Server rack cooling system, control methods and computer room

Abstract

The present invention provides a cabinet refrigeration system, a control method and a computer room, which relate to the technical field of refrigeration systems. The device includes a refrigeration unit and a heat exchange unit, wherein the heat exchange unit is provided with an air outlet and an air inlet; the air outlet and the air inlet of the heat exchange unit are both connected to the cabinet through a pipe, forming an air circulation pipeline from the air outlet of the heat exchange unit through the cabinet to the air inlet of the heat exchange unit; the refrigeration end of the refrigeration unit is connected to the heat exchange unit, and is used to cool the air passing through the air circulation pipeline. Through this application, it is helpful to solve the technical problem that the existing refrigeration method has low refrigeration efficiency for servers in the cabinet when the computer room space is large.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration systems, and in particular to a cabinet refrigeration system, a control method and a machine room. Background Art

[0002] In recent years, with the rapid development of information technology industries such as the Internet, the construction speed of data centers, as key infrastructure, has also accelerated year by year. The country has also put forward new energy-saving and environmental protection requirements for their construction and development. In the total energy consumption of data centers, excluding the energy consumption of IT equipment itself, the energy consumption of the refrigeration system accounts for the largest proportion.

[0003] Existing data center computer rooms generally use centralized cooling, that is, multiple server cabinets are installed in the computer room, and multiple heat exchangers are installed outside the cabinets. The refrigeration unit cools the air in the entire computer room, thereby achieving cooling of the server cabinets.

[0004] However, this cooling method has low cooling efficiency for servers in the cabinet when the computer room space is large. It takes a long cooling time to reduce the air temperature in the cabinet to the target value, the cooling response speed is very slow, and the energy consumption is also high. Summary of the invention

[0005] The purpose of the present invention is to provide a cabinet refrigeration system, a control method and a computer room to solve the technical problem that the existing refrigeration method has low refrigeration efficiency for servers in the cabinet when the computer room space is large. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a cabinet refrigeration system, comprising a refrigeration unit and a heat exchange unit, wherein:

[0008] The heat exchange unit is provided with an air outlet and an air inlet;

[0009] The air outlet and the air inlet of the heat exchange unit are connected to the cabinet through pipes, forming an air circulation pipeline from the air outlet of the heat exchange unit through the cabinet to the air inlet of the heat exchange unit;

[0010] The refrigeration end of the refrigeration unit is connected to the heat exchange unit and is used to cool the air passing through the air circulation pipeline.

[0011] Optionally, the refrigeration unit includes a compressor and a fluorine pump, the refrigeration end of the refrigeration unit, the compressor and the heating end of the refrigeration unit are connected in series through pipelines to form a compressor circulation flow path, and the refrigeration end, the heating end and the fluorine pump are connected in series through pipelines to form a fluorine pump circulation flow path.

[0012] Optionally, the compressor is a variable frequency compressor.

[0013] Optionally, the refrigeration unit further comprises a phase-change cold storage module for reducing the temperature of the refrigerant, and the phase-change cold storage module is connected to a common pipeline of the compressor circulation flow path and the fluorine pump circulation flow path.

[0014] Optionally, a first valve body and an electronic expansion valve are provided on the compressor circulation flow path;

[0015] A second valve body is arranged on the fluorine pump circulation flow path.

[0016] Optionally, the refrigeration end is a direct expansion evaporator.

[0017] Optionally, the heat exchange unit includes a fan device, and the fan device is arranged on the air circulation pipeline; the air circulation pipeline includes an air inlet duct and an air outlet duct, and the air inlet duct and the air outlet duct are both provided with a thermal insulation air valve.

[0018] Optionally, the heat exchange unit includes a dehumidification device and a purification device, and the dehumidification device and the purification device are both arranged on the air circulation pipeline.

[0019] A computer room provided by the present invention comprises at least one cabinet and a cabinet refrigeration system, wherein the cabinet comprises an air inlet and an air outlet, the air inlet of the cabinet is connected to the air outlet of the heat exchange unit through a pipe, and the air outlet of the cabinet is connected to the air inlet of the heat exchange unit through a pipe.

[0020] The present invention provides a control method for a cabinet refrigeration system.

