A plate heat exchanger

Abstract

This disclosure proposes a plate heat exchanger, including plate heat exchange plates (12), a first fixed template (13) and a second fixed template (14), wherein multiple plate heat exchange plates (12) are sandwiched between the first fixed template (13) and the second fixed template (14), and also includes a plate heating element (4), wherein the plate heating element (4) is sandwiched between two adjacent plate heat exchange plates (12), one side of the plate heating element (4) is attached to the adjacent plate heat exchange plate (12), and the other side of the plate heating element (4) is attached to the adjacent plate heat exchange plate (12), and the plate heating element (4) heats two adjacent plate heat exchange plates (12) simultaneously; this plate heat exchanger is beneficial to improving energy efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, specifically a plate heat exchanger. Background Technology

[0002] Plate heat exchangers are frequently used in heating systems for heat exchange, and the exchange medium is diverse. One type is the electrically heated plate heat exchanger, such as the PTC semiconductor electrically heated plate heat exchanger disclosed in CN206847441U. This plate heat exchanger includes multiple plate bodies arranged and stacked sequentially to form a plate bundle. Each plate body has two corner holes on the same side, and parallel staggered mounting slots are located between these corner holes. A PTC semiconductor electric heater is installed in each mounting slot, and adjacent plate bodies are sealed with sealing gaskets. Although this electrically heated plate heat exchanger achieves the electric heating function, the need for multiple mounting slots on the plate bodies to install the PTC semiconductor electric heater significantly reduces the heat exchange area of ​​the plate bodies, which is detrimental to improving energy efficiency.

[0003] Therefore, this application proposes a plate heat exchanger that is beneficial to improving energy efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and propose a plate heat exchanger that is conducive to improving energy efficiency.

[0005] Compared with the prior art, this utility model proposes a plate heat exchanger, including plate heat exchange plates, a first fixed template and a second fixed template, with multiple plate heat exchange plates sandwiched between the first fixed template and the second fixed template, and also includes a plate heating element, which is sandwiched between two adjacent plate heat exchange plates. One side of the plate heating element is attached to the adjacent plate heat exchange plate, and the other side of the plate heating element is attached to the adjacent plate heat exchange plate. The plate heating element heats two adjacent plate heat exchange plates simultaneously.

[0006] Compared with the prior art, the present invention has the following advantages after adopting the above structure:

[0007] This disclosure eliminates the installation slot of the prior art by designing a plate heating element sandwiched between two adjacent plate heat exchange plates. The medium flowing through the plate heat exchange plates can quickly absorb heat from the plate heating element. This not only results in a large heat exchange area, but also a very short heat conduction distance due to the plate design, which is beneficial to heat exchange efficiency and thus improves energy efficiency. In addition, this disclosure also has the advantage of rapid heating.

[0008] In some embodiments, the sheet heating element is a flexible sheet heating element.

[0009] In some embodiments, the plate heat exchange plate includes a plate-shaped flow channel plate and a first plate-shaped cover plate. The plate-shaped flow channel plate has a first flow channel on its front side. The first plate-shaped cover plate is stacked and connected to the front side of the plate-shaped flow channel plate so that the first plate-shaped cover plate covers the first flow channel to form a first flow channel. The plate-shaped heating element located on the front side of the plate-shaped flow channel plate is attached to the outer side of the first plate-shaped cover plate and covers the area of ​​the outer side corresponding to the first flow channel.

[0010] In some embodiments, the plate heat exchange plate further includes a second plate cover plate, and the plate flow channel plate is provided with a second flow channel on its rear side. The second plate cover plate and the rear side of the plate flow channel plate are stacked and connected so that the second plate cover plate covers the second flow channel to form a second flow channel. The plate heating element located on the rear side of the plate flow channel plate is attached to the outer side of the second plate cover plate and covers the area of ​​the outer side corresponding to the second flow channel.

[0011] In some embodiments, two adjacent plate heat exchange plates share a single plate cover.

[0012] In some embodiments, the first flow channel and the second flow channel are arranged alternately and sequentially, and adjacent first flow channels and second flow channels share adjacent sides.

