Refrigeration system, refrigeration equipment, method and device for controlling refrigeration system and computer readable storage medium

Abstract

The invention discloses a refrigerating system, which comprises a refrigerant circulation loop, a refrigerant circulation loop, a refrigerant circulation loop, a refrigerant circulation loop, a refrigerant circulation loop, a refrigerant circulation loop and a refrigerant circulation loop, the first end of the first refrigerant branch is connected between an outlet of the compressor and an inlet of the condenser, and the second end of the first refrigerant branch is connected between an outlet of the condenser and an inlet of the first evaporator; the second refrigerant branch comprises a second evaporator, the air inlet side of the second evaporator corresponds to the air outlet side of the first evaporator, an inlet of the second evaporator communicates with the first refrigerant branch, and an outlet of the second evaporator is connected between an outlet of the first evaporator and an inlet of the compressor; the refrigerant processing device is connected between the outlet of the second evaporator and the inlet of the compressor and is used for processing the received refrigerant into a state that the refrigerant can be conveyed to the compressor; and the first refrigerant branch can be controlled to be switched on or switched off in a segmented mode. The invention further discloses the refrigeration equipment, a method and device for controlling the refrigeration system and a computer readable storage medium.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, for example, to a refrigeration system, a refrigeration device, a method and device for controlling a refrigeration system, and a computer-readable storage medium. Background Art

[0002] In order to improve the uniformity of the temperature inside the refrigerator, the evaporator fan is often controlled to run normally in the currently commonly used medical refrigerator products. Therefore, when the compressor stops, the evaporator fan will take out the moisture on the surface of the evaporator, which will lead to high humidity inside the refrigerator. High humidity inside the refrigerator can easily wet the stored medicine boxes.

[0003] The related technology mainly controls the temperature inside the box, which may cause the humidity inside the box to be uncontrollable or the control accuracy to be low.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] Embodiments of the present disclosure provide a refrigeration system, a refrigeration appliance, a method and apparatus for controlling a refrigeration system, and a computer-readable storage medium to improve the control accuracy of temperature and humidity.

[0007] In some embodiments, the refrigeration system includes: a refrigerant circulation loop, including: a connected compressor, a condenser, a first throttling device and a first evaporator; a first refrigerant branch, a first end of which is connected between the outlet of the compressor and the inlet of the condenser, and a second end of which is connected between the outlet of the condenser and the inlet of the first evaporator; a second refrigerant branch, including: a second evaporator, an air inlet side of the second evaporator is arranged corresponding to an air outlet side of the first evaporator, and the inlet is connected to the first refrigerant branch, and the outlet is connected between the outlet of the first evaporator and the inlet of the compressor; a refrigerant treatment device, connected between the outlet of the second evaporator and the inlet of the compressor, for processing the received refrigerant into a state that can be transported to the compressor; wherein the first refrigerant branch can be controlled to be opened or closed in sections to switch the position where the inlet of the second evaporator is connected to the refrigerant circulation loop through the first refrigerant branch.

[0008] In some embodiments, the refrigeration equipment includes the aforementioned refrigeration system.

[0009] In some embodiments, the method for controlling the refrigeration system is applied to the aforementioned refrigeration system, and the method includes: obtaining the target humidity, and determining the refrigeration evaporator and the thermal compensation evaporator in the first evaporator and the second evaporator; according to the target humidity, controlling the position of the inlet of the thermal compensation evaporator connected to the refrigerant circulation loop.

[0010] In some embodiments, the device for controlling a refrigeration system includes: a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned method for controlling a refrigeration system when running the program instructions.

[0011] In some embodiments, the computer-readable storage medium stores program instructions, and when the program instructions are run, the aforementioned method for controlling a refrigeration system is executed.

[0012] The refrigeration system, refrigeration equipment, method and device for controlling a refrigeration system, and computer-readable storage medium provided in the embodiments of the present disclosure can achieve the following technical effects:

[0013] The first refrigerant branch is arranged in parallel with the pipeline part where the condenser is located, and the second refrigerant branch includes a second evaporator. The inlet of the second evaporator is connected to different positions of the refrigerant circulation loop through the first refrigerant branch. The second evaporator is used as a heat compensation evaporator. When the access position of the inlet of the second evaporator is different, the temperature of the refrigerant flowing into the second evaporator is different, and then the second evaporator The heat compensation of the low-temperature air after refrigeration by the first evaporator is also different. In this way, it is possible to achieve different degrees of adjustment of the temperature and humidity of the return air, thereby improving the control accuracy of the temperature and humidity of the refrigerated space.

[0014] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0016] Figure 1 is a schematic diagram of a refrigeration system provided by an embodiment of the present disclosure;

[0017] Figure 2 is a schematic diagram of the refrigerant flow direction when a refrigeration system according to an embodiment of the present disclosure operates in a refrigeration mode;

[0018] Figure 3 is a schematic diagram of the refrigerant flow direction when a refrigeration system according to an embodiment of the present disclosure operates in a first humidity control mode;

[0019] Figure 4 is a schematic diagram of the refrigerant flow direction when a refrigeration system according to an embodiment of the present disclosure operates in a second humidity control mode;

[0020] Figure 5 is a schematic diagram of the positions of a first temperature and humidity sensor and a second temperature and humidity sensor in a refrigeration system provided by an embodiment of the present disclosure;

[0021] Figure 6 is a schematic diagram of the refrigerant flow direction when the refrigeration system provided by the embodiment of the present disclosure operates in a dehumidification mode;

[0022] Figure 7 is a schematic diagram of another refrigeration system provided by an embodiment of the present disclosure;

[0023] Figure 8 is a schematic diagram of another refrigeration system provided by an embodiment of the present disclosure;

[0024] Fig. 9 is a schematic diagram of another refrigeration system provided by an embodiment of the present disclosure;

[0025] Fig.10 is a schematic diagram of refrigerant flow direction when another refrigeration system provided by an embodiment of the present disclosure operates in a refrigeration mode;

[0026] Fig.11 is a schematic diagram of the refrigerant flow direction when another refrigeration system provided by an embodiment of the present disclosure operates in a first humidity adjustment mode;

[0027] Fig.12 is a schematic diagram of the refrigerant flow direction when another refrigeration system provided by an embodiment of the present disclosure operates in a second humidity control mode;

[0028] Fig.13 is a schematic diagram of a refrigeration device provided by an embodiment of the present disclosure;

[0029] Fig.14 is a schematic diagram of a method for controlling a refrigeration system provided by an embodiment of the present disclosure;

[0030] Fig.15 is a schematic diagram of another method for controlling a refrigeration system provided by an embodiment of the present disclosure;

[0031] Fig.16 is a schematic diagram of another method for controlling a refrigeration system provided by an embodiment of the present disclosure;

[0032] Fig.17 is a schematic diagram of another method for controlling a refrigeration system provided by an embodiment of the present disclosure;

[0033] Fig.18is a schematic diagram of another method for controlling a refrigeration system provided by an embodiment of the present disclosure;

[0034] Fig.19 is a schematic diagram of a device for controlling a refrigeration system provided by an embodiment of the present disclosure;

[0035] Fig. 20 is a schematic diagram of another device for controlling a refrigeration system provided by an embodiment of the present disclosure.

