Heat transfer plate and variable runner plate heat exchanger for geothermal heating
By designing heat transfer plates with uneven or equal cross-sectional flow guide areas, the problems of uneven medium flow resistance and high mold cost in traditional heat exchangers are solved, and more efficient medium flow is achieved and R&D costs are reduced.
Patent Information
- Application Number
- CN202421707822.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-18
AI Technical Summary
Traditional plate heat exchangers have problems of uneven resistance and high mold development costs when the medium is flowing, and are not conducive to the medium circulation distribution and equipment maintenance.
A heat transfer plate is designed, using a square plate body, setting the inlet and outlet of cold medium and heat medium, and setting the heat exchange zone and the flow guide zone on both sides of the plate. The corrugated depths of the flow guide zone are different, forming a heat receiving surface with different cross-sections or a heat receiving surface with equal cross-sections.
Through the design of different or equal cross-sections, the medium flow distribution is optimized, the flow resistance is reduced, the heat transfer efficiency is improved, and only one heat transfer plate mold and a sealing gasket mold are required, reducing R&D costs.
Smart Images
Figure CN222978655U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat transfer plate and a variable-flow-channel plate heat exchanger for geothermal heating. Background Art
[0002] Detachable plate heat exchangers have the characteristics of high heat transfer efficiency and easy cleaning and maintenance, and are widely used in the fields of heating ventilation and air conditioning, electric power, petrochemical, etc. Heat transfer plates and gaskets, as key parts of heat exchangers, are used to transfer heat between the cold and hot sides.
[0003] Traditional plate heat exchangers are generally divided into two types. One is an equal-section heat exchanger, that is, the medium flow channels on both sides are of equal cross-section; the other is an unequal-section heat exchanger, where the cross-sections of the medium flow channels on both sides are not equal. The medium with a large flow rate flows through the large-cross-section channel, and the medium with a small flow rate flows through the small-cross-section channel. And the cross-section inequality only applies to the heat transfer area of the heat transfer plate, and the flow guide area is still arranged according to the equal cross-section, which increases the resistance when the large-flow medium flows through the flow guide area and is not conducive to the distribution of the medium flow. In addition, the above heat exchangers all require at least two types of heat transfer plates and two types of gaskets to form the corresponding cross-section, which increases the mold development cost and is not conducive to equipment manufacturing and maintenance. Summary of the Utility Model
[0004] Therefore, the embodiments of the present utility model provide a heat transfer plate and a variable-flow-channel plate heat exchanger for geothermal heating to solve the above technical problems.
[0005] To achieve the above object, the embodiments of the present utility model provide the following technical solutions:
[0006] In a first aspect, a heat transfer plate includes a square plate body. A cold medium inlet and a cold medium outlet are respectively penetrated through two corners on the left side of the plate body, and a hot medium inlet and a hot medium outlet are respectively penetrated through two corners on the right side of the plate body;
[0007] Heat exchange areas are arranged in the middle of both sides of the plate body, and flow splitting areas are arranged at both ends of the heat exchange areas. Flow guide areas are arranged between the cold medium inlet and the flow splitting area, between the cold medium outlet and the flow splitting area, between the hot medium inlet and the flow splitting area, and between the hot medium outlet and the flow splitting area. A sealing groove is arranged in the area of the plate body surrounding the hot medium inlet, the hot medium outlet, the cold medium inlet, the cold medium outlet, the heat exchange area, the flow guide area and the flow splitting area.
[0008] Optionally, the flow guide area is a corrugation arranged on both sides of the plate body;
[0009] And the corrugation depths of the flow guide areas on both sides of the plate body are different.
[0010] Optionally, the heat exchange area is a corrugation arranged on both sides of the plate body;
[0011] And the corrugation depths of the heat exchange areas on both sides of the plate body are different.
[0012] Optionally, the corrugations in the heat exchange area include multiple corrugated regions, and the corrugation directions within each corrugated region are asymmetric corrugations.
[0013] Optionally, the depth of the sealing groove is equal to half of the corrugation depth of the heat exchange area.
[0014] Optionally, a sealing gasket adapted thereto is provided in the sealing groove.
[0015] In a second aspect, a variable-flow-channel plate heat exchanger for geothermal heating includes a frame and heat exchange plates installed on the frame, and the heat exchange plates adopt the above-mentioned heat transfer plate sheets.
[0016] The utility model has at least the following beneficial effects:
[0017] By setting different corrugation depths in the heat exchange areas on both sides of the heat transfer plate sheet and in the diversion area, when two adjacent heat transfer plate sheets are combined, unequal cross-section heating surfaces or equal cross-section heating surfaces are formed in both the heat exchange area and the diversion area, which can enable a large-flow medium to flow through the large cross-section channels in the diversion area and a small-flow medium to flow through the small cross-section channels in the diversion area, facilitating the distribution of the medium flow.
