger or prohibits the decrease of the water inlet volume of the water-side heat exchanger, the controller can generate a second control command carrying a target water inlet volume and a prohibition on increasing the water inlet volume, or it can generate a second control command carrying a target water inlet volume and a prohibition on decreasing the water inlet volume, so as to control the water volume control unit to prohibit increasing or decreasing the water inlet volume of the water-side heat exchanger.

[0244] In this embodiment, the target frequency required by the compressor and the target water inlet volume required by the water-side heat exchanger can be determined based on the coil temperature and the outlet water temperature. The compressor can be directly controlled to adjust to the target frequency, and the water volume control unit can be controlled to adjust the water inlet volume of the water-side heat exchanger to the target water inlet volume. This improves the control and adjustment efficiency and accelerates the reduction of freezing risk and the adjustment of outlet water temperature.

[0245] In some embodiments, a step-by-step adjustment control method can be used to control the compressor frequency and the water inlet flow rate of the water-side heat exchanger. For example... Figure 8As shown, the steps, based on the coil temperature and outlet water temperature, control the compressor to perform frequency regulation and control the water volume control unit to perform water volume regulation, may include the following steps:

[0246] Step 802: Determine the frequency adjustment direction and the inlet water flow adjustment direction based on the coil temperature and the outlet water temperature.

[0247] As one implementation method, the controller can first determine the frequency adjustment operation to be performed by the compressor and the water volume adjustment operation to be performed by the water volume control unit based on the coil temperature and the outlet water temperature. For the specific determination method, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0248] The direction of frequency adjustment can be determined based on the frequency adjustment operation required by the compressor. The direction of frequency adjustment refers to the trend of frequency change in the compressor.

[0249] Optionally, if the required frequency adjustment operation of the compressor is to reduce the compressor frequency, the controller can determine the frequency adjustment direction as frequency reduction; if the required frequency adjustment operation of the compressor is to prevent the compressor frequency from increasing, the controller can determine the frequency adjustment direction as preventing frequency increase; if the required frequency adjustment operation of the compressor is to prevent the compressor frequency from decreasing, the controller can determine the frequency adjustment direction as preventing frequency reduction.

[0250] The direction of water inlet flow adjustment can be determined based on the water flow adjustment operation required by the water flow control unit. The direction of water inlet flow adjustment can refer to the trend of water flow change in the water-side heat exchanger.

[0251] Optionally, if the water flow control unit needs to perform a water flow adjustment operation to increase the inlet water flow of the water-side heat exchanger, the controller can determine the water flow adjustment direction as increasing the inlet water flow; if the water flow control unit needs to perform a water flow adjustment operation to decrease the inlet water flow of the water-side heat exchanger, the controller can determine the water flow adjustment direction as decreasing the inlet water flow; if the water flow control unit needs to perform a water flow adjustment operation to prevent the inlet water flow of the water-side heat exchanger from increasing, the controller can determine the water flow adjustment direction as preventing the inlet water flow from increasing; if the water flow control unit needs to perform a water flow adjustment operation to prevent the inlet water flow of the water-side heat exchanger from decreasing, the controller can determine the water flow adjustment direction as preventing the inlet water flow from decreasing.

[0252] Step 804: Control the compressor to adjust the compressor frequency according to the preset frequency step size and frequency adjustment direction.

[0253] The preset frequency step size can refer to the pre-set adjustable frequency for each step, such as 5Hz (Hertz), 10Hz, 6Hz, etc., but is not limited to this.

[0254] The controller can generate a first control command based on the frequency adjustment direction and the preset frequency step size, and send the first control command to the compressor so that the compressor can adjust the frequency according to the preset frequency step size and frequency adjustment direction.

[0255] For example, if the frequency adjustment direction is to reduce the compressor frequency, the compressor can reduce the preset frequency step size. For example, if the frequency adjustment direction is to prohibit frequency increase or prohibit frequency decrease, the controller can also directly generate a first control command based on the frequency adjustment direction and send the first control command to the compressor to prevent the compressor frequency from increasing or decreasing.

