Water-cooled air conditioner, control method, air conditioner Anti-freezing method and device, and storage medium

Abstract

The present disclosure relates to the technical field of air conditioners, and provides a water-cooled air conditioner (100), a control method, an air conditioner anti-freezing method and device, and a storage medium. The water-cooled air conditioner comprises a water path branch (15), a water discharge device (9), and an outlet end (8); the water path branch (15) is connected to an outlet of a water path pipe (17) and can discharge a liquid medium to the outside; the water discharge device (9) is connected to the water path branch (15), and can block and open the water path branch (15); the outlet end (8) is in communication with the outlet of the water path pipe (17) and is connected in parallel to the water path branch (15), and the outlet end (8) can be opened to output the heat-exchanged liquid medium to the outside. By using the water discharge device (9) and the water path branch (15), the present water-cooled air conditioner can keep continuously introducing a new liquid medium for heat exchange, and continuously generating a heat-exchanged liquid medium, such that users can immediately obtain the heat-exchanged liquid medium upon opening the outlet end (8), and the heat exchange efficiency between the liquid medium and coolants is stabilized, thereby avoiding fluctuations in the output of cooling capacity; moreover, the present water-cooled air conditioner does not need to use a water storage apparatus, thus helping to achieve miniaturization in size.

Description

Water-cooled air conditioner and control method, air conditioner anti-freezing method and device, and storage medium

[0001] This application claims priority to Chinese Patent Application No. 202421882558.2, filed on August 5, 2024, and Chinese Patent Application No. 202411155572.7, filed on August 21, 2024, and Chinese Patent Application No. 202411163267.2, filed on August 22, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of air conditioners, and in particular to a water-cooled air conditioner and control method, an air conditioner anti-freezing method and device, and a storage medium. BACKGROUND

[0003] An air conditioner refers to a device for artificially adjusting and controlling the temperature, humidity, flow rate, and other parameters of the air in the environment of a building or structure. A kitchen is a space that every family will configure. Users will use various cooking equipment when cooking in the kitchen, and the heat generated by these cooking equipment will cause the temperature of the kitchen to rise, which is easy to make the user feel uncomfortable.

[0004] At present, some kitchens are configured with water-cooled air conditioners. Unlike traditional air-cooled air conditioners, water-cooled air conditioners can provide cold air and hot water at the same time, meeting the user's demand for adjusting the temperature of the kitchen environment and using hot water. SUMMARY

[0005] The present disclosure aims to solve the problems of unstable heat exchange efficiency, easy fluctuation of refrigerating capacity output, and difficulty in miniaturization of the water-cooled air conditioner.

[0006] According to some embodiments of the present disclosure, a water-cooled air conditioner is provided, which includes a refrigerant circulation loop, a fan, a water circuit pipeline, and a water circuit branch; the refrigerant circulation loop includes a compressor, a first heat exchanger, a throttling device, and a second heat exchanger connected in sequence through a refrigerant pipeline; the fan is used to drive indoor air to flow through the first heat exchanger for heat exchange; the inlet end of the water circuit pipeline is connected with an external cold water input port, the outlet end of the water circuit pipeline is connected with an external water unit, the second heat exchanger is connected to the water circuit pipeline, and the water in the water circuit pipeline exchanges heat with the refrigerant in the refrigerant pipeline in the second heat exchanger; the water circuit branch is connected between the second heat exchanger and the outlet end, and is used to discharge part of the water in the water circuit pipeline; a water drainage device is arranged on the water circuit branch, and is used to control the connection and disconnection of the water circuit branch.

[0007] The water-cooled air conditioner of the present disclosure meets the dual requirements of cold air and hot water in the kitchen environment by setting the second heat exchanger and the first heat exchanger to exchange heat with external cold water and refrigerant. Moreover, the water-cooled air conditioner is connected with a water bypass and a drainage device between the outlet end of the second heat exchanger and the water pipeline, and the water-cooled air conditioner can discharge part of the water in the water pipeline in time by using the water bypass and the drainage device. In this way, when the external water unit is opened, the hot water obtained by heat exchange can flow out through the outlet end of the water pipeline for the user to use; when the external water unit is closed, the pipeline pressure of the water pipeline will continue to rise as the external cold water continues to enter the second heat exchanger, and the water bypass and the drainage device can discharge part of the water in the water pipeline to the outside of the water-cooled air conditioner to reduce the internal pressure of the water pipeline. In this way, the water-cooled air conditioner can continuously introduce new external cold water for heat exchange and continuously produce hot water after heat exchange, so that the user can immediately obtain hot water after heat exchange when opening the external water unit, and the heat exchange efficiency of the water in the water pipeline and the refrigerant in the refrigerant pipeline is stable, avoiding the output fluctuation of the refrigerating capacity. Moreover, the water-cooled air conditioner discharges water in the water pipeline in time through the drainage device, so that the water-cooled air conditioner does not need to use a water storage device and does not need to store liquid medium, which is conducive to realizing miniaturization. BRIEF DESCRIPTION OF DRAWINGS

[0008] FIG. 1 is a structural diagram of a water-cooled air conditioner according to some embodiments.

[0009] FIG. 2 is a connection structural diagram of a water-cooled air conditioner according to some embodiments.

[0010] FIG. 3 is another connection structural diagram of a water-cooled air conditioner according to some embodiments.

[0011] FIG. 4 is still another connection structural diagram of a water-cooled air conditioner according to some embodiments.

[0012] FIG. 5 is a path structural diagram of refrigerant and tap water when the drainage device in FIG. 4 is closed.

[0013] FIG. 6 is a path structural diagram of refrigerant and tap water when the drainage device in FIG. 4 is opened.

[0014] FIG. 7 is a structural diagram of a water-cooled air conditioner at another angle according to some embodiments.

[0015] FIG. 8 is an internal structural diagram of a water-cooled air conditioner according to some embodiments.

[0016] FIG. 9 is an enlarged structural diagram of A in FIG. 8.

[0017] FIG. 10 is an internal structural diagram of a water-cooled air conditioner at another angle according to some embodiments.

[0018] FIG. 11 is a structural diagram of the adjustment device employing a parallel arrangement, according to some embodiments.

[0019] FIG. 12 is a structural diagram of a second heat exchanger arranged around a compressor, according to some embodiments.

[0020] FIG. 13 is a structural diagram of a water-cooled air conditioner, according to some embodiments.

[0021] FIG. 14 is a connection structural diagram of a water-cooled air conditioner, according to some embodiments.

[0022] FIG. 15 is another connection structural diagram of a water-cooled air conditioner, according to some embodiments.

[0023] FIG. 16 is a step diagram of a controller controlling a water flow of a cold water inlet based on a difference AT, according to some embodiments.

[0024] FIG. 17 is another connection diagram of a controller, according to some embodiments.

[0025] FIG. 18 is a flowchart of a controller performing a first example, according to some embodiments.

[0026] FIG. 19 is a flowchart of a controller performing a second example, according to some embodiments.

[0027] FIG. 20 is a flowchart of a controller performing a third example, according to some embodiments.

[0028] FIG. 21 is a configuration structural diagram of a wind speed gear and a water flow gear, according to some embodiments.

[0029] FIG. 22 is a flowchart of a controller performing a fourth example, according to some embodiments.

[0030] FIG. 23 is a flowchart of a controller performing a fifth example, according to some embodiments.

[0031] FIG. 24 is a structural diagram of a water-cooled air conditioner in some embodiments of the related art.

[0032] FIG. 25A is a structural diagram of a water-cooled air conditioner, according to some embodiments.

[0033] FIG. 25B is another structural diagram of a water-cooled air conditioner, according to some embodiments.

[0034] FIG. 26 is a flowchart of a water-cooled air conditioner anti-freezing method, according to some embodiments.

[0035] FIG. 27 is another flowchart of a water-cooled air conditioner anti-freezing method, according to some embodiments.

[0036] FIG. 28 is a flowchart of controlling the compressor to perform a frequency adjustment operation and controlling the water amount control unit to perform a water amount adjustment operation according to a first water outlet temperature interval in which the water outlet temperature is located according to the coil temperature and the water outlet temperature according to some embodiments.

[0037] FIG. 29 is a flowchart of a freeze protection method of a water-cooled air conditioner according to some embodiments.

[0038] FIG. 30 is a flowchart of controlling the compressor to perform a frequency adjustment operation and controlling the water amount control unit to perform a water amount adjustment operation according to the coil temperature and the water outlet temperature according to some embodiments.

[0039] FIG. 31 is a flowchart of controlling the compressor to perform a frequency adjustment operation and controlling the water amount control unit to perform a water amount adjustment operation according to the coil temperature and the water outlet temperature according to some embodiments.

[0040] FIG. 32 is a configuration diagram of a water-cooled air conditioner according to some embodiments.

[0041] FIG. 33 is a configuration block diagram of a water-cooled air conditioner according to some embodiments.

[0042] FIG. 34 is a configuration block diagram of a freeze protection device of an air conditioner according to some embodiments.

[0043] FIG. 35 is another configuration diagram of a water-cooled air conditioner according to some embodiments. DETAILED DESCRIPTION

[0044] Some embodiments of the present disclosure will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments provided in the present disclosure, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0045] Unless the context clearly requires otherwise, throughout the description and the claims, the term "comprise," and variations thereof (e.g., "comprises" and "comprising"), will be construed to be inclusive in a manner consistent with the term's plain meaning, namely, "including but not limited to." In describing the description, the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example" or "some examples," and the like, mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the disclosure, but that it can not be included in other embodiments or examples. The illustrative appearance of the foregoing terms in various places in the description are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0046] Hereinafter, the terms "first", "second", etc. are used only for the purpose of description and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the disclosure, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0047] In describing some embodiments, "coupled" and "connected," and variations thereof, can be used. The term "connected" should be interpreted broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrated; can be directly connected, or indirectly connected through an intermediate medium. The term "coupled" indicates that two or more components have direct physical contact or electrical contact. The term "coupled" or "communicatively coupled" can also mean that two or more components do not have direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content herein.

[0048] "A, B, and C at least one of" has the same meaning as "at least one of A, B, or C", and includes the following combinations of A, B, and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0049] "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0050] The use of “adapted for” or “configured for” herein means open and inclusive language that does not exclude devices adapted for or configured for performing additional tasks or steps.

[0051] As used herein, “about,” “approximately” or “around” includes the recited value and the average value within an acceptable range of deviation from the particular value, as determined by one of ordinary skill in the art taking into account the measurement being discussed and the error associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0052] As used herein, “parallel,” “perpendicular,” “equal” includes the recited condition and conditions that approximate the recited condition, the approximation being within an acceptable range of deviation, as determined by one of ordinary skill in the art taking into account the measurement being discussed and the error associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallel and near parallel, where near parallel can have an acceptable range of deviation of, for example, within 5°; “perpendicular” includes absolute perpendicular and near perpendicular, where near perpendicular can also have an acceptable range of deviation of, for example, within 5°. “Equal” includes absolute equality and near equality, where near equality can have an acceptable range of deviation of, for example, less than or equal to 5% of either of the two quantities being compared.

[0053] A related water-cooled air conditioner is generally provided with a water storage tank. By collecting the heat released in the refrigerant condensation process, and transferring the heat to the water in the water storage tank, the temperature of the water in the water storage tank is raised, forming hot water. When the user needs to use hot water, the hot water stored in the water storage tank is output for the user to use.

[0054] Based on the demand for water storage in the water storage tank, the water in the water storage tank cannot be easily discharged. However, as the temperature of the water in the water storage tank rises, the temperature difference between the refrigerant and the water will decrease, resulting in a gradual decrease in the heat exchange efficiency between the two, and the utilization rate of the heat released in the refrigerant condensation process is not high, and this will also cause the air conditioning unit to be in a high load operation state, and the power consumption gradually increases. Although the water storage tank will be refilled with cold water after the hot water in the water storage tank is used, which will lower the temperature of the water in the water storage tank and improve the heat exchange efficiency between the refrigerant and the water, but this will also cause the refrigerating capacity output of the air conditioner to fluctuate, and the air flow output by the air conditioner to the indoor will be hot and cold, affecting the user experience. Moreover, the volume of the water storage tank is generally large, which causes the related water-cooled air conditioner to be unable to reduce the volume, making it difficult to realize product miniaturization, and the product has more restrictions on the layout in the kitchen.

[0055] To solve the above problems, some embodiments of the present disclosure provide a water-cooled air conditioner 100, as shown in FIG. 1 and FIG. 2, which can perform a refrigeration cycle of an air conditioner through a compressor 4, a condenser, an expansion valve, and an evaporator. The refrigeration cycle can include a series of processes such as compression, condensation, expansion, and evaporation, and provide cold or heat to indoor air by heat absorption or heat release of refrigerant, to adjust the temperature of indoor air.

[0056] The compressor 4 compresses refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0057] The expansion valve expands the high-temperature and high-pressure liquid phase refrigerant condensed in the condenser into low-pressure liquid phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 4. The evaporator can achieve a refrigeration effect by exchanging heat with the material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of indoor air.

[0058] The directions described herein are based on the direction of the user facing the air conditioner. Among them, the left and right are distinguished as the user faces the air conditioner. The side of the air conditioner facing the user during use is defined as the front side, and the opposite side is defined as the back side. The upper side and the lower side of the air conditioner during normal operation are defined to distinguish between up and down.

[0059] In some embodiments, as shown in FIG. 1 and FIG. 2, the water-cooled air conditioner 100 can include a housing 1. The housing 1 can have an air inlet 101 and an air outlet 102.

[0060] In some embodiments, as shown in FIG. 1 and FIG. 2, the housing 1 can be provided with a compressor 4, a first heat exchanger 5, a fan 6, a throttling device 14, and a second heat exchanger 7. The compressor 4, the first heat exchanger 5, the throttling device 14, and the second heat exchanger 7 can be connected in sequence through a refrigerant pipeline 16 to form a refrigerant circulation loop.

[0061] In some embodiments, as shown in FIG. 2, the compressor 4 can be used to compress the driving refrigerant, and the compressor 4 can change the refrigerant from a low-temperature and low-pressure state to a high-temperature and high-pressure state, and drive the refrigerant to pass through the second heat exchanger 7, the throttling device 14, and the first heat exchanger 5 in sequence.

[0062] In some embodiments, as shown in FIG. 2, in the refrigerant circulation loop, the first heat exchanger 5 can be a condenser, and the second heat exchanger 7 can be an evaporator. After the compressor 4 compresses the refrigerant s, the high-temperature and high-pressure gaseous refrigerant is output to the second heat exchanger 7. After releasing heat in the second heat exchanger 7, the refrigerant is transported to the first heat exchanger 5. In the first heat exchanger 5, the refrigerant absorbs heat from the passing air and becomes low-temperature gaseous refrigerant back to the compressor 4. The throttling device 14, such as an expansion valve, a capillary tube, etc., arranged between the second heat exchanger 7 and the first heat exchanger 5, can make the refrigerant released heat in the second heat exchanger 7 pass through the throttling device 14 to become low-temperature and low-pressure state, and then flow into the first heat exchanger 5.

[0063] In some embodiments, as shown in FIG. 2, the fan 6 and the first heat exchanger 5 are matched with each other. The fan 6 is started to enable the indoor air to be sucked into the casing 1 and flow through the first heat exchanger 5. The first heat exchanger 5 can be used to exchange heat between the indoor air flow and the refrigerant transported in the first heat exchanger 5. In the first heat exchanger 5, the low-temperature refrigerant absorbs heat from the sucked air to reduce the air temperature and become cold air, which is then output to the room by the fan 6. By controlling the rotating speed of the fan 6, the cold air output of the water-cooled air conditioner 100 can be adjusted. According to the use needs, the first heat exchanger 5 can use a tube-fin heat exchanger, or a micro-channel heat exchanger, etc., which can realize the heat exchange between the refrigerant and the air.

[0064] In some embodiments, as shown in FIG. 2, in the refrigerant circulation loop, the second heat exchanger 7 can be configured with two pipelines, i.e., a first heat exchange tube 7a and a second heat exchange tube 7b. The first heat exchange tube 7a can be used to connect the compressor 4 and the throttling device 14, and the first heat exchange tube 7a is used for the refrigerant flow. The inlet end of the first heat exchange tube 7a is the refrigerant inlet 70a, and the outlet end of the first heat exchange tube 7a is the refrigerant outlet 71a. The second heat exchange tube 7b can be used to introduce external cold water, and the heat exchange between the external cold water transported in the second heat exchange tube 7b and the refrigerant in the first heat exchange tube 7a enables the refrigerant in the second heat exchanger 7 to release heat to the external cold water, so that the temperature of the external cold water is increased, thereby enabling the water-cooled air conditioner 100 to output high-temperature hot water to the outside. The inlet end of the second heat exchange tube 7b is the cold water inlet 70b, and the outlet end of the second heat exchange tube 7b is the hot water outlet 71b. In the first heat exchanger 5, the low-temperature refrigerant absorbs heat from the air to reduce the temperature of the air, thereby enabling the water-cooled air conditioner 100 to output cold air to the outside.

[0065] Generally, based on the application scenario of the water-cooled air conditioner 100, the liquid medium flowing in the second heat exchange pipe 7b is water. For example, when the water-cooled air conditioner 100 is applied to a kitchen environment, the second heat exchange pipe 7b can be connected to the tap water pipe of the kitchen, so that the water-cooled air conditioner 100 can use tap water to exchange heat with the refrigerant. In this way, the water-cooled air conditioner 100 can not only output hot water to the indoor environment, but also use the heat generated by the evaporation of the refrigerant to prepare hot water and provide hot water to the user.

[0066] It should be noted that the water-cooled air conditioner 100 can continuously introduce tap water to ensure that heat exchange can be continuously performed in the second heat exchanger 7, so that the temperature of the refrigerant in the second heat exchanger 7 is reduced. In this way, the water-cooled air conditioner 100 will continuously produce hot water, so the water-cooled air conditioner 100 will be provided with a water circuit 17. The inlet end 12 of the water circuit 17 is connected to the external cold water inlet, and the outlet end 8 of the water circuit 17 is connected to the external water unit. The second heat exchanger 7 is connected to the water circuit 17, so that the water flowing in the water circuit 17 exchanges heat with the refrigerant flowing in the refrigerant circuit 16 in the second heat exchanger 7.

[0067] The outlet end 8 of the water circuit 17 is connected to the second heat exchange pipe 7b and the external water unit. Therefore, when the external water unit is opened, the outlet end 8 of the water circuit 17 can output hot water to the outside. In this way, when the user uses hot water, the hot water produced by the water-cooled air conditioner 100 can flow to the faucet 13 opened by the user to supply the user. Moreover, after the tap water in the second heat exchange pipe 7b is discharged from the outlet end 8, the tap water will be supplemented to the second heat exchanger 7 from the cold water inlet 70b of the second heat exchange pipe 7b, so that the tap water can continuously enter the second heat exchange pipe 7b of the second heat exchanger 7.

