A fin, an evaporator, and a refrigeration system with circular radial heat dissipation

Abstract

The present invention relates to the field of refrigeration technology and provides a fin with circular radial heat dissipation. The fin includes a plurality of radial fins and one or more planar fins; the planar fin is circular ring-shaped. If there are multiple planar fins, each planar fin is parallel to each other, and the centers of each planar fin are on the same straight line; the radial fin is rectangular, and each radial fin is perpendicularly connected to the planar fin and extends along the radial direction of the planar fin or a direction deviating from the radial direction by a certain angle. The plurality of radial fins are evenly arranged to form a plurality of circular radial air ducts, so that the convection direction is 360-degree omnidirectional, which is beneficial to the heat dissipation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and particularly to a fin with circular radial heat dissipation and an evaporator including the fin. Background Art

[0002] The refrigeration principle of a general refrigerator: The function of the compressor is to compress the steam with a lower pressure into the steam with a higher pressure, reducing the volume of the steam and increasing the pressure. The compressor sucks in the working medium steam with a lower pressure coming out of the evaporator, raises its pressure and then sends it into the condenser. In the condenser, it condenses into a liquid with a higher pressure. After throttling through the throttle valve, it becomes a liquid with a lower pressure and is sent into the evaporator. In the evaporator, it absorbs heat and evaporates into steam with a lower pressure, and then is sent into the inlet of the compressor, thus completing the refrigeration cycle.

[0003] A system that uses external energy to transfer heat from a substance (or environment) with a lower temperature to a substance (or environment) with a higher temperature is called a refrigeration system. The refrigeration system mainly consists of a refrigerant and four major components, namely a compressor, a condenser, an expansion valve, and an evaporator.

[0004] The compressor is the power of the refrigeration cycle. It is driven by an electric motor and rotates continuously. Besides timely extracting the steam in the evaporator to maintain a low temperature and low pressure, it also increases the pressure and temperature of the refrigerant steam through compression, creating conditions for transferring the heat of the refrigerant steam to the external environmental medium. That is, it compresses the low-temperature and low-pressure refrigerant steam to a high-temperature and high-pressure state, so that normal-temperature air or water can be used as a cooling medium to condense the refrigerant steam.

[0005] The condenser is a heat exchange device. Its function is to use the environmental cooling medium (air or water) to take away the heat of the high-temperature and high-pressure refrigerant steam from the compressor, so that the high-temperature and high-pressure refrigerant steam is cooled and condensed into a high-pressure normal-temperature refrigerant liquid. It is worth mentioning that during the process of changing the refrigerant steam into the refrigerant liquid, the pressure remains unchanged and is still high pressure.

[0006] The evaporator is also a heat exchange device. The throttled low-temperature and low-pressure refrigerant liquid evaporates (boils) into steam in it, absorbing the heat of the substance to be cooled and lowering the temperature of the substance, achieving the purpose of freezing and refrigerating food. In an air conditioner, it cools the surrounding air to achieve the effects of cooling and dehumidifying the air. The lower the evaporation temperature of the refrigerant in the evaporator, the lower the temperature of the substance to be cooled. In a refrigerator, the evaporation temperature of the general refrigerant is adjusted to -26°C to -20°C, and in an air conditioner, it is adjusted to 5°C to 8°C.

[0007] A single-stage vapor compression refrigeration system consists of four basic components: a refrigeration compressor, a condenser, a throttle valve, and an evaporator. They are connected in sequence by pipes to form a closed system. The refrigerant continuously circulates in the system, undergoes state changes, and exchanges heat with the outside world.

[0008] After the liquid refrigerant absorbs the heat of the object to be cooled in the evaporator, it vaporizes into low-temperature and low-pressure steam, is sucked into the compressor, compressed into high-pressure and high-temperature steam, then discharged into the condenser, releases heat to the cooling medium (water or air) in the condenser, condenses into high-pressure liquid, is throttled by the throttle valve into low-pressure and low-temperature refrigerant, and then enters the evaporator again to absorb heat and vaporize, achieving the purpose of cyclic refrigeration. In this way, the refrigerant completes a refrigeration cycle through four basic processes: compression, condensation, throttling, and evaporation in the system.