[0256] Step 806: The water volume control unit adjusts the water volume of the water-side heat exchange device according to the preset water volume step size and water volume adjustment direction.

[0257] The preset water inlet step can refer to the pre-set adjustable water inlet flow rate of 0.1 m³ / s (cubic meters per second), 0.5 m³ / s, etc., but is not limited to this.

[0258] The controller can generate a second control command based on the water inlet adjustment direction and the preset water inlet step size, and send the second control command to the water control unit so that the water control unit adjusts the water inlet according to the preset water inlet step size and water inlet adjustment direction.

[0259] For example, if the water flow adjustment direction is to increase the inlet water flow, the water flow control unit can increase the inlet water flow of the water-side heat exchanger by a preset inlet water flow step; if the water flow adjustment direction is to decrease the inlet water flow, the water flow control unit can decrease the inlet water flow of the water-side heat exchanger by a preset inlet water flow step. For example, if the water flow adjustment direction is to prohibit increasing or decreasing the inlet water flow, the controller can also directly generate a second control command based on the water flow adjustment direction and send the second control command to the water flow control unit so that the water flow control unit prohibits increasing or decreasing the inlet water flow of the water-side heat exchanger.

[0260] In this embodiment, the compressor frequency and the water inlet volume of the water-side heat exchanger can be controlled and adjusted according to the preset frequency step size and the preset water inlet volume step size, respectively. This can avoid excessive adjustment of the compressor frequency and / or the water inlet volume of the water-side heat exchanger at one time, which would cause obvious changes in the user experience. The gradual adjustment method is more conducive to the user experience.

[0261] In one implementation, the water control unit may include only one water control valve, and the controller may directly control the water control valve to perform water flow regulation operations, thereby achieving precise control of the inlet water flow of the water-side heat exchange device.

[0262] As another implementation method, such as Figure 9As shown, the water flow control unit 170 may include multiple water flow control valves, which can be connected in parallel. Each of these multiple water flow control valves can correspond to a different inlet water flow rate. The controller can determine a target water flow control valve from among the multiple water flow control valves based on the coil temperature and the outlet water temperature. It can control the target water flow control valve to open and control the other water flow control valves to close, so that water is transferred to the water-side heat exchanger through the target water flow control valve.

[0263] The controller can first determine the water flow regulation operation that the water flow control unit needs to perform based on the coil temperature and the outlet water temperature, and then select the target water flow control valve from multiple water flow control valves based on the required water flow regulation operation. The target water flow control valve is the water flow control valve that needs to be opened corresponding to the required water flow regulation operation.

[0264] For example, taking three water flow control valves, the inlet water flow rate corresponding to water flow control valve A can be less than that corresponding to water flow control valve B, and the inlet water flow rate corresponding to water flow control valve B can be less than that corresponding to water flow control valve C. For instance, if the water flow control unit needs to perform a water flow adjustment operation to increase the inlet water flow of the water-side heat exchanger, and the currently open water flow control valve is water flow control valve B, then the target water flow control valve can be water flow control valve C. If the water flow control unit needs to perform a water flow adjustment operation to decrease the inlet water flow of the water-side heat exchanger, and the currently open water flow control valve is water flow control valve C, then the target water flow control valve can be either water flow control valve B or water flow control valve A. If the water flow control unit needs to perform a water flow regulation operation that prohibits increasing the water flow into the water-side heat exchanger, and the currently open water flow control valve is water flow control valve A, then the target water flow control valve can be water flow control valve A, and water flow control valves B and C are in a non-openable state; if the water flow control unit needs to perform a water flow regulation operation that prohibits decreasing the water flow into the water-side heat exchanger, and the currently open water flow control valve is water flow control valve B, then the target water flow control valve can be water flow control valve B, and water flow control valve A is in a non-openable state.

[0265] After the target water flow control valve is determined, the controller can control the target water flow control valve to open and control the other water flow control valves to close. Water can be transferred to the water-side heat exchange device through the target water flow control valve.