[0068] In the case that the user stops using hot water, the water-cooled air conditioner 100 needs to discharge the tap water in the second heat exchange pipe 7b, so in the water-cooled air conditioner 100, the hot water outlet 71b of the second heat exchange pipe 7b is connected with a water branch 15 and a water discharge device 9, the water branch 15 is connected between the hot water outlet 71b and the outlet end 8, and the water branch 15 is used to discharge part of the water in the water pipe 17. The water discharge device 9 is used to control the connection and disconnection of the water branch 17. Generally, the water discharge device 9 can have a pressure threshold value for controlling its opening and closing. Moreover, the water discharge device 9 can be closed when the pressure at the outlet of the second heat exchange pipe 7b does not exceed the pressure threshold value, so as to block the water branch 15. The water discharge device 9 can be opened when the pressure at the outlet of the second heat exchange pipe 7b exceeds the pressure threshold value, so as to open the water branch 15, thereby discharging the water flowing in the second heat exchange pipe 7b. For example, the water discharge device 9 can be a pressure relief valve, and through the pressure threshold value configured by the pressure relief valve itself, the water branch 15 can be blocked or opened based on the pipe pressure of the second heat exchange pipe 7b.

[0069] By configuring the water route branch 15 and the drainage device 9, the water-cooled air conditioner can output hot water to the outside through the water faucet 13 and the outlet end 8 opened by the user when the user needs to use hot water. At this time, as shown in FIG. 5, since the hot water can be discharged from the outlet end 8, the pipe pressure of the second heat exchange pipe 7b is not high, and the tap water can be introduced into the second heat exchanger 7 and then discharged through the outlet end 8 to realize continuous flow. In the case where the user does not use hot water, i.e., the water faucet 13 is closed, the outlet end 8 cannot discharge hot water to the outside. At this time, as shown in FIG. 6, the tap water accumulates in the water route pipe 17, so that the internal pressure of the water route pipe 17 and the second heat exchange pipe 7b increases. When the internal pressure of the water route pipe 17 and the second heat exchange pipe 7b exceeds the pressure threshold of the drainage device 9, the drainage device 9 is immediately opened, so that the water route branch 15 is opened, and part of the tap water in the water route pipe 17 and the second heat exchange pipe 7b can be discharged to the outside of the water-cooled air conditioner 100 through the water route branch 15 to reduce the internal pressure of the water route pipe 17 and the second heat exchange pipe 7b, until the internal pressure of the water route pipe 17 and the second heat exchange pipe 7b is lower than the pressure threshold of the drainage device 9, so that the drainage device 9 is closed. In this way, the water-cooled air conditioner 100 can conveniently and quickly identify the user's water use condition without additional detection means, and the water-cooled air conditioner 100 can seamlessly output hot water to the user end without other control means. Moreover, by arranging the water route branch 15, the water-cooled air conditioner 100 has two flow paths, and the tap water can select the flow path according to the opening of the outlet end 8 and the opening of the water route branch 15. In this way, whether the user uses hot water or not, the tap water flowing into the second heat exchanger 7 can be discharged to the outside of the water-cooled air conditioner 100, so that the water-cooled air conditioner 100 can continuously introduce new tap water for heat exchange and continuously produce heat-exchanged hot water, which not only enables the user to immediately obtain hot water by opening the outlet end 8, but also stabilizes the temperature of the tap water in the second heat exchanger 7, thereby stabilizing the heat exchange efficiency of the refrigerant in the second heat exchanger 7 and ensuring the refrigerating capacity output of the water-cooled air conditioner 100.

[0070] It should be noted that when the pressure threshold of the drainage device 9 adopts the valve body 11a for adjusting the pipe pressure such as a pressure relief valve, the pressure threshold of the drainage device 9 can be configured according to the specifications of the water route pipe 17 and the second heat exchange pipe 7b and the flow of tap water.

[0071] It should be noted that the tap water and the refrigerant flow in the second heat exchange pipe 7b and the first heat exchange pipe 7a of the second heat exchanger 7, respectively. To ensure the heat exchange efficiency of the tap water and the refrigerant, the second heat exchange pipe 7b and the first heat exchange pipe 7a can be arranged close to each other to ensure that the tap water and the refrigerant can be heat-exchanged in the second heat exchanger 7.

[0072] The greater the flow rate of the tap water, the greater the total amount of tap water that exchanges heat in the second heat exchanger 7. Thus, the greater the total amount of heat absorbed by the tap water from the refrigerant, and the lower the temperature of the refrigerant after exchanging heat in the second heat exchanger 7.

[0073] The tap water and the refrigerant need to have a certain temperature difference to exchange heat. Generally speaking, the greater the temperature difference, the higher the heat exchange efficiency of the tap water and the refrigerant, and the smaller the temperature difference, the lower the heat exchange efficiency of the tap water and the refrigerant. Considering that the tap water absorbs heat and rises in temperature in the second heat exchanger 7, while the refrigerant releases heat and falls in temperature in the second heat exchanger 7, as shown in FIG. 2, in some embodiments, in the second heat exchanger 7, the conveying direction of the refrigerant in the first heat exchange pipe 7a can be opposite to the conveying direction of the water in the second heat exchange pipe 7b. Moreover, the refrigerant outlet 71a of the first heat exchange pipe 7a can be arranged adjacent to the cold water inlet 70b of the second heat exchange pipe 7b.

[0074] It should be noted that when the refrigerant flows from the cold water inlet 70b of the first heat exchange pipe 7a to the refrigerant outlet 71a of the first heat exchange pipe 7a, the temperature of the refrigerant decreases, while when the tap water flows from the cold water inlet 70b of the second heat exchange pipe 7b to the outlet of the second heat exchange pipe 7b, the temperature of the tap water increases. The conveying direction of the refrigerant in the first heat exchange pipe 7a is opposite to the conveying direction of the liquid medium in the second heat exchange pipe 7b, which can make the low-temperature tap water close to the low-temperature refrigerant, and the high-temperature tap water close to the high-temperature refrigerant. The temperature difference between the tap water and the refrigerant in the second heat exchanger 7 can be kept relatively stable, thereby avoiding fluctuations in the heat exchange efficiency of the second heat exchanger 7.

[0075] In some embodiments, as shown in FIGS. 8 and 9, the first heat exchange pipe 7a can be sleeved on the outer periphery of the second heat exchange pipe 7b. The trajectory line of the arrangement of the first heat exchange pipe 7a can coincide with the trajectory line of the arrangement of the second heat exchange pipe 7b. The refrigerant inlet 70a of the first heat exchange pipe 7a can be arranged adjacent to the hot water outlet 71b of the second heat exchange pipe 7b. In this way, the refrigerant and the tap water can continuously exchange heat in the second heat exchanger 7, thereby improving the heat exchange efficiency of the refrigerant and the tap water.

[0076] In some embodiments, as shown in FIGS. 8 and 10, the first heat exchange pipe 7a and the second heat exchange pipe 7b can be arranged in the housing 1 in a spiral manner, thereby prolonging the time for the refrigerant and the tap water to flow in the respective pipelines, thereby improving the heat exchange efficiency of the refrigerant and the tap water. The spiral arrangement of the first heat exchange pipe 7a and the second heat exchange pipe 7b can reduce the arrangement space required by the first heat exchange pipe 7a and the second heat exchange pipe 7b. Thus, the first heat exchange pipe 7a and the second heat exchange pipe 7b can be arranged beside the compressor 4, for example, on the left side or the right side of the compressor 4.

[0077] In some embodiments, as shown in FIG. 2 and FIG. 12, the first heat exchange pipe 7a and the second heat exchange pipe 7b can also be arranged around the compressor 4, thereby further reducing the arrangement space of the first heat exchange pipe 7a and the second heat exchange pipe 7b, so that the volume of the water-cooled air conditioner 100 is smaller.

[0078] According to different application scenarios of the water-cooled air conditioner 100 according to the present disclosure, the drain port of some application scenarios can not be directly accessed, so the water-cooled air conditioner 100 can be configured with a drainage structure to facilitate the discharge of the liquid medium.

[0079] In some embodiments, as shown in FIG. 10, the water-cooled air conditioner 100 can include a drainage assembly 10. The drainage assembly 10 can be used to collect water discharged by the drainage device 9.

[0080] In some embodiments, as shown in FIG. 3 and FIG. 10, the drainage assembly 10 can include a water collecting container 10a. The water collecting container 10a can be connected with the water path branch 15, and the water collecting container 10a can be used to store water discharged by the drainage device 9.

[0081] In some embodiments, as shown in FIG. 10, the drainage assembly 10 can include a first drain port 10b. The first drain port 10b can be arranged on and communicated with the water collecting container 10a, so as to discharge water in the water collecting container 10a to the outside of the water-cooled air conditioner 100. According to different space arrangements, the drainage device 9 can be directly placed in the water collecting container 10a, or placed outside the water collecting container 10a and then connected to the water collecting container 10a through a pipeline.

[0082] The water collecting container 10a can collect and store tap water discharged by the drainage device 9. By using the first drain port 10b, the drainage assembly 10 can use the flowability of the tap water itself to discharge the heat-exchanged tap water to the indoor drain port. The first drain port 10b is generally arranged on the side wall of the water collecting container 10a, and by adjusting the distance between the first drain port 10b and the bottom of the water collecting container 10a, the drainage timing of the water collecting container 10a can be controlled.

[0083] Of course, in addition to relying on the flowability and gravity of tap water to achieve passive drainage, the drainage assembly 10 can also be provided with an active drainage design. In some embodiments, as shown in FIG. 10, the drainage assembly 10 can include a pump 10c. The pump 10c can be connected to the water collecting container 10a, and the pump 10c is used to extract the fluid stored in the water collecting container 10a.

[0084] In some embodiments, as shown in FIG. 10, the drainage assembly 10 can include a second drain port 10d. The second drain port 10d can be connected to the pump 10c and used to discharge the fluid extracted by the pump 10c to the outside of the water-cooled air conditioner 100. The second drain port 10d can be arranged above the first drain port 10b.

[0085] When the user needs to actively drain water, the water in the water collecting container 10a can be pumped out by starting the pump 10c, so as to achieve active drainage. By arranging the second drainage port 10d above the first drainage port 10b, the second drainage port 10d can be more easily connected to the indoor drain to adapt to the design of the drain at different heights in various indoor environments.

[0086] In some embodiments, as shown in FIG. 8, considering that the water collecting container 10a is generally arranged in the shell 1 of the water-cooled air conditioner 100, it is inconvenient for the user to observe the water storage condition of the water collecting container 10a, the drainage assembly 10 can include a water level monitoring device 10e. The water level monitoring device 10e can be used to monitor the height of the water in the water collecting container 10a. The water level monitoring device 10e can be connected with the pump 10c, so that when the water level in the water collecting container 10a reaches a certain height, the pump 10c is started to pump out the water in the water collecting container 10a, so that the water in the water collecting container 10a is drained out of the water-cooled air conditioner 100.

[0087] In the process of operating the air conditioning unit in refrigeration mode, the surface of the condenser is prone to produce condensate water due to the low temperature of the condenser. In order to avoid the condensate water polluting the internal environment of the air conditioning unit and affecting the normal operation of the air conditioning unit, the condensate water generated by the condenser needs to be collected and drained. As shown in FIGS. 4, 8 and 10, in some embodiments, the drainage assembly 10 can include a water collecting tray 10f. The water collecting tray 10f can be arranged below the first heat exchanger 5, and the water collecting tray 10f can be used to collect the condensate water of the first heat exchanger 5. The water collecting tray 10f can be connected to the water collecting container 10a to transport the condensate water generated by the first heat exchanger 5 into the water collecting container 10a.

[0088] It should be noted that the water collecting tray 10f can flow the condensate water into the water collecting container 10a based on its own flowability and gravity by arranging the height of the water collecting tray 10f to be higher than that of the water collecting container 10a. Alternatively, the water collecting tray 10f can also transport the condensate water into the water collecting container 10a by arranging a conveying device. The conveying mode of the condensate water can be configured according to the specifications and performance of the water-cooled air conditioner 100.

[0089] It should be noted that the flow rate of tap water will affect the heat exchange efficiency of the second heat exchanger 7 and the temperature of the refrigerant in the refrigeration cycle, so adjusting the flow rate of tap water is one way for the water-cooled air conditioner 100 to adjust the refrigerating capacity. In some embodiments, as shown in FIGS. 2 and 11, the water-cooled air conditioner 100 can include an adjusting device 11. The adjusting device 11 can be connected between the cold water inlet 70b of the second heat exchanger tube 7b and the inlet end 12 of the water pipeline 17. The adjusting device 11 can adjust the flow area of the water pipeline 17 to introduce water, so as to adjust the flow rate of water in the second heat exchanger tube 7b.

[0090] In some embodiments, as shown in FIG. 2 and FIG. 11, the adjusting device 11 can be a valve body 11a. The number of valve bodies 11a can be one or multiple. Multiple valve bodies 11a are connected in parallel or in series, which can realize the adjustment of the flow area of the second heat exchange pipe 7b, and further realize the adjustment of the refrigerating capacity of the air conditioning unit. The adjusting device 11 can also be other flow regulators with the same function.

[0091] It should be noted that the structure of the shell 1 of the water-cooled air conditioner 100 is diverse. Generally, the compressor 4, the first heat exchanger 5, the second heat exchanger 7, the fan 6 and other structures are arranged in the shell 1 to form an integrated structure, so that the water-cooled air conditioner 100 can be installed in a space-limited environment such as a kitchen, which has a hot water use demand. In some embodiments, as shown in FIG. 1, FIG. 7 and FIG. 8, the shell 1 can include an upper shell 1a and a lower shell 1b. The upper shell 1a can be arranged above the lower shell 1b. The first heat exchanger 5 can be arranged in the upper shell 1a. The lower shell 1b can be arranged below the upper shell 1a. The compressor 4, the second heat exchanger 7 and the drain device 9 can be arranged in the lower shell 1b.

[0092] In some embodiments, as shown in FIG. 8 and FIG. 10, the compressor 4 can be arranged on one side of the lower shell 1b. The second heat exchanger 7 can be arranged on the other side of the lower shell 1b, so that the compressor 4 and the second heat exchanger 7 do not interfere with each other. The water collecting container 10a can be arranged below the second heat exchanger 7 and suspended above the bottom of the lower shell 1b. The water pan 10f can be arranged above the compressor 4 and the second heat exchanger 7 to collect the condensed water generated by the first heat exchanger 5 above it. The fan 6 can be arranged above the water pan 10f to cooperate with the first heat exchanger 5.

[0093] In some embodiments, as shown in FIG. 1, FIG. 7 and FIG. 8, the upper shell 1a can be provided with an air inlet 101 and an air outlet 102. The air outlet 102 can be arranged on the front side of the upper shell 1a to output cold air to the indoor. The air inlet 101 can be arranged on the front side of the upper shell 1a below the air outlet 102 to introduce indoor air. The outlet end 8 can be arranged on the lower shell 1b.

[0094] In some embodiments, as shown in FIG. 2 and FIG. 7, the lower shell 1b can be provided with an inlet end 12 below the outlet end 8, which can be used to introduce water. The outlet end 8, the first drain port 10b and the second drain port 10d can be arranged on the lower shell 1b, respectively. The inlet end 12, the outlet end 8, the first drain port 10b and the second drain port 10d can be arranged on the rear side of the lower shell 1b, respectively, so that the waterway interface and the airway interface are arranged on the rear side and the front side of the shell 1, respectively, to facilitate the water-cooled air conditioner 100 to access the waterway and output cold air to the indoor.

[0095] In combination with the above various embodiments, the water-cooled air conditioner 100 provided by the present disclosure achieves the dual requirements of cold air and hot water for the kitchen environment by setting the second heat exchanger 7 and the first heat exchanger 5 to exchange heat with water and refrigerant. The water-cooled air conditioner 100 of the present disclosure is connected with the water route branch 15 and the drainage device 9 between the hot water outlet 71b of the second heat exchange pipe 7b and the outlet end 8 of the water route pipeline 17. By using the drainage device 9, the drainage device 9 can be kept closed when the internal pressure of the water route pipeline 17 and the second heat exchange pipe 7b does not exceed the pressure threshold, thereby blocking the water route branch 15 so that water cannot be discharged from the water route branch 15. Moreover, by using the drainage device 9, the drainage device 9 can be opened when the internal pressure of the water route pipeline 17 and the second heat exchange pipe 7b exceeds the pressure threshold, so that the water route branch 15 is opened, thereby discharging the water flowing in the water route pipeline 17 and the second heat exchange pipe 7b. In this way, when the outlet end 8 is opened, the hot water obtained by heat exchange can flow out through the outlet end 8 for the user to use; and when the outlet end 8 is closed, as water continues to enter the second heat exchanger 7, the pipeline pressure of the water route pipeline 17 and the second heat exchange pipe 7b will continue to rise, and when the internal pressure of the water route pipeline 17 and the second heat exchange pipe 7b exceeds the pressure threshold of the drainage device 9, the drainage device 9 will be opened, so that part of the water in the water route pipeline 17 and the second heat exchange pipe 7b can be discharged to the outside of the water-cooled air conditioner 100 through the water route branch 15, so as to reduce the internal pressure of the second heat exchange pipe 7b. In this way, the water-cooled air conditioner 100 of the present disclosure can continuously introduce new water for heat exchange and continuously generate heat-exchanged water, not only allowing the user to immediately obtain heat-exchanged water by opening the outlet end 8, but also stabilizing the heat exchange efficiency of water and refrigerant and avoiding fluctuations in refrigeration output. Moreover, the water-cooled air conditioner 100 realizes timely drainage of water by the drainage device 9, so that the water-cooled air conditioner 100 does not need to use a water storage device and does not need to store water, which is conducive to realizing miniaturization.

[0096] The water-cooled air conditioner 100 of the present disclosure arranges the drainage assembly 10 so that the condensate water generated by refrigeration and the water used in the heat exchange process can be discharged in time, and uses the water collecting container 10a and the pump 10c of the drainage assembly 10 so that the water-cooled air conditioner 100 can adapt to the layout of the drainage port of various application scenarios and ensure that the condensate water generated by refrigeration and the water used in the heat exchange process can be discharged outside the air conditioning unit in time.

[0097] The heat exchange condition of the condensing end of the water-cooled air conditioner directly affects whether the water-cooled air conditioner can operate normally. The difference ΔT between the refrigerant outlet temperature T 冷出 and the cold water inlet temperature T 入水 can effectively reflect the water flow condition of the cold water inlet of the water-cooled air conditioner. By comparing the refrigerant outlet temperature T 冷出 and the cold water inlet temperature T 入水The difference ΔT is limited in an adaptive range, so that the water-cooled air conditioner of the present disclosure can control the water flow at the water inlet, the water-cooled air conditioner can maintain an appropriate water flow during the operation of the water-cooled air conditioner, ensure that the heat exchange efficiency of the refrigeration cycle can be in the high-efficiency range, and avoid waste of water resources.

[0098] To solve the above problems,

[0099] Some embodiments of the present disclosure provide a water-cooled air conditioner 100 and a control method. As shown in FIG. 13, the water-cooled air conditioner 100 can include a housing 1. The housing 1 has an air inlet 101 and an air outlet 102.

[0100] In some embodiments, as shown in FIGS. 13 and 14, the housing 1 can be provided with a compressor 4, a second heat exchanger 7 and a first heat exchanger 5. The second heat exchanger 7 can have two pipelines therein, one of which is used to transport refrigerant, and the other of which is used to transport tap water. The two pipelines can be close to each other inside the second heat exchanger 7, so that the media flowing in the two pipelines respectively can exchange heat.

