Compression heat exchange integrated device of compression card refrigeration system

Abstract

The application discloses a compression heat exchange integrated device of a compression card refrigerating system, which comprises a compression head, a plurality of metal pipes, compression card materials, a base and an outer thermal insulation layer, the metal pipes are uniformly distributed at equal intervals, the compression card materials are filled between the metal pipes and form a cylindrical body, the outer thermal insulation layer is wrapped outside the cylindrical body, the compression head and the base are respectively provided with first flow channels and second flow channels, a same number of limiting holes as the metal pipes are arranged below the first flow channels in the compression head, each limiting hole is in sealed connection with the upper end of one metal pipe, and the lower end of the metal pipe is communicated with the second flow channels. The application has higher efficiency.

Description

Technical Field

[0001] This invention relates to compression refrigeration technology, and more particularly to an integrated compression heat exchange device for a compression refrigeration system. Background Technology

[0002] Refrigeration technology is an indispensable technology in modern society, widely used in household appliances, industry, commerce, cold chain logistics, and transportation. Currently, vapor compression refrigeration technology is the most mature and widely applied refrigeration technology. However, a series of problems caused by liquid refrigerant leakage have been hindering the development of vapor compression refrigeration technology. Currently, no liquid refrigerant can fully meet all requirements regarding safety, ODP, GWP, and thermodynamic properties. Given the bottlenecks encountered in the development of liquid refrigerants, solid-state refrigeration technologies without refrigerant leakage risks, such as thermoelectric refrigeration, thermoacoustic refrigeration, adsorption refrigeration, and thermal effect refrigeration, are gradually attracting attention.

[0003] Thermal effect refrigeration technology, with its high theoretical efficiency, lack of application limitations, and minimal environmental impact, is considered one of the most promising solid-state refrigeration technologies. Currently, the main thermal effect refrigeration technologies include electric card refrigeration, magnetic card refrigeration, spring-loaded card refrigeration, and pressure card refrigeration. The first three thermal effect refrigeration technologies have a considerable theoretical and experimental foundation, but some unresolved challenges remain in their development and application. In contrast, although research on pressure card refrigeration technology started later, it offers a wider range of material choices, a simpler system drive, and avoids some of the problems encountered by the other three thermal effect refrigeration technologies. Therefore, pressure card refrigeration is one of the most promising alternative technologies to vapor compression refrigeration. However, current research on the compression heat exchange devices in pressure card refrigeration systems is limited, and their efficiency needs improvement. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a more efficient integrated compression and heat exchange device for a compression refrigeration system.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] An integrated compression heat exchange device for a compression refrigeration system includes a pressure head, several metal pipes, compression material, a base, and an outer insulation layer. The metal pipes are evenly distributed at equal intervals. The compression material fills the spaces between the metal pipes to form a cylindrical body. The outer insulation layer wraps around the outer layer of the cylindrical body. The pressure head and the base are respectively provided with a first flow channel and a second flow channel. The first flow channel in the pressure head has the same number of limiting holes as the metal pipes below it. Each limiting hole is sealed to the upper end of a metal pipe, and the lower end of the metal pipe communicates with the second flow channel.

[0007] Furthermore, the pressure-pressing material is made of 17% NPG, 68% TMP, and 15% graphene by weight.

[0008] Furthermore, the filling height of the pressure material is 200mm.

[0009] Furthermore, the external insulation layer includes a metal wall surface and thermally conductive insulation cotton.

[0010] Alternatively, the metal pipes can be distributed in a triangular, equally spaced pattern, meaning each metal pipe consists of three equally spaced adjacent metal pipes. The metal pipes can also be distributed in a square, meaning each metal pipe consists of four equally spaced adjacent metal pipes. Alternatively, the metal pipes can be distributed in a regular hexagonal, meaning each metal pipe consists of six equally spaced adjacent metal pipes.

[0011] Furthermore, the metal pipe is filled with a heat exchange fluid.

[0012] Furthermore, the filling rate of the pressure-pressing material is 20% to 40%.

[0013] A compression refrigeration system, the system comprising the above-mentioned integrated compression heat exchange device.

[0014] Compared with the prior art, the beneficial effects of this invention are:

[0015] (1) Unlike the four major components of a traditional vapor compression refrigeration system, this invention integrates the compression and heat exchange components into one unit, which greatly saves space and reduces the complexity of the system.

[0016] (2) The limiting hole design on the first flow channel allows the metal pipe to pass through the limiting hole, which not only ensures the sealing of the module, but also protects the mechanical properties of the metal pipe.

