Heat exchanger, water chilling unit, control method and device and medium

Abstract

The invention provides a heat exchanger, a water chilling unit, a control method and device and a medium. The heat exchanger comprises a main body part, the main body part comprises a circulation piece and at least two heat exchange pieces, the circulation piece and the at least two heat exchange pieces are arranged in the preset direction, and at least one circulation piece is arranged between every two adjacent heat exchange pieces; a first channel for circulating a medium to be subjected to heat exchange is arranged in the circulating part, and a second channel for circulating a heat exchange medium is arranged in the heat exchange part; the liquid storage shell is arranged on the main body part, a liquid storage cavity is defined by the liquid storage shell, and the second channels of the at least two heat exchange pieces communicate with the liquid storage cavity; the liquid level detection piece is arranged on the main body part; the liquid level detection piece is used for detecting the liquid level height in the liquid storage cavity. By means of the technical scheme, the technical problem that in the prior art, the refrigerant amount in the heat exchanger is difficult to accurately monitor can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to a heat exchanger, a chiller, a control method, a device and a medium. Background Art

[0002] Currently, precise control of refrigerant flow during chiller operation is crucial for ensuring energy efficiency and stability. Traditional chillers typically use temperature sensors or pressure transducers to monitor the refrigerant status in the heat exchanger. These sensors indirectly determine the appropriate refrigerant charge by measuring suction temperature, evaporation temperature, or system pressure.

[0003] However, as precision electronic components, temperature sensors and pressure sensors have a certain failure rate. In actual applications, due to factors such as broken wires, sensor aging, and environmental interference, these sensors may experience measurement errors or fail completely, resulting in the unit being unable to accurately obtain information about the refrigerant status. For example, due to its thin connecting wires and fragile sensing elements, the temperature sensor is susceptible to physical damage or electrical interference, especially when the chiller is frequently started and stopped or in harsh operating environments. When measuring pressure in the refrigerant system, pressure sensors may be affected by impurities, ice, or overheating in the refrigerant, resulting in unstable measurement results or sensor damage. Once these sensors fail, traditional control systems will be unable to obtain real-time superheat or pressure information of the refrigerant, affecting the control accuracy of the refrigerant quantity. In severe cases, it may even prevent the unit from starting or operating normally, increasing maintenance costs and downtime. Summary of the Invention

[0004] The main purpose of the present invention is to provide a heat exchanger, a chiller, a control method, a device and a medium to solve the technical problem in the prior art that the amount of refrigerant in the heat exchanger is difficult to accurately monitor.

[0005] In order to achieve the above object, according to one aspect of the present invention, a heat exchanger is provided, comprising:

[0006] The main body includes a circulation member and at least two heat exchange members, the circulation member and the at least two heat exchange members are arranged along a preset direction, and at least one circulation member is provided between two adjacent heat exchange members; the circulation member has a first channel for circulating the heat exchange medium, and the heat exchange member has a second channel for circulating the heat exchange medium;

[0007] A liquid storage shell is provided on the main body, the liquid storage shell encloses a liquid storage cavity, and the second channels of at least two heat exchange elements are both connected to the liquid storage cavity;

[0008] The liquid level detection component is arranged on the main body; the liquid level detection component is used to detect the liquid level height in the liquid storage cavity.

[0009] Furthermore, there are at least two circulation elements, and at least two circulation elements and at least two heat exchange elements are alternately arranged; and / or,

[0010] The main body is provided with a mounting hole extending in a preset direction, and the liquid storage housing is inserted into the mounting hole; the mounting hole includes a first hole section located on the circulation element and a second hole section located on the heat exchange element, the second hole section is provided with a circulation hole, and the liquid storage cavity and the second channel are both connected to the circulation hole; and / or,

[0011] The liquid level detecting component is arranged on one side of the liquid storage housing and is spaced apart from the liquid storage housing.

[0012] Furthermore, one side of the heat exchanger has an inlet for introducing the heat exchange medium, and the other side of the heat exchanger has an outlet for discharging the heat exchange medium, and the liquid storage cavity extends from one side to the other side of the heat exchanger.

[0013] Furthermore, the heat exchange element has a first side portion and a second side portion that are oppositely arranged, and a third side portion and a fourth side portion that are oppositely arranged, the first side portion and the third side portion are arranged at a first preset angle, and the second side portion and the fourth side portion are arranged at a second preset angle, and the first preset angle and the second preset angle are both greater than 0 degrees and less than 180 degrees; an inlet for introducing a heat exchange medium is provided on the first side portion, and an outlet for discharging the heat exchange medium is provided on the second side portion;

[0014] Wherein, along the direction from the first side portion to the second side portion, the liquid storage housing is arranged in the middle of the second channel or on a side of the middle of the second channel close to the first side portion; and / or,

[0015] Along the direction from the third side portion to the fourth side portion, the liquid storage housing is arranged in the middle of the second channel; and / or,

[0016] The liquid storage shell has a first side plate and a second side plate, and the first side plate and the second side plate are arranged at intervals along the direction from the third side portion to the fourth side portion; a first through hole is provided on the first side plate, and a second through hole is provided on the second side plate, and both the first through hole and the second through hole are used to communicate with the second channel.

[0017] Furthermore, the heat exchanger further comprises a protrusion, which is located in the liquid storage cavity and is provided on the liquid storage housing;

[0018] There are multiple protrusions, which are spaced apart on the liquid storage housing; and / or,

[0019] A communicating hole is provided in the protruding piece, and the second channel and the liquid storage cavity are both connected to the communicating hole.

[0020] According to another aspect of the present invention, a chiller is provided, comprising: the heat exchanger provided above.

[0021] Furthermore, the chiller also includes:

[0022] A valve body and a pipeline, one end of the pipeline is used to pass the heat exchange medium, and the other end is used to communicate with the heat exchanger. The valve body is arranged on the pipeline, and the opening of the valve body can be adjusted;

[0023] The control element, the valve body and the liquid level detection element are all connected to the control element to adjust the opening of the valve body according to the detection result of the liquid level detection element.