[0036] Reference numerals:

[0037] 1. Refrigeration system; 10. Compressor; 11. Air inlet of compressor; 12. Process port of compressor; 20. Condenser; 30. First evaporator; 40. Second refrigerant branch; 41. Second evaporator; 42. Refrigerant pipe; 50. Fan; 60. First refrigerant branch; 61. First pipe section; 62. Second pipe section; 70. Filter; 80. First throttling device; 90. First temperature and humidity sensor; 100. Second temperature and humidity sensor; 110. Defrost branch; 120. Refrigerant treatment device; 121. Gas-liquid separator; 122. Inlet of gas-liquid separator; 123. Gas outlet of gas-liquid separator; 124. Oil return port of gas-liquid separator; 125. Second throttling device; 126. Shell and tube heat exchanger; 127. Return air pipe; 130. Third refrigerant branch; 140. Fourth refrigerant branch; 150. Third throttling device;

[0038] 2. Refrigeration equipment;

[0039] 190. Device for controlling a refrigeration system; 191. Acquisition module; 192. Control module;

[0040] 200. Device for controlling a refrigeration system; 201. Processor; 202. Memory; 203. Communication interface; 204. Bus. DETAILED DESCRIPTION

[0041] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0042] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0043] Unless otherwise stated, the term "plurality" means two or more.

[0044] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0045] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0046] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0047] Combination Figure 1 As shown, the embodiment of the present disclosure provides a refrigeration system 1, including: a refrigerant circulation loop, a first refrigerant branch 60, a second refrigerant branch 40 and a refrigerant processing device 120. The refrigerant circulation loop includes a compressor 10, a condenser 20, a first evaporator 30 and a first throttling device 80 that are sequentially connected. The first evaporator 30 is installed in the refrigerated space. When the low-temperature refrigerant flows through its pipeline, it can provide cooling capacity to the space inside the refrigerated equipment box and reduce the temperature and humidity inside the box. When the refrigeration system is running for defrosting, high-temperature refrigerant flows through its pipeline. The first end of the first refrigerant branch 60 ( Figure 1 The lower end shown in FIG. 1 is connected between the outlet of the compressor 10 and the inlet of the condenser 20, and the second end ( Figure 1 The upper end (as shown) is connected between the outlet of the condenser 20 and the inlet of the first evaporator 30.

[0048] The first end of the second refrigerant branch 40 is connected to the first refrigerant branch 60, and the second end is connected between the outlet of the first evaporator 30 and the inlet of the compressor 10. The second refrigerant branch 40 includes a refrigerant pipe 42 and a second evaporator 41, the first end of the refrigerant pipe 42 is connected to the first refrigerant branch 60, and the second end of the refrigerant pipe 42 is connected between the outlet of the first evaporator 30 and the inlet of the compressor 10. The second evaporator 41 is arranged on the refrigerant pipe 42, so that the inlet of the second evaporator 41 is connected to the first refrigerant branch 60 through the refrigerant pipe 42, and the outlet of the second evaporator 41 is connected between the outlet of the first evaporator 30 and the inlet of the compressor 10 through the refrigerant pipe 42.

[0049] The air inlet side of the second evaporator 41 is arranged corresponding to the air outlet side of the first evaporator 30, and is closely attached to the first evaporator 30. High-temperature refrigerant flows through the pipeline of the second evaporator 41, which is used to heat the low-temperature air after being cooled by the first evaporator 30. At this time, the second evaporator 41 is used as a heat compensation evaporator, and the first evaporator 30 is used as a cooling evaporator.

[0050] The fan 50 is mounted on the fan cover and is disposed on the air inlet side of the first evaporator 30, and is used to drive the air in the refrigeration equipment box to circulate through the evaporator and flow out from the air outlet at the top of the fan cover.

[0051] Since the inlet of the second refrigerant branch 40 is connected to the first refrigerant branch 60, the first refrigerant branch 60 is divided into two sections with the connection position as the dividing point. The two sections can be controlled to be turned on or off respectively, so that the position where the inlet of the second evaporator 41 is connected to the refrigerant circulation circuit through the first refrigerant branch 60 can be switched.

[0052] After the refrigerant passes through the second evaporator 41 to dissipate heat, it is generally a high-pressure liquid refrigerant. However, since the compressor 10 cannot compress liquid, the high-pressure liquid refrigerant cannot be directly returned to the compressor. Therefore, the refrigerant treatment device 120 is connected between the outlet of the second evaporator 41 and the inlet of the compressor 10, and is used to process the refrigerant flowing out of the second evaporator 41 into a state that meets the requirements for delivery to the compressor 10, and then the processed refrigerant returns to the compressor 10.

[0053] In the refrigeration system provided by the embodiment of the present disclosure, the first refrigerant branch 40 is arranged in parallel with the pipeline part where the condenser 30 is located, and the second refrigerant branch 40 includes a second evaporator 41, and the inlet of the second evaporator 41 is connected to different positions of the refrigerant circulation loop through the first refrigerant branch 60. The second evaporator 41 is used as a heat compensation evaporator. When the access position of the inlet of the second evaporator 41 is different, the temperature of the refrigerant flowing into the second evaporator 41 is different, and then the second evaporator 41 The heat compensation of the low-temperature air after refrigeration by the first evaporator 30 is also different. In this way, it is possible to achieve different degrees of adjustment of the temperature and humidity of the return air, thereby improving the control accuracy of the temperature and humidity of the refrigerated space.

[0054] Optionally, the first refrigerant branch 60 includes: a first pipe section 61 and a second pipe section 62. The first end ( Figure 1 The first pipe section 61 is connected between the outlet of the compressor 10 and the inlet of the condenser 20. A first solenoid valve V1 is provided on the first pipe section 61. The first pipe section 61 can be turned on or off by controlling the switch of the first solenoid valve V1. Figure 1The upper end shown in FIG. 1 is connected between the outlet of the condenser 20 and the inlet of the first evaporator 30, and the second end of the second pipe section 62 ( Figure 1 The lower end shown in FIG. 1 and the second end of the first pipe section 61 ( Figure 1 The second pipe segment 62 is connected to the upper end of the second pipe segment 61 as shown. A second solenoid valve V2 is provided on the second pipe segment 62, and the second pipe segment 62 can be turned on or off by controlling the switch of the second solenoid valve V2. The first end of the refrigerant pipe 42 is connected between the second end of the first pipe segment 61 and the second end of the second pipe segment 62. In this way, based on the independent controlled conduction or cutoff of the first pipe segment 61 and the second pipe segment 62, the position where the inlet of the second evaporator 41 is connected to the refrigerant circulation circuit can be switched.

