Control method of water-cooling cold water air conditioning unit and water-cooling cold water air conditioning unit

Abstract

The invention discloses a control method of a water-cooling cold water air conditioning unit and the water-cooling cold water air conditioning unit, the method is applied to the water-cooling cold water air conditioning unit, under the condition that the water-cooling cold water air conditioning unit is started, if a refrigeration instruction is detected, according to the relation between the cooling water inlet temperature and a preset first temperature and the relation between the cooling water inlet temperature and a preset second temperature, the water-cooling cold water air conditioning unit is started; different communication modes are switched among the components in the water-cooling cold water air conditioning unit, and corresponding different refrigeration operation modes are configured in different cooling water inlet temperature ranges, so that the refrigeration energy efficiency of a system of the water-cooling cold water air conditioning unit is improved.

Description

Technical Field

[0001] The present application relates to the field of HVAC technology, and in particular to a control method for a water-cooled chilled water air-conditioning unit and a water-cooled chilled water air-conditioning unit. Background Art

[0002] With the booming development of data services and the requirements of the national dual-carbon policy, the industry has higher and higher requirements for green data centers. Liquid cooling technology has the characteristics of one-time heat exchange and high heat exchange density. More and more data centers are considering using or cooperating with liquid cooling air conditioning units. Commonly used liquid cooling units include air-cooled chillers and water-cooled chillers, and water-cooled chillers are more commonly used because they do not require external fans and are less affected by ambient temperature.

[0003] However, the refrigeration energy efficiency of the water-cooled chiller system used in the related art is low. Summary of the invention

[0004] The embodiments of the present application provide a control method for a water-cooled chiller and a water-cooled chiller, which can improve the refrigeration energy efficiency of the system of the water-cooled chiller.

[0005] In a first aspect, an embodiment of the present application provides a control method for a water-cooled chilled water air-conditioning unit, which is applied to the water-cooled chilled water air-conditioning unit. The water-cooled chilled water air-conditioning unit includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a throttling component, a cooling water outlet, a cooling water inlet, a chilled water return port, and a chilled water outlet. The method includes:

[0006] When the water-cooled chiller air conditioner unit is turned on, if a cooling instruction for the water-cooled chiller air conditioner unit is detected, the cooling water inlet temperature of the water-cooled chiller air conditioner unit is obtained;

[0007] If the cooling water inlet temperature is less than or equal to the preset first temperature, the compressor is controlled to be turned off, the cooling water inlet, the third heat exchanger, and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, and the chilled water outlet are controlled to be connected in sequence;

[0008] If the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, the compressor is controlled to be turned on so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger, and the cooling water outlet are controlled to be connected in sequence, the cooling water inlet, the third heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence, wherein the preset second temperature is greater than the preset first temperature;

[0009] If the cooling water inlet temperature is greater than the preset second temperature, the compressor is controlled to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence.

[0010] In some embodiments, the water-cooled chiller air conditioning unit further includes: a proportional three-way valve, a first electric valve, a second electric valve and a third electric valve, wherein:

[0011] The proportional three-way valve is connected to the cooling water inlet, the first heat exchanger and the third heat exchanger, and is used to control the cooling water flow toward the first heat exchanger and the third heat exchanger;

[0012] The first electric valve is connected to the chilled water return port, the second electric valve, and the second heat exchanger, and is used to control the chilled water flow to the second heat exchanger;

[0013] The second electric valve is connected to the second heat exchanger, the third heat exchanger, the first electric valve, and the third electric valve, and is used to control the flow of chilled water toward the second heat exchanger;

[0014] The third electric valve is connected to the third heat exchanger, the chilled water outlet, and the second electric valve, and is used to control the chilled water flow toward the chilled water outlet.

[0015] In some embodiments, controlling the cooling water inlet, the third heat exchanger, and the cooling water outlet in the water-cooled chiller unit to be connected in sequence includes:

[0016] Control the proportional three-way valve to open proportionally in the direction of the third heat exchanger, so that the cooling water inlet, the third heat exchanger, and the cooling water outlet are connected in sequence;

[0017] In some embodiments, controlling the chilled water return port, the third heat exchanger, and the chilled water outlet in the water-cooled chiller unit to be connected in sequence includes:

[0018] The first electric valve is closed, the second electric valve is closed, and the third electric valve is opened, so that the chilled water return port, the third heat exchanger, and the chilled water outlet in the water-cooled chiller are connected in sequence.

[0019] In some embodiments, controlling the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence includes:

[0020] Control the proportional three-way valve to open proportionally toward the first heat exchanger according to a preset first ratio, so that the cooling water inlet, the first heat exchanger, and the cooling water outlet are connected in sequence;

[0021] In some embodiments, controlling the cooling water inlet, the third heat exchanger, and the cooling water outlet to be connected in sequence includes:

[0022] Control the proportional three-way valve to open proportionally toward the third heat exchanger according to a preset second ratio, so that the cooling water inlet, the third heat exchanger and the cooling water outlet are connected in sequence, and the preset second ratio is greater than the preset first ratio;

[0023] In some embodiments, controlling the chilled water return port, the third heat exchanger, the second heat exchanger, and the chilled water outlet to be connected in sequence includes:

[0024] The second electric valve is controlled to be opened, the first electric valve is controlled to be closed, and the third electric valve is controlled to be closed, so that the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet are connected in sequence.

[0025] In some embodiments, controlling the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence includes:

[0026] Control the proportional three-way valve to open proportionally in the direction of the first heat exchanger, so that the cooling water inlet, the first heat exchanger and the cooling water outlet are connected in sequence;

[0027] In some embodiments, controlling the chilled water return port, the second heat exchanger, and the chilled water outlet to be connected in sequence includes:

[0028] The first electric valve is controlled to be opened, the second electric valve is controlled to be closed, and the third electric valve is controlled to be closed, so that the chilled water return port, the second heat exchanger and the chilled water outlet are connected in sequence.

[0029] In some embodiments, the water-cooled chilled water air conditioning unit further includes a first temperature sensor, which is disposed at a cooling water inlet and is used to detect a cooling water inlet temperature in the water-cooled chilled water air conditioning unit.

[0030] In some embodiments, obtaining the cooling water inlet temperature in a water-cooled chiller includes:

[0031] The cooling water inlet temperature in the water-cooled chiller air-conditioning unit is obtained through the first temperature sensor.

[0032] In some embodiments, the water-cooled chilled water air conditioning unit further includes a second temperature sensor, which is disposed at the chilled water outlet and is used to detect the chilled water outlet temperature in the water-cooled chilled water air conditioning unit.

[0033] In some embodiments, detecting a cooling instruction for a water-cooled chiller includes:

[0034] The outlet temperature of chilled water in the water-cooled chiller air conditioner is obtained by a second temperature sensor;

[0035] If the chilled water outlet temperature is greater than the preset chilled water outlet temperature, a cooling command for the water-cooled chiller is triggered.

[0036] In some embodiments, detecting a cooling instruction for a water-cooled chiller includes:

[0037] A user-triggered cooling command for a water-cooled chiller is detected.