[0009] The Chinese utility model patent application with the authorization number CN208312772U discloses a finned evaporator, including: a fixing component, a fin component, and an evaporation tube component; the fin component includes a plurality of fins, and each of the fins is arranged in parallel at intervals. "Research on Defrosting Control Technology of BCD-350W Air-cooled Refrigerator" also introduces a refrigerator evaporator. As Figure 1 shown, the fins 4 of this evaporator are also arranged in parallel at intervals on the tube bundle 5. The parallel and spaced arrangement of the fins 4 of the evaporator makes the heat dissipation channel have only a single direction, which is not conducive to the heat dissipation efficiency and uniformity.

[0010] The content in the background art section is only the technology known to the inventor and does not necessarily represent the prior art in this field. Summary of the Invention

[0011] Aiming at the problem of poor heat dissipation effect of the evaporator existing in the prior art, the present invention improves the fins of the evaporator so that the structure of the fins forms multiple heat dissipation channels and can quickly dissipate heat to the surroundings of the evaporator.

[0012] The present invention provides a fin with circular radial heat dissipation, and the fin includes a plurality of radial fins and one or more planar fins;

[0013] The planar fin is circular ring-shaped. If there are multiple planar fins, each planar fin is parallel to each other, and the centers of each planar fin are on the same straight line;

[0014] The radial fin is rectangular, and each radial fin is perpendicularly connected to the planar fin and extends along the radial direction of the planar fin or a direction deviating from the radial direction of the planar fin by a certain angle. The multiple radial fins are evenly arranged to form multiple radial air ducts.

[0015] Further, the radiation fins include long radiation fins and short radiation fins. The long radiation fins and the short radiation fins are arranged at intervals. The length of the short radiation fins is shorter than that of the long radiation fins, and the distance between the short radiation fins and the center of the planar fin is longer than the distance between the long radiation fins and the center of the planar fin.

[0016] Further, the size of the certain angle is greater than 0 degree and less than or equal to 60 degrees, and can be 30 degrees, 45 degrees or 60 degrees, etc. If the radiation fins extend in a direction at a certain angle deviating from the radius direction of the planar fin, forming a shape similar to a fan for the air duct, it is more conducive to heat dissipation.

[0017] Multiple radiation fins and planar fins form multiple circular radiation-shaped convection air ducts. The spacing between the planar fins and between the radiation fins is relatively large, forming relatively large convection air ducts. Arranging the long radiation fins and the short radiation fins at intervals can increase the convection air speed, thereby improving the temperature uniformity.

[0018] The present invention also provides an evaporator, which includes the above-mentioned fins with circular radiation-shaped heat dissipation and a coil pipe;

[0019] The coil pipe is a planar coil pipe or composed of multiple planar coil pipes. The planar coil pipe is formed by arranging strip-shaped pipes in a circular pattern on the same plane, and the two ends of the strip-shaped pipe are respectively provided with an inlet and an outlet;

[0020] The size of the planar fin is adapted to the size of the planar coil pipe, and the coil pipe is embedded in the fin.

[0021] Further, the planar coil pipes and the planar fins correspond one by one. Each planar coil pipe is in the same plane as a planar fin and is embedded in the planar fin.

[0022] Further, the number of strip-shaped pipes on the planar coil pipe is one or more, and the planar coil pipe is a mirror-symmetrical or axis-symmetrical structure. The number of strip-shaped pipes can be one, two or four. The pattern of the arrangement of the strip-shaped pipes makes the planar coil pipe a mirror-symmetrical or axis-symmetrical structure, as long as the evaporator dissipates heat evenly.

[0023] Furthermore, the pattern of each strip-shaped pipe is multiple fan-shaped rings, and adjacent fan-shaped rings are connected end to end in a U-shaped structure. If the number of strip-shaped pipes on each planar coil pipe is one, the pattern of each strip-shaped pipe is multiple rings, and adjacent rings are connected end to end in a U-shaped structure. If the number of strip-shaped pipes on each planar coil pipe is two, the pattern of each strip-shaped pipe is multiple semi-rings, and adjacent semi-rings are connected end to end in a U-shaped structure. If the number of strip-shaped pipes on each planar coil pipe is four, the pattern of each strip-shaped pipe is multiple fan-shaped rings, the central angle of each fan-shaped ring is 90 degrees, and adjacent fan-shaped rings are connected end to end in a U-shaped structure.

[0024] Further, the strip tube is a copper tube.

[0025] Further, the evaporator further includes a fan, and the fan is disposed at the inner circle of the flat fins, and the flat fins surround the fan. The fan is disposed at the inner circle of the fins, which can not only reduce the overall volume of the fan and the evaporator, but also accelerate the flow rate of the air in the air duct and improve the heat dissipation efficiency.