[0055] Optionally, a third solenoid valve V3 is further provided on the refrigerant pipe 42, and the third solenoid valve 43 is located at the inlet side of the second evaporator 41. By controlling the switch of the third solenoid valve V3, the conduction or cutoff of the second refrigerant branch 40 can be achieved. In this way, the third solenoid valve V3 cooperates with the first solenoid valve V1 and the second solenoid valve V2 to make the on-off control of the corresponding pipeline more accurate.

[0056] Optionally, a fourth solenoid valve V4 is provided at the inlet of the condenser 20, which can be controlled to be opened or closed. Optionally, the fourth solenoid valve V4 is located downstream of the communication position between the first end of the first refrigerant branch 60 and the refrigerant circulation circuit.

[0057] Optionally, a fifth solenoid valve V5 is provided between the outlet of the condenser 20 and the first throttling device 80, which can be controlled to open or close. Optionally, the fifth solenoid valve V5 is located downstream of the connection position between the second end of the first refrigerant branch 60 and the refrigerant circulation loop.

[0058] When the refrigeration system operates in the normal refrigeration mode, the fourth solenoid valve V4 and the fifth solenoid valve V5 are opened, and the other solenoid valves are closed. The refrigerant in the refrigeration system flows as follows: Figure 2 As shown by the middle dotted line, at this time, all the refrigerant flows through the first evaporator 30 .

[0059] Optionally, a filter 70 is further provided between the outlet of the condenser 20 and the fifth solenoid valve V5. The filter 70 is used to filter impurities and moisture in the refrigeration system. Specifically, the second end access position of the first refrigerant branch 60 is located at the rear end (downstream) of the filter 70. The first throttling device 80 is an expansion structure, which is used to throttle the high-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure liquid refrigerant.

[0060] When the refrigeration system operates in the first humidity control mode, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4 and the fifth solenoid valve V5 are opened, and the other solenoid valves are closed, so that the second evaporator 41 is connected to the refrigerant circulation loop through the second pipe section 62 of the first refrigerant branch 60. At this time, the refrigerant flows as follows Figure 3 As shown by the dotted line, the refrigerant flowing out of the compressor 10 passes through the condenser 20 and then splits into two paths. One path flows into the first evaporator 30 and then flows into the compressor 10 through the refrigerant treatment device 120. The other path flows into the second evaporator 41 and then flows into the compressor 10 through the refrigerant treatment device 120.

[0061] When the refrigeration system operates in the second humidity control mode, the first solenoid valve V1, the third solenoid valve V3, the fourth solenoid valve V4 and the fifth solenoid valve V5 are opened, and the other solenoid valves are closed, so that the second evaporator 41 is connected to the refrigerant circulation loop through the first pipe section 61 of the first refrigerant branch 60. At this time, the refrigerant flow direction is as shown by the dotted line in Figure 4: the refrigerant flowing out of the compressor 10 is divided into two paths, one path enters the condenser 20, passes through the first evaporator 30, and then flows into the compressor 10 after passing through the refrigerant treatment device 120. The other path enters the second evaporator 41, and then flows into the compressor 10 after passing through the refrigerant treatment device 120.

[0062] Figure 3 (First humidity control mode) and Figure 4 (Second humidity control mode) compared to Figure 4 The refrigerant flowing out of the compressor 10 directly enters the second evaporator 41, that is, the refrigerant temperature in the second evaporator 41 is higher, which makes the second evaporator 41 more heat-compensated for the return air, that is, the return air is drier. And because the greater the dehumidification degree, the lower the return air temperature. Figure 4 Suitable for modes with relatively low return air temperature. Figure 3 It is applicable to a mode with a relatively high return air temperature, that is, the dehumidification degree of the first humidity control mode is less than that of the second humidity control mode.

[0063] Combination Figure 5 As shown, the refrigeration system 1 also includes: a first temperature and humidity sensor 90 and a second temperature and humidity sensor 100. The first temperature and humidity sensor 90 is arranged between the air outlet side of the first evaporator 30 and the air inlet side of the second evaporator 41, and is used to detect the temperature and humidity of the return air after passing through the first evaporator 30. The second temperature and humidity sensor 100 is arranged on the air outlet side of the second evaporator 41, and is used to detect the temperature and humidity of the return air after passing through the first evaporator 30 and the second evaporator 41. The processor is connected to the first temperature and humidity sensor 90 and the second temperature and humidity sensor 100 for communication, and then controls the switch and opening of the first solenoid valve V1, the second solenoid valve V2 and the third solenoid valve V3 according to the detected temperature and humidity, so that the refrigeration system operates in different humidity control modes.

[0064] Combination Figure 6As shown, the refrigeration system 1 also includes: a defrost branch 110. The first end of the defrost branch 110 is connected to the outlet of the compressor 10, and the second end of the defrost branch 110 is connected to the inlet of the first evaporator 30. Specifically, the first end of the defrost branch 110 is connected to the pipeline between the first throttling device 80 and the inlet of the first evaporator 80, and the second end of the defrost branch 110 is connected to the pipeline between the outlet of the compressor 10 and the condenser 20. A sixth solenoid valve V6 is set on the defrost branch 110. When the refrigeration system runs in the defrost mode, the processor controls the sixth solenoid valve V6 to open, thereby controlling the defrost branch 110 to be turned on. At the same time, the other solenoid valves are controlled to close, thereby controlling the first refrigerant branch 60 and the refrigerant circulation loop to be cut off. At this time, the refrigerant flows as follows Figure 6 As shown by the middle dotted line: the refrigerant flowing out of the compressor 10 directly enters the first evaporator 30 , defrosts the first evaporator 30 , and then flows back to the compressor 10 .

[0065] Optionally, see again Figure 1 , the refrigerant treatment device 120 includes: a gas-liquid separator 121. The gas-liquid separator 121 is provided with an inlet 122, an outlet 123 and an oil return port 124. The pipeline after the outlet of the first evaporator 30 and the outlet of the second evaporator 41 are merged is connected to the inlet of the gas-liquid separator 121. The inlet of the compressor 10 includes an air inlet 11 and a process port 12. The air outlet 122 of the gas-liquid separator 121 is connected to the air inlet 11 of the compressor 10, and the oil return port 124 of the gas-liquid separator 121 is connected to the process port 12 of the compressor 10. The refrigerant becomes a high-pressure liquid refrigerant after heat dissipation in the second evaporator 41, and the high-pressure liquid refrigerant enters the gas-liquid separator 121. The gas-liquid separator 121 separates the refrigerant into gas and liquid, and the gaseous refrigerant returns to the compressor 10.

[0066] Optionally, combined Figure 7 As shown, the refrigerant treatment device 120 includes: a second throttling device 125 and a return air pipe 127. The second throttling device 125 is arranged on the refrigerant pipe 42, and the inlet of the second throttling device 125 is connected to the outlet of the second evaporator 41. A part or all of the return air pipe 127 is arranged in the compressor cabin, and at the same time, the first end of the return air pipe 127 is connected to the outlet of the second throttling device 125, and the second end is connected to the inlet of the compressor 10. When the second evaporator 41 performs thermal compensation, the high-temperature liquid refrigerant flowing out of the second evaporator 41 becomes a low-pressure liquid refrigerant after throttling and depressurization by the second throttling device 125, and then passes through the return air pipe 127, and becomes a low-pressure gaseous refrigerant under the heating of the compressor cabin heat, and then returns to the compressor 10. In this way, the second throttling device 125 can replace the gas-liquid separator 121.

