Cold storage sheet, cold storage type evaporator and vehicle-mounted air conditioning system

Abstract

The utility model provides a cold storage piece, a cold storage type evaporator and a vehicle-mounted air conditioning system. The cold storage piece comprises a first shell, a second shell and inner fins. The inner fin comprises a plurality of fin units, each fin unit comprises a plurality of protruding parts and a plurality of concave parts which are arranged at intervals, and the protruding parts and the concave parts form circulation spaces of the cold storage agent respectively; the multiple fin units are sequentially arranged in the width direction of the fin units, the protruding parts between every two adjacent fin units are arranged in a staggered mode, the multiple fin units are of an integrally-formed structure, the inner fins are fixed to the inner wall of the first shell or the inner wall of the second shell, and the first shell and the second shell are connected to form a coolant containing space. According to the cold accumulation sheet, the cold accumulation type evaporator and the vehicle-mounted air conditioning system, the cold accumulation and cold release effects are improved, and the structural strength is improved.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and in particular to a cold storage plate, a cold storage evaporator, and a vehicle air conditioning system. Background Technology

[0002] The automotive industry has developed a technology called "iStop" (Intelligent Idle Start-Stop), designed to reduce fuel consumption during driving, thereby achieving energy conservation and emission reduction goals. With the iStop system, the engine automatically shuts off instead of idling when the driver applies the brakes to bring the vehicle to a complete stop after starting. Since the air conditioning compressor is driven by the engine, the air conditioning system cannot continue to operate normally when the engine is turned off, leading to significant fluctuations in the interior temperature. To adapt to this new technology and maintain a relatively stable interior temperature, the regenerative evaporator has been developed. The regenerative evaporator adds regenerative fins to the normal refrigerant passage of a conventional evaporator. By charging these fins with a certain amount of regenerative energy storage medium (coolant), the fins can store cold air while the air conditioning is working normally and release it when the air conditioning stops, thus maintaining a relatively stable interior temperature and ensuring a comfortable environment.

[0003] In the process of developing this application, the inventors discovered at least the following problems in the prior art: the internal fin structure design of the existing cold storage plate is not reasonable. The internal fins conventionally adopt a rolled U-shaped fin shape structure, and each cold storage channel provided is a single strip design. This design not only has a small contact area between the cold storage and the internal fins, affecting the cold storage effect of the cold storage plate, but also the supporting effect of the internal fins on the shell of the cold storage plate is not very balanced, resulting in low overall structural strength of the cold storage plate. Summary of the Invention

[0004] Based on this, this application provides a cold storage plate, a cold storage evaporator, and a vehicle air conditioning system to improve the unreasonable design of the internal fins of the cold storage plate in the prior art, and to improve the cold storage and release effect and structural strength of the cold storage plate.

[0005] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a cold storage fin for a cold storage evaporator, comprising a first shell, a second shell, and inner fins; the inner fins include a plurality of fin units, each fin unit including a plurality of spaced protrusions and recesses, the protrusions and recesses respectively forming a flow space for the cold storage agent; the plurality of fin units are arranged sequentially along the width direction of the fin units, and the protrusions between each pair of adjacent fin units are staggered; the plurality of fin units are an integrally formed structure; the inner fins are fixed to the inner wall of the first shell or the second shell; the first shell and the second shell are connected to form a space for receiving the cold storage agent; the height of the protrusions corresponds to the distance between the inner walls of the first shell and the second shell.

[0007] In one embodiment, the outer surface of the cold storage plate is provided with a flow guiding structure, which is used to guide the condensate generated on the surface of the cold storage plate. The flow guiding structure is formed by the outward protrusion of the surfaces of the first shell and the second shell.

[0008] In one embodiment, the flow guiding structure includes a plurality of flow guiding units arranged at intervals. Each flow guiding unit includes a first inclined portion and a second inclined portion connected together. The first inclined portion and the second inclined portion are inclined downward from the connection point, forming flow channels for condensate on both sides of the flow guiding structure.

[0009] In one embodiment, the lower part of the cold storage plate is provided with a drainage groove, the upper opening of the drainage groove is positioned corresponding to the position of the flow channel, and the lower opening of the drainage groove is used to draw out the condensate flowing down from the cold storage plate.