[0266] In this embodiment, the water volume control unit may include multiple water volume control valves, each corresponding to a different inlet water volume. The target water volume control valve can be selected to open and other water volume control valves can be closed according to the coil temperature and outlet water temperature. This achieves flexible control of the inlet water volume of the water-side heat exchange device, and the control logic is simpler, which can reduce costs.

[0267] like Figure 10 As shown, in one embodiment, an air conditioner 100 is provided, which may include:

[0268] Compressor 110 is used to compress refrigerant;

[0269] Water-side heat exchange device 120 is used to exchange heat between refrigerant and water;

[0270] The air-side heat exchanger 130 is used to exchange heat between the refrigerant and the air;

[0271] The water volume control unit 170 is used to regulate the inlet water volume of the water-side heat exchange device;

[0272] The first temperature sensor 150 is used to collect the coil temperature of the air-side heat exchanger.

[0273] The second temperature sensor 160 is used to collect the outlet water temperature corresponding to the water-side heat exchange device.

[0274] The controller 1010 is used to acquire the coil temperature and the outlet water temperature. When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, the controller controls the compressor to perform frequency adjustment operation and controls the water volume control unit to perform water volume adjustment operation to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature range.

[0275] In some embodiments, the controller 1010 is further configured to determine the first outlet water temperature range in which the outlet water temperature is located; and to control the compressor to perform frequency regulation operation and control the water volume control unit to perform water volume regulation operation based on the coil temperature and the first outlet water temperature range.

[0276] In some embodiments, the controller 1010 is further configured to control the compressor to perform a first frequency adjustment operation and control the water volume control unit to perform a first water volume adjustment operation according to the first outlet water temperature range if the coil temperature is greater than a first temperature threshold and less than or equal to a third temperature threshold.

[0277] The controller 1010 is also used to control the compressor to perform a second frequency regulation operation and control the water volume control unit to perform a second water volume regulation operation according to the first outlet water temperature range when the coil temperature is greater than the third temperature threshold and less than or equal to the second temperature threshold.

[0278] Among them, the first frequency adjustment operation is different from the second frequency adjustment operation, and / or the first water volume adjustment operation is different from the second water volume adjustment operation.

[0279] In some embodiments, the target outlet water temperature range belongs to a sub-range that is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold.

[0280] When the first outlet water temperature range is greater than the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water flow adjustment operation includes prohibiting the increase of the inlet water flow of the water-side heat exchange device.

[0281] When the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water flow adjustment operation includes reducing the inlet water flow of the water-side heat exchanger.

[0282] When the first outlet water temperature range is less than or equal to the fourth temperature threshold, the first frequency regulation operation includes prohibiting the compressor frequency from increasing, and the first water flow regulation operation includes reducing the inlet water flow of the water-side heat exchanger.

[0283] In some embodiments, the target outlet water temperature range belongs to a sub-range that is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold.

[0284] When the first outlet water temperature range is greater than the fifth temperature threshold, the second frequency regulation operation includes reducing the compressor frequency, and the second water flow regulation operation includes prohibiting the reduction of the inlet water flow of the water-side heat exchanger.

[0285] When the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the second frequency regulation operation includes prohibiting the compressor frequency from increasing, and the second water flow regulation operation includes reducing the inlet water flow of the water-side heat exchanger.

[0286] When the first outlet water temperature range is less than or equal to the fourth temperature threshold, the second frequency regulation operation includes prohibiting the compressor frequency from decreasing, and the second water flow regulation operation includes reducing the inlet water flow of the water-side heat exchanger.

[0287] In some embodiments, the controller 1010 is also configured to control the compressor to stop operating when the coil temperature is less than or equal to a first temperature threshold.

[0288] In some embodiments, the controller 1010 is further configured to, after controlling the compressor to perform frequency regulation operation and controlling the water volume control unit to perform water volume regulation operation, wait for a first period of time and then reacquire the coil temperature corresponding to the air-side heat exchanger collected by the first temperature sensor and the outlet water temperature corresponding to the water-side heat exchanger collected by the second temperature sensor.