[0067] Optionally, a pipeline formed by merging the outlet of the second throttling device 125 and the outlet of the second evaporator 41 is connected to the first end of the return air pipe 127 .

[0068] Optionally, combined Figure 8 As shown, the refrigerant treatment device 120 includes: a second throttling device 125 and a shell and tube heat exchanger 126. The second throttling device 125 is arranged on the refrigerant pipe 42, and the inlet of the second throttling device 125 is connected to the outlet of the second evaporator 41. The shell and tube heat exchanger 126 is provided with a first flow channel and a second flow channel. The first flow channel is connected between the outlet of the second throttling device 125 and the inlet of the compressor 10, and the second flow channel is connected between the outlet of the compressor 10 and the inlet of the condenser 20. When the second evaporator 41 performs heat compensation, the high-temperature liquid refrigerant flowing out of the second evaporator 41 becomes a low-pressure liquid refrigerant after throttling and depressurization by the second throttling device 125, and then enters the shell and tube heat exchanger 126. In the shell and tube heat exchanger 126, the high-temperature exhaust gas of the compressor 10 is used to heat the low-temperature liquid refrigerant flowing in after throttling, and the low-temperature liquid refrigerant is heated to a gaseous refrigerant, and then flows back to the compressor 10. In this way, the temperature of the high-temperature gaseous refrigerant discharged from the compressor 10 is reduced, thereby reducing the condensation pressure, which is beneficial to improving the economic efficiency of the entire refrigeration system operation.

[0069] Optionally, combined Fig. 9 As shown, the refrigeration system also includes: a third refrigerant branch 130 and a fourth refrigerant branch 140. A fifth solenoid valve V5 is provided on the inlet side of the first throttling device 80, and the fifth solenoid valve V5 and the first throttling device 80 are connected in parallel with the third refrigerant branch 130. Specifically, the first end of the third refrigerant branch 130 is connected to the pipeline between the outlet of the condenser 20 and the inlet of the fifth solenoid valve V5, and the second end of the third refrigerant branch 130 is connected to the pipeline between the outlet of the first throttling device 80 and the inlet of the first evaporator 30. In this way, the refrigerant flowing out of the condenser 20 can selectively flow into the first throttling device 80 or the third refrigerant branch 130. The third refrigerant branch 130 can be controlled to be turned on or off. Optionally, the third refrigerant branch 130 includes a seventh solenoid valve V7. The processor is in communication with the seventh solenoid valve V7, and the third refrigerant branch 130 is turned on or off by controlling the opening or closing of the seventh solenoid valve V7.

[0070] A third throttling device 150 is provided on the refrigerant pipe 42 and on the inlet side of the second evaporator 41, and a third solenoid valve V3 is provided on the refrigerant pipe 42 and on the inlet side of the third throttling device 150. The third solenoid valve V3 and the third throttling device 150 are connected in parallel with the fourth refrigerant branch 140. Specifically, the first end of the fourth refrigerant branch 140 is connected to the refrigerant pipe 42, and the connection position is located on the inlet side of the third solenoid valve V3. The second end of the fourth refrigerant branch 140 is connected to the pipeline between the outlet of the third throttling device 150 and the inlet of the second evaporator 41. In this way, the refrigerant can selectively flow into the third throttling device 150 or the fourth refrigerant branch 140. The fourth refrigerant branch 140 can be controlled to be turned on or off. Optionally, the fourth refrigerant branch 140 includes an eighth solenoid valve V8. The processor is in communication connection with the eighth solenoid valve V8, and realizes the conduction or cutoff of the fourth refrigerant branch 140 by controlling the opening or closing of the eighth solenoid valve V8.

[0071] When the first evaporator 30 completes defrosting once, the second evaporator 41 is controlled to be a refrigeration evaporator, and the first evaporator 30 is used as a heat compensation evaporator. During normal refrigeration, the fourth solenoid valve V4 is controlled to be open, the fifth solenoid valve V5 is controlled to be closed, the seventh solenoid valve V7 is controlled to be closed, the third solenoid valve V3 is controlled to be open, the eighth solenoid valve V8 is controlled to be closed, and the sixth solenoid valve is controlled to be closed. The refrigerant flows as follows: Fig.10 Shown by the dashed line.

[0072] By controlling the opening or closing of the first solenoid valve V1 to the eighth solenoid valve V8 (refrigerant circulation loop, first refrigerant branch), the functions of the first evaporator 30 and the second evaporator 41 can be controlled to be interchanged. Specifically, when the first solenoid valve V1 is closed, the second solenoid valve V2 is opened, the third solenoid valve V3 is opened, the fourth solenoid valve V4 is opened, the fifth solenoid valve V5 is closed, the sixth solenoid valve V6 is closed, the seventh solenoid valve V7 is opened, and the eighth solenoid valve V8 is closed, the first evaporator 30 is used as a thermal compensation evaporator, and the second evaporator 41 is used as a refrigeration evaporator.

[0073] When the first solenoid valve V1 is controlled to be closed, the second solenoid valve V2 is opened, the third solenoid valve V3 is closed, the fourth solenoid valve V4 is opened, the fifth solenoid valve V5 is opened, the sixth solenoid valve V6 is closed, the seventh solenoid valve V7 is closed, and the eighth solenoid valve V8 is opened, the first evaporator 30 is used as a refrigeration evaporator and the second evaporator 41 is used as a heat compensation evaporator.

[0074] See also Fig.11When the fifth solenoid valve V5 is controlled to be closed, the seventh solenoid valve V7 is controlled to be opened, the third solenoid valve V3 is controlled to be opened, the eighth solenoid valve V8 is controlled to be closed, and the sixth solenoid valve is controlled to be closed, the refrigerant flowing out of the condenser 20 is split, and a part of it flows into the third refrigerant branch 130, and then flows into the first evaporator 30. The other part flows into the third throttling device 150, and then flows into the second evaporator 41. The refrigeration system operates in the first humidity control mode.

[0075] See also Fig.12 When the fifth solenoid valve V5 is closed, the seventh solenoid valve V7 is closed, the third solenoid valve V3 is opened, the eighth solenoid valve V8 is closed, and the sixth solenoid valve is opened, the refrigerant flowing out of the compressor 10 is split, a part of which flows into the condenser 20, and then flows into the third throttling device 150 and the second evaporator 41 in sequence. The other part flows into the first evaporator 30. At this time, the refrigeration system operates in the second humidity control mode.

[0076] Combination Fig.13 As shown, the embodiment of the present disclosure provides a refrigeration device 2, comprising: a box body and the above-mentioned refrigeration system. The storage space in the box body is a refrigeration space.