[0024] According to another aspect of the present invention, a control method for a chiller is provided, which is applicable to the chiller provided above. The control method for the chiller includes:

[0025] Obtaining the liquid level in the liquid storage chamber of the heat exchanger;

[0026] Compare the liquid level with the preset liquid level;

[0027] The amount of heat exchange medium introduced into the heat exchanger is controlled according to the comparison result between the liquid level height and the preset liquid level height.

[0028] Furthermore, controlling the flow rate of the heat exchange medium into the heat exchanger according to the comparison result between the liquid level height and the preset liquid level height includes:

[0029] When the difference between the liquid level height and the preset liquid level height is within the preset deviation range, the amount of heat exchange medium flowing into the heat exchanger is maintained at the current state;

[0030] When the difference between the liquid level height and the preset liquid level height exceeds the preset deviation range; when the liquid level height is lower than the preset liquid level height, the flow rate of heat exchange medium into the heat exchanger is increased; when the liquid level height is higher than the preset liquid level height, the flow rate of heat exchange medium into the heat exchanger is reduced.

[0031] Furthermore, increasing the flow rate of heat exchange medium into the heat exchanger includes:

[0032] Compare the liquid level with the preset alarm level;

[0033] When the liquid level is less than or equal to the preset alarm level, the flow rate of the heat exchange medium in the heat exchanger is set to the maximum value.

[0034] Furthermore, there are multiple preset liquid level heights, the chiller has multiple preset operating conditions, the multiple preset liquid level heights are set in one-to-one correspondence with the multiple preset operating conditions, and comparing the liquid level height with the preset liquid level height includes:

[0035] Get the current operating status of the chiller;

[0036] Determine whether the current operating condition of the chiller meets one of multiple preset operating conditions;

[0037] When the current operating condition of the chiller meets one of the plurality of preset operating conditions, the preset liquid level height is set to a preset liquid level height corresponding to one of the plurality of preset operating conditions;

[0038] When the current operating condition of the chiller does not conform to any one of the plurality of preset operating conditions or the current operating condition of the chiller cannot be obtained, the preset liquid level height is set to a preset fixed height.

[0039] According to another aspect of the present invention, a control device for a chiller is provided, for executing the control method for a chiller provided above, the control device for the chiller comprising:

[0040] An acquisition unit, used for acquiring the liquid level height in the liquid storage chamber of the heat exchanger;

[0041] A comparison unit, used for comparing the liquid level height with a preset liquid level height;

[0042] The control unit is used to control the amount of heat exchange medium flowing into the heat exchanger according to the comparison result between the liquid level height and the preset liquid level height.

[0043] According to yet another aspect of the present invention, a nonvolatile storage medium is provided. The nonvolatile storage medium includes a stored program, wherein when the program is running, the device where the nonvolatile storage medium is located is controlled to execute the control method of the chiller provided above.

[0044] The technical solution of the present invention integrates a liquid storage chamber and a liquid level detector within the heat exchanger. Even if the temperature sensor or pressure sensor fails, the heat exchanger can still indirectly monitor and adjust the amount of heat exchange medium introduced by detecting the liquid level within the liquid storage chamber, maintaining the refrigerant within an optimal liquid level range. This ensures stable operation of the heat exchanger even in the event of sensor failure and significantly improves the overall reliability of the system. Furthermore, the liquid storage housing is located on the main body, and all secondary channels are connected to the liquid storage chamber. This arrangement provides a centralized and stable liquid level monitoring point, enabling the liquid level detector to accurately and in real time monitor the average liquid level changes of the heat exchange medium in all secondary channels, thereby more accurately reflecting the refrigerant status within the heat exchanger and ensuring stable system operation. Furthermore, liquid level detection within the liquid storage chamber not only provides a control basis during normal operation, but also serves as a visual indicator during maintenance to determine whether the refrigerant supply is sufficient and whether there are any leaks in the system. By observing the liquid level changes in the liquid storage chamber, maintenance personnel can quickly diagnose the system status and promptly replenish refrigerant or repair the system, reducing maintenance difficulty and time costs. Therefore, the technical solution of the present invention can solve the technical problem in the prior art that the amount of refrigerant in the heat exchanger is difficult to accurately monitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0046] Figure 1 It shows a schematic structural diagram of a heat exchanger provided according to the first embodiment of the present invention;

[0047] Figure 2 A schematic diagram of the combined structure of the circulation element and the heat exchange element of the heat exchanger provided in accordance with the first embodiment of the present invention is shown;

[0048] Figure 3 Show Figure 1 An enlarged schematic diagram of the internal structure of the liquid storage chamber;

[0049] Figure 4 It shows a schematic structural diagram of a chiller provided according to the second embodiment of the present invention;

[0050] Figure 5 A schematic diagram showing the steps of a method for controlling a chiller according to a third embodiment of the present invention is shown.

[0051] The above drawings include the following reference numerals:

[0052] 10. Main body;

[0053] 11. Circulation documents;

[0054] 111, first channel;

[0055] 12. Heat exchange components;

[0056] 121, Second Channel;

[0057] 122. Entrance;

[0058] 123. outflow;

[0059] 1201, first side portion;

[0060] 1202, second side portion;

[0061] 1203, third side;

[0062] 1204, fourth side;

[0063] 20. Liquid storage housing;

[0064] 21. Liquid storage chamber;

[0065] 30. Liquid level detection parts;

[0066] 40. Raised parts;

[0067] 41. Communication hole;

[0068] 100. Condenser;

[0069] 200, valve body;

[0070] 300, pipeline;

[0071] 400, control components;

[0072] 500, heat exchanger;

[0073] 600, compressor;

[0074] 700, temperature sensing package;

[0075] 800. Evaporation pressure sensor. DETAILED DESCRIPTION

[0076] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0077] like Figures 1 to 3As shown, embodiment 1 of the present invention provides a heat exchanger 500, which includes a main body 10, a liquid storage shell 20, and a liquid level detection component 30. The main body 10 includes a circulation component 11 and at least two heat exchange components 12. The circulation component 11 and the at least two heat exchange components 12 are arranged along a preset direction, and at least one circulation component 11 is provided between two adjacent heat exchange components 12; the circulation component 11 has a first channel 111 for circulating the medium to be exchanged, and the heat exchange component 12 has a second channel 121 for circulating the heat exchange medium. The liquid storage shell 20 is provided on the main body 10, and the liquid storage shell 20 encloses a liquid storage cavity 21. The second channels 121 of at least two heat exchange components 12 are both connected to the liquid storage cavity 21. The liquid level detection component 30 is provided on the main body 10; the liquid level detection component 30 is used to detect the liquid level height in the liquid storage cavity 21.

