Water-cooling air conditioner and control method

Abstract

The invention discloses a water-cooling air conditioner and a control method, and relates to the technical field of air conditioners, a controller of the water-cooling air conditioner is configured to adjust the water flow of a cold water inlet based on the difference value T between the refrigerant outlet temperature T cold outlet and the cold water inlet temperature T water inlet: when T is in a set temperature interval, the water flow of the cold water inlet is maintained; when T exceeds the set temperature interval, the water flow of the cold water inlet is increased; and when T is lower than the set temperature interval, the water flow of the cold water inlet is reduced. According to the water-cooling air conditioner and the control method, the T is limited within the adaptive range, so that the water-cooling air conditioner can keep the appropriate water flow in the running process of the water-cooling air conditioner, it is guaranteed that the heat exchange efficiency of refrigeration circulation can be within the efficient interval, and waste of water resources is avoided.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a water-cooled air conditioner and its control method. Background Technology

[0002] Air conditioning refers to equipment that uses artificial means to regulate and control parameters such as temperature, humidity, and airflow within a building or structure. The kitchen is a space found in every household. Users utilize various cooking appliances in the kitchen, and the heat generated by these appliances raises the kitchen temperature, potentially causing discomfort for the user.

[0003] Currently, some kitchens are equipped with water-cooled air conditioners, which use water-cooled heat exchangers to output cool air and control the ambient temperature. The evaporator end of the water-cooled heat exchanger is typically equipped with a fan, which draws in air to exchange heat with the evaporator end, thus outputting cool air to the kitchen. The condenser end of the water-cooled heat exchanger is water-cooled, using tap water for heat exchange to produce hot water for the user.

[0004] The heat exchange at the condenser end of a water-cooled air conditioner directly affects its normal operation. However, most existing water-cooled air conditioners analyze and judge the heat exchange at the condenser end based on the inlet and outlet water flow. When the user does not need hot water, the water-cooled air conditioner does not produce water, making it difficult for existing systems to judge the heat exchange at the condenser end under these conditions, leading to abnormal operation or water waste. Summary of the Invention

[0005] The purpose of this invention is to provide a water-cooled air conditioner and a control method, which can maintain the detection of water flow on the condenser side even when the air conditioner is not outputting hot water, thereby solving the problem that existing water-cooled air conditioners have difficulty detecting the water flow on the condenser side when hot water is not output.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A water-cooled air conditioner, comprising:

[0008] compressor;

[0009] A water-side heat exchanger, which is configured to receive refrigerant output from the compressor and condense the refrigerant;

[0010] An air-side heat exchanger is configured to receive refrigerant output from the water-side heat exchanger and return the refrigerant to the compressor after evaporation to form a refrigeration cycle.

[0011] A fan capable of introducing air and exchanging heat between the air and the air-side heat exchanger; and the water-side heat exchanger further includes:

[0012] A cold water inlet is located near the refrigerant outlet of the water-side heat exchanger and is capable of introducing external water into the water-side heat exchanger for heat exchange with the refrigerant.

[0013] A hot water outlet, capable of outputting the hot water generated after heat exchange to the outside of the water-side heat exchanger; and...

[0014] A controller capable of controlling the inflow rate of the cold water inlet; and the controller is configured to:

[0015] Obtain the first preset temperature T1 and the second preset temperature T2, ensuring that T2 < T1; obtain the refrigerant outlet temperature T of the water-side heat exchanger. 冷出 and cold water inlet temperature T 入水 And obtain the refrigerant outlet temperature T 冷出 and cold water inlet temperature T 入水 The difference ΔT, ΔT = T 冷出 -T 入水 ;

[0016] When T2≤△T≤T1, the water-cooled air conditioner maintains the inflow rate of the cold water inlet;

[0017] When △T < T2, the water-cooled air conditioner reduces the amount of cold water entering the cold water inlet;

[0018] When T1 < ΔT, the water-cooled air conditioner increases the amount of cold water entering the inlet.

[0019] In some implementations, the controller is further configured to:

[0020] Obtain the first preset time t1;

[0021] When the water-cooled air conditioner receives an activation signal, the operating frequency of the fan is acquired, and the fan is operated at the activated operating frequency. Furthermore, after the water-cooled air conditioner has been running for a first preset time t1, the indoor ambient temperature T is collected. 环 .

[0022] In some implementations, the controller is further configured to:

[0023] Obtain the second preset time t2;

[0024] Based on the collected indoor ambient temperature T 环 The operating frequency of the blower is matched with the inflow rate of the cold water inlet to form initial operating parameters;

[0025] The water-cooled air conditioner is operated with initial operating parameters for a second preset time t2.

[0026] In some implementations, the controller is further configured to:

[0027] Set the operating frequencies of multiple wind turbines and arrange the multiple operating frequencies in sequence;

[0028] Set the inflow rate of multiple cold water inlets, arrange the multiple inflow rates in sequence, and make each inflow rate correspond one-to-one with each operating frequency;

[0029] Obtain the first preset ambient temperature T 环1 Second preset ambient temperature T 环2 and make T 环2 <T 环1 ;

[0030] In T 环1 <T 环 In this case, based on the operating frequency of the fan, the water inflow is matched sequentially, and the matched water inflow is configured to the water-side heat exchanger.

[0031] In T 环2 ≤T 环 ≤T 环1 In this case, based on the operating frequency of the fan, the water inflow is matched in descending order, and the matched water inflow is configured to the water-side heat exchanger; and the maximum water inflow obtained by the descending matching is taken as the first limit water inflow.

[0032] In T 环 <T 环2 In the case of the fan being activated, the water inflow is matched in descending order based on the operating frequency of the fan, so that the matched water inflow is less than the first limit water inflow, and the matched water inflow is configured to the water-side heat exchanger.

[0033] In some embodiments, an adjusting device is provided upstream of the cold water inlet along the water flow direction to adjust the inflow rate of the cold water inlet, and...