[0038] In a second aspect, an embodiment of the present application further provides a control device for a water-cooled chilled water air-conditioning unit, which is applied to the water-cooled chilled water air-conditioning unit. The water-cooled chilled water air-conditioning unit includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a throttling component, a cooling water outlet, a cooling water inlet, a chilled water return port, and a chilled water outlet. The control device for the water-cooled chilled water air-conditioning unit includes:

[0039] An acquisition module, for acquiring the cooling water inlet temperature of the water-cooled chiller air-conditioning unit when a cooling instruction for the water-cooled chiller air-conditioning unit is detected when the water-cooled chiller air-conditioning unit is turned on;

[0040] The first control module is used for controlling the compressor to be turned off, controlling the cooling water inlet, the third heat exchanger, and the cooling water outlet to be connected in sequence, and controlling the chilled water return port, the third heat exchanger, and the chilled water outlet to be connected in sequence if the cooling water inlet temperature is less than or equal to a preset first temperature;

[0041] The second control module is used for controlling the compressor to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, controlling the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence, controlling the cooling water inlet, the third heat exchanger and the cooling water outlet to be connected in sequence, and controlling the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet to be connected in sequence, if the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, wherein the preset second temperature is greater than the preset first temperature;

[0042] The third control module is used to control the compressor to start if the cooling water inlet temperature is greater than the preset second temperature, so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, control the cooling water inlet, the first heat exchanger and the cooling water outlet to be connected in sequence, and control the chilled water return port, the second heat exchanger and the chilled water outlet to be connected in sequence.

[0043] In a third aspect, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is run on a computer, the computer executes a control method for a water-cooled chilled water air-conditioning unit as provided in any embodiment of the present application.

[0044] In a fourth aspect, an embodiment of the present application further provides a water-cooled chilled water air-conditioning unit, comprising a processor and a memory, wherein the memory has a computer program, and the processor calls the computer program to execute a control method for the water-cooled chilled water air-conditioning unit as provided in any embodiment of the present application.

[0045] The technical solution provided in the embodiment of the present application is applied to a water-cooled chilled water air-conditioning unit. The water-cooled chilled water air-conditioning unit includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a throttling component, a cooling water outlet, a cooling water inlet, a chilled water return port, and a chilled water outlet. When the water-cooled chilled water air-conditioning unit is turned on, if a refrigeration instruction for the water-cooled chilled water air-conditioning unit is detected, the cooling water inlet temperature in the water-cooled chilled water air-conditioning unit is obtained; if the cooling water inlet temperature is less than or equal to a preset first temperature, the compressor is controlled to be turned off, the cooling water inlet, the third heat exchanger, and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, and the chilled water outlet are controlled to be connected in sequence; if the cooling water inlet temperature is greater than the preset first temperature and is less than or equal to the preset The second temperature is set, the compressor is controlled to be turned on so that the loop formed by the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger, and the cooling water outlet are controlled to be connected in sequence, the cooling water inlet, the third heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence, wherein the preset second temperature is greater than the preset first temperature; if the cooling water inlet temperature is greater than the preset second temperature, the compressor is controlled to be turned on and connected with the first heat exchanger, the throttling component, and the second heat exchanger in sequence, the cooling water inlet, the first heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence. Therefore, in the present application, when the water-cooled air-conditioning unit is turned on, if a cooling command is detected, different connection modes are switched between the components in the water-cooled air-conditioning unit according to the relationship between the cooling water inlet temperature and the preset first temperature and the preset second temperature, so as to configure corresponding different cooling operation modes under different cooling water inlet temperature ranges, thereby improving the cooling energy efficiency of the water-cooled chiller system. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1The first water-cooled chiller system diagram is provided for the water-cooled chiller air conditioning unit in the related art.

[0048] Figure 2 A second water-cooled chiller system diagram is provided for a water-cooled chiller air conditioning unit in the related art.

[0049] Figure 3 A system diagram of a water-cooled chiller provided in an embodiment of the present application.

[0050] Figure 4 A first flow chart of a control method for a water-cooled chiller air conditioning unit provided in an embodiment of the present application.

[0051] Figure 5 This is a system operation diagram of the natural cooling mode provided in an embodiment of the present application.

[0052] Figure 6 This is a system operation diagram of the hybrid refrigeration mode provided in an embodiment of the present application.

[0053] Figure 7 This is a system operation diagram of the compressor refrigeration mode provided in an embodiment of the present application.

[0054] Figure 8 A second flow chart of the control method of the water-cooled chiller air-conditioning unit provided in an embodiment of the present application.

[0055] Fig. 9 A schematic diagram of the structure of a control device for a water-cooled chiller air conditioning unit provided in an embodiment of the present application.

[0056] Fig.10 A first structural schematic diagram of a water-cooled chilled water air conditioning unit provided in an embodiment of the present application.

[0057] Fig.11 A second structural schematic diagram of a water-cooled chiller air conditioning unit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0059] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0060] With the booming development of data services and the requirements of the country's dual-carbon policy, the industry has increasingly higher requirements for green data centers. Liquid cooling technology has the characteristics of single heat exchange and high heat exchange density, and more and more data centers are considering using or cooperating with liquid cooling air-conditioning units. Commonly used liquid cooling units include air-cooled chillers and water-cooled chillers, and water-cooled chillers are more commonly used because they do not require an external fan and are less affected by ambient temperature. In order to improve the system energy efficiency of water-cooled chillers, plate heat exchangers are generally connected in series or in parallel in the system, with one end connected to the cooling water and the other end connected to the chilled water system. Low-temperature chilled water in special seasons is used to directly deliver cold water to the chilled water, so as to achieve the purpose of saving energy by using natural cold sources.

[0061] In the related technology, the water-cooled chiller unit uses a fluorine system refrigeration unit and a natural cooling unit in series, please refer to Figure 1 , wherein, compressor 101, first heat exchanger 102, throttling component 103, second heat exchanger 104, proportional three-way valve 201, third heat exchanger 202, cooling water inlet 10, cooling water outlet 20, chilled water return port 30 and chilled water outlet 40; black lines represent cooling water system flow, yellow lines represent fluorine system flow, blue lines represent chilled water system flow.

[0062] Figure 1 The following problems exist during the operation of the water-cooled chiller system diagram provided in:

[0063] 1. The water resistance of the chilled water system is large: Because the chilled water system process adopts a series method, when the unit is cooled by a separate fluorine system or a natural cooling unit, the chilled water system process still flows through another unit module. The water resistance of the entire chilled water system process is large, which is unfavorable to the energy efficiency of the entire system and cannot be avoided.

[0064] In addition, in the related technology, the water-cooled chiller unit also uses a fluorine system refrigeration unit and a natural cooling unit in parallel, please refer to Figure 2, wherein, compressor 101, first heat exchanger 102, throttling component 103, second heat exchanger 104, first proportional three-way valve 201, third heat exchanger 202, second proportional three-way valve 203, cooling water inlet 10, cooling water outlet 20, chilled water return port 30 and chilled water outlet 40; black lines represent cooling water system flow, yellow lines represent fluorine system flow, blue lines represent chilled water system flow.

