Water chiller, control method and storage medium

Abstract

The application discloses a water chiller, a control method and a storage medium. The water chiller comprises an evaporator direct connection chilled water system, and further comprises an ice storage device, a first electronic expansion valve and a second electronic expansion valve. The outlet pipeline of the ice storage device is connected with a compressor, and the inlet pipeline of the ice storage device is connected with a heating water tank. The first electronic expansion valve is arranged on a pipeline between the heating water tank and the ice storage device. The second electronic expansion valve is arranged on a pipeline between a condenser and the evaporator. Through the application, a water chiller structure and a control method thereof are provided. By switching the circulating loop of the refrigerant under different working conditions, the evaporator and the condenser can provide independent temperature chilled water / hot water, so that the water chiller can run in an optimal efficiency state under various working conditions, and the optimal efficiency requirement of various water temperature working conditions can be met.

Description

Technical Field

[0001] This invention relates to the field of chiller technology, and more specifically, to a chiller, a control method, and a storage medium. Background Technology

[0002] Conventional chiller units typically consist of one evaporator and one condenser, designed according to a single standard operating condition. When the unit needs to meet various water temperature requirements (cooling, ice making, and hot water production), the evaporator and condenser are not operating at their optimal efficiency under other conditions.

[0003] There is currently no effective solution to the problem that existing water chiller units cannot achieve efficient operation under various working conditions. Summary of the Invention

[0004] This invention provides a chiller unit, a control method, and a storage medium to solve the problem that existing chiller units cannot achieve efficient operation under various working conditions.

[0005] To solve the above-mentioned technical problems, the present invention provides a chiller unit, wherein the chiller unit includes: a compressor, a condenser, and an evaporator connected in sequence, the evaporator being directly connected to a chilled water system, and further includes:

[0006] An ice storage device, whose outlet pipe is connected to a compressor and whose inlet pipe is connected to a heating water tank;

[0007] A first electronic expansion valve is installed on the pipeline between the heating water tank and the ice storage device;

[0008] A second electronic expansion valve is installed on the pipeline between the condenser and the evaporator;

[0009] A first solenoid valve is installed on the pipeline between the second electronic expansion valve and the evaporator;

[0010] The second solenoid valve is installed on the pipeline between the first electronic expansion valve and the ice storage device;

[0011] The third solenoid valve is installed on the first branch, the starting point of the first branch is located on the pipeline between the second electronic expansion valve and the first solenoid valve, and the ending point is located on the pipeline between the first electronic expansion valve and the second solenoid valve.

[0012] The fourth solenoid valve is installed on the second branch, the starting point of which is located on the pipeline between the first electronic expansion valve and the second solenoid valve, and the ending point is located on the pipeline between the first solenoid valve and the evaporator.

[0013] Furthermore, the chiller unit includes:

[0014] The fifth solenoid valve is installed on the pipeline between the compressor and the heating water tank;

[0015] The sixth solenoid valve is installed on the pipeline between the compressor and the condenser. One end of the pipeline containing the sixth solenoid valve is connected to the condenser, and the other end is connected to the pipeline between the compressor and the fifth solenoid valve.

[0016] The present invention also provides a control method for a chiller unit, applied to the above-mentioned chiller unit, wherein the method includes: confirming the operating condition of the chiller unit; and executing a corresponding control strategy according to the operating condition to control the refrigerant circulation loop or the chilled water circulation loop of the chiller unit.

[0017] Furthermore, the operating conditions of the chiller unit include at least: refrigeration condition, refrigeration-heat recovery condition, ice storage condition, and ice storage-heat recovery condition.

[0018] Furthermore, under the refrigeration condition, a corresponding control strategy is executed according to the operating condition to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit, including:

[0019] The second electronic expansion valve, the sixth solenoid valve, and the first solenoid valve are controlled to open, and the first electronic expansion valve, the fifth solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are controlled to close, so as to control the refrigerant operation of the chiller unit in the chilled water circulation loop.