[0034] The regulating device can adjust the pipe area connected to the cold water inlet to increase or decrease the water flow rate at the cold water inlet.

[0035] In some implementations, the controller is further configured to:

[0036] Obtain the first preset duct temperature T 内1 Second preset duct temperature T 内2 and the temperature T of the air-side heat exchanger 内盘and make T 内2 <T 内1 ;

[0037] In T 内盘 <T 内1 In this case, the water-cooled air conditioner reduces the amount of water entering the cold water inlet;

[0038] In T 内盘 <T 内2 In this case, the compressor is stopped from operating.

[0039] In some implementations, the controller is further configured to:

[0040] Obtain the third preset time t3;

[0041] In T 内盘 <T 内2 In this case, the fan is kept running at the current operating frequency, and the compressor is stopped for a third preset time t3 before restarting.

[0042] In some implementations, the controller is further configured to:

[0043] Obtain the first preset outlet water temperature T 出1 Second preset outlet water temperature T 出2 and the temperature T of the hot water outlet 出水 and make T 出2 <T 出1 ;

[0044] In T 出2 <T 出水 <T 出1 In this case, the water-cooled air conditioner reduces the amount of water entering the cold water inlet;

[0045] In T 出水 <T 出2 In this case, the water-cooled air conditioner maintains the inflow rate of the cold water inlet;

[0046] In T 出水 >T 出1 In this case, the compressor is stopped from operating.

[0047] In some implementations, the controller is further configured to:

[0048] Obtain the third preset time t3;

[0049] In T 出水 >T 出1 In this case, the fan is kept running at the current operating frequency, and the compressor is stopped for a third preset time t3 before restarting.

[0050] Based on the aforementioned water-cooled air conditioner, this application proposes a control method for a water-cooled air conditioner, which includes the following steps:

[0051] The refrigerant circulates between the compressor, the water-side heat exchanger, and the air-side heat exchanger to form a refrigeration cycle. Additionally, an external water source enters the water-side heat exchanger to exchange heat with the refrigerant inside the water-side heat exchanger.

[0052] Obtain the first preset temperature T1 and the second preset temperature T2, ensuring that T2 < T1; obtain the refrigerant outlet temperature T of the water-side heat exchanger. 冷出 and cold water inlet temperature T 入水 And obtain the refrigerant outlet temperature T 冷出 and cold water inlet temperature T 入水 The difference ΔT, ΔT = T 冷出 -T 入水 ;as well as,

[0053] When T2≤△T≤T1, the water-cooled air conditioner maintains the inflow rate of the cold water inlet;

[0054] When △T < T2, the water-cooled air conditioner reduces the amount of cold water entering the cold water inlet;

[0055] When T1 < ΔT, the water-cooled air conditioner increases the amount of cold water entering the inlet.

[0056] Compared with the prior art, the water-cooled air conditioner and control method of this invention have the following advantages:

[0057] This water-cooled air conditioner utilizes a water-side heat exchanger and an air-side heat exchanger to exchange heat between water and refrigerant, fulfilling the dual needs of a kitchen environment for both cool air and hot water. Furthermore, the larger the inflow of cold water at the inlet, the greater the total amount of water undergoing heat exchange within the water-side heat exchanger. During heat exchange, the water absorbs more heat from the refrigerant, resulting in a lower refrigerant temperature output from the outlet after heat exchange. Moreover, the proximity of the cold water inlet and refrigerant outlet allows for heat exchange between the water and refrigerant near these locations, thus lowering the refrigerant outlet temperature T. 冷出 and cold water inlet temperature T 入水 The difference ΔT can effectively reflect the water flow rate at the chilled water inlet of the water-cooled air conditioner. This is achieved by measuring the refrigerant outlet temperature T. 冷出 and cold water inlet temperature T 入水The difference ΔT is limited to a suitable range, enabling the water-cooled air conditioner of this application to control the water flow rate at the cold water inlet. The water-cooled air conditioner can maintain a suitable water flow rate during operation, ensuring that the heat exchange efficiency of the refrigeration cycle is in a high-efficiency range and avoiding water waste.

[0058] Furthermore, the water-cooled air conditioner of this application can collect the required temperature parameters and control the water flow during the operation of the water-cooled air conditioner based on these temperature parameters. This enables the water-cooled air conditioner to achieve antifreeze protection, prevent excessively high outlet water temperature, and match the appropriate water flow to the water-side heat exchanger after the compressor starts, so that the water-cooled air conditioner can quickly enter a state of high-efficiency operation. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of a water-cooled air conditioner according to an embodiment of this application;

[0060] Figure 2 This is a connection diagram of the water-cooled air conditioner in the embodiments of this application;

[0061] Figure 3 This is a connection diagram of another example of a water-cooled air conditioner in the embodiments of this application;

[0062] Figure 4 This is a schematic diagram illustrating the steps of the controller controlling the water flow rate of the cold water inlet based on the difference ΔT in the embodiment of this application;

[0063] Figure 5 This is a schematic diagram of the controller connection in the embodiment of this application;

[0064] Figure 6 This is a flowchart illustrating the execution of the first example by the controller in the embodiments of this application;

[0065] Figure 7 This is a schematic diagram of the controller executing the second example in the embodiments of this application;

[0066] Figure 8 This is a flowchart illustrating the execution of the third example by the controller in the embodiments of this application;

[0067] Figure 9 This is a schematic diagram illustrating the configuration of wind speed and water flow rates in the embodiments of this application;

[0068] Figure 10 This is a flowchart illustrating the fourth example of controller execution in the embodiments of this application;

[0069] Figure 11 This is a flowchart illustrating the fifth example of controller execution in the embodiments of this application.

[0070] In the diagram, 100 represents a water-cooled air conditioner.