[0289] In some embodiments, the controller 1010 is further configured to, if the temperature of the coil corresponding to the air-side heat exchanger is detected to be greater than the second temperature threshold, release the freeze protection mode, control the compressor to return to the working state before performing the frequency adjustment operation, and control the water volume control unit to return to the working state before performing the water volume adjustment operation.

[0290] In some embodiments, the controller 1010 is further configured to determine a target frequency and a target water inlet volume based on the coil temperature and the outlet water temperature; control the compressor to adjust the compressor frequency to the target frequency; and control the water volume control unit to adjust the water inlet volume of the water-side heat exchanger to the target water inlet volume.

[0291] In some embodiments, the controller 1010 is further configured to determine the frequency adjustment direction and the water inlet adjustment direction based on the coil temperature and the outlet water temperature; control the compressor to adjust the frequency of the compressor according to a preset frequency step and frequency adjustment direction; and control the water volume control unit to adjust the water inlet of the water-side heat exchange device according to a preset water inlet step and water inlet adjustment direction.

[0292] In some embodiments, the water volume control unit includes multiple water volume control valves, each corresponding to a different water inlet volume.

[0293] The controller 1010 is also used to determine the target water flow control valve from multiple water flow control valves based on the coil temperature and the outlet water temperature; control the target water flow control valve to open; and control the other water flow control valves besides the target water flow control valve to close, so that water is transferred to the water-side heat exchanger through the target water flow control valve.

[0294] In some embodiments, the air conditioner 100 may further include a hot water outlet and a drainage device; when the hot water outlet is open, the drainage device is closed, and the water output from the water-side heat exchanger is output through the hot water outlet; when the hot water outlet is closed, the drainage device is open, and the water output from the water-side heat exchanger is output through the drainage device.

[0295] In some embodiments, the drainage device is configured to be in a closed state when the pipe pressure of the outlet pipe of the water-side heat exchanger is less than the drainage pressure corresponding to the drainage device; and to be in an open state when the pipe pressure of the outlet pipe of the water-side heat exchanger is greater than the drainage pressure corresponding to the drainage device.

[0296] It should be noted that the description of the air conditioner provided in the embodiments of this application can be referred to the relevant description of the air conditioner antifreeze method provided in the above embodiments, and will not be repeated here.

[0297] In this embodiment, the air conditioner collects the coil temperature of the air-side heat exchanger via a first temperature sensor and the outlet water temperature of the water-side heat exchanger via a second temperature sensor. When the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, it indicates that the surface of the air-side heat exchanger has a certain risk of icing. The controller can then control the compressor to perform frequency adjustment and the water volume control unit to perform water volume adjustment based on the coil temperature and the outlet water temperature. By adjusting the compressor frequency and the water inlet flow of the water-side heat exchanger, the coil temperature can be increased, thereby effectively reducing the risk of icing on the surface of the air conditioner's heat exchanger and bringing the outlet water temperature of the water-side heat exchanger closer to the target outlet water temperature range. This can meet the user's hot water needs and improve the stability of the air conditioner's operation.

[0298] like Figure 11 As shown, in one embodiment, an air conditioner antifreeze device 1100 is provided, which can be applied to the air conditioner described above. The air conditioner antifreeze device 1100 may include a first acquisition module 1110, a second acquisition module 1120 and an antifreeze control module 1130.

[0299] The first acquisition module 1110 is used to acquire the coil temperature corresponding to the air-side heat exchange device through the first temperature sensor.

[0300] The second acquisition module 1120 is used to acquire the outlet water temperature corresponding to the water-side heat exchange device through the second temperature sensor.

[0301] The antifreeze control module 1130 is used to control the compressor to perform frequency adjustment operation and control the water volume control unit to perform water volume adjustment operation according to the coil temperature and the outlet water temperature when the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature range.