[0021] Get temperature information outside the cabinet;

[0022] If the temperature outside the cabinet is greater than a first preset value, opening the compressor circulation flow path and controlling the compressor to operate at a highest frequency;

[0023] If the temperature outside the cabinet is lower than the first preset value but higher than the second preset value, the compressor circulation flow path and the fluorine pump circulation flow path are opened, and the compressor is controlled to operate at the lowest frequency, and the fluorine pump is controlled to start;

[0024] Wherein, the first preset value is greater than the second preset value.

[0025] Optionally, opening the compressor circulation flow path includes:

[0026] The first valve body is opened, and the second valve body and the fluorine pump are closed, so that the refrigerant circulates along the refrigeration end of the refrigeration unit, the compressor, the heating end of the refrigeration unit and the electronic expansion valve in sequence.

[0027] Optionally, the opening of the compressor circulation flow path and the fluorine pump circulation flow path comprises:

[0028] The first valve body and the second valve body are opened to allow the refrigerant to circulate in the refrigeration end of the refrigeration unit, the compressor, the heating end of the refrigeration unit, the electronic expansion valve and the fluorine pump.

[0029] Optionally, the method further comprises:

[0030] If the temperature outside the cabinet is lower than the second preset value, the fluorine pump circulation path is opened, and the fluorine pump is controlled to start.

[0031] Optionally, opening the fluorine pump circulation flow path includes:

[0032] The second valve body is opened, and the compressor and the first valve body are closed, so that the refrigerant circulates along the refrigeration end, the heating end and the fluorine pump in sequence.

[0033] Optionally, the method further includes: if the temperature outside the cabinet is greater than the first preset value, starting a phase change cold storage module provided on the refrigeration unit.

[0034] Optionally, the method further comprises: if the temperature outside the cabinet is less than the second preset value but greater than a third preset value, controlling the phase change cold storage module provided on the refrigeration unit to start;

[0035] Wherein, the second preset value is greater than the third preset value.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention provides a cabinet cooling system, in which the air outlet and air inlet of the heat exchanger unit are connected to the server cabinet through pipes, forming an air circulation pipeline from the air outlet of the heat exchanger unit through the server cabinet to the air inlet of the heat exchanger unit; at the same time, the refrigeration end of the refrigeration unit is connected to the heat exchanger unit for cooling the air passing through the air circulation pipeline, and then the cold air in the air circulation pipeline can directly enter the server cabinet, thereby directly cooling the server cabinet without cooling the entire computer room, greatly reducing the required cooling capacity and air volume, thereby greatly improving the cooling efficiency of the server cabinet, improving the cooling response speed, reducing energy consumption, and the scheme has a lower wet heat load and a lower initial equipment investment cost; because the server cabinet itself is sealed, the air in the air circulation pipeline forms a self-circulation, which is independent of the environment outside the server cabinet, so that maintenance personnel can easily maintain and repair the equipment, and solve the technical problem that the existing refrigeration method has low cooling efficiency for the server in the cabinet when the computer room space is large.

[0038] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 is a simplified structural principle diagram of a cabinet refrigeration system according to an exemplary embodiment;

[0041] Figure 2 is a flow chart of a method for controlling a cabinet refrigeration system provided in Embodiment 3 of the present invention;

[0042] Figure 3 is a flow chart of a method for controlling a cabinet refrigeration system provided in Embodiment 4 of the present invention;

[0043] In the figure, 1, refrigeration unit; 11, compressor; 12, fluorine pump; 13, phase change cold storage module; 14, first valve body; 15, second valve body; 16, electronic expansion valve; 17, cooling end; 18, heating end; 2, heat exchange unit; 21, fan equipment; 22, dehumidification equipment; 23, purification equipment; 3, cabinet; 4, air inlet duct; 5, air outlet duct; 10, compressor circulation flow path; 20, fluorine pump circulation flow path. DETAILED DESCRIPTION

[0044] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the invention described in the claims. In addition, the entire contents of the configurations shown in the following embodiments are not limited to the solutions required as the invention described in the claims.

[0048] The technical solution of the present invention is described in detail below in conjunction with specific embodiments.