[0020] Furthermore, under the refrigeration-heat recovery operating condition, a corresponding control strategy is executed according to the operating condition to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit, including:

[0021] The first electronic expansion valve, the fifth solenoid valve, and the fourth solenoid valve are controlled to open, and the second electronic expansion valve, the sixth solenoid valve, the first solenoid valve, the second solenoid valve, and the third solenoid valve are controlled to close, so as to control the refrigerant operation of the chiller unit in the chilled water circulation loop.

[0022] Furthermore, under the ice storage condition, a corresponding control strategy is executed according to the operating condition to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit, including:

[0023] The second electronic expansion valve, the sixth solenoid valve, the second solenoid valve, and the third solenoid valve are controlled to open, while the first electronic expansion valve, the fifth solenoid valve, the first solenoid valve, and the fourth solenoid valve are controlled to close, thereby controlling the refrigerant circulation loop of the chiller unit.

[0024] Furthermore, under the ice storage-heat recovery operating condition, a corresponding control strategy is executed according to the operating condition to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit, including:

[0025] The first electronic expansion valve, the fifth solenoid valve, and the second solenoid valve are controlled to open, and the second electronic expansion valve, the sixth solenoid valve, the first solenoid valve, the third solenoid valve, and the fourth solenoid valve are controlled to close, so as to control the refrigerant circulation loop of the chiller unit.

[0026] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method as described above.

[0027] The present invention also provides an electronic device, comprising: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the one or more processors to perform the method as described above.

[0028] By applying the technical solution of this invention, a chiller unit structure and its control method are proposed. By switching the refrigerant circulation loop accordingly under different operating conditions, both the evaporator and condenser can provide chilled / hot water at independent temperatures, enabling the chiller unit to operate at its optimal efficiency under various operating conditions and meet the optimal efficiency requirements of various water temperature conditions. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of a chiller unit in related technologies;

[0030] Figure 2 This is a schematic diagram of the structure of a chiller unit according to an embodiment of the present invention;

[0031] Figure 3 This is a flowchart of a control method for a chiller unit according to an embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0033] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0034] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0035] It should be understood that although the terms first, second, third, etc., may be used to describe solenoid valves in the embodiments of the present invention, these solenoid valves should not be limited to these terms. These terms are only used to distinguish solenoid valves. For example, without departing from the scope of the embodiments of the present invention, a first solenoid valve may also be referred to as a second solenoid valve, and similarly, a second solenoid valve may also be referred to as a first solenoid valve.

[0036] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0037] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0038] The optional embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] Example 1

[0040] This embodiment proposes a chiller unit that can switch between different refrigerant circulation loops under different operating conditions: a chilled water circulation loop and a refrigerant circulation loop. Currently, traditional chiller units do not distinguish between chilled water and refrigerant circulation loops. Figure 1 This is a structural diagram of a chiller unit in related technologies, such as... Figure 1As shown, the compressor, condenser, and evaporator are connected in sequence, and the ice storage device is connected to the evaporator.

[0041] When the unit needs to operate under various conditions such as cooling, heat recovery, and ice storage, the refrigerant loop remains unchanged; only the water circuit is switched via a solenoid valve. The entire unit always operates in a refrigerant-water-water heat exchange process. There are two heat exchanges from the evaporator to the ice storage device: the first is within the evaporator, and the second is between the chilled water (approximately -5 degrees Celsius) exiting the evaporator and the ice storage device. Temperature loss occurs during heat recovery or ice storage operation, reducing the unit's energy efficiency.

