Air conditioner and control method and device thereof

Abstract

The invention provides an air conditioner and a control method and device thereof. The refrigerant loop comprises a compressor, a condenser, an expansion valve and an evaporator; the chilled water loop comprises a chilled water pipeline, a first water tank and a first bypass valve, the chilled water pipeline flows through the evaporator, and the first water tank and the first bypass valve are connected in parallel; the cooling water loop comprises a cooling water pipeline, a second water tank and a second bypass valve, the cooling water pipeline flows through the condenser, and the second water tank and the second bypass valve are connected in parallel; the control device is used for acquiring current working parameters of the compressor; calculating chilled water calculated water flow or cooling water calculated water flow according to the current working parameters; the opening degree of the first bypass valve is adjusted according to the chilled water calculated water flow, or the opening degree of the second bypass valve is adjusted according to the cooling water calculated water flow. The water flow is calculated through the unit load obtained through parameter calculation, the water flow in the unit is effectively adjusted in cooperation with water path bypass adjustment, and stable operation of the water flow of the unit is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliances, and particularly to an air conditioner and its control method and control device. Background Art

[0002] In related technologies, in traditional systems, the control of water flow rate usually relies on the following methods: First, traditional systems may use flow meters or water flow switches to monitor and protect the water flow rate, but these devices usually only provide basic flow rate monitoring and on-off control, and do not have the ability of dynamic adjustment; Second, some systems may include bypass pipelines with fixed settings, but the opening degrees of these pipelines are fixed and cannot be adjusted according to the actual operating state of the system.

[0003] However, the above traditional water flow rate control methods lack the ability to dynamically adjust the water flow rate according to real-time working parameters, so they cannot adapt to complex working conditions such as compressor load changes or temperature difference changes. That is, due to the lack of the ability to dynamically adjust the water flow rate according to real-time parameters, traditional systems may not be able to accurately control the water flow rate, resulting in non-optimal heat exchange efficiency. Further, due to the inability to accurately control the water flow rate, the system may not be able to maintain the best energy efficiency under different working conditions, resulting in energy waste. In addition, when the load changes or the environmental conditions change, traditional systems may not be able to maintain a stable water flow rate, affecting the stability and reliability of the system. Summary of the Invention

[0004] The present invention provides an air conditioner and its control method and control device to solve the defects existing in the prior art and achieve the following technical effects: Calculate the water flow rate based on the unit load and temperature difference obtained by calculating parameters such as the suction and discharge saturation temperatures and current of the compressor during operation, and cooperate with the bypass adjustment of the water circuit to effectively adjust the water flow rate in the unit, ensure the stable operation of the water flow rate in the unit, and aim to improve the operation stability of the chiller.

[0005] The air conditioner according to the first aspect embodiment of the present invention includes:

[0006] A refrigerant circuit, including a compressor, a condenser, an expansion valve, and an evaporator connected by refrigerant pipelines;

[0007] A chilled water circuit, including a chilled water pipeline, a first water tank, and a first bypass valve, the chilled water pipeline flows through the evaporator, and the first water tank and the first bypass valve are in parallel;

[0008] A cooling water circuit, including a cooling water pipeline, a second water tank, and a second bypass valve, the cooling water pipeline flows through the condenser, and the second water tank and the second bypass valve are in parallel;

[0009] A control device is configured to obtain the current operating parameters of a compressor; calculate the calculated chilled water flow rate flowing through the evaporator or the calculated cooling water flow rate flowing through the condenser based on the current operating parameters of the compressor; control and adjust the opening degree of the first bypass valve according to the calculated chilled water flow rate, or control and adjust the opening degree of the second bypass valve according to the calculated cooling water flow rate.

[0010] According to an embodiment of the present invention, a refrigerant bypass valve is further connected between the condenser and the evaporator. The control device is configured to obtain the system pressure of the air conditioner and adjust the opening degree of the refrigerant bypass valve according to the system pressure.

[0011] In this way, by reducing the system pressure, the refrigerant bypass valve helps to protect the compressor from damage caused by excessive pressure, because continuous high pressure may shorten the service life of the compressor or cause failures. And, by promptly responding to an abnormal increase in the system pressure and taking measures, the refrigerant bypass valve helps to reduce system failures caused by pressure problems, thereby improving the reliability of the entire air conditioning system.

[0012] A control method for an air conditioner according to an embodiment of the second aspect of the present invention based on an embodiment of the first aspect of the present invention includes:

[0013] Obtain the current operating parameters of the compressor;

[0014] Calculate the calculated chilled water flow rate flowing through the evaporator or the calculated cooling water flow rate flowing through the condenser based on the current operating parameters of the compressor;

[0015] Control and adjust the opening degree of the first bypass valve according to the calculated chilled water flow rate, or control and adjust the opening degree of the second bypass valve according to the calculated cooling water flow rate.

[0016] According to an embodiment of the present invention, the step of calculating the calculated chilled water flow rate flowing through the evaporator or the calculated cooling water flow rate flowing through the condenser based on the current operating parameters of the compressor specifically includes:

[0017] Calculate the current refrigerating capacity of the air conditioner based on the current operating parameters of the compressor;

[0018] Obtain the chilled water coefficient, and calculate the calculated chilled water flow rate based on the current refrigerating capacity and the chilled water coefficient; or, obtain the cooling water coefficient, and calculate the calculated cooling water flow rate based on the current refrigerating capacity and the cooling water coefficient.

[0019] According to an embodiment of the present invention, in the step of calculating the current cooling capacity of the air conditioner based on the current operating parameters of the compressor, the current operating parameters of the compressor include: the current exhaust saturation temperature of the compressor, the current suction saturation temperature, and the current current.

[0020] In this way, through this method, the control system of the present invention can achieve precise control of the water flow rate in the air conditioning system, optimize the heat exchange efficiency, and improve the energy efficiency and stability of the entire system. In addition, this method can also adapt to different working conditions and environmental changes, providing a more intelligent and automated control solution.

[0021] According to an embodiment of the present invention, the step of calculating the water flow rate based on the chilled water to control and adjust the opening degree of the first bypass valve specifically includes:

[0022] When the calculated water flow rate of the chilled water is less than the first set chilled water flow rate, control and adjust the opening degree of the first bypass valve to increase;

[0023] When the calculated water flow rate of the chilled water is greater than the second set chilled water flow rate, control and adjust the opening degree of the first bypass valve to decrease;

[0024] When the calculated water flow rate of the chilled water is greater than or equal to the first set chilled water flow rate and less than or equal to the second set chilled water flow rate, the opening degree of the first bypass valve remains unchanged.