[0078] The heat exchanger 500 provided in the first embodiment of the present invention integrates a liquid storage chamber 21 and a liquid level detector 30 within the heat exchanger 500. Even if the temperature sensor or pressure sensor fails, the heat exchanger 500 can still indirectly monitor and adjust the amount of heat exchange medium introduced by detecting the liquid level within the liquid storage chamber 21, maintaining the refrigerant within an optimal liquid level range. This ensures stable operation of the heat exchanger 500 even in the event of sensor failure, significantly improving the overall reliability of the system. Furthermore, the liquid storage housing 20 is disposed on the main body 10, and all second channels 121 are connected to the liquid storage chamber 21. This arrangement provides a centralized and stable liquid level monitoring point, facilitating the liquid level detector 30 to accurately and in real time monitor changes in the average liquid level of the heat exchange medium within all second channels 121, thereby more accurately reflecting the refrigerant status within the heat exchanger 500 and ensuring stable system operation. Furthermore, liquid level detection within the liquid storage chamber 21 not only provides a control basis during normal operation, but also serves as a visual indicator for determining refrigerant sufficiency and system leaks during maintenance. By observing the changes in the liquid level in the liquid storage chamber 21, maintenance personnel can quickly diagnose the system status and promptly refill the refrigerant or repair the system, reducing maintenance difficulty and time costs. Therefore, the heat exchanger provided in this embodiment can solve the technical problem of the difficulty in accurately monitoring the refrigerant amount in the heat exchanger in the prior art.

[0079] It should be noted that by integrating the liquid storage chamber 21 and the liquid level detection element 30 within the heat exchanger 500 to facilitate determining the amount of heat exchange medium within the heat exchanger 500, this technical solution realizes automated and continuous monitoring of the refrigerant liquid level within the liquid storage chamber 21. Compared to the technical solution in the prior art that requires the heat exchange medium within the heat exchanger 500 to be drawn out and passed into the measuring device for measurement, this arrangement of the present solution does not require manual operation, improves the accuracy and reliability of liquid level detection, and is not affected by external observation conditions or the observer. Moreover, this measurement is performed entirely within the heat exchanger 500, without requiring the heat exchange medium within the heat exchanger 500 to flow out of the heat exchanger 500, and does not affect the normal heat exchange operation of the heat exchanger 500, thereby not affecting the heat exchange efficiency of the heat exchanger 500. Therefore, the liquid level detection solution of the liquid storage chamber 21 provides an intuitive basis for maintenance and fault diagnosis, simplifies the maintenance process, reduces the reliance on professional skills, and can provide early warning of refrigerant anomalies to avoid system deterioration.

[0080] Specifically, the medium to be heat exchanged is water, and the heat exchange medium is refrigerant.

[0081] Specifically, the detection end of the liquid level detector 30 is located within the liquid storage chamber 21. Because the detection end is directly located within the liquid storage chamber 21, it can monitor changes in the refrigerant level within the liquid storage chamber 21 in real time, providing reliable real-time data for the control system. This direct contact detection avoids the potential errors caused by indirect liquid level inference based on temperature or pressure. This ensures that even in the event of a sensor failure, refrigerant status information can still be obtained through the liquid level detector 30, maintaining the operational stability and control accuracy of the entire system.

[0082] Specifically, a through hole is provided at a portion of the liquid storage housing 20 opposite the second channel 121, so that the second channel 121 communicates with the liquid storage chamber 21. This ensures that the heat exchange medium can smoothly enter the liquid storage chamber 21 from the second channel 121, thereby achieving effective circulation of the heat exchange medium between the heat exchange element 12 and the liquid storage chamber 21.

[0083] Specifically, there are at least two circulation elements 11, and the at least two circulation elements 11 and the at least two heat exchange elements 12 are arranged alternately. In this way, the alternating arrangement of the circulation elements 11 and the heat exchange elements 12 optimizes the flow path of the heat exchange medium, promotes uniform heat exchange between the refrigerant and the medium to be heat exchanged, and improves heat exchange efficiency.

[0084] Specifically, two adjacent circulation members 11 among at least two circulation members 11 are interconnected, and two adjacent heat exchange members 12 among at least two heat exchange members 12 are interconnected. At least two circulation members 11 and at least two heat exchange members 12 are alternately arranged so that the first channels 111 within each circulation member 11 are combined to form a zigzag or S-shaped flow channel, and the second channels 121 within each heat exchange member 12 are combined to form a zigzag or S-shaped flow channel. This effectively optimizes the flow paths of the heat exchange medium and the medium to be heat exchanged, and reduces the space occupied while ensuring the length of the flow path. In addition, such a flow channel design can reduce the pressure drop and flow resistance of the refrigerant during the heat exchange process, maintain the continuity and stability of the refrigerant flow, and thus improve the overall energy efficiency of the system.

[0085] It should be noted that the heat exchange medium (such as water) and the refrigerant flow between the channels of the circulation member 11 and the heat exchange member 12 respectively. By alternating the arrangement of at least two circulation members 11 and at least two heat exchange members 12, the heat exchange medium in the circulation member 11 can be fully contacted with the refrigerant in the heat exchange members 12 on both sides of the circulation member 11, thereby increasing the heat exchange area and thus improving the heat exchange efficiency.

[0086] Specifically, the circulation element 11 and the heat exchange element 12 are spaced apart from each other. The side of the circulation element 11 close to one of the two adjacent heat exchange elements 12 and the side of one of the two adjacent heat exchange elements 12 close to the circulation element 11 together form a first channel 111. The side of the other of the two adjacent heat exchange elements 12 close to the circulation element 11 and the side of the circulation element 11 close to the other of the two adjacent heat exchange elements 12 together form a second channel 121. In this way, orderly circulation and efficient heat exchange between the medium to be exchanged and the heat exchange medium are achieved within the heat exchanger 500.