[0302] In some embodiments, the antifreeze control module 1130 includes a range determination unit and a control unit.

[0303] The interval determination unit is used to determine the first outlet water temperature interval in which the outlet water temperature falls.

[0304] The control unit is used to control the compressor to perform frequency adjustment operation and control the water volume control unit to perform water volume adjustment operation based on the coil temperature and the first outlet water temperature range.

[0305] In some embodiments, the control unit is further configured to, if the coil temperature is greater than a first temperature threshold and less than or equal to a third temperature threshold, control the compressor to perform a first frequency adjustment operation and control the water volume control unit to perform a first water volume adjustment operation according to a first outlet water temperature range; and if the coil temperature is greater than a third temperature threshold and less than or equal to a second temperature threshold, control the compressor to perform a second frequency adjustment operation and control the water volume control unit to perform a second water volume adjustment operation according to a first outlet water temperature range; wherein the first frequency adjustment operation is different from the second frequency adjustment operation, and / or the first water volume adjustment operation is different from the second water volume adjustment operation.

[0306] In some embodiments, the target outlet water temperature range belongs to a sub-range that is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold.

[0307] When the first outlet water temperature range is greater than the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water flow adjustment operation includes prohibiting the increase of the inlet water flow of the water-side heat exchange device.

[0308] When the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water flow adjustment operation includes reducing the inlet water flow of the water-side heat exchanger.

[0309] When the first outlet water temperature range is less than or equal to the fourth temperature threshold, the first frequency regulation operation includes prohibiting the compressor frequency from increasing, and the first water flow regulation operation includes reducing the inlet water flow of the water-side heat exchanger.

[0310] In some embodiments, the target outlet water temperature range belongs to a sub-range that is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold.

[0311] When the first outlet water temperature range is greater than the fifth temperature threshold, the second frequency regulation operation includes reducing the compressor frequency, and the second water flow regulation operation includes prohibiting the reduction of the inlet water flow of the water-side heat exchanger.

[0312] When the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the second frequency regulation operation includes prohibiting the compressor frequency from increasing, and the second water flow regulation operation includes reducing the inlet water flow of the water-side heat exchanger.

[0313] When the first outlet water temperature range is less than or equal to the fourth temperature threshold, the second frequency regulation operation includes prohibiting the compressor frequency from decreasing, and the second water flow regulation operation includes reducing the inlet water flow of the water-side heat exchanger.

[0314] In some embodiments, the air conditioning antifreeze device 1100 further includes a stop module.

[0315] The stop module is used to control the compressor to stop running when the coil temperature is less than or equal to a first temperature threshold.

[0316] In some embodiments, the first acquisition module 1110 is further configured to, after the antifreeze control module 1130 controls the compressor to perform frequency adjustment operation and controls the water volume control unit to perform water volume adjustment operation, wait for a first period of time and then re-acquire the coil temperature corresponding to the air-side heat exchange device through the first temperature sensor.

[0317] In some embodiments, the second acquisition module 1120 is further configured to acquire the outlet water temperature corresponding to the water-side heat exchange device through the second temperature sensor after the antifreeze control module 1130 controls the compressor to perform frequency adjustment operation and controls the water volume control unit to perform water volume adjustment operation, and waits for a first period of time.

[0318] In some embodiments, the air conditioning antifreeze device 1100 further includes a release module.

[0319] The release module is used to release the freeze protection mode if the temperature of the coil corresponding to the air-side heat exchanger is detected to be greater than the second temperature threshold, control the compressor to return to the working state before the frequency adjustment operation, and control the water volume control unit to return to the working state before the water volume adjustment operation.

[0320] In some embodiments, the antifreeze control module 1130 is further configured to determine the target frequency and target water inlet volume based on the coil temperature and the outlet water temperature; control the compressor to adjust the compressor frequency to the target frequency; and control the water volume control unit to adjust the water inlet volume of the water-side heat exchange device to the target water inlet volume.