[0101] In some embodiments, as shown in FIG. 14, the compressor 4, one of the pipelines of the second heat exchanger 7 and the first heat exchanger 5 are connected in sequence, so that the refrigerant can flow out of the compressor 4, flow in the pipeline of the second heat exchanger 7 for transporting refrigerant, evaporate in the second heat exchanger 7, flow to the first heat exchanger 5 for condensation, and then flow back to the compressor 4, forming a refrigeration cycle of the water-cooled air conditioner 100. Based on the flow path of the refrigerant, the second heat exchanger 7 has a refrigerant inlet 70a and a refrigerant outlet 71a, and the refrigerant flows from the refrigerant inlet 70a to the refrigerant outlet 71a to pass through the second heat exchanger 7. In some embodiments, a throttling device 14 can be provided between the second heat exchanger 7 and the first heat exchanger 5 to control the flow of refrigerant in the refrigeration cycle.

[0102] In some embodiments, as shown in FIG. 14, the first heat exchanger 5 can be provided with a fan 6. The fan 6 can be driven by an electric motor (not shown in the figure), and the fan 6 can introduce air outside the water-cooled air conditioner 100 to the first heat exchanger 5, so that the introduced air exchanges heat with the first heat exchanger 5 and is cooled. The fan 6 can blow the cooled air to the indoor to provide cool air for the indoor users. In order to enhance the heat exchange effect between the air and the first heat exchanger 5, a coil structure can be used in the first heat exchanger 5 for the refrigerant to pass through.

[0103] In some embodiments, as shown in FIG. 14, another pipeline of the second heat exchanger 7 is provided with a cold water inlet 70b and a hot water outlet 71b. The cold water inlet 70b can be close to the refrigerant outlet 71a of the second heat exchanger 7, and the cold water inlet 70b can introduce an external water source into the second heat exchanger 7 to exchange heat with the refrigerant. The hot water outlet 71b can output the hot water generated after heat exchange to the outside of the second heat exchanger 7. The source of the external water source can be configured according to the application scenario of the water-cooled air conditioner 100. Generally, the external water source is obtained by being connected to a tap water pipe. After the tap water flows into the second heat exchanger 7 from the cold water inlet 70b and exchanges heat with the refrigerant to form hot water, the tap water flows out from the hot water outlet 71b. A drain device 9 can be arranged downstream of the hot water outlet 71b in the flow direction of the tap water, so that the second heat exchanger 7 can drain the hot water after heat exchange from the system unit when the user does not use hot water.

[0104] In some embodiments, as shown in FIG. 14, the water-cooled air conditioner 100 can be provided with a controller 2. The controller 2 can control the water inflow of the cold water inlet 70b. As a first example of the present disclosure, as shown in FIG. 18, the controller 2 can be configured to include steps S21-S24:

[0105] Step S21, obtaining a first preset temperature T1, a second preset temperature T2, and T2 冷出 and the temperature T 入水 of the cold water inlet 70b, and obtaining the difference AT between the temperature T 冷出 of the refrigerant outlet 71a and the temperature T 入水 of the cold water inlet 70b, AT = T 冷出 -T 入水 ;

[0106] Step S22, in the case of T2≤ AT ≤ T1, maintaining the water inflow of the cold water inlet 70b of the water-cooled air conditioner 100;

[0107] Step S23, in the case of AT < T2, reducing the water inflow of the cold water inlet 70b of the water-cooled air conditioner 100;

[0108] Step S24, in the case of T1 < AT, increasing the water inflow of the cold water inlet 70b of the water-cooled air conditioner 100.

[0109] It should be noted that steps S22-S24 have no specific order.

[0110] It should be noted that the tap water and the refrigerant flow in two pipelines of the second heat exchanger 7 respectively, and since the two pipelines are close to each other, the tap water and the refrigerant can exchange heat in the second heat exchanger 7. When the tap water and the refrigerant exchange heat, the greater the flow rate of the tap water, the greater the total amount of tap water that exchanges heat in the second heat exchanger 7, and thus the total heat absorbed by the tap water from the refrigerant is also greater, and the temperature of the refrigerant after heat exchange in the second heat exchanger 7, i.e. the temperature T 冷出 of the refrigerant outlet 71a, will be lower, so that the temperature T 冷出 of the refrigerant outlet 71a is closer to the temperature T 入水 of the cold water inlet 70b. Moreover, since the cold water inlet 70b of the second heat exchanger 7 is close to the refrigerant outlet 71a of the second heat exchanger 7, the refrigerant near the refrigerant outlet 71a exchanges heat with the tap water near the cold water inlet 70b, and the refrigerant near the refrigerant outlet 71a is the final state of the refrigerant in the second heat exchanger 7, and the lower the temperature T 冷出 of the refrigerant outlet 71a, the lower the temperature of the refrigerant flowing to the first heat exchanger 5, and the faster the speed of the refrigerant absorbing heat from the air in the first heat exchanger 5, so that the heat exchange efficiency of the first heat exchanger 5 is higher. Therefore, when the flow rate of the water is greater, the system pressure of the refrigeration cycle is lower, the temperature of the refrigerant in the refrigeration cycle is lower, and the work required by the compressor 4 is also less, so that the overall power consumption of the water-cooled air conditioner 100 is less.

[0111] Of course, when the flow rate of the water is too large, although the temperature of the refrigerant in the refrigeration cycle can be lower, the efficiency of heat exchange between the tap water and the refrigerant is affected by factors such as the temperature difference between the two and the heat exchange time, and when the heat exchange efficiency between the tap water and the refrigerant reaches a certain limit, continuously increasing the flow rate of the water is difficult to effectively improve the heat exchange efficiency between the two.

[0112] Moreover, in order to exchange heat between the tap water and the refrigerant, the tap water and the refrigerant need to have a certain temperature difference. Generally speaking, the greater the temperature difference, the higher the heat exchange efficiency between the tap water and the refrigerant, and the smaller the temperature difference, the lower the heat exchange efficiency between the tap water and the refrigerant. Since the refrigerant near the refrigerant outlet 71a has reached the lowest temperature of the refrigerant in the second heat exchanger 7, the region where the cold water inlet 70b and the refrigerant outlet 71a exchange heat is the region where the temperature difference between the refrigerant and the tap water is the smallest, and it is also the region where the heat exchange efficiency between the refrigerant and the tap water in the second heat exchanger 7 is the lowest. Based on the difference ΔT between the temperature T 冷出 of the refrigerant outlet 71a and the temperature T 入水 of the cold water inlet 70b, it can be determined whether there is an inefficient heat exchange between the tap water and the refrigerant: when the flow rate of the water at the cold water inlet 70b is large, the tap water absorbs more heat from the refrigerant, and the temperature T 冷出lower; when the water flow of the cold water inlet 70b is too large, the value of AT is too low, the heat exchange efficiency of the tap water and the refrigerant is low, and water resources are easily wasted, so the temperature T 冷出 of the refrigerant outlet 71a and the temperature T 入水 of the cold water inlet 70b need to be maintained within a certain range.

[0113] Obviously, the size of the water flow of the cold water inlet 70b is related to the value of AT, so the water-cooled air conditioner 100 of the present disclosure can ensure the heat exchange efficiency of the refrigerant in the refrigeration cycle by controlling the value of AT within a reasonable range, so that the refrigerant can always maintain a high heat exchange efficiency. Moreover, by controlling the value of AT within a reasonable range, the water flow of the cold water inlet 70b can be matched with the running state of the air conditioner, effectively avoiding waste of water resources.

[0114] It should be noted that the first preset temperature T1 and the second preset temperature T2 can be configured according to the specifications and performance of the water-cooled air conditioner 100, so that the first preset temperature T1 and the second preset temperature T2 can be adapted to the specifications of the water-cooled air conditioner 100 and form a reasonable temperature interval. When AT is between the first preset temperature T1 and the second preset temperature T2, that is, the water flow of the cold water inlet 70b is matched with the running frequency of the compressor 4, the refrigerant of the refrigeration cycle is in a high-efficiency heat exchange state, so the water-cooled air conditioner 100 can maintain the current water flow of the cold water inlet 70b.

[0115] When AT is too low, that is, in the case of AT < T2, the temperature difference between the temperature T 冷出 of the refrigerant outlet 71a and the temperature T 入水 of the cold water inlet 70b is too small, the refrigerant and the tap water are in a low-efficiency heat exchange state, and the water flow of the cold water inlet 70b has exceeded the running demand of the water-cooled air conditioner 100, causing waste of water resources. Therefore, in this case, the water-cooled air conditioner 100 can reduce the water inflow of the cold water inlet 70b until AT returns to between the first preset temperature T1 and the second preset temperature T2.

[0116] When AT is too large, that is, in the case of T1 < AT, the temperature difference between the temperature T 冷出 of the refrigerant outlet 71a and the temperature T 入水 of the cold water inlet 70b is large, but the water flow of the cold water inlet 70b is insufficient, the total heat exchange amount of the tap water and the refrigerant is insufficient, and the compressor 4 needs to do extra work to maintain the current refrigeration cycle. Therefore, in this case, the water-cooled air conditioner 100 can increase the water inflow of the cold water inlet 70b until AT returns to between the first preset temperature T1 and the second preset temperature T2.

[0117] Based on the foregoing water-cooled air conditioner 100, as shown in FIG. 16, which is a flowchart of the work performed by the controller 2 in some embodiments of the present disclosure, the controller 2 can be configured to include steps S1-S5:

[0118] S1, circulating the refrigerant between the compressor 4, the second heat exchanger 7, and the first heat exchanger 5 to form a refrigeration cycle, and allowing the external water source to enter the second heat exchanger 7 and exchange heat with the refrigerant in the second heat exchanger 7;

[0119] S2, obtaining the first preset temperature T1, the second preset temperature T2, and making T2 冷出 and the cold water inlet 70b temperature T 入水 , and obtaining the difference AT between the refrigerant outlet 71a temperature T 冷出 and the cold water inlet 70b temperature T 入水 , AT = T 冷出 -T 入水 ;

[0120] S3, in the case of T2≤ AT ≤ T1, maintaining the water inflow of the water-cooled air conditioner 100 at the cold water inlet 70b;

[0121] S4, in the case of AT < T2, reducing the water inflow of the water-cooled air conditioner 100 at the cold water inlet 70b;

[0122] S5, in the case of T1 < AT, increasing the water inflow of the water-cooled air conditioner 100 at the cold water inlet 70b.

[0123] It should be noted that steps S3-S5 have no specific order.

[0124] Based on the above control, the water-cooled air conditioner 100 of the present disclosure can allow the controller 2 to determine whether the water flow of the cold water inlet 70b meets the current refrigeration cycle demand by using the difference AT between the refrigerant outlet 71a temperature T 冷出 and the cold water inlet 70b temperature T 入水 . Of course, the water-cooled air conditioner 100 can adjust the water flow of the cold water inlet 70b by setting operating gears, such as water flow gears C1, C2, C3, etc.

[0125] For example, the water flow gears can be set to C1, C2, C3, and C1 > C2 > C3. When the current operating gear of the water-cooled air conditioner 100 is C2, the controller 2 obtains the refrigerant outlet 71a temperature T 冷出 and the cold water inlet 70b temperature T 入水 , and obtains the difference AT between the refrigerant outlet 71a temperature T 冷出 and the cold water inlet 70b temperature T 入水the difference AT, AT = T 冷出 -T 入水 . And, the controller 2 judges the region where AT is located according to the first preset temperature T1 and the second preset temperature T2: in the case of T2≤AT≤T1, the water-cooled air conditioner 100 is maintained to run at the C2 gear; in the case of AT

[0126] In some embodiments, as shown in FIG. 15, an adjusting device 11 can be arranged upstream of the cold water inlet 70b along the direction of water flow to adjust the flow rate of the cold water inlet 70b. For example, the adjusting device 11 can adopt two valve bodies 11a arranged side by side, and by selectively opening one of the valve bodies 11a or simultaneously starting both of the valve bodies 11a, three gear designs of water flow rate are formed. In this way, the water-cooled air conditioner 100 of the present disclosure can adjust the pipe area accessing the cold water inlet 70b by switching the working state of the valve body 11a to increase or decrease the water inlet of the cold water inlet 70b, so as to conveniently adjust the water flow rate of the cold water inlet 70b based on the AT value.

[0127] It should be noted that when the water-cooled air conditioner 100 is initially started, the compressor 4 has not yet done work or has not yet done complete work, and the temperature T 冷出 of the refrigerant outlet 71a and the temperature T 入水 of the cold water inlet 70b cannot accurately reflect the running state of the refrigeration cycle, such as the running frequency of the compressor 4, the temperature of the refrigerant, etc. Therefore, within a certain period of time after the initial start of the water-cooled air conditioner 100, the water-cooled air conditioner 100 can be first run for a period of time, and then the controller 2 adjusts the water flow rate of the cold water inlet 70b based on the AT value. As a second example of the present disclosure, as shown in FIG. 19, the controller 2 can be configured to include steps S31 to S32:

[0128] Step S31, obtaining a first preset time t1 and a running frequency of the enabled fan 6;

[0129] Step S32, in the case that the water-cooled air conditioner 100 receives a start signal, obtaining the running frequency of the enabled fan 6, and making the fan 6 run at the enabled running frequency, and after the water-cooled air conditioner 100 runs for the first preset time t1, collecting the indoor environment temperature T 环 .

[0130] The first preset time t1 can be configured according to the specifications and performance of the water-cooled air conditioner 100, so that the water-cooled air conditioner 100 can enter a relatively stable running state after running for the first preset time t1. Moreover, the enabled running frequency of the fan 6 can be a running frequency selected by the user, which can be presented in the controller 2 / remote controller in the form of a wind speed gear. Of course, the enabled running frequency of the fan 6 can also be a running frequency set by default by the water-cooled air conditioner 100 itself, for example, the water-cooled air conditioner 100 can enable the fan 6 to run at the maximum running frequency / maximum wind speed gear after receiving the start signal.

[0131] After the water-cooled air conditioner 100 enters the stable running state, the compressor 4 starts to work stably, and the refrigeration cycle formed by the compressor 4, the second heat exchanger 7 and the first heat exchanger 5 starts to run stably. At this time, the water-cooled air conditioner 100 can adjust the water flow of the cold water inlet 70b, so that the water flow of the cold water inlet 70b can automatically match the running frequency of the compressor 4, so that the water-cooled air conditioner 100 enters a high-efficiency running state. As a third example of the present disclosure, as shown in FIG. 20, the controller 2 can be configured to include step S33:

[0132] Step S33, acquiring a second preset time t2; adjusting the water inflow of the cold water inlet 70b according to the collected indoor environment temperature T 环 and the enabled running frequency of the fan 6, so that the water inflow of the cold water inlet 70b matches the enabled running frequency of the fan 6 and the collected indoor environment temperature T 环 , to form initial running parameters; and enabling the water-cooled air conditioner 100 to run at the initial running parameters for the second preset time t2.

[0133] It should be noted that the water inflow of the cold water inlet 70b matches the enabled running frequency of the fan 6 and the collected indoor environment temperature T 环 , which can be configured according to the specifications and performance of the water-cooled air conditioner 100. According to the enabled running frequency of the fan 6 and the indoor environment temperature T 环 , the water inflow of the cold water inlet 70b can match the running frequency of the compressor 4, so that the water-cooled air conditioner 100 enters a high-efficiency running state. Specifically, the controller 2 can be configured to:

[0134] set a plurality of running frequencies of the fan 6, and arrange the plurality of running frequencies in order;

[0135] set a plurality of water inflows of the cold water inlet 70b, and arrange the plurality of water inflows in order, and each water inflow corresponds to each running frequency one by one;

[0136] acquire a first preset environment temperature T 环1 and a second preset environment temperature T 环2 , and make T 环2 T环1 ;

[0137] In the case of T 环1 <T 环 , the water inflow is matched in sequence based on the running frequency of the fan 6 enabled, and the matched water inflow is configured to the second heat exchanger 7;

[0138] In the case of T 环2 ≤T 环 ≤T 环1 , the water inflow is matched in descending order based on the running frequency of the fan 6 enabled, and the matched water inflow is configured to the second heat exchanger 7; and the maximum water inflow obtained is matched as the first limit water inflow in descending order;

[0139] In the case of T 环 <T 环2 , the water inflow is matched in descending order based on the running frequency of the fan 6 enabled, and the matched water inflow is less than the first limit water inflow, and the matched water inflow is configured to the second heat exchanger 7.

[0140] It should be noted that in order to meet the use requirements of users, the water-cooled air conditioner 100 is generally configured with multiple running frequencies of the fan 6, i.e. the speed positions that can be controlled and switched by the user, such as high speed position, medium speed position, low speed position, etc. The wind speeds of different positions are generally arranged in order from high to low or from low to high. Moreover, the water-cooled air conditioner 100 generally also configures multiple water inflows of the cold water inlet 70b based on the flow control requirements of the second heat exchanger 7, i.e. water flow positions, such as C1 position, C2 position, C3 position, etc. The water flows of different positions are also generally arranged in order from high to low or from low to high. Taking the high speed position, the medium speed position, and the low speed position as the wind speed position, and the C1 position, the C2 position, and the C3 position as the water flow position as examples for description, wherein the water flow relationship from high to low of the water flow position is C1>C2>C3.

[0141] In the configuration of the air conditioner, high wind speed generally corresponds to high flow, i.e. the high speed position corresponds to the water flow position C1, the medium speed position corresponds to the water flow position C2, and the low speed position corresponds to the water flow position C3. In this way, as shown in FIG. 21, the controller 2 of the water-cooled air conditioner 100 of the present disclosure can be configured to:

[0142] obtain the first preset environment temperature T 环1 , the second preset environment temperature T 环2 , and make T 环2 <T 环1 ;

[0143] In the case of T 环1 <T 环In the case of T

[0144] In the case of T 环2 ≤ T 环 ≤ T 环1 In the case of T

[0145] In the case of T 环 ≤ T 环2 In the case of T

[0146] It should be noted that the descending order matching refers to the order from high to low along the gear. The running frequency of the fan 6 is not matched to the water flow rate gear corresponding thereto, but is matched to the next water flow rate gear. Taking the foregoing example as an example, when the indoor environment temperature is in the set temperature range, the water inflow is matched to the water flow rate gear C1 when the fan 6 is in the high gear. When the indoor environment temperature is not in the set temperature range, the water inflow is matched to the next water flow rate gear, i.e., the water flow rate gear C2 when the fan 6 is in the high gear.

[0147] It should be noted that in the descending order matching, the water inflow is limited to the minimum value that can be reached by the water flow rate gear. Taking the foregoing example as an example, when the indoor environment temperature is in the set temperature range, the water inflow is matched to the water flow rate gear C3 when the fan 6 is in the low gear. When the indoor environment temperature is not in the set temperature range, the water inflow is matched to the next water flow rate gear, i.e., the water flow rate gear C3 when the fan 6 is in the low gear.

[0148] Moreover, it should be noted that the aforementioned wind speed gears adopt high-speed gear, medium-speed gear and low-speed gear, and the water flow gears adopt C1 gear, C2 gear and C3 gear, which are only examples for illustration in the embodiments of the present disclosure. The water-cooled air conditioner 100 can be configured with more wind speed gears and water flow gears or adopt stepless speed regulation according to its own specification design and performance requirements.

[0149] Based on the configuration of the aforementioned controller 2, the water-cooled air conditioner 100 of the present disclosure can control the second heat exchanger 7 to match an appropriate water flow when the compressor 4 starts, according to the indoor environment corresponding to the water-cooled air conditioner 100, so that the air conditioner system can quickly enter a high-efficiency running state. In this way, the compressor 4 can enter a stable running state after starting, the refrigerant can always maintain a high-efficiency heat exchange state, and the water flow of the cold water inlet 70b can be matched with the running state of the air conditioner, effectively avoiding waste of water resources.