[0065] Figure 2 Although the water-cooled chiller system diagram provided in the article can effectively reduce the water resistance of the chilled water system when using a single fluorine system for refrigeration or natural cooling for refrigeration, the following problems still exist during its operation:

[0066] 1. Flow distribution problem: During the transition season cooling, the chilled water flow needs to be distributed to the second heat exchanger 104 and the third heat exchanger 202. The flow of the chilled water system process "chilled water return port 30 - second proportional three-way valve 203 - third heat exchanger 202 - chilled water outlet 40" is lower than the design, which will reduce the cooling capacity of the third heat exchanger 202, that is, the natural cooling capacity is reduced;

[0067] 2. Refrigeration energy efficiency problem: During the transition season, the chilled water flow needs to be distributed to the second heat exchanger 104 and the third heat exchanger 202. The flow of the chilled water system process "chilled water return port 30 - second proportional three-way valve 203 - second heat exchanger 104 - chilled water outlet 40" is lower than the design. Therefore, the chilled water outlet temperature of the second heat exchanger 104 will be lower than the design, resulting in a decrease in the evaporation temperature of the fluorine system process "compressor 101 - first heat exchanger 102 - throttling component 103 - second heat exchanger 104", thereby affecting the overall energy efficiency under the mixed mode;

[0068] 3. The problem of outlet water temperature stability: During the transition season cooling, since the chilled water is cooled in two ways, the outlet water temperature of the chilled water is affected by the chilled water flow diverted by the second proportional three-way valve and the output power of the compressor 101. When the outlet water temperature of the whole machine is high and the system cooling capacity needs to be increased, the natural cooling cooling capacity can be increased by increasing the flow of "chilled water return port 30-second proportional three-way valve 203-third heat exchanger 202-chilled water outlet 40", or the mechanical cooling capacity can be increased by increasing the flow of "chilled water return port 30-second proportional three-way valve 203-second heat exchanger 104-chilled water outlet 40" in conjunction with the output power of the compressor 101. The flow regulation at both ends of the chilled water is reversed, so there are multiple combination states to achieve the target outlet water temperature, but at the same time, the outlet water temperature stability will be affected due to the diverse adjustment of the target; and the second heat exchanger 104 and the third heat exchanger 202 have different output chilled water temperatures, and there is a possibility of temperature difference in mixed water, which further affects the outlet water temperature stability.

[0069] In order to solve the defects existing in the above-mentioned related technologies, the embodiments of the present application provide a control method of a water-cooled chilled water air conditioning unit and a water-cooled chilled water air conditioning unit. The execution subject of the control method of the water-cooled chilled water air conditioning unit can be the control device of the water-cooled chilled water air conditioning unit provided in the embodiments of the present application, or an electronic device integrating the control device of the water-cooled chilled water air conditioning unit, for example, the electronic device can be a water-cooled chilled water air conditioning unit. The control device of the water-cooled chilled water air conditioning unit can be implemented in hardware or software.

[0070] Please refer to Figure 3 , Figure 3 A water-cooled chiller system diagram provided in an embodiment of the present application. Among them:

[0071] Compressor 101, first heat exchanger 102, throttling component 103, second heat exchanger 104, proportional three-way valve 201, third heat exchanger 202, first electric valve 203, second electric valve 204, third electric valve 205, first temperature sensor 206, second temperature sensor 207, cooling water inlet 10, cooling water outlet 20, chilled water return port 30 and chilled water outlet 40; black lines represent cooling water system flow, yellow lines represent fluorine system flow, and blue lines represent chilled water system flow.

[0072] The proportional three-way valve 201 is connected to the cooling water inlet 10 , the first heat exchanger 102 and the third heat exchanger 202 , and is used to control the cooling water flow toward the first heat exchanger 102 and the third heat exchanger 202 .

[0073] The first electric valve 203 is connected to the chilled water return port 30 , the second electric valve 204 , and the second heat exchanger 104 , and is used to control the chilled water flow to the second heat exchanger 104 .

[0074] The second electric valve 204 is connected to the second heat exchanger 104 , the third heat exchanger 202 , the first electric valve 203 , and the third electric valve 205 , and is used to control the flow of chilled water toward the second heat exchanger 104 .

[0075] The third electric valve 205 is connected to the third heat exchanger 202 , the chilled water outlet 40 , and the second electric valve 204 , and is used to control the chilled water flow toward the chilled water outlet 40 .

[0076] The water-cooled chiller air conditioning unit provided in this application includes a fluorine system, a cooling water system, and a chilled water system:

[0077] The fluorine system process includes a refrigeration compressor 101, a first heat exchanger 102, a throttling component 103 and a second heat exchanger 104. The first heat exchanger 102 can transfer the heat of the fluorine system to the cooling water system, and the second heat exchanger 104 can transfer the cooling capacity of the fluorine system to the chilled water system.

[0078] The cooling water system includes a first temperature sensor 206, a proportional three-way valve 201, a first heat exchanger 102, and a third heat exchanger 202. The cooling water system can adjust the cooling water flow to the first heat exchanger 102 and the third heat exchanger 202 through the proportional three-way valve 201, which can adjust the energy efficiency of the fluorine system and the natural cooling capacity.

[0079] The chilled water system includes a first electric valve 203, a second electric valve 204, a third electric valve 205, a second heat exchanger 104, a third heat exchanger 202, and a second temperature sensor 207. The switching combination of the first electric valve 203, the second electric valve 204, and the third electric valve 205 is used to switch the chilled water flow path, that is, switch the operating mode.

[0080] It should be noted that the water-cooled chilled water air conditioning unit provided in the present application is newly provided with a proportional three-way valve 201, a first electric valve 203, a second electric valve 204, and a third electric valve 205 compared to the related art. Through the combination of these switches, the water-cooled chilled water air conditioning unit provided in the present application has at least three operating modes, namely, a natural cooling mode, a mixed cooling mode, and a compressor cooling mode. Through these three operating modes, cooling is performed under different conditions, which can improve the overall energy consumption of the water-cooled chilled water air conditioning unit. Please refer to the following for specific descriptions.

[0081] Next, please refer to Figure 4 , Figure 4 A schematic diagram of a first flow chart of a control method for a water-cooled chiller air conditioner provided in an embodiment of the present application. The method is applied to a water-cooled chiller air conditioner, and the specific flow chart may be as follows:

[0082] S110: When the water-cooled chiller air-conditioning unit is turned on, if a cooling instruction for the water-cooled chiller air-conditioning unit is detected, then the cooling water inlet temperature of the water-cooled chiller air-conditioning unit is obtained.

[0083] The refrigeration instruction may be a refrigeration instruction triggered by a user for the water-cooled chiller, or may be a refrigeration instruction triggered by the water-cooled chiller when the water-cooled chiller detects that the chilled water outlet temperature is greater than a preset chilled water outlet temperature. The preset chilled water outlet temperature may be set by a person skilled in the art according to refrigeration needs.

[0084] In this embodiment, when the water-cooled chiller air-conditioning unit detects a cooling instruction, the cooling water inlet temperature in the water-cooled chiller air-conditioning unit is obtained.

[0085] When obtaining the cooling water inlet temperature, a temperature sensor may be provided at the cooling water inlet to detect the cooling water inlet temperature. For example, please refer to Figure 3The first temperature sensor 206 is arranged at the cooling water inlet for detecting the cooling water inlet temperature in the water-cooled chiller. The water-cooled chiller detects the cooling water inlet temperature through the first temperature sensor 206. The first temperature sensor can be arranged in the pipeline or attached to the pipeline, and any arrangement method that can collect the cooling water temperature is acceptable.

[0086] S120. If the cooling water inlet temperature is less than or equal to the preset first temperature, the compressor is controlled to be turned off, the cooling water inlet, the third heat exchanger, and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, and the chilled water outlet are controlled to be connected in sequence.

[0087] The preset first temperature is generally less than 19 degrees Celsius, and can be specifically set by technicians in this field according to actual refrigeration needs.

[0088] Step S120 corresponds to the natural cooling mode in the operating mode of the water-cooled chiller air-conditioning unit provided in the present application.

[0089] Specifically, please refer to Figure 5 , Figure 5 A system operation diagram of the natural cooling mode provided in an embodiment of the present application. In the natural cooling mode, the proportional three-way valve 201 is controlled to open proportionally in the direction of the third heat exchanger 202, so that the cooling water inlet 10, the third heat exchanger 202, and the cooling water outlet 20 are connected in sequence. The first electric valve 203 is controlled to be closed, the second electric valve 204 is controlled to be closed, and the third electric valve 205 is controlled to be opened, so that the chilled water return port 30, the third heat exchanger 202, and the chilled water outlet 40 in the water-cooled chiller are connected in sequence.