[0087] Specifically, the main body 10 is provided with a mounting hole extending along a preset direction, and the liquid storage shell 20 is inserted into the mounting hole; the mounting hole includes a first hole section located on the circulation member 11 and a second hole section located on the heat exchange member 12, and the second hole section is provided with a circulation hole, and the liquid storage chamber 21 and the second channel 121 are both connected to the circulation hole. With such a structural setting, the setting of the mounting hole provides precise positioning and assembly for the liquid storage shell 20, ensuring reliable communication between the liquid storage chamber 21 and the second channel 121. The presence of the circulation hole allows the refrigerant to flow smoothly from the second channel 121 into the liquid storage chamber 21, while ensuring a stable liquid level of the refrigerant in the liquid storage chamber 21. This structural design simplifies the assembly process of the heat exchanger 500, improves production efficiency, and also improves the detection accuracy of the liquid level detection member 30 and the operational stability of the entire system.

[0088] Specifically, the liquid storage chamber 21 and the first channel 111 are isolated from each other. This isolation design ensures that the liquid level monitoring of the heat exchange medium and the heat exchange medium in the liquid storage chamber 21 do not interfere with each other, ensuring the accuracy of liquid level detection and the purity of the heat exchange process, thereby improving the heat exchange efficiency and the overall stability and reliability of the system.

[0089] Specifically, the liquid level detector 30 is positioned on one side of the liquid storage housing 20 and spaced apart from the housing 20. This structural arrangement reduces interference between the liquid storage housing 20 and the liquid level detector 30, improving the stability and accuracy of liquid level detection. This design also facilitates the installation and maintenance of the liquid level detector 30, reducing the failure rate caused by improper installation or maintenance of the liquid level detector 30, further enhancing the system's ability to respond to sensor failures and overall operational reliability.

[0090] Specifically, one side of the heat exchanger 12 has an inlet 122 for introducing the heat exchange medium, and the other side of the heat exchanger 12 has an outlet 123 for discharging the heat exchange medium. The liquid storage chamber 21 extends from one side of the heat exchanger 12 to the other side. This structural arrangement ensures smooth circulation of the heat exchange medium within the heat exchanger 12. At the same time, the arrangement of the liquid storage chamber 21 extending along the flow direction of the heat exchange medium allows the refrigerant to pass through the liquid storage chamber 21 during the process of entering and flowing out of the heat exchanger 12, thereby ensuring that the liquid level detection component 30 can monitor the actual liquid level changes of the refrigerant in the heat exchanger 500 in real time. The extended design of the liquid storage chamber 21 can also provide sufficient space to stabilize the refrigerant liquid level, reduce fluctuations during the liquid level detection process, ensure accurate monitoring of the refrigerant liquid level under different operating conditions, and enhance the operating capacity and energy efficiency performance of the chiller in the event of sensor failure.

[0091] In this embodiment, the heat exchange element 12 has a first side portion 1201 and a second side portion 1202 disposed opposite each other, as well as a third side portion 1203 and a fourth side portion 1204 disposed opposite each other. The first side portion 1201 and the third side portion 1203 are disposed at a first preset angle, while the second side portion 1202 and the fourth side portion 1204 are disposed at a second preset angle. Both the first preset angle and the second preset angle are greater than 0 degrees and less than 180 degrees. An inlet 122 for introducing a heat exchange medium is disposed on the first side portion 1201, and an outlet 123 for discharging the heat exchange medium is disposed on the second side portion 1202. The liquid storage housing 20 is disposed in the middle of the second channel 121 or on a side of the middle portion of the second channel 121 that is close to the first side portion 1201, along the direction from the first side portion 1201 to the second side portion 1202. With such a structural arrangement, the liquid storage shell 20 is located in the middle of the second channel 121 or near the inlet 122, which can detect changes in the refrigerant liquid level earlier, and the control response to the refrigerant filling amount is faster, thereby enhancing the operating stability and energy efficiency of the chiller.

[0092] Specifically, the distance between the liquid storage housing 20 and the inlet 122 is smaller than the distance between the liquid storage housing 20 and the outflow outlet 123. With this structural arrangement, the liquid storage housing 20 is located in the middle of the second channel 121 or near the inlet 122, which can detect changes in the refrigerant level earlier, and the control response to the refrigerant charge amount is more rapid, thereby enhancing the operating stability and energy efficiency of the chiller.

[0093] In this embodiment, the heat exchange element 12 has a first side portion 1201 and a second side portion 1202 disposed opposite each other, as well as a third side portion 1203 and a fourth side portion 1204 disposed opposite each other. The first side portion 1201 and the third side portion 1203 are disposed at a first preset angle, while the second side portion 1202 and the fourth side portion 1204 are disposed at a second preset angle. Both the first preset angle and the second preset angle are greater than 0 degrees and less than 180 degrees. An inlet 122 for introducing a heat exchange medium is provided on the first side portion 1201, and an outlet 123 for discharging the heat exchange medium is provided on the second side portion 1202. The liquid storage housing 20 is disposed in the middle of the second channel 121 along the direction from the third side portion 1203 to the fourth side portion 1204. Such a structural setting can effectively promote the heat exchange medium in the second channel 121 to flow evenly into the liquid storage chamber 21, which is conducive to the liquid level detection component 30 to accurately and in real time monitor the changes in the average liquid level of the heat exchange medium in all second channels 121, thereby more accurately reflecting the refrigerant status in the heat exchanger 500 and ensuring stable operation of the system.