[0150] The first heat exchanger 5 is the condenser of the water-cooled air conditioner 100 of the present disclosure, and the first heat exchanger 5 may, when the water-cooled air conditioner 100 is running for a long time, have a local temperature that is too low. In this case, the air pipe of the first heat exchanger 5 is prone to icing, which causes the water-cooled air conditioner 100 to run abnormally. Therefore, when the water-cooled air conditioner 100 is running, the temperature of the first heat exchanger 5 can be monitored to avoid the aforementioned situation. As shown in FIG. 22, as a fourth example of the present disclosure, the controller 2 can be configured to include steps S34-S36:

[0151] Step S34, obtaining a first preset air pipe temperature T 内1 , a second preset air pipe temperature T 内2 and a temperature T 内盘 of the first heat exchanger 5, and making T 内2 T 内1 ;

[0152] Step S35, in the case of T 内盘 T 内1 , making the water-cooled air conditioner 100 reduce the water inflow of the cold water inlet 70b;

[0153] Step S36, in the case of T 内盘 T 内2 , making the compressor 4 stop running.

[0154] It should be noted that the first preset air pipe temperature T 内1 and the second preset air pipe temperature T 内2 are two warning temperatures of the first heat exchanger 5. When the temperature T 内盘 of the first heat exchanger 5 reaches the first preset air pipe temperature T 内1At this time, there is a certain risk of icing on the surface of the first heat exchanger 5. Therefore, the controller 2 can reduce the water flow rate at the cold water inlet 70b of the water-cooled air conditioner 100. Taking speed control as an example, the water flow rate speed at the cold water inlet 70b can be reduced by one or more speeds to increase the pressure of the refrigeration cycle unit, thereby increasing the temperature T of the first heat exchanger 5. 内盘 And, if the temperature T of the first heat exchanger 5... 内盘 The temperature remains below the first preset duct temperature T. 内1 At this time, controller 2 can continuously reduce the amount of cold water entering the water-cooled air conditioner 100 through the cold water inlet 70b until the amount of cold water entering the cold water inlet 70b drops to the minimum value that the system can operate at. Meanwhile, at the temperature T of the first heat exchanger 5... 内盘 Reaching the second preset duct temperature T 内2 At this time, the surface of the first heat exchanger 5 is at high risk of icing, so the controller 2 will stop the compressor 4 to prevent the refrigeration cycle unit from icing. At this time, because the temperature of the first heat exchanger 5 is very low, the fan 6 can continue to run at the currently activated operating frequency to continuously output cold air and maintain the temperature regulation of the indoor environment.

[0155] Of course, after the compressor 4 stops running for a period of time, the temperature T of the first heat exchanger 5 will... 内盘 It will rise back to the second preset duct temperature T 内 Therefore, controller 2 can also be configured to: acquire a third preset time t3; at T 内盘 <T 内2 In this case, the fan 6 is kept running at the current operating frequency, and the compressor 4 is stopped for a third preset time t3 before restarting to maintain the effective operating time of the refrigeration cycle unit.

[0156] In the water-cooled air conditioner 100, the temperature of the refrigerant and the temperature of the hot water output by the second heat exchanger 7 are mutually influential. As the water-cooled air conditioner 100 operates, if the user-set temperature is low, there will be more heat exchange between the refrigerant and the tap water. Consequently, the temperature of the hot water output by the second heat exchanger 7 will also increase. To prevent the user from being scalded by excessively high hot water output by the second heat exchanger 7, as shown in Figure 23, as a fifth example of this disclosure, the controller 2 can also be configured to include steps S37-S34:

[0157] Step S37, obtain the first preset outlet water temperature T 出1 Second preset outlet water temperature T 出2 and the temperature T of hot water outlet 71b 出水 and make T 出2 <T 出1 ;

[0158] Step S38, in T 出2 <T出水 <T 出1 In this case, the water-cooled air conditioner 100 reduces the amount of cold water entering through the cold water inlet 70b;

[0159] Step S39, in T 出水 <T 出2 In this case, the water-cooled air conditioner 100 maintains the water inlet flow rate of the cold water inlet 70b;

[0160] Step S40, in T 出水 >T 出1 In this case, compressor 4 will stop running.

[0161] By monitoring the temperature T of the hot water outlet 71b of the second heat exchanger 7 出水 This water-cooled air conditioner 100 can adjust the temperature T of the hot water outlet 71b by regulating the inflow of cold water into the cold water inlet 70b. 出水 At higher temperatures, the inflow rate of cold water at inlet 70b increases, thereby increasing the temperature T at hot water outlet 71b. 出水 reduce.

[0162] Furthermore, if the temperature T of the hot water outlet 71b 出水 The water temperature remains consistently higher than the first preset outlet temperature T. 出1 At this time, controller 2 can continuously increase the water flow rate at the cold water inlet 70b of the water-cooled air conditioner 100 until the water flow rate at the cold water inlet 70b drops to the maximum value that the system can operate at. Meanwhile, the temperature T at the hot water outlet 71b... 出水 Reaching the second preset water outlet temperature T 出2 At that time, the hot water output by the second heat exchanger 7 was at a very high temperature, posing a significant risk of scalding to the user. Therefore, the controller 2 would stop the compressor 4 from running.

[0163] Of course, after the compressor 4 stops running for a period of time, the temperature T_outlet of the hot water outlet 71b will drop below the second preset outlet temperature T_outlet2. Therefore, the controller 2 can also be configured to include step S41:

[0164] Step S41, obtain the third preset time t3; at T 出水 >T 出1 In this case, the fan 6 is kept running at the current operating frequency, and the compressor 4 is stopped for a third preset time t3 before restarting.

[0165] It should be noted that the temperature parameters involved in this embodiment can be obtained by arranging temperature sensors 103 at the corresponding temperatures, and the collected temperature information can be transmitted to the controller 2 through the temperature sensors 103.

[0166] It should be noted that the process sequence shown in Figure 23 is not the only sequence that controller 2 can execute. Depending on the application scenario of the water-cooled air conditioner 100, controller 2 can adjust and analyze the indoor ambient temperature T. 环 The temperature of the first heat exchanger is 5T. 内盘 Hot water outlet temperature T 出水 Refrigerant outlet temperature 71a T 冷出 and cold water inlet temperature 70bT 入水 The order of the difference △T is used to form a new logical execution order.

[0167] In conjunction with the above embodiments, the water-cooled air conditioner 100 of this disclosure, by setting a second heat exchanger 7 and a first heat exchanger 5, utilizes water and refrigerant for heat exchange to meet the dual needs of a kitchen environment for both cold air and hot water. Furthermore, the greater the inflow of cold water into the cold water inlet 70b, the greater the total amount of water undergoing heat exchange in the second heat exchanger 7. During heat exchange, the water absorbs more heat from the refrigerant, resulting in a lower refrigerant temperature output from the refrigerant outlet 71a after heat exchange in the second heat exchanger 7. Moreover, the proximity of the cold water inlet 70b and the refrigerant outlet 71a allows for heat exchange between the water and refrigerant near these locations, thus lowering the temperature T at the refrigerant outlet 71a. 冷出 and cold water inlet temperature 70bT 入水 The difference ΔT can effectively reflect the water flow rate at the chilled water inlet 70b of the water-cooled air conditioner 100. This is achieved by measuring the refrigerant outlet temperature T at the refrigerant outlet 71a. 冷出 and cold water inlet temperature 70bT 入水 The difference ΔT is limited to a suitable range, so that the water-cooled air conditioner 100 of this disclosure can control the water flow rate of the cold water inlet 70b. The water-cooled air conditioner 100 can maintain a suitable water flow rate during operation, ensuring that the heat exchange efficiency of the refrigeration cycle is in the high-efficiency range and avoiding water waste.

[0168] Furthermore, the water-cooled air conditioner 100 disclosed herein can collect the required temperature parameters and control the water flow during the operation of the water-cooled air conditioner 100 based on these temperature parameters, so that the water-cooled air conditioner 100 can achieve antifreeze protection, prevent the outlet water temperature from being too high, and match the appropriate water flow to the second heat exchanger 7 after the compressor 4 starts, so that the water-cooled air conditioner 100 can quickly enter a state of high-efficiency operation.

[0169] In a related water-cooled air conditioner, as shown in Figure 24, the water-cooled air conditioner 100 may include a compressor 4, a second heat exchanger 7, and a first heat exchanger 5. The compressor 4 may be connected to the second heat exchanger 7 and the first heat exchanger 5 respectively.

[0170] In some embodiments, as shown in FIG. 24, the compressor 4 can be used to compress the refrigerant. The compressor 4 can be used to compress the refrigerant at low temperature and low pressure into refrigerant at high temperature and high pressure, and then transmit the refrigerant at high temperature and high pressure to the second heat exchanger 7.

[0171] For example, the compressor 4 can include, but is not limited to, scroll compressor, rotary compressor, screw compressor, etc.

[0172] In some embodiments, as shown in FIG. 24, the second heat exchanger 7 can be used to exchange heat between the refrigerant and water. For example, the second heat exchanger 7 can function as a condenser, cold water can be transmitted to the second heat exchanger 7 through the water inlet pipe 122 of the second heat exchanger 7, the cold water absorbs heat from the high-temperature refrigerant in the second heat exchanger 7, the water output from the second heat exchanger 7 is at high temperature, and is output through the water outlet pipe 124. The refrigerant releasing heat in the second heat exchanger 7 is transmitted to the first heat exchanger 5.

[0173] In some embodiments, as shown in FIG. 24, the water-cooled air conditioner 100 can further include a throttling device 14. The throttling device 14 can be connected with the second heat exchanger 7 and the first heat exchanger 5 respectively. The throttling device 14 can be used to adjust the flow of the refrigerant, and can function as throttling and pressure reduction. The refrigerant releasing heat in the second heat exchanger 7 can become refrigerant at low temperature and low pressure after passing through the throttling device 14. For example, the throttling device 14 can include, but is not limited to, electronic expansion valve, thermal expansion valve, etc.

[0174] In some embodiments, as shown in FIG. 24, the first heat exchanger 5 can be used to exchange heat between the refrigerant and air. For example, the first heat exchanger 5 can function as an evaporator, the refrigerant at low temperature and low pressure transmitted to the first heat exchanger 5 can absorb heat from the air in the first heat exchanger 5, and then is transmitted back to the compressor 4, the air in the first heat exchanger 5 is cooled to become cold air and is transmitted to the indoor.

[0175] The compressor 4 can compress the gaseous refrigerant at low temperature and low pressure into gaseous refrigerant at high temperature and high pressure, and transmit the gaseous refrigerant at high temperature and high pressure to the second heat exchanger 7, the gaseous refrigerant at high temperature and high pressure releases heat in the second heat exchanger 7, and then becomes liquid refrigerant at low temperature and low pressure through the throttling device 14. The liquid refrigerant at low temperature and low pressure is transmitted to the first heat exchanger 5, the refrigerant in the first heat exchanger 5 absorbs heat from the air to become gaseous refrigerant at low temperature and low pressure, and then returns to the compressor 4.

[0176] The second heat exchanger 7 of the water-cooled air conditioner 100 can output hot water, and the first heat exchanger 5 can output cold air, so as to provide cold air and hot water at the same time, and meet the use requirements of users.

[0177] When the temperature of the cold water entering the second heat exchanger 7 is low, the evaporation pressure of the refrigerant circulation system is too low and the evaporation temperature of the refrigerant circulation system is too low (for example, lower than 0°C) due to the high heat exchange efficiency of the second heat exchanger 7, and the surface of the first heat exchanger 5 produces condensate after the air is cooled. As the amount of ice increases, the contact area of the first heat exchanger 5 with the air decreases, the heat absorbed by the refrigerant from the air also decreases, the refrigerant evaporation is incomplete, and the overall temperature of the refrigerant circulation system gradually decreases.

[0178] For the case of ice formation on the surface of the first heat exchanger 5, the following problems may occur:

[0179] 1. After the surface of the first heat exchanger 5 is iced, ice debris may be blown out by the wind, affecting the user's experience.

[0180] 2. The heat absorbed by the refrigerant in the first heat exchanger 5 from the air decreases, reducing the heat exchange efficiency of the first heat exchanger 5.

[0181] 3. Incomplete evaporation of the refrigerant in the first heat exchanger 5 may cause liquid refrigerant to enter the compressor, causing the compressor to fail or malfunction, resulting in the water-cooled air conditioner 100 being unable to normally output cold air and hot water, and seriously affecting the normal use of the water-cooled air conditioner 100.

[0182] 4. When the overall temperature and / or pressure of the refrigerant circulation system is too low, the heat absorbed by the second heat exchanger 7 from the water is insufficient, and the output water temperature cannot meet the user's demand for hot water.

[0183] For traditional air conditioners, frost prevention is usually achieved by directly adjusting the compressor, without considering the user's demand for hot water. Therefore, how to reduce the risk of ice formation on the surface of the heat exchanger of the air conditioner and enable the air conditioner to output hot water that meets the user's demand has become a technical problem to be solved.

[0184] To solve the above technical problems, in some embodiments of the present disclosure, an air conditioner anti-frost method, an air conditioner anti-frost device, a water-cooled air conditioner, and a computer readable storage medium are provided, which can effectively reduce the risk of ice formation on the surface of the heat exchanger of the air conditioner and meet the user's demand for hot water, improving the stability of the air conditioner operation.

[0185] In some embodiments of the present disclosure, as shown in FIG. 25A, the water-cooled air conditioner 100 can include a compressor 4, a second heat exchanger 7, and a first heat exchanger 5. The compressor 4 can be used to compress the refrigerant. The second heat exchanger 7 can be used to exchange heat between the refrigerant and the water. The first heat exchanger 5 can be used to exchange heat between the refrigerant and the air.

[0186] In some embodiments, the water-cooled air conditioner 100 can further comprise a throttling device 14. The compressor 4, the second heat exchanger 7, the throttling device 14 and the first heat exchanger 5 can be described with reference to the above description of the related parts in FIG. 24, which will not be repeated here.

[0187] In some embodiments, as shown in FIG. 25A, the water-cooled air conditioner 100 can comprise a water amount control unit 170. The water amount control unit 170 can be arranged on the water inlet pipe 122 of the second heat exchanger 7. The water amount control unit 170 can be used to control the water amount of the second heat exchanger 7. For example, the water amount control unit 170 can include, but is not limited to, a water amount control valve (such as a solenoid valve) and the like.

[0188] In some embodiments, as shown in FIG. 25A, the first temperature sensor 150 can be arranged on the coil of the first heat exchanger 5. The first temperature sensor 150 can be used to collect the corresponding coil temperature of the first heat exchanger 5.

[0189] In some embodiments, as shown in FIG. 25A, the second temperature sensor 160 can be arranged on the water outlet pipe 124 of the second heat exchanger 7. The second temperature sensor 160 can be used to collect the corresponding water outlet temperature of the second heat exchanger 7.

[0190] In some embodiments, as shown in FIG. 25A and FIG. 33, the water-cooled air conditioner 100 can further comprise a controller 2. The controller can be used to control the operation of the water-cooled air conditioner 100. The controller 2 can be connected with the compressor 4, the first temperature sensor 150, the second temperature sensor 160 and the water amount control unit 170, etc.

[0191] For the refrigerant circulation system, when the state of the throttling device 14 is constant, the higher the frequency of the compressor 4, the higher the temperature of the refrigerant input to the second heat exchanger 7, and the faster the flow rate of the refrigerant. Therefore, the more heat absorbed by the water in the second heat exchanger 7, the higher the water outlet temperature of the second heat exchanger 7, the lower the temperature and pressure of the refrigerant after the throttling device 14, and the lower the evaporation temperature of the system, resulting in a lower surface temperature of the first heat exchanger 5 and a higher risk of icing.

[0192] When the state of the throttling device 14 is constant, the greater the water amount of the second heat exchanger 7, the higher the heat transfer efficiency of the second heat exchanger 7, the more heat transferred from the refrigerant to the water in the second heat exchanger 7, and the lower the temperature of the refrigerant after the throttling device 14, and the lower the evaporation temperature of the system, resulting in a lower surface temperature of the first heat exchanger 5 and a higher risk of icing.

[0193] That is, the higher the frequency of the compressor 4, the higher the risk of icing on the surface of the first heat exchanger 5, and the higher the water outlet temperature of the second heat exchanger 7. The lower the frequency of the compressor 4, the lower the risk of icing on the surface of the first heat exchanger 5, and the lower the water outlet temperature of the second heat exchanger 7.

[0194] The water inlet amount of the second heat exchanger 7 increases, the icing risk of the surface of the first heat exchanger 5 increases, and the outlet water temperature of the second heat exchanger 7 decreases. The water inlet amount of the second heat exchanger 7 decreases, the icing risk of the surface of the first heat exchanger 5 decreases, and the outlet water temperature of the second heat exchanger 7 increases.

[0195] For example, the effects of the frequency of the compressor 4 and the water inlet amount of the second heat exchanger 7 on the icing risk of the surface of the first heat exchanger 5 and the outlet water temperature of the second heat exchanger 7 can be as shown in Table 1.

[0196] Table 1

[0197] Based on the effects of the frequency of the compressor 4 and the water inlet amount of the second heat exchanger 7 on the icing risk of the surface of the first heat exchanger 5 and the outlet water temperature of the second heat exchanger 7 described above, the icing risk of the surface of the first heat exchanger 5 can be reduced by adjusting the frequency of the compressor 4 and the water inlet amount of the second heat exchanger 7, and the outlet water temperature of the second heat exchanger 7 can be considered at the same time.

[0198] In some embodiments of the present disclosure, as shown in FIG. 26, the controller can acquire the coil temperature collected by the first temperature sensor 150 and acquire the outlet water temperature collected by the second temperature sensor 160. In a case where the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, the compressor 4 can be controlled to perform a frequency adjustment operation and the water amount control unit 170 can be controlled to perform a water amount adjustment operation according to the coil temperature and the outlet water temperature, so as to increase the coil temperature of the first heat exchanger 5 and make the outlet water temperature of the second heat exchanger 7 tend to the target outlet water temperature interval. Therefore, the icing risk of the surface of the heat exchanger of the water-cooled air conditioner can be effectively reduced, the demand of the user for hot water can be met, and the stability of the air conditioner operation is improved.

[0199] In some embodiments, as shown in FIG. 25B, the water-cooled air conditioner 100 can further include a drainage device 9. The drainage device 9 can be connected with the output end of the second heat exchanger 7.

[0200] In some embodiments, as shown in FIG. 25B, the water-cooled air conditioner 100 can further include a hot water outlet 190. The hot water outlet 190 can be arranged at the end of the outlet pipeline 124 of the second heat exchanger 7. The user can select to open the hot water outlet 190 or close the hot water outlet 190 according to the own demand.

[0201] In a case where the hot water outlet 190 is opened, the drainage device 9 can be closed, and the water output by the second heat exchanger 7 is output through the hot water outlet 190. In a case where the user has a demand for hot water, the water output by the second heat exchanger 7 can be output to the user through the hot water outlet 190 for use.

[0202] When the hot water outlet 190 is closed, the drain device 9 is opened, and the water output by the second heat exchanger 7 can be output through the drain device 9. When the user does not have a demand for using hot water, the water output by the second heat exchanger 7 can be drained from the unit through the drain device 9, thereby meeting the two demands of the user for using hot water and not using hot water.