[0090] In an example, in the natural cooling mode, it can be specifically set as follows: the compressor 101 is turned off, the proportional three-way valve 201 is fully opened toward the third heat exchanger 202, the first electric valve 203 and the second electric valve 204 are closed, and the third electric valve 205 is opened.

[0091] In the natural cooling mode provided in the embodiment of the present application, the cooling water system process is "cooling water inlet 10-proportional three-way valve 201-third heat exchanger 202-cooling water outlet 20"; the chilled water system process is "chilled water return port 30-third heat exchanger 202-third electric valve 205-chilled water outlet 40", and adjusting the cooling water circulation flow rate can meet the system refrigeration requirements.

[0092] The natural cooling mode provided in the embodiment of the present application can directly reduce the chilled water temperature to the preset chilled water temperature by using the third heat exchanger. The compressor system is not turned on in the mode, which can effectively improve the energy efficiency of the whole machine. The system flow of chilled water in the unit is relatively short, which can effectively reduce the pressure drop in the chilled water pipeline, can better adapt to various projects and effectively reduce the energy consumption of the chilled water pump.

[0093] S130. If the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, control the compressor to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, control the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence, control the cooling water inlet, the third heat exchanger and the cooling water outlet to be connected in sequence, and control the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet to be connected in sequence.

[0094] Among them, the preset second temperature is generally less than 28 degrees Celsius, and the preset second temperature is greater than the preset first temperature. The preset second temperature is also set by technical personnel in this field according to refrigeration needs.

[0095] Step 130 corresponds to the mixed cooling mode in the operating mode of the water-cooled chiller air-conditioning unit provided in the present application.

[0096] Specifically, please refer to Figure 6 , Figure 6 A system operation diagram of a hybrid refrigeration mode provided in an embodiment of the present application. In the hybrid refrigeration mode, the proportional three-way valve 201 is controlled to be proportionally opened in the direction of the first heat exchanger 102 according to a preset first ratio, so that the cooling water inlet 10, the first heat exchanger 102, and the cooling water outlet 20 are connected in sequence. The proportional three-way valve 201 is controlled to be proportionally opened in the direction of the third heat exchanger 202 according to a preset second ratio, so that the cooling water inlet 10, the third heat exchanger 202, and the cooling water outlet 20 are connected in sequence; the second electric valve 204 is controlled to be opened, the first electric valve 203 is closed, and the third electric valve 205 is controlled to be closed, so that the chilled water return port 30, the third heat exchanger 202, the second heat exchanger 104, and the chilled water outlet 40 are connected in sequence.

[0097] The preset second ratio is greater than the preset first ratio, and the preset first ratio and the preset second ratio are specifically set by those skilled in the art according to refrigeration needs.

[0098] In the hybrid refrigeration mode provided in the embodiment of the present application, there are two cooling water system processes, one is "cooling water inlet 10-proportional three-way valve 201-first heat exchanger 102-cooling water outlet 20", and the other is "cooling water inlet 10-proportional three-way valve 201-third heat exchanger 202-cooling water outlet 20". By adjusting the opening of the proportional three-way valve 201, the cooling water flow in the two flow paths is adjusted. The flow of cooling water to the third heat exchanger 202 flow path should be as large as possible to ensure the natural cooling refrigeration capacity of the third heat exchanger; the pressure The compressor system process is "compressor 101-first heat exchanger 102-throttling component 103-second heat exchanger 104-compressor 101". The main function of the compressor refrigeration system is to supplement the refrigeration capacity required by the natural cooling refrigeration system; the chilled water system process is "chilled water return port 30-third heat exchanger 202-second electric valve 204-second heat exchanger 104-chilled water outlet 40". The chilled water process connects the third heat exchanger 202 for natural cooling and the second heat exchanger 104 for compressor refrigeration in series.

[0099] In the hybrid refrigeration mode provided in the embodiment of the present application, the chilled water process is connected in series with the natural cooling and compressor refrigeration systems. The chilled water is first cooled by natural cooling at full flow, maximizing the use of the natural cold source, which can effectively reduce the supplementary cooling required by the compressor system; after the chilled water is naturally cooled, it enters the compressor system for cooling. The outlet temperature of the chilled water after passing through the second heat exchanger 104 is the preset chilled water outlet temperature. Figure 2 The outlet water temperature of the second heat exchanger 104 of the unit provided in the invention is high, thereby effectively improving the energy efficiency of the compressor system, thereby improving the energy efficiency of the whole machine. The entire process of the chilled water pipeline is connected in series, without the problem of water mixing in the parallel flow path, and the control target of the compressor system is single, which effectively improves the stability of the chilled water outlet.

[0100] S140. If the cooling water inlet temperature is greater than the preset second temperature, the compressor is controlled to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence.

[0101] Step S140 corresponds to the compressor cooling mode in the operating mode of the water-cooled chiller air-conditioning unit provided in the present application.

[0102] Specifically, please attend Figure 7 , Figure 7This is a system operation diagram of the compressor cooling mode provided in the embodiment of the present application. In the compressor cooling mode, the proportional three-way valve 201 is controlled to open proportionally toward the first heat exchanger 102, so that the cooling water inlet 10, the first heat exchanger 102 and the cooling water outlet 20 are connected in sequence. The first electric valve 203 is controlled to open, the second electric valve 204 is closed, and the third electric valve 205 is closed, so that the chilled water return port 30, the second heat exchanger 104 and the chilled water outlet 40 are connected in sequence.

[0103] In one example, in the compressor cooling mode, it can be specifically set as follows: the compressor 101 is turned on and running, the proportional three-way valve 201 is fully opened toward the first heat exchanger 102, the second electric valve 204 and the third electric valve 205 are closed, and the first electric valve 203 is opened.

[0104] In the embodiment of the present application, in the compressor refrigeration mode, the cooling water system process is "cooling water inlet 10-proportional three-way valve 201-first heat exchanger 102-cooling water outlet 20"; the compressor system process is "compressor 101-first heat exchanger 102-throttling component 103-second heat exchanger 104-compressor 101". In this compressor refrigeration mode, all cooling capacity is provided by the compressor refrigeration system, and the chilled water system process is "chilled water return port 30-first electric valve 203-second heat exchanger 104-chilled water outlet 40".

[0105] In the compressor refrigeration mode provided in the embodiment of the present application, the system flow of chilled water in the unit is relatively short, which can effectively reduce the pressure drop in the chilled water pipeline, can better adapt to various projects and effectively reduce the energy consumption of the chilled water pump.

[0106] In specific implementation, the present application is not limited by the execution order of the various steps described. If no conflict occurs, some steps can be performed in other orders or simultaneously.

[0107] From the above, it can be seen that the control method of the water-cooled chilled water air-conditioning unit provided in the embodiment of the present application, when the chilled water-cooled air-conditioning unit is turned on, if a refrigeration instruction is detected, different connection modes are switched between the components in the water-cooled chilled water air-conditioning unit according to the relationship between the cooling water inlet temperature and the preset first temperature and the preset second temperature, wherein, when the cooling water inlet temperature is less than or equal to the preset first temperature, the water-cooled chilled water air-conditioning unit switches to the natural cooling mode; when the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, the water-cooled chilled water air-conditioning unit switches to the mixed refrigeration mode; when the cooling water inlet temperature is greater than the preset second temperature, the water-cooled chilled water air-conditioning unit switches to the compressor refrigeration mode, so that the present application can configure corresponding different refrigeration operation modes under different cooling water inlet temperature ranges, thereby improving the refrigeration energy efficiency of the water-cooled chiller system.