[0071] 1. Compressor; 2. Water-side heat exchanger; 20. Refrigerant inlet; 21. Refrigerant outlet; 22. Cold water inlet; 23. Hot water outlet; 3. Air-side heat exchanger; 4. Fan; 5. Throttling device; 6. Housing; 60. Air inlet; 61. Air outlet; 7. Controller; 8. Pressure drain device; 9. Regulating device; 90. Valve body; 10. Temperature sensor. Detailed Implementation

[0072] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0073] In the description of this application, it should be understood that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to that other element. The terms "mounted," "connected," and "attached" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements or the interaction between two elements. Those skilled in the art will understand the specific meaning of the above terms in this application according to the specific circumstances.

[0074] In the description of this application, it should be understood that the terms "height," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0075] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0076] In this application, the water-cooled air conditioner executes the refrigeration cycle through a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes such as compression, condensation, expansion, and evaporation, providing cooling or heating to the indoor space through the absorption or release of heat by the refrigerant, thereby regulating the temperature of the indoor space.

[0077] The compressor compresses refrigerant gas under high temperature and pressure 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 the heat is released to the surrounding environment through the condensation process.

[0078] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0079] The following is for reference. Figures 1-11 This application describes a water-cooled air conditioner 100 and its control method according to an embodiment. In this embodiment, the water-cooled air conditioner 100 includes a housing 6, which has an air inlet 60 and an air outlet 61. A compressor 1, a water-side heat exchanger 2, an air-side heat exchanger 3, and a fan 4 are disposed inside the housing. The water-side heat exchanger 2 has two pipes, one of which is used to transport refrigerant and the other is used to transport tap water. The two pipes are close to each other inside the water-side heat exchanger 2 so that the media flowing in the two pipes can exchange heat.

[0080] In this embodiment, compressor 1, one of the pipes of water-side heat exchanger 2, and air-side heat exchanger 3 are connected in sequence, allowing refrigerant to flow from compressor 1, flow within the refrigerant pipeline of water-side heat exchanger 2, evaporate in water-side heat exchanger 2, condense in air-side heat exchanger 3, and then return to compressor 1, forming the refrigeration cycle of this water-cooled air conditioner 100. Based on the refrigerant flow path, water-side heat exchanger 2 has a refrigerant inlet 20 and a refrigerant outlet 21. Refrigerant flows from refrigerant inlet 20 to refrigerant outlet 21 through water-side heat exchanger 2. Of course, in some examples, a throttling device 5 may be provided between water-side heat exchanger 2 and air-side heat exchanger 3 to control the refrigerant flow rate within the refrigeration cycle.

[0081] The air-side heat exchanger 3 is equipped with a fan 4. Driven by an electric motor (not shown in the figure), the fan 4 draws air from outside the water-cooled air conditioner 100 into the air-side heat exchanger 3, allowing the drawn air to exchange heat with the air-side heat exchanger 3 and be cooled. Furthermore, the fan 4 blows the cooled air into the room, providing cool air to the indoor users. To enhance the heat exchange effect between the air and the air-side heat exchanger 3, a coil structure can be used inside the air-side heat exchanger 3 for refrigerant circulation.

[0082] Another pipe of the water-side heat exchanger 2 is provided with a cold water inlet 22 and a hot water outlet 23. The cold water inlet 22 is close to the refrigerant outlet 21 of the water-side heat exchanger 2 and can introduce external water into the water-side heat exchanger 2 for heat exchange with the refrigerant. The hot water outlet 23 can output the hot water generated after heat exchange to the outside of the water-side heat exchanger 2. 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 connecting to the tap water pipe. Tap water flows into the water-side heat exchanger 2 from the cold water inlet 22, exchanges heat with the refrigerant to form hot water, and then flows out from the hot water outlet 23. Along the flow direction of the tap water, a pressure drainage device 8 is provided downstream of the hot water outlet 23 so that the water-side heat exchanger 2 can discharge the hot water after heat exchange from the system unit when the user does not use hot water.

[0083] This water-cooled air conditioner 100 is equipped with a controller 7 to control the inflow rate of the cold water inlet 22; and, as a first example of this embodiment, refer to Figure 6 Controller 7 is configured as follows:

[0084] Obtain the first preset temperature T1 and the second preset temperature T2, ensuring that T2 < T1; obtain the refrigerant outlet temperature T1 of the water-side heat exchanger 2. 冷出 and cold water inlet temperature 22T 入水 And obtain the refrigerant outlet temperature 21T 冷出 and cold water inlet temperature 22T 入水 The difference ΔT, ΔT = T 冷出 -T 入水 ;

[0085] Under the condition that T2≤△T≤T1, the water-cooled air conditioner 100 maintains the water inlet 22.

[0086] When △T < T2, reduce the amount of cold water entering the water-cooled air conditioner 100 at the cold water inlet 22;

[0087] When T1 < ΔT, increase the amount of cold water entering the water-cooled air conditioner 100 through the cold water inlet 22.

[0088] It is understandable that tap water and refrigerant flow in two separate pipes of the water-side heat exchanger 2. Because the two pipes are close to each other, heat exchange can occur between the tap water and the refrigerant within the water-side heat exchanger 2. During this heat exchange, the greater the flow rate of the tap water, the greater the total amount of tap water undergoing heat exchange within the water-side heat exchanger 2. Consequently, the tap water absorbs more heat from the refrigerant, and the temperature of the refrigerant after heat exchange within the water-side heat exchanger 2, i.e., the refrigerant outlet temperature T, will increase accordingly. 冷出 The lower the temperature, the lower the refrigerant outlet temperature (T21). 冷出 With cold water inlet temperature 22T 入水 It is even closer. Furthermore, since the cold water inlet 22 of the water-side heat exchanger 2 is close to the refrigerant outlet 21 of the water-side heat exchanger 2, the refrigerant near the refrigerant outlet 21 will exchange heat with the tap water near the cold water inlet 22. The refrigerant near the refrigerant outlet 21 represents the final state of the refrigerant in the water-side heat exchanger 2, and the temperature T at the refrigerant outlet 21 is... 冷出 The lower the refrigerant temperature, the lower the temperature of the refrigerant flowing to the air-side heat exchanger 3. This allows the refrigerant to absorb heat from the air more quickly in the air-side heat exchanger 3, resulting in higher heat exchange efficiency. Therefore, the larger the water flow rate, the lower the system pressure maintaining the refrigeration cycle, the lower the temperature of the refrigerant within the refrigeration cycle, the less work the compressor 1 needs to do, and the lower the overall power consumption of the water-cooled air conditioner 100.

