Refrigerating system of tank container

Abstract

The utility model relates to a refrigerating system of a tank container. The refrigeration system of the tank container comprises a refrigeration unit, a heat exchange unit, a cooling unit, a detection unit and a control unit. The refrigeration unit comprises a compressor, a condenser, an evaporator and a circulation pipeline communicating the compressor, the condenser and the evaporator, and the circulation pipeline is filled with refrigerants. The heat exchange unit comprises a heat exchange pipeline, the heat exchange pipeline is filled with a secondary refrigerant, and the secondary refrigerant is used for bringing heat of the tank into the evaporator. The cooling unit comprises a cooling pipeline and a cooling device, and the cooling device is used for cooling the secondary refrigerant in the cooling pipeline. The detection unit is used for detecting the temperature of the secondary refrigerant. The control unit comprises a controller and a control valve. The controller is used for controlling the control valve to be communicated with the cooling pipeline or the heat exchange pipeline according to temperature detection signals of the detection unit. According to the refrigerating system, the influence of too high refrigerant temperature on the system can be reduced, and the working temperature range of the refrigerating system is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to tank container technical field, especially a kind of refrigeration system of tank container. BACKGROUND

[0002] Long-distance transportation battery electrolyte, fresh food, chemical goods etc. are mainly applied tank container, and these goods need to be in a certain temperature range during transportation, and the current technology used to control the temperature of tank container is to equip it with refrigeration system.

[0003] The existing refrigeration system of tank container often appears the situation that refrigeration system cannot work normally due to the high temperature of refrigerant when running. For example, when the temperature of refrigerant is too high, more gas will be produced in the evaporator by evaporation of refrigerant, and more gas will lead to higher intensity compression work of subsequent compressor for compressing gaseous refrigerant. Over time, it will cause the thermal protection of compressor, so that the refrigeration system cannot work normally, and even cause the damage of devices in the refrigeration system. Therefore, a refrigeration system of tank container that runs more stably is urgently needed. SUMMARY

[0004] One purpose of the utility model is to solve the problems existing in the prior art, and provide a refrigeration system of tank container. To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A refrigeration system of tank container, comprising:

[0006] A refrigeration unit, comprising a compressor, a condenser and an evaporator, and a circulation pipeline connecting the compressor, the condenser and the evaporator, the circulation pipeline being filled with refrigerant, the refrigerant releasing heat in the condenser and absorbing heat in the evaporator;

[0007] A heat exchange unit, comprising a heat exchange pipeline, the heat exchange pipeline being connected to the refrigeration pipeline on the tank container and being communicated with the evaporator, the heat exchange pipeline being filled with coolant, and the coolant being used to bring the heat of the tank container into the evaporator;

[0008] A cooling unit, comprising a cooling pipeline and a cooling device, the cooling pipeline being communicated with the evaporator, and the cooling device being used to cool the coolant in the cooling pipeline, and the coolant being cooled by the cooling device and then entering the evaporator;

[0009] A detection unit is arranged on the heat exchange pipeline, and the detection unit is used to detect the temperature of the coolant;

[0010] a control unit comprising a controller and a control valve, the controller being electrically connected with the detecting unit and the control valve, the control valve being used to control the flow of the cooling medium into the cooling pipeline or the heat exchange pipeline, and the controller being used to control the control valve to connect the cooling pipeline or the heat exchange pipeline according to the temperature detecting signal of the detecting unit.

[0011] In one of the embodiments, the control valve is a three-way valve, one of the interfaces of the three-way valve is connected with the cooling medium outlet of the evaporator, and the other two interfaces of the three-way valve are connected with the cooling pipeline and the heat exchange pipeline respectively, so that the cooling medium outputted by the evaporator can selectively enter the cooling pipeline for cooling or enter the heat exchange pipeline for refrigerating the tank.

[0012] In one of the embodiments, the detecting unit comprises a temperature sensor, and the temperature sensor is arranged on the pipeline at the side of the cooling medium outlet of the evaporator.