[0025] In this way, this method realizes the closed-loop control of the chilled water flow rate by precisely adjusting the opening degree of the first bypass valve. As a result, the system can not only optimize energy efficiency but also protect the evaporator and the entire air conditioning system under different operating conditions, extending the service life of the equipment.

[0026] According to an embodiment of the present invention, the control method of the air conditioner further includes:

[0027] When the calculated water flow rate of the chilled water is less than the first set chilled water flow rate, obtain the temperature of the chilled water flowing through the evaporator;

[0028] If it is determined that the chilled water temperature is greater than the first set chilled water temperature, control the air conditioner to perform a load reduction operation; or, if it is determined that the chilled water temperature is less than the second set chilled water temperature, control the air conditioner to shut down;

[0029] Wherein, the first set chilled water temperature is greater than the second set chilled water temperature.

[0030] In this way, this method provides an intelligent protection mechanism that can protect the air-conditioning system under different working conditions and avoid various potential problems caused by too low water flow rate. Through this control strategy, while ensuring energy efficiency, the system also ensures the safe operation of the equipment and extends the service life of the air-conditioning system.

[0031] According to an embodiment of the present invention, the step of controlling and adjusting the opening degree of the second bypass valve according to the calculated water flow rate of the cooling water specifically includes:

[0032] When the calculated water flow rate of the cooling water is less than the first set cooling water flow rate, control and adjust the opening degree of the second bypass valve to increase;

[0033] When the calculated water flow rate of the cooling water is greater than the second set cooling water flow rate, control and adjust the opening degree of the second bypass valve to decrease;

[0034] When the calculated water flow rate of the cooling water is greater than or equal to the first set cooling water flow rate and less than or equal to the second set cooling water flow rate, the opening degree of the second bypass valve remains unchanged.

[0035] In this way, through this precise control method, the system can not only optimize energy efficiency, but also protect the condenser and the entire air-conditioning system under different operating conditions, and extend the service life of the equipment.

[0036] According to an embodiment of the present invention, the control method of the air conditioner further includes:

[0037] When the calculated water flow rate of the cooling water is less than the first set cooling water flow rate, obtain the temperature of the cooling water flowing through the condenser;

[0038] If it is determined that the cooling water temperature is greater than the first set cooling water temperature, control the air conditioner to perform a load reduction operation; or, if it is determined that the cooling water temperature is less than the second set cooling water temperature, control the air conditioner to stop;

[0039] Wherein, the first set cooling water temperature is greater than the second set cooling water temperature.

[0040] In this way, this method provides an intelligent protection mechanism that can protect the air-conditioning system under different working conditions and avoid various potential problems caused by too low cooling water flow rate. Through this control strategy, while ensuring energy efficiency, the system also ensures the safe operation of the equipment and extends the service life of the air-conditioning system.

[0041] According to an embodiment of the present invention, the control method of the air conditioner further includes:

[0042] Obtain the system pressure of the air conditioner;

[0043] Adjust the opening degree of the refrigerant bypass valve according to the system pressure.

[0044] According to an embodiment of the present invention, the step of adjusting the opening degree of the refrigerant bypass valve according to the system pressure specifically includes:

[0045] When the system pressure is greater than the set high-pressure protection value, control the refrigerant bypass valve to open or increase the opening degree;

[0046] When the system pressure is less than the set low-pressure protection value, control the refrigerant bypass valve to close or decrease the opening degree;

[0047] Wherein, the set high-pressure protection value is greater than the set low-pressure protection value.

[0048] In this way, through this control strategy, the system can dynamically respond to pressure changes, automatically adjust the opening degree of the refrigerant bypass valve, and maintain the stability of the system pressure. This automatic adjustment mechanism based on the system pressure helps to improve the stability of the air-conditioning system and reduce shutdowns and failures caused by abnormal pressure.

[0049] The control device of the air conditioner according to the third aspect embodiment of the present invention based on the first aspect embodiment of the present invention includes:

[0050] An acquisition module for acquiring the current working parameters of the compressor;

[0051] A first control module for calculating the calculated water flow rate of the chilled water flowing through the evaporator or the calculated water flow rate of the cooling water flowing through the condenser according to the current working parameters of the compressor;

[0052] A second control module for controlling and adjusting the opening degree of the first bypass valve according to the calculated water flow rate of the chilled water, or controlling and adjusting the opening degree of the second bypass valve according to the calculated water flow rate of the cooling water.

[0053] The present invention provides an air conditioner and its control method, and this method has at least the following advantages compared with the related art: (1) Dynamic adjustment: The control method of the present invention can dynamically adjust the water flow according to the real-time working parameters of the compressor, while the traditional technology usually adopts fixed settings and cannot be adjusted according to actual needs. (2) Real-time response and precise control: The control system of the present invention can monitor the system state in real time and make rapid adjustments, with a faster response speed than the traditional technology. And by calculating parameters such as the suction and discharge saturation temperatures and current of the compressor, the present invention can more precisely control the water flow and optimize the heat exchange efficiency. (3) Energy efficiency optimization: By precisely controlling the water flow, the present invention can improve the energy efficiency of the air conditioner system and reduce energy waste. (4) System stability: The present invention improves the operating stability of the chiller by maintaining an appropriate water flow and reduces performance fluctuations caused by abnormal water flow. (5) Comprehensive protection and extended equipment life: The present invention designs low-water-flow and high-water-flow protection mechanisms, which can protect the system from damage and reduce the failure rate. In this way, through effective water flow control and system protection, the present invention helps to extend the service life of key components in the air conditioner system, such as the compressor. (6) Reduced maintenance cost and strong adaptability: Since the system can automatically adjust and protect itself, the need for manual intervention is reduced, thereby reducing the maintenance cost. And the present invention can adapt to different working conditions and environmental changes, with better adaptability and flexibility.