[0321] In some embodiments, the antifreeze control module 1130 is further configured to determine the frequency adjustment direction and the water inlet adjustment direction based on the coil temperature and the outlet water temperature; control the compressor to adjust the compressor frequency according to a preset frequency step and frequency adjustment direction; and control the water volume control unit to adjust the water inlet of the water-side heat exchange device according to a preset water inlet step and water inlet adjustment direction.

[0322] In some embodiments, the water flow control unit includes multiple water flow control valves, each corresponding to a different inlet water flow rate. The antifreeze control module 1130 is further configured to determine a target water flow control valve from among the multiple water flow control valves based on the coil temperature and the outlet water temperature; control the target water flow control valve to open; and control the other water flow control valves (excluding the target water flow control valve) to close, so that water is transferred to the water-side heat exchanger through the target water flow control valve.

[0323] In this embodiment, the air conditioner collects the coil temperature of the air-side heat exchanger via a first temperature sensor and the outlet water temperature of the water-side heat exchanger via a second temperature sensor. When the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, it indicates that the surface of the air-side heat exchanger has a certain risk of icing. The controller can then control the compressor to perform frequency adjustment and the water volume control unit to perform water volume adjustment based on the coil temperature and the outlet water temperature. By adjusting the compressor frequency and the water inlet flow of the water-side heat exchanger, the coil temperature can be increased, thereby effectively reducing the risk of icing on the surface of the air conditioner's heat exchanger and bringing the outlet water temperature of the water-side heat exchanger closer to the target outlet water temperature range. This can meet the user's hot water needs and improve the stability of the air conditioner's operation.

[0324] Figure 12 This is a structural block diagram of an air conditioner in another embodiment. (See diagram below.) Figure 12 As shown, the air conditioner 1200 may include one or more of the following components: a processor 1210 and a memory 1220 coupled to the processor 1210, wherein the memory 1220 may store one or more computer programs, which may be configured to implement the methods described in the above embodiments when executed by one or more processors 1210.

[0325] The processor 1210 may include one or more processing cores. The processor 1210 connects to various parts within the air conditioner 1200 using various interfaces and lines, and performs various functions and processes data of the air conditioner 1200 by running or executing instructions, programs, code sets, or instruction sets stored in the memory 1220, and by calling data stored in the memory 1220. Optionally, the processor 1210 may be implemented using at least one hardware form selected from Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA).

[0326] The memory 1220 may include random access memory (RAM) or read-only memory (ROM). The memory 1220 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 1220 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as touch functionality, sound playback functionality, image playback functionality, etc.), and instructions for implementing the various method embodiments described above. The data storage area may also store data created by the air conditioner 1200 during use.

[0327] Understandably, the air conditioner 1200 may include more or fewer structural elements than those shown in the above block diagram, such as a power module, physical buttons, a WiFi (Wireless Fidelity) module, a speaker, etc., and may not be limited herein.

[0328] This application discloses a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the methods described in the above embodiments.

[0329] This application discloses a computer program product, including a computer program, which, when executed by a processor, implements the methods described in the above embodiments.

[0330] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, ROM, etc.

[0331] Any references to memory, storage, databases, or other media used herein may include non-volatile and / or volatile memory. Suitable non-volatile memory may include ROM, Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM), which is used as an external cache. By way of illustration and not limitation, RAM may take many forms, such as Static RAM (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), Rambus DRAM (RDRAM), and Direct Rambus DRAM (DRDRAM).

[0332] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also recognize that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0333] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0334] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they can be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0335] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0336] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0337] The foregoing has provided a detailed description of an air conditioning antifreeze method and apparatus, an air conditioner, and a storage medium disclosed in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and its core ideas. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for preventing air conditioning from freezing, characterized in that, The method is applied to an air conditioner, which includes a compressor, a water-side heat exchanger, an air-side heat exchanger, a first temperature sensor, a second temperature sensor, and a water flow control unit. The compressor compresses the refrigerant; the water-side heat exchanger facilitates heat exchange between the refrigerant and water; the air-side heat exchanger facilitates heat exchange between the refrigerant and air; and the water flow control unit controls the water inlet flow of the water-side heat exchanger. The temperature of the coil corresponding to the air-side heat exchanger is collected by the first temperature sensor. The outlet water temperature of the water-side heat exchange device is collected by the second temperature sensor. When the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, the compressor is controlled to perform a frequency adjustment operation and the water volume control unit is controlled to perform a water volume adjustment operation based on the coil temperature and the outlet water temperature, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature range.