[0013] The controller is electrically connected with the temperature sensor, and the controller is used to control the control valve to connect the cooling pipeline or the heat exchange pipeline according to the temperature detecting signal of the temperature sensor.

[0014] In one of the embodiments, the cooling device comprises a cooling box, and a part of the cooling pipeline is arranged in the cooling box, and the cooling box stores a cooling medium, and the cooling medium is used to cool the cooling medium in the cooling pipeline.

[0015] In one of the embodiments, the cooling device comprises a cooling fan, and the cooling fan is arranged corresponding to the cooling pipeline, and the cooling fan is used to air cool the cooling medium in the cooling pipeline.

[0016] In one of the embodiments, the refrigeration system further comprises a pressure relief device, and the pressure relief device is arranged on the cooling pipeline, and the pressure relief device is used to balance the internal and external pressure difference of the cooling pipeline.

[0017] In one of the embodiments, the refrigeration system further comprises a pressure relief device, and the pressure relief device is arranged on the heat exchange pipeline, and the pressure relief device is used to balance the internal and external pressure difference of the heat exchange pipeline.

[0018] In one of the embodiments, the refrigeration system further comprises a driving pump, and the driving pump is arranged on the pipeline at the side of the cooling medium inlet of the evaporator, and the driving pump is used to drive the flow of the cooling medium.

[0019] In one of the embodiments, the refrigeration system further comprises an adjusting valve and a pressure detecting device, the adjusting valve is arranged on the circulating pipeline and is used to connect the compressor and the evaporator, and the pressure detecting device is used to detect the pressure of the circulating pipeline.

[0020] The adjusting valve is electrically connected with the pressure detecting device, and the adjusting valve is used to open or close according to the pressure detecting signal of the pressure detecting device.

[0021] In one of the embodiments, the refrigeration unit further comprises a condenser fan, which is arranged correspondingly to the condenser;

[0022] The controller is electrically connected with the pressure detection device and the condenser fan, and is configured to control the start or stop of the condenser fan according to the pressure detection signal of the pressure detection device.

[0023] From the above technical solution, the present application has at least the following advantages and positive effects:

[0024] In the present application, the refrigeration system of the tank container comprises a refrigeration unit, a heat exchange unit, a cooling unit, a detection unit and a control unit. When the refrigerant temperature in the refrigeration unit is too high, the cooling unit can be used to cool the cooling medium, and the cooled cooling medium can be used for heat exchange with the refrigerant to effectively reduce the refrigerant temperature. Therefore, the refrigeration system of the tank container of the present application can effectively reduce the influence of the high temperature of the refrigerant on the system, avoid the increase of the load of the refrigeration system caused by the high temperature of the refrigerant, and thus ensure the normal operation of the refrigeration system.

[0025] In addition, the cooling unit can effectively reduce the temperature of the cooling medium, and the detection unit and the control unit can be used to monitor and adjust the temperature of the cooling medium in real time, so as to effectively prevent the over-evaporation of the refrigerant in the evaporator caused by the high temperature of the cooling medium, and avoid the failure of the refrigeration system caused by the excessive compression work pressure of the compressor. Therefore, the refrigeration system of the tank container of the present application has a wider working temperature range, better stability, safety and adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a refrigeration system structure diagram of a tank container according to an embodiment of the present application.

[0027] Figure 2 is a control principle diagram of the refrigeration system of the tank container according to an embodiment of the present application.

[0028] The following is a description of the reference signs:

[0029] 10-refrigeration unit; 11-compressor; 12-condenser; 13-evaporator; 14-circulation pipeline; 15-regulating valve; 16-pressure detection device; 17-condenser fan;

[0030] 20-heat exchange unit; 21-heat exchange pipeline; 22-driving pump;

[0031] 30-cooling unit; 31-cooling pipeline; 32-cooling device;

[0032] 40-detection unit; 41-temperature sensor;

[0033] 50 - control unit; 51 - controller; 52 - control valve. DETAILED DESCRIPTION

[0034] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can be implemented in various ways, and that the embodiments described herein are not the only ways in which the present application can be practiced. It should also be understood that the description and drawings herein are illustrative only and do not restrict the present application in any way.