[0026] Furthermore, the fan is a centrifugal impeller or a propeller impeller. If the fan adopts a centrifugal impeller, the convection mode of the air is to enter from the inner circle of the fins and exit from the periphery; if the fan adopts a propeller impeller, the convection mode of the air is to enter from the periphery of the fins and exit from the inner circle.

[0027] The present invention also provides a refrigeration system, including the evaporator, a compressor, a condenser and a throttle valve.

[0028] The beneficial effects of the present invention are as follows:

[0029] The present invention designs annular fins. By combining flat fins and radiation fins, a plurality of circular radiation-shaped heat dissipation air ducts are formed, so that the convection direction is 360-degree omnidirectional, which is beneficial to the heat dissipation efficiency; the long radiation fins and the short radiation fins are arranged at intervals to accelerate convection and improve the temperature uniformity.

[0030] The evaporator made of the fins designed by the present invention has a small volume and is suitable for small spaces and circular spaces because the fan is designed inside the evaporator; since the fan is designed inside the evaporator, the convection of the air inside the evaporator is accelerated, thereby improving the temperature uniformity. Description of the Drawings

[0031] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0032] Figure 1 is a schematic structural view of the evaporator in the background art;

[0033] Figure 2 : a perspective view of the circular radiation-shaped heat dissipation fins;

[0034] Figure 3 is a structural view of the circular radiation-shaped heat dissipation fins;

[0035] Figure 4 is a perspective view of the evaporator of Embodiment 1A;

[0036] Figure 5 is a structural view of the evaporator of Embodiment 1A;

[0037] Figure 6 It is a perspective view of the coil 2;

[0038] Figure 7 It is a perspective view of the evaporator of Embodiment 2A;

[0039] Figure 8 It is a structural diagram of the evaporator of Embodiment 2A;

[0040] Among them, 1 - fin with circular radial heat dissipation, 11 - radiation fin, 111 - long radiation fin, 112 - short radiation fin, 12 - flat fin, 2 - coil, 21 - strip tube inlet, 22 - strip tube outlet, 3 - fan, 4 - fin, 5 - tube bundle. Detailed implementation manners

[0041] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0042] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0043] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0044] Embodiment 1A:

[0045] This embodiment shows an evaporator, as Figure 4 and Figure 5 shown, including a fin 1 with circular radial heat dissipation and a coil 2.

[0046] As Figure 2 and 3As shown in the figure, the fin 1 with circular radial heat dissipation includes 16 radial fins 11 and 2 planar fins 12; the planar fins 12 are circular rings, the two planar fins 12 are parallel to each other, and the centers of each planar fin 12 are on the same straight line. The radial fins 11 are rectangular, each radial fin 11 is perpendicularly connected to the planar fin 12, and extends along the radial direction of the planar fin 12 or a direction deviating from the radial direction by more than 0 degree and less than or equal to 60 degrees, which can be 30 degrees, 45 degrees or 60 degrees; the 16 radial fins 11 are respectively 8 long radial fins 111 and 8 short radial fins 112, the long radial fins 111 and the short radial fins 112 are arranged evenly and at intervals, the length of the short radial fin 112 is shorter than that of the long radial fin 111, and the distance between the short radial fin 112 and the center of the planar fin 12 is longer than the distance between the long radial fin 111 and the center of the planar fin 12. The two planar fins 12 and the 16 radial fins 11 form a plurality of circular radial air ducts. The spacing between the planar fins 12 and between the radial fins 11 is relatively large, forming a relatively large convection air duct. The long radial fins 111 and the short radial fins 112 arranged at intervals increase the convection air speed, thereby improving the temperature uniformity.

[0047] As Figure 6 shown in the figure, the coil 2 is composed of two planar coils, the planar coils are formed by arranging strip-shaped tubes on the same plane, there are two strip-shaped tubes on each planar coil, each strip-shaped tube is a copper tube, its pattern is composed of a plurality of semi-circular rings and adjacent semi-circular rings are connected end to end in a U-shaped structure, and a strip-shaped tube inlet 21 and a strip-shaped tube outlet 22 are respectively arranged at both ends of each strip-shaped tube; the two strip-shaped tubes form a circular pattern, making the planar coil an axisymmetric structure.

[0048] As Figure 4 and Figure 5 shown in the figure, the size of the planar fin 12 is adapted to the size of the planar coil, each planar coil corresponds to a planar fin 12 one by one, and the planar coil is on the same plane as a planar fin 12 and is embedded in the planar fin 12.