[0089] Of course, while a large water flow can lower the temperature of the refrigerant in the cooling cycle, the efficiency of heat exchange between tap water and refrigerant is affected by factors such as the temperature difference between the two and the heat exchange time. Once the heat exchange efficiency between tap water and refrigerant reaches a certain limit, continuously increasing the water flow will not effectively improve the heat exchange efficiency between the two.

[0090] Furthermore, a certain temperature difference is required for heat exchange between tap water and refrigerant. Generally, the larger the temperature difference, the higher the heat exchange efficiency between tap water and refrigerant; conversely, the smaller the temperature difference, the lower the heat exchange efficiency. Since the refrigerant near refrigerant outlet 21 has reached its lowest temperature in the water-side heat exchanger 2, the area where heat exchange occurs between cold water inlet 22 and refrigerant outlet 21 is the area with the smallest temperature difference between the refrigerant and tap water, and also the area with the lowest heat exchange efficiency between the refrigerant and tap water in the water-side heat exchanger 2. Based on the refrigerant outlet 21 temperature T... 冷出 and cold water inlet temperature 22T 入水 The difference ΔT can be used to determine whether there is inefficient heat exchange between tap water and refrigerant: when the flow rate of cold water inlet 22 is large, the tap water absorbs more heat from the refrigerant, and the temperature T at refrigerant outlet 21 is higher. 冷出The ΔT value is low; when the water flow rate at the cold water inlet 22 is too large, the ΔT value is too low, resulting in low heat exchange efficiency between tap water and refrigerant, which easily leads to water waste. Therefore, the refrigerant outlet temperature T at 21 is low. 冷出 and cold water inlet temperature 22T 入水 The difference ΔT needs to be kept within a certain range.

[0091] Obviously, the flow rate of the cold water inlet 22 is related to the value of ΔT. Therefore, by controlling the ΔT value within a reasonable range, the water-cooled air conditioner 100 of this embodiment can ensure the heat exchange efficiency of the refrigerant in the refrigeration cycle, so that the refrigerant can always maintain a state of high-efficiency heat exchange. Moreover, by controlling the ΔT value within a reasonable range, the flow rate of the cold water inlet 22 can be matched with the operating state of the air conditioner, effectively avoiding the waste of water resources.

[0092] It is understandable 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 range. When ΔT is between the first preset temperature T1 and the second preset temperature T2, that is, when the water flow rate of the chilled water inlet 22 is matched with the operating frequency of the compressor 1, the refrigerant in the refrigeration cycle is in a state of efficient heat exchange, so the water-cooled air conditioner 100 can maintain the current water flow rate of the chilled water inlet 22.

[0093] When ΔT is too low, i.e., when ΔT < T2, the refrigerant outlet temperature T21 is... 冷出 and cold water inlet temperature 22T 入水 If the temperature difference is too small, the refrigerant and tap water are in an inefficient heat exchange state. The water flow rate of the cold water inlet 22 has exceeded the operating requirements of the water-cooled air conditioner 100, resulting in a waste of water resources. Therefore, under this condition, the water-cooled air conditioner 100 can reduce the amount of water entering the cold water inlet 22 until ΔT returns to between the first preset temperature T1 and the second preset temperature T2.

[0094] When ΔT is too large, i.e., when T1 < ΔT, the refrigerant outlet temperature T21 冷出 and cold water inlet temperature 22T 入水 The temperature difference is large, but due to insufficient water flow at the cold water inlet 22, the total heat exchange between the tap water and the refrigerant is insufficient, causing the compressor 1 to need to do extra work to maintain the current refrigeration cycle. Therefore, under this condition, the water-cooled air conditioner 100 can increase the water flow at the cold water inlet 22 until ΔT returns to between the first preset temperature T1 and the second preset temperature T2.

[0095] Based on the aforementioned water-cooled air conditioner 100, refer to Figure 4This is a flowchart illustrating the operation performed by controller 7 in this embodiment. Controller 7 is specifically configured to include steps S1 to S5:

[0096] S1. The refrigerant circulates between the compressor 1, the water-side heat exchanger 2, and the air-side heat exchanger 3 to form a refrigeration cycle. Additionally, external water is introduced into the water-side heat exchanger 2 to exchange heat with the refrigerant inside the water-side heat exchanger 2.

[0097] S2. Obtain the first preset temperature T1 and the second preset temperature T2, and ensure that T2 < T1; Obtain the refrigerant outlet temperature T1 of the water-side heat exchanger 2. 冷出 and cold water inlet temperature 22T 入水 And obtain the refrigerant outlet temperature 21T 冷出 and cold water inlet temperature 22T 入水 The difference ΔT, ΔT = T 冷出 -T 入水 ;

[0098] S3. When T2≤△T≤T1, maintain the water inlet flow rate of the water-cooled air conditioner 100 at the cold water inlet 22.

[0099] S4. When △T < T2, reduce the amount of cold water entering the water-cooled air conditioner 100 at the cold water inlet 22.

[0100] S5. When T1 < △T, increase the amount of cold water entering the water-cooled air conditioner 100 through the cold water inlet 22.

[0101] It should be noted that steps S3-S5 have no specific order.