[0035] In the description of the present application, it should be understood that the indications of direction or positional relationship (such as up, down, left, right, front and back, etc.) in the embodiments shown in the drawings are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the positions of these elements change, the indications of direction will also change accordingly.

[0036] In addition, the terms "first" and "second" are only for descriptive purposes and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0037] Please refer to Figure 1 and Figure 2 The refrigeration system of the tank container according to the present application comprises a refrigeration unit 10, a heat exchange unit 20, a cooling unit 30, a detection unit 40 and a control unit 50. The refrigeration unit 10 comprises a compressor 11, a condenser 12 and an evaporator 13, and a circulating pipeline 14 connecting the compressor 11, the condenser 12 and the evaporator 13. The circulating pipeline 14 is filled with refrigerant, which releases heat in the condenser 12 and absorbs heat in the evaporator 13. For example, the refrigerant can be freon.

[0038] It should be noted that the refrigeration unit 10 can also comprise an expansion valve, a drier, a liquid tank for storing refrigerant and other commonly used devices in refrigeration systems, which are not limited in the present application.

[0039] The heat exchange unit 20 comprises a heat exchange pipeline 21, which is connected to the refrigeration pipeline on the tank and is in communication with the evaporator 13. The heat exchange pipeline 21 is filled with a coolant, which is used to bring the heat of the tank into the evaporator 13. For example, the coolant can be ethylene glycol, or the coolant can also be water or other liquids.

[0040] When the refrigeration system is in normal operation, the refrigerant in the refrigeration unit 10 exchanges heat with the external environment, and then exchanges heat with the carrier refrigerant in the heat exchange unit 20, so as to transfer heat or cold to the carrier refrigerant. The carrier refrigerant exchanges heat with the medium in the tank container, so as to refrigerate the medium in the tank container, and make the tank container adapt to a wider temperature requirement for transportation.

[0041] However, when the carrier refrigerant exchanges heat with the refrigerant, if the temperature of the carrier refrigerant is too high, the refrigerant will absorb more heat, so that the temperature of the refrigerant is too high, which indirectly causes the refrigerant to evaporate more gas in the evaporator 13, and more gas causes the compressor 11 to compress the gaseous refrigerant to perform higher intensity compression work. In the long run, the compressor 11 will be protected from heat, so that the refrigeration system cannot work normally.

[0042] Therefore, in the present application, the cooling unit 30 is arranged to cool the carrier refrigerant, so as to avoid the adverse effects of the high temperature of the refrigerant on the compressor 11. For example, as shown in Figure 1 The cooling unit 30 includes a cooling pipeline 31 and a cooling device 32. The cooling pipeline 31 communicates with the evaporator 13. The cooling device 32 is used to cool the carrier refrigerant in the cooling pipeline 31. The carrier refrigerant is cooled by the cooling device 32 and then enters the evaporator 13.

[0043] In the embodiment, the cooling unit 30 is arranged to cool the carrier refrigerant, which can effectively prevent the carrier refrigerant from being too high in temperature, so that the refrigerant is not excessively evaporated in the evaporator 13 due to the high temperature, and the compressor 11 is not caused to perform compression work with excessive pressure, so that the refrigeration system cannot work normally.

[0044] Referring to Figure 1 In one embodiment, the cooling device 32 includes a cooling tank. Part of the cooling pipeline 31 is arranged in the cooling tank. The cooling tank stores a cooling medium, which is used to cool the carrier refrigerant in the cooling pipeline 31. The cooling medium can be water or ethylene glycol or other cooling liquid.

[0045] In the embodiment, when the carrier refrigerant in the cooling pipeline 31 passes through the cooling tank, the carrier refrigerant can be cooled by the cooling medium, so that the temperature of the carrier refrigerant is reduced, and the temperature of the refrigerant is prevented from being too high, so as to ensure the normal operation of the refrigeration system.