[0049] Embodiment 1:

[0050] See also Figure 1The present invention provides a cabinet refrigeration system, including a refrigeration unit 1 and a heat exchange unit 2, wherein the heat exchange unit 2 is provided with an air outlet and an air inlet; the air outlet and the air inlet of the heat exchange unit 2 are connected to the cabinet 3 through a pipeline, forming an air circulation pipeline from the air outlet of the heat exchange unit 2 through the cabinet 3 to the air inlet of the heat exchange unit 2, and the heat exchange unit 2 is located on the outside of the cabinet 3, so that the cold air in the heat exchange unit 2 needs to slow down in the pipeline for a certain time when entering the cabinet 3, which provides a buffer time for the adjustment of the heat exchange unit 2, reduces the excessively fast rate of change of the air temperature in the cabinet 3, and thus reduces the cabinet 3 to avoid condensation in the cabinet, thereby avoiding damage to electronic components; the cooling end 17 of the refrigeration unit 1 is connected to the heat exchange unit 2 to cool the air passing through the air circulation pipeline, that is, the refrigerant in the cooling end 17 can absorb the heat of the air passing through the air circulation pipeline in the heat exchange unit 2, thereby cooling the air in the air circulation pipeline, and then the cold air will flow from the air outlet of the heat exchange unit 2 and along the pipeline to the cabinet 3, and take away the heat in the cabinet 3 to form hot air, and the hot air will enter the heat exchange unit 2 from the air inlet along the pipeline into the heat exchange unit 2, and be cooled again, thereby realizing circulating flow refrigeration. The cabinet 3 can be a server cabinet. The present invention directly cools the air in the server cabinet without cooling the entire computer room, which greatly reduces the required cooling capacity and air volume, thereby greatly improving the cooling efficiency of the server cabinet, improving the cooling response speed, and reducing energy consumption. The scheme has lower wet heat load and lower initial equipment investment cost. Since the server cabinet itself is sealed, the air in the air circulation pipeline forms a self-circulation, which is independent of the environment outside the server cabinet, making it convenient for maintenance personnel to maintain and repair the equipment, and solving the technical problem of low cooling efficiency of the existing refrigeration method for the server in the cabinet when the computer room space is large.

[0051] As an optional embodiment, the refrigeration unit 1 includes a compressor 11 and a fluorine pump 12. The refrigeration end 17 of the refrigeration unit 1, the compressor 11 and the heating end 18 of the refrigeration unit 1 are connected in series through pipelines to form a compressor circulation flow path 10. The refrigeration end 17, the heating end 18 and the fluorine pump 12 are connected in series through pipelines to form a fluorine pump circulation flow path 20. The compressor 11 and the fluorine pump 12 are on two branch pipes, but they are all connected to the same refrigeration end 17 and the heating end 18. The compressor circulation flow path 10 can start the compressor refrigeration mode, and the fluorine pump circulation flow path 20 can start the fluorine pump natural cooling mode. According to the outdoor temperature, the compressor refrigeration mode can be selected to start, or the fluorine pump natural cooling mode can be turned on, or both the compressor refrigeration mode and the fluorine pump natural cooling mode can be turned on, which can make full use of the natural cold source and greatly reduce energy consumption.

[0052] As an optional implementation, the compressor 11 can be a variable frequency compressor. According to the temperature information outside the cabinet 3, the compressor 11 can be controlled to operate at the highest frequency, or the compressor 11 can be controlled to operate at the lowest frequency, or the compressor 11 can be controlled not to operate, so as to make full use of the natural cold source and greatly reduce energy consumption.

[0053] As an optional implementation, the refrigeration unit 1 also includes a phase change cold storage module 13 for reducing the temperature of the refrigerant. The phase change cold storage module 13 is connected to the common pipeline of the compressor circulation flow path 10 and the fluorine pump circulation flow path 20, which can play an energy-saving role.

[0054] As an optional embodiment, the compressor circulation flow path 10 is provided with a first valve body 14 and an electronic expansion valve 16, and the first valve body 14 is used to control the on-off of the compressor circulation flow path 10; the fluorine pump circulation flow path 20 is provided with a second valve body 15, and the second valve body 15 is used to control the on-off of the fluorine pump circulation flow path 20. The specific distribution of the parts of the refrigeration unit 1, the compressor circulation flow path 10: the refrigeration end 17, the first valve body 14, the compressor 11, the heating end 18, the electronic expansion valve 16 and the phase change cold storage module 13 are circulated and connected in sequence through pipelines, and the fluorine pump circulation flow path 20: the refrigeration end 17, the second valve body 15, the heating end 18, the fluorine pump 12 and the phase change cold storage module 13 are circulated and connected in sequence through pipelines, wherein the first valve body 14 and the compressor 11 are both distributed in parallel with the second valve body 15 between the outlet of the refrigeration end 17 and the inlet of the heating end 18, and the electronic expansion valve 16 and the fluorine pump 12 are distributed in parallel between the outlet of the heating end 18 and the inlet of the refrigeration end 17.