[0094] In this embodiment, the heat exchange element 12 comprises a first side portion 1201 and a second side portion 1202 disposed opposite each other, as well as a third side portion 1203 and a fourth side portion 1204 disposed opposite each other. The first side portion 1201 and the third side portion 1203 are disposed at a first preset angle, while the second side portion 1202 and the fourth side portion 1204 are disposed at a second preset angle. Both the first preset angle and the second preset angle are greater than 0 degrees and less than 180 degrees. The first side portion 1201 is provided with an inlet 122 for introducing a heat exchange medium, and the second side portion 1202 is provided with an outlet 123 for discharging the heat exchange medium. The liquid storage housing 20 comprises a first side plate and a second side plate, which are arranged at intervals along the direction from the third side portion 1203 to the fourth side portion 1204. The first side plate is provided with a first through hole, and the second side plate is provided with a second through hole. Both the first through hole and the second through hole are configured to communicate with the second channel 121. This structural arrangement helps stabilize the refrigerant level within the liquid storage chamber 21, facilitating even entry of the heat exchange medium into the liquid storage chamber 21 through the first and second through-holes, thereby helping the refrigerant form a relatively stable liquid surface within the liquid storage chamber 21. This reduces level fluctuations caused by rapid refrigerant flow, thereby improving the accuracy of the refrigerant level monitoring by the liquid level detector 30. This accurate level detection is crucial for maintaining the operation of the chiller in the event of a sensor failure.

[0095] Specifically, the heat exchanger 500 also includes a protrusion 40, which is located in the liquid storage chamber 21 and is arranged on the liquid storage shell 20. With such a structural arrangement, the arrangement of the protrusion 40 helps to form a stable gas-liquid separation environment inside the liquid storage chamber 21. Since the refrigerant may be a mixture containing liquid and gas during the heat exchange process, the presence of the protrusion 40 can guide the bubbles in the mixture to float up and gather around the protrusion 40 and then be punctured, while the liquid refrigerant is more likely to gather at the bottom of the liquid storage chamber 21, thereby achieving effective separation of gas and liquid in the refrigerant. This design not only improves the accuracy of liquid level detection, but also avoids the interference of bubbles on liquid level measurement, ensuring the reliability of controlling the operation of the chiller through liquid level monitoring in the event of a sensor failure.

[0096] Specifically, there are multiple protrusions 40, each of which is spaced apart on the liquid storage housing 20. This structural arrangement of multiple, spaced-apart protrusions 40 can further optimize the gas-liquid separation within the liquid storage chamber 21. By evenly distributing the multiple protrusions 40 on the liquid storage housing 20, multiple paths are provided for bubbles to rise, promoting effective gas-liquid separation while avoiding the potential blind spots that may exist with a single protrusion 40.

[0097] Specifically, the protrusion 40 has a communication hole 41 therein, and the second channel 121 and the liquid storage chamber 21 are both connected to the communication hole 41. With such a structural arrangement, the existence of the communication hole 41 enables an effective flow path to be formed between the second channel 121 and the liquid storage chamber 21.

[0098] Specifically, the protrusion 40 is a cylindrical structure. In this way, the design of the cylindrical protrusion 40 is not only conducive to the floating and gathering of bubbles, but also can reduce the obstruction to the flow of liquid refrigerant, and promote the uniform distribution of refrigerant in the liquid storage chamber 21. The cylindrical protrusion 40 also has high structural stability and mechanical strength, and can withstand the internal pressure changes of the heat exchanger 500 when it is working, avoiding refrigerant leakage or system failure due to structural problems. In addition, the shape of the cylindrical protrusion can provide a larger contact area, which is conducive to gas-liquid separation, ensuring the accuracy of liquid level detection, and helping to improve the operating stability and energy efficiency of the chiller.

[0099] like Figure 4 As shown, the second embodiment of the present invention provides a chiller, which includes the heat exchanger 500 provided in the first embodiment.

[0100] The chiller provided by the second embodiment of the present invention integrates a liquid storage chamber 21 and a liquid level detector 30 within the heat exchanger 500. Even if the temperature sensor or pressure sensor fails, the heat exchanger 500 can still indirectly monitor and adjust the amount of heat exchange medium introduced by detecting the liquid level within the liquid storage chamber 21, maintaining the refrigerant within an optimal liquid level range. This ensures stable operation of the heat exchanger 500 even in the event of sensor failure, significantly improving the overall reliability of the system. Furthermore, the liquid storage housing 20 is disposed on the main body 10, and all second channels 121 are connected to the liquid storage chamber 21. This arrangement provides a centralized and stable liquid level monitoring point, facilitating the liquid level detector 30 to accurately and in real time monitor changes in the average liquid level of the heat exchange medium within all second channels 121, thereby more accurately reflecting the refrigerant status within the heat exchanger 500 and ensuring stable system operation. Furthermore, liquid level detection within the liquid storage chamber 21 not only provides a control basis during normal operation, but also serves as a visual indicator for determining refrigerant sufficiency and system leaks during maintenance. By observing the changes in the liquid level in the liquid storage chamber 21, maintenance personnel can quickly diagnose the system status and promptly refrigerant replenishment or system repair, reducing maintenance difficulty and time costs. Therefore, the chiller provided by this embodiment can solve the technical problem of the difficulty in accurately monitoring the refrigerant amount in the heat exchanger in the prior art.

[0101] Specifically, the chiller also includes a valve body 200 and a pipeline 300. One end of the pipeline 300 is used to pass a heat exchange medium, and the other end is used to communicate with the heat exchanger 500. The valve body 200 is disposed on the pipeline 300, and the opening of the valve body 200 is adjustable. The chiller also includes a control member 400. The valve body 200 and the liquid level detection member 30 are both connected to the control member 400 to adjust the opening of the valve body 200 according to the detection result of the liquid level detection member 30. With this structural arrangement, by disposing the valve body 200 on the pipeline 300 and adjusting the opening of the valve body 200, the chiller can accurately adjust the amount of heat exchange medium introduced according to actual needs. This precise control is important for optimizing heat exchange efficiency, achieving high energy efficiency, and preventing overcharging or undercharging of the refrigerant. In particular, in the event of a sensor failure, the chiller can still effectively control the refrigerant flow through feedback from the liquid level detection member 30 to ensure stable system operation. The valve body 200 and the liquid level detector 30 are both connected to the control unit 400, enabling automated control of liquid level data collection and valve body 200 opening adjustment. This intelligent management not only improves the operating efficiency of the chiller but also automatically adjusts the refrigerant flow rate based on the liquid level in the liquid storage chamber 21 in the event of a temperature sensor or pressure sensor failure, avoiding control inaccuracies caused by sensor failure and enhancing the reliability and stability of the chiller.