[0017] (3) The pressure-clamping material of the present invention has higher thermal conductivity, which improves heat exchange efficiency;

[0018] (4) The use of specific pipe laying methods and spacing between adjacent pipes for metal pipes greatly improves the utilization rate of space in the module. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the integrated compression heat exchange device of the compression refrigeration system provided in the embodiment of the present invention;

[0020] Figure 2 This is a graph showing the relationship between the filling rate of the compression molding material and the cooling rate.

[0021] Figure 3 This is a schematic diagram of different distribution patterns of metal pipes;

[0022] Figure 4 It is a graph showing the change in average temperature over time for clamping materials with different distribution patterns in metal pipes. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0024] This invention provides an integrated compression heat exchange device for a compression refrigeration system, such as... Figure 1 As shown, the device includes a pressure head 1, several metal pipes 2, clamping material 3, a base 4, and an outer insulation layer 5. The metal pipes 2 are evenly distributed at equal intervals, ensuring uniform heat dissipation. The clamping material fills the spaces between the metal pipes 2, forming a cylindrical shape. The outer insulation layer 5 wraps around the cylindrical body, specifically including a metal wall and thermally conductive insulation cotton, thereby reducing heat / cold loss. The pressure head 1 and base 4 are respectively provided with a first flow channel 6 and a second flow channel 7. Below the first flow channel 6 in the pressure head, there is the same number of limiting holes 8 as the metal pipes 2. Each limiting hole 8 is sealed to the upper end of a metal pipe 2, with the two fitting closely together to avoid axial pressure on the pipes and ensure sealing. The lower end of the metal pipes 2 communicates with the second flow channel 7, thus connecting the first flow channel 6, the metal pipes 2, and the second flow channel 7. The metal pipes 2 are filled with a heat exchange fluid for exchanging heat with the clamping material 3. The base 4 provides support and restraint for the clamping material 3. The three clamping materials are in contact with the outer insulation layer 5, the pressure head 1, the base 4, and the pipe wall, and are in a highly sealed state to ensure that the pressure they are subjected to is hydrostatic pressure.

[0025] The clamping material 3 is composed of 17% neopentyl glycol (NPG), 68% polyol TMP (trimethylolpropane), and 15% graphene, with a phase transition temperature of 10℃ and a thermal conductivity of 0.75 W·m⁻¹·K⁻¹. This results in a heat exchange capacity of 523.8 kW / m³ for the device. In contrast, existing clamping materials, made from 20% NPG, 75% TMP, and 5% graphene, only achieve a thermal conductivity of 0.4 W·m⁻¹. -1 ·K -1 Compared with existing technologies, the pressure-clamping material of the present invention has higher thermal conductivity and higher heat exchange efficiency and capacity.

[0026] The relationship between the filling rate of the compression molding material 3 and the cooling rate per unit volume is as follows: Figure 2 As shown, a filling rate of 20% to 40% for the pressing material 3 results in a higher cooling rate. Therefore, a filling rate of 20% to 40% for the pressing material 3 is preferred.

[0027] In practice, the metal pipes 2 can be arranged in various equidistant patterns, such as... Figure 3 As shown, the metal pipes can be distributed in a triangular pattern with equal spacing, meaning each metal pipe 2 consists of three equally spaced adjacent metal pipes 2. Alternatively, they can be distributed in a square pattern with equal spacing, meaning each metal pipe 2 consists of four equally spaced adjacent metal pipes 2. They can also be distributed in a regular hexagonal pattern with equal spacing, meaning each metal pipe 2 consists of six equally spaced adjacent metal pipes 2. The spacing between adjacent metal pipes is 9.2 mm, which can be extended radially, and the effective axial height (the part of the pipe in contact with the material) is 200 mm. The average temperature change of the pressure-clamping material over time for different distribution methods is shown below. Figure 4 As shown.

[0028] The working principle of this invention is as follows:

[0029] 1) The compression process includes: the pressure head 1 moves downward to transmit pressure to the clamping material 3. The clamping material 3 shrinks in volume due to the pressure of the pressure head 1 and the constraint of the outer insulation layer 5 and the base 4. Driven by the clamping effect, the temperature of the clamping material 3 rises. The metal pipe 2 located in the clamping material 3 passes through the limiting hole 8 in the pressure head 1 to form a seal on the clamping material 3 and is not subject to axial pressure.

[0030] 2) The cooling process includes: the cooling fluid flows into the metal pipe 2 through the first flow channel 6 in the pressure head 1 under the drive of external force, reduces the temperature of the pressure material 3, and then flows out from the second flow channel 7 in the base 4 to exchange heat with the outside.