[0108] The method described in the above embodiments is further described in detail below with examples.

[0109] See also Figure 8 , Figure 8 A second flow chart of the control method of the water-cooled chilled water air conditioning unit provided in the embodiment of the present application. The control method of the water-cooled chilled water air conditioning unit provided in the embodiment of the present application is applied to the water-cooled chilled water air conditioning unit, and the specific flow of the method can be as follows:

[0110] S210. When the water-cooled chiller air-conditioning unit is turned on, obtaining the chilled water outlet temperature of the water-cooled chiller air-conditioning unit through a second temperature sensor.

[0111] Please refer to Figure 3 The second temperature sensor 207 is arranged at the chilled water outlet to detect the chilled water outlet temperature of the water-cooled chilled water air conditioning unit. The water-cooled chilled water air conditioning unit detects the chilled water outlet temperature through the second temperature sensor 207. The second temperature sensor can be arranged in a pipeline or attached to a pipeline, and any arrangement method that can collect the cooling water temperature is acceptable.

[0112] S220: If the chilled water outlet temperature is greater than the preset chilled water outlet temperature, a cooling instruction for the water-cooled chiller is triggered.

[0113] In the embodiment of the present application, when the chilled water outlet temperature is greater than the preset chilled water outlet temperature, it indicates that refrigeration is currently required. At this time, a refrigeration instruction for the water-cooled chiller air-conditioning unit is triggered.

[0114] S230. In response to a cooling instruction, obtain a cooling water inlet temperature in a water-cooled chiller.

[0115] In the embodiment of the present application, when a cooling instruction is detected, the cooling water inlet temperature in the water-cooled chiller air-conditioning unit is obtained.

[0116] When obtaining the cooling water inlet temperature, a temperature sensor may be provided at the cooling water inlet to detect the cooling water inlet temperature. For example, please refer to Figure 3 The first temperature sensor 206 is arranged at the cooling water inlet for detecting the cooling water inlet temperature in the water-cooled chiller. The water-cooled chiller detects the cooling water inlet temperature through the first temperature sensor 206. The first temperature sensor can be arranged in the pipeline or attached to the pipeline, and any arrangement method that can collect the cooling water temperature is acceptable.

[0117] S240. If the cooling water inlet temperature is less than or equal to the preset first temperature, the compressor is controlled to be turned off, the cooling water inlet, the third heat exchanger, and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, and the chilled water outlet are controlled to be connected in sequence.

[0118] Specifically, S240 is consistent with S120 and will not be described in detail here.

[0119] S250. If the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, control the compressor to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, control the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence, control the cooling water inlet, the third heat exchanger and the cooling water outlet to be connected in sequence, and control the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet to be connected in sequence, wherein the preset second temperature is greater than the preset first temperature.

[0120] Specifically, S250 is consistent with S130 and will not be described in detail here.

[0121] S260. If the cooling water inlet temperature is greater than the preset second temperature, control the compressor to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, control the cooling water inlet, the first heat exchanger and the cooling water outlet to be connected in sequence, and control the chilled water return port, the second heat exchanger and the chilled water outlet to be connected in sequence.

[0122] Specifically, S260 is consistent with S140 and will not be described in detail here.

[0123] As can be seen from the above, the control method of the water-cooled chilled water air-conditioning unit proposed in the embodiment of the present application, when the water-cooled chilled water air-conditioning unit is turned on, detects the chilled water outlet temperature, and when the chilled water outlet temperature is greater than the preset chilled water outlet temperature, triggers the refrigeration instruction for the water-cooled chilled water air-conditioning unit, and in response to the refrigeration instruction, obtains the cooling water inlet temperature, and when the cooling water inlet temperature is less than or equal to the preset first temperature, the water-cooled chilled water air-conditioning unit switches to the natural cooling mode; when the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, the water-cooled chilled water air-conditioning unit switches to the mixed cooling mode; when the cooling water inlet temperature is greater than the preset second temperature, the water-cooled chilled water air-conditioning unit switches to the compressor cooling mode. In this way, when the chilled water outlet temperature is greater than the preset chilled water outlet temperature, the present application automatically configures different refrigeration operation modes according to different cooling water inlet temperature ranges, which can improve the refrigeration energy efficiency of the system of the water-cooled chilled water unit.

[0124] In one embodiment, a control device for a water-cooled chiller is also provided. Fig. 9 , Fig. 9 The structural diagram of the control device 300 of the water-cooled chilled water air conditioning unit provided in the embodiment of the present application. The control device 300 of the water-cooled chilled water air conditioning unit is applied to the water-cooled chilled water air conditioning unit, and the water-cooled chilled water air conditioning unit includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a throttling component, a cooling water outlet, a cooling water inlet, a chilled water return port, and a chilled water outlet. The control device 300 of the water-cooled chilled water air conditioning unit includes an acquisition module 301, a first control module 302, a second control module 303, and a third control module 304, as follows:

[0125] The acquisition module 301 is used to acquire the cooling water inlet temperature of the water-cooled chiller air conditioner unit when a cooling instruction for the water-cooled chiller air conditioner unit is detected when the water-cooled chiller air conditioner unit is turned on;

[0126] The first control module 302 is used to control the compressor to be turned off, control the cooling water inlet, the third heat exchanger, and the cooling water outlet to be connected in sequence, and control the chilled water return port, the third heat exchanger, and the chilled water outlet to be connected in sequence if the cooling water inlet temperature is less than or equal to the preset first temperature;

[0127] The second control module 303 is used for controlling the compressor to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, controlling the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence, controlling the cooling water inlet, the third heat exchanger and the cooling water outlet to be connected in sequence, and controlling the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet to be connected in sequence, if the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, wherein the preset second temperature is greater than the preset first temperature;

[0128] The third control module 304 is used to control the compressor to start if the cooling water inlet temperature is greater than the preset second temperature, so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, control the cooling water inlet, the first heat exchanger and the cooling water outlet to be connected in sequence, and control the chilled water return port, the second heat exchanger and the chilled water outlet to be connected in sequence.

[0129] In some embodiments, the water-cooled chiller air conditioning unit further includes: a proportional three-way valve, a first electric valve, a second electric valve and a third electric valve, wherein:

[0130] The proportional three-way valve is connected to the cooling water inlet, the first heat exchanger and the third heat exchanger, and is used to control the cooling water flow toward the first heat exchanger and the third heat exchanger;

[0131] The first electric valve is connected to the chilled water return port, the second electric valve, and the second heat exchanger, and is used to control the chilled water flow to the second heat exchanger;

[0132] The second electric valve is connected to the second heat exchanger, the third heat exchanger, the first electric valve, and the third electric valve, and is used to control the flow of chilled water toward the second heat exchanger;

[0133] The third electric valve is connected to the third heat exchanger, the chilled water outlet, and the second electric valve, and is used to control the chilled water flow toward the chilled water outlet;

[0134] In some embodiments, the first control module 302 may be used to:

[0135] The proportional three-way valve is controlled to open proportionally toward the third heat exchanger so that the cooling water inlet, the third heat exchanger, and the cooling water outlet are connected in sequence.

[0136] In some embodiments, the first control module 302 may be used to:

[0137] The first electric valve is closed, the second electric valve is closed, and the third electric valve is opened, so that the chilled water return port, the third heat exchanger, and the chilled water outlet in the water-cooled chiller are connected in sequence.