[0055] As an optional implementation, the cooling end 17 may be a direct expansion evaporator, and the heating end 18 may be a condenser.

[0056] As an optional implementation, the heat exchange unit 2 includes a fan device 21, which is arranged on the air circulation pipeline. The fan device 21 can drive the air circulation in the air circulation pipeline to circulate, thereby allowing the air to circulate between the heat exchange unit 2 and the cabinet 3; the air circulation pipeline includes an air inlet duct 4 and an air outlet duct 5, and the air inlet duct 4 and the air outlet duct 5 are both provided with a heat preservation air valve. When the components in the cabinet 3 need to be repaired and maintained, the heat preservation air valve can be closed, and the cabinet 3 can be sealed with low-humidity clean cold air, and the cabinet 3 can be transported to the maintenance room for maintenance. During the whole process, the cabinet 3 is isolated from the outside.

[0057] As an optional implementation, the heat exchange unit 2 includes a dehumidifier 22 and a purifier 23, both of which are arranged on the air circulation pipeline, the dehumidifier 22 is used to reduce the humidity of the air in the air circulation pipeline, and the purifier 23 is used to purify the air in the air circulation pipeline. The air in the air circulation pipeline does not pass through the space outside the cabinet 3 and the space inside the machine room, so even if someone enters and leaves the machine room, the moisture content and cleanliness of the air in the cabinet 3 can still be guaranteed to remain unchanged, which greatly increases safety, reduces the operating costs of the dehumidifier 22 and the purifier 23, and extends the service life. After the first installation of the present invention, the air in the cabinet 3 does not meet the humidity and cleanliness requirements, so the dehumidifier 22 and the purifier 23 are mainly used in the first operation after the installation is completed, or in the subsequent use process, when the wind side channel fails and leaks, it is used as a backup.

[0058] Embodiment 2:

[0059] The present invention provides a machine room, including at least one cabinet 3 and a cabinet refrigeration system, the cabinet 3 including an air inlet and an air outlet, the air inlet of the cabinet 3 is connected to the air outlet of the heat exchange unit 2 through an air inlet duct 4, and the air outlet of the cabinet 3 is connected to the air inlet of the heat exchange unit 2 through an air outlet duct 5. The air inlet duct 4 is provided with a plurality of air inlet branches corresponding to the number of the cabinets 3, each of which is connected to the air inlet of one cabinet 3, and the air outlet duct 5 is provided with a plurality of air outlet branches corresponding to the number of the cabinets 3, each of which is connected to the air outlet of one cabinet 3.

[0060] Embodiment 3:

[0061] See also Figure 2 The present invention provides a control method for a cabinet refrigeration system.

[0062] Step S01: obtaining temperature information outside the cabinet 3, that is, the temperature information outside the cabinet 3 can be detected by a temperature detector, and then the obtained temperature information is compared with a preset value, thereby controlling the startup mode of the cabinet refrigeration system;

[0063] Step S02: If the temperature outside the cabinet 3 is greater than the first preset value, the compressor circulation flow path 10 is turned on, and the compressor 11 is controlled to work at the highest frequency, that is, at this time, the cabinet refrigeration system will run the compressor refrigeration mode, wherein the first preset value can range from 23°C to 27°C, and the first preset value is preferably 25°C. At this time, the temperature outside the cabinet 3 is mostly concentrated in summer, and the temperature is high. It cannot be cooled naturally in the external environment, and can only rely on the compressor 11 to work at the highest frequency, so that the refrigerant in the compressor circulation flow path 10 can reduce the temperature, thereby preventing it from affecting the refrigeration efficiency in the air circulation pipeline;