[0031] 3) The pressure reduction process includes: the pressure head 1 moves upward to reduce the pressure transmitted to the clamping material 3, the clamping material expands in volume under the constraint of the pressure head 1, the outer insulation layer 5 and the base 4, and the temperature is further reduced under the drive of the clamping effect;

[0032] 4) The cooling process includes: the cooling fluid flows into the metal pipe 2 through the first flow channel 6 in the pressure head 1 under the drive of external force, and then exchanges heat with the pressure material 3 to remove the cold energy of the pressure material. Then it flows out from the second flow channel 7 in the base 4 to exchange heat with the outside and cool the outside.

[0033] This invention also provides a cassette refrigeration system, which includes the above-mentioned integrated compression heat exchange device and other necessary modules, thereby realizing cassette refrigeration. The other necessary modules are existing technologies and will not be described in detail here.

[0034] It should be understood that the embodiments and descriptions above are only the principles, main features and advantages of the present invention. Various changes and modifications can be made to the present invention without departing from the spirit and scope of the invention, and all such changes and modifications fall within the protection scope of the present invention.

Claims

1. A compression heat exchange integrated device for a compression refrigeration system, characterized in that: The device includes a pressure head (1), several metal pipes (2), clamping material (3), a base (4), and an outer insulation layer (5). The metal pipes (2) are evenly distributed at equal intervals. The clamping material (3) fills the space between the metal pipes (2) and forms a cylindrical body. The outer insulation layer (5) wraps around the outer layer of the cylindrical body. The pressure head (1) and the base (4) are respectively provided with a first flow channel (6) and a second flow channel (7). The pressure head (1) has the same number of limiting holes (8) as the metal pipes (2) below the first flow channel (6). Each limiting hole (8) is sealed to the upper end of a metal pipe (2). The lower end of the metal pipe (2) is connected to the second flow channel (7). The integrated compression heat exchanger achieves refrigeration through the following steps: 1) The compression process includes: the pressure head (1) moves downward to transmit pressure to the clamping material (3), the clamping material (3) shrinks in volume due to the pressure of the pressure head (1) and the constraint of the outer insulation layer (5) and the base (4), and the temperature of the clamping material (3) rises under the drive of the clamping effect. The metal pipe (2) located in the clamping material (3) passes through the limiting hole (8) in the pressure head (1) to form a seal on the clamping material (3) and is not subject to axial pressure. 2) The cooling process includes: the cooling fluid flows into the metal pipe (2) through the first flow channel (6) in the pressure head (1) under the drive of external force, reduces the temperature of the pressure material (3), and then flows out from the second flow channel (7) in the base (4) to exchange heat with the outside. 3) The pressure reduction process includes: the pressure head (1) moves upward to reduce the pressure transmitted to the pressure clamping material (3), the pressure clamping material expands in volume under the constraint of the pressure head (1), the outer insulation layer (5) and the base (4), and the temperature further decreases under the drive of the pressure clamping effect; 4) The cooling process includes: the cooling fluid flows into the metal pipe (2) through the first flow channel (6) in the pressure head (1) under the drive of external force, and then exchanges heat with the pressure material (3) to remove the cold energy of the pressure material. Then it flows out from the second flow channel (7) in the base (4) to exchange heat with the outside and cool the outside.

2. The integrated compression heat exchange device for the compression refrigeration system according to claim 1, characterized in that: The pressure-pressing material (3) is made of 17% NPG, 68% TMP and 15% graphene by mass.

3. The integrated compression heat exchange device for the compression refrigeration system according to claim 1, characterized in that: The filling height of the pressure material (3) is 200 mm.

4. The integrated compression heat exchange device for the compression refrigeration system according to claim 1, characterized in that: The external insulation layer (5) includes a metal wall and thermally conductive insulation cotton.

5. The integrated compression heat exchange device for the compression refrigeration system according to claim 1, characterized in that: The metal pipes (2) are distributed in a triangular pattern with equal spacing, that is, each metal pipe (2) consists of three adjacent metal pipes (2) with equal spacing.

6. The integrated compression heat exchange device for the compression refrigeration system according to claim 1, characterized in that: The metal pipes (2) are distributed in a square with equal spacing, that is, each metal pipe (2) consists of four equally spaced adjacent metal pipes (2).

7. The integrated compression heat exchange device for the compression refrigeration system according to claim 1, characterized in that: The metal pipes (2) are distributed in a regular hexagonal pattern with equal spacing, that is, each metal pipe (2) consists of six equally spaced adjacent metal pipes (2).

8. The integrated compression heat exchange device for the compression refrigeration system according to claim 1, characterized in that: The metal pipe (2) is filled with heat exchange fluid.

9. The integrated compression heat exchange device for the compression refrigeration system according to claim 1, characterized in that: The filling rate of the pressure material (3) is 20%~40%.

10. A pressure-cooling system, characterized in that, The system includes the integrated compression heat exchange device as described in any one of claims 1-9.

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