[0102] like Figure 4 As shown, the chiller also includes a condenser 100, a compressor 600, a temperature sensor 700, and an evaporation pressure sensor 800. These components work together to achieve efficient operation and intelligent control of the chiller. The compressor 600 compresses the refrigerant, producing high-pressure, high-temperature refrigerant vapor, which is the power source of the chiller's refrigeration cycle. The temperature sensor 700 and evaporation pressure sensor 800 monitor the chiller's operating status and ensure the system operates under optimal conditions.

[0103] It should be noted that traditional chillers start up and operate by controlling the opening of the electronic expansion valve (equivalent to valve body 200) via suction superheat or exhaust superheat, and then the unit performs real-time adjustments to complete operation. Suction superheat is the most commonly used (suction superheat = suction temperature - evaporation temperature). The evaporation temperature is converted into evaporation temperature through the pressure acquisition of the evaporation pressure sensor 800 through a program. Since the temperature and pressure of the refrigerant are in a one-to-one correspondence under the saturated state of vapor and liquid coexistence, the pressure can be converted into evaporation temperature. The evaporation pressure sensor 800 of a traditional plate heat exchanger is installed on the suction pipe. However, some suction pipes have a complex structure and are affected by the pressure drop caused by the suction pipe's own longitudinal resistance and local resistance. As a result, the collected evaporation pressure is often lower than the actual evaporation pressure, causing data collection to be biased. The suction temperature is collected by installing a suction temperature sensor on the suction pipe. The suction superheat is calculated in real time by subtracting the evaporation temperature from the suction temperature. If the suction superheat is greater than the program set value, it means that the refrigerant is insufficient, resulting in excessive evaporation of the refrigerant. At this time, the electronic expansion valve needs to be opened larger, otherwise the electronic expansion valve needs to be closed smaller.

[0104] like Figure 5 As shown, embodiment three of the present invention provides a control method for a chiller, which is applicable to the chiller in embodiment two. The control method for the chiller includes: obtaining the liquid level height in the liquid storage chamber 21 of the heat exchanger 500; comparing the liquid level height with a preset liquid level height; and controlling the amount of heat exchange medium introduced into the heat exchanger 500 according to the comparison result of the liquid level height and the preset liquid level height.

[0105] The chiller control method provided in the third embodiment of the present invention obtains the liquid level in the liquid storage chamber 21 in real time. Even if the temperature sensor or pressure sensor fails, the chiller can adjust based on the liquid level data and control the amount of heat exchange medium introduced, ensuring that the chiller can maintain basic operation under adverse conditions, thereby enhancing the fault tolerance and operational stability of the entire system. By adjusting the amount of heat exchange medium introduced according to the liquid level, the refrigerant can be replenished or reduced in a timely manner, preventing refrigerant leakage or overfilling, and ensuring that the refrigerant in the liquid storage chamber 21 is maintained at an optimal liquid level, thereby improving the heat exchange efficiency of the heat exchanger 500, reducing energy consumption, and improving the overall energy efficiency of the chiller. In addition, by real-time monitoring and comparing the liquid level in the liquid storage chamber 21 with the preset liquid level, abnormal changes in the refrigerant, such as excessively high or low liquid levels, can be detected early, providing timely warnings of potential faults, such as refrigerant leakage or insufficient refrigerant, providing data support for maintenance and troubleshooting of the chiller, and enhancing the system's self-diagnosis and maintenance capabilities. Therefore, the control method for the chiller provided in this embodiment can solve the technical problem in the prior art that the amount of refrigerant in the heat exchanger is difficult to accurately monitor.

[0106] It should be noted that the preset liquid level height is obtained based on prior testing and big data analysis, and each preset liquid level height corresponds to the optimal heat exchange efficiency under different working conditions.

[0107] Specifically, the method for controlling the flow rate of heat exchange medium into heat exchanger 500 based on the comparison result between the liquid level and a preset liquid level includes: maintaining the flow rate of heat exchange medium into heat exchanger 500 at the current level when the difference between the liquid level and the preset liquid level is within a preset deviation range; increasing the flow rate of heat exchange medium into heat exchanger 500 when the difference between the liquid level and the preset liquid level exceeds the preset deviation range; and decreasing the flow rate of heat exchange medium into heat exchanger 500 when the liquid level is below the preset liquid level. This configuration allows for precise adjustment of the flow rate of heat exchange medium, ensuring that the liquid level in liquid storage chamber 21 remains within an ideal range. This not only improves heat exchange efficiency but also prevents system performance degradation caused by overcharging or undercharging of refrigerant. Even in the event of a sensor failure, the flow rate of heat exchange medium can still be automatically adjusted based on changes in the liquid level, maintaining stable operation of the chiller and enhancing the system's adaptability and reliability.

[0108] Specifically, the preset deviation range includes 0. That is, when the liquid level is the same as the preset liquid level, the amount of heat exchange medium flowing into the heat exchanger 500 is maintained at the current state.

[0109] It should be noted that “increasing the flow rate of heat exchange medium into the heat exchanger 500 ” specifically corresponds to increasing the opening of the valve body 200 , and “reducing the flow rate of heat exchange medium into the heat exchanger 500 ” specifically corresponds to reducing the opening of the valve body 200 .

[0110] It should be noted that "the difference between the liquid level height and the preset liquid level height is within the preset deviation range" means that the difference between the liquid level height and the preset liquid level height is greater than or equal to the minimum value within the preset deviation range and less than or equal to the maximum value within the preset deviation range. "The difference between the liquid level height and the preset liquid level height exceeds the preset deviation range" means that the difference between the liquid level height and the preset liquid level height is greater than the maximum value within the preset deviation range or less than the minimum value within the preset deviation range.