[0054] In summary, for the air conditioner and its control method according to the embodiments of the present invention, the water flow is calculated by the unit load and temperature difference obtained by calculating parameters such as the suction and discharge saturation temperatures and current of the compressor during operation, and the water flow in the unit is effectively adjusted in cooperation with the bypass regulation of the water circuit to ensure the stable operation of the water flow in the unit, aiming to improve the operating stability of the chiller. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0056] Figure 1 It is a schematic structural diagram of the air conditioner provided by the present invention;

[0057] Figure 2 It is a schematic flowchart of the control method of the air conditioner provided by the present invention;

[0058] Figure 3 It is a schematic structural diagram of the control device of the air conditioner provided by the present invention;

[0059] Figure 4It is a schematic structural diagram of the electronic device provided by the present invention.

[0060] Reference numerals:

[0061] 1. Compressor; 2. Condenser; 3. Evaporator; 4. Expansion valve; 5. Refrigerant pipeline; 61. Chilled water pipeline; 62. First water tank; 63. First bypass valve; 64. First water pump; 65. First filter;

[0062] 71. Cooling water pipeline; 72. Second water tank; 73. Second bypass valve; 74. Second water pump; 75. Second filter; 8. Refrigerant bypass valve; 110. Acquisition module; 120. First control module; 130. Second control module. Detailed implementation manners

[0063] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0064] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without conflict, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0065] The following introduces an air conditioner and a control method and a control device for the air conditioner according to the present invention with reference to the accompanying drawings.

[0066] As Figure 1 shown, the air conditioner according to the first aspect embodiment of the present invention includes: a refrigerant circuit, a chilled water circuit, a cooling water circuit and a control device.

[0067] The refrigerant circuit includes a compressor 1, a condenser 2, an expansion valve 4 and an evaporator 3 connected through a refrigerant pipeline 5.

[0068] The chilled water circuit includes a chilled water pipe 61, a first water tank 62, and a first bypass valve 63. The chilled water pipe 61 flows through the evaporator 3, and the first water tank 62 and the first bypass valve 63 are in parallel. In this way, the chilled water flowing out of the evaporator 3 is divided into two paths. One path enters the first water tank 62, and the other path continues to participate in the chilled water circulation process after flowing through the first bypass valve 63.

[0069] It can be understood that the flow rate of the chilled water flowing through the evaporator 3 can be adjusted by adjusting the opening degree of the first bypass valve 63. Specifically, after increasing the opening degree of the first bypass valve 63, the flow rate of the chilled water entering and stored in the water tank decreases, while the flow rate of the water flowing through the first bypass valve 63 and continuing to participate in the chilled water circulation increases. Therefore, the flow rate of the chilled water flowing through the evaporator 3 also increases accordingly.

[0070] The cooling water circuit includes a cooling water pipe 71, a second water tank 72, and a second bypass valve 73. The cooling water pipe 71 flows through the condenser 2, and the second water tank 72 and the second bypass valve 73 are in parallel. In this way, the cooling water flowing out of the condenser 2 is divided into two paths. One path enters the second water tank 72, and the other path continues to participate in the cooling water circulation process after flowing through the second bypass valve 73.

[0071] It can be understood that the flow rate of the cooling water flowing through the condenser 2 can be adjusted by adjusting the opening degree of the second bypass valve 73. Specifically, after increasing the opening degree of the second bypass valve 73, the flow rate of the cooling water entering and stored in the water tank decreases, while the flow rate of the water flowing through the second bypass valve 73 and continuing to participate in the cooling water circulation increases. Therefore, the flow rate of the cooling water flowing through the condenser 2 also increases accordingly.

[0072] The control device is used to obtain the current operating parameters of the compressor 1; calculate the calculated water flow rate of the chilled water flowing through the evaporator 3 or the calculated water flow rate of the cooling water flowing through the condenser 2 according to the current operating parameters of the compressor 1; control and adjust the opening degree of the first bypass valve 63 according to the calculated chilled water flow rate, or control and adjust the opening degree of the second bypass valve 73 according to the calculated cooling water flow rate.

[0073] Specifically, if the calculated chilled water flow rate is lower than the set low water flow rate protection value, the control device will increase the opening degree of the first bypass valve 63 to increase the flow rate of the chilled water flowing through the evaporator 3 to protect the system and improve the heat exchange efficiency; or, if the calculated cooling water flow rate is lower than the set low water flow rate protection value, the control device will increase the opening degree of the second bypass valve 73 to increase the flow rate of the cooling water flowing through the condenser 2 to protect the system and improve the heat exchange efficiency.

[0074] If the calculated chilled water flow rate is higher than the set high water flow rate protection value, the control device will reduce the opening degree of the first bypass valve 63 to reduce the chilled water flow rate through the evaporator 3 and prevent problems such as excessive water resistance and heat exchange tube erosion; if the calculated cooling water flow rate is higher than the set high water flow rate protection value, the control device will reduce the opening degree of the second bypass valve 73 to reduce the cooling water flow rate through the condenser 2 and prevent problems such as excessive water resistance and heat exchange tube erosion.

[0075] In summary, the air conditioner of the present invention has the following advantages: (1) Precise control: By calculating parameters such as the suction and discharge saturation temperatures and currents of the compressor 1, the system can accurately calculate and adjust the water flow rate, improving the accuracy of water flow rate control. (2) Protection mechanism: The system is designed with low and high water flow rate protection values. By dynamically adjusting the opening degree of the bypass valve through the control device, it can effectively prevent damage to the system caused by too low or too high water flow rate. (3) Improve heat exchange efficiency: By adjusting the bypass valve, the system can increase or decrease the water flow rate through the evaporator 3 or condenser 2 according to actual needs, optimize the heat exchange process, and improve the energy efficiency of the air conditioner. (4) System stability: By maintaining the water flow rate within the normal range, the system can ensure the stable operation of the chiller and reduce shutdowns or performance degradation caused by abnormal water flow rate. (5) Reduce the failure rate: Through effective water flow rate control and system protection, it reduces damage to the compressor 1 and other potential failures caused by water flow rate problems, and extends the service life of the equipment. (6) Automatic adjustment: The control device can automatically adjust the water flow rate according to real-time parameters, reducing manual intervention and improving the intelligence level of the system.

[0076] As Figure 1 shown, according to some embodiments of the present invention, a refrigerant bypass valve 8 is also connected between the condenser 2 and the evaporator 3, and the control device is used to obtain the system pressure of the air conditioner and adjust the opening degree of the refrigerant bypass valve 8 according to the system pressure.