[0077] Based on the above Figures 1 to 8 The refrigeration system shown, combined with Fig.14 As shown, the embodiment of the present disclosure provides a method for controlling a refrigeration system, comprising:

[0078] S101, the processor obtains a target humidity and determines a refrigeration evaporator and a heat compensation evaporator in a first evaporator and a second evaporator.

[0079] S102, the processor controls the position where the inlet of the heat compensation evaporator is connected to the refrigerant circulation loop according to the target humidity.

[0080] When the user needs dehumidification, the target humidity is set. The processor obtains the target humidity to determine the required dehumidification degree. The greater the dehumidification degree, the lower the return air temperature. In order to maintain the return air temperature within a certain range, the greater the heat compensation for the return air is required. Figures 1 to 8 In the refrigeration system shown, the first evaporator is used as a refrigeration evaporator, and the second evaporator is used as a heat compensation evaporator. Therefore, the position where the inlet of the heat compensation evaporator is connected to the refrigerant circulation loop is controlled according to the target humidity, thereby changing the temperature of the refrigerant in the heat compensation evaporator, thereby providing appropriate compensation heat for the return air.

[0081] According to the method for controlling a refrigeration system provided by the embodiment of the present disclosure, the target temperature is first obtained to determine the required degree of dehumidification. Then, the position where the inlet of the thermal compensation evaporator is connected to the refrigerant circulation loop is controlled based on the target humidity. The temperature of the refrigerant in the thermal compensation evaporator is different depending on the connection position. The refrigerant in the thermal compensation evaporator can perform thermal compensation on the return air after passing through the refrigeration evaporator. On the one hand, the return air can be dried to further reduce the humidity of the return air. On the other hand, the return air temperature can also be increased to maintain the return air temperature within a certain range. In this way, the return air temperature and humidity can be adjusted more accurately through the thermal compensation evaporator, thereby improving the control accuracy of the temperature and humidity of the refrigerated space.

[0082] Combination Fig.15 As shown, the embodiment of the present disclosure provides another method for controlling a refrigeration system, comprising:

[0083] S101, the processor obtains a target humidity and determines a refrigeration evaporator and a heat compensation evaporator in a first evaporator and a second evaporator.

[0084] S112, when the target humidity is greater than the humidity threshold, the processor controls the inlet of the heat compensation evaporator to be connected between the outlet of the condenser and the inlet of the refrigeration evaporator through the first refrigerant branch.

[0085] S122, when the target humidity is less than or equal to the humidity threshold, the processor controls the inlet of the heat compensation evaporator to be connected between the outlet of the compressor and the inlet of the condenser through the first refrigerant branch.

[0086] The user sets the humidity threshold and compares the target humidity with the humidity threshold. If the target humidity is greater than the humidity threshold, it means that the target humidity is relatively high and the dehumidification degree of the return air is relatively small. In this case, the temperature of the return air after dehumidification by the refrigeration evaporator is also relatively high. Figure 3 As shown, the second solenoid valve and the third solenoid valve are controlled to open, and then the inlet of the heat compensation evaporator is controlled to be connected between the outlet of the condenser and the inlet of the refrigeration evaporator through the first refrigerant branch. In this way, the refrigerant flowing out of the compressor first dissipates heat through the condenser, and then enters the heat compensation evaporator. The heat compensation evaporator uses the waste heat of the refrigerant to further dry the return air after passing through the refrigeration evaporator. In this way, the heat compensation evaporator can slightly reduce the humidity of the return air and maintain the return air temperature around the user's set temperature.

[0087] If the target humidity is less than or equal to the humidity threshold, it means that the target humidity is relatively low, the dehumidification degree of the return air is relatively large, and the return air temperature after dehumidification by the refrigeration evaporator is also relatively low. Figure 4As shown, the first solenoid valve and the third solenoid valve are controlled to open, and then the inlet of the thermal compensation evaporator is controlled to be connected between the outlet of the compressor and the inlet of the condenser through the refrigeration branch. In this way, the high-temperature refrigerant flowing out of the compressor directly enters the thermal compensation evaporator. The thermal compensation evaporator uses the high temperature of the refrigerant to further dry the return air flowing through the refrigeration evaporator, and the drying degree is greater. In this way, the thermal compensation evaporator can greatly reduce the humidity of the return air and maintain the return air temperature around the user-set temperature.

[0088] In this way, by comparing the target humidity with the humidity threshold, the access position of the inlet of the heat compensation evaporator is controlled, and then the temperature of the refrigerant in the heat compensation evaporator is adjusted to dry the return air after passing through the refrigeration evaporator to an appropriate degree, thereby improving the control accuracy of the return air temperature and humidity.

[0089] Optionally, the evaporation temperature of the refrigeration evaporator can be controlled by controlling the rotation speed of the fan.

[0090] Combination Fig.16 As shown, the embodiment of the present disclosure provides another method for controlling a refrigeration system, comprising:

[0091] S101, the processor obtains a target humidity and determines a refrigeration evaporator and a heat compensation evaporator in a first evaporator and a second evaporator.

[0092] S102, the processor controls the position where the inlet of the heat compensation evaporator is connected to the refrigerant circulation loop according to the target humidity.

[0093] S103: The processor calculates a first absolute humidity content corresponding to the target humidity and a second absolute humidity content corresponding to the humidity of the return air at the air outlet side of the refrigeration evaporator.

[0094] S104: The processor controls the rotation speed of the compressor according to the first absolute humidity content and the second absolute humidity content.

[0095] After controlling the inlet access position of the heat compensation evaporator, the absolute humidity content corresponding to the target humidity is calculated, and the calculation result is defined as the first absolute humidity content. At the same time, according to the humidity of the return air on the air outlet side of the refrigeration evaporator detected by the first temperature and humidity sensor, the corresponding absolute humidity content is calculated, and the calculation result is defined as the second absolute humidity content. By comparing the first absolute humidity content and the second absolute humidity content, it can be determined whether the return air humidity meets the user's requirements, and then the speed of the compressor is adjusted to adjust the flow rate of the refrigerant in the refrigeration evaporator and change the dehumidification capacity of the refrigeration evaporator for the return air.

[0096] Optionally, at S104, the processor controls the rotation speed of the compressor according to the first absolute moisture content and the second absolute moisture content, including:

[0097] When the product of the first absolute moisture content and the preset coefficient is greater than the second absolute moisture content, the processor controls the rotational speed of the compressor to decrease.

[0098] When the product of the first absolute moisture content and the preset coefficient is equal to the second absolute moisture content, the processor controls the rotational speed of the compressor to remain unchanged.

[0099] Theoretically, the absolute moisture content of the return air (the absolute moisture content of the return air entering the refrigerated space) after being dehumidified by the refrigeration evaporator and dried and heated by the heat compensation evaporator needs to be equal to the first absolute moisture content corresponding to the target humidity. The relationship between the first absolute moisture content and the second absolute moisture content should satisfy a×D1 = D2, where a is the preset coefficient, and the value range is 0 < a < 1; D1 is the first absolute moisture content, and D2 is the second absolute moisture content. That is, the absolute moisture content of the return air after being dried and heated by the heat compensation evaporator is slightly lower than the absolute moisture content of the return air after being dehumidified by the refrigeration evaporator.