[0138] In some embodiments, the second control module 303 may be used to:

[0139] The proportional three-way valve is controlled to open proportionally toward the first heat exchanger according to a preset first ratio, so that the cooling water inlet, the first heat exchanger, and the cooling water outlet are connected in sequence.

[0140] In some embodiments, the second control module 303 may be used to:

[0141] The proportional three-way valve is controlled to open proportionally toward the third heat exchanger according to a preset second ratio, so that the cooling water inlet, the third heat exchanger and the cooling water outlet are connected in sequence, and the preset second ratio is greater than the preset first ratio.

[0142] In some embodiments, the second control module 303 may be used to:

[0143] The second electric valve is controlled to be opened, the first electric valve is controlled to be closed, and the third electric valve is controlled to be closed, so that the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet are connected in sequence.

[0144] In some embodiments, the third control module 304 may be used to:

[0145] The proportional three-way valve is controlled to open proportionally toward the first heat exchanger so that the cooling water inlet, the first heat exchanger and the cooling water outlet are connected in sequence.

[0146] In some embodiments, the third control module 304 may be used to:

[0147] The first electric valve is controlled to be opened, the second electric valve is controlled to be closed, and the third electric valve is controlled to be closed, so that the chilled water return port, the second heat exchanger and the chilled water outlet are connected in sequence.

[0148] In some embodiments, the water-cooled chilled water air conditioning unit further includes a first temperature sensor, which is disposed at a cooling water inlet and is used to detect a cooling water inlet temperature in the water-cooled chilled water air conditioning unit.

[0149] In some embodiments, the control device 300 of the water-cooled chiller may further include a temperature detection module, which may be used to:

[0150] The cooling water inlet temperature in the water-cooled chiller air-conditioning unit is obtained through the first temperature sensor.

[0151] In some embodiments, the water-cooled chilled water air conditioning unit further includes a second temperature sensor, which is disposed at the chilled water outlet and is used to detect the chilled water outlet temperature in the water-cooled chilled water air conditioning unit.

[0152] In some embodiments, the temperature detection module can also be used for:

[0153] The outlet temperature of the chilled water in the water-cooled chiller is obtained by the second temperature sensor.

[0154] In some embodiments, the acquisition module 301 may be used to:

[0155] If the chilled water outlet temperature is greater than the preset chilled water outlet temperature, a cooling command for the water-cooled chiller is triggered.

[0156] In some embodiments, the acquisition module 301 may be used to:

[0157] A user-triggered cooling command for a water-cooled chiller is detected.

[0158] It should be noted that the control device of the water-cooled chilled water air-conditioning unit provided in the embodiment of the present application and the control method of the water-cooled chilled water air-conditioning unit in the above embodiment belong to the same concept. Any method provided in the control method embodiment of the water-cooled chilled water air-conditioning unit can be implemented through the control device of the water-cooled chilled water air-conditioning unit. The specific implementation process is detailed in the control method embodiment of the water-cooled chilled water air-conditioning unit, which will not be repeated here.

[0159] In addition, in order to better implement the control method of the water-cooled chilled water air conditioning unit in the embodiment of the present application, based on the control method of the water-cooled chilled water air conditioning unit, the present application also provides a water-cooled chilled water air conditioning unit. Fig.10 , Fig.10The first structural diagram of the water-cooled chilled water air conditioning unit provided in the embodiment of the present application. The water-cooled chilled water air conditioning unit 400 includes a processor 401 and a memory 402. The processor 401 is electrically connected to the memory 402.

[0160] The processor 401 is the control center of the water-cooled chilled water air conditioning unit 400. It uses various interfaces and lines to connect various parts of the entire water-cooled chilled water air conditioning unit. By running or calling the computer program stored in the memory 402, and calling the data stored in the memory 402, it executes various functions of the water-cooled chilled water air conditioning unit and processes data, thereby monitoring the water-cooled chilled water air conditioning unit as a whole. Among them, the processor 401 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0161] The memory 402 can be used to store computer programs and data. The computer program stored in the memory 402 contains instructions that can be executed in the processor. The computer program can form various functional modules. The processor 401 executes various functional applications and data processing by calling the computer program stored in the memory 402. Among them, the memory 402 can mainly include a storage program area and a storage data area. The storage program area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the storage data area can store data created according to the use of the water-cooled chiller 400 (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0162] In this embodiment, the processor 401 in the water-cooled chiller 400 will load instructions corresponding to the processes of one or more computer programs into the memory 402 according to the following steps, and the processor 401 will run the computer program stored in the memory 402 to achieve various functions:

[0163] When the water-cooled chiller air conditioner unit is turned on, if a cooling instruction for the water-cooled chiller air conditioner unit is detected, the cooling water inlet temperature of the water-cooled chiller air conditioner unit is obtained;

[0164] If the cooling water inlet temperature is less than or equal to the preset first temperature, the compressor is controlled to be turned off, the cooling water inlet, the third heat exchanger, and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, and the chilled water outlet are controlled to be connected in sequence;

[0165] If the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, the compressor is controlled to be turned on so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger, and the cooling water outlet are controlled to be connected in sequence, the cooling water inlet, the third heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence, wherein the preset second temperature is greater than the preset first temperature;

[0166] If the cooling water inlet temperature is greater than the preset second temperature, the compressor is controlled to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence.

[0167] In some embodiments, see Fig.11 , Fig.11 A second structural diagram of a water-cooled chilled water air conditioning unit provided in an embodiment of the present application. The water-cooled chilled water air conditioning unit 400 further includes: a radio frequency circuit 403, a display screen 404, a control circuit 405, an input unit 406, an audio circuit 407, a sensor 408, and a power supply 409. The processor 401 is electrically connected to the radio frequency circuit 403, the display screen 404, the control circuit 405, the input unit 406, the audio circuit 407, the sensor 408, and the power supply 409, respectively.

[0168] The radio frequency circuit 403 is used to send and receive radio frequency signals to communicate with network devices or other electronic devices through wireless communication.

[0169] Display screen 404 may be used to display information input by a user or provided to a user and various graphical user interfaces of the water-cooled chiller, which may be composed of images, texts, icons, videos and any combination thereof.

[0170] The control circuit 405 is electrically connected to the display screen 404 and is used to control the display screen 404 to display information.

[0171] The input unit 406 can be used to receive input numbers, character information or user feature information (such as fingerprints), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control. The input unit 406 can include a fingerprint recognition module.

[0172] The audio circuit 407 can provide an audio interface between the user and the water-cooled chiller unit through a speaker and a microphone. The audio circuit 407 includes a microphone. The microphone is electrically connected to the processor 401. The microphone is used to receive voice information input by the user.

[0173] The sensor 408 is used to collect external environment information. The sensor 408 may include one or more sensors such as an environment brightness sensor, an acceleration sensor, and a gyroscope.

[0174] The power supply 409 is used to supply power to various components of the water-cooled chiller 400. In some embodiments, the power supply 409 can be logically connected to the processor 401 through a power management system, so that the power management system can manage charging, discharging, and power consumption.

[0175] Although not shown in the figure, the water-cooled chiller unit 400 may also include a camera, a Bluetooth module, etc., which will not be described in detail here.