[0010] In one embodiment, the upper part of the cold storage plate is provided with a filling port, and a filling port assembly is provided at the filling port. The filling port assembly includes a filling tube and a sealing post inserted in the filling tube. The filling tube includes an inner connecting section and an exposed section. The inner connecting section is located in the filling port and is sealed to the filling port. The end of the exposed section and the sealing post inside it are semi-circularly pinched together to seal the filling port.

[0011] In one embodiment, the first housing, the second housing, the inner fins, and the filling tube are all made of aluminum alloy.

[0012] Secondly, embodiments of this application provide a regenerative evaporator, including the regenerative fins described above.

[0013] In one embodiment, the regenerative evaporator further includes an upper manifold, a lower manifold, and a plurality of flat tubes disposed between the upper manifold and the lower manifold, wherein the regenerative fins are disposed between two adjacent flat tubes.

[0014] In one embodiment, the regenerative evaporator further includes external fins disposed between two adjacent flat tubes where no regenerative fins are provided.

[0015] Thirdly, embodiments of this application provide an in-vehicle air conditioning system, including the cold storage evaporator described above.

[0016] This application has at least the following beneficial effects: The cold storage fin provided by this application has internal fins formed by multiple fin units spaced apart. Each fin unit includes a protrusion formed by bending and deformation and an adjacent recess. The protrusions between two adjacent fin units are staggered, which also means that the recesses are staggered. That is, the flow channel of the cold storage refrigerant formed by the protrusions and recesses is not a single continuous channel, but is divided into two or more flow spaces by the plate of the fin unit. In this way, the contact area between the cold storage refrigerant and the internal fins when flowing in the cold storage fin is significantly increased, thereby enabling the cold storage refrigerant to diffuse more fully in the cold storage fin and improving the cold storage and release effect. At the same time, the staggered arrangement of the protrusions makes the distribution of the protrusions more uniform, improves the support capacity of the internal fins for the first shell and the second shell, and thus improves the overall structural strength of the cold storage fin. The cold storage evaporator and vehicle air conditioning system provided by this application include the above-mentioned cold storage fin, and therefore also have the above-mentioned beneficial effects. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a cold storage evaporator according to an embodiment of this application.

[0018] Figure 2 for Figure 1 A schematic diagram of the main structure of a cold storage evaporator.

[0019] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point A.

[0020] Figure 4 This is an exploded structural diagram of the cold storage plate according to an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the combined structure of two fin units of the inner fin in an embodiment of this application.

[0022] Figure 6 This is a schematic diagram of the front view structure of the inner fin in an embodiment of this application.

[0023] Figure 7 This is an exploded structural diagram of a housing and filling port assembly of a cold storage plate according to an embodiment of this application.

[0024] The meanings of the labels in the attached diagram are as follows:

[0025] 1. First manifold; 2. Second manifold; 3. Flat tube; 4. Third manifold; 5. Cooling fin; 51. Filling port assembly; 52. Inner fin; 521. Protrusion; 522. Recess; 53. First shell; 54. Second shell; 55. Filling port; 56. Flow guiding unit; 561. First inclined part; 562. Second inclined part; 57. Flow channel; 6. Outer fin; 7. Fourth manifold. Detailed Implementation

[0026] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the ways in which this application may be implemented. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] In the description of this application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Please see Figures 1 to 3The regenerative evaporator of this application embodiment includes an upper manifold and a lower manifold, and a plurality of flat tubes 3 disposed between the upper manifold and the lower manifold, with regenerative fins 5 disposed between two adjacent flat tubes 3. Specifically, the upper manifold includes a first manifold 1 and a second manifold 2 arranged in parallel, and the lower manifold includes a third manifold 4 and a fourth manifold 7 arranged in parallel. One of the first manifold 1 and the second manifold 2 is a refrigerant inlet pipe, and the other is a refrigerant outlet pipe. Several flat tubes 3 are arranged side-by-side between the first manifold 1 and the third manifold 4, with each flat tube 3 connected to both manifold 1 and 4, forming the first flow channel structure layer of the evaporator. Several more flat tubes 3 are arranged side-by-side between the second manifold 2 and the fourth manifold 7, with each flat tube 3 connected to both manifold 2 and 7, forming the second flow channel structure layer of the evaporator. The flow channels of the first and second flow channel structures are interconnected, and the positions of the flat tubes 3 in the first and second flow channel structures correspond one-to-one. Every two corresponding flat tubes 3 form a flat tube group. A cold storage fin 5 is located between two adjacent flat tube groups and contacts the flat tubes 3 on both sides. The upper surfaces of the third manifold 4 and the fourth manifold 7 are respectively provided with smooth slope structures on the opposite sides to facilitate the drainage of condensate flowing down from the flat tube 3 and the cold storage plate 5.