2. The method according to claim 1, characterized in that, The step of controlling the compressor to perform frequency adjustment operation and controlling the water volume control unit to perform water volume adjustment operation based on the coil temperature and the outlet water temperature includes: Determine the first outlet water temperature range in which the outlet water temperature falls; Based on the coil temperature and the first outlet water temperature range, the compressor is controlled to perform frequency adjustment operation and the water volume control unit is controlled to perform water volume adjustment operation.

3. The method according to claim 2, characterized in that, The step of controlling the compressor to perform frequency adjustment operation and controlling the water volume control unit to perform water volume adjustment operation based on the coil temperature and the first outlet water temperature range includes: If the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the compressor is controlled to perform a first frequency adjustment operation and the water volume control unit is controlled to perform a first water volume adjustment operation according to the first outlet water temperature range. When the coil temperature is greater than the third temperature threshold and less than or equal to the second temperature threshold, the compressor is controlled to perform a second frequency adjustment operation and the water volume control unit is controlled to perform a second water volume adjustment operation according to the first outlet water temperature range. Wherein, the first frequency adjustment operation is different from the second frequency adjustment operation, and / or the first water volume adjustment operation is different from the second water volume adjustment operation.

4. The method according to claim 3, characterized in that, The target outlet water temperature range belongs to a sub-range that is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold. When the first outlet water temperature range is greater than the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water volume adjustment operation includes prohibiting the increase of the inlet water volume of the water-side heat exchange device. When the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water volume adjustment operation includes reducing the inlet water volume of the water-side heat exchange device. When the first outlet water temperature range is less than or equal to the fourth temperature threshold, the first frequency adjustment operation includes prohibiting the compressor frequency from increasing, and the first water volume adjustment operation includes reducing the inlet water volume of the water-side heat exchange device.

5. The method according to claim 3, characterized in that, The target outlet water temperature range belongs to a sub-range that is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold. When the first outlet water temperature range is greater than the fifth temperature threshold, the second frequency adjustment operation includes reducing the frequency of the compressor, and the second water volume adjustment operation includes preventing the water inlet volume of the water-side heat exchange device from decreasing. When the first outlet water temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the second frequency adjustment operation includes prohibiting the compressor frequency from increasing, and the second water volume adjustment operation includes reducing the inlet water volume of the water-side heat exchange device. When the first outlet water temperature range is less than or equal to the fourth temperature threshold, the second frequency adjustment operation includes prohibiting the compressor frequency from decreasing, and the second water flow adjustment operation includes reducing the inlet water flow of the water-side heat exchange device.

6. The method according to claim 1, characterized in that, The method further includes: If the coil temperature is less than or equal to the first temperature threshold, the compressor is controlled to stop operating.

7. The method according to any one of claims 1 to 6, characterized in that, After controlling the compressor to perform frequency regulation and controlling the water volume control unit to perform water volume regulation, the method further includes: After waiting for the first time period, the steps of collecting the coil temperature of the air-side heat exchanger through the first temperature sensor and collecting the outlet water temperature of the water-side heat exchanger through the second temperature sensor are repeated.

8. The method according to claim 7, characterized in that, The method further includes: If the temperature of the coil corresponding to the air-side heat exchanger is detected to be greater than the second temperature threshold, the freeze protection mode is deactivated, the compressor is controlled to return to the working state before the frequency adjustment operation is performed, and the water volume control unit is controlled to return to the working state before the water volume adjustment operation is performed.