[0064] Step S03: If the temperature outside the cabinet 3 is less than the first preset value but greater than the second preset value, the compressor circulation path 10 and the fluorine pump circulation path 20 are opened, and the compressor 11 is controlled to work at the lowest frequency, and the fluorine pump 12 is controlled to start. At this time, the cabinet refrigeration system will run the fluorine pump natural cooling mode, and will also run the compressor refrigeration mode. Among them, the second preset value can range from 8°C to 12°C, and the second preset value is preferably 10°C. At this time, the temperature outside the cabinet 3 is mostly concentrated in spring and autumn. Although it can be naturally cooled in the external environment by starting the fluorine pump 12, it does not meet the demand for refrigerant refrigeration. It is necessary to rely on the compressor 11 to work at the lowest frequency to increase the cooling capacity, that is, to utilize the external environment, and at the same time reduce the power consumption of the compressor 11.

[0065] As an optional embodiment, opening the compressor circulation flow path 10 includes:

[0066] The first valve body 14 is opened, and the second valve body 15 and the fluorine pump 12 are closed, so that the refrigerant circulates along the cooling end 17 of the refrigeration unit 1, the compressor 11, the heating end 18 of the refrigeration unit 1 and the electronic expansion valve 16 in sequence.

[0067] As an optional embodiment, opening the compressor circulation flow path 10 and the fluorine pump circulation flow path 20 includes:

[0068] The first valve body 14 and the second valve body 15 are opened to allow the refrigerant to circulate in the cooling end 17 of the refrigeration unit 1 , the compressor 11 , the heating end 18 of the refrigeration unit 1 , the electronic expansion valve 16 and the fluorine pump 12 .

[0069] As an optional implementation, the method further includes:

[0070] Step S04: If the temperature outside the cabinet 3 is lower than the second preset value, the fluorine pump circulation path 20 is opened, and the fluorine pump 12 is controlled to start. At this time, the cabinet refrigeration system will run the fluorine pump natural cooling mode. At this time, the external environment meets the refrigerant refrigeration requirements. It is only necessary to start the fluorine pump 12. The refrigerant in the fluorine pump circulation path 20 can be naturally cooled from the external environment. There is no need to start the compressor 11, thereby saving energy consumption.

[0071] As an optional embodiment, opening the fluorine pump circulation flow path 20 includes:

[0072] The second valve body 15 is opened, and the compressor 11 and the first valve body 14 are closed, so that the refrigerant circulates along the cooling end 17, the heating end 18 and the fluorine pump 12 in sequence.

[0073] Embodiment 4:

[0074] The difference between this embodiment 4 and embodiment 3 is that: Figure 3The method also includes: step S05: if the temperature outside the cabinet 3 is greater than the first preset value, the phase change cold storage module 13 set on the refrigeration unit 1 is started. At this time, when the external ambient temperature is too high, the compressor 11 working at the highest frequency cannot meet the refrigerant refrigeration needs. The phase change cold storage module 13 can increase the cooling capacity of the refrigerant, thereby reducing the temperature of the refrigerant.

[0075] As an optional implementation, the method further includes: step S041: if the temperature outside the cabinet 3 is less than the second preset value but greater than the third preset value, the phase change cold storage module 13 provided on the refrigeration unit 1 is controlled to start. At this time, it is concentrated in the transition season, and the temperature difference between day and night is relatively large. In order to avoid starting the compressor 11 to increase energy consumption, the phase change cold storage module 13 can increase the cooling capacity of the refrigerant, thereby reducing the temperature of the refrigerant;

[0076] Step S042: If the temperature outside the cabinet 3 is less than the third preset value, the fluorine pump circulation path 20 is opened, and the fluorine pump 12 is controlled to start. At this time, the cabinet refrigeration system will run the fluorine pump natural cooling mode; wherein, the third preset value range can be -7°C to -3°C, and the third preset value is preferably -5°C. At this time, the temperature outside the cabinet 3 is mostly concentrated in winter, and the fluorine pump 12 can be started to cool naturally in the external environment, without starting the compressor 11, thereby saving energy consumption.

[0077] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0078] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" and "multiple" refers to at least two.

[0079] It should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. In addition, the "connection" used here may include wireless connection; the wording "and / or" used includes any unit and all combinations of one or more associated listed items.