[0203] In some embodiments, as shown in FIG. 25B, the drain device 9 can be connected with a controller. The controller can detect the opening and closing state of the hot water outlet 190 and control the drain device 9 to be closed or opened according to the opening and closing state of the hot water outlet 190.

[0204] In some embodiments, as shown in FIG. 25B, the drain device 9 can be used to be in a closed state when the pipeline pressure of the water outlet pipeline 124 of the second heat exchanger 7 is less than the corresponding drain pressure of the drain device 9. The drain device 9 can be used to be in an opened state when the pipeline pressure of the water outlet pipeline of the second heat exchanger 7 is greater than the corresponding drain pressure of the drain device 9.

[0205] For example, the drain device 9 can be a pressure-triggered drain device. The drain device 9 can include a pressure switch valve. When the hot water outlet 190 is opened, the water output by the second heat exchanger 7 can be output to the user through the hot water outlet 190 for use, and therefore, the pipeline pressure of the water outlet pipeline 124 of the second heat exchanger 7 is small. When the pressure switch valve detects that the pipeline pressure of the water outlet pipeline 124 of the second heat exchanger 7 is less than the corresponding drain pressure of the drain device 9, the pressure switch valve can be in a closed state, so that the water output by the second heat exchanger 7 is not drained from the unit through the drain device 9.

[0206] When the hot water outlet 190 is closed, the water output by the second heat exchanger 7 is not output through the hot water outlet 190, and as the amount of water output by the second heat exchanger 7 increases, the pipeline pressure of the water outlet pipeline 124 of the second heat exchanger 7 also increases. When the pressure switch valve detects that the pipeline pressure of the water outlet pipeline 124 of the second heat exchanger 7 is greater than the corresponding drain pressure of the drain device 9, the pressure switch valve can be in an opened state, so that the water output by the second heat exchanger 7 can be drained from the unit through the drain device 9.

[0207] By using the pressure-triggered drain device, the drain device can be controlled to be closed or opened according to the pipeline pressure, and the controller does not need to additionally control the drain device, so that the control mode is simpler and faster.

[0208] In some embodiments, as shown in FIG. 25B, the water-cooled air conditioner 100 can further include a fan 6, which can be used to promote the circulation of air in the first heat exchanger 5.

[0209] [Corrected according to Rule 91 02.04.2025] It should be noted that FIG. 25A and FIG. 25B are only used for exemplary description of the structure of the water-cooled air conditioner 100, and are not used to limit the specific structure of the water-cooled air conditioner 100. The water-cooled air conditioner 100 can include more or fewer structural components than FIG. 25A and FIG. 25B.

[0210] As shown in FIG. 26, in some embodiments, the present disclosure provides an air conditioner anti-freezing method, which can be applied to the above-mentioned water-cooled air conditioner. The method can include the following steps:

[0211] Step 310: collecting the coil temperature corresponding to the first heat exchanger by the first temperature sensor.

[0212] The coil temperature corresponding to the first heat exchanger can refer to the temperature of the coil of the first heat exchanger, which can be used to represent the surface temperature of the first heat exchanger. When the coil temperature corresponding to the first heat exchanger is high, it indicates that the surface temperature of the first heat exchanger is high, and there is no or low risk of icing on the surface of the first heat exchanger. When the coil temperature corresponding to the first heat exchanger is low, it indicates that the surface temperature of the first heat exchanger is low, and the risk of icing on the surface of the first heat exchanger is high.

[0213] In some embodiments, the controller of the air conditioner can control the first temperature sensor to collect the coil temperature corresponding to the first heat exchanger at a preset time period. After the first temperature sensor collects the coil temperature, it can send the collected coil temperature to the controller.

[0214] It should be noted that the preset time period can be set according to actual needs, which is not limited herein. For example, 5 minutes or 10 minutes, etc. can be a time period, and the first temperature sensor can collect the coil temperature corresponding to the first heat exchanger every 5 minutes or 10 minutes, etc.

[0215] Since the coil temperature corresponding to the first heat exchanger will not change greatly in a very short time, the first temperature sensor can be controlled to collect the coil temperature corresponding to the first heat exchanger at a preset time period, which can avoid unnecessary power loss caused by the first temperature sensor collecting the coil temperature too frequently.

[0216] Step 320: collecting the water outlet temperature corresponding to the second heat exchanger by the second temperature sensor.

[0217] The water outlet temperature corresponding to the second heat exchanger refers to the temperature of the water output by the second heat exchanger.

[0218] In some embodiments, the controller of the air conditioner can also control the second temperature sensor to collect the water outlet temperature corresponding to the second heat exchanger at a preset time period. After the second temperature sensor collects the water outlet temperature, it can send the collected water outlet temperature to the controller.

[0219] In 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 the frequency adjustment operation and the water amount control unit is controlled to perform the water amount adjustment 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.

[0220] In some embodiments, the first temperature threshold and the second temperature threshold corresponding to the coil temperature can be pre-configured. The first temperature threshold can be less than the second temperature threshold. The second temperature threshold can be a temperature value for judging whether the surface of the first heat exchanger has a risk of icing. The first temperature threshold can be a temperature value for judging whether the risk of icing of the surface of the first heat exchanger is high.

[0221] In some embodiments, 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℃ or a temperature value close to 0℃; and the second temperature threshold can be a larger temperature value such as 9℃, 10℃ or 12℃, but is not limited thereto.

[0222] The controller of the air conditioner can compare the coil temperature collected by the first temperature sensor with the first temperature threshold to judge 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 first heat exchanger is very low, and it can be determined that the surface of the first heat exchanger has a high risk of icing.

[0223] The controller of the air conditioner can compare the coil temperature collected by the first temperature sensor with the second temperature threshold to judge 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 first heat exchanger is relatively high, and it can be determined that the surface of the first heat exchanger does not have a risk of icing.

[0224] 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 first heat exchanger is not particularly low but also not high, and it can be determined that the surface of the first heat exchanger has a certain risk of icing, for example, it can be determined that the surface of the first heat exchanger has a low or moderate risk of icing.

[0225] 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 the controller 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 comparisons can be performed simultaneously, and the time sequence relationship of the temperature comparison is not limited herein.

[0226] In a case that the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, the surface of the first heat exchanger has a certain icing risk but the icing risk is not particularly high, the controller can control the compressor to perform a frequency adjustment operation and control the water amount control unit to perform a water amount adjustment operation according to the coil temperature collected by the first temperature sensor and the outlet water temperature collected by the second temperature sensor.

[0227] The frequency adjustment operation can refer to an operation of controlling the frequency of the compressor. The frequency adjustment operation can include, but is not limited to, any one of the following operations: increasing the frequency of the compressor, decreasing the frequency of the compressor, prohibiting the frequency of the compressor from being increased, and prohibiting the frequency of the compressor from being decreased.

[0228] The water amount adjustment operation can refer to an operation of controlling the water inlet amount of the second heat exchanger. The water amount adjustment operation can include, but is not limited to, any one of the following operations: decreasing the water inlet amount of the second heat exchanger, increasing the water inlet amount of the second heat exchanger, prohibiting the water inlet amount of the second heat exchanger from being decreased, and prohibiting the water inlet amount of the second heat exchanger from being increased.

[0229] In some embodiments, as shown in FIG. 26, the controller can generate a first control instruction and a second control instruction according to the coil temperature and the outlet water temperature, send the first control instruction to the compressor, and send the second control instruction to the water amount control unit. The compressor can perform the frequency adjustment operation according to the first control instruction. The water amount control unit can perform the water amount adjustment operation according to the second control instruction.

[0230] Based on the frequency of the compressor and the water inlet amount of the second heat exchanger shown in Table 1, the influence of the icing risk of the surface of the first heat exchanger and the outlet water temperature of the second heat exchanger, by controlling the frequency of the compressor and the water inlet amount of the second heat exchanger, the coil temperature can be increased to reduce the icing risk of the surface of the risk heat exchange device, and the outlet water temperature of the second heat exchanger can also be adjusted to make the outlet water temperature tend to the target outlet water temperature range.

[0231] The target outlet water temperature range can refer to a water temperature range that is more suitable for users to use, for example, can be 35℃-42℃, 38℃-40℃, etc., but is not limited thereto.

[0232] The water outlet temperature tends to the target water outlet temperature range, which means that the water outlet temperature is closer to the target water outlet temperature range, and in the best case, the water outlet temperature is in the target water outlet temperature range. When the water outlet temperature is higher than the target water outlet temperature range, that is, the water outlet temperature is greater than the maximum temperature of the target water outlet temperature range, the water outlet temperature can be lowered so that the water outlet temperature tends to the target water outlet temperature range. When the water outlet temperature is lower than the target water outlet temperature range, that is, the water outlet temperature is less than the minimum temperature of the target water outlet temperature range, the water outlet temperature can be raised so that the water outlet temperature tends to the target water outlet temperature range. When the water outlet temperature is in the target water outlet temperature range, the water outlet temperature can be maintained unchanged or slightly increased or decreased, and the water outlet temperature continues to be in the target water outlet temperature range.

[0233] For example, when the coil temperature is low and the icing risk is high, the frequency of the compressor can be reduced, and the water inlet amount of the second heat exchanger can be reduced, so that the coil temperature can be increased, and the icing risk of the surface of the risk heat exchange device can be reduced.

[0234] For another example, when the coil temperature is low and the icing risk is high, if the water outlet temperature of the second heat exchanger is higher than the target water outlet temperature range, the frequency of the compressor can be reduced, and the water inlet amount of the second heat exchanger can be prohibited from being increased, so that the water outlet temperature can be reduced while the coil temperature is increased, and the water outlet temperature tends to the target water outlet temperature range.

[0235] In some embodiments of the present disclosure, the water-cooled air conditioner collects the coil temperature corresponding to the first heat exchanger through the first temperature sensor, and collects the water outlet temperature corresponding to the second heat exchanger through the second temperature sensor. When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, it indicates that the surface of the first heat exchanger has a certain icing risk. Then, the frequency adjustment operation of the compressor and the water amount adjustment operation of the water amount control unit can be controlled according to the coil temperature and the water outlet temperature, so that the coil temperature can be increased by adjusting and controlling the frequency of the compressor and adjusting and controlling the water inlet amount of the second heat exchanger, thereby effectively reducing the icing risk of the surface of the heat exchanger of the air conditioner, and the water outlet temperature of the second heat exchanger tends to the target water outlet temperature range, so that the user's demand for hot water can be met, and the stability of the air conditioner operation is improved.

[0236] As shown in FIG. 27, in another embodiment of the present disclosure, an air conditioner anti-icing method is provided, which can include the following steps:

[0237] Step 402: Collecting the coil temperature corresponding to the first heat exchanger through the first temperature sensor.

[0238] Step 404: Collecting the water outlet temperature corresponding to the second heat exchanger through the second temperature sensor.

[0239] The description of steps 402-404 can refer to the description of steps 310-320 in the above embodiments, which will not be repeated here.

[0240] Step 406, when the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, the first outlet water temperature interval in which the outlet water temperature is determined.

[0241] In some embodiments, a plurality of outlet water temperature intervals can be pre-configured, and different outlet water temperature intervals can be used to characterize the temperature of the water output by the second heat exchanger. For example, a high water temperature interval, a medium water temperature interval, and a low water temperature interval can be pre-configured, the high water temperature interval can be greater than 48℃, the medium water temperature interval can be 32℃-48℃, and the low water temperature interval can be less than 32℃, or the high water temperature interval can be greater than 45℃, the medium water temperature interval can be 35℃-45℃, and the low water temperature interval can be less than 35℃, etc., but not limited to this, each outlet water temperature interval can be flexibly configured according to actual needs.

[0242] When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, it indicates that there is a certain icing risk on the surface of the first heat exchanger, but the icing risk is not particularly high. Therefore, the outlet water temperature of the second heat exchanger can be considered at the same time to meet the user's demand for hot water. The first outlet water temperature interval in which the current outlet water temperature of the second heat exchanger is determined, and the frequency of the compressor and the water inlet amount of the second heat exchanger are controlled and adjusted according to the coil temperature and the first outlet water temperature interval, so as to reduce the icing risk while meeting the user's demand for hot water.

[0243] In some embodiments, a plurality of temperature thresholds corresponding to the outlet water temperature can be pre-configured. Taking 3 outlet water temperature intervals 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 for determining whether the outlet water temperature of the second heat exchanger is too low, and the fifth temperature threshold can be a temperature value for determining whether the outlet water temperature of the second heat exchanger is too high; wherein the first temperature interval can be less than or equal to the fourth temperature threshold, the second temperature interval can be greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, and the third temperature interval can be greater than the fifth temperature threshold, etc., but not limited to this.

[0244] The controller of the air conditioner can compare the current outlet water temperature of the second heat exchanger with a plurality of pre-configured temperature thresholds, and determine a first outlet water temperature interval in which the outlet water temperature is located. For example, if the current outlet water temperature of the second heat exchanger is less than or equal to the fourth temperature threshold, the first outlet water temperature interval in which the outlet water temperature is located is the first temperature interval; if the current outlet water temperature of the second heat exchanger is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the first outlet water temperature interval in which the outlet water temperature is located is the second temperature interval; if the current outlet water temperature of the second heat exchanger is greater than the fifth temperature threshold, the first outlet water temperature interval in which the outlet water temperature is located is the third temperature interval, and the like, but not limited thereto.

[0245] It should be noted that the specific temperature values and the number of the plurality of temperature thresholds can be set according to actual needs, which are not limited herein.

[0246] At step 408, according to the coil temperature and the first outlet water temperature interval, the compressor is controlled to perform frequency adjustment operation and the water amount control unit is controlled to perform water amount adjustment operation, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature interval.

[0247] The relationship between the first outlet water temperature interval in which the outlet water temperature of the second heat exchanger is located and the target outlet water temperature interval can be determined, and according to the relationship and the coil temperature, the compressor is controlled to perform frequency adjustment operation and the water amount control unit is controlled to perform water amount adjustment operation.

[0248] The relationship between the first outlet water temperature interval in which the outlet water temperature of the second heat exchanger is located and the target outlet water temperature interval can be determined, and according to the relationship and the coil temperature, the compressor is controlled to perform frequency adjustment operation and the water amount control unit is controlled to perform water amount adjustment operation.

[0249] The relationship between the first outlet water temperature interval in which the outlet water temperature of the second heat exchanger is located and the target outlet water temperature interval can be determined, and according to the relationship and the coil temperature, the compressor is controlled to perform frequency adjustment operation and the water amount control unit is controlled to perform water amount adjustment operation.

[0250] The relationship between the first outlet water temperature interval in which the outlet water temperature of the second heat exchanger is located and the target outlet water temperature interval can be determined, and according to the relationship and the coil temperature, the compressor is controlled to perform frequency adjustment operation and the water amount control unit is controlled to perform water amount adjustment operation.

[0251] In some embodiments, as shown in FIG. 28, the step of controlling the compressor to perform frequency adjustment operation and the water amount control unit to perform water amount adjustment operation according to the coil temperature and the first outlet water temperature interval can include steps 502-504.

[0252] 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 amount control unit is controlled to perform a first water amount adjustment operation according to the first outlet water temperature interval.

[0253] If 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 amount control unit is controlled to perform a second water amount adjustment operation according to the first outlet water temperature interval.

[0254] In some embodiments, in order to achieve more accurate anti-freezing protection and water temperature adjustment effects, the icing risk of the surface of the first heat exchanger can be divided into four risk levels. For example, in addition to the first temperature threshold and the second temperature threshold corresponding to the coil temperature being pre-configured, a third temperature threshold corresponding to the coil temperature can also be configured. The third temperature threshold can be greater than the first temperature threshold and less than the second temperature threshold.

[0255] If the coil temperature of the first heat exchanger is less than or equal to the first temperature threshold, the icing risk of the surface of the first heat exchanger is considered to be high. If the coil temperature of the first heat exchanger is greater than the first temperature threshold and less than or equal to the third temperature threshold, the icing risk of the surface of the first heat exchanger is considered to be medium. If the coil temperature of the first heat exchanger is greater than the third temperature threshold and less than or equal to the second temperature threshold, the icing risk of the surface of the first heat exchanger is considered to be low. If the coil temperature of the first heat exchanger is greater than the second temperature threshold, the icing risk of the surface of the first heat exchanger is considered to be no risk.

[0256] Different control strategies can be adopted for different levels of icing risk to control and adjust the frequency of the compressor and the water amount of the second heat exchanger.

[0257] If the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the first control strategy can be adopted for the medium risk of the surface of the first heat exchanger. If the coil temperature is greater than the third temperature threshold and less than or equal to the second temperature threshold, the second control strategy can be adopted for the low risk of the surface of the first heat exchanger.

[0258] The first control strategy is different from the second control strategy. For example, for the same temperature interval of the outlet water temperature, at least one of the frequency adjustment operation and the water amount adjustment operation is different between the first control strategy and the second control strategy.

[0259] In a case where the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the controller can control the compressor to perform a first frequency adjustment operation and control the water amount control unit to perform a first water amount adjustment operation according to a first outlet water temperature interval in which the current outlet water temperature of the second heat exchanger falls.

[0260] In some embodiments, the target outlet water temperature interval can belong to a subinterval greater than a fourth temperature threshold and less than or equal to a fifth temperature threshold, that is, the target outlet water temperature interval can be greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, or can be a subinterval between the fourth temperature threshold and the fifth temperature threshold.

[0261] In some embodiments, in a case where the first outlet water temperature interval is greater than the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water amount adjustment operation includes prohibiting the increase of the water inlet amount of the second heat exchanger.

[0262] The first control strategy described above can include, in a case where the first outlet water temperature interval is greater than the fifth temperature threshold, controlling the compressor to reduce the frequency of the compressor and controlling the water amount control unit to prohibit the increase of the water inlet amount of the second heat exchanger.

[0263] In a case where the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the risk of icing of the surface of the first heat exchanger is a medium risk, and the first outlet water temperature interval being greater than the fifth temperature threshold indicates that the outlet water temperature is relatively high, and the user has a risk of scalding. Therefore, the controller can control the compressor to reduce the frequency of the compressor, and can control the water amount control unit to prohibit the increase of the water inlet amount of the second heat exchanger. This can not only avoid the increase of the water inlet amount aggravating the risk of icing, but also, due to the reduction of the frequency of the compressor, the water inlet amount of the second heat exchanger does not increase, the heat released by the refrigerant in the compressor is less, the inner coil temperature can be increased, the risk of icing can be reduced, and the outlet water temperature can be reduced, meeting the user's demand for hot water.

[0264] In some embodiments, in a case where the first outlet water temperature interval 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 amount adjustment operation includes reducing the water inlet amount of the second heat exchanger.

[0265] The first control strategy can include, in a case where the first outlet water temperature interval is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, controlling the compressor to reduce the frequency of the compressor and controlling the water amount control unit to reduce the water amount of the second heat exchanger.

[0266] In a case where the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the icing risk of the surface of the first heat exchanger is a medium risk, and the first outlet water temperature interval is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, which indicates that the outlet water temperature is close to or in the target temperature interval, and the outlet water temperature is suitable for user use. Therefore, the controller can control the compressor to reduce the frequency of the compressor and can control the water amount control unit to reduce the water amount of the second heat exchanger. Since the frequency of the compressor is reduced, the inner coil temperature can be increased, the icing risk can be reduced, and the water amount of the second heat exchanger is reduced, so that the outlet water temperature can be basically maintained or change at a small amplitude, meeting the user's demand for hot water.