[0102] Based on the above control, the water-cooled air conditioner 100 enables the controller 7 to utilize the refrigerant outlet 21 temperature T 冷出 and cold water inlet temperature 22T 入水 The difference ΔT is used to determine whether the water flow rate at the cold water inlet 22 meets the requirements of the current refrigeration cycle. Of course, the water-cooled air conditioner 100 can adjust the water flow rate at the cold water inlet 22 by setting operating levels, such as water flow rates C1, C2, C3, etc.

[0103] For example, the water flow rate settings are C1, C2, and C3, with C1 > C2 > C3. When the water-cooled air conditioner 100 is currently operating at setting C2, the controller 7 obtains the refrigerant outlet temperature T of the water-side heat exchanger 21. 冷出 and cold water inlet temperature 22T 入水 And obtain the refrigerant outlet temperature 21T 冷出 and cold water inlet temperature 22T 入水 The difference ΔT, ΔT = T 冷出 -T 入水Furthermore, the controller 7 determines the region of ΔT based on the first preset temperature T1 and the second preset temperature T2: when T2≤ΔT≤T1, the water-cooled air conditioner 100 is kept running at C2 level; when ΔT<T2, the water-cooled air conditioner 100 is adjusted to C3 level; when T1<ΔT, the water-cooled air conditioner 100 is adjusted to C1 level.

[0104] Furthermore, an adjustment device 9 can be installed upstream of the cold water inlet 22 along the direction of water flow to adjust the flow rate of the cold water inlet 22. For example, the adjustment device 9 can consist of two valve bodies 90 arranged in parallel, allowing for three water flow rate settings by selectively opening one valve body 90 or simultaneously activating both valve bodies 90. In this way, the water-cooled air conditioner 100 can adjust the pipe area connected to the cold water inlet 22 by switching the operating state of the valve bodies 90, thereby increasing or decreasing the water inlet of the cold water inlet 22 and conveniently adjusting the water flow rate of the cold water inlet 22 based on the ΔT value.

[0105] It is understandable that when the water-cooled air conditioner 100 is initially started, the compressor 1 has not yet performed its work or has not yet performed its work completely, and the refrigerant outlet temperature T is... 冷出 and cold water inlet temperature 22T 入水 It cannot accurately reflect the operating status of the refrigeration cycle, such as the operating frequency of compressor 1 and the temperature of the refrigerant. Therefore, during the initial startup period of the water-cooled air conditioner 100, the water-cooled air conditioner 100 can be run for a period of time before the controller 7 adjusts the water flow rate of the chilled water inlet 22 based on the ΔT value. As a second example of this embodiment, refer to... Figure 7 Controller 7 is also configured as follows:

[0106] Obtain the first preset time t1 and the operating frequency of fan 4 when it is activated;

[0107] When the water-cooled air conditioner 100 receives an activation signal, it acquires the operating frequency of the fan 4 and enables the fan 4 to operate at the activated operating frequency. After the water-cooled air conditioner 100 has been running for a first preset time t1, it collects the indoor ambient temperature T. 环 .

[0108] 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 operating state after running for the first preset time t1. Furthermore, the operating frequency used by the fan 4 can be a user-selected frequency, which can be displayed as a fan speed setting on the controller 7 / remote control. Of course, the operating frequency used by the fan 4 can also be the default operating frequency set by the water-cooled air conditioner 100 itself; for example, the water-cooled air conditioner 100 can operate the fan 4 at its maximum operating frequency / maximum fan speed setting after receiving an activation signal.

[0109] After the water-cooled air conditioner 100 enters stable operation, the compressor 1 begins to work steadily, and the refrigeration cycle formed by the compressor 1, water-side heat exchanger 2, and air-side heat exchanger 3 begins to operate stably. At this time, the water-cooled air conditioner 100 can adjust the water flow rate of the chilled water inlet 22 so that the water flow rate of the chilled water inlet 22 can automatically match the operating frequency of the compressor 1, allowing the water-cooled air conditioner 100 to enter a high-efficiency operating state. As a third example of this embodiment, refer to... Figure 8 Controller 7 is also configured as follows:

[0110] Obtain the second preset time t2; based on the collected indoor ambient temperature T 环 In addition to adjusting the operating frequency of fan 4, the inflow rate of cold water inlet 22 is adjusted so that the inflow rate of cold water inlet 22 is in line with the operating frequency of fan 4 and the collected indoor ambient temperature T. 环 Matching them to form initial operating parameters; causing the water-cooled air conditioner 100 to run with the initial operating parameters for a second preset time t2.

[0111] It is understandable that the water inflow rate of cold water inlet 22 is related to the operating frequency of fan 4 and the collected indoor ambient temperature T. 环 It can be matched and configured according to the specifications and performance of the water-cooled air conditioner 100. The configuration is based on the operating frequency of fan 4 and the indoor ambient temperature T. 环 The flow rate of cold water at inlet 22 is matched to the operating frequency of compressor 1, enabling the water-cooled air conditioner 100 to operate at high efficiency. Specifically, controller 7 can be configured as follows:

[0112] Set the operating frequencies of multiple fans 4 and arrange the multiple operating frequencies in sequence;

[0113] Set the inflow rate of multiple cold water inlets 22, and arrange the multiple inflow rates in sequence, with each inflow rate corresponding to each operating frequency.

[0114] Obtain the first preset ambient temperature T 环1 Second preset ambient temperature T 环2 and make T 环2 <T 环1 ;

[0115] In T 环1 <T 环 In this case, based on the operating frequency of the fan 4, the water inflow is matched sequentially, and the matched water inflow is configured to the water-side heat exchanger 2.

[0116] In T 环2 ≤T 环 ≤T 环1In this case, based on the operating frequency of the fan 4, the water inflow is matched in descending order, and the matched water inflow is configured to the water-side heat exchanger 2; and the maximum water inflow obtained by the descending matching is taken as the first limit water inflow.

[0117] In T 环 <T 环2 In this case, based on the operating frequency of the fan 4, the water inflow is matched in descending order so that the matched water inflow is less than the first limit water inflow, and the matched water inflow is configured to the water-side heat exchanger 2.