[0100] If a×D1 = D2, it indicates that the absolute moisture content of the return air after being dehumidified by the refrigeration evaporator is appropriate, and the compressor rotational speed is controlled to remain unchanged. If a×D1 > D2, it indicates that the absolute moisture content of the return air after being dehumidified by the refrigeration evaporator is low. At this time, the compressor rotational speed is controlled to decrease to reduce the refrigerant flow rate in the refrigeration evaporator, and at the same time, the fan rotational speed is increased to increase the evaporation temperature of the refrigeration evaporator. Until a×D1 = D2, the compressor rotational speed is controlled to remain unchanged.

[0101] In this way, when the refrigeration evaporator dehumidifies the return air excessively, the refrigerant flow rate in the refrigeration evaporator is reduced by reducing the rotational speed of the compressor, thereby increasing the evaporation temperature of the refrigeration evaporator.

[0102] Combined Fig.17 As shown, another method for controlling a refrigeration system provided by an embodiment of the present disclosure includes:

[0103] S101, the processor obtains the target humidity and determines the refrigeration evaporator and the heat compensation evaporator in the first evaporator and the second evaporator.

[0104] S102, the processor controls the position where the inlet of the heat compensation evaporator is connected to the refrigerant circulation circuit according to the target humidity.

[0105] S103, the processor calculates the first absolute moisture content corresponding to the target humidity and the second absolute moisture content corresponding to the humidity of the return air on the outlet side of the refrigeration evaporator.

[0106] S104, the processor controls the rotational speed of the compressor according to the first absolute moisture content and the second absolute moisture content.

[0107] S105: When the product of the first absolute humidity content and the preset coefficient is equal to the second absolute humidity content, the processor obtains the temperature of the return air at the air outlet side of the heat compensation evaporator.

[0108] S106, the processor adjusts the amount of refrigerant flowing through the thermal compensation evaporator according to the temperature of the return air at the air outlet side of the thermal compensation evaporator.

[0109] The temperature of the return air after being cooled by the refrigeration evaporator will inevitably be lower than the user-set temperature. Therefore, when a×D1=D2 is satisfied, the temperature of the return air on the outlet side of the thermal compensation detected by the second temperature and humidity sensor is further obtained, that is, the temperature of the return air after being heated by the thermal compensation evaporator. It is determined whether the temperature of the return air on the outlet side of the thermal compensation reaches the user-set temperature, and the conduction opening of the pipeline where the thermal compensation evaporator is located is adjusted according to the judgment result. In this way, the refrigerant flow rate flowing into the thermal compensation evaporator can be adjusted, and then the heating capacity of the thermal compensation evaporator for the return air can be adjusted, thereby changing the temperature of the return air entering the refrigerated space, so that the temperature of the return air entering the refrigerated space reaches the user-set temperature. In this way, the control accuracy of the return air temperature can be improved.

[0110] Optionally, in S106, the processor adjusts the amount of refrigerant flowing through the thermal compensation evaporator according to the temperature of the return air at the air outlet side of the thermal compensation evaporator, including:

[0111] When the temperature of the return air at the air outlet side of the thermal compensation evaporator is lower than the temperature threshold, the processor controls the amount of refrigerant flowing through the thermal compensation evaporator to increase.

[0112] When the temperature of the return air on the air outlet side of the thermal compensation evaporator is equal to the temperature threshold, the processor controls the amount of refrigerant flowing through the thermal compensation evaporator to remain unchanged.

[0113] From the structure of the aforementioned refrigeration system, it can be seen that by adjusting the opening of the first solenoid valve and the third solenoid valve, or adjusting the opening of the second solenoid valve and the third solenoid valve, the conduction opening of the pipeline where the thermal compensation evaporator is located can be adjusted, thereby adjusting the amount of refrigerant flowing through the thermal compensation evaporator.

[0114] When the temperature of the return air on the outlet side of the thermal compensation evaporator is equal to the temperature threshold, it means that the return air temperature is appropriate, and the opening of the first solenoid valve and the third solenoid valve are controlled to remain unchanged (when running in the second humidity control mode), or the opening of the second solenoid valve and the third solenoid valve are controlled to remain unchanged (when running in the first humidity control mode), thereby controlling the conduction opening of the pipeline where the thermal compensation evaporator is located to remain unchanged, so that the amount of refrigerant flowing through the thermal compensation evaporator remains unchanged.

[0115] When the temperature of the return air on the outlet side of the thermal compensation evaporator is less than the temperature threshold, it means that the return air temperature is too low. Therefore, the opening of the first solenoid valve and the third solenoid valve is controlled to increase (when running the second humidity control mode), or the opening of the second solenoid valve and the third solenoid valve is controlled to increase (when running the first humidity control mode) to increase the refrigerant flow rate flowing into the thermal compensation evaporator, thereby increasing the heating effect of the thermal compensation evaporator on the low-temperature return air. Until the temperature of the return air on the outlet side of the thermal compensation evaporator is equal to the temperature threshold, the corresponding solenoid valve opening is controlled to remain unchanged to maintain the refrigerant flow rate flowing into the thermal compensation evaporator. In this way, by controlling the conduction opening of the pipeline where the thermal compensation evaporator is located, the refrigerant flow rate in the thermal compensation evaporator is adjusted, and then the return air temperature entering the refrigerated space is adjusted.

[0116] Combination Fig.18 As shown, the embodiment of the present disclosure provides another method for controlling a refrigeration system, comprising:

[0117] S101, the processor obtains a target humidity and determines a refrigeration evaporator and a heat compensation evaporator in a first evaporator and a second evaporator.

[0118] S102, the processor controls the position where the inlet of the heat compensation evaporator is connected to the refrigerant circulation loop according to the target humidity.

[0119] S103: The processor calculates a first absolute humidity content corresponding to the target humidity and a second absolute humidity content corresponding to the humidity of the return air at the air outlet side of the refrigeration evaporator.

[0120] S104: The processor controls the rotation speed of the compressor according to the first absolute humidity content and the second absolute humidity content.

[0121] S105: When the product of the first absolute humidity content and the preset coefficient is equal to the second absolute humidity content, the processor obtains the temperature of the return air at the air outlet side of the heat compensation evaporator.

[0122] S106, the processor adjusts the amount of refrigerant flowing through the thermal compensation evaporator according to the temperature of the return air at the air outlet side of the thermal compensation evaporator.

[0123] S107: When the temperature of the return air on the air outlet side of the thermal compensation evaporator is equal to the temperature threshold, the processor calculates a third absolute humidity content corresponding to the humidity of the return air on the air outlet side of the thermal compensation evaporator.

[0124] S108: When the third absolute humidity content is less than the first absolute humidity content, the processor controls the humidification operation.

[0125] When the temperature of the return air on the outlet side of the thermal compensation evaporator is equal to the temperature threshold, or the temperature of the return air on the outlet side of the thermal compensation evaporator is equal to the temperature threshold by controlling the conduction opening of the pipeline where the thermal compensation evaporator is located to increase, the absolute humidity content corresponding to the humidity of the return air on the outlet side of the thermal compensation evaporator is further calculated, and the calculation result is defined as the third absolute humidity content.