[0077] It should be explained that the refrigerant bypass valve 8 is a valve connected between the evaporator 3 and the condenser 2. When the system pressure of the air conditioner unit is greater than the high pressure protection value, the refrigerant bypass valve 8 is opened to relieve pressure on the system, reduce damage to the compressor 1, and reduce the failure rate.

[0078] It can be understood that once the system pressure exceeds the protection value, the control device will open the refrigerant bypass valve 8. After the refrigerant bypass valve 8 is opened, part of the refrigerant will bypass the condenser 2 and directly flow back to the evaporator 3, thereby reducing the amount of refrigerant in the system to achieve the purpose of pressure relief.

[0079] In this way, by reducing the system pressure, the refrigerant bypass valve 8 helps to protect the compressor 1 from damage caused by excessive pressure, because continuous high pressure may shorten the service life of the compressor 1 or cause malfunctions. Moreover, by promptly responding to an abnormal increase in the system pressure and taking measures, the refrigerant bypass valve 8 helps to reduce system malfunctions caused by pressure problems, thereby improving the reliability of the entire air-conditioning system.

[0080] As Figure 1 shown, according to some embodiments of the present invention, a first filter 65 and a first water pump 64 are further provided on the chilled water pipe 61, and a second filter 75 and a second water pump 74 are further provided on the cooling water pipe 71.

[0081] The control method and control device of the air conditioner proposed by the present invention will be described below with reference to the accompanying drawings. Among them, before describing the embodiments of the present invention in detail, the entire application scenario will be described first. The control method, control device, electronic device, and computer-readable storage medium of the air conditioner according to the embodiments of the present invention can be applied not only to the local air conditioner but also to the cloud platform in the Internet field, or the cloud platform in other types of Internet fields, or can also be applied to third-party devices. Among them, the third-party devices may include various different types such as mobile phones, tablets, laptops, in-vehicle computers, and other intelligent terminals.

[0082] Only the control method applicable to the air conditioner will be described below as an example. It should be understood that the control method of the embodiments of the present invention can also be applicable to the cloud platform and third-party devices. It should also be pointed out that the control method of the air conditioner introduced in the second aspect of the present invention is implemented based on the air conditioner introduced in the first aspect above as the structure basis.

[0083] As Figure 2 shown, the control method of the air conditioner according to the embodiments of the second aspect of the present invention includes:

[0084] Step S1, obtaining the current working parameters of the compressor 1;

[0085] Step S2, calculating the calculated chilled water flow rate flowing through the evaporator 3 or the calculated cooling water flow rate flowing through the condenser 2 according to the current working parameters of the compressor 1;

[0086] Step S3, controlling and adjusting the opening degree of the first bypass valve 63 according to the calculated chilled water flow rate, or controlling and adjusting the opening degree of the second bypass valve 73 according to the calculated cooling water flow rate.

[0087] The control method of an air conditioner according to an embodiment of the present invention has the following specific working process: First, in step S1, the system acquires the current working parameters of the compressor 1. This step involves monitoring and collecting the real-time working parameters of the running compressor 1, and these parameters may include key indicators such as the suction and discharge saturation temperatures, current, and pressure of the compressor 1. Subsequently, in step S2, the system further calculates the water flow rate. That is, using the working parameters of the compressor 1 obtained in step S1, the system will calculate the calculated water flow rate of the chilled water flowing through the evaporator 3 or the calculated water flow rate of the cooling water flowing through the condenser 2. This calculation process involves specific algorithms or formulas to ensure the accuracy of the water flow rate calculation. Finally, in step S3, the system adjusts the opening degree of the bypass valve. That is, according to the calculated water flow rate of the chilled water or the cooling water calculated in step S2, the system will automatically adjust the opening degree of the first bypass valve 63 or the second bypass valve 73.

[0088] Specifically, if the calculated water flow rate is lower than the preset low water flow rate protection value, the opening degree of the bypass valve will increase to increase the water flow rate flowing through the evaporator 3 or the condenser 2, thereby protecting the system and improving the heat exchange efficiency. On the contrary, if the calculated water flow rate is higher than the preset high water flow rate protection value, the opening degree of the bypass valve will decrease to reduce the water flow rate and prevent problems such as excessive water resistance and erosion of the heat exchange tubes.

[0089] In the related art, in a traditional system, the control of the water flow rate usually relies on the following methods: First, the traditional system may use a flow meter or a water flow switch to monitor and protect the water flow rate, but these devices usually can only provide basic flow monitoring and on-off control and do not have the ability of dynamic adjustment; Second, some systems may include bypass pipelines with fixed settings, but the opening degrees of these pipelines are fixed and cannot be adjusted according to the actual operating state of the system.

[0090] However, the above traditional water flow rate control methods lack the ability to dynamically adjust the water flow rate according to real-time working parameters, so they cannot adapt to complex working conditions such as changes in compressor load or temperature difference. That is, due to the lack of the ability to dynamically adjust the water flow rate according to real-time parameters, the traditional system may not be able to accurately control the water flow rate, resulting in non-optimal heat exchange efficiency. Further, due to the inability to accurately control the water flow rate, the system may not be able to maintain the best energy efficiency under different working conditions, resulting in energy waste. In addition, when the load changes or the environmental conditions change, the traditional system may not be able to maintain a stable water flow rate, affecting the stability and reliability of the system.

[0091] Therefore, in order to solve the technical defects existing in the above related art, the present invention provides a control method for an air conditioner, and this method has at least the following advantages compared with the related art:

[0092] (1) Dynamic adjustment: The control method of the present invention can dynamically adjust the water flow according to the real-time operating parameters of the compressor 1, while traditional technologies usually adopt fixed settings and cannot be adjusted according to actual needs.

[0093] (2) Real-time response and precise control: The control system of the present invention can monitor the system status in real time and make rapid adjustments, with a faster response speed than traditional technologies. And by calculating parameters such as the suction and discharge saturation temperatures and current of the compressor 1, the present invention can more precisely control the water flow and optimize the heat exchange efficiency.

[0094] (3) Energy efficiency optimization: By precisely controlling the water flow, the present invention can improve the energy efficiency of the air-conditioning system and reduce energy waste.

[0095] (4) System stability: The present invention improves the operating stability of the chiller by maintaining an appropriate water flow and reduces performance fluctuations caused by abnormal water flow.