[0031] In this embodiment, the first manifold 1 and the second manifold 2 are arranged side-by-side at the top of the regenerative evaporator (all directions in this document are illustrated according to the orientation of the regenerative evaporator after installation and operation, i.e., the orientation shown in the diagram). The third manifold 4 and the fourth manifold 7 are located at the bottom of the regenerative evaporator and are arranged parallel to the first manifold 1 and the second manifold 2, respectively. When the first manifold 1 is the refrigerant inlet pipe, the refrigerant inlet of each flat tube 3 in the first flow channel structure layer is connected to the first manifold 1, and the refrigerant outlet of each flat tube 3 is connected to the third manifold 4. The refrigerant inlet of each flat tube 3 in the second flow channel structure layer is connected to the fourth manifold 7, and the refrigerant outlet of each flat tube 3 is connected to the second manifold 2. A cold storage plate 5 is provided between some adjacent two flat tube groups. The width of the cold storage plate 5 can be set to correspond to the width of the evaporator. The cold storage plate 5 is filled with cold storage refrigerant. An outer fin 6 is provided between some (or all) adjacent two flat tubes 3 or flat tube groups. The outer fin 6 is used to increase the heat dissipation area of ​​the flat tube 3.

[0032] Specifically, such as Figure 4 As shown, the heat storage fin 5 includes a first housing 53, a second housing 54, and inner fins 52. The inner fins 52 include multiple fin units (such as... Figure 5 As shown, these are two adjacent fin units, as... Figure 5 and Figure 6As shown, the fin unit includes several spaced-apart protrusions 521 and recesses 522, which respectively form flow spaces for the refrigerant. Multiple fin units are arranged sequentially along the width direction of the fin unit, with the protrusions 521 between adjacent fin units staggered. The multiple fin units are integrally formed, with the inner fins 52 fixed to the inner wall of the first housing 53 or the second housing 54. The first housing 53 and the second housing 54 are connected to form a refrigerant-containing space. The connection method of the first housing 53 and the second housing 54 can be, for example, a fixed connection. The height of the protrusions 521 corresponds to the distance between the inner walls of the first housing 53 and the second housing 54. For example, the height of the protrusions 521 can be made approximately equal to the distance between the inner walls of the first housing 53 and the second housing 54, thereby increasing the contact area between the inner fins 52 and the refrigerant, thus improving the cold storage and release effect of the refrigerant fin. The inner fin 52 is formed from aluminum alloy sheet by stamping or other forming methods, forming several protrusions 521 and recesses 522. The height of the protrusions 521 (that is, the height of the recesses 522) is almost equal to the distance between the two shells (the first shell 53 and the second shell 54). The protrusions 521 are evenly distributed on the inner fin 52, instead of being in a continuous strip as in the traditional process (that is, the position of the protrusions 521 of each fin unit is corresponding, and the position of the recesses 522 is also corresponding. Along the length or width direction of the inner fin, each row has only one integral protrusion 521 or recess 522, and there is no overlap between the protrusions 521. This structure has a weaker supporting effect on the corresponding shell at the recesses 522 of a continuous strip). This design enhances the supporting capacity of the shell and increases the overall structural strength of the shell. Meanwhile, the staggered protrusions 521 and recesses 522 allow the refrigerant inside the shell to diffuse and come into contact with it, increasing the contact area and effectively improving the efficiency of cold storage and release. The inner fins 52 can be fixed to the inner wall of a shell by welding. After the two shells are fastened together, they can be fixedly connected by welding to form a space for the refrigerant.