[0046] In other embodiments, the cooling device 32 can include a cooling fan, which is arranged corresponding to the cooling pipeline 31. The cooling fan is used to air cool the carrier refrigerant in the cooling pipeline 31. In the embodiment, the cooling fan can quickly take away the heat of the carrier refrigerant in the cooling pipeline 31, so as to effectively reduce the temperature of the carrier refrigerant.

[0047] In other embodiments, the cooling device 32 can simultaneously include a cooling box and a cooling fan corresponding to the cooling box. Thus, by simultaneously cooling the coolant in the cooling pipeline 31 by the cooling box and the cooling fan, the cooling speed of the coolant can be accelerated, and the cooling efficiency of the coolant can be improved.

[0048] It can be understood that, in other embodiments, the cooling device 32 can also be a cooler or the like cooling structure, which can be selected as required.

[0049] In an embodiment, the refrigeration system further includes a pressure relief device. The pressure relief device can be arranged on the cooling pipeline 31, and can be used to balance the internal and external pressure difference of the cooling pipeline 31.

[0050] The pressure relief device can also be arranged on the heat exchange pipeline 21, and can be used to balance the internal and external pressure difference of the heat exchange pipeline 21. The pressure relief device can be a vent valve or a pressure relief valve, or the like.

[0051] By arranging the pressure relief device, the interior of the cooling pipeline 31 and / or the heat exchange pipeline 21 can be communicated with the outside as required, the internal and external pressure difference of the pipeline can be balanced, the problem that the temperature of the coolant is too high or too low, which causes a certain degree of change of the pipeline pressure in the system, and the hidden danger problem that the change of the pipeline pressure affects the safe operation of the overall system can be solved.

[0052] As shown in FIGS. 1, 2 and 3, the refrigeration system further includes a detection unit 40 and a control unit 50. Figure 1 and Figure 2 In the present application, the detection unit 40 is mainly used to detect the temperature of the coolant output by the evaporator 13. The control unit 50 is used to cool the coolant according to the temperature detection signal of the detection unit 40.

[0053] Specifically, the detection unit 40 can be arranged on the heat exchange pipeline 21, and can detect the temperature of the coolant output by the evaporator 13. For example, the detection unit 40 includes a temperature sensor 41, which can be arranged on the pipeline on the coolant outlet side of the evaporator 13. When the temperature sensor 41 detects that the temperature of the coolant is high, it indicates that the coolant needs to be cooled. The temperature sensor 41 can be a contact temperature sensor. Alternatively, the temperature sensor 41 can also be a non-contact temperature sensor.

[0054] As shown in FIGS. 1, 2 and 3, the refrigeration system further includes a detection unit 40 and a control unit 50. Figure 2 The control unit 50 includes a controller 51 and a control valve 52. The controller 51 can be a PLC controller. The control valve 52 can be arranged between the evaporator 13 and the cooling pipeline 31 and the heat exchange pipeline 21, and is used to control the coolant to enter the cooling pipeline 31 or the heat exchange pipeline 21.

[0055] For example, control valve 52 can be a three-way valve. One port of the three-way valve is connected to the refrigerant outlet of evaporator 13, and the other two ports of the three-way valve are connected to cooling line 31 and heat exchange line 21 respectively, so that the refrigerant output from evaporator 13 can selectively enter cooling line 31 for cooling or enter heat exchange line 21 to refrigerate the tank.

[0056] The controller 51 is electrically connected to both the temperature sensor 41 and the three-way valve. The controller 51 can control the three-way valve to connect either the cooling pipe 31 or the heat exchange pipe 21 based on the temperature detection signal from the temperature sensor 41. For example, such as... Figure 1 As shown, the ports of the three-way valve can be port 52a, port 52b, and port 52c. Port 52a is connected to the refrigerant outlet of the evaporator 13 and is always open. Port 52b is connected to the cooling pipe 31, and port 52c is connected to the heat exchange pipe 21.