[0111] Specifically, the method for increasing the flow rate of heat exchange medium into the heat exchanger 500 includes: comparing the liquid level with a preset alarm level; and when the liquid level is less than or equal to the preset alarm level, setting the flow rate of heat exchange medium into the heat exchanger 500 to a maximum value. With this configuration, by setting a preset alarm level, the control strategy can quickly respond to situations where the refrigerant level is too low. When the liquid level falls below the preset alarm level, the control system automatically adjusts the flow rate of heat exchange medium to the maximum value, quickly replenishing the refrigerant, preventing the system from shutting down or reducing efficiency due to insufficient refrigerant, ensuring that the chiller can maintain a basic operating state even in extreme situations, and further improving the safety and operational continuity of the system.

[0112] Specifically, when the liquid level is greater than the preset alarm level, the amount of heat exchange medium introduced into the heat exchanger 500 is set to a predetermined value. The predetermined value is greater than the current amount of heat exchange medium introduced into the heat exchanger 500 and less than the maximum value. This setting effectively avoids excessive liquid levels caused by overcharging of the refrigerant, preventing possible leakage and uneven mixing of gas and liquid. By setting a predetermined value that is greater than the current amount introduced and less than the maximum value, the chiller can avoid unnecessary overfilling while ensuring sufficient refrigerant supply, maintaining system efficiency and stability, while reducing energy waste and maintenance costs.

[0113] Specifically, there are multiple preset liquid level heights, and the chiller has multiple preset operating conditions. The multiple preset liquid level heights are set in a one-to-one correspondence with the multiple preset operating conditions. The method for comparing the liquid level height with the preset liquid level height includes: obtaining the current operating condition of the chiller; determining whether the current operating condition of the chiller meets one of the multiple preset operating conditions; if the current operating condition of the chiller meets one of the multiple preset operating conditions, setting the preset liquid level height to a preset liquid level height corresponding to one of the multiple preset operating conditions; if the current operating condition of the chiller does not meet any of the multiple preset operating conditions or the current operating condition of the chiller cannot be obtained, setting the preset liquid level height to a preset fixed height. With such a setting, by corresponding multiple preset liquid level heights to preset operating conditions, the control method can intelligently adapt to operating requirements under different operating conditions. When the sensor detecting the current operating condition is functioning normally, the system can automatically adjust the optimal liquid level height according to the actual operating condition to optimize heat exchange efficiency and system energy efficiency. Even when the operating conditions cannot be detected or the current operating conditions do not have corresponding preset operating conditions, by setting a preset fixed height as the liquid level control benchmark, the basic operation of the chiller can still be ensured, avoiding system failures caused by misjudgment of the operating conditions and enhancing the intelligent control capability and reliability of the chiller.

[0114] It should be noted that the preset fixed height is obtained based on preliminary experiments, and the preset fixed heights of different chillers are different. The corresponding relationship between the multiple preset liquid level heights and the multiple preset operating conditions is also obtained based on preliminary experiments.

[0115] Specifically, the temperature difference between two adjacent preset operating conditions among the multiple preset operating conditions is 1°C.

[0116] A fourth embodiment of the present invention provides a control device for a chiller, which is configured to execute the chiller control method of the third embodiment. The control device comprises an acquisition unit, a comparison unit, and a control unit. The acquisition unit is configured to acquire the liquid level within the liquid storage chamber 21 of the heat exchanger 500; the comparison unit is configured to compare the liquid level with a preset liquid level; and the control unit is configured to control the flow of heat exchange medium into the heat exchanger 500 based on the comparison result between the liquid level and the preset liquid level.

[0117] The chiller control device provided by the fourth embodiment of the present invention obtains the liquid level in the liquid storage chamber 21 in real time. Even if the temperature sensor or pressure sensor fails, the chiller can adjust based on the liquid level data and control the amount of heat exchange medium introduced, ensuring that the chiller can maintain basic operation under adverse conditions, thereby enhancing the fault tolerance and operational stability of the entire system. By adjusting the amount of heat exchange medium introduced according to the liquid level, the refrigerant can be replenished or reduced in a timely manner, preventing refrigerant leakage or overfilling, and ensuring that the refrigerant in the liquid storage chamber 21 is maintained at an optimal liquid level, thereby improving the heat exchange efficiency of the heat exchanger 500, reducing energy consumption, and improving the overall energy efficiency of the chiller. In addition, by real-time monitoring and comparing the liquid level in the liquid storage chamber 21 with the preset liquid level, abnormal changes in the refrigerant, such as excessively high or low liquid levels, can be detected early, providing timely warnings of potential faults, such as refrigerant leakage or insufficient refrigerant, providing data support for maintenance and troubleshooting of the chiller, and enhancing the system's self-diagnosis and maintenance capabilities. Therefore, the control device for the chiller provided in this embodiment can solve the technical problem in the prior art that the amount of refrigerant in the heat exchanger is difficult to accurately monitor.

[0118] A fifth embodiment of the present invention provides a non-volatile storage medium, which includes a stored program. When the program runs, the device where the non-volatile storage medium is located is controlled to execute the control method of the chiller in the third embodiment.

[0119] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: after the temperature and pressure devices on the chiller are damaged, the unit can continue to operate, making the unit more reliable; the plate heat exchanger has been structurally improved, which can more conveniently match the unit performance during the design and development stage, and subsequent maintenance is also more convenient; abnormal pressure changes in the unit can be predicted in advance to prevent the unit from deteriorating and getting out of control.

[0120] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0121] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0122] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0123] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0124] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0125] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A heat exchanger, characterized in that: include: The main body (10) comprises a circulation member (11) and at least two heat exchange members (12), wherein the circulation member (11) and the at least two heat exchange members (12) are arranged along a preset direction, and at least one circulation member (11) is arranged between two adjacent heat exchange members (12); the circulation member (11) has a first channel (111) for circulating a medium to be exchanged, and the heat exchange member (12) has a second channel (121) for circulating a heat exchange medium; A liquid storage shell (20) is arranged on the main body (10), the liquid storage shell (20) encloses a liquid storage cavity (21), and the second channels (121) of at least two of the heat exchange elements (12) are both connected to the liquid storage cavity (21); A liquid level detection component (30) is arranged on the main body (10); the liquid level detection component (30) is used to detect the liquid level height in the liquid storage chamber (21).