[0267] In some embodiments, in a case where the first outlet water temperature interval is less than or equal to the fourth temperature threshold, the first frequency adjustment operation includes prohibiting the frequency of the compressor from being increased, and the first water amount adjustment operation includes reducing the water amount of the second heat exchanger.

[0268] The first control strategy can include, in a case where the first outlet water temperature interval is less than or equal to the fourth temperature threshold, controlling the compressor to prohibit the frequency of the compressor from being increased and controlling the water amount control unit to reduce the water amount of the second heat exchanger.

[0269] In a case where the coil temperature is greater than the first temperature threshold and less than or equal to the third temperature threshold, the icing risk of the surface of the first heat exchanger is a medium risk, and the first outlet water temperature interval is less than or equal to the fourth temperature threshold, which indicates that the outlet water temperature is low and cannot meet the user's demand for hot water. Therefore, the controller can control the compressor to prohibit the frequency of the compressor from being increased and control the water amount control unit to reduce the water amount of the second heat exchanger. Since the water amount is reduced, the heat released by the refrigerant in the compressor is less, the inner coil temperature can be increased, the icing risk can be reduced, and the outlet water temperature can be increased, which can avoid increasing the frequency of the compressor to increase the icing risk and meet the user's demand for hot water.

[0270] In the above-described embodiments, in a case where the icing risk of the surface of the first heat exchanger is a medium risk, the frequency of the compressor or the water amount of the second heat exchanger can be controlled to be reduced, so as to increase the coil temperature, reduce the icing risk, and make the outlet water temperature of the second heat exchanger tend to the target temperature interval, thereby meeting the user's demand for hot water while reducing the icing risk.

[0271] In some embodiments, in the case that the risk of icing on the surface of the first heat exchanger is low, since the risk of icing is low, when adjusting the frequency of the compressor and the water inflow amount of the second heat exchanger, more consideration can be given to making the water outflow temperature of the second heat exchanger tend to the target temperature range, so as to meet the user's demand for hot water.

[0272] In some embodiments, in the case that the first outflow 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 amount adjustment operation includes prohibiting the water inflow amount of the second heat exchanger from being reduced.

[0273] The second control strategy described above can include, in the case that the first outflow temperature range is greater than the fifth temperature threshold, controlling the compressor to reduce the frequency of the compressor, and controlling the water amount control unit to prohibit the water inflow amount of the second heat exchanger from being reduced.

[0274] In the case that 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 first heat exchanger is low, and the first outflow temperature range is greater than the fifth temperature threshold, indicating that the outflow temperature is high, and the user has a risk of scalding. Therefore, the controller can control the compressor to reduce the frequency of the compressor, and can control the water amount control unit to prohibit the water inflow amount of the second heat exchanger from being reduced, which can avoid the case that the water inflow amount is reduced and the outflow temperature rises, and since the frequency of the compressor is reduced, the inner coil temperature can be appropriately increased, the risk of icing is reduced, and the outflow temperature can be reduced, meeting the user's demand for hot water.

[0275] In some embodiments, in the case that the first outflow 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 frequency of the compressor from being increased, and the second water amount adjustment operation includes reducing the water inflow amount of the second heat exchanger.

[0276] The second control strategy described above can include, in the case that the first outflow temperature range is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, controlling the compressor to prohibit the frequency of the compressor from being increased, and controlling the water amount control unit to reduce the water inflow amount of the second heat exchanger.

[0277] In the case that the coil temperature is greater than the third temperature threshold and less than or equal to the second temperature threshold, the icing risk of the surface of the first heat exchanger is low, and the first outlet water temperature interval is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, which indicates that the outlet water temperature is close to or in the target temperature interval, and the outlet water temperature is suitable for use by the user. Therefore, the controller can control the compressor to prohibit the frequency of the compressor from being increased, and control the water amount control unit to reduce the water inlet amount of the second heat exchanger, so as to appropriately increase the inner coil temperature and reduce the icing risk, save water resources, and avoid the increase of the icing risk caused by the increase of the frequency of the compressor, and the outlet water temperature is basically maintained or slightly increased, and the demand of the user for using hot water can still be met.

[0278] In some embodiments, in the case that the first outlet water temperature interval is less than or equal to the fourth temperature threshold, the second frequency adjustment operation includes prohibiting the frequency of the compressor from being reduced, and the second water amount adjustment operation includes reducing the water inlet amount of the second heat exchanger.

[0279] The second control strategy described above can include, in the case that the first outlet water temperature interval is less than or equal to the fourth temperature threshold, controlling the compressor to prohibit the frequency of the compressor from being reduced, and controlling the water amount control unit to reduce the water inlet amount of the second heat exchanger.

[0280] In the case that the coil temperature is greater than the third temperature threshold and less than or equal to the second temperature threshold, the icing risk of the surface of the first heat exchanger is low, and the first outlet water temperature interval is less than or equal to the fourth temperature threshold, which indicates that the outlet water temperature is low and cannot meet the demand of the user for using hot water. Therefore, the controller can control the compressor to prohibit the frequency of the compressor from being reduced, so as to avoid the further reduction of the outlet water temperature caused by the reduction of the frequency of the compressor, and control the water amount control unit to reduce the water inlet amount of the second heat exchanger, so as to increase the inner coil temperature and increase the outlet water temperature, and meet the demand of the user for using hot water while reducing the icing risk.

[0281] In the above-described embodiments, in the case that the icing risk of the surface of the first heat exchanger is low, the prohibition of the reduction or decrease of the frequency of the compressor and the water inlet amount of the second heat exchanger can make the outlet water temperature of the second heat exchanger tend to the target temperature interval, and meet the demand of the user for using hot water while reducing the icing risk.

[0282] In some embodiments of the present disclosure, the icing risk of the surface of the first heat exchanger can be divided into four risk levels, and the outlet water temperature can be divided into three temperature intervals. For the medium and low icing risks, different control strategies can be used to control the frequency of the compressor and the water inflow of the second heat exchanger, so that the frequency of the compressor and the water inflow of the second heat exchanger can be more accurately controlled, the icing risk is reduced, the demand of the user for hot water is considered, and the cold air and hot water output by the air conditioner are more comfortable and stable.

[0283] It should be noted that the icing risk of the surface of the first heat exchanger can also be divided into other risk levels, such as three risk levels, five risk levels, six risk levels, etc. The outlet water temperature of the second heat exchanger can also be divided into more temperature intervals, and is not limited to the above-mentioned three temperature intervals. The number of temperature intervals can be flexibly adjusted according to actual needs, and the embodiments of the present application are not limited in this regard.

[0284] In the embodiments of the present application, the first outlet water temperature interval in which the outlet water temperature of the second heat exchanger is located can be determined, and the frequency adjustment operation of the compressor and the water amount adjustment operation of the water amount control unit can be controlled according to the coil temperature and the first outlet water temperature interval, so that the control accuracy of the frequency of the compressor and the water inflow of the second heat exchanger can be further improved, and more accurate coil temperature and outlet water temperature adjustment can be achieved.

[0285] In some embodiments, the above-mentioned method can further include: in the case that the coil temperature is less than or equal to the first temperature threshold, controlling the compressor to stop running.

[0286] In the case that the coil temperature of the first heat exchanger is less than or equal to the first temperature threshold, it indicates that the coil temperature of the first heat exchanger is too low, and the icing risk of the surface of the first heat exchanger is high. Therefore, the compressor can be controlled to stop running, so that the coil temperature of the first heat exchanger can be quickly increased, and the icing risk of the surface of the first heat exchanger can be reduced.

[0287] In some embodiments, in the case that the icing risk of the surface of the first heat exchanger is high, the compressor can be controlled to stop running, so that the coil temperature of the first heat exchanger can be quickly increased, and the icing risk of the surface of the first heat exchanger can be effectively reduced.

[0288] As shown in FIG. 29, in some other embodiments of the present disclosure, an air conditioner anti-icing method is provided, which can include the following steps:

[0289] Step 602: acquiring the coil temperature corresponding to the first heat exchanger by a first temperature sensor.

[0290] Step 604: acquiring the outlet water temperature corresponding to the second heat exchanger by a second temperature sensor.

[0291] In step 606, when the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, it is determined that the water temperature is in the first water outlet temperature interval.

[0292] In step 608, according to the coil temperature and the first water outlet temperature interval, the compressor is controlled to perform the frequency adjustment operation and the water amount control unit is controlled to perform the water amount adjustment operation, so as to increase the coil temperature and make the water outlet temperature tend to the target water outlet temperature interval.

[0293] The description of steps 602-608 can refer to the related description in the above embodiments, which will not be repeated here.

[0294] In step 610, after waiting for the first time length, step 602 is continued to be performed.

[0295] In the case where 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 the frequency adjustment operation and controls the water amount control unit to perform the water amount adjustment operation, it can wait for a first time length, and then re-perform the steps of collecting the coil temperature corresponding to the first heat exchanger through the first temperature sensor and collecting the water outlet temperature corresponding to the second heat exchanger through the second temperature sensor, continue to monitor the coil temperature and the water outlet temperature, and continue to control the compressor to perform the frequency adjustment operation and control the water amount control unit to perform the water amount adjustment operation in the case where the first heat exchanger has a risk of icing is detected according to the coil temperature.

[0296] In some embodiments, in the case where the coil temperature is less than or equal to the first temperature threshold, after the controller controls the compressor to stop running, it can also wait for a first time length, and then re-perform the step of collecting the coil temperature corresponding to the first heat exchanger through the first temperature sensor, continue to monitor the coil temperature, and if it is detected that the coil temperature is greater than the first temperature threshold, the compressor can be controlled to restart running.

[0297] The first time length can be set according to actual needs, which is not limited here, for example, the first time length can be 5 minutes, 3 minutes, 8 minutes, etc., but is not limited thereto.

[0298] In this embodiment, after the frequency of the compressor and the water inlet amount of the second heat exchanger are controlled and adjusted, a first time length is waited for, i.e., the coil temperature and the water outlet temperature are relatively stable, and then the coil temperature and the water outlet temperature are continued to be monitored, which can avoid the case where the frequency of the compressor and the water inlet amount of the second heat exchanger are controlled and adjusted when the coil temperature and the water outlet temperature are not stable enough, resulting in inaccurate control, and can also avoid too frequent control of the frequency of the compressor and the water inlet amount of the second heat exchanger, which can reduce unnecessary power consumption loss.

[0299] If it is detected that the coil temperature corresponding to the first heat exchanger is greater than the second temperature threshold, the freeze protection mode is released, the compressor is controlled to return to the working state before the frequency adjustment operation is performed, and the water amount control unit is controlled to return to the working state in which the water amount adjustment operation is performed.

[0300] In some embodiments, if the controller detects that the coil temperature corresponding to the first heat exchanger is greater than the second temperature threshold, the freeze protection mode is released if the freeze protection mode is currently in effect. The freeze protection mode can refer to a mode in which the risk of icing is reduced by controlling the frequency of the compressor and / or the water inflow of the second heat exchanger. If the controller detects that the coil temperature corresponding to the first heat exchanger is less than or equal to the second temperature threshold, the freeze protection mode is entered, in which the compressor is controlled to perform the frequency adjustment operation and the water amount control unit is controlled to perform the water amount adjustment operation, or the compressor can also be controlled to stop running, etc.

[0301] In the case of releasing the freeze protection mode, the controller can control the compressor to return to the working state before the frequency adjustment operation is performed, and control the water amount control unit to return to the working state in which the water amount adjustment operation is performed. For example, in the freeze protection mode, the controller controls the compressor to reduce the frequency, and in the case of releasing the freeze protection mode, the controller can control the compressor to increase the frequency to the frequency before the reduction; for another example, in the freeze protection mode, the controller controls the water amount control unit to prohibit the water inflow of the second heat exchanger from increasing, and in the case of releasing the freeze protection mode, the controller can control the water amount control unit to release the state of prohibiting the water inflow of the second heat exchanger from increasing, and the water inflow of the second heat exchanger can increase or decrease according to the demand, etc., but not limited thereto.

[0302] In some embodiments, if the controller detects that the coil temperature corresponding to the first heat exchanger is greater than the second temperature threshold, and the freeze protection mode is not currently in effect, the controller can not act, and the unit maintains normal operation.

[0303] In some embodiments of the present disclosure, the coil temperature corresponding to the first heat exchanger can be monitored, and the freeze protection mode can be triggered to enter or release according to the demand. In the freeze protection mode, the risk of icing can be reduced by controlling the frequency of the compressor and / or the water inflow of the second heat exchanger, and the demand of the user for hot water can also be taken into account at the same time, thereby improving the stability of the operation of the air conditioning unit.

[0304] The controller can control the compressor to perform the frequency adjustment operation and control the water amount control unit to perform the water amount adjustment operation in a variety of different control modes. In some embodiments, a precise one-step control mode can be adopted. As shown in FIG. 30, the step of controlling the compressor to perform the frequency adjustment operation and controlling the water amount control unit to perform the water amount adjustment operation according to the coil temperature and the water outlet temperature can include the following steps:

[0305] At step 702, the target frequency and the target water amount are determined according to the coil temperature and the outlet water temperature.

[0306] In some embodiments, the controller can first determine the frequency adjustment operation required to be performed by the compressor and the water amount adjustment operation required to be performed by the water amount control unit according to the coil temperature and the outlet water temperature. The specific determination manner can refer to the related description in the above embodiments, which will not be repeated here.

[0307] If the frequency adjustment operation required to be performed by the compressor is to reduce the frequency of the compressor, the controller can determine the target frequency according to 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.

[0308] If the frequency adjustment operation required to be performed by the compressor is to prohibit the frequency of the compressor from being increased or to prohibit the frequency of the compressor from being reduced, the current frequency of the compressor can be taken as the target frequency, so that the compressor can be maintained at the current frequency.

[0309] If the water amount adjustment operation required to be performed by the water amount control unit is to reduce the water amount of the second heat exchanger, the controller can determine the target water amount according to the coil temperature and the outlet water temperature. For example, the lower the coil temperature, the lower the target water amount can be; the lower the outlet water temperature, the lower the target water amount can be.

[0310] If the water amount adjustment operation required to be performed by the water amount control unit is to prohibit the water amount of the second heat exchanger from being increased or to prohibit the water amount of the second heat exchanger from being reduced, the current water amount of the water amount control unit can be taken as the target water amount, so that the water amount of the second heat exchanger is maintained at the current water amount.

[0311] In some embodiments, the target frequency and the target water amount can also be determined by an artificial intelligence model, which has the function of recommending the optimal frequency of the compressor and the optimal water amount of the second heat exchanger, so as to reduce the icing risk while ensuring the user's demand for using hot water.

[0312] The coil temperature and the outlet water temperature can be input into a pre-trained artificial intelligence model. The artificial intelligence model can output the target frequency and the target water amount by analyzing the coil temperature and the outlet water temperature. The target frequency and the target water amount obtained by the artificial intelligence model are more accurate, which can more effectively achieve the reduction of the icing risk while taking into account the user's demand for using hot water.

[0313] At step 704, the frequency of the compressor is adjusted to the target frequency.

[0314] After the target frequency is determined, the controller can generate a first control instruction according to the target frequency, and send the first control instruction to the compressor to control the compressor to adjust the frequency of the compressor to the target frequency.

[0315] In some embodiments, if the frequency adjustment operation required to be performed by the compressor is to prohibit the frequency of the compressor from being raised, or to prohibit the frequency of the compressor from being lowered, the controller can generate a first control instruction carrying the target frequency and a prohibition of raising identifier, or can generate a first control instruction carrying the target frequency and a prohibition of lowering identifier, to control the compressor to prohibit the frequency of the compressor from being raised or lowered.

[0316] The prohibition of raising identifier and the prohibition of lowering identifier can be two different identifiers set in advance, the prohibition of raising identifier is used to identify the operation of prohibiting the frequency of the compressor from being raised, and the prohibition of lowering identifier is used to identify the operation of prohibiting the frequency of the compressor from being lowered. For example, the prohibition of raising identifier and the prohibition of lowering identifier can be composed of one or more of numbers, letters, symbols, etc.

[0317] At step 706, the water amount control unit is controlled to adjust the water inlet amount of the second heat exchanger to the target water inlet amount.

[0318] After the target water inlet amount is determined, the controller can generate a second control instruction according to the target water inlet amount, and send the second control instruction to the water amount control unit to control the water amount control unit to adjust the water inlet amount of the second heat exchanger to the target water inlet amount.

[0319] In some embodiments, if the water amount adjustment operation performed by the water amount control unit is to prohibit the water inlet amount of the second heat exchanger from being increased, or to prohibit the water inlet amount of the second heat exchanger from being decreased, the controller can generate a second control instruction carrying the target water inlet amount and a prohibition of increasing identifier, or can generate a second control instruction carrying the target water inlet amount and a prohibition of decreasing identifier, to control the water amount control unit to prohibit the water inlet amount of the second heat exchanger from being increased or decreased.

[0320] In some embodiments of the present disclosure, the target frequency required by the compressor and the target water inlet amount required by the second heat exchanger can be determined according to the coil temperature and the outlet water temperature, and the compressor is directly controlled to adjust to the target frequency, and the water amount control unit is controlled to adjust the water inlet amount of the second heat exchanger to the target water inlet amount, so that the control adjustment efficiency is improved, and the efficiency of reducing the icing risk and adjusting the outlet water temperature is accelerated.

[0321] In some embodiments, the frequency of the compressor and the water inlet amount of the second heat exchanger can be controlled in a step-by-step adjustment control manner. As shown in FIG. 31, the step of controlling the compressor to perform a frequency adjustment operation and controlling the water amount control unit to perform a water amount adjustment operation according to the coil temperature and the outlet water temperature can include the following steps:

[0322] Step 802, according to the coil temperature and the outlet water temperature, the frequency adjustment direction and the water quantity adjustment direction are determined.

[0323] In some embodiments, the controller can first determine the frequency adjustment operation required to be performed by the compressor and the water quantity adjustment operation required to be performed by the water quantity control unit according to the coil temperature and the outlet water temperature. The specific determination method can refer to the related description in the above embodiments, which will not be repeated here.

[0324] The frequency adjustment direction can be determined according to the frequency adjustment operation required to be performed by the compressor. The frequency adjustment direction can refer to the trend of the frequency of the compressor.

[0325] For example, if the frequency adjustment operation required to be performed by the compressor is to reduce the frequency of the compressor, the controller can determine that the frequency adjustment direction is to reduce the frequency; if the frequency adjustment operation required to be performed by the compressor is to prohibit the frequency of the compressor from increasing, the controller can determine that the frequency adjustment direction is to prohibit the frequency from increasing; if the frequency adjustment operation required to be performed by the compressor is to prohibit the frequency of the compressor from decreasing, the controller can determine that the frequency adjustment direction is to prohibit the frequency from decreasing.

[0326] The water quantity adjustment direction can be determined according to the water quantity adjustment operation required to be performed by the water quantity control unit. The water quantity adjustment direction can refer to the trend of the water quantity of the second heat exchanger.

[0327] For example, if the water quantity adjustment operation required to be performed by the water quantity control unit is to increase the water quantity of the second heat exchanger, the controller can determine that the water quantity adjustment direction is to increase the water quantity; if the water quantity adjustment operation required to be performed by the water quantity control unit is to decrease the water quantity of the second heat exchanger, the controller can determine that the water quantity adjustment direction is to decrease the water quantity; if the water quantity adjustment operation required to be performed by the water quantity control unit is to prohibit the water quantity of the second heat exchanger from increasing, the controller can determine that the water quantity adjustment direction is to prohibit the water quantity from increasing; if the water quantity adjustment operation required to be performed by the water quantity control unit is to prohibit the water quantity of the second heat exchanger from decreasing, the controller can determine that the water quantity adjustment direction is to prohibit the water quantity from decreasing.