[0049] When the evaporator dissipates heat, the liquid enters the coil 2 through the strip-shaped tube inlet 21, flows along the annular pipeline and flows out of the coil 2 from the strip-shaped tube outlet 22; through the contact between the coil 2 and the fin 1 with circular radial heat dissipation, the heat in the liquid is transferred to the fin 1 with circular radial heat dissipation, and the heat flows out from the outer circumference or the inner circle of the evaporator through the air ducts formed by the planar fins 12 and the radial fins 11 in the fin 1 with circular radial heat dissipation, so as to achieve the effect of quickly converting heat.

[0050] Embodiment 1B:

[0051] This embodiment demonstrates a refrigeration system, which includes the evaporator, compressor, condenser, and throttle valve of Embodiment 1A. Due to the small volume of the evaporator, the volume of the entire refrigeration system is reduced.

[0052] Embodiment 2A:

[0053] This embodiment demonstrates an evaporator. The structure of this embodiment is basically the same as that of the evaporator in Embodiment 1A. The difference is that, as Figure 7 and Figure 8 shown, this embodiment has 2 more flat fins 12 than the flat fins 12 in Embodiment 1A, and the evaporator of this embodiment further includes a fan 3. The 2 additional flat fins 12 in this embodiment are respectively located on both sides of the coil 2, increasing the number of air ducts, which is beneficial to heat dissipation. The fan 3 uses a centrifugal impeller and is arranged at the inner circle of the flat fins 12. The flat fins 12 surround the fan 3. The rotation of the centrifugal impeller makes the air enter from the inner circle of the fins and exit from the periphery of the outer circle; this can not only reduce the overall volume of the fan 3 and the evaporator, but also accelerate the flow rate of the air in the air ducts and improve the heat dissipation efficiency.

[0054] Embodiment 2B:

[0055] This embodiment demonstrates a refrigeration system, which includes the evaporator, compressor, condenser, and throttle valve of Embodiment 1B. Due to the small volume of the evaporator and the need not to independently set a fan outside the evaporator separately, the volume of the entire refrigeration system is reduced.

[0056] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An evaporator, characterized in that, The evaporator includes fins and a coil pipe that dissipate heat in a circular and radial manner; The fins that dissipate heat in a circular and radial manner include a plurality of radial fins and one or more planar fins; The planar fins are circular rings. If there are multiple planar fins, each planar fin is parallel to each other, and the centers of each planar fin are on the same straight line; The radial fins are rectangular. Each radial fin is perpendicularly connected to the planar fin and extends along the radius direction of the planar fin or in a direction deviating from the radius direction of the planar fin by a certain angle. A plurality of radial fins are evenly arranged to form a plurality of radial air ducts; the size of the certain angle is greater than 0 degrees and less than or equal to 60 degrees; The coil pipe is a single planar coil pipe or composed of multiple planar coil pipes. The planar coil pipe is formed by arranging strip-shaped pipes in a circular pattern on the same plane. Inlets and outlets are respectively provided at both ends of the strip-shaped pipe; The size of the planar fin is adapted to the size of the planar coil pipe, and the coil pipe is embedded in the fin; 2. The evaporator according to claim 1, characterized in that, The radial fins include long radial fins and short radial fins. The long radial fins and the short radial fins are arranged at intervals. The length of the short radial fin is shorter than that of the long radial fin, and the distance between the short radial fin and the center of the planar fin is longer than the distance between the long radial fin and the center of the planar fin; 3. The evaporator according to claim 1, characterized in that, The planar coil pipes correspond to the planar fins one by one. Each planar coil pipe is on the same plane as a planar fin and is embedded in the planar fin; 4. The evaporator according to claim 1, wherein The number of strip-shaped pipes on each planar coil pipe is one or more, and the planar coil pipe is a mirror-symmetric or axis-symmetric structure; 5. The evaporator according to claim 3, characterized in that, The pattern of each strip-shaped pipe is a plurality of sector rings, and adjacent sector rings are connected end to end in a U-shaped structure; 6. The evaporator according to claim 1, characterized in that, It further includes a fan. The fan is arranged at the inner circle of the planar fin, and the planar fin surrounds the fan; 7. The evaporator according to claim 6, wherein The fan is a centrifugal impeller or a propeller impeller; 8. A refrigeration system, characterized in that, It includes the evaporator according to any one of claims 1-7, a compressor, a condenser, and a throttle valve.

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