[0033] Specifically, for example, each fin unit can be designed with the same size specifications, and the protrusions 521 and recesses 522 can also be designed with the same size. The fin units can then be staggered. For instance, the protrusions 521 of a single row of fin units can be positioned correspondingly, and the protrusions 521 of a double row can be positioned correspondingly, with one side wall of the double row of protrusions 521 located in the middle of the two side walls of the single row of protrusions 521. Of course, other staggered positions can be used in other embodiments, as long as the positions of the protrusions 521 of adjacent rows of fin units are not exactly the same.

[0034] During operation, a regenerative evaporator produces condensate on its surface. If this condensate is not drained promptly, it can lead to evaporator malfunctions. For example, in low-temperature environments, accumulated water may cause some components to freeze, burst, and be damaged. Therefore, a flow-guiding structure can be installed on the surface of the shell to guide the condensate generated on the surface of the regenerative plate 5 and ultimately drain it out of the evaporator. The flow-guiding structure is formed by protruding outwards from the surfaces of the first shell 53 and the second shell 54. The flow-guiding structure protruding from the shell surface also increases the contact area between the regenerative refrigerant and the shell, making the regenerative plate 5 fit more closely to the flat tube 3, which to some extent helps to improve the regenerative and release effects. Because the flow-guiding structure protrudes from the shell surface, the regenerative plate 5 ultimately contacts the flat tubes 3 on both sides through the protruding flow-guiding structure.

[0035] Specifically, such as Figure 7 and Figure 3 As shown, in this embodiment, the flow guiding structure includes several spaced-apart flow guiding units 56. Each flow guiding unit 56 includes a first inclined portion 561 and a second inclined portion 562 connected together. The first inclined portion 561 and the second inclined portion 562 are inclined downwards from the connection point, forming condensate flow channels on both sides of the flow guiding structure. The connection point of the first inclined portion 561 and the second inclined portion 562 is smoothly transitioned, and the flow guiding unit 56 forms a structure similar to an inverted "V" shape, which has a high flow guiding capacity. Several flow guiding units 56 are arranged sequentially from top to bottom along the surface of the shell. The first inclined portion 561 and the second inclined portion 562 not only guide the condensate, but also, the integrated design of the two increases the contact area between the flow guiding structure and the flat tube 3, improving the efficiency of cold storage and cold release. A gas inlet and outlet channel is formed between two adjacent flow guiding units 56, reducing wind resistance and improving the heat exchange efficiency of the cold storage evaporator.

[0036] The lower part of the housing of the cold storage plate 5 is also provided with a drainage groove 57. The upper opening of the drainage groove 57 is set to correspond to the position of the guide channel, and the lower opening of the drainage groove 57 is used to draw out the condensate flowing down from the cold storage plate 5. In this embodiment, there are two drainage grooves 57, which are arranged vertically. The two drainage grooves 57 are respectively set to correspond to the positions of the guide channels for condensate formed on both sides of the guide structure.

[0037] like Figure 7As shown, a filling port 55 is provided at the upper part of the cold storage plate 5, and a filling port assembly 51 is provided at the filling port 55. The filling port assembly 51 includes a filling tube and a sealing post (not shown) inserted inside the filling tube. The filling tube includes an inner connecting section and an exposed section. The inner connecting section is located in the filling port 55 and is sealed to the filling port 55. The end of the exposed section and the sealing post inside it are in a semi-circular pinch shape to seal the filling port 55. The filling tube and the filling port 55 can be fixedly connected by welding, for example. During the manufacturing process of the cold storage plate 5, cold storage agent can be filled into the shell through the filling port 55. After the cold storage agent is filled, the filling tube and the sealing post inside it are pressed together by a clamping tool with a semi-circular cross section, so that the radial dimension of the end of the exposed section of the filling tube is smaller than that of the inner connecting section, forming a semi-circular pinch-shaped sealing structure. The semi-circular pinching sealing method can improve the sealing effect of the filling tube and effectively reduce the risk of leakage of the cold storage fin 5.