[0013] In some embodiments, the first flow channel and the second flow channel are both labyrinth channels that extend in an S-shape along the length of the sheet-like flow channel plate.

[0014] In some embodiments, the sheet-like flow channel plate has a medium inlet and an outlet respectively on the front and rear sides of the sheet-like flow channel plate at one end in the longitudinal direction.

[0015] In some embodiments, a first through hole is provided at the inlet of the plate-shaped flow channel plate. The medium enters the first flow channel through the first through hole and the inlet on the front side. The medium enters the second flow channel through the first through hole and the inlet on the rear side. A second through hole is provided at the outlet of the plate-shaped flow channel plate. The medium flows out of the first flow channel through the outlet on the front side and the second through hole. The medium flows out of the second flow channel through the outlet on the rear side and the second through hole. When the first fixed template, multiple plate-shaped heat exchange plates, and the second fixed template are sequentially stacked and connected, the first through hole and the second through hole penetrate each plate-shaped heat exchange plate and penetrate the first fixed template and / or the second fixed template along the thickness direction of the plate heat exchanger.

[0016] In some embodiments, the plate heat exchange plate, the plate heating element, the first fixing template and the second fixing template are all arranged vertically to form a vertical plate heat exchanger, and the plate heat exchanger also includes a base connected to the lower end of the plate heat exchanger. The base is used to vertically install the plate heat exchanger, and the lower end of the plate heat exchanger is provided with the first through hole and the second through hole. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the front side of a plate heat exchanger disclosed herein.

[0018] Figure 2 This is a three-dimensional schematic diagram of the rear side of a plate heat exchanger disclosed herein.

[0019] Figure 3 This is a three-dimensional schematic diagram of the front side of a plate heat exchanger after the first fixed template has been removed.

[0020] Figure 4 for Figure 3 The first sheet cover is removed to reveal a three-dimensional view of the front side of the sheet-like flow channel plate.

[0021] Figure 5 for Figure 3 Based on this, the front plate heat exchange plate is further removed to show a three-dimensional view of the front side of the plate heating element sandwiched therein.

[0022] Figure 6 This is a three-dimensional schematic diagram of the rear side of a plate heat exchange plate after it is attached to and connected to a plate heating element.

[0023] Figure 7 This is a three-dimensional schematic diagram of the front side of a plate heat exchange plate after it is attached to and connected to a plate heating element.

[0024] Figure 8 This is a three-dimensional schematic diagram of the front side of a sheet-like flow channel plate disclosed herein.

[0025] Figure 9 This is a three-dimensional schematic diagram of the rear side of a sheet-like flow channel plate disclosed herein.

[0026] Figure 10 This is a three-dimensional schematic diagram of the inner side of a first sheet-like cover plate disclosed herein.

[0027] Figure 11 This is a three-dimensional schematic diagram of a sealing ring disclosed herein.

[0028] Figure 12 This is a front view of the front side of a sheet-like flow channel plate disclosed herein.

[0029] Figure 13 This is a sectional view along axis AA.

[0030] Explanation of reference numerals in the attached drawings: 1-plate-shaped flow channel plate, 2-first plate-shaped cover plate, 3-first flow channel, 4-plate-shaped heating element, 5-second plate-shaped cover plate, 6-second flow channel, 7-side, 8-inlet, 9-outlet, 10-first through hole, 11-second through hole, 12-plate-shaped heat exchange plate, 13-first fixing template, 14-second fixing template, 15-base, 16-positioning groove, 17-bolt. Detailed Implementation

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The embodiments described below are merely examples, and other obvious variations will arise for those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, the above terms should not be construed as limitations on this utility model.

[0033] like Figures 1 to 13 As shown, this disclosure proposes a plate heat exchanger, including plate heat exchange plates 12, a first fixed template (13) and a second fixed template 14, with multiple plate heat exchange plates 12 sandwiched between the first fixed template (13) and the second fixed template 14, and also including a plate heating element 4, which is sandwiched between two adjacent plate heat exchange plates 12. One side of the plate heating element 4 is attached to the adjacent plate heat exchange plate 12, and the other side of the plate heating element 4 is attached to the adjacent plate heat exchange plate 12. The plate heating element 4 heats two adjacent plate heat exchange plates 12 at the same time.