[0176] In this embodiment, the processor 401 in the water-cooled chiller 400 will load instructions corresponding to the processes of one or more computer programs into the memory 402 according to the following steps, and the processor 401 will run the computer program stored in the memory 402 to achieve various functions:

[0177] When the water-cooled chiller air conditioner unit is turned on, if a cooling instruction for the water-cooled chiller air conditioner unit is detected, the cooling water inlet temperature of the water-cooled chiller air conditioner unit is obtained;

[0178] If the cooling water inlet temperature is less than or equal to the preset first temperature, the compressor is controlled to be turned off, the cooling water inlet, the third heat exchanger, and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, and the chilled water outlet are controlled to be connected in sequence;

[0179] If the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, the compressor is controlled to be turned on so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger, and the cooling water outlet are controlled to be connected in sequence, the cooling water inlet, the third heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence, wherein the preset second temperature is greater than the preset first temperature;

[0180] If the cooling water inlet temperature is greater than the preset second temperature, the compressor is controlled to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence.

[0181] In some embodiments, the water-cooled chiller air conditioning unit further includes: a proportional three-way valve, a first electric valve, a second electric valve and a third electric valve, wherein:

[0182] The proportional three-way valve is connected to the cooling water inlet, the first heat exchanger and the third heat exchanger, and is used to control the cooling water flow toward the first heat exchanger and the third heat exchanger;

[0183] The first electric valve is connected to the chilled water return port, the second electric valve, and the second heat exchanger, and is used to control the chilled water flow to the second heat exchanger;

[0184] The second electric valve is connected to the second heat exchanger, the third heat exchanger, the first electric valve, and the third electric valve, and is used to control the flow of chilled water toward the second heat exchanger;

[0185] The third electric valve is connected to the third heat exchanger, the chilled water outlet, and the second electric valve, and is used to control the chilled water flow toward the chilled water outlet.

[0186] In some embodiments, when the processor 401 executes control to connect the cooling water inlet, the third heat exchanger, and the cooling water outlet in the water-cooled chiller in sequence, the following steps may be executed:

[0187] The proportional three-way valve is controlled to open proportionally toward the third heat exchanger so that the cooling water inlet, the third heat exchanger, and the cooling water outlet are connected in sequence.

[0188] In some embodiments, when the processor 401 executes control to sequentially connect the chilled water return port, the third heat exchanger, and the chilled water outlet in the water-cooled chiller, the following steps may be performed:

[0189] The first electric valve is closed, the second electric valve is closed, and the third electric valve is opened, so that the chilled water return port, the third heat exchanger, and the chilled water outlet in the water-cooled chiller are connected in sequence.

[0190] In some embodiments, when the processor 401 controls the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence, the following steps may be performed:

[0191] The proportional three-way valve is controlled to open proportionally toward the first heat exchanger according to a preset first ratio, so that the cooling water inlet, the first heat exchanger, and the cooling water outlet are connected in sequence.

[0192] In some embodiments, when the processor 401 executes controlling the cooling water inlet, the third heat exchanger, and the cooling water outlet to be connected in sequence, the following steps may be executed:

[0193] The proportional three-way valve is controlled to open proportionally toward the third heat exchanger according to a preset second ratio, so that the cooling water inlet, the third heat exchanger and the cooling water outlet are connected in sequence, and the preset second ratio is greater than the preset first ratio.

[0194] In some embodiments, when the processor 401 executes control to sequentially connect the chilled water return port, the third heat exchanger, the second heat exchanger, and the chilled water outlet, the processor 401 may execute:

[0195] The second electric valve is controlled to be opened, the first electric valve is controlled to be closed, and the third electric valve is controlled to be closed, so that the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet are connected in sequence.

[0196] In some embodiments, when the processor 401 executes control to connect the cooling water inlet, the first heat exchanger and the cooling water outlet in sequence, it can execute: controlling the proportional three-way valve to open proportionally in the direction of the first heat exchanger so that the cooling water inlet, the first heat exchanger and the cooling water outlet are connected in sequence.

[0197] In some embodiments, when the processor 401 executes the control to connect the chilled water return port, the second heat exchanger, and the chilled water outlet in sequence, the processor 401 may execute:

[0198] The first electric valve is controlled to be opened, the second electric valve is controlled to be closed, and the third electric valve is controlled to be closed, so that the chilled water return port, the second heat exchanger and the chilled water outlet are connected in sequence.

[0199] In some embodiments, the water-cooled chilled water air conditioning unit further includes a first temperature sensor, which is disposed at a cooling water inlet and is used to detect a cooling water inlet temperature in the water-cooled chilled water air conditioning unit.

[0200] In some embodiments, when the processor 401 executes the acquisition of the cooling water inlet temperature in the water-cooled chiller air-conditioning unit, the processor 401 may execute:

[0201] The cooling water inlet temperature in the water-cooled chiller air-conditioning unit is obtained through the first temperature sensor.

[0202] In some embodiments, the water-cooled chilled water air conditioning unit further includes a second temperature sensor, which is disposed at the chilled water outlet and is used to detect the chilled water outlet temperature in the water-cooled chilled water air conditioning unit.

[0203] In some embodiments, when the processor 401 detects a cooling instruction for a water-cooled chiller, the processor 401 may execute:

[0204] The outlet temperature of chilled water in the water-cooled chiller air conditioner is obtained by a second temperature sensor;

[0205] If the chilled water outlet temperature is greater than the preset chilled water outlet temperature, a cooling command for the water-cooled chiller is triggered.

[0206] In some embodiments, when the processor 401 detects a cooling instruction for a water-cooled chiller, the processor 401 may execute:

[0207] A user-triggered cooling command for a water-cooled chiller is detected.

[0208] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. When the computer program is run on a computer, the computer executes the control method of the water-cooled chiller air-conditioning unit described in any of the above embodiments.

[0209] It should be noted that, a person skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the storage medium can include but is not limited to: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0210] In addition, the terms "first", "second", and "third" in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or modules, but some embodiments also include steps or modules that are not listed, or some embodiments also include other steps or modules inherent to these processes, methods, products, or devices.

[0211] The control method of the water-cooled chilled water air-conditioning unit and the water-cooled chilled water air-conditioning unit provided by the embodiment of the present application are introduced in detail above. Specific examples are used herein to illustrate the principle and implementation method of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A control method for a water-cooled chiller air conditioner unit, applied to a water-cooled chiller air conditioner unit, It is characterized in that The water-cooled chiller air conditioning unit comprises a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a throttling component, a cooling water outlet, a cooling water inlet, a chilled water return port, and a chilled water outlet; The method comprises: When the water-cooled chilled water air conditioning unit is turned on, if a cooling instruction for the water-cooled chilled water air conditioning unit is detected, then the cooling water inlet temperature in the water-cooled chilled water air conditioning unit is obtained; If the cooling water inlet temperature is less than or equal to the preset first temperature, the compressor is controlled to be turned off, the cooling water inlet, the third heat exchanger, and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, and the chilled water outlet are controlled to be connected in sequence; If the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, the compressor is controlled to be turned on so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger, and the cooling water outlet are controlled to be connected in sequence, the cooling water inlet, the third heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence, wherein the preset second temperature is greater than the preset first temperature; If the cooling water inlet temperature is greater than the preset second temperature, the compressor is controlled to turn on so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, the cooling water inlet, the first heat exchanger and the cooling water outlet are controlled to be connected in sequence, and the chilled water return port, the second heat exchanger and the chilled water outlet are controlled to be connected in sequence.