[0126] Compare the first absolute humidity content and the third absolute humidity content. If the third absolute humidity content is equal to the first absolute humidity content, it means that the humidity content of the return air entering the refrigerated space is appropriate, and humidification is not started. If the third absolute humidity content is less than the first absolute humidity content, it means that the heat compensation evaporator has over-dried the return air and humidity compensation is required. Therefore, at this time, the humidification module in the refrigeration equipment is controlled to be turned on and humidification is operated. In this way, the water vapor content in the refrigerated space is compensated until the third absolute humidity content is equal to the first absolute humidity content, and humidification is controlled to stop.

[0127] From the above, it can be seen that first, the refrigerant flow entering the refrigeration evaporator is adjusted by controlling the speed of the compressor, and then the moisture content of the return air passing through the refrigeration evaporator is adjusted. Then, the refrigerant flow entering the thermal compensation evaporator is adjusted by controlling the conduction opening of the pipeline where the thermal compensation evaporator is located, and then the heating effect of the thermal compensation evaporator on the return air is adjusted. Finally, the humidity of the return air entering the refrigerated space is adjusted by controlling whether the humidification is running in the refrigerated space. In this way, according to the order in which the return air flows through the refrigeration evaporator, the thermal compensation evaporator, and the refrigerated space, the temperature and humidity of the return air are adjusted step by step from the above three aspects, thereby achieving the control accuracy of improving the temperature and humidity of the return air.

[0128] Optionally, when the cumulative running time of the compressor reaches the first time length t1, the processor controls the sixth solenoid valve to open and the other solenoid valves to close, thereby controlling the defrost branch to conduct and start the defrost mode. When the defrost time is greater than the second time length t2, the defrost mode is exited.

[0129] Optionally, when the refrigeration system uses Fig. 9 In the structure shown in FIG. 1 , the first evaporator is used as a heat compensation evaporator, and the second evaporator is used as a refrigeration evaporator. If the refrigerant flowing out of the condenser is controlled to flow into the third refrigerant branch and the second refrigerant branch respectively, the refrigeration system operates in the first humidity control mode, and the refrigerant flows as follows Fig.11 If the refrigerant flowing out of the compressor is controlled to flow into the heat compensation evaporator and condenser of the condenser respectively, and the refrigerant flowing out of the condenser flows into the second refrigerant branch, the refrigeration system operates in the second humidity control mode, and the refrigerant flows as follows Fig.12 When this structure is adopted, the return air temperature and humidity can be adjusted according to the above method for controlling the refrigeration system. In step S106, when adjusting the amount of refrigerant flowing through the thermal compensation evaporator, if the refrigerant flow direction is Fig.11As shown, the amount of refrigerant entering the thermal compensation evaporator is adjusted by adjusting the conduction degree of the third refrigerant branch (i.e., the opening degree of the seventh solenoid valve V7). Fig.12 As shown, the amount of refrigerant entering the thermal compensation evaporator is adjusted by adjusting the conduction degree of the defrost branch (ie, the opening degree of the fourth solenoid valve V4).

[0130] Combination Fig.19 As shown, the embodiment of the present disclosure provides a device 180 for controlling a refrigeration system, including: an acquisition module 191 and a control module 192. The acquisition module 191 is configured to acquire a target humidity and determine a refrigeration evaporator and a thermal compensation evaporator in a first evaporator and a second evaporator. The control module 192 is configured to control the position of the inlet of the thermal compensation evaporator connected to the refrigerant circulation loop according to the target humidity.

[0131] Using the device 180 for controlling a refrigeration system provided by the embodiment of the present disclosure, the target temperature is first obtained to determine the required degree of dehumidification. Then, based on the target humidity, the position at which the inlet of the thermal compensation evaporator is connected to the refrigerant circulation loop is controlled. The temperature of the refrigerant in the thermal compensation evaporator is different depending on the connection position. The refrigerant in the thermal compensation evaporator can perform thermal compensation on the return air after passing through the refrigeration evaporator. On the one hand, the return air can be dried to further reduce the humidity of the return air. On the other hand, the return air temperature can also be increased to maintain the return air temperature within a certain range. In this way, the return air temperature and humidity can be adjusted more accurately through the thermal compensation evaporator, thereby improving the control accuracy of the temperature and humidity of the refrigerated space.

[0132] Combination Fig. 20 As shown, an embodiment of the present disclosure provides a device 200 for controlling a refrigeration system, including a processor 201 and a memory 202. Optionally, the device 200 may also include a communication interface 203 and a bus 204. The processor 201, the communication interface 203, and the memory 202 may communicate with each other through the bus 204. The communication interface 203 may be used for information transmission. The processor 201 may call the logic instructions in the memory 202 to execute the method for controlling a refrigeration system of the above embodiment.

[0133] In addition, the logic instructions in the memory 202 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0134] The memory 202 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 201 executes the function application and data processing by running the program instructions / modules stored in the memory 202, that is, the method for controlling the refrigeration system in the above embodiment is implemented.

[0135] The memory 202 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 202 may include a high-speed random access memory and may also include a non-volatile memory.

[0136] Combination Fig.13 As shown, an embodiment of the present disclosure provides a refrigeration device 2, including: a refrigeration device body, and the above-mentioned device 190 (200) for controlling the refrigeration system. The device 190 (200) for controlling the refrigeration system is installed on the refrigeration device body. The installation relationship described here is not limited to placement inside the refrigeration device body, but also includes installation connections with other components of the refrigeration device 2, including but not limited to physical connections, electrical connections or signal transmission connections, etc. Those skilled in the art can understand that the device 190 (200) for controlling the refrigeration system can be adapted to a feasible product body, thereby realizing other feasible embodiments.

[0137] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling a refrigeration system.

[0138] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, such as: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes.

[0139] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0140] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0141] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0142] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A refrigeration system, characterized in that: include: A refrigerant circulation loop includes: a compressor, a condenser, a first throttling device and a first evaporator connected to each other; A first refrigerant branch, a first end of which is connected between the outlet of the compressor and the inlet of the condenser, and a second end of which is connected between the outlet of the condenser and the inlet of the first evaporator; The second refrigerant branch includes: a second evaporator, the air inlet side of the second evaporator is arranged corresponding to the air outlet side of the first evaporator, the inlet of the second evaporator is connected to the first refrigerant branch, and the outlet is connected between the outlet of the first evaporator and the inlet of the compressor; A refrigerant processing device is connected between the outlet of the second evaporator and the inlet of the compressor, and is used to process the received refrigerant into a state that can be delivered to the compressor; The first refrigerant branch can be controlled to be opened or closed in sections, so as to switch the position where the inlet of the second evaporator is connected to the refrigerant circulation loop through the first refrigerant branch.