[0034] In some embodiments, the sheet heating element 4 is a flexible sheet heating element 4. This allows the sheet heating element 4 to be better attached to the two adjacent sheet heat exchange plates 12, resulting in a better fit. For example, the sheet heating element 4 can be a flexible thin-film electric heating device. The flexible thin-film electric heating device can adopt existing technology, such as an electric heating sheet, which is a soft and flexible thin-film electric heating device. This electric heating sheet is formed by evenly distributing a foil-shaped or filamentous metal heating element between glass fiber cloth coated with high-temperature resistant silicone rubber, and then molding it at high temperature. It is thin, lightweight, heats up quickly when energized, and has the characteristics of large heating surface, uniform heating, weather resistance, corrosion resistance, environmental friendliness, flame retardancy, convenient installation, long service life, and high insulation strength. Therefore, because the main raw material of the electric heating sheet is silicone rubber, it is also called a "silicone rubber electric heating sheet".

[0035] It should be noted that the sheet heating element 4 is not limited to any particular structure. Any sheet-shaped heating element 4 that is suitable can be used in this patent. For example, the sheet heating element 4 can be a flexible alloy heating wire or a thick film heating sheet.

[0036] In some embodiments, such as Figures 7 to 13 As shown, this disclosure proposes a plate-shaped heat exchange plate, which includes a plate-shaped flow channel plate 1 and a first plate-shaped cover plate 2. The plate-shaped flow channel plate 1 has a first flow channel 3 on its front side. The first plate-shaped cover plate 2 is stacked and connected to the front side of the plate-shaped flow channel plate 1 so that the first plate-shaped cover plate 2 covers the first flow channel 3 to form a first flow channel. The plate-shaped heating element 4 located on the front side of the plate-shaped flow channel plate 1 is attached to the outer side of the first plate-shaped cover plate 2 and covers the area of ​​the outer side corresponding to the first flow channel.

[0037] Thus, this disclosure achieves a sheet heating scheme by designing a sheet-like heating element 4 that is attached to the outer side of the first sheet-like cover plate 2 and covers the area of ​​the outer side corresponding to the first flow channel. Furthermore, the first sheet-like cover plate 2 and the front side of the sheet-like flow channel plate 1 are stacked and connected so that the first sheet-like cover plate 2 covers the first flow channel 3 to form the first flow channel. Since there is a large coverage area between the sheet-like heating element 4 and the outer side of the first sheet-like cover plate 2, and the inner side of the first sheet-like cover plate 2 is the first flow channel 3, the medium flowing in the first flow channel 3 can quickly absorb the heat conducted from the first sheet-like cover plate 2. Not only is the heat exchange area large, but the distance is also very close, which is beneficial to the heat exchange efficiency and thus further improves energy efficiency.

[0038] In this example, the sheet-like flow channel plate 1, the first sheet-like cover plate 2, the sheet-like heating element 4, the first fixed template (13) and the second fixed template 14 all adopt a rectangular sheet-like structure, and the first flow channel 3 is a labyrinth groove that extends in an S-shape along the length direction of the sheet-like flow channel plate 1.

[0039] like Figure 7 As shown, the sheet-shaped heating element 4 has a large area, completely covering the area of ​​the first sheet-shaped cover plate 2 corresponding to the first flow channel.

[0040] In some embodiments, such as Figure 6 , 7 As shown in Figure 9, the plate heat exchanger 12 also includes a second plate cover 5. A second flow channel 6 is provided on the rear side of the plate flow channel plate 1. The second plate cover 5 is stacked and connected to the rear side of the plate flow channel plate 1 so that the second plate cover 5 covers the second flow channel 6 to form a second flow channel. The plate heating element 4 located on the rear side of the plate flow channel plate 1 is attached to the outer side of the second plate cover 5 and covers the area of ​​the outer side corresponding to the second flow channel. The second plate cover 5 is also rectangular. Thus, the provision of the second flow channel helps to increase the flow rate of the lifting medium.