2. The control method of the water-cooled chiller air conditioning unit according to claim 1, It is characterized in that The water-cooled cold water air conditioning unit further comprises: a proportional three-way valve, a first electric valve, a second electric valve and a third electric valve, wherein: The proportional three-way valve is connected to the cooling water inlet, the first heat exchanger and the third heat exchanger, and is used to control the cooling water flow toward the first heat exchanger and the third heat exchanger; The first electric valve is connected to the chilled water return port, the second electric valve, and the second heat exchanger, and is used to control the chilled water flow to the second heat exchanger; The second electric valve is connected to the second heat exchanger, the third heat exchanger, the first electric valve, and the third electric valve, and is used to control the flow of chilled water toward the second heat exchanger; The third electric valve is connected to the third heat exchanger, the chilled water outlet, and the second electric valve, and is used to control the chilled water flow toward the chilled water outlet; The controlling the cooling water inlet, the third heat exchanger, and the cooling water outlet in the water-cooled chiller air conditioner to be connected in sequence comprises: Controlling the proportional three-way valve to open proportionally toward the third heat exchanger so that the cooling water inlet, the third heat exchanger, and the cooling water outlet are connected in sequence; The method of controlling the chilled water return port, the third heat exchanger, and the chilled water outlet in the water-cooled chiller air-conditioning unit to be connected in sequence comprises: The first electric valve is closed, the second electric valve is closed, and the third electric valve is opened, so that the chilled water return port, the third heat exchanger, and the chilled water outlet in the water-cooled chiller are connected in sequence.

3. The control method of the water-cooled chiller air conditioning unit according to claim 1, It is characterized in that The water-cooled cold water air conditioning unit further comprises: a proportional three-way valve, a first electric valve, a second electric valve and a third electric valve, wherein: The proportional three-way valve is connected to the cooling water inlet, the first heat exchanger and the third heat exchanger, and is used to control the cooling water flow toward the first heat exchanger and the third heat exchanger; The first electric valve is connected to the chilled water return port, the second electric valve, and the second heat exchanger, and is used to control the chilled water flow to the second heat exchanger; The second electric valve is connected to the second heat exchanger, the third heat exchanger, the first electric valve, and the third electric valve, and is used to control the flow of chilled water toward the second heat exchanger; The third electric valve is connected to the third heat exchanger, the chilled water outlet, and the second electric valve, and is used to control the chilled water flow toward the chilled water outlet; The controlling the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence comprises: Controlling the proportional three-way valve to open proportionally toward the first heat exchanger according to a preset first ratio, so that the cooling water inlet, the first heat exchanger, and the cooling water outlet are connected in sequence; The controlling the cooling water inlet, the third heat exchanger, and the cooling water outlet to be connected in sequence comprises: Controlling the proportional three-way valve to open proportionally toward the third heat exchanger according to a preset second ratio, so that the cooling water inlet, the third heat exchanger and the cooling water outlet are connected in sequence, and the preset second ratio is greater than the preset first ratio; The controlling the chilled water return port, the third heat exchanger, the second heat exchanger, and the chilled water outlet to be connected in sequence comprises: The second electric valve is controlled to be opened, the first electric valve is controlled to be closed, and the third electric valve is controlled to be closed, so that the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet are connected in sequence.

4. The control method of the water-cooled chiller air conditioning unit according to claim 1, It is characterized in that The water-cooled cold water air conditioning unit further comprises: a proportional three-way valve, a first electric valve, a second electric valve and a third electric valve, wherein: The proportional three-way valve is connected to the cooling water inlet, the first heat exchanger and the third heat exchanger, and is used to control the cooling water flow toward the first heat exchanger and the third heat exchanger; The first electric valve is connected to the chilled water return port, the second electric valve, and the second heat exchanger, and is used to control the chilled water flow to the second heat exchanger; The second electric valve is connected to the second heat exchanger, the third heat exchanger, the first electric valve, and the third electric valve, and is used to control the flow of chilled water toward the second heat exchanger; The third electric valve is connected to the third heat exchanger, the chilled water outlet, and the second electric valve, and is used to control the chilled water flow toward the chilled water outlet; The controlling the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence comprises: Controlling the proportional three-way valve to open proportionally toward the first heat exchanger so that the cooling water inlet, the first heat exchanger and the cooling water outlet are connected in sequence; The controlling the chilled water return port, the second heat exchanger and the chilled water outlet to be connected in sequence comprises: The first electric valve is controlled to be opened, the second electric valve is controlled to be closed, and the third electric valve is controlled to be closed, so that the chilled water return port, the second heat exchanger and the chilled water outlet are connected in sequence.

5. The control method of the water-cooled chiller air conditioning unit according to claim 1, It is characterized in that The water-cooled chilled water air conditioning unit further includes a first temperature sensor, which is disposed at the cooling water inlet and is used to detect the cooling water inlet temperature of the water-cooled chilled water air conditioning unit. The step of obtaining the cooling water inlet temperature of the water-cooled chilled water air conditioning unit includes: The cooling water inlet temperature in the water-cooled chiller air-conditioning unit is obtained through the first temperature sensor.

6. The control method of the water-cooled chiller air conditioning unit according to claim 1, It is characterized in that The water-cooled chilled water air conditioning unit further includes a second temperature sensor, which is disposed at the chilled water outlet and is used to detect the chilled water outlet temperature of the water-cooled chilled water air conditioning unit. The detection of the refrigeration instruction for the water-cooled chilled water air conditioning unit includes: obtaining the outlet temperature of the chilled water in the water-cooled chiller air-conditioning unit by means of the second temperature sensor; If the chilled water outlet temperature is greater than the preset chilled water outlet temperature, the refrigeration instruction for the water-cooled chiller is triggered.

7. The control method of the water-cooled chiller air conditioning unit according to claim 1, It is characterized in that The detecting of a refrigeration instruction for the water-cooled chiller air-conditioning unit comprises: The cooling instruction for the water-cooled chiller is detected.

8. A control device for a water-cooled chiller unit, It is characterized in that Applicable to a water-cooled chilled water air conditioning unit, characterized in that the water-cooled chilled water air conditioning unit comprises a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a throttling component, a cooling water outlet, a cooling water inlet, a chilled water return port, and a chilled water outlet; The control device of the water-cooled chiller air-conditioning unit comprises: an acquisition module, configured to acquire a cooling water inlet temperature of the water-cooled chilled water air-conditioning unit when a cooling instruction for the water-cooled chilled water air-conditioning unit is detected when the water-cooled chilled water air-conditioning unit is turned on; A first control module is used for controlling the compressor to be turned off, controlling the cooling water inlet, the third heat exchanger, and the cooling water outlet to be connected in sequence, and controlling the chilled water return port, the third heat exchanger, and the chilled water outlet to be connected in sequence if the cooling water inlet temperature is less than or equal to a preset first temperature; A second control module is used for controlling the compressor to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, controlling the cooling water inlet, the first heat exchanger, and the cooling water outlet to be connected in sequence, controlling the cooling water inlet, the third heat exchanger and the cooling water outlet to be connected in sequence, and controlling the chilled water return port, the third heat exchanger, the second heat exchanger and the chilled water outlet to be connected in sequence, if the cooling water inlet temperature is greater than the preset first temperature and less than or equal to the preset second temperature, wherein the preset second temperature is greater than the preset first temperature; The third control module is used to control the compressor to start so that the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the compressor are connected in sequence, control the cooling water inlet, the first heat exchanger and the cooling water outlet to be connected in sequence, and control the chilled water return port, the second heat exchanger and the chilled water outlet to be connected in sequence if the cooling water inlet temperature is greater than the preset second temperature.

9. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the computer program is executed on a computer, the computer executes the control method of the water-cooled chiller air-conditioning unit according to any one of claims 1 to 7.

10. A water-cooled chiller air conditioning unit, comprising a processor and a memory, wherein the memory stores a computer program, It is characterized in that The processor is used to execute the control method of the water-cooled chiller air-conditioning unit according to any one of claims 1 to 7 by calling the computer program.

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