Refrigerating system of thermal management unit

Abstract

The utility model relates to the field of heat management of energy storage stations, and discloses a refrigerating system of a heat management unit. The heat management unit refrigerating system comprises a first refrigerating cycle and a second refrigerating cycle which are arranged in parallel, and the first refrigerating cycle comprises a first condenser, a first electronic expansion valve, a first heat exchanger, a first temperature sensor, a first pressure sensor and a first compressor which are communicated in sequence; the second refrigeration cycle comprises a second condenser, a second electronic expansion valve, a second heat exchanger, a second temperature sensor, a second pressure sensor and a second compressor which are communicated in sequence; the first heat exchanger and the second heat exchanger are arranged in the same heat exchange box, the first refrigeration cycle and the second refrigeration cycle are arranged in parallel, the first refrigeration cycle and the second refrigeration cycle can operate independently or synchronously, the operation efficiency of the heat management unit is improved, and the operation cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of thermal management of energy storage stations, and in particular to a refrigeration system of a thermal management unit. Background Art

[0002] As a clean, environmentally friendly and sustainable energy source, electric energy is widely used in various fields. Batteries, as the main storage device for electric energy, have also been widely used. With the development of new energy technologies in my country, the technology integrating photovoltaics, energy storage, charging and discharging, and fast replacement of automotive power batteries has made continuous breakthroughs. The thermal management system during battery charging and discharging is a part of the construction of energy storage stations and battery swap stations. In existing thermal management units, a single refrigeration system and a single water pump are usually used for liquid cooling and liquid heating solutions when charging and discharging batteries, and the opening and closing of each branch cannot be controlled separately. The refrigeration system responds slowly to temperature regulation, has high energy consumption, low operating efficiency, and high operating costs. Therefore, it is urgent to develop a thermal management unit with a more efficient refrigeration system to improve battery heat dissipation efficiency, improve operating efficiency, and reduce operating costs. Utility Model Content

[0003] The utility model aims to provide a refrigeration system of a thermal management unit, so as to improve the operation efficiency of the refrigeration system of the thermal management unit and reduce the operation cost.

[0004] In order to solve the above technical problems, the implementation method of the utility model provides a technical solution as follows:

[0005] A refrigeration system of a thermal management unit includes a first refrigeration cycle and a second refrigeration cycle set up in parallel, the first refrigeration cycle includes a first condenser, a first electronic expansion valve, a first heat exchanger, a first temperature sensor, a first pressure sensor, and a first compressor connected in sequence; the second refrigeration cycle includes a second condenser, a second electronic expansion valve, a second heat exchanger, a second temperature sensor, a second pressure sensor, and a second compressor connected in sequence; the first heat exchanger and the second heat exchanger are arranged in the same heat exchange box.

[0006] Furthermore, the first temperature sensor and the first pressure sensor are connected to the first electronic expansion valve through a controller, and the second temperature sensor and the second pressure sensor are connected to the second electronic expansion valve through a controller.

[0007] Furthermore, a first exhaust temperature sensor and a first high-pressure protection switch are provided between the first compressor and the first condenser; and a second exhaust temperature sensor and a second high-pressure protection switch are provided between the second compressor and the second condenser.

[0008] Furthermore, a first condensing temperature sensor and a first condensing pressure sensor are provided between the first condenser and the first electronic expansion valve; and a second condensing temperature sensor and a second condensing pressure sensor are provided between the second condenser and the second electronic expansion valve.

[0009] Furthermore, a first mesh filter is provided between the first condenser and the first electronic expansion valve, and a second mesh filter is provided between the second condenser and the second electronic expansion valve.

[0010] Furthermore, a first drying filter is provided between the first heat exchanger and the first compressor, and a second drying filter is provided between the second heat exchanger and the second compressor.

[0011] Furthermore, the first condenser and the second condenser are fixedly arranged on the same bracket in an L shape, and the first condenser and the second condenser are combined into a U shape.

[0012] Compared with the prior art, the refrigeration system of the thermal management unit provided by the utility model is characterized by the parallel establishment of the first refrigeration cycle and the second refrigeration cycle. The first refrigeration cycle and the second refrigeration cycle can be operated separately or synchronously, thereby improving the operating efficiency of the thermal management unit and saving operating costs. The L-shaped first condenser and the second condenser are assembled into a U-shape, which saves the lateral installation space of the condenser and improves the heat dissipation efficiency of the refrigeration system of the thermal management unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0014] Figure 1 It is a three-dimensional structural diagram of the refrigeration system of the thermal management unit of the utility model;

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the refrigeration system of the thermal management unit of the utility model at different angles;

[0016] Figure 3 This is a schematic diagram of a refrigeration system of a thermal management unit of the utility model.