2. The refrigeration system according to claim 1, characterized in that: The first refrigerant branch includes: A first pipe section, a first end of which is connected between the outlet of the compressor and the inlet of the condenser, and the first pipe section can be controlled to be turned on or off; A second pipe section, a first end of which is connected between the outlet of the condenser and the inlet of the first evaporator, a second end of which is connected to the second end of the first pipeline, and the second pipe section can be controlled to be turned on or off; The inlet of the second evaporator is connected between the first pipe section and the second pipe section.

3. The refrigeration system according to claim 1, characterized in that: When the first humidity control mode is in operation, the inlet of the second evaporator is connected between the outlet of the condenser and the inlet of the first evaporator through the first refrigerant branch; When the second humidity control mode is in operation, the inlet of the second evaporator is connected between the outlet of the compressor and the inlet of the condenser through the first refrigerant branch; The dehumidification degree of the first humidity control mode is smaller than the dehumidification degree of the second humidity control mode.

4. The refrigeration system according to claim 1, characterized in that: Also includes: A first temperature and humidity sensor is disposed between the air outlet side of the first evaporator and the air inlet side of the second evaporator, and is used to detect the temperature and humidity of the return air after passing through the first evaporator; The second temperature and humidity sensor is arranged at the air outlet side of the second evaporator, and is used to detect the temperature and humidity of the return air after passing through the first evaporator and the second evaporator.

5. The refrigeration system according to claim 1, characterized in that: Also includes: A defrost branch, a first end of which is connected to the outlet of the compressor, and a second end of which is connected to the inlet of the first evaporator; Wherein, when the defrost mode is in operation, the defrost branch is controlled to be turned on, and the first refrigerant branch is controlled to be turned off.

6. The refrigeration system according to claim 1, characterized in that: The refrigerant handling device includes: A gas-liquid separator is provided with an inlet, a gas outlet and a liquid outlet, and the inlet of the gas-liquid separator is connected to the outlet of the second evaporator; The inlet of the compressor includes an air inlet and a liquid inlet, the air outlet of the gas-liquid separator is connected to the inlet of the compressor, and the liquid outlet of the gas-liquid separator is connected to the liquid inlet of the compressor.

7. The refrigeration system according to claim 1, characterized in that: The refrigerant handling device includes: a second throttling device, the inlet of which is connected to the outlet of the second evaporator; The return air pipe is partially or completely arranged in the compressor cabin, and one end of the return air pipe is connected to the outlet of the second throttling device, and the other end is connected to the inlet of the compressor.

8. The refrigeration system according to claim 1, characterized in that: The refrigerant handling device includes: a second throttling device, the inlet of which is connected to the outlet of the second evaporator; The shell and tube heat exchanger is provided with a first flow channel and a second flow channel. The first flow channel is connected between the outlet of the second throttling device and the inlet of the compressor, and the second flow channel is connected between the outlet of the compressor and the inlet of the condenser.

9. The refrigeration system according to any one of claims 1 to 8, characterized in that: Also includes: A third refrigerant branch, a fifth solenoid valve is provided on the inlet side of the first throttling device, and the fifth solenoid valve and the first throttling device are connected in parallel with the third refrigerant branch; A fourth refrigerant branch, a third throttling device is provided on the inlet side of the second evaporator, a third solenoid valve is provided on the inlet side of the third throttling device, and the third solenoid valve and the third throttling device are connected in parallel with the fourth refrigerant branch; The third refrigerant branch and the fourth refrigerant branch can be controlled to be turned on or off, so that the first evaporator or the second evaporator is used as a heat compensation evaporator.

10. A refrigeration device, characterized in that: A refrigeration system comprising the refrigeration system as claimed in any one of claims 1 to 9.

11. A method for controlling a refrigeration system, characterized in that: Applied to a refrigeration system according to any one of claims 1 to 9, the method comprises: acquiring a target humidity, and determining a refrigeration evaporator and a heat compensation evaporator in the first evaporator and the second evaporator; According to the target humidity, the position where the inlet of the heat compensation evaporator is connected to the refrigerant circulation loop is controlled.

12. The method according to claim 11, characterized in that According to the target humidity, control the position where the inlet of the heat compensation evaporator is connected to the refrigerant circulation loop, including: When the target humidity is greater than the humidity threshold, the inlet of the heat compensation evaporator is controlled to be connected between the outlet of the condenser and the inlet of the refrigeration evaporator through the first refrigerant branch; When the target humidity is less than or equal to the humidity threshold, the inlet of the heat compensation evaporator is controlled to be connected between the outlet of the compressor and the inlet of the condenser through the first refrigerant branch.

13. The method according to claim 11 or 12, characterized in that: The method further comprises: Calculating a first absolute humidity corresponding to the target humidity and a second absolute humidity corresponding to the humidity of the return air at the air outlet side of the refrigeration evaporator; The rotation speed of the compressor is controlled according to the first absolute humidity content and the second absolute humidity content.

14. The method according to claim 13, characterized in that According to the first absolute moisture content and the second absolute moisture content, the speed of the compressor is adjusted, including: When the product of the first absolute moisture content and the preset coefficient is greater than the second absolute moisture content, controlling the speed of the compressor to decrease; When the product of the first absolute moisture content and the preset coefficient is equal to the second absolute moisture content, the rotation speed of the compressor is controlled to remain unchanged.

15. The method according to claim 13, characterized in that The method further comprises: When the product of the first absolute humidity content and the preset coefficient is equal to the second absolute humidity content, obtaining the temperature of the return air at the air outlet side of the heat compensation evaporator; The amount of refrigerant flowing through the heat compensation evaporator is adjusted according to the temperature of the return air on the air outlet side of the heat compensation evaporator.

16. The method according to claim 15, characterized in that The second refrigerant branch can be controlled to be turned on or off; According to the temperature of the return air on the outlet side of the thermal compensation evaporator, the amount of refrigerant flowing through the thermal compensation evaporator is adjusted, including: When the temperature of the return air on the air outlet side of the thermal compensation evaporator is lower than the temperature threshold, the amount of refrigerant flowing through the thermal compensation evaporator is controlled to increase; When the temperature of the return air on the air outlet side of the thermal compensation evaporator is equal to the temperature threshold, the amount of refrigerant flowing through the thermal compensation evaporator is controlled to remain unchanged.

17. The method according to claim 15, characterized in that After adjusting the amount of refrigerant flowing through the thermal compensation evaporator according to the temperature of the return air at the air outlet side of the thermal compensation evaporator, the method further includes: When the temperature of the return air on the air outlet side of the thermal compensation evaporator is equal to the temperature threshold, calculating a third absolute humidity content corresponding to the humidity of the return air on the air outlet side of the thermal compensation evaporator; In a case where the third absolute humidity content is smaller than the first absolute humidity content, the humidification operation is controlled.

18. A device for controlling a refrigeration system, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to perform the method for controlling a refrigeration system according to any one of claims 11 to 17 when executing the program instructions.

19. A computer-readable storage medium storing program instructions, characterized in that: When the program instructions are executed, the computer is used to execute the method for controlling a refrigeration system according to any one of claims 11 to 17.

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