[0118] Understandably, to meet user needs, water-cooled air conditioners 100 are generally equipped with multiple fan speeds 4, which can be controlled and switched by the user, such as high speed, medium speed, and low speed. The fan speeds at different speeds are generally arranged in descending or ascending order. Furthermore, based on the flow control requirements of the water-side heat exchanger 2, water-cooled air conditioners 100 are generally also equipped with multiple chilled water inlets 22, i.e., water flow rates, such as C1, C2, and C3. The water flow rates at different speeds are also generally arranged in descending or ascending order. Taking the fan speed settings of high speed, medium speed, and low speed, and the water flow rates of C1, C2, and C3 as an example, the water flow rate relationship from high to low is C1 > C2 > C3.

[0119] When configuring air conditioners, high fan speed generally corresponds to high flow rate; that is, high speed corresponds to water flow rate setting C1, medium speed to C2, and low speed to C3. Therefore, refer to... Figure 9 The controller 7 of this water-cooled air conditioner 100 is configured as follows:

[0120] Obtain the first preset ambient temperature T 环1 Second preset ambient temperature T 环2 and make T 环2 <T 环1 ;

[0121] In T 环1 <T 环 In the case of high speed, the water inlet volume is matched with the water flow rate setting C1; when medium speed is used, the water inlet volume is matched with the water flow rate setting C2; when low speed is used, the water inlet volume is matched with the water flow rate setting C3.

[0122] In T 环2 ≤T 环 ≤T 环1In the case where the fan 4 is in high speed mode, the water inflow rate is matched in descending order to the water flow rate setting C2; when the fan 4 is in medium speed mode, the water inflow rate is matched in descending order to the water flow rate setting C3; when the fan 4 is in low speed mode, the water inflow rate is matched in descending order to the water flow rate setting C3; at this time, the maximum water inflow rate obtained by descending order matching is the water flow rate setting C2, so the water flow rate setting C2 is taken as the first limit water inflow rate;

[0123] In T 环 <T 环2 In the case of the first limit water inflow being set to water flow rate C2, when the fan 4 is in high speed mode, the water inflow is matched and configured in descending order to water flow rate C3; when the fan 4 is in medium speed mode, the water inflow is matched and configured in descending order to water flow rate C3; when the fan 4 is in low speed mode, the water inflow is matched and configured in descending order to water flow rate C3.

[0124] It is understandable that the aforementioned descending order matching refers to the order from high to low in the gear settings. The operating frequency of fan 4 is not matched to its corresponding water flow rate setting, but rather to the next water flow rate setting. Taking the aforementioned example, when the indoor ambient temperature is within the set temperature range, and fan 4 is in high speed setting, the water inflow will be matched to water flow rate setting C1. However, when the indoor ambient temperature is not within the set temperature range, and fan 4 is in high speed setting, the water inflow will be matched to the next water flow rate setting, namely water flow rate setting C2.

[0125] Understandably, in descending order matching, the water inflow is limited to the minimum value achievable by the water flow rate setting. Taking the aforementioned example, when the indoor ambient temperature is within the set temperature range, and the fan speed is low, the water inflow will be matched to the water flow rate setting C3. However, when the indoor ambient temperature is not within the set temperature range, and the fan speed is low, although the water inflow will be matched in descending order, the minimum water flow rate setting within the water-cooled air conditioner 100 system is C3. The system cannot continue to descend the setting, so even when the fan speed is low, the water inflow will still be matched to the water flow rate setting C3.

[0126] Furthermore, it is understood that the aforementioned fan speed settings (high speed, medium speed, low speed) and water flow settings (C1, C2, C3) are merely illustrative examples used in this embodiment. The water-cooled air conditioner 100 can be configured with more fan speed settings and water flow settings, or adopt stepless speed regulation, depending on its own specifications, design, and performance requirements.

[0127] Based on the aforementioned configuration of controller 7, when the compressor 1 starts, the controller 7 can match a suitable water flow rate to the water-side heat exchanger 2 according to the indoor environment corresponding to the water-cooled air conditioner 100, so that the air conditioning system can quickly enter a state of high-efficiency operation. In this way, the compressor 1 can enter a stable operating state after starting, the refrigerant can always maintain a state of high-efficiency heat exchange, and the water flow rate of the cold water inlet 22 can match the operating state of the air conditioner, effectively avoiding the waste of water resources.

[0128] As the condenser of the water-cooled air conditioner 100, the air-side heat exchanger 3 may experience localized excessively low temperatures during prolonged operation of the air conditioner 100. Under these circumstances, the air ducts of the air-side heat exchanger 3 are prone to icing, leading to malfunctions in the water-cooled air conditioner 100. Therefore, the temperature of the air-side heat exchanger 3 should be monitored during the operation of the water-cooled air conditioner 100 to prevent the aforementioned situation from occurring. (Reference) Figure 10 As a fourth example of this embodiment, the controller 7 can be configured as follows:

[0129] Obtain the first preset duct temperature T 内1 Second preset duct temperature T 内2 And the temperature T of the air-side heat exchanger 3 内盘 and make T 内2 <T 内1 ;

[0130] In T 内盘 <T 内1 In this case, the water-cooled air conditioner 100 reduces the amount of cold water entering the cold water inlet 22;

[0131] In T 内盘 <T 内2 In this case, compressor 1 will stop running.