[0080] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0081] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0082] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0083] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0084] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A control method for a cabinet refrigeration system, characterized in that: The cabinet refrigeration system comprises a refrigeration unit (1) and a heat exchange unit (2), wherein: The heat exchange unit (2) is provided with an air outlet and an air inlet; The air outlet and the air inlet of the heat exchange unit (2) are connected to the cabinet (3) through pipes, forming an air circulation pipeline from the air outlet of the heat exchange unit (2) through the cabinet (3) to the air inlet of the heat exchange unit (2); The refrigeration end (17) of the refrigeration unit (1) is connected to the heat exchange unit (2) and is used to cool the air passing through the air circulation pipeline; The heat exchange unit (2) comprises a dehumidification device (22) and a purification device (23), and the dehumidification device (22) and the purification device (23) are both arranged on the air circulation pipeline; The refrigeration unit (1) comprises a compressor (11) and a fluorine pump (12); a refrigeration end (17) of the refrigeration unit (1), the compressor (11) and a heating end (18) of the refrigeration unit (1) are connected in series via a pipeline to form a compressor circulation flow path (10); and the refrigeration end (17), the heating end (18) and the fluorine pump (12) are connected in series via a pipeline to form a fluorine pump circulation flow path (20); The refrigeration unit (1) further comprises a phase-change cold storage module (13) for reducing the temperature of the refrigerant, wherein the phase-change cold storage module (13) is connected to a common pipeline of the compressor circulation flow path (10) and the fluorine pump circulation flow path (20); The control method comprises obtaining temperature information outside the cabinet (3); If the temperature outside the cabinet (3) is greater than a first preset value, the compressor circulation flow path (10) is opened, the compressor (11) is controlled to operate at a maximum frequency, and the phase change cold storage module (13) provided on the refrigeration unit (1) is started; If the temperature outside the cabinet (3) is lower than the first preset value but higher than the second preset value, the compressor circulation flow path (10) and the fluorine pump circulation flow path (20) are opened, the compressor (11) is controlled to operate at the lowest frequency, and the fluorine pump (12) is controlled to start; Wherein, the first preset value is greater than the second preset value; The method further comprises: if the temperature outside the cabinet (3) is less than the second preset value but greater than a third preset value, controlling the phase change cold storage module (13) provided on the refrigeration unit (1) to start; Wherein, the second preset value is greater than the third preset value.

2. The control method according to claim 1, characterized in that: The compressor (11) is a variable frequency compressor.

3. The control method according to claim 1, characterized in that: The compressor circulation flow path (10) is provided with a first valve body (14) and an electronic expansion valve (16); A second valve body (15) is provided on the fluorine pump circulation flow path (20).

4. The control method according to claim 1, characterized in that: The refrigeration end (17) is a direct expansion evaporator.

5. The control method according to claim 1, characterized in that: The heat exchange unit (2) comprises a fan device (21), and the fan device (21) is arranged on the air circulation pipeline; the air circulation pipeline comprises an air inlet duct (4) and an air outlet duct (5), and both the air inlet duct (4) and the air outlet duct (5) are provided with a heat preservation air valve.

6. The control method according to claim 1, characterized in that: The opening of the compressor circulation flow path (10) comprises: The first valve body (14) is opened, and the second valve body (15) and the fluorine pump (12) are closed, so that the refrigerant circulates along the refrigeration end (17) of the refrigeration unit (1), the compressor (11), the heating end (18) of the refrigeration unit (1), and the electronic expansion valve (16) in sequence.

7. The control method according to any one of claims 1 or 6, characterized in that: The opening of the compressor circulation flow path (10) and the fluorine pump circulation flow path (20) comprises: The first valve body (14) and the second valve body (15) are opened to allow the refrigerant to circulate in the refrigeration end (17) of the refrigeration unit (1), the compressor (11), the heating end (18) of the refrigeration unit (1), the electronic expansion valve (16) and the fluorine pump (12).

8. The control method according to claim 1, characterized in that: The method further includes: If the temperature outside the cabinet (3) is lower than the second preset value, the fluorine pump circulation flow path (20) is opened, and the fluorine pump (12) is controlled to start.

9. The control method according to claim 8, characterized in that: The step of opening the fluorine pump circulation flow path (20) comprises: The second valve body (15) is opened, and the compressor (11) and the first valve body (14) are closed, so that the refrigerant circulates along the refrigeration end (17), the heating end (18) and the fluorine pump (12) in sequence.

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