[0328] Step 804, the controller controls the compressor to adjust the frequency of the compressor according to the preset frequency step and the frequency adjustment direction.

[0329] The preset frequency step can refer to the frequency that can be adjusted each time, for example, 5Hz (Hertz), 10Hz, 6Hz, etc., but not limited thereto.

[0330] The controller can generate a first control instruction according to the frequency adjustment direction and the preset frequency step, and send the first control instruction to the compressor, so that the compressor adjusts the frequency according to the preset frequency step and the frequency adjustment direction.

[0331] For example, if the frequency adjustment direction is to reduce the frequency of the compressor, the compressor can reduce the preset frequency step size. For example, if the frequency adjustment direction is to prohibit the frequency from being increased or to prohibit the frequency from being reduced, the controller can also directly generate the first control instruction according to the frequency adjustment direction, and send the first control instruction to the compressor, so that the compressor prohibits the frequency of the compressor from being increased or reduced.

[0332] At step 806, the water amount control unit is controlled to adjust the water amount of the second heat exchanger according to the preset water amount step size and the water amount adjustment direction.

[0333] The preset water amount step size can refer to a preset water amount that can be adjusted each time, such as 0.1 m3 / s (cubic meters per second), 0.5 m3 / s, and the like, but is not limited thereto.

[0334] The controller can generate the second control instruction according to the water amount adjustment direction and the preset water amount step size, and send the second control instruction to the water amount control unit, so that the water amount control unit adjusts the water amount according to the preset water amount step size and the water amount adjustment direction.

[0335] For example, if the water amount adjustment direction is to increase the water amount, the water amount control unit can increase the water amount of the second heat exchanger by the preset water amount step size; if the water amount adjustment direction is to reduce the water amount, the water amount control unit can reduce the water amount of the second heat exchanger by the preset water amount step size. For example, if the water amount adjustment direction is to prohibit the water amount from being increased or to prohibit the water amount from being reduced, the controller can also directly generate the second control instruction according to the water amount adjustment direction, and send the second control instruction to the water amount control unit, so that the water amount control unit prohibits the water amount of the second heat exchanger from being increased or reduced.

[0336] In some embodiments of the present disclosure, the frequency of the compressor and the water amount of the second heat exchanger can be controlled and adjusted according to the preset frequency step size and the preset water amount step size, respectively, which can avoid the frequency of the compressor and / or the water amount of the second heat exchanger being adjusted too much at one time, causing a significant change in use for the user, and gradually adjusting the frequency of the compressor and the water amount of the second heat exchanger can improve the user experience.

[0337] In some embodiments, the water amount control unit can only include one water amount control valve, and the controller can directly control the water amount control valve to perform the water amount adjustment operation, so as to accurately control the water amount of the second heat exchanger.

[0338] In some embodiments, the water amount control unit 170 can include a plurality of water amount control valves, which can be connected in parallel. The plurality of water amount control valves can correspond to different water amounts, respectively. The controller can determine a target water amount control valve from the plurality of water amount control valves according to the coil temperature and the outlet water temperature, control the target water amount control valve to be opened, and control other water amount control valves except the target water amount control valve to be closed, so that water is transmitted to the second heat exchanger through the target water amount control valve.

[0339] The controller can determine a water amount adjustment operation required to be performed by the water amount control unit according to the coil temperature and the outlet water temperature, and determine a target water amount control valve from the plurality of water amount control valves according to the water amount adjustment operation required to be performed. The target water amount control valve is the water amount control valve that needs to be opened corresponding to the water amount adjustment operation required to be performed.

[0340] In some embodiments, taking three water amount control valves as an example, the water amount corresponding to the water amount control valve A can be less than the water amount corresponding to the water amount control valve B, and the water amount corresponding to the water amount control valve B can be less than the water amount corresponding to the water amount control valve C. For example, if the water amount adjustment operation required to be performed by the water amount control unit is to increase the water amount of the second heat exchanger, and the currently opened water amount control valve is the water amount control valve B, the target water amount control valve can be the water amount control valve C. If the water amount adjustment operation required to be performed by the water amount control unit is to decrease the water amount of the second heat exchanger, and the currently opened water amount control valve is the water amount control valve C, the target water amount control valve can be the water amount control valve B or the water amount control valve A. If the water amount adjustment operation required to be performed by the water amount control unit is to prohibit the water amount of the second heat exchanger from being increased, and the currently opened water amount control valve is the water amount control valve A, the target water amount control valve can be the water amount control valve A, and the water amount control valve B and the water amount control valve C are in a state of being unable to be opened. If the water amount adjustment operation required to be performed by the water amount control unit is to prohibit the water amount of the second heat exchanger from being decreased, and the currently opened water amount control valve is the water amount control valve B, the target water amount control valve can be the water amount control valve B, and the water amount control valve A is in a state of being unable to be opened.

[0341] After the target water amount control valve is determined, the controller can control the target water amount control valve to be opened, and control other water amount control valves except the target water amount control valve to be closed, so that water is transmitted to the second heat exchanger through the target water amount control valve.

[0342] In some embodiments of the present disclosure, the water amount control unit can include a plurality of water amount control valves, and the plurality of water amount control valves correspond to different water amounts, respectively. A target water amount control valve can be selected to be opened and other water amount control valves can be closed according to the coil temperature and the outlet water temperature, so that the water amount of the second heat exchanger is flexibly controlled, and the control logic is simpler, and the cost can be reduced.

[0343] As shown in FIG. 33, in some embodiments, a water-cooled air conditioner 100 is provided, which can include a compressor 4 configured to compress refrigerant.

[0344] In some embodiments, as shown in FIG. 33, the water-cooled air conditioner 100 can include a second heat exchanger 7 configured to exchange heat between refrigerant and water.

[0345] In some embodiments, as shown in FIG. 33, the water-cooled air conditioner 100 can include a first heat exchanger 5 configured to exchange heat between refrigerant and air.

[0346] In some embodiments, as shown in FIG. 33, the water-cooled air conditioner 100 can include a water amount control unit 170 configured to adjust the water inflow amount of the second heat exchanger.

[0347] In some embodiments, as shown in FIG. 33, the water-cooled air conditioner 100 can include a first temperature sensor 150 configured to collect the temperature of the corresponding coil of the first heat exchanger.

[0348] In some embodiments, as shown in FIG. 33, the water-cooled air conditioner 100 can include a second temperature sensor 160 configured to collect the temperature of the corresponding water outlet of the second heat exchanger.

[0349] In some embodiments, as shown in FIG. 33, the water-cooled air conditioner 100 can include a controller 2 configured to obtain the temperature of the coil and the temperature of the water outlet, and, when the temperature of the coil is greater than a first temperature threshold and less than or equal to a second temperature threshold, control the compressor to perform a frequency adjustment operation and control the water amount control unit to perform a water amount adjustment operation according to the temperature of the coil and the temperature of the water outlet, so as to increase the temperature of the coil and make the temperature of the water outlet tend to a target water outlet temperature range.

[0350] In some embodiments, the controller 2 can be further configured to determine a first water outlet temperature range in which the temperature of the water outlet is located, and control the compressor to perform a frequency adjustment operation and control the water amount control unit to perform a water amount adjustment operation according to the temperature of the coil and the first water outlet temperature range.

[0351] In some embodiments, the controller 2 can be further configured to, when the temperature of the coil is greater than the 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 amount control unit to perform a first water amount adjustment operation according to the first water outlet temperature range.

[0352] In some embodiments, the controller 2 can be further configured to, in a case that 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 amount control unit to perform a second water amount adjustment operation according to the first outlet water temperature interval.

[0353] wherein the first frequency adjustment operation is different from the second frequency adjustment operation, and / or the first water amount adjustment operation is different from the second water amount adjustment operation.

[0354] In some embodiments, the target outlet water temperature interval belongs to a sub-interval greater than a fourth temperature threshold and less than or equal to a fifth temperature threshold. In a case that the first outlet water temperature interval is greater than the fifth temperature threshold, the first frequency adjustment operation comprises reducing the frequency of the compressor, and the first water amount adjustment operation comprises prohibiting the water amount of the second heat exchanger from being increased. In a case that the first outlet water temperature interval is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the first frequency adjustment operation comprises reducing the frequency of the compressor, and the first water amount adjustment operation comprises reducing the water amount of the second heat exchanger. In a case that the first outlet water temperature interval is less than or equal to the fourth temperature threshold, the first frequency adjustment operation comprises prohibiting the frequency of the compressor from being increased, and the first water amount adjustment operation comprises reducing the water amount of the second heat exchanger.

[0355] In some embodiments, the target outlet water temperature interval belongs to a sub-interval greater than a fourth temperature threshold and less than or equal to a fifth temperature threshold. In a case that the first outlet water temperature interval is greater than the fifth temperature threshold, the second frequency adjustment operation comprises reducing the frequency of the compressor, and the second water amount adjustment operation comprises prohibiting the water amount of the second heat exchanger from being decreased. In a case that the first outlet water temperature interval is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold, the second frequency adjustment operation comprises prohibiting the frequency of the compressor from being increased, and the second water amount adjustment operation comprises reducing the water amount of the second heat exchanger. In a case that the first outlet water temperature interval is less than or equal to the fourth temperature threshold, the second frequency adjustment operation comprises prohibiting the frequency of the compressor from being reduced, and the second water amount adjustment operation comprises reducing the water amount of the second heat exchanger.

[0356] In some embodiments, the controller 2 can be further configured to, in a case that the coil temperature is less than or equal to a first temperature threshold, control the compressor to stop running.

[0357] In some embodiments, the controller 2 can be further configured to, after controlling the compressor to perform the frequency adjustment operation and controlling the water amount control unit to perform the water amount adjustment operation, wait for a first time duration, and then re-acquire the coil temperature corresponding to the first heat exchanger collected by the first temperature sensor and acquire the outlet water temperature corresponding to the second heat exchanger collected by the second temperature sensor.

[0358] In some embodiments, the controller 2 can be further configured to, if it is detected that the temperature of the first heat exchanger is greater than the second temperature threshold, release the freeze protection mode, control the compressor to return to a working state before the frequency adjustment operation is performed, and control the water amount control unit to return to a working state before the water amount adjustment operation is performed.

[0359] In some embodiments, the controller 2 can be further configured to, according to the coil temperature and the outlet water temperature, determine a target frequency and a target water inlet amount; control the compressor to adjust the frequency of the compressor to the target frequency; and control the water amount control unit to adjust the water inlet amount of the second heat exchanger to the target water inlet amount.

[0360] In some embodiments, the controller 2 can be further configured to, according to the coil temperature and the outlet water temperature, determine a frequency adjustment direction and a water inlet amount adjustment direction; control the compressor to adjust the frequency of the compressor according to a preset frequency step and the frequency adjustment direction; and control the water amount control unit to adjust the water inlet amount of the second heat exchanger according to a preset water inlet amount step and the water inlet amount adjustment direction.

[0361] In some embodiments, the water amount control unit can include a plurality of water amount control valves, and the plurality of water amount control valves correspond to different water inlet amounts respectively.

[0362] The controller 2 is further configured to, according to the coil temperature and the outlet water temperature, determine a target water amount control valve from the plurality of water amount control valves; control the target water amount control valve to be opened, and control other water amount control valves except the target water amount control valve to be closed, so that water is transmitted to the second heat exchanger through the target water amount control valve.

[0363] In some embodiments, as shown in FIG. 33, the water-cooled air conditioner 100 can further include a hot water outlet and a drainage device. When the hot water outlet is opened, the drainage device is closed, and the water output by the second heat exchanger is output through the hot water outlet; when the hot water outlet is closed, the drainage device is opened, and the water output by the second heat exchanger is output through the drainage device.

[0364] In some embodiments, the drainage device can be configured to be in a closed state when the pipeline pressure of the outlet pipeline of the second heat exchanger is less than the corresponding drainage pressure of the drainage device, and be in an opened state when the pipeline pressure of the outlet pipeline of the second heat exchanger is greater than the corresponding drainage pressure of the drainage device.

[0365] It should be noted that the description of the water-cooled air conditioner provided in the embodiments of the present disclosure can refer to the related description of the air conditioner freeze protection method provided in the above embodiments, which will not be repeated here.

[0366] In some embodiments of the present disclosure, the water-cooled air conditioner collects the coil temperature corresponding to the first heat exchanger through a first temperature sensor, and collects the outlet water temperature corresponding to the second heat exchanger through 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 first heat exchanger has a certain icing risk. Then, the controller can control the compressor to perform frequency adjustment operation and control the water amount control unit to perform water amount adjustment operation according to the coil temperature and the outlet water temperature. By adjusting and controlling the frequency of the compressor and the inlet water amount of the second heat exchanger, the coil temperature can be increased, thereby effectively reducing the icing risk of the surface of the heat exchanger of the water-cooled air conditioner, and the outlet water temperature of the second heat exchanger can tend to the target outlet water temperature interval, thereby meeting the user's demand for hot water and improving the stability of the air conditioner operation.

[0367] As shown in FIG. 34, in some embodiments of the present disclosure, an air conditioner anti-freezing device 1100 is provided, which can be applied to the water-cooled air conditioner described above.

[0368] In some embodiments, as shown in FIG. 34, the air conditioner anti-freezing device 1100 can include a first acquisition module 1110. The first acquisition module 1110 can be used to collect the coil temperature corresponding to the first heat exchanger through a first temperature sensor.

[0369] In some embodiments, as shown in FIG. 34, the air conditioner anti-freezing device 1100 can include a second acquisition module 1120. The second acquisition module 1120 can be used to collect the outlet water temperature corresponding to the second heat exchanger through a second temperature sensor.

[0370] In some embodiments, as shown in FIG. 34, the air conditioner anti-freezing device 1100 can include an anti-freezing control module 1130. The anti-freezing control module 1130 can be used to control the compressor to perform frequency adjustment operation and control the water amount control unit to perform water amount adjustment operation according to 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, so as to increase the coil temperature and make the outlet water temperature tend to the target outlet water temperature interval.

[0371] In some embodiments, the anti-freezing control module 1130 can include an interval determination unit and a control unit. The interval determination unit can be used to determine the first outlet water temperature interval in which the outlet water temperature is located. The control unit can be used to control the compressor to perform frequency adjustment operation and control the water amount control unit to perform water amount adjustment operation according to the coil temperature and the first outlet water temperature interval.

[0372] In some embodiments, the control unit can be further configured to, if the coil temperature is greater than the 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 amount control unit to perform a first water amount adjustment operation according to the first outlet water temperature interval; if the coil temperature is greater than the 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 amount control unit to perform a second water amount adjustment operation according to the first outlet water temperature interval; wherein the first frequency adjustment operation is different from the second frequency adjustment operation, and / or the first water amount adjustment operation is different from the second water amount adjustment operation.

[0373] In some embodiments, the target outlet water temperature interval can belong to a sub-interval greater than a fourth temperature threshold and less than or equal to a fifth temperature threshold. If the first outlet water temperature interval is greater than the fifth temperature threshold, the first frequency adjustment operation includes reducing the frequency of the compressor, and the first water amount adjustment operation includes prohibiting the increase of the water amount of the second heat exchanger. If the first outlet water temperature interval 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 amount adjustment operation includes reducing the water amount of the second heat exchanger. If the first outlet water temperature interval is less than or equal to the fourth temperature threshold, the first frequency adjustment operation includes prohibiting the increase of the frequency of the compressor, and the first water amount adjustment operation includes reducing the water amount of the second heat exchanger.

[0374] In some embodiments, the target outlet water temperature interval can belong to a sub-interval greater than a fourth temperature threshold and less than or equal to a fifth temperature threshold. If the first outlet water temperature interval is greater than the fifth temperature threshold, the second frequency adjustment operation includes reducing the frequency of the compressor, and the second water amount adjustment operation includes prohibiting the decrease of the water amount of the second heat exchanger. If the first outlet water temperature interval 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 increase of the frequency of the compressor, and the second water amount adjustment operation includes reducing the water amount of the second heat exchanger. If the first outlet water temperature interval is less than or equal to the fourth temperature threshold, the second frequency adjustment operation includes prohibiting the decrease of the frequency of the compressor, and the second water amount adjustment operation includes reducing the water amount of the second heat exchanger.

[0375] In some embodiments, the anti-freezing device 1100 of the air conditioner can further include a stopping module. The stopping module can be configured to control the compressor to stop running if the coil temperature is less than or equal to the first temperature threshold.

[0376] In some embodiments, the first acquisition module 1110 can be further configured to, after the anti-freezing control module 1130 controls the compressor to perform the frequency adjustment operation and controls the water amount control unit to perform the water amount adjustment operation, re-acquire the coil temperature of the first heat exchanger through the first temperature sensor after waiting for a first time length.

[0377] In some embodiments, the second collecting module 1120 can also be configured to, after the anti-freezing control module 1130 controls the compressor to perform the frequency adjustment operation and controls the water quantity control unit to perform the water quantity adjustment operation, wait for a first time duration, and then collect, by the second temperature sensor, the outlet water temperature corresponding to the second heat exchanger.

[0378] In some embodiments, the air conditioner anti-freezing device 1100 can further include a release module. The release module can be configured to, if it is detected that the coil temperature corresponding to the first heat exchanger is greater than the second temperature threshold, release the freeze protection mode, control the compressor to return to the working state before the frequency adjustment operation is performed, and control the water quantity control unit to return to the working state before the water quantity adjustment operation is performed.

[0379] In some embodiments, the anti-freezing control module 1130 can also be configured to determine a target frequency and a target water inlet quantity according to the coil temperature and the outlet water temperature, control the compressor to adjust the frequency of the compressor to the target frequency, and control the water quantity control unit to adjust the water inlet quantity of the second heat exchanger to the target water inlet quantity.

[0380] In some embodiments, the anti-freezing control module 1130 can also be configured to determine a frequency adjustment direction and a water inlet quantity adjustment direction according to 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 the frequency adjustment direction, and control the water quantity control unit to adjust the water inlet quantity of the second heat exchanger according to a preset water inlet quantity step and the water inlet quantity adjustment direction.

[0381] In some embodiments, the water quantity control unit can include a plurality of water quantity control valves corresponding to different water inlet quantities. The anti-freezing control module 1130 can also be configured to determine a target water quantity control valve from the plurality of water quantity control valves according to the coil temperature and the outlet water temperature, control the target water quantity control valve to be opened, and control other water quantity control valves except the target water quantity control valve to be closed, so that water is transmitted to the second heat exchanger through the target water quantity control valve.

[0382] In some embodiments of the present disclosure, the water-cooled air conditioner can collect the coil temperature corresponding to the first heat exchanger through the first temperature sensor, and collect the outlet water temperature corresponding to the second heat exchanger through the second temperature sensor. When the coil temperature is greater than the first temperature threshold and less than or equal to the second temperature threshold, it indicates that the surface of the first heat exchanger has a certain icing risk. Then, the controller can control the compressor to perform frequency adjustment operation and control the water amount control unit to perform water amount adjustment operation according to the coil temperature and the outlet water temperature. By adjusting and controlling the frequency of the compressor and the inlet water amount of the second heat exchanger, the coil temperature can be increased, thereby effectively reducing the icing risk of the surface of the heat exchanger of the air conditioner, and the outlet water temperature of the second heat exchanger can tend to the target outlet water temperature interval, thereby meeting the user's demand for hot water and improving the stability of the air conditioner operation.

