Heat exchange system and refrigerator

Abstract

The heat exchange system (1) comprises a cold accumulation box (10) and a plurality of fins (13), the cold accumulation box comprises a box body, a cold accumulation agent and an inner heat exchanger (12) arranged in the box body, the cold accumulation agent is filled in the box body, at least one side wall of the box body forms a heat conduction plate (11), and the fins (13) are arranged in the heat conduction plate (11). The cold storage agent is used for releasing cold energy absorbed and stored from the inner heat exchanger so as to cool the heat conducting plate; the multiple fins are arranged on the outer surface of the heat conduction plate at intervals so as to form an air channel in the set direction. The utility model further discloses the refrigerator.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of refrigerator refrigeration, specifically, a heat exchange system and refrigerator. BACKGROUND

[0002] At present, there are two kinds of vehicle-mounted refrigerators, one is a semiconductor vehicle-mounted refrigerator relying on electronic chip refrigeration, and the other is a compressor vehicle-mounted refrigerator with low refrigeration temperature and high refrigeration efficiency.

[0003] The existing compressor vehicle-mounted refrigerator mostly adopts integrated common compressor, which will cause frequent start and stop of the compressor, reduce the service life of the compressor, therefore, the industry adopts cold storage technology, however, the vehicle-mounted refrigerator with cold storage function will have the problem of low heat exchange efficiency in the box.

[0004] Therefore, designing and optimizing the heat exchange system structure of the vehicle-mounted refrigerator, and improving the heat exchange efficiency of the cold storage refrigerator are urgent problems in the field. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving one of the technical problems in the related art to some extent, for this purpose, the utility model provides a heat exchange system and refrigerator.

[0006] In order to achieve the above purpose, as the first aspect of the application, the utility model discloses a heat exchange system, the heat exchange system includes a cold storage box and a plurality of fins, the cold storage box includes a box body, a cold storage agent and an internal heat exchanger arranged in the box body, the cold storage agent is filled in the box body, at least one side wall of the box body is formed into a heat conduction plate, the cold storage agent is used for releasing the cold storage capacity absorbed and stored from the internal heat exchanger to cool the heat conduction plate;

[0007] A plurality of the fins are arranged on the outer surface of the heat conduction plate in intervals to form an air duct along a set direction.

[0008] Further, a plurality of the fins are arranged in intervals along the set direction.

[0009] Further, the interval is between 1mm to 5mm.

[0010] Further, the length of the fin along the set direction is between 4mm to 35mm, and the thickness of the fin is between 0.1mm to 2mm.

[0011] Further, the projection of a plurality of the fins along the set direction has a comb tooth shape, and the gap between adjacent comb teeth is between 5mm to 10mm.

[0012] Further, the heat exchange system further comprises a shell, the shell is arranged on the surface of the heat conduction plate away from the box, to form a heat exchange space, the heat exchange space has a plurality of the fins, the heat exchange space has an air inlet and an air outlet, the heat exchange space is used for making the fluid entering from the air inlet pass through the fins to exchange heat and then flow out from the air outlet, the gap distance between the shell and the fins is between 0.5mm and 5mm.

[0013] Further, the air inlet and the air outlet are arranged on opposite sides of the shell along the set direction respectively, the heat exchange system further comprises a fan, the fan is arranged at the air outlet along the set direction, the fan is used for making the fluid enter from the air inlet and flow out from the air outlet.

[0014] Further, the inner heat exchanger comprises a coil pipe, a fin, an inlet and an outlet, two ports of the coil pipe are connected with the inlet and the outlet respectively, the fin is arranged on the outside of the coil pipe, the fin is used for transmitting the cold energy of the cooling medium entering the coil pipe from the inlet into the cold storage agent.

[0015] Further, the cold storage agent comprises a phase change material.

[0016] As a second aspect of the present application, a refrigerator is disclosed, the refrigerator comprises a heat exchange system and a refrigeration chamber, the heat exchange system is the heat exchange system described above, at least one side wall of the refrigeration chamber is provided with the heat conduction plate, the fins are arranged in the refrigeration chamber, and are used for heat exchange of air in the refrigeration chamber.

