Gas cooling system with pre-cooling function

Abstract

The utility model relates to the field of air refrigeration, and discloses a gas cooling system with a precooling function, which comprises a compressor I, a condenser I, a dry filter I, a throttling device I and a heat exchange device I which are sequentially connected end to end, the first compressor, the first condenser, the first drying filter, the first throttling device and the first heat exchange device form a first-stage refrigerating loop. The compressor II, the condenser II, the dryer II, the throttling device II and the heat exchanger II are sequentially connected end to end; the compressor II, the condenser II, the dryer II, the throttling device II and the heat exchanger II form a secondary refrigerating loop; wherein the condenser II is connected with the dryer II through a heat exchanger I; an air inlet pipeline bypasses the first heat exchanger, and the air outlet end is connected to the second heat exchanger. Air is pre-cooled by the first heat exchanger, enters the second heat exchanger for secondary heat exchange and then flows out from the air outlet end. The refrigerating system has the advantages of reliable refrigeration, low power, energy conservation and the like.

Description

Technical Field

[0001] This utility model relates to the field of material testing, and in particular to a gas cooling system with pre-cooling function. Background Technology

[0002] The thermal shock testing system is used to test the structural integrity of materials under continuous exposure to extremely high and low temperatures in a short period of time, enabling the detection of chemical changes or physical damage caused by thermal expansion and contraction. As shown in the figure, a heat exchanger facilitates heat exchange between air and refrigerant, generating the extremely high or low temperature air required for the test material. However, the compressor generates very little heat under low evaporation temperatures, resulting in a low load and excess cooling capacity. This excess cooling capacity is not fully utilized. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a gas cooling system with a pre-cooling function.

[0004] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0005] A gas cooling system with pre-cooling function includes a compressor, a condenser, a dryer filter, a throttling device, and a heat exchanger connected in sequence; the compressor, condenser, dryer filter, throttling device, and heat exchanger form a primary refrigeration circuit.

[0006] It also includes compressor two, condenser two, dryer two, throttling device two and heat exchanger two connected in sequence; compressor two, condenser two, dryer two, throttling device two and heat exchanger two form a two-stage refrigeration circuit;

[0007] The condenser 2 and the dryer 2 are connected by a heat exchanger 1; the air inlet pipe is bypassed on the heat exchanger 1, and the air outlet is connected to the heat exchanger 2.

[0008] Preferably, heat exchanger one includes three heat exchange channels. Channel one is used for the refrigerant to pass through in the primary refrigeration circuit, channel two is used for the refrigerant to pass through in the secondary refrigeration circuit, and channel three is used to connect to the intake pipe for air pre-cooling.

[0009] Preferably, the power of compressor two is less than that of compressor one.

[0010] Preferably, the heat exchanger includes two flow channels, one for the refrigerant of the secondary refrigeration circuit and the other for air.

[0011] Preferably, the air flows out after passing through heat exchanger one and heat exchanger two sequentially from the air inlet.

[0012] Compared with existing technologies, this solution has the following advantages: The processing system designed in this solution can pre-cool the air during refrigeration, thereby reducing the load on compressor two and allowing compressor two and its corresponding heat exchanger two to be scaled down, thus reducing power consumption. Specifically, the heat exchange area is reduced by 38%, the power of compressor two is reduced by 25%, and the entire system is more energy-efficient and reliable. Attached Figure Description

[0013] Figure 1 This is a control system diagram of the device.

[0014] The technical names of the labels in the figure are as follows: 1—Compressor; 1, 2—Condenser; 2, 3—Dryer Filter; 3, 4—Throttling Device; 4, 5—Heat Exchanger; 5, 6—Compressor II; 6, 7—Condenser II; 7, 8—Dryer Filter II; 8, 9—Throttling Device II; 9, 10—Heat Exchanger II; 10, 11—Inlet Pipeline; 11, 12—Outlet End; 12, 13—Flow Channel I; 13, 14—Flow Channel II; 14, 15—Flow Channel III. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0016] Example 1

[0017] A gas cooling system with pre-cooling function includes a compressor-1, a condenser-2, a dryer-filter-3, a throttling device-4, and a heat exchange device-1 connected in sequence; the compressor-1, condenser-2, dryer-filter-3, throttling device-4, and heat exchange device-1 form a primary refrigeration circuit.

[0018] It also includes compressor 26, condenser 27, dryer 28, throttling device 29 and heat exchanger 210 connected in sequence; compressor 26, condenser 27, dryer 28, throttling device 29 and heat exchanger 210 form a two-stage refrigeration circuit.