[0042] This embodiment proposes a chiller unit that can switch between different refrigerant circulation loops under different operating conditions: chilled water circulation loop and refrigerant circulation loop. Figure 2 This is a structural schematic diagram of a chiller unit according to an embodiment of the present invention, as shown below. Figure 2 As shown, the chiller unit includes: a compressor, a condenser, and an evaporator connected in sequence, with the evaporator directly connected to the chilled water system. It also includes: an ice storage device, whose outlet pipe is connected to the compressor and whose inlet pipe is connected to the heating water tank; a first electronic expansion valve located on the pipe between the heating water tank and the ice storage device; a second electronic expansion valve located on the pipe between the condenser and the evaporator; a first solenoid valve located on the pipe between the second electronic expansion valve and the evaporator; a third solenoid valve located on a first branch, the starting point of which is located on the pipe between the second electronic expansion valve and the first solenoid valve, and the ending point on the pipe between the first electronic expansion valve and the second solenoid valve; and a fourth solenoid valve located on a second branch, the starting point of which is located on the pipe between the first electronic expansion valve and the second solenoid valve, and the ending point on the pipe between the first solenoid valve and the evaporator. The fifth solenoid valve is installed on the pipeline between the compressor and the heating water tank; the sixth solenoid valve is installed on the pipeline between the compressor and the condenser. One end of the pipeline containing the sixth solenoid valve is connected to the condenser, and the other end is connected to the pipeline between the compressor and the fifth solenoid valve.

[0043] Because the chiller unit structure in this embodiment can switch refrigerant circulation loops accordingly under different operating conditions—refrigerant circulation loop and chilled water circulation loop—the evaporator and condenser in this embodiment can have reduced capacity. For example, the evaporator can be reduced to only the evaporator of the chilled water system.

[0044] The aforementioned chiller unit may further include: a control device for confirming the operating conditions of the chiller unit; and for executing corresponding control strategies based on the operating conditions to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit. Based on this, the evaporator and condenser in this embodiment of the chiller unit can both provide chilled / hot water at independent temperatures, entering the refrigerant system of the ice storage device and the heating water tank section, which is also another form of chiller unit evaporator and condenser. Therefore, this embodiment can be understood as proposing a chiller unit structure with multiple evaporators and multiple condensers. The chiller unit in this embodiment operates at its optimal efficiency under various operating conditions, meeting the optimal efficiency requirements for various water temperature conditions.

[0045] Example 2

[0046] According to an embodiment of the present invention, a control method for a chiller unit is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0047] Figure 3 This is a flowchart of a control method for a chiller unit according to an embodiment of the present invention. This control method is applied to the chiller unit described in the above embodiments, such as... Figure 3 As shown, the method includes the following steps:

[0048] Step S301: Confirm the operating conditions of the chiller unit; the operating conditions of the chiller unit include at least: refrigeration condition, refrigeration-heat recovery condition, ice storage condition, and ice storage-heat recovery condition.

[0049] Step S302: Execute the corresponding control strategy according to the operating conditions to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit.

[0050] The chiller unit structure in this embodiment enables the refrigerant circulation loop to switch accordingly under different operating conditions. Both the evaporator and condenser can provide chilled / hot water at independent temperatures, allowing the chiller unit to operate at its optimal efficiency under various conditions and meet the optimal efficiency requirements for various water temperature conditions.

[0051] The control strategies implemented under each operating condition are described below, i.e., how to switch the refrigerant circulation loop.

[0052] (1) Cooling operation

[0053] Under cooling conditions, corresponding control strategies are executed according to the operating conditions to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit. This can be achieved through the following preferred implementation methods:

[0054] The system controls the opening of the second electronic expansion valve, the sixth solenoid valve, and the first solenoid valve, and controls the closing of the first electronic expansion valve, the fifth solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve to control the refrigerant circulation loop of the chiller unit.

[0055] Under the above control strategy, the refrigerant exits the compressor, passes through the condenser, the second electronic expansion valve, and the evaporator, and returns to the compressor. The evaporator provides the air conditioning system with conventional chilled water (e.g., 7°C chilled water), and the condenser is connected to a cooling tower for heat dissipation.

[0056] (2) Refrigeration-heat recovery operation

[0057] Under refrigeration-heat recovery operation, corresponding control strategies are executed according to the operating conditions to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit. This can be achieved through the following preferred implementation methods:

[0058] The system controls the opening of the first electronic expansion valve, the fifth solenoid valve, and the fourth solenoid valve, and controls the closing of the second electronic expansion valve, the sixth solenoid valve, the first solenoid valve, the second solenoid valve, and the third solenoid valve, in order to control the refrigerant circulation loop of the chiller unit.