[0018] Moreover, only one heat transfer plate sheet mold and one sealing gasket mold are required to achieve two different combinations of flow channel cross-sections, reducing the R & D cost and being more adaptable to variable working conditions. Description of the Drawings
[0019] In order to more clearly illustrate the prior art and the present utility model, the drawings required for describing the prior art and the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings described below are only exemplary, and those of ordinary skill in the art can also obtain other drawings derived from the provided drawings without creative efforts.
[0020] The structures, ratios, sizes, etc. depicted in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.
[0021] Figure 1 Schematic diagram of the heat transfer plate sheet and the sealing gasket for an embodiment of the present utility model;
[0022] Figure 2 Cross-sectional view of the sealing groove of the heat transfer plate sheet according to an embodiment of the present utility model;
[0023] Figure 3 Cross-sectional view of the sealing groove of the heat transfer plate sheet and the installed sealing gasket according to an embodiment of the present utility model;
[0024] Figure 4 Cross-sectional view of the equal cross-section of the flow guiding area according to the present utility model;
[0025] Figure 5 Cross-sectional view of the unequal cross-section of the flow guiding area according to the present utility model;
[0026] Figure 6 Cross-sectional view of the equal cross-section flow channel in the heat exchange area according to the present utility model;
[0027] Figure 7 Cross-sectional view of the unequal cross-section flow channel in the heat exchange area according to the present utility model.
[0028] Explanation of reference numerals:
[0029] 1. Plate body; 2. Cold medium inlet; 3. Cold medium outlet; 4. Hot medium inlet; 5. Hot medium outlet; 6. Heat exchange area; 7. Flow guiding area; 8. Shunt area; 9. Sealing groove; 10. Corrugated area. Detailed implementation manners
[0030] In order to make the purpose, technical solutions and advantages of the present application clearer, the following further details the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0031] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. Terms such as "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present utility model and the above-mentioned drawings are intended to distinguish the objects being referred to. For a solution with a time sequence process, this way of term expression does not necessarily need to be understood as describing a specific order or sequence, and for a solution of a device structure, this way of term expression also does not distinguish the importance level, positional relationship, etc.
[0032] In addition, the terms "include", "have" and any of their variations are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units that have been clearly listed, but may also include other steps or units that are inherent to these processes, methods, products or devices although not clearly listed, or steps or units added based on further optimization solutions of the concept of the present utility model.
[0033] As shown Figures 1-7 in the figure, a heat transfer plate sheet and a heat exchanger disclosed by the present utility model are provided. A heat transfer plate sheet includes a square plate body 1. Cold medium inlets 2 and cold medium outlets 3 are respectively arranged through the two left corners of the plate body 1, and hot medium inlets 4 and hot medium outlets 5 are respectively arranged through the two right corners of the plate body 1;
[0034] Heat exchange areas 6 are arranged in the middle of both sides of the plate body 1, and flow splitting areas 8 are arranged at both ends of the heat exchange areas 6. Flow guiding areas 7 are arranged between the cold medium inlets and the flow splitting areas 8, between the cold medium outlets 3 and the flow splitting areas 8, between the hot medium inlets 4 and the flow splitting areas 8, and between the hot medium outlets 5 and the flow splitting areas 8. Sealing grooves 9 are arranged in the area of the plate body 1 surrounding the hot medium inlets 4, the hot medium outlets 5, the cold medium inlets 2, the cold medium outlets 3, the heat exchange areas 6, the flow guiding areas 7 and the flow splitting areas 8.
[0035] The above-mentioned plate body 1 is a rectangular plate-like structure, and its two relatively large opposite surfaces serve as heat exchange surfaces. Medium flow ports are arranged at the four corners of the heat exchange surfaces. In the figure, the upper left corner is the hot medium inlet 4, the lower left corner is the hot medium outlet 5, the upper right corner is the cold medium outlet 3, and the lower right corner is the cold medium inlet 2. A square heat exchange area 6 is arranged in the middle of the heat exchange surface. Flow guiding areas 7 are arranged between the heat exchange area 6 and the medium flow ports, and the flow guiding areas 7 are connected to the medium flow ports through the flow splitting areas 8 for the flow of the medium.
[0036] Furthermore, the flow guiding areas 7 are corrugations arranged on both sides of the plate body 1; and the corrugation depths of the flow guiding areas 7 on both sides of the plate body 1 are different.
[0037] The corrugated structures of the flow guiding areas 7 serve as medium flow channels to convey the medium. The corrugated structures of the flow guiding areas 7 on both sides of the plate body 1 may have the same depth or different depths, forming flow guiding areas 7 with equal cross-sections or unequal cross-sections. Different combinations can form different flow interfaces, enabling the medium to quickly form a uniform flow through the flow guiding areas 7 after passing through the hot medium inlets 4 and the cold medium inlets 2, uniformly entering the heat exchange areas 6, reducing heat transfer dead zones, optimizing flow resistance, and improving the utilization rate of the heat transfer area.