[0057] When temperature sensor 41 detects that the refrigerant temperature is too high, controller 51 can control the three-way valve interface 52c to close and interface 52b to open, allowing the refrigerant to enter the cooling pipe 31 for cooling. After the refrigerant has undergone several cooling cycles, when temperature sensor 41 detects that the refrigerant temperature has reached the set appropriate temperature, controller 51 can control the three-way valve interface 52c to open and interface 52b to close, allowing the refrigerant to normally enter the heat exchange pipe 21 to exchange heat with the refrigerant in the evaporator 13, thereby achieving cooling of the tank.

[0058] The refrigeration system of this application embodiment uses a cooling unit 30 to cool the refrigerant and a detection unit 40 and a control unit 50 to monitor and adjust the refrigerant temperature in real time. This allows the refrigerant to selectively enter the cooling pipe 31 for cooling or enter the heat exchange pipe 21 to cool the tank. This effectively prevents the refrigerant from over-evaporating in the evaporator 13 due to excessively high refrigerant temperature, avoids the compressor 11 from malfunctioning due to excessive compression pressure, and effectively reduces the impact of excessively high refrigerant temperature on the system. It also avoids increased system load due to excessively high refrigerant temperature, ensuring the normal operation of the system.

[0059] like Figure 1 As shown, in one embodiment, the refrigeration system may further include a drive pump 22, which may be connected to a pipe on the refrigerant inlet side of the evaporator 13. The drive pump 22 is used to drive the flow of the refrigerant, so as to realize the continuous circulation of the refrigerant in the cooling pipe 31 or the heat exchange pipe 21 into the evaporator 13, thereby ensuring the circulating cooling of the refrigerant or the continuous cooling of the tank by the refrigerant.

[0060] It should be noted that when the temperature of the refrigerant in the refrigeration system is too low, the pressure in the pipeline of the refrigeration system will decrease, which will result in the decrease of the evaporation temperature of the refrigerant in the evaporator 13, and the refrigerant will not be able to absorb enough heat, which will affect the refrigeration effect of the carrier refrigerant on the tank.

[0061] Therefore, referring to Figure 1 In one embodiment of the present application, the refrigeration system further comprises a regulating valve 15 and a pressure detection device 16. The regulating valve 15 is arranged on the circulation pipeline 14 and is used to communicate the compressor 11 and the evaporator 13. The pressure detection device 16 is used to detect the pressure of the circulation pipeline 14. The regulating valve 15 is electrically connected with the pressure detection device 16 and is used to open or close according to the pressure detection signal of the pressure detection device 16.

[0062] For example, when the pressure detection device 16 detects that the pressure in the circulation pipeline 14 is too low, it can control the regulating valve 15 to open, so that the refrigerant at the outlet of the compressor 11 can directly enter the evaporator 13, and the refrigerant does not pass through the condenser 12. In this way, the amount of refrigerant entering the condenser 12 can be reduced by the pressure detection device 16 and the regulating valve 15 to avoid the further decrease of the temperature of the refrigerant, so as to effectively prevent the further decrease of the pressure in the circulation pipeline 14, and to facilitate the guarantee of the overall refrigeration effect.

[0063] When the temperature of the refrigerant is too high, which results in the excessive pressure in the circulation pipeline 14, the pressure detection device 16 can control the regulating valve 15 to close, so that the refrigerant can normally flow into the condenser 12 for condensation and heat release.

[0064] In other embodiments, the pressure in the circulation pipeline 14 can also be detected by a pressure sensor arranged on the circulation pipeline 14. The controller 51 can be electrically connected with the pressure sensor and the regulating valve 15. When the pressure sensor detects that the pressure in the circulation pipeline 14 is too low, the regulating valve 15 is controlled to open by the controller 51.

[0065] Referring to Figure 1 In one embodiment, the refrigeration unit 10 further comprises a condensing fan 17, which is arranged corresponding to the condenser 12. The number of the condensing fan 17 can be multiple. Each condensing fan 17 can take away the heat released by the condenser 12, so as to improve the heat dissipation effect of the refrigerant in the condenser 12 and improve the condensation effect.