2. The heat exchanger according to claim 1, characterized in that: There are at least two circulation elements (11), and at least two circulation elements (11) and at least two heat exchange elements (12) are arranged alternately; and / or, The main body (10) is provided with a mounting hole extending along the preset direction, and the liquid storage housing (20) is inserted into the mounting hole; the mounting hole comprises a first hole section located on the circulation member (11) and a second hole section located on the heat exchange member (12), the second hole section is provided with a circulation hole, and the liquid storage cavity (21) and the second channel (121) are both connected to the circulation hole; and / or, The liquid level detection component (30) is arranged on one side of the liquid storage housing (20) and is spaced apart from the liquid storage housing (20).

3. The heat exchanger according to claim 1, characterized in that: One side of the heat exchange element (12) has an inlet (122) for introducing the heat exchange medium, and the other side of the heat exchange element (12) has an outlet (123) for discharging the heat exchange medium, and the liquid storage chamber (21) is extended from one side to the other side of the heat exchange element (12).

4. The heat exchanger according to claim 1, characterized in that: The heat exchange element (12) comprises a first side portion (1201) and a second side portion (1202) which are arranged opposite to each other, and a third side portion (1203) and a fourth side portion (1204) which are arranged opposite to each other, the first side portion (1201) and the third side portion (1203) are arranged at a first preset angle, the second side portion (1202) and the fourth side portion (1204) are arranged at a second preset angle, and the first preset angle and the second preset angle are both greater than 0 degrees and less than 180 degrees; an inlet (122) for introducing the heat exchange medium is arranged on the first side portion (1201), and an outlet (123) for discharging the heat exchange medium is arranged on the second side portion (1202); Wherein, along the direction from the first side portion (1201) to the second side portion (1202), the liquid storage housing (20) is arranged in the middle of the second channel (121) or on a side of the middle of the second channel (121) close to the first side portion (1201); and / or, Along the direction from the third side portion (1203) to the fourth side portion (1204), the liquid storage housing (20) is arranged in the middle of the second channel (121); and / or, The liquid storage housing (20) comprises a first side plate and a second side plate, wherein the first side plate and the second side plate are arranged at intervals along a direction from the third side portion (1203) to the fourth side portion (1204); a first through hole is arranged on the first side plate, and a second through hole is arranged on the second side plate, wherein the first through hole and the second through hole are both used to communicate with the second channel (121).

5. The heat exchanger according to claim 1, characterized in that: The heat exchanger further comprises a protrusion (40), wherein the protrusion (40) is located in the liquid storage cavity (21) and is arranged on the liquid storage housing (20); There are a plurality of protrusions (40), and the plurality of protrusions (40) are arranged at intervals on the liquid storage housing (20); and / or, The protruding member (40) has a communicating hole (41) therein, and the second channel (121) and the liquid storage chamber (21) are both connected to the communicating hole (41).

6. A chiller, characterized in that: include: The heat exchanger according to any one of claims 1 to 5.

7. The chiller according to claim 6, characterized in that: The chiller also includes: A valve body (200) and a pipeline (300), one end of the pipeline (300) is used to pass a heat exchange medium, and the other end is used to communicate with the heat exchanger, the valve body (200) is arranged on the pipeline (300), and the opening of the valve body (200) is adjustable; A control component (400) is provided, and the valve body (200) and the liquid level detection component (30) are both connected to the control component (400) so as to adjust the opening of the valve body (200) according to the detection result of the liquid level detection component (30).

8. A method for controlling a chiller, characterized in that: Applicable to the chiller according to any one of claims 6 to 7, the control method of the chiller comprises: Obtaining the liquid level in the liquid storage chamber of the heat exchanger; Comparing the liquid level with a preset liquid level; The amount of heat exchange medium introduced into the heat exchanger is controlled according to the comparison result between the liquid level height and the preset liquid level height.

9. The control method of the chiller according to claim 8, characterized in that: The controlling the amount of heat exchange medium introduced into the heat exchanger according to the comparison result between the liquid level height and the preset liquid level height comprises: When the difference between the liquid level height and the preset liquid level height is within a preset deviation range, the amount of heat exchange medium introduced into the heat exchanger is maintained at a current state; When the difference between the liquid level height and the preset liquid level height exceeds the preset deviation range; when the liquid level height is lower than the preset liquid level height, the flow rate of heat exchange medium in the heat exchanger is increased; when the liquid level height is higher than the preset liquid level height, the flow rate of heat exchange medium in the heat exchanger is reduced.

10. The control method of the chiller according to claim 9, characterized in that: The increasing the amount of heat exchange medium introduced into the heat exchanger comprises: comparing the liquid level height with a preset alarm height; When the liquid level height is less than or equal to the preset alarm height, the flow rate of the heat exchange medium in the heat exchanger is set to the maximum value.

11. The control method of a chiller according to claim 8, characterized in that: There are multiple preset liquid level heights, the chiller has multiple preset operating conditions, the multiple preset liquid level heights are set in one-to-one correspondence with the multiple preset operating conditions, and the comparison of the liquid level height and the preset liquid level height includes: Obtaining the current operating condition of the chiller; Determining whether the current operating condition of the chiller meets one of the plurality of preset operating conditions; When the current operating condition of the chiller meets one of the plurality of preset operating conditions, the preset liquid level height is a preset liquid level height corresponding to one of the plurality of preset operating conditions; When the current operating condition of the chiller does not conform to any one of the plurality of preset operating conditions or the current operating condition of the chiller cannot be obtained, the preset liquid level height is set to a preset fixed height.

12. A control device for a chiller, characterized in that: Used to execute the control method of a chiller according to any one of claims 8 to 11, the control device of the chiller comprises: An acquisition unit, used for acquiring the liquid level height in the liquid storage chamber of the heat exchanger; A comparison unit, used for comparing the liquid level height with a preset liquid level height; A control unit is used to control the amount of heat exchange medium introduced into the heat exchanger according to the comparison result between the liquid level height and the preset liquid level height.

13. A non-volatile storage medium, characterized in that: The non-volatile storage medium includes a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute the control method for the chiller according to any one of claims 8 to 11.

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