[0017] The heat exchange system provided by this invention has several advantages. First, it utilizes a refrigerant for heat exchange, eliminating the need for conventional compressor start-stop cooling. The refrigerant, after passing through the internal heat exchanger, absorbs and stores cold energy during off-peak hours. Compared to the cooling rate of ordinary heat exchangers, this cold energy is gradually and slowly released during subsequent external heat exchange, reducing energy consumption during peak hours and saving excessive cold energy waste. Second, the heat-conducting plate continuously transfers the cold energy released by the refrigerant to the fins, enabling efficient heat exchange between the fins and the air flowing through the duct, thus improving overall heat exchange efficiency. The fins effectively disrupt the boundary layer effect of the fluid in the duct, reducing fluid resistance and allowing more cold energy to be transferred to the fluid, reducing energy loss. Furthermore, the increased heat exchange area enhances the heat exchange effect between the fluid and the fins. Third, the entire system has a compact structure, achieving efficient heat exchange within a limited space. It is particularly suitable for vehicle refrigerators, with a simple structure that simplifies installation, use, and maintenance. The refrigerator using the heat exchange system of this application can store cold energy when the compressor is running and release the cold energy through its own cold storage refrigerant when the compressor stops to achieve the cooling effect. In addition, the refrigerator's air duct can be fully heated by the fins, which improves the heat exchange effect of the cold storage refrigerant, saves operating costs, reduces the frequency of compressor start-stop, and has a good cooling effect.

[0018] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Figure 1 An exploded view of one embodiment of the heat exchange system provided by this utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of one embodiment of the heat exchange system provided by this utility model;

[0022] Figure 3 This is a cross-sectional schematic diagram of one embodiment of the heat exchange system provided by this utility model;

[0023] Figure 4 This is a top view schematic diagram of one embodiment of the heat exchange system provided by this utility model;

[0024] Figure 5 This is a side view of one embodiment of the vehicle refrigerator provided by this utility model.

[0025] Explanation of reference numerals in the attached figures

[0026] 1: Heat exchange system; 10: Cold storage box; 11: Heat transfer plate; 12: Internal heat exchanger;

[0027] 13: Rib; 14: Outer casing; 15: Fan;

[0028] 101: Cover plate; 12a: Liquid inlet; 12b: Liquid outlet;

[0029] 121: Coil; 122: Fin;

[0030] 131: Substrate; 14a: Air inlet; 14b: Air outlet;

[0031] 2: Refrigeration compartment. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0033] The terms "an embodiment," "example," or "example" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this application. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0034] To achieve the above objectives, as the first aspect of this application, such as Figure 1 As shown, this utility model discloses a heat exchange system, which includes a cold storage box 10 and a plurality of fins 13. The cold storage box 10 includes a box body, a cold storage agent, and an internal heat exchanger 12 disposed in the box body. The cold storage agent is filled in the box body, and at least one side wall of the box body is formed as a heat-conducting plate 11. The cold storage agent is used to release the cold energy absorbed and stored from the internal heat exchanger 12 to cool the heat-conducting plate 11. The plurality of fins 13 are spaced apart on the outer surface of the heat-conducting plate 11 to form an air duct along a set direction.

[0035] In the heat exchange system provided by this utility model, firstly, a refrigerant heat exchange is used, which eliminates the need for conventional compressor start-stop cooling. After heat exchange through the internal heat exchanger 12, the refrigerant can absorb and store cold energy during off-peak hours. Compared to the cooling rate of ordinary heat exchangers, this cold energy can be gradually and slowly released during subsequent external heat exchange needs, reducing energy consumption during peak hours and saving excessive cold energy waste. Secondly, the heat-conducting plate 11 exchanges heat with the fluid in the air duct through multiple fins 13. The heat-conducting plate 11 can continuously conduct the cold energy released by the refrigerant to the fins 13, and the fins 13 can efficiently exchange heat with the air flowing through the air duct, improving the overall heat exchange efficiency. The fins 13 effectively break the boundary layer effect of the fluid in the air duct, reducing energy loss, and can also increase the heat exchange area, improving the heat exchange effect between the fluid and the fins 13. Thirdly, the entire system has a compact structure, achieving efficient heat exchange within a limited space, making it particularly suitable for vehicle refrigerators. The structure is simple, and the installation, use, and maintenance processes are also easier.

[0036] The fins 13 of this application can form air ducts, which, compared with other heat exchange systems, eliminates the need for additional air duct space, reduces the size of the air duct structure, and expands the storage chamber volume.

[0037] This application does not impose any special limitation on the position of the heat-conducting plate 11 in the body of the cold storage box 10. Since the cold storage box 10 is filled with a cold storage agent, when the cold storage agent releases its cold energy, it will be evenly released to the surrounding area of ​​the cold storage box 10. As a result, each surface of the cold storage box 10 can be cooled, so that the entire cold storage box 10 can exchange heat and cool the outside. For the sake of convenient installation and compact overall structure, it is preferable that a heat-conducting plate 11 is formed on one side wall of the box.