[0383] In some embodiments of the present disclosure, as shown in FIG. 35, the water-cooled air conditioner 100 can include one or more of the following components: a processor 110, a memory 120 coupled with the processor 110. The memory 120 can store one or more computer programs. The one or more computer programs can be configured to be executed by the one or more processors 110 to implement the methods described in the above embodiments.

[0384] In some embodiments, the processor 110 can include one or more processing cores. The processor 110 connects various parts in the water-cooled air conditioner 100 through various interfaces and lines, and performs various functions and processes data of the water-cooled air conditioner 100 by running or executing instructions, programs, code sets or instruction sets stored in the memory 120, and calling data stored in the memory 120. Alternatively, the processor 110 can be implemented in at least one of the following hardware forms: digital signal processing (DSP), field-programmable gate array (FPGA), programmable logic array (PLA).

[0385] In some embodiments, the memory 120 can include random access memory (RAM) and can also include read-only memory (ROM).

[0386] Those skilled in the art will understand that the scope of the present disclosure is not limited to the above specific embodiments, and certain elements of the embodiments can be modified and replaced without departing from the spirit of the present disclosure. The scope of the present disclosure is limited by the appended claims.

Claims

A water-cooled air conditioner comprises: a refrigerant circulation loop comprising a compressor, a first heat exchanger, a throttling device and a second heat exchanger connected in sequence by a refrigerant pipeline; a fan for driving indoor air to flow through the first heat exchanger for heat exchange; a water pipeline having an inlet end connected to an external cold water inlet and an outlet end connected to an external water unit, the second heat exchanger being connected to the water pipeline, water in the water pipeline being exchanged with refrigerant in the refrigerant pipeline in the second heat exchanger; a water branch pipeline connected between the second heat exchanger and the outlet end, the water branch pipeline being used to discharge part of the water in the water pipeline; wherein a water drainage device is arranged on the water branch pipeline, the water drainage device being used to control the connection and disconnection of the water branch pipeline. The water-cooled air conditioner according to claim 1, wherein the second heat exchanger comprises: a first heat exchange pipeline connected to the refrigerant pipeline; a second heat exchange pipeline connected to the water pipeline, and an outlet end of the first heat exchange pipeline being arranged adjacent to an inlet end of the second heat exchange pipeline, the conveying direction of refrigerant in the first heat exchange pipeline being opposite to the conveying direction of water in the second heat exchange pipeline. The water-cooled air conditioner according to claim 1 or 2, further comprising: a water drainage assembly for collecting water discharged by the water branch pipeline; the water drainage assembly comprising: a water collecting container connected to the water branch pipeline to store water discharged by the water branch pipeline; a first water drainage opening arranged on the water collecting container and connected to the water collecting container to discharge water in the water collecting container. The water-cooled air conditioner according to claim 3, wherein the water drainage assembly further comprises: a water pan arranged below the first heat exchanger to collect condensate water of the first heat exchanger; and the water pan being connected to the water collecting container to convey the condensate water of the first heat exchanger into the water collecting container. The water-cooled air conditioner according to claim 3 or 4, wherein the water drainage assembly further comprises: a pump connected to the water collecting container to extract water stored in the water collecting container; a second water drainage opening connected to the pump and arranged above the first water drainage opening; and the pump being capable of driving water in the water collecting container to be discharged through the second water drainage opening. The water-cooled air conditioner according to claim 5, wherein the water drainage assembly further comprises: a water level monitoring device for monitoring the height of water in the water collecting container; and the water level monitoring device being connected to the pump to control the start and stop of the pump. The water-cooled air conditioner according to any one of claims 1-6, further comprising: a regulating device connected between the second heat exchanger and the inlet end, the regulating device being used to adjust the flow area of the water pipeline to adjust the flow rate of water in the water pipeline into the second heat exchanger. ​ The water-cooled air conditioner according to any one of claims 1-7, wherein the first heat exchange pipe is sleeved on the outer periphery of the second heat exchange pipe, and the track line of the first heat exchange pipe is coincident with the track line of the second heat exchange pipe; and the inlet end of the first heat exchange pipe is arranged adjacent to the outlet end of the second heat exchange pipe. The water-cooled air conditioner according to claim 8, wherein the first heat exchange pipe and the second heat exchange pipe are arranged in a spiral manner, and are arranged beside the compressor, or are arranged around the compressor. The water-cooled air conditioner according to any one of claims 1-9, wherein the shell comprises: an upper shell, wherein the first heat exchanger is arranged in the upper shell, and the front side of the upper shell is provided with an air inlet and an air outlet, and the air inlet is arranged below the air outlet; a lower shell arranged below the upper shell, and the compressor, the second heat exchanger and the water drainage device are arranged in the lower shell, and the inlet end of the water circuit and the outlet end of the water circuit are arranged on the rear side of the lower shell, and the inlet end is arranged below the outlet end. A water-cooled air conditioner comprising: a compressor; a second heat exchanger configured to receive refrigerant output by the compressor and condense the refrigerant; a first heat exchanger configured to receive refrigerant output by the second heat exchanger and evaporate the refrigerant to return to the compressor to form a refrigeration cycle; a fan configured to introduce air and exchange heat between the air and the first heat exchanger; and the second heat exchanger further comprises: a cold water inlet arranged adjacent to a refrigerant outlet of the second heat exchanger and configured to introduce an external water source into the second heat exchanger to exchange heat with the refrigerant; a hot water outlet configured to output hot water generated after heat exchange to outside of the second heat exchanger; and a controller configured to control the water inlet amount of the cold water inlet, and the controller is configured to: Obtaining a first preset temperature T1, a second preset temperature T2, and making T2 冷出 and a cold water inlet temperature T 入水 Obtaining a difference value ΔT of the refrigerant outlet temperature T 冷出 and the cold water inlet temperature T 入水 , ΔT = T 冷出 -T 入水 ; maintain the water inlet amount of the cold water inlet when T2≤△T≤T1; reduce the water inlet amount of the cold water inlet when △T increase the water inlet amount of the cold water inlet when T1<△T. The water-cooled air conditioner according to claim 11, wherein a first preset time t1 is obtained; In the case that the water-cooled air conditioner receives an opening signal, the running frequency of the enabled fan is acquired, and the fan is enabled to run at the running frequency, and after the water-cooled air conditioner runs for a first preset time t1, the indoor environment temperature T 环 is collected. The water-cooled air conditioner according to claim 11 or 12, wherein the controller is further configured to: obtain a second preset time t2; and According to the collected indoor environment temperature T 环 And the fan enabled operating frequency, match the water inlet of the cold water inlet, to form the initial operation parameters; operate the water-cooled air conditioner at initial operating parameters for the second preset time t2. The water-cooled air conditioner according to claim 13, wherein the controller is further configured to: set a plurality of operating frequencies of the fan, and arrange the plurality of operating frequencies in sequence; set a plurality of water inlet amounts of the cold water inlet, and arrange the plurality of water inlet amounts in sequence, and each water inlet amount corresponds to each operating frequency one by one. acquiring a first preset ambient temperature T 环1 , a second preset ambient temperature T 环2 , and making T 环2 <T 环1 ; In T 环1 In the case of T 环 , based on the running frequency of the fan enabled, the water inflow is matched in sequence, and the matched water inflow is configured to the second heat exchanger; In the case of T 环2 ≤ T 环 ≤ T 环1 , based on the operating frequency of the fan enabled, the water inflow is matched in descending order, and the matched water inflow is configured to the second heat exchanger; and the maximum water inflow obtained is matched in descending order as the first limit water inflow. In the case of T 环 In the case of T 环2 , based on the running frequency of the fan enabled, the water inflow is matched in descending order, the matched water inflow is less than the first limit water inflow, and the matched water inflow is configured to the second heat exchanger. The water-cooled air conditioner according to any one of claims 11-14, wherein an adjusting device is arranged upstream of the cold water inlet in the water flow direction to adjust the water inlet amount of the cold water inlet, and The adjusting device is capable of adjusting the pipe area connected to the cold water inlet to increase or decrease the water inlet amount of the cold water inlet. The water-cooled air conditioner according to any one of claims 11-15, wherein the controller is further configured to: obtaining a first preset air pipe temperature T 内1 , a second preset air pipe temperature T 内2 , and a temperature T 内盘 of the first heat exchanger, and making T 内2 <T 内1 ; In the case that T 内盘 In the case that T 内1 reducing the water inlet amount of the cold water inlet of the water-cooled air conditioner. In the case where T 内盘 In the case where T 内2 the compressor is stopped. The water-cooled air conditioner according to claim 16, wherein the controller is further configured to: acquiring a third preset time t3 ; In the case of T 内盘 In the case of T 内2 The fan is kept running at the current operating frequency, and the compressor is stopped and then restarted after a third preset time t3. The water-cooled air conditioner according to any one of claims 11-17, wherein the controller is further configured to: acquire a first preset outlet water temperature T 出1 , a second preset outlet water temperature T 出2 , and a temperature T 出水 of the hot water outlet, and make T 出2 <T 出1 ; In the case where T 出2 In the case where T 出水 In the case where T 出1 the water-cooled air conditioner reduces the water inlet amount of the cold water inlet; In the case of T 出水 In the case of T 出2 maintaining the water inlet amount of the cold water inlet of the water-cooled air conditioner; In the case where T 出水 > T 出1 , the compressor is stopped. The water-cooled air conditioner according to claim 18, wherein the controller is further configured to: acquire a third preset time t3; In the case of T 出水 > T 出1 , the fan is kept running at the current operating frequency, and the compressor is stopped and then restarted after a third preset time t3. A control method of a water-cooled air conditioner, based on the water-cooled air conditioner according to any one of claims 11-19, comprising: circulating the refrigerant between the compressor, the second heat exchanger and the first heat exchanger to form a refrigeration cycle, and making an external water source enter the second heat exchanger to exchange heat with the refrigerant in the second heat exchanger; obtaining a first preset temperature T1, a second preset temperature T2, and making T2 冷出 and a cold water inlet temperature T 入水 obtaining a difference value AT of the refrigerant outlet temperature T 冷出 and the cold water inlet temperature T 入水 , AT = T 冷出 -T 入水 ; and, in the case of T2≤△T≤T1, maintaining the water inlet amount of the cold water inlet of the water-cooled air conditioner; in the case of △T<T2, decreasing the water inlet amount of the cold water inlet of the water-cooled air conditioner; in the case of T1<△T, increasing the water inlet amount of the cold water inlet of the water-cooled air conditioner. An anti-freezing method of an air conditioner, applied to a water-cooled air conditioner, the water-cooled air conditioner comprising a compressor, a second heat exchanger, a first heat exchanger, a first temperature sensor, a second temperature sensor and a water amount control unit, the compressor being used for compressing refrigerant, the second heat exchanger being used for exchanging heat between refrigerant and water, the first heat exchanger being used for exchanging heat between refrigerant and air, and the water amount control unit being used for controlling the water inlet amount of the second heat exchanger; the method comprising: acquiring the coil temperature corresponding to the first heat exchanger through the first temperature sensor; acquiring the outlet water temperature corresponding to the second heat exchanger through the second temperature sensor; in the case that the coil temperature is greater than a first temperature threshold and less than or equal to a second temperature threshold, controlling the compressor to perform a frequency adjustment operation and controlling the water amount control unit to perform a water amount adjustment 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 a target outlet water temperature interval. The method according to claim 21, wherein the controlling the compressor to perform a frequency adjustment operation and the controlling the water amount control unit to perform a water amount adjustment operation according to the coil temperature and the outlet water temperature comprise: determining a first outlet water temperature interval in which the outlet water temperature is located; controlling the compressor to perform a frequency adjustment operation and controlling the water amount control unit to perform a water amount adjustment operation according to the coil temperature and the first outlet water temperature interval. The method of claim 22, wherein the controlling the compressor to perform a frequency adjustment operation and the water amount control unit to perform a water amount adjustment operation according to the coil temperature and the first outlet water temperature interval comprises: controlling the compressor to perform a first frequency adjustment operation and the water amount control unit to perform a first water amount adjustment operation according to the first outlet water temperature interval, if the coil temperature is greater than the first temperature threshold and less than or equal to a third temperature threshold; controlling the compressor to perform a second frequency adjustment operation and the water amount control unit to perform a second water amount adjustment operation according to the first outlet water temperature interval, if the coil temperature is greater than the third temperature threshold and less than or equal to a second temperature threshold; wherein the first frequency adjustment operation is different from the second frequency adjustment operation, and / or the first water amount adjustment operation is different from the second water amount adjustment operation. The method of claim 23, wherein the target outlet water temperature interval belongs to a sub-interval greater than a fourth temperature threshold and less than or equal to a fifth temperature threshold; wherein the first frequency adjustment operation comprises reducing the frequency of the compressor and the first water amount adjustment operation comprises prohibiting the increase of the water amount of the second heat exchanger, if the first outlet water temperature interval is greater than the fifth temperature threshold; wherein the first frequency adjustment operation comprises reducing the frequency of the compressor and the first water amount adjustment operation comprises reducing the water amount of the second heat exchanger, if the first outlet water temperature interval is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold; wherein the first frequency adjustment operation comprises prohibiting the increase of the frequency of the compressor and the first water amount adjustment operation comprises reducing the water amount of the second heat exchanger, if the first outlet water temperature interval is less than or equal to the fourth temperature threshold. The method of claim 23, wherein the target outlet water temperature interval belongs to a sub-interval greater than a fourth temperature threshold and less than or equal to a fifth temperature threshold; wherein the second frequency adjustment operation comprises reducing the frequency of the compressor and the second water amount adjustment operation comprises prohibiting the decrease of the water amount of the second heat exchanger, if the first outlet water temperature interval is greater than the fifth temperature threshold; wherein the second frequency adjustment operation comprises prohibiting the increase of the frequency of the compressor and the second water amount adjustment operation comprises reducing the water amount of the second heat exchanger, if the first outlet water temperature interval is greater than the fourth temperature threshold and less than or equal to the fifth temperature threshold; wherein the second frequency adjustment operation comprises prohibiting the decrease of the frequency of the compressor and the second water amount adjustment operation comprises reducing the water amount of the second heat exchanger, if the first outlet water temperature interval is less than or equal to the fourth temperature threshold. The method of any one of claims 21-25, further comprising: controlling the compressor to stop running, if the coil temperature is less than or equal to the first temperature threshold. The method according to any one of claims 21-26, after the controlling the compressor to perform the frequency adjustment operation and the controlling the water amount control unit to perform the water amount adjustment operation, the method further comprises: After waiting for the first time length, re-executing the steps of collecting the coil temperature corresponding to the first heat exchanger by the first temperature sensor and collecting the outlet water temperature corresponding to the second heat exchanger by the second temperature sensor. The method according to claim 27, the method further comprises: If it is detected that the coil temperature corresponding to the first heat exchanger is greater than the second temperature threshold, the freeze protection mode is released, the compressor is controlled to return to the working state before performing the frequency adjustment operation, and the water amount control unit is controlled to return to the working state before performing the water amount adjustment operation. The method according to any one of claims 21-26, the controlling the compressor to perform the frequency adjustment operation and the controlling the water amount control unit to perform the water amount adjustment operation according to the coil temperature and the outlet water temperature comprises: According to the coil temperature and the outlet water temperature, determining a target frequency and a target water inlet amount; Controlling the compressor to adjust the frequency of the compressor to the target frequency; Controlling the water amount control unit to adjust the water inlet amount of the second heat exchanger to the target water inlet amount. The method according to any one of claims 21-26, the controlling the compressor to perform the frequency adjustment operation and the controlling the water amount control unit to perform the water amount adjustment operation according to the coil temperature and the outlet water temperature comprises: According to the coil temperature and the outlet water temperature, determining a frequency adjustment direction and a water inlet amount adjustment direction; Controlling the compressor to adjust the frequency of the compressor according to a preset frequency step and the frequency adjustment direction; Controlling the water amount control unit to adjust the water inlet amount of the second heat exchanger according to a preset water inlet amount step and the water inlet amount adjustment direction. The method of any one of claims 21-30, wherein the water amount control unit comprises a plurality of water amount control valves respectively corresponding to different water inlet amounts. The method according to any one of claims 21-26, the controlling the water amount control unit to perform the water amount adjustment operation according to the coil temperature and the outlet water temperature comprises: According to the coil temperature and the outlet water temperature, determining a target water amount control valve from the plurality of water amount control valves; Controlling the target water amount control valve to be opened, and controlling other water amount control valves except the target water amount control valve from the plurality of water amount control valves to be closed, so that water is transmitted to the second heat exchanger through the target water amount control valve. The method according to any one of claims 21-31, the water-cooled air conditioner further comprises a hot water outlet and a drainage device; when the hot water outlet is opened, the drainage device is closed, and the water output by the second heat exchanger is output through the hot water outlet; When the hot water outlet is closed, the drainage device is opened, and the water output by the second heat exchanger is output through the drainage device. The method according to claim 32, wherein the drain device is in a closed state when a pipe pressure of a water outlet pipe of the second heat exchanger is less than a corresponding drain pressure of the drain device, and is in an open state when the pipe pressure of the water outlet pipe of the second heat exchanger is greater than the corresponding drain pressure of the drain device. A water-cooled air conditioner comprises: a compressor configured to compress refrigerant; a second heat exchanger configured to exchange heat between the refrigerant and water; a first heat exchanger configured to exchange heat between the refrigerant and air; a water amount control unit configured to adjust an amount of water supplied to the second heat exchanger; a first temperature sensor configured to acquire a temperature of a coil corresponding to the first heat exchanger; a second temperature sensor configured to acquire a temperature of water corresponding to the second heat exchanger; a controller configured to acquire the temperature of the coil and the temperature of the water, and, when the temperature of the coil is greater than a first temperature threshold and less than or equal to a second temperature threshold, control the compressor to perform a frequency adjustment operation and control the water amount control unit to perform a water amount adjustment operation according to the temperature of the coil and the temperature of the water, so as to increase the temperature of the coil and make the temperature of the water tend to a target water temperature range. The application discloses an air conditioner anti-freezing device, which is applied to a water-cooled air conditioner. The water-cooled air conditioner comprises a compressor, a second heat exchanger, a first heat exchanger, a first temperature sensor, a second temperature sensor and a water quantity control unit. The compressor is used for compressing refrigerant. The second heat exchanger is used for heat exchanging between refrigerant and water. The first heat exchanger is used for heat exchanging between refrigerant and air. The water quantity control unit is used for adjusting water inlet quantity of the second heat exchanger. The air conditioner anti-freezing device comprises: a first acquisition module configured to acquire the temperature of the coil corresponding to the first heat exchanger by using the first temperature sensor; a second acquisition module configured to acquire the temperature of the water corresponding to the second heat exchanger by using the second temperature sensor; an anti-freezing control module configured to, when the temperature of the coil is greater than a first temperature threshold and less than or equal to a second temperature threshold, control the compressor to perform a frequency adjustment operation and control the water amount control unit to perform a water amount adjustment operation according to the temperature of the coil and the temperature of the water, so as to increase the temperature of the coil and make the temperature of the water tend to a target water temperature range. A water-cooled air conditioner comprises a memory and a processor, and the memory stores a computer program which, when executed by the processor, causes the processor to implement the method according to any one of claims 21-33. A computer readable storage medium stores a computer program which, when executed by a processor, implements the method according to any one of claims 21-33.

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