[0132] Understandably, the first preset duct temperature T 内1 Second preset duct temperature T 内2 These are two warning temperatures for the operation of the air-side heat exchanger 3. The temperature T of the air-side heat exchanger 3... 内盘 Reaching the first preset duct temperature T 内1 At this time, there is a certain risk of icing on the surface of the air-side heat exchanger 3. Therefore, the controller 7 can reduce the water flow rate at the chilled water inlet 22 of the water-cooled air conditioner 100. Taking the speed control as an example, the water flow rate speed of the chilled water inlet 22 can be reduced by one or more speeds to increase the pressure of the refrigeration cycle unit, thereby increasing the temperature T of the air-side heat exchanger 3. 内盘 Yes. Furthermore, if the temperature T of the air-side heat exchanger 3... 内盘 The temperature remains below the first preset duct temperature T. 内1At this time, the controller 7 can continuously reduce the amount of cold water entering the water-cooled air conditioner 100 through the cold water inlet 22 until the amount of cold water entering the cold water inlet 22 drops to the minimum value that the system can operate at. Meanwhile, the temperature T of the air-side heat exchanger 3... 内盘 Reaching the second preset duct temperature T 内2 At this time, the surface of the air-side heat exchanger 3 is at high risk of icing, so the controller 7 will stop the compressor 1 to prevent the refrigeration cycle unit from icing. At this time, because the temperature of the air-side heat exchanger 3 is very low, the fan 4 can continue to run at the currently activated operating frequency to continuously output cold air and maintain the temperature regulation of the indoor environment.

[0133] Of course, after compressor 1 stops running for a period of time, the temperature T of air-side heat exchanger 3 will... 内盘 It will rise back to the second preset duct temperature T 内2 Therefore, controller 7 can also be configured to: acquire a third preset time t3; at T 内盘 <T 内2 In this case, the fan 4 is kept running at the current operating frequency, and the compressor 1 is stopped for a third preset time t3 before restarting to maintain the effective operating time of the refrigeration cycle unit.

[0134] In the water-cooled air conditioner 100, the temperature of the refrigerant and the temperature of the hot water output by the water-side heat exchanger 2 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 water-side heat exchanger 2 will also increase. To prevent the user from being scalded by excessively high hot water output from the water-side heat exchanger 2, please refer to... Figure 11 As a fifth example of this embodiment, the controller 7 is further configured as follows:

[0135] 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 23 出水 and make T 出2 <T 出1 ;

[0136] 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 the cold water inlet 22;

[0137] 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 22;

[0138] In T 出水 >T 出1In this case, compressor 1 will stop running.

[0139] By monitoring the temperature T of the hot water outlet 23 of the water-side heat exchanger 2 出水 This water-cooled air conditioner 100 can adjust the temperature T of the hot water outlet 23 by regulating the inflow of cold water into the cold water inlet 22. 出水 At higher temperatures, the inflow rate of cold water at inlet 22 increases, thereby increasing the temperature T at hot water outlet 23. 出水 reduce.

[0140] Furthermore, if the temperature T of the hot water outlet 23 is... 出水 The water temperature remains consistently higher than the first preset outlet temperature T. 出1 At this time, the controller 7 can continuously increase the inflow rate of the cold water inlet 22 of the water-cooled air conditioner 100 until the inflow rate of the cold water inlet 22 drops to the maximum value that the system can operate at. Meanwhile, the temperature T at the hot water outlet 23... 出水 Reaching the second preset outlet water temperature T 出2 At that time, the hot water output by the water-side heat exchanger 2 is at a very high temperature, posing a significant risk of scalding to the user. Therefore, the controller 7 will stop the compressor 1 from running.

[0141] Of course, after the compressor 1 stops running for a period of time, the temperature T_outlet of the hot water outlet 23 will drop below the second preset outlet temperature T_outlet 2. Therefore, the controller 7 can also be configured to: acquire a third preset time t3; at T_outlet 2... 出水 >T 出1 In this case, the fan 4 is kept running at the current operating frequency, and the compressor 1 is stopped for a third preset time t3 before restarting.

[0142] It should be noted that the temperature parameters involved in this embodiment can be obtained by arranging temperature sensors 10 at the corresponding temperatures, and the collected temperature information can be transmitted to the controller 7 through the temperature sensors 10.

[0143] It should be noted that, Figure 1 The sequence of processes shown is not the only sequence that controller 7 can execute. Depending on the application scenario of the water-cooled air conditioner 100, controller 7 can adjust and analyze the indoor ambient temperature T. 环境 1. Air-side heat exchanger 3 temperature T 内盘 Hot water outlet temperature T 出水 Refrigerant outlet temperature 21T 冷出 and cold water inlet temperature 22T 入水 The order of the difference △T is used to form a new logical execution order.

[0144] In summary, the water-cooled air conditioner 100 provided in this application, by setting up a water-side heat exchanger 2 and an air-side heat exchanger 3, utilizes water and refrigerant for heat exchange, thus meeting the dual needs of a kitchen environment for both cold air and hot water. Furthermore, the larger the inflow rate of the cold water inlet 22, the greater the total amount of water undergoing heat exchange within the water-side heat exchanger 2. During heat exchange, the water absorbs more total heat from the refrigerant, resulting in a lower refrigerant temperature output from the refrigerant outlet 21 after heat exchange. Moreover, the proximity of the cold water inlet 22 and the refrigerant outlet 21 allows for heat exchange between the water and refrigerant near these locations, thus lowering the refrigerant outlet 21 temperature T. 冷出 and cold water inlet temperature 22T 入水 The difference ΔT can effectively reflect the water flow rate at the chilled water inlet 22 of the water-cooled air conditioner 100. This is achieved by measuring the refrigerant outlet temperature T... 冷出 and cold water inlet temperature 22T 入水 The difference ΔT is limited to a suitable range, so that the water-cooled air conditioner 100 of this application can control the water flow rate of the cold water inlet 22. 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.

[0145] Furthermore, the water-cooled air conditioner 100 of this application 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 water-side heat exchanger 2 after the compressor 1 starts, so that the water-cooled air conditioner 100 can quickly enter a state of high-efficiency operation.