[0096] (5) Comprehensive protection and extended equipment life: The present invention designs low-water-flow and high-water-flow protection mechanisms, which can protect the system from damage and reduce the failure rate. In this way, through effective water flow control and system protection, the present invention helps to extend the service life of key components in the air-conditioning system, such as the compressor 1.

[0097] (6) Reduced maintenance cost and strong adaptability: Since the system can automatically adjust and protect itself, the need for manual intervention is reduced, thus reducing the maintenance cost. And the present invention can adapt to different working conditions and environmental changes, with better adaptability and flexibility.

[0098] In summary, the control method of the air conditioner according to the embodiment of the present invention calculates the water flow of the chilled water flowing through the evaporator 3 or the calculated water flow of the cooling water flowing through the condenser 2 through the unit load and temperature difference obtained by calculating parameters such as the suction and discharge saturation temperatures and current of the compressor 1 in operation, and cooperates with the bypass regulation of the water circuit to effectively regulate the water flow in the unit, ensuring the stable operation of the water flow in the unit, aiming to improve the operating stability of the chiller.

[0099] According to some embodiments of the present invention, the step of calculating the calculated water flow of the chilled water flowing through the evaporator 3 or the calculated water flow of the cooling water flowing through the condenser 2 according to the current operating parameters of the compressor 1 specifically includes:

[0100] Calculate the current cooling capacity of the air conditioner according to the current operating parameters of the compressor 1;

[0101] Obtain the chilled water coefficient, and calculate the calculated water flow of the chilled water according to the current cooling capacity and the chilled water coefficient; or, obtain the cooling water coefficient, and calculate the calculated water flow of the cooling water according to the current cooling capacity and the cooling water coefficient.

[0102] Further, in the step of calculating the current cooling capacity of the air conditioner according to the current operating parameters of the compressor 1, the current operating parameters of the compressor 1 include: the current discharge saturation temperature, the current suction saturation temperature, and the current current of the compressor 1.

[0103] In the above embodiment, the specific calculation processes of the chilled water calculated water flow rate and the cooling water calculated water flow rate are as follows:

[0104] First, the system needs to obtain the current operating parameters of the compressor 1, which include the current discharge saturation temperature, the current suction saturation temperature, and the current current of the compressor 1.

[0105] Using the above-obtained operating parameters of the compressor 1, the system calculates the current cooling capacity of the air conditioner. It can be understood that the cooling capacity refers to the amount of heat that the air conditioning system can remove per unit time and is an important indicator to measure the performance of the air conditioner.

[0106] Further, the system needs to obtain the coefficients related to the chilled water or the cooling water. These coefficients may be obtained based on experimental data, system design parameters, or historical operation data and are used to convert the cooling capacity into the corresponding water flow rate.

[0107] After that, according to the calculated current cooling capacity and the corresponding water coefficient (chilled water coefficient or cooling water coefficient), the system can calculate the required chilled water calculated water flow rate or cooling water calculated water flow rate.

[0108] Among them, the chilled water coefficient may be related to factors such as the heat exchange efficiency of the evaporator 3 and the physical properties of the chilled water (such as specific heat capacity, density), etc.; while the cooling water coefficient may be related to factors such as the heat exchange efficiency of the condenser 2 and the physical properties of the cooling water.

[0109] Finally, after calculating the water flow rate, the system will adjust the opening degree of the first bypass valve 63 (chilled water) or the second bypass valve 73 (cooling water) according to the calculation result to control the actual water flow rate to match the calculated water flow rate.

[0110] In addition, after completing an adjustment process, the control system will continuously monitor the operating parameters of the compressor 1 and the water flow rate to form a closed-loop feedback mechanism. If there is a deviation between the actual water flow rate and the calculated water flow rate, the system will automatically adjust the opening degree of the bypass valve to reduce the deviation and maintain the optimal water flow rate.

[0111] In this way, through this method, the control system of the present invention can achieve precise control of the water flow rate in the air conditioning system, optimize the heat exchange efficiency, and improve the energy efficiency and stability of the entire system. In addition, this method can also adapt to different working conditions and environmental changes and provide a more intelligent and automated control solution.

[0112] For example, the system obtains the exhaust saturation temperature, suction saturation temperature, and current of the current compressor 1. The exhaust saturation temperature, suction saturation temperature, and current are marked as Tc, Te, and I in sequence. Based on the above parameters, the system first calculates the current refrigerating capacity Q of the unit, and the calculation formula is as follows:

[0113] Q = a×Te + b×Tc + c×I - d×Te2 + e×Te×Tc - f×Te×I - g×Tc2 + h×Tc×I - i×I 2 - j×Te3 + k×Te2×Tc - l×Te2×I - m×Te×Tc2 + n×Te×Tc×I - o×Te×I 2 + p×Tc3 - q×Tc2×I + r×Tc×I 2 - s×I3 + t

[0114] In the above calculation formula: a, b, c, d, e, f, g, h, I, g, k, l, m, n, o, p, q, r, s, t are all coefficients.

[0115] Subsequently, the system obtains the chilled water coefficient as u1 and the cooling water coefficient as u2. Therefore, by substituting u1 and u2 into the formula Q = u×q respectively, the calculated chilled water flow rate q1 and the calculated cooling water flow rate q2 can be obtained respectively.

[0116] It should be noted that the above embodiments only serve as examples and do not constitute a specific limitation on the calculation process of the calculated water flow rate of the present invention.

[0117] According to some embodiments of the present invention, the steps of controlling and adjusting the opening degree of the first bypass valve 63 according to the calculated chilled water flow rate specifically include:

[0118] When the calculated chilled water flow rate is less than the first set chilled water flow rate, control and adjust the opening degree of the first bypass valve 63 to increase;

[0119] When the calculated chilled water flow rate is greater than the second set chilled water flow rate, control and adjust the opening degree of the first bypass valve 63 to decrease;

[0120] When the calculated chilled water flow rate is greater than or equal to the first set chilled water flow rate and less than or equal to the second set chilled water flow rate, the opening degree of the first bypass valve 63 remains unchanged.

[0121] In this embodiment, the system presets two key chilled water flow rate values, called the first set chilled water flow rate and the second set chilled water flow rate. These two thresholds define the minimum and maximum water flow rates within the normal operating range.