[0017] Explanation of the reference numerals: 100, first refrigeration cycle; 101, first condenser; 102, first electronic expansion valve; 103, first heat exchanger; 104, first temperature sensor; 105, first pressure sensor; 106, first compressor; 107, first exhaust temperature sensor; 108, first high-pressure protection switch; 109, first mesh filter; 110, first condensing temperature sensor; 111, first condensing pressure sensor; 112, first drying filter; 200, second refrigeration cycle; 201, second condenser; 202, second electronic expansion valve; 203, second heat exchanger; 204, second temperature sensor; 205, second pressure sensor; 206, second compressor; 207, second exhaust temperature sensor; 208, second high-pressure protection switch; 209, second mesh filter; 210, second condensing temperature sensor; 211, second condensing pressure sensor; 212, second drying filter; 300, heat exchange box. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0019] like Figure 1-3 As shown, in the embodiment of the utility model, the refrigeration system of the thermal management unit includes a first refrigeration cycle 100 and a second refrigeration cycle 200, and the first refrigeration cycle 100 and the second refrigeration cycle 200 are arranged in parallel. The first refrigeration cycle 100 includes a first condenser 101, a first electronic expansion valve 102, a first heat exchanger 103, a first temperature sensor 104, a first pressure sensor 105, and a first compressor 106 which are connected in sequence. The first condenser 101, the first electronic expansion valve 102, the first heat exchanger 103, the first temperature sensor 104, the first pressure sensor 105, and the first compressor 106 are connected through pipelines to form a sealed circulation pipeline; the first temperature sensor 104 and the first pressure sensor 105 are arranged at the downstream pipeline of the first heat exchanger 103, and are used to measure the gas temperature and pressure at the outlet of the first heat exchange pipeline.

[0020] The second refrigeration cycle 200 includes a second condenser 201, a second electronic expansion valve 202, a second heat exchanger 203, a second temperature sensor 204, a second pressure sensor 205, and a second compressor 206 which are connected in sequence. The second condenser 201, the second electronic expansion valve 202, the second heat exchanger 203, the second temperature sensor 204, the second pressure sensor 205, and the second compressor 206 are connected through pipelines to form a sealed circulation pipeline; the second temperature sensor 204 and the second pressure sensor 205 are arranged at the downstream pipeline of the second heat exchanger 203, and are used to measure the gas temperature and pressure at the pipeline outlet of the second heat exchanger 203.

[0021] The thermal management unit refrigeration system further includes a heat exchange box 300 , in which the first heat exchanger 103 and the second heat exchanger 203 are arranged in parallel.

[0022] In one embodiment, a first exhaust temperature sensor 107 and a first high-pressure protection switch 108 are provided between the first compressor 106 and the first condenser 101. The first exhaust temperature sensor 107 is used to measure the gas temperature in the outlet pipe of the first compressor 106. The first high-pressure protection switch 108 is used to detect whether the high-pressure gas flowing in the pipe to the first condenser 101 exceeds a preset value. When the gas in the pipe exceeds the preset value of the first high-pressure protection switch 108, the first high-pressure protection switch 108 sends a signal to stop the operation of the first refrigeration cycle 100. A second exhaust temperature sensor 207 and a second high-pressure protection switch 208 are provided between the second compressor 206 and the second condenser 201. The second exhaust temperature sensor 207 is used to measure the gas temperature of the second compressor 2 06 The gas temperature in the outlet pipeline, the second high-pressure protection switch 208 is used to detect whether the high-pressure gas flowing in the pipeline to the second condenser 201 exceeds a preset value. When the gas in the pipeline exceeds the preset value of the second high-pressure protection switch 208, the second high-pressure protection switch 208 sends a signal to stop the operation of the second refrigeration cycle 200. A first mesh filter 109 is provided between the first condenser 101 and the first electronic expansion valve 102, and the first mesh filter 109 is used to filter the refrigerant impurity particles in the first refrigeration system circulation pipeline; a second mesh filter 209 is provided between the second condenser 201 and the second electronic expansion valve 202, and the second mesh filter 209 is used to filter the refrigerant impurity particles in the pipeline of the second refrigeration cycle 200.

[0023] In one embodiment, a first condensing temperature sensor 110 and a first condensing pressure sensor 111 are provided between the first condenser 101 and the first mesh filter 109, the first condensing temperature sensor 110 is used to detect the temperature of the refrigerant in the outlet pipe of the first condenser 101, and the first condensing pressure sensor 111 is used to detect the pressure of the refrigerant in the outlet pipe of the first condenser 101; a second condensing temperature sensor 210 and a second condensing pressure sensor 211 are provided between the second condenser 201 and the second mesh filter 209, the second condensing temperature sensor 210 is used to detect the temperature of the refrigerant in the outlet pipe of the second condenser 201, and the second condensing pressure sensor 211 is used to detect the pressure of the refrigerant in the outlet pipe of the second condenser 201.

[0024] In one embodiment, the first condenser 101 is L-shaped, and the second condenser 201 is L-shaped. One end of the first condenser 101 and one end of the second condenser 201 are fixed on the same bracket. The combination of the first condenser 101 and the second condenser 201 is roughly U-shaped. Compared with the planar condenser design, the first condenser 101 and the second condenser 201 are docked and installed in a U-shape, which effectively saves lateral installation space and improves the heat dissipation efficiency within the limited installation space of the thermal management unit.