[0038] The main body of the cold storage plate 5 can be made entirely of aluminum alloy, including two shells, inner fins 52 and filling tube, while the sealing column is made of a sealing material with a certain degree of elasticity.

[0039] This application also provides a vehicle air conditioner, including the cold storage evaporator of the above embodiment, and may further include a compressor, a condenser and an expansion valve, wherein the flat tube 3 of the compressor, condenser, expansion valve and cold storage evaporator are sequentially connected to form a refrigerant circulation channel.

[0040] The cold storage fin, cold storage evaporator, and vehicle air conditioning system provided in this application embodiment optimize the external and internal structural design of the cold storage fin, making the shell of the cold storage fin fit more closely with the flat tube, thereby improving the cold storage and release efficiency. Its flow-guiding structure reduces the evaporator's air resistance, improves its heat exchange efficiency, and ensures that the condensate generated during evaporator operation can be smoothly guided out of the evaporator from the bottom drainage groove along the inclined edge of the flow-guiding structure on both sides under the action of gravity, avoiding damage to evaporator components due to water accumulation.

[0041] The inner fin structure of the cold storage plate in this embodiment adopts an offset design, which increases the contact area between the shell and the inner fin. The inner fin provides better support for the shell, ensuring the stability of the shape structure of the cold storage plate after high-temperature welding. At the same time, it also allows the cold storage agent to fully diffuse and contact with the shell, further improving the cold storage and release efficiency.

[0042] The cold storage plate in this application improves the sealing method of the injection tube by adopting a semi-circular pinching method, which effectively reduces the risk of leakage of the cold storage plate.

[0043] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0044] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cold accumulating sheet for a cold accumulating evaporator, characterized by, The accumulator includes a first shell, a second shell and an inner fin; the inner fin includes a plurality of fin units, each of which includes a plurality of spaced protrusions and recesses, the protrusions and the recesses forming flow spaces for the cold storage agent; the plurality of fin units are arranged in sequence along the width direction of the fin units, and the protrusions of each adjacent two fin units are staggered; the plurality of fin units are integrally formed, the inner fin is fixed to the inner wall of the first shell or the second shell, and the first shell and the second shell are connected to form a storage space for the cold storage agent.

2. The cold accumulator sheet of claim 1, wherein The outer surface of the accumulator is provided with a flow guide structure for guiding the condensed water generated on the surface of the accumulator, and the flow guide structure is formed by the surface of the first shell and the second shell.

3. The cold accumulator sheet of claim 2, wherein The flow guide structure includes a plurality of spaced flow guide units, each of which includes a first inclined portion and a second inclined portion arranged in connection, and the first inclined portion and the second inclined portion are inclined downward from the connection, respectively forming a flow guide flow channel for the condensed water on both sides of the flow guide structure.

4. The cold accumulator sheet of claim 3, wherein The lower part of the accumulator is provided with a drainage groove, the upper opening of the drainage groove is arranged corresponding to the position of the flow guide flow channel, and the lower opening of the drainage groove is used for guiding the condensed water flowing down the accumulator.

5. The cold accumulator sheet of claim 4, wherein The upper part of the accumulator is provided with a filling port, the filling port is provided with a filling port assembly, the filling port assembly includes a filling pipe and a sealing column inserted in the filling pipe; the filling pipe includes an inner connecting section and an exposed section, the inner connecting section is located in the filling port and is in sealing connection with the filling port, and the end of the exposed section is in a semicircular kneading shape with the sealing column inside for sealing the filling port.

6. The cold accumulator sheet of claim 5, wherein The first shell, the second shell, the inner fin and the filling pipe are respectively made of aluminum alloy material.

7. A regenerative evaporator characterized by The accumulator includes the accumulator according to any one of claims 1 to 6.

8. The regenerative evaporator of claim 7, wherein The accumulator further includes an upper header pipe, a lower header pipe and a plurality of flat tubes arranged between the upper header pipe and the lower header pipe, and the accumulator is arranged between two adjacent flat tubes.

9. The regenerative evaporator of claim 8, wherein The accumulator further includes an outer fin arranged between two adjacent flat tubes without the accumulator.

10. A vehicle air conditioning system, characterised in that, The accumulator includes the accumulator according to any one of claims 7 to 9.

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