[0122] The control system calculates the calculated chilled water flow rate flowing through the evaporator 3 in real time and compares it with the above two preset thresholds. According to the comparison results, the control system adopts one of the following three adjustment strategies:

[0123] First, increase the opening degree: If the calculated chilled water flow rate is less than the first set chilled water flow rate, it indicates that the system water flow rate is low. The control system will increase the opening degree of the first bypass valve 63 to increase the chilled water flow rate through the evaporator 3, thereby improving the heat exchange efficiency and preventing potential system damage.

[0124] Second, decrease the opening degree: If the calculated chilled water flow rate is greater than the second set chilled water flow rate, it indicates that the system water flow rate is high. The control system will decrease the opening degree of the first bypass valve 63 to reduce the chilled water flow rate through the evaporator 3 and prevent problems such as excessive water resistance and heat exchange tube erosion.

[0125] Third, keep it unchanged: If the calculated chilled water flow rate is between the first set chilled water flow rate and the second set chilled water flow rate, that is, within the normal water flow range, the control system will keep the opening degree of the first bypass valve 63 unchanged to maintain the current stable operating state.

[0126] The whole process forms a closed-loop control system that can monitor and adjust the water flow rate in real time to ensure that the system always operates within the optimal water flow range.

[0127] In this way, this method realizes the closed-loop control of the chilled water flow rate by precisely adjusting the opening degree of the first bypass valve 63. As a result, the system can not only optimize energy efficiency but also protect the evaporator 3 and the entire air-conditioning system under different operating conditions, extending the service life of the equipment.

[0128] Furthermore, the control method of the air conditioner further includes:

[0129] When the calculated chilled water flow rate is less than the first set chilled water flow rate, obtain the temperature of the chilled water flowing through the evaporator 3;

[0130] If it is determined that the chilled water temperature is greater than the first set chilled water temperature, control the air conditioner to perform a load reduction operation; or, if it is determined that the chilled water temperature is less than the second set chilled water temperature, control the air conditioner to stop.

[0131] Among them, the first set chilled water temperature is greater than the second set chilled water temperature.

[0132] In this embodiment, when the calculated chilled water flow rate is less than the first set chilled water flow rate, the control system will not only adjust the opening degree of the first bypass valve 63 but also obtain the actual temperature of the chilled water flowing through the evaporator 3.

[0133] Among them, the system presets two key chilled water temperature thresholds, called the first set chilled water temperature and the second set chilled water temperature, where the first set chilled water temperature is higher than the second set chilled water temperature.

[0134] Specifically, if the monitored chilled water temperature is greater than the first set chilled water temperature, the control system will determine that there may be a risk of overheating in the current system. To reduce the load and protect the system, the control device will perform a load reduction operation. The load reduction operation may include reducing the operating frequency of compressor 1, reducing the energy input, or other measures to reduce the system load.

[0135] If the monitored chilled water temperature is less than the second set chilled water temperature, the control system will determine that there may be problems of excessive cooling or too low chilled water flow rate in the current system. To protect the system from potential damage, the control device will control the air conditioner to shut down.

[0136] It can be understood that the decision of the control system is based on the comprehensive consideration of the chilled water flow rate and temperature. If the water flow rate is low but the temperature is also low, the system may choose to shut down to avoid problems such as excessive cooling or refrigerant system blockage. On the contrary, if the water flow rate is low but the temperature is high, the system may perform a load reduction operation to reduce the load and prevent overheating.

[0137] In this way, this method provides an intelligent protection mechanism that can protect the air conditioning system under different working conditions and avoid various potential problems caused by too low water flow rate. Through this control strategy, while ensuring the energy efficiency of the system, it also ensures the safe operation of the equipment and extends the service life of the air conditioning system.

[0138] According to some other embodiments of the present invention, the step of controlling and adjusting the opening degree of the second bypass valve 73 according to the calculated cooling water flow rate specifically includes:

[0139] When the calculated cooling water flow rate is less than the first set cooling water flow rate, control and adjust the opening degree of the second bypass valve 73 to increase;

[0140] When the calculated cooling water flow rate is greater than the second set cooling water flow rate, control and adjust the opening degree of the second bypass valve 73 to decrease;

[0141] When the calculated cooling water flow rate is greater than or equal to the first set cooling water flow rate and less than or equal to the second set cooling water flow rate, the opening degree of the second bypass valve 73 remains unchanged.

[0142] In this embodiment, the system presets two key cooling water flow rate values, called the first set cooling water flow rate and the second set cooling water flow rate. These two thresholds define the minimum and maximum water flow rates within the normal operating range of the cooling water circulation system.

[0143] The control system calculates the calculated cooling water flow rate flowing through the condenser 2 in real time and compares it with the above two preset thresholds. According to the comparison results, the control system adopts one of the following three adjustment strategies:

[0144] First, increase the opening: If the calculated cooling water flow rate is less than the first set cooling water flow rate, it indicates that the system water flow rate is low. The control system will increase the opening of the second bypass valve 73 to increase the cooling water flow rate through the condenser 2, thereby improving the heat exchange efficiency and preventing potential system damage.

[0145] Second, decrease the opening: If the calculated cooling water flow rate is greater than the second set cooling water flow rate, it indicates that the system water flow rate is high. The control system will decrease the opening of the second bypass valve 73 to reduce the cooling water flow rate through the condenser 2 and prevent problems such as excessive water resistance and erosion of heat exchange tubes.

[0146] Third, keep unchanged: If the calculated cooling water flow rate is between the first set cooling water flow rate and the second set cooling water flow rate, that is, within the normal water flow range, the control system will keep the opening of the second bypass valve 73 unchanged to maintain the current stable operating state.

[0147] The whole process forms a closed-loop control system that can monitor and adjust the water flow rate in real time to ensure that the system always operates within the optimal water flow range. The design of the control system allows for a quick response to changes in the water flow rate and timely adjustment of the opening of the second bypass valve 73 to adapt to changes in the load of the compressor 1 or fluctuations in environmental conditions.

[0148] In this way, through this precise control method, the system can not only optimize energy efficiency but also protect the condenser 2 and the entire air-conditioning system under different operating conditions, extending the service life of the equipment.

[0149] Furthermore, the control method of the air conditioner further includes:

[0150] When the calculated cooling water flow rate is less than the first set cooling water flow rate, obtain the temperature of the cooling water flowing through the condenser 2;

[0151] If it is determined that the cooling water temperature is greater than the first set cooling water temperature, control the air conditioner to perform a load reduction operation; or, if it is determined that the cooling water temperature is less than the second set cooling water temperature, control the air conditioner to shut down.