[0038] This application does not impose any special limitations on the shape of the fins 13, as long as they can transfer the cold energy of the heat-conducting plate 11. In some embodiments, the distribution of the fins 13 on the heat-conducting plate 11 forms an air duct for achieving air-cooled heat exchange. The fins 13 can also disrupt the boundary layer of the fluid in the air duct to achieve a turbulence effect. Therefore, the cross-section of the fins 13 can be rhomboid, triangular, teardrop-shaped, circular, needle-shaped, etc. Preferably, the fins 13 are plate-shaped heat exchange fins, which will not cause excessive flow resistance to the fluid and improve the fluid circulation frequency.

[0039] This application does not impose any special limitations on the distribution position of the fins 13 on the outer surface of the heat-conducting plate 11. The heat-conducting plate 11 only needs to be able to exchange heat and cool with the fluid in the air duct through the fins 13. When a conventional fluid flows in the air duct, the boundary layer thickness gradually increases on the solid wall surface. This leads to an increase in thermal resistance during convective heat transfer, a decrease in the heat transfer coefficient, and thus a reduction in heat transfer efficiency. The increased boundary layer thickness also increases the frictional resistance between the fluid and the solid wall surface, resulting in increased flow resistance and negatively impacting the fluid's flow characteristics. To counteract this increase in boundary layer thickness, preferably, multiple fins 13 are arranged at intervals along a predetermined direction. This alters the flow structure, causing the boundary layer of the fluid passing through the air duct to be disrupted by the periodically spaced fins 13.

[0040] Preferably, the narrow side of the fin 13 faces the designated direction, which allows air or other fluids to flow smoothly between the fins 13, increasing the contact area and contact time between the fluid and the surface of the fins 13, thereby improving heat exchange efficiency. As an optional implementation, such as... Figure 4 As shown, the multiple ribs 13 have a comb-like shape in their projection along a set direction, and the gap between adjacent comb teeth is between 5 mm and 10 mm, which further improves the fluid flowability.

[0041] Preferably, the spacing between the plurality of ribs 13 along the set direction is consistent. The ribs 13 arranged with consistent spacing can transfer the cold energy on the heat-conducting plate 11 to the fluid flowing through the air duct more evenly, avoiding local overcooling or overheating, and can guide the airflow to pass through the air duct more evenly, avoiding local poor heat exchange caused by uneven airflow.

[0042] Preferably, the spacing between the fins is between 1mm and 5mm. A reasonable fin spacing design can reduce pressure loss when airflow passes through the air duct and reduce the energy consumption required for system operation. Preferably, the length of the fins 13 along the set direction is between 4mm and 35mm, and the thickness of the fins 13 is between 0.1mm and 2mm. Fins 13 within this range have the best cooling and heat exchange effect.

[0043] As an optional implementation method, such as Figure 2 As shown, the heat exchange system also includes a housing 14, which covers the surface of the heat-conducting plate 11 on the side away from the housing to form a heat exchange space. The heat exchange space has a plurality of fins 13, an air inlet 14a and an air outlet 14b. The heat exchange space is used to allow fluid entering from the air inlet 14a to be heat-exchanged through the fins 13 and then flow out from the air outlet 14b. In order to facilitate installation and ensure that the main airflow passes through the fins 13, in some embodiments, a gap is left between the housing 14 and the fins 13. Preferably, the gap distance is between 0.5 mm and 5 mm.

[0044] As an optional implementation, the air inlet 14a and the air outlet 14b are respectively located on opposite sides of the outer casing 14 along a predetermined direction, such as... Figure 3 As shown, the heat exchange system also includes a fan 15, which is arranged in a set direction at the air outlet 14b. The fan 15 is used to allow fluid to enter from the air inlet 14a and flow out from the air outlet 14b.

[0045] As an optional implementation, the internal heat exchanger 12 includes a coil 121, fins 122, an inlet 12a and an outlet 12b. The two ends of the coil 121 are connected to the inlet 12a and the outlet 12b, respectively. The fins 122 are disposed on the outside of the coil 121. The fins 122 are used to transfer the cooling capacity of the cooling medium entering the coil 121 from the inlet 12a to the refrigerant.

[0046] As an optional implementation, the coolant includes a phase change material (PCM). PCM absorbs or releases a significant amount of latent heat during a phase change process (e.g., from solid to liquid or vice versa). Because the temperature of a PCM remains essentially constant during the phase change, it provides a stable cooling effect, avoiding excessive temperature fluctuations. PCM can store and release a large amount of heat within a relatively small temperature range, thereby increasing the system's energy density. PCM can continuously release cooling capacity over a longer period, extending the system's effective operating time and reducing the need for frequent start-ups and shutdowns. By storing cooling capacity during off-peak hours and releasing it when needed, energy consumption during peak hours is reduced, contributing to peak shaving and valley filling, and optimizing energy utilization.