[0059] Compared to conventional systems, this process eliminates the condenser heat exchange stage. The refrigerant exits the compressor and directly enters the heating water tank to provide heat for domestic hot water. It then passes through the first electronic expansion valve for throttling before reaching the evaporator and finally returning to the compressor. Because the refrigerant directly heats the domestic hot water on the condensing side, compared to the conventional "refrigerant-cooling water-domestic hot water" triple heat exchange system, the condensing temperature is reduced, and the operating efficiency of the chiller unit is improved.

[0060] (3) Ice storage operation

[0061] Under ice storage conditions, corresponding control strategies are executed according to the operating conditions to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit. This can be achieved through the following preferred implementation methods:

[0062] The system controls the opening of the second electronic expansion valve, the sixth solenoid valve, the second solenoid valve, and the third solenoid valve, and controls the closing of the first electronic expansion valve, the fifth solenoid valve, the first solenoid valve, and the fourth solenoid valve to control the refrigerant circulation loop of the chiller unit.

[0063] Compared to conventional systems, this process eliminates the evaporator heat exchange stage. The refrigerant exits the compressor, passes through the condenser and the second electronic expansion valve, and then directly enters the ice storage unit for low-temperature ice making before returning to the compressor. Because the evaporator side uses refrigerant for direct ice making, compared to the conventional "refrigerant-chilled water-ice making" triple heat exchange system, the evaporation temperature can be increased, improving the chiller unit's operating efficiency.

[0064] (4) Ice storage-heat recovery operation

[0065] Under ice storage-heat recovery operation, corresponding control strategies are executed according to the operating conditions to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit. This can be achieved through the following preferred implementation methods:

[0066] The system controls the opening of the first electronic expansion valve, the fifth solenoid valve, and the second solenoid valve, and controls the closing of the second electronic expansion valve, the sixth solenoid valve, the first solenoid valve, the third solenoid valve, and the fourth solenoid valve to control the refrigerant circulation loop of the chiller unit.

[0067] Compared to conventional systems, this process eliminates the heat exchange stages of the evaporator and condenser. The refrigerant exits the compressor and directly enters the heating water tank to provide heat for domestic hot water. It then passes through the first electronic expansion valve for throttling and directly enters the ice storage device for low-temperature ice making before finally returning to the compressor.

[0068] Example 3

[0069] This embodiment provides an electronic device for a control method of a chiller unit. The electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein...

[0070] The memory stores instructions that can be executed by the at least one processor. These instructions are executed by the at least one processor to enable the at least one processor to: determine the operating conditions of the chiller unit; the operating conditions of the chiller unit include at least: refrigeration condition, refrigeration-heat recovery condition, ice storage condition, and ice storage-heat recovery condition; and execute corresponding control strategies based on the operating conditions to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit.

[0071] Example 4

[0072] This invention provides software for executing the technical solutions described in the above embodiments and preferred embodiments.

[0073] This invention provides a non-volatile computer storage medium storing computer-executable instructions that can execute the control method of the chiller unit in any of the above method embodiments.

[0074] The aforementioned storage medium stores the aforementioned software, and the storage medium includes, but is not limited to, optical discs, floppy disks, hard disks, and rewritable memory.

[0075] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0076] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0077] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0078] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0079] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0080] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0081] The above-described product can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0082] The electronic devices of this invention exist in various forms, including but not limited to:

[0083] (1) Mobile communication devices: These devices are characterized by their mobile communication capabilities and primarily aim to provide voice and data communication. These terminals include: smartphones (e.g., iPhones), multimedia phones, feature phones, and low-end phones, etc.

[0084] (2) Ultra-mobile personal computer devices: These devices fall under the category of personal computers, possessing computing and processing capabilities, and generally also have mobile internet access features. These terminals include PDAs, MIDs, and UMPCs, such as the iPad.

[0085] (3) Portable entertainment devices: These devices can display and play multimedia content. This category includes audio and video players (such as iPods), handheld game consoles, e-book readers, as well as smart toys and portable car navigation devices.