[0152] Wherein, the first set cooling water temperature is greater than the second set cooling water temperature.

[0153] In this embodiment, when the calculated cooling water flow rate is less than the first set cooling water flow rate, the control system will not only adjust the opening of the second bypass valve 73 but also obtain the actual temperature of the cooling water flowing through the condenser 2.

[0154] The system presets two key cooling water temperature thresholds, called the first set cooling water temperature and the second set cooling water temperature, where the first set cooling water temperature is higher than the second set cooling water temperature.

[0155] Specifically, if the monitored cooling water temperature is greater than the first set cooling water temperature, the control system will determine that there may be a risk of overheating in the current system. To reduce the load and protect the system, the control device will perform a load reduction operation. The load reduction operation may include reducing the operating frequency of the compressor 1, reducing the energy input, or other measures to reduce the system load.

[0156] If the monitored cooling water temperature is less than the second set cooling water temperature, the control system will determine that there may be a problem of overcooling or too low cooling water flow in the current system. To protect the system from potential damage, the control device will control the air conditioner to shut down.

[0157] It can be understood that the decision of the control system is based on the comprehensive consideration of the cooling water flow and temperature. If the water flow is low but the temperature is also low, the system may choose to shut down to avoid problems such as overcooling or icing of the condenser 2. On the contrary, if the water flow is low but the temperature is high, the system may perform a load reduction operation to reduce the load and prevent overheating.

[0158] In this way, this method provides an intelligent protection mechanism that can protect the air conditioning system under different working conditions and avoid various potential problems caused by too low cooling water flow. Through this control strategy, while ensuring the energy efficiency of the system, it also ensures the safe operation of the equipment and extends the service life of the air conditioning system.

[0159] According to some embodiments of the present invention, the control method of the air conditioner further includes:

[0160] Obtaining the system pressure of the air conditioner;

[0161] Adjusting the opening degree of the refrigerant bypass valve 8 according to the system pressure.

[0162] Further, the step of adjusting the opening degree of the refrigerant bypass valve 8 according to the system pressure specifically includes:

[0163] When the system pressure is greater than the set high-pressure protection value, controlling the refrigerant bypass valve 8 to open or increase the opening degree;

[0164] When the system pressure is less than the set low-pressure protection value, controlling the refrigerant bypass valve 8 to close or decrease the opening degree.

[0165] Wherein, the set high-pressure protection value is greater than the set low-pressure protection value.

[0166] In the above embodiments, the control system monitors the current system pressure of the air conditioning system in real time, which is achieved by a pressure sensor installed on the refrigerant pipeline.

[0167] When the monitored system pressure is greater than the set high - pressure protection value, the control system will identify that the system may be in an over - pressure state. To reduce the pressure and prevent potential damage, the control system will take actions: control the refrigerant bypass valve 8 to open or increase its opening degree, allowing a part of the refrigerant to bypass the condenser 2 and directly return to the evaporator 3, thereby reducing the amount of refrigerant in the system and lowering the system pressure.

[0168] When the monitored system pressure is less than the set low - pressure protection value, the control system will identify that the system may be in an under - pressure state. To increase the pressure and ensure the normal operation of the system, the control system will take actions: control the refrigerant bypass valve 8 to close or reduce its opening degree, reducing the refrigerant flow rate bypassing the condenser 2, so that more refrigerant passes through the condenser 2, thereby increasing the system pressure.

[0169] Among them, the set high - pressure protection value and the set low - pressure protection value are important safety parameters in the control system, ensuring the safe operation of the system between these two thresholds. Usually, the set high - pressure protection value is set higher than the set low - pressure protection value to provide a safe operation window.

[0170] In this way, through this control strategy, the system can dynamically respond to pressure changes, automatically adjust the opening degree of the refrigerant bypass valve 8 to maintain the stability of the system pressure. This automatic adjustment mechanism based on the system pressure helps to improve the stability of the air - conditioning system and reduce shutdowns and failures caused by abnormal pressure.

[0171] Next, the control device of the air - conditioner provided by the present invention will be described. The control device of the air - conditioner described below can be mutually referred to corresponding to the air - conditioner control method described above.

[0172] As Figure 3 shown, the control device of the air - conditioner according to the third - aspect embodiment of the present invention includes:

[0173] An acquisition module 110, configured to acquire the current working parameters of the compressor 1;

[0174] A first control module 120, configured to calculate the calculated water flow rate of the chilled water flowing through the evaporator 3 or the calculated water flow rate of the cooling water flowing through the condenser 2 according to the current working parameters of the compressor 1;

[0175] A second control module 130, configured to control and adjust the opening degree of the first bypass valve 63 according to the calculated water flow rate of the chilled water, or control and adjust the opening degree of the second bypass valve 73 according to the calculated water flow rate of the cooling water.

[0176] Figure 4 Illustrates a schematic diagram of the physical structure of an electronic device, as Figure 4As shown in the figure, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840. Among them, the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 can call the logical instructions in the memory 830 to execute the control method of the air conditioner, including: obtaining the current working parameters of the compressor 1; calculating the calculated water flow rate of the chilled water flowing through the evaporator 3 or the calculated water flow rate of the cooling water flowing through the condenser 2 according to the current working parameters of the compressor 1; controlling and adjusting the opening degree of the first bypass valve 63 according to the calculated water flow rate of the chilled water, or controlling and adjusting the opening degree of the second bypass valve 73 according to the calculated water flow rate of the cooling water.

[0177] In addition, when the logical instructions in the above-mentioned memory 830 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods provided in the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0178] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the air conditioner provided by the above-mentioned various methods, including: obtaining the current working parameters of the compressor 1; calculating the calculated water flow rate of the chilled water flowing through the evaporator 3 or the calculated water flow rate of the cooling water flowing through the condenser 2 according to the current working parameters of the compressor 1; controlling and adjusting the opening degree of the first bypass valve 63 according to the calculated water flow rate of the chilled water, or controlling and adjusting the opening degree of the second bypass valve 73 according to the calculated water flow rate of the cooling water.