[0047] As an optional implementation method, such as Figure 2 and Figure 3 As shown, the heat exchange system also includes a cover plate 101. In some embodiments, the refrigerant is a liquid, and the internal heat exchanger 12 is submerged in the refrigerant. To prevent refrigerant leakage or evaporation, preferably, the cover plate 101 is placed on top of the refrigerant tank 10 to cover it, thus preventing refrigerant leakage or evaporation. As an optional implementation, such as... Figure 2 and Figure 3 As shown, the heat exchange system also includes a substrate 131. To facilitate the processing of fins 13, fins 13 can be processed by welding, machining, or 3D printing technology. The substrate 131 serves as the processing base, and the fins 13 are processed and set on the surface of the substrate 131. The substrate 131 and the heat-conducting plate 11 are then fixedly connected by adhesive or other means.

[0048] As a second aspect of this application, a refrigerator is disclosed, as an optional implementation, such as Figure 5As shown, the refrigerator includes a heat exchange system and a refrigerator compartment 2. The heat exchange system is the one described above, used to cool the refrigerator compartment 2. At least one side wall of the refrigerator compartment is provided with a heat-conducting plate, and fins are disposed in the refrigerator compartment for heat exchange with the air in the refrigerator compartment. In some embodiments, the air inlet 14a and air outlet 14b of the heat exchange system are connected to the refrigerator compartment 2, allowing hot air from the refrigerator compartment 2 to enter the heat exchange system from the air inlet 14a, exchange heat with the fins 13, and then return to the refrigerator compartment 2 from the air outlet 14b.

[0049] The refrigerator using the heat exchange system of this application can store cold energy when the compressor is running and release the cold energy through its own cold storage refrigerant when the compressor stops to achieve the cooling effect. In addition, the refrigerator's air duct can be fully heated by the fins, which improves the heat exchange effect of the cold storage refrigerant, saves operating costs, reduces the frequency of compressor start-stop, and has a good cooling effect.

[0050] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A heat exchange system, characterized in that, The heat exchange system (1) includes a cold storage box (10) and a plurality of fins (13). The cold storage box includes a box body, a cold storage agent and an internal heat exchanger (12) disposed in the box body. The cold storage agent is filled in the box body. At least one side wall of the box body is formed as a heat-conducting plate (11). The cold storage agent is used to release the cold energy absorbed and stored from the internal heat exchanger to cool the heat-conducting plate. Multiple ribs are spaced apart on the outer surface of the heat-conducting plate to form an air duct along a set direction.

2. The heat exchange system according to claim 1, characterized in that, The ribs are arranged at intervals along the predetermined direction.

3. The heat exchange system according to claim 2, characterized in that, The interval is between 1 mm and 5 mm.

4. The heat exchange system according to claim 3, characterized in that, The rib has a length of 4 mm to 35 mm along the set direction and a thickness of 0.1 mm to 2 mm.

5. The heat exchange system according to claim 1, characterized in that, The projection of the plurality of ribs along the set direction has a comb-like shape, and the gap between adjacent comb teeth is between 5 mm and 10 mm.

6. The heat exchange system according to claim 1, characterized in that, The heat exchange system also includes a housing (14), which covers the surface of the heat-conducting plate away from the box body to form a heat exchange space. The heat exchange space has a plurality of fins, an air inlet and an air outlet. The heat exchange space is used to allow fluid entering from the air inlet to flow out from the air outlet after heat exchange through the fins. The gap between the housing and the fins is between 0.5 mm and 5 mm.

7. The heat exchange system according to claim 6, characterized in that, The air inlet and the air outlet are respectively located on opposite sides of the outer casing along the set direction. The heat exchange system also includes a fan, which is located at the air outlet along the set direction. The fan is used to allow fluid to enter from the air inlet and flow out from the air outlet.

8. The heat exchange system according to any one of claims 1 to 7, characterized in that, The internal heat exchanger includes a coil (121), fins (122), an inlet (12a) and an outlet (12b). The two ends of the coil are connected to the inlet and the outlet, respectively. The fins are disposed on the outside of the coil and are used to transfer the cooling capacity of the cooling medium entering the coil from the inlet to the refrigerant.

9. The heat exchange system according to any one of claims 1 to 7, characterized in that, The cold storage agent includes a phase change material.

10. A refrigerator, characterized in that, The refrigerator includes a heat exchange system and a refrigerator compartment. The heat exchange system is the heat exchange system according to any one of claims 1 to 9. At least one side wall of the refrigerator compartment is provided with the heat-conducting plate, and the ribs are disposed in the refrigerator compartment for exchanging heat with the air in the refrigerator compartment.

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