[0025] In one embodiment, a first drying filter 112 is further provided between the first compressor 106 and the first heat exchanger 103, and an inlet of the first drying filter 112 is connected to an outlet of the first heat exchanger 103. The refrigerant in the first refrigeration cycle 100 enters the first drying filter 112 after evaporation and vaporization through the first heat exchanger 103, and enters the first compressor 106 through the first drying filter 112. The first drying filter 112 is used to filter harmful substances and adsorb moisture from the refrigerant gas, thereby protecting the first compressor 106. A second drying filter 212 is further provided between the second compressor 206 and the second heat exchanger 203, and an inlet of the second drying filter 212 is connected to an outlet of the second heat exchanger 203. The refrigerant in the second refrigeration cycle 200 enters the second drying filter 212 after evaporation and vaporization through the second heat exchanger 203, and enters the second compressor 206 through the second drying filter 212. The second drying filter 212 is used to filter harmful substances and adsorb moisture from the refrigerant gas, thereby protecting the second compressor 206.

[0026] When in use, the first refrigeration cycle 100 and the second refrigeration cycle 200 can be operated separately or simultaneously. The first refrigeration cycle 100 and the second refrigeration cycle 200 operate in the same manner. Here, the first refrigeration cycle 100 is taken as an example for explanation. When the first refrigeration cycle 100 operates, the refrigerant flows in the first refrigeration cycle 100 pipeline in a gaseous or liquid state. The first electronic expansion valve 102 is arranged upstream of the first heat exchanger 103. The first electronic expansion valve 102 is connected to the first temperature expansion valve 102 arranged in the downstream pipeline of the first heat exchanger 103. The communication connection between the first temperature sensor 104 and the second pressure sensor 205 is established, and the first electronic expansion valve 102 controls the opening and closing degree according to the signals of the first temperature sensor 104 and the second pressure sensor 205, so as to control the flow rate of the refrigerant flowing into the first heat exchanger 103; the refrigerant absorbs heat and vaporizes into a high-temperature and high-pressure gas through the first heat exchanger 103, and flows into the first condenser 101; the refrigerant releases heat and liquefies into a high-pressure liquid through the first condenser 101; the high-pressure liquid is filtered by the first mesh filter 109, and then flows to the first electronic expansion valve 102, and circulates continuously to cool the outside.

[0027] The refrigeration system of the thermal management unit provided by the utility model is established by setting up a first refrigeration cycle and a second refrigeration cycle in parallel. The first refrigeration cycle and the second refrigeration cycle can be operated separately or synchronously, thereby improving the operating efficiency of the thermal management unit and saving operating costs. The L-shaped first condenser and the second condenser are assembled into a U-shape, which saves the lateral installation space of the condenser and improves the heat dissipation efficiency of the refrigeration system of the thermal management unit.

[0028] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A refrigeration system of a thermal management unit, characterized in that: The invention comprises a first refrigeration cycle (100) and a second refrigeration cycle (200) which are arranged in parallel. The first refrigeration cycle (100) comprises a first condenser (101), a first electronic expansion valve (102), a first heat exchanger (103), a first temperature sensor (104), a first pressure sensor (105), and a first compressor (106) which are connected in sequence. The second refrigeration cycle (200) comprises a second condenser (201), a second electronic expansion valve (202), a second heat exchanger (203), a second temperature sensor (204), a second pressure sensor (205), and a second compressor (206) which are connected in sequence. The first heat exchanger (103) and the second heat exchanger (203) are arranged in the same heat exchange box (300).

2. The thermal management unit refrigeration system according to claim 1, characterized in that: The first temperature sensor (104) and the first pressure sensor (105) are connected to the first electronic expansion valve (102) through a controller, and the second temperature sensor (204) and the second pressure sensor (205) are connected to the second electronic expansion valve (202) through a controller.

3. The thermal management unit refrigeration system according to claim 2, characterized in that: A first exhaust temperature sensor (107) and a first high-pressure protection switch (108) are provided between the first compressor (106) and the first condenser (101); and a second exhaust temperature sensor (207) and a second high-pressure protection switch (208) are provided between the second compressor (206) and the second condenser (201).

4. The thermal management unit refrigeration system according to claim 1, characterized in that: A first condensing temperature sensor (110) and a first condensing pressure sensor (111) are provided between the first condenser (101) and the first electronic expansion valve (102); and a second condensing temperature sensor (210) and a second condensing pressure sensor (211) are provided between the second condenser (201) and the second electronic expansion valve (202).

5. The thermal management unit refrigeration system according to claim 1, characterized in that: A first mesh filter (109) is provided between the first condenser (101) and the first electronic expansion valve (102), and a second mesh filter (209) is provided between the second condenser (201) and the second electronic expansion valve (202).

6. The thermal management unit refrigeration system according to claim 1, characterized in that: A first drying filter (112) is provided between the first heat exchanger (103) and the first compressor (106), and a second drying filter (212) is provided between the second heat exchanger (203) and the second compressor (206).

7. The thermal management unit refrigeration system according to claim 1, characterized in that: The first condenser (101) and the second condenser (201) are fixedly arranged on the same bracket in an L shape, and the first condenser (101) and the second condenser (201) are combined into a U shape.

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