[0066] For example, the controller 51 is electrically connected with the pressure detection device 16 and the condensing fan 17, and the controller 51 is used to control the start or stop of the condensing fan 17 according to the pressure detection signal of the pressure detection device 16. When the refrigerant temperature is too low, the pressure in the circulating pipeline 14 will be too low, and the pressure detection device 16 will send the detected pressure signal to the controller 51. Then the controller 51 can determine that the pressure in the circulating pipeline 14 is too low, and then it can control all or part of the condensing fan 17 to stop rotating, so as to avoid the further decrease of the refrigerant temperature and the further decrease of the pressure in the circulating pipeline 14.

[0067] When the refrigerant temperature is too high, the pressure in the circulating pipeline 14 will be too high, and at this time the pressure detection device 16 can control the adjusting valve 15 to be closed. At the same time, the pressure detection device 16 sends the detected pressure signal to the controller 51, and then the controller 51 can determine that the pressure in the circulating pipeline 14 is too high, and can control all the condensing fans 17 to start, so as to increase the condensing heat dissipation effect of the condenser 12, thereby avoiding the over-high pressure in the circulating pipeline 14.

[0068] The refrigeration system of the embodiment of the present application can accurately adjust the flow of the refrigerant according to the pressure change in the circulating pipeline 14 by setting the adjusting valve 15 and the pressure detection device 16, so as to avoid the over-low pressure in the pipeline caused by the over-low temperature of the refrigerant, thereby ensuring that the refrigerant can normally absorb heat in the evaporator 13 and ensuring the refrigeration effect of the carrier refrigerant on the tank.

[0069] In the present application, the cooling unit 30 capable of cooling the carrier refrigerant is added, and the carrier refrigerant temperature can be intelligently controlled by the detection unit 40 and the control unit 50, so as to effectively avoid the problem of over-high temperature of the refrigerant in the refrigeration system. Moreover, the flow of the refrigerant entering the condenser 12 can be adjusted by the pressure detection device 16 and the adjusting valve 15, so as to effectively avoid the problem of over-low temperature of the refrigerant in the refrigeration system. Therefore, the refrigeration temperature range of the refrigeration system is effectively widened, so that when the refrigerant temperature is too high or too low, the refrigeration system can adaptively prevent the refrigerant from being further too high or too low, thereby ensuring the normal operation of the refrigeration system and protecting the refrigeration effect of the refrigeration system.

[0070] The refrigeration system of the tank container of the embodiment of the present application cools the carrier refrigerant by the cooling unit, and the carrier refrigerant after being cooled exchanges heat with the refrigerant, so as to effectively reduce the refrigerant temperature. Therefore, the influence of the over-high temperature of the refrigerant on the refrigeration system can be reduced, the load of the refrigeration system caused by the over-high temperature of the refrigerant can be prevented, and the normal operation of the refrigeration system is ensured.

[0071] The refrigeration system of the tank container of the embodiment of the application can adjust the flow of refrigerant into the condenser through the pressure detection device and the regulating valve, avoid further reduction of the temperature of the refrigerant, effectively prevent further reduction of the pressure in the circulating pipeline, ensure that the refrigerant can normally absorb heat in the evaporator, and ensure the refrigeration effect of the carrier refrigerant on the tank.

[0072] The refrigeration system of the tank container of the embodiment of the application can protect the refrigeration system from the influence of excessively high refrigerant temperature and prevent the reduction of the refrigeration efficiency caused by excessively low refrigerant temperature through the bidirectional temperature protection mechanism. Thus, the working temperature range of the refrigeration system is effectively widened, the refrigeration system can adaptively prevent the refrigerant from being excessively high or excessively low when the refrigerant temperature is excessively high or excessively low, and the refrigeration system is effectively protected from the influence of the fluctuation of the refrigerant temperature, thereby improving the overall refrigeration effect and system safety of the refrigeration system.

[0073] The above embodiments are only exemplary descriptions of structures, and the structures in the embodiments are not fixedly combined structures. In the absence of structural conflicts, the structures in the embodiments can be arbitrarily combined.