9. The method according to any one of claims 1 to 6, characterized in that, The step of controlling the compressor to perform frequency adjustment operation and controlling the water volume control unit to perform water volume adjustment operation based on the coil temperature and the outlet water temperature includes: The target frequency and target water inflow rate are determined based on the coil temperature and the outlet water temperature. The compressor is controlled to adjust its frequency to the target frequency; The water volume control unit adjusts the inlet water volume of the water-side heat exchange device to the target inlet water volume.

10. The method according to any one of claims 1 to 6, characterized in that, The step of controlling the compressor to perform frequency adjustment operation and controlling the water volume control unit to perform water volume adjustment operation based on the coil temperature and the outlet water temperature includes: The frequency adjustment direction and the water inlet adjustment direction are determined based on the coil temperature and the outlet water temperature. The compressor is controlled to adjust its frequency according to a preset frequency step size and the frequency adjustment direction; The water volume control unit adjusts the water volume of the water-side heat exchange device according to the preset water volume step size and the water volume adjustment direction.

11. The method according to claim 1, characterized in that, The water volume control unit includes multiple water volume control valves, each corresponding to a different inlet water volume; based on the coil temperature and the outlet water temperature, the water volume control unit is controlled to perform water volume adjustment operations, including: Based on the coil temperature and the outlet water temperature, a target water flow control valve is determined from the plurality of water flow control valves; The target water flow control valve is opened, and the other water flow control valves are closed, so that water is transferred to the water-side heat exchange device through the target water flow control valve.

12. The method according to claim 1, characterized in that, The air conditioner also includes a hot water outlet and a drainage device; when the hot water outlet is open, the drainage device is closed, and the water output from the water-side heat exchange device is output through the hot water outlet. When the hot water outlet is closed, the drainage device is opened, and the water output from the water-side heat exchange device is output through the drainage device.

13. The method according to claim 12, characterized in that, The drainage device is configured to be in a closed state when the pipe pressure of the outlet pipe of the water-side heat exchanger is less than the drainage pressure corresponding to the drainage device; and to be in an open state when the pipe pressure of the outlet pipe of the water-side heat exchanger is greater than the drainage pressure corresponding to the drainage device.

14. An air conditioner, characterized in that, include: A compressor is used to compress refrigerant; A water-side heat exchanger is used to exchange heat between the refrigerant and the water. The air-side heat exchanger is used to exchange heat between the refrigerant and the air. A water volume control unit is used to adjust the water inlet volume of the water-side heat exchange device; The first temperature sensor is used to collect the coil temperature corresponding to the air-side heat exchange device. The second temperature sensor is used to collect the outlet water temperature corresponding to the water-side heat exchange device. The controller is used to acquire the coil temperature and the outlet water temperature. When the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, the controller controls the compressor to perform a frequency adjustment operation and controls the water volume control unit to perform a water volume adjustment operation based on the coil temperature and the outlet water temperature, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature range.

15. An air conditioning antifreeze device, characterized in that, The invention is applied to an air conditioner, which includes a compressor, a water-side heat exchanger, an air-side heat exchanger, a first temperature sensor, a second temperature sensor, and a water volume control unit. The compressor is used to compress the refrigerant, the water-side heat exchanger is used to exchange heat between the refrigerant and water, the air-side heat exchanger is used to exchange heat between the refrigerant and air, and the water volume control unit is used to regulate the water inlet flow of the water-side heat exchanger. The air conditioning antifreeze device includes: The first acquisition module is used to acquire the coil temperature corresponding to the air-side heat exchange device through the first temperature sensor. The second acquisition module is used to acquire the outlet water temperature corresponding to the water-side heat exchange device through the second temperature sensor. The antifreeze control module is used to control the compressor to perform frequency adjustment operation and control the water volume control unit to perform water volume adjustment operation when the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, based on the coil temperature and the outlet water temperature, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature range.

16. An air conditioner, characterized in that, The system includes a memory and a processor, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the method as described in any one of claims 1 to 13.

17. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 13.

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