[0146] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A water-cooled air conditioner, characterized in that, include: compressor; A water-side heat exchanger, which is configured to receive refrigerant output from the compressor and condense the refrigerant; An air-side heat exchanger is configured to receive refrigerant output from the water-side heat exchanger and return the refrigerant to the compressor after evaporation to form a refrigeration cycle. A fan, which is capable of introducing air and exchanging heat between the air and the air-side heat exchanger; Furthermore, the water-side heat exchanger also includes: A cold water inlet is located near the refrigerant outlet of the water-side heat exchanger and is capable of introducing external water into the water-side heat exchanger for heat exchange with the refrigerant. A hot water outlet, capable of outputting the hot water generated after heat exchange to the outside of the water-side heat exchanger; and... A controller capable of controlling the inflow rate of the cold water inlet; and the controller is configured to: Obtain the first preset temperature T1 and the second preset temperature T2, ensuring that T2 < T1; obtain the refrigerant outlet temperature T of the water-side heat exchanger. 冷出 and cold water inlet temperature T 入水 And obtain the refrigerant outlet temperature T 冷出 and cold water inlet temperature T 入水 The difference ΔT, ΔT = T 冷出 -T 入水 ; When T2≤△T≤T1, the water-cooled air conditioner maintains the inflow rate of the cold water inlet; When △T < T2, the water-cooled air conditioner reduces the amount of cold water entering the cold water inlet; When T1 < ΔT, the water-cooled air conditioner increases the amount of cold water entering the inlet.

2. The water-cooled air conditioner according to claim 1, characterized in that, Obtain the first preset time t1; When the water-cooled air conditioner receives an activation signal, the operating frequency of the fan is acquired, and the fan is operated at the activated operating frequency. Furthermore, after the water-cooled air conditioner has been running for a first preset time t1, the indoor ambient temperature T is collected. 环 .

3. The water-cooled air conditioner according to claim 1, characterized in that, The controller is also configured to: Obtain the second preset time t2; Based on the collected indoor ambient temperature T 环 The operating frequency of the blower is matched with the inflow rate of the cold water inlet to form initial operating parameters; The water-cooled air conditioner is operated with initial operating parameters for a second preset time t2.

4. The water-cooled air conditioner according to claim 3, characterized in that, The controller is also configured to: Set the operating frequencies of multiple wind turbines and arrange the multiple operating frequencies in sequence; Set the inflow rate of multiple cold water inlets, arrange the multiple inflow rates in sequence, and make each inflow rate correspond one-to-one with each operating frequency; Obtain the first preset ambient temperature T 环1 Second preset ambient temperature T 环2 and make T 环2 <T 环1 ; In T 环1 <T 环 In this case, based on the operating frequency of the fan, the water inflow is matched sequentially, and the matched water inflow is configured to the water-side heat exchanger. In T 环2 ≤T 环 ≤T 环1 In this case, based on the operating frequency of the fan, the water inflow is matched in descending order, and the matched water inflow is configured to the water-side heat exchanger; and the maximum water inflow obtained by the descending matching is taken as the first limit water inflow. In T 环 <T 环2 In the case of the fan being activated, the water inflow is matched in descending order based on the operating frequency of the fan, so that the matched water inflow is less than the first limit water inflow, and the matched water inflow is configured to the water-side heat exchanger.

5. The water-cooled air conditioner according to claim 1, characterized in that, Along the direction of water flow, an adjustment device is installed upstream of the cold water inlet to adjust the inflow rate of the cold water inlet. The regulating device can adjust the pipe area connected to the cold water inlet to increase or decrease the water flow rate at the cold water inlet.

6. The water-cooled air conditioner according to claim 1, characterized in that, The controller is also configured to: Obtain the first preset duct temperature T 内1 Second preset duct temperature T 内2 and the temperature T of the air-side heat exchanger 内盘 and make T 内2 <T 内1 ; In T 内盘 <T 内1 In this case, the water-cooled air conditioner reduces the amount of water entering the cold water inlet; In T 内盘 <T 内2 In this case, the compressor is stopped from operating.

7. The water-cooled air conditioner according to claim 6, characterized in that, The controller is also configured to: Get the third preset time t3 ; In T 内盘 <T 内2 In this case, the fan is kept running at the current operating frequency, and the compressor is stopped for a third preset time t3 before restarting.

8. The water-cooled air conditioner according to claim 1, characterized in that, The controller is also configured to: Obtain the first preset outlet water temperature T 出1 Second preset outlet water temperature T 出2 and the temperature T of the hot water outlet 出水 and make T 出2 <T 出1 ; In T 出2 <T 出水 <T 出1 In this case, the water-cooled air conditioner reduces the amount of water entering the cold water inlet; In T 出水 <T 出2 In this case, the water-cooled air conditioner maintains the inflow rate of the cold water inlet; In T 出水 >T 出1 In this case, the compressor is stopped from operating.

9. The water-cooled air conditioner according to claim 8, characterized in that, The controller is also configured to: Obtain the third preset time t3; In T 出水 >T 出1 In this case, the fan is kept running at the current operating frequency, and the compressor is stopped for a third preset time t3 before restarting.

10. A control method for a water-cooled air conditioner, characterized in that, The water-cooled air conditioner according to any one of claims 1-9 comprises: The refrigerant circulates between the compressor, the water-side heat exchanger, and the air-side heat exchanger to form a refrigeration cycle. Additionally, an external water source enters the water-side heat exchanger to exchange heat with the refrigerant inside the water-side heat exchanger. Obtain the first preset temperature T1 and the second preset temperature T2, ensuring that T2 < T1; obtain the refrigerant outlet temperature T of the water-side heat exchanger. 冷出 and cold water inlet temperature T 入水 And obtain the refrigerant outlet temperature T 冷出 and cold water inlet temperature T 入水 The difference ΔT, ΔT = T 冷出 -T 入水 ;as well as, When T2≤△T≤T1, the water-cooled air conditioner maintains the inflow rate of the cold water inlet; When △T < T2, the water-cooled air conditioner reduces the amount of cold water entering the cold water inlet; When T1 < ΔT, the water-cooled air conditioner increases the amount of cold water entering the inlet.

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