[0086] (4) Server: A device that provides computing services. The components of a server include a processor, hard disk, memory, device bus, etc. Servers are similar to general computer architectures, but because they need to provide highly reliable services, they have higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0087] (5) Other electronic devices with data interaction functions, such as televisions and in-vehicle screens.

[0088] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water chiller unit, characterized in that, The chiller unit includes: a compressor, a condenser, and an evaporator connected in sequence, wherein the evaporator is directly connected to the chilled water system, and further includes: An ice storage device, whose outlet pipe is connected to a compressor and whose inlet pipe is connected to a heating water tank; A first electronic expansion valve is installed on the pipeline between the heating water tank and the ice storage device; A second electronic expansion valve is installed on the pipeline between the condenser and the evaporator; A first solenoid valve is installed on the pipeline between the second electronic expansion valve and the evaporator; The second solenoid valve is installed on the pipeline between the first electronic expansion valve and the ice storage device; The third solenoid valve is installed on the first branch, the starting point of the first branch is located on the pipeline between the second electronic expansion valve and the first solenoid valve, and the ending point is located on the pipeline between the first electronic expansion valve and the second solenoid valve. The fourth solenoid valve is installed on the second branch, the starting point of which is located on the pipeline between the first electronic expansion valve and the second solenoid valve, and the ending point is located on the pipeline between the first solenoid valve and the evaporator.

2. The chiller unit according to claim 1, characterized in that, The chiller unit includes: The fifth solenoid valve is installed on the pipeline between the compressor and the heating water tank; The sixth solenoid valve is installed on the pipeline between the compressor and the condenser. One end of the pipeline containing the sixth solenoid valve is connected to the condenser, and the other end is connected to the pipeline between the compressor and the fifth solenoid valve.

3. A control method for a chiller unit, applied to the chiller unit as described in claim 1 or 2, characterized in that, The method includes: Confirm the operating status of the chiller unit; According to the operating conditions, the corresponding control strategy is executed to control the refrigerant circulation loop or the chilled water circulation loop of the chiller unit.

4. The method according to claim 3, characterized in that, The operating conditions of the chiller unit include at least: refrigeration mode, refrigeration-heat recovery mode, ice storage mode, and ice storage-heat recovery mode.

5. The method according to claim 4, characterized in that, Under the refrigeration condition, a corresponding control strategy is executed according to the operating condition to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit, including: The second electronic expansion valve, the sixth solenoid valve, and the first solenoid valve are controlled to open, and the first electronic expansion valve, the fifth solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are controlled to close, so as to control the refrigerant operation of the chiller unit in the chilled water circulation loop.

6. The method according to claim 4, characterized in that, Under the refrigeration-heat recovery operating condition, a corresponding control strategy is executed according to the operating condition to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit, including: The first electronic expansion valve, the fifth solenoid valve, and the fourth solenoid valve are controlled to open, and the second electronic expansion valve, the sixth solenoid valve, the first solenoid valve, the second solenoid valve, and the third solenoid valve are controlled to close, so as to control the refrigerant operation of the chiller unit in the chilled water circulation loop.

7. The method according to claim 4, characterized in that, Under the ice storage condition, a corresponding control strategy is executed according to the operating condition to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit, including: The second electronic expansion valve, the sixth solenoid valve, the second solenoid valve, and the third solenoid valve are controlled to open, while the first electronic expansion valve, the fifth solenoid valve, the first solenoid valve, and the fourth solenoid valve are controlled to close, thereby controlling the refrigerant circulation loop of the chiller unit.

8. The method according to claim 4, characterized in that, Under the ice storage-heat recovery operating condition, a corresponding control strategy is executed according to the operating condition to control the refrigerant circulation loop or chilled water circulation loop of the chiller unit, including: The first electronic expansion valve, the fifth solenoid valve, and the second solenoid valve are controlled to open, and the second electronic expansion valve, the sixth solenoid valve, the first solenoid valve, the third solenoid valve, and the fourth solenoid valve are controlled to close, so as to control the refrigerant circulation loop of the chiller unit.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 3 to 8.

10. An electronic device, characterized in that, include: One or more processors; A storage device for storing one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the method as described in any one of claims 3 to 8.

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