[0074] Although the present application has been described with reference to several exemplary embodiments, it will be understood that the terms used are terms of description and illustration and are not restrictive terms. Since the present application can be embodied in various forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be interpreted broadly within the spirit and scope of the appended claims, and all changes and modifications that fall within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A refrigeration system for a refrigerated container, characterized in that The application relates to a refrigeration system, which comprises a refrigeration unit, a heat exchange unit, a cooling unit, a detection unit and a control unit. The refrigeration unit comprises a compressor, a condenser and an evaporator, and a circulation pipeline connected with the compressor, the condenser and the evaporator, wherein the circulation pipeline is filled with refrigerant, the refrigerant releases heat in the condenser and absorbs heat in the evaporator. The heat exchange unit comprises a heat exchange pipeline connected with a refrigeration pipeline on a tank and the evaporator, wherein the heat exchange pipeline is filled with a coolant, and the coolant is used to bring the heat of the tank into the evaporator. The cooling unit comprises a cooling pipeline connected with the evaporator and a cooling device used to cool the coolant in the cooling pipeline, wherein the cooled coolant enters the evaporator through the cooling device. The detection unit is arranged on the heat exchange pipeline and used to detect the temperature of the coolant. The control unit comprises a controller and a control valve, wherein the controller is electrically connected with the detection unit and the control valve, the control valve is used to control the coolant to enter the cooling pipeline or the heat exchange pipeline, and the controller is used to control the control valve to connect the cooling pipeline or the heat exchange pipeline according to the temperature detection signal of the detection unit.

2. A refrigeration system for a tank container according to claim 1, characterized in that The control valve is a three-way valve, one interface of the three-way valve is connected with the coolant outlet of the evaporator, and the other two interfaces of the three-way valve are respectively connected with the cooling pipeline and the heat exchange pipeline, so that the coolant output by the evaporator can selectively enter the cooling pipeline for cooling or enter the heat exchange pipeline to refrigerate the tank.

3. The refrigeration system of a tank container according to claim 1, characterized in that, The detection unit comprises a temperature sensor arranged on the pipeline on the side of the coolant outlet of the evaporator. The controller is electrically connected with the temperature sensor, and the controller is used to control the control valve to connect the cooling pipeline or the heat exchange pipeline according to the temperature detection signal of the temperature sensor.

4. The refrigeration system of a tank container according to claim 1, characterized in that, The cooling device comprises a cooling box, part of the cooling pipeline is arranged in the cooling box, and the cooling box stores a cooling medium used to cool the coolant in the cooling pipeline.

5. The refrigeration system of a tank container according to claim 1, characterized in that, The cooling device comprises a cooling fan arranged corresponding to the cooling pipeline, and the cooling fan is used to air cool the coolant in the cooling pipeline.

6. The refrigeration system of a tank container according to claim 1, characterized in that, The pressure relief device is arranged on the cooling pipeline and used to balance the pressure difference between the inside and outside of the cooling pipeline.

7. The refrigeration system of a tank container according to claim 1, characterized in that, The pressure relief device is arranged on the heat exchange pipeline and used to balance the pressure difference between the inside and outside of the heat exchange pipeline.

8. The refrigeration system of a tank container according to claim 1, characterized in that, The driving pump is arranged on the pipeline on the side of the coolant inlet of the evaporator and used to drive the flow of the coolant.

9. A refrigeration system for a tank container according to any one of claims 1 to 8, characterized in that, The regulating valve is arranged on the circulation pipeline and used to connect the compressor and the evaporator, and the pressure detection device is used to detect the pressure of the circulation pipeline. The adjusting valve is electrically connected with the pressure detecting device, and is used for opening or closing according to a pressure detecting signal of the pressure detecting device.

10. A refrigeration system for a tank container according to claim 9, characterized in that The refrigeration unit further comprises a condenser fan, which is arranged correspondingly with the condenser. The controller is electrically connected with the pressure detecting device and the condenser fan, and is used for controlling starting or stopping of the condenser fan according to a pressure detecting signal of the pressure detecting device.

Images