[0179] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the control method of the air conditioner provided by the above-mentioned various methods, including: obtaining the current operating parameters of the compressor 1; calculating the calculated water flow rate of the chilled water flowing through the evaporator 3 or the calculated water flow rate of the cooling water flowing through the condenser 2 according to the current operating parameters of the compressor 1; controlling and adjusting the opening degree of the first bypass valve 63 according to the calculated water flow rate of the chilled water, or controlling and adjusting the opening degree of the second bypass valve 73 according to the calculated water flow rate of the cooling water.

[0180] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

[0181] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiments.

[0182] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims

1. An air conditioner, characterized in that, Comprising: A refrigerant circuit, including a compressor, a condenser, an expansion valve, and an evaporator connected by refrigerant pipes; A chilled water circuit, including a chilled water pipe, a first water tank, and a first bypass valve. The chilled water pipe flows through the evaporator, and the first water tank and the first bypass valve are in parallel; A cooling water circuit, including a cooling water pipe, a second water tank, and a second bypass valve. The cooling water pipe flows through the condenser, and the second water tank and the second bypass valve are in parallel; A control device for obtaining the current operating parameters of the compressor; calculating the calculated chilled water flow rate flowing through the evaporator or the calculated cooling water flow rate flowing through the condenser according to the current operating parameters of the compressor; Controlling and adjusting the opening degree of the first bypass valve according to the calculated chilled water flow rate, or controlling and adjusting the opening degree of the second bypass valve according to the calculated cooling water flow rate.

2. The air conditioner according to claim 1, wherein A refrigerant bypass valve is further connected between the condenser and the evaporator, and the control device is used to obtain the system pressure of the air conditioner and adjust the opening degree of the refrigerant bypass valve according to the system pressure.

3. A control method for an air conditioner according to claim 1 or 2, characterized in that, Comprising: Obtaining the current operating parameters of the compressor; Calculating the calculated chilled water flow rate flowing through the evaporator or the calculated cooling water flow rate flowing through the condenser according to the current operating parameters of the compressor; Controlling and adjusting the opening degree of the first bypass valve according to the calculated chilled water flow rate, or controlling and adjusting the opening degree of the second bypass valve according to the calculated cooling water flow rate.

4. The control method of the air conditioner according to claim 3, wherein The step of calculating the calculated chilled water flow rate flowing through the evaporator or the calculated cooling water flow rate flowing through the condenser according to the current operating parameters of the compressor specifically includes: Calculating the current cooling capacity of the air conditioner according to the current operating parameters of the compressor; Obtaining a chilled water coefficient, and calculating the calculated chilled water flow rate according to the current cooling capacity and the chilled water coefficient; or obtaining a cooling water coefficient, and calculating the calculated cooling water flow rate according to the current cooling capacity and the cooling water coefficient.

5. The control method of the air conditioner according to claim 4, characterized in that, In the step of calculating the current cooling capacity of the air conditioner according to the current operating parameters of the compressor, the current operating parameters of the compressor include: the current exhaust saturation temperature, the current suction saturation temperature, and the current current of the compressor.

6. The control method of the air conditioner according to claim 5, wherein, The step of controlling and adjusting the opening degree of the first bypass valve according to the calculated chilled water flow rate specifically includes: When the calculated chilled water flow rate is less than the first set chilled water flow rate, controlling and adjusting the opening degree of the first bypass valve to increase; When the calculated chilled water flow rate is greater than the second set chilled water flow rate, controlling and adjusting the opening degree of the first bypass valve to decrease; When the calculated chilled water flow rate is greater than or equal to the first set chilled water flow rate and less than or equal to the second set chilled water flow rate, the opening degree of the first bypass valve remains unchanged.

7. The control method of the air conditioner according to claim 6, characterized in that, Further comprising: When the calculated chilled water flow rate is less than the first set chilled water flow rate, obtaining the chilled water temperature flowing through the evaporator; If it is determined that the chilled water temperature is greater than the first set chilled water temperature, control the air conditioner to perform a load reduction operation; or, if it is determined that the chilled water temperature is less than the second set chilled water temperature, control the air conditioner to shut down; wherein, the first set chilled water temperature is greater than the second set chilled water temperature.

8. The control method of the air conditioner according to claim 5, wherein The step of controlling and adjusting the opening degree of the second bypass valve according to the calculated water flow rate of the cooling water specifically includes: When the calculated water flow rate of the cooling water is less than the first set cooling water flow rate, control and adjust the opening degree of the second bypass valve to increase; When the calculated water flow rate of the cooling water is greater than the second set cooling water flow rate, control and adjust the opening degree of the second bypass valve to decrease; When the calculated water flow rate of the cooling water is greater than or equal to the first set cooling water flow rate and less than or equal to the second set cooling water flow rate, the opening degree of the second bypass valve remains unchanged.

9. The control method of the air conditioner according to claim 6, characterized in that, It further includes: When the calculated water flow rate of the cooling water is less than the first set cooling water flow rate, obtain the temperature of the cooling water flowing through the condenser; If it is determined that the temperature of the cooling water is greater than the first set cooling water temperature, control the air conditioner to perform a load reduction operation; or, if it is determined that the temperature of the cooling water is less than the second set cooling water temperature, control the air conditioner to shut down; wherein, the first set cooling water temperature is greater than the second set cooling water temperature.

10. The control method of the air conditioner according to any one of claims 3 to 9, characterized in that, It further includes: Obtain the system pressure of the air conditioner; Adjust the opening degree of the refrigerant bypass valve according to the system pressure.

11. The control method of the air conditioner according to claim 10, characterized in that, The step of adjusting the opening degree of the refrigerant bypass valve according to the system pressure specifically includes: When the system pressure is greater than the set high-pressure protection value, control the refrigerant bypass valve to open or increase the opening degree; When the system pressure is less than the set low-pressure protection value, control the refrigerant bypass valve to close or decrease the opening degree; wherein, the set high-pressure protection value is greater than the set low-pressure protection value.

12. A control device for an air conditioner according to claim 1 or 2, characterized in that, It includes: An acquisition module, configured to acquire the current working parameters of the compressor; A first control module, configured to calculate the calculated water flow rate of the chilled water flowing through the evaporator or the calculated water flow rate of the cooling water flowing through the condenser according to the current working parameters of the compressor; A second control module, configured to control and adjust the opening degree of the first bypass valve according to the calculated water flow rate of the chilled water, or control and adjust the opening degree of the second bypass valve according to the calculated water flow rate of the cooling water.

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