[0019] The condenser 2 (7) and dryer 2 (2) are connected by a heat exchanger 1 (5). An inlet pipe 11 is bypassed on heat exchanger 1 (5), and the air outlet 12 is connected to heat exchanger 2 (10). Air is pre-cooled by heat exchanger 1 (5) before entering heat exchanger 2 (10) for secondary heat exchange, and then flows out from outlet 12. Heat exchanger 1 (5) includes three heat exchange channels: channel 1 (13) for the refrigerant in the primary refrigeration circuit, channel 2 (14) for the refrigerant in the secondary refrigeration circuit, and channel 3 (15) for connecting to the inlet pipe 11 for air pre-cooling. The heat exchanger in refrigeration circuit 1 can exchange heat and cool the refrigerant in refrigeration circuit 2, thus achieving a lower output heat exchange temperature for refrigeration circuit 2. However, heat exchanger 5 has a low heat exchange efficiency due to the low temperature, so it loses some cooling capacity. This solution creatively uses a three-channel structure to pre-cool the air. During the pre-cooling process, the air passing through heat exchanger 5 and the refrigerant in the second refrigeration circuit have basically the same temperature, thereby improving the heat exchange efficiency of the air passing through heat exchanger 10.

[0020] In this system design, the air is cooled through two stages of heat exchange, which places a lower load on the compressor compared to a single stage of cooling. Moreover, since the cooling capacity of the first refrigeration circuit is fully utilized, the power requirement of the second compressor 6 is lower than that of the prior art, thus reducing the power of the second compressor 6. In this scheme, the power of the second compressor 6 is less than that of the first compressor 1.

[0021] Since the air has been pre-cooled by heat exchanger 5, heat exchanger 10 can significantly reduce the heat exchange area compared to the original single-stage heat exchanger, thus making heat exchanger 10 smaller overall and more cost-effective.

[0022] In this design, heat exchanger 2 10 includes two flow channels: one for the refrigerant in the secondary refrigeration circuit and the other for air. The air flows out after passing through heat exchanger 1 5 and heat exchanger 2 10 sequentially from the inlet end.

[0023] For example, if the temperature needs to be lowered to -80 degrees Celsius, heat exchanger 5 of refrigeration circuit 1 can pre-cool the air and the refrigerant of refrigeration circuit 2 to about -35 degrees Celsius. Then the air enters heat exchanger 10 through the pipe, and heat exchanger 10 cools the air a second time, so that the air can reach about -80 degrees Celsius after heat exchange.

[0024] Compared with existing technologies, this solution has the following advantages: The processing system designed in this solution can pre-cool the air during refrigeration, thereby reducing the load on compressor 6 and allowing compressor 6 and the corresponding heat exchanger 10 to be scaled down, thus reducing power consumption. Specifically, the heat exchange area is reduced by 38%, the power of compressor 6 is reduced by 25%, and the entire system is more energy-efficient and reliable.

[0025] Example 2

[0026] The difference between this embodiment and embodiment 1 is that both heat exchanger 5 and heat exchanger 10 are shell-and-tube evaporators.

[0027] Example 3

[0028] The difference between this embodiment and embodiment 1 is that both heat exchanger 5 and heat exchanger 10 are plate heat exchangers.

Claims

1. A gas cooling system with pre-cooling function, characterized in that: It includes a compressor (1), a condenser (2), a dryer filter (3), a throttling device (4), and a heat exchange device connected in sequence; the compressor (1), the condenser (2), the dryer filter (3), the throttling device (4), and the heat exchange device form a primary refrigeration circuit. It also includes compressor two (6), condenser two (7), dryer two, throttling device two (9) and heat exchanger two (10) connected end to end in sequence; compressor two (6), condenser two (7), dryer two (8), throttling device two (9) and heat exchanger two (10) form a two-stage refrigeration circuit; The condenser 2 (7) and the dryer 2 (8) are connected by a heat exchanger 1 (5); the air inlet pipe (11) is bypassed on the heat exchanger 1 (5), and the air outlet (12) is connected to the heat exchanger 2 (10); the air is pre-cooled by the heat exchanger 1 (5) and then enters the heat exchanger 2 (10) for secondary heat exchange, and then flows out from the outlet (12).

2. The gas cooling system with pre-cooling function according to claim 1, characterized in that: Heat exchanger 1 (5) includes three heat exchange channels. Channel 1 (13) is used for the refrigerant to pass through in the primary refrigeration circuit, channel 2 (14) is used for the refrigerant to pass through in the secondary refrigeration circuit, and channel 3 (15) is used to connect to the air inlet pipe (11) for air precooling.

3. A gas cooling system with pre-cooling function according to claim 2, characterized in that: The power of compressor 2 (6) is less than that of compressor 1 (1).

4. A gas cooling system with pre-cooling function according to claim 2, characterized in that: Heat exchanger 2 (10) includes two flow channels, one for the refrigerant of the secondary refrigeration circuit and the other for air.

5. A gas cooling system with pre-cooling function according to claim 1, 2, 3, or 4, characterized in that: Air flows out after passing through heat exchanger 1 (5) and heat exchanger 2 (10) in sequence from the inlet.

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