[0038] For example, when two adjacent heat transfer plates are combined, one is the first plate and the other is the second plate. On the first plate, the side with deeper corrugations in the flow guiding area 7 is surface A1, and the side with shallower corrugations is surface A2. On the second plate, the side with deeper corrugations in the flow guiding area 7 is surface A3, and the side with shallower corrugations is surface A4. When assembling a heat receiving surface with equal cross-sections, surface A1 is attached to surface A4 or surface A2 is attached to surface A3. In this way, the sizes of the medium flow channels formed by the heat receiving surfaces on both sides of the heat exchange plate are the same, which is a heat receiving surface with equal cross-sections. When assembling a heat receiving surface with unequal cross-sections, surface A1 is attached to surface A3, and surface A2 is attached to surface A4. In this way, the sizes of the medium flow channels formed by the heat receiving surfaces on both sides of the heat exchange plate are different, which is a heat receiving surface with unequal cross-sections.
[0039] Specific installation method: When the medium flow rates on both sides are close, the same type of heat transfer plate does not need to be turned over, and rotating it 180° up and down can form an equal cross-section assembly. When the flow rate difference between the two sides is large, the same type of heat transfer plate is turned over and rotated 180° forward and backward to form an unequal cross-section assembly, ensuring that the fluid medium has an appropriate flow rate inside the plate heat exchanger, enhancing the heat transfer performance, and only one type of heat transfer plate is required, reducing the R & D cost of the heat transfer plate mold.
[0040] Furthermore, the heat exchange area 6 is the corrugations provided on both sides of the plate body 1; and the corrugation depths of the heat exchange areas 6 on both sides of the plate body 1 are different.
[0041] According to the magnitudes of the flow rates on both sides, an equal cross-section assembly can be formed when the flow rates on both sides are close, and an unequal cross-section assembly can be formed when the flow rate difference between the two sides is large, ensuring that the fluid medium has an appropriate flow rate inside the plate and enhancing the heat transfer performance.
[0042] The corrugations of the heat exchange area 6 include multiple corrugated regions 10, and the corrugation directions within each corrugated region 10 are asymmetric corrugations.
[0043] It is easy to achieve uniform distribution of the medium in the channel, improve the effective utilization rate of the heat transfer area, enhance the heat exchange performance, and at the same time reduce the internal stress generated during the pressing process of the heat transfer plate, ensuring the flatness of the heat transfer plate. At the same time, it reduces the flow dead zone, improves the effective utilization rate of the heat transfer area, enhances the heat exchange performance, and at the same time reduces the internal stress generated during the pressing process of the heat transfer plate, ensuring the flatness of the heat transfer plate, and is conducive to equipment manufacturing and later maintenance.
[0044] The depth of the sealing groove 9 is equal to half of the corrugation depth of the heat exchange area 6.
[0045] During the equipment assembly process, both sides of the sealing groove 9 of the heat transfer plate are protected by the sealing gasket, the sealing gasket is evenly stressed, protecting the heat transfer plate from being deformed easily, extending the service life of the equipment, and being conducive to later maintenance.
[0046] A sealing gasket adapted to it is arranged in the sealing groove 9.
[0047] A variable-flow channel plate heat exchanger for geothermal heating, comprising a frame and heat exchange plates installed on the frame, wherein the heat exchange plates adopt the above-mentioned heat transfer plates.
[0048] The above several specific embodiments can be combined with each other, and for the same or similar concepts or processes, they may not be repeated in some embodiments.
[0049] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written out should also be considered to be within the scope described in this specification.
[0050] In the above text, the present invention has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be noted that, without departing from the concept of the present invention, it is obvious that several modifications and improvements can still be made to these specific embodiments, and these all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application shall be subject to the appended claims.
Claims
1. A heat transfer plate, characterized in that: It comprises a square plate body, wherein two left corners of the plate body are respectively provided with a cold medium inlet and a cold medium outlet, and two right corners of the plate body are respectively provided with a hot medium inlet and a hot medium outlet; A heat exchange area is provided in the middle of both sides of the plate body, and a diversion area is provided at both ends of the heat exchange area. A guide area is provided between the cold medium inlet and the diversion area, between the cold medium outlet and the diversion area, between the hot medium inlet and the diversion area, and between the hot medium outlet and the diversion area. A sealing groove is provided in the area surrounding the hot medium inlet, the hot medium outlet, the cold medium inlet, the cold medium outlet, the heat exchange area, the guide area and the diversion area on the plate body. The guide area is a corrugation provided on both sides of the plate body; and the corrugation depths of the guide areas on both sides of the plate body are different. The heat exchange area is a corrugation provided on both sides of the plate body; and the corrugation depths of the heat exchange areas on both sides of the plate body are different.
2. A heat transfer plate according to claim 1, characterized in that: The corrugations in the heat exchange zone include a plurality of corrugated areas, and the corrugation direction in each corrugated area is an asymmetric corrugation.
3. A heat transfer plate according to claim 1, characterized in that: The depth of the sealing groove is equal to half the depth of the corrugations in the heat exchange zone.
4. A heat transfer plate according to claim 1, characterized in that: A sealing gasket matched with the sealing groove is arranged in the sealing groove.
5. A variable flow plate heat exchanger for geothermal heating, comprising a frame and a heat exchange plate mounted on the frame, characterized in that: The heat exchange plate adopts the heat transfer plate according to claim 1.