[0041] Furthermore, in order to make it thinner, two adjacent plate heat exchange plates 12 share a plate cover. That is, this shared plate cover serves as the second plate cover 5 for the adjacent front plate heat exchange plate 12, and as the first plate cover 2 for the adjacent rear plate heat exchange plate 12.

[0042] In some embodiments, such as Figure 13 As shown, the first flow channel 3 and the second flow channel 6 are arranged alternately and sequentially, and adjacent first flow channels 3 and second flow channels 6 share adjacent side portions 7. In this way, on the one hand, the first flow channels 3 and the second flow channels 6 are close to each other, with a compact structure, which is conducive to heat exchange; on the other hand, it is conducive to manufacturing the first flow channels 3 and the second flow channels 6 with roughly the same height along the front and back direction of the plate-shaped flow channel plate 1, which is conducive to making them thinner. Making them thinner also allows the plate-shaped heating element 4 to better heat the medium in the first flow channel and the second flow channel simultaneously.

[0043] For better heat exchange, such as Figure 9 As shown, the second flow channel 6 is also configured as a labyrinth channel extending in an S-shape along the length of the sheet-like flow channel plate 1.

[0044] In some embodiments, such as Figure 8 , 9 As shown in Figure 13, the plate-shaped flow channel 1 has a medium inlet 8 and an outlet 9 respectively on its front and rear sides at one end along its length. This is beneficial for extending the first and second flow channels.

[0045] like Figure 1 , 2As shown in 3, 4, 5, 6, 7, 8, 9, and 13, a first through hole 10 is provided at the inlet 8 of the plate-shaped flow channel plate 1. The medium enters the first flow channel 3 through the first through hole 10 and the inlet 8 on the front side. The medium enters the second flow channel 6 through the first through hole 10 and the inlet 8 on the rear side. A second through hole 11 is provided at the outlet 9 of the plate-shaped flow channel plate 1. The medium flows out of the first flow channel 3 through the outlet 9 on the front side and the second through hole 11. The medium flows out of the second flow channel 6 through the outlet 9 on the rear side and the second through hole 11. When the first fixed template (13), multiple plate-shaped heat exchange plates 12, and the second fixed template 14 are sequentially stacked and connected, the first through hole 10 and the second through hole 11 penetrate each plate-shaped heat exchange plate 12 along the thickness direction of the plate heat exchanger and penetrate the first fixed template (13) and / or the second fixed template 14. In this way, the structure is simple and compact on the one hand, and it is convenient to assemble into a medium inlet pipe and a medium outlet pipe on the other hand. That is, the first fixed template (13), each plate heat exchange plate 12 and the second fixed template 14 are stacked and connected in sequence to form the first through hole 10 and the second through hole 11.

[0046] In this example, the first through hole 10 and the second through hole 11 penetrate each plate heat exchange plate 12 and the first fixed template (13) along the thickness direction of the plate heat exchanger, so that the second fixed template 14 serves as the bottom of the first through hole 10 and the second through hole 11, thereby further simplifying the structure.

[0047] To guide the medium through the first through hole 10 and inlet 8 into the sheet-like flow channel plate 1, and similarly, to guide the medium out of the sheet-like flow channel plate 1 through outlet 9 and second through hole 11, a sealing ring is provided between the first sheet-like cover plate 2 and the front side of the sheet-like flow channel plate 1, such as... Figure 11 The image shows a sealing ring with an open design on the side of the first through hole 10 facing the inlet 8 and the side of the second through hole 11 facing the outlet 9, thereby guiding the medium through the first through hole 10 and the inlet 8 into the sheet-like flow channel plate 1. Similarly, the sealing ring guides the medium through the outlet 9 and the second through hole 11 to flow out of the sheet-like flow channel plate 1.

[0048] To better prevent leaks, such as Figure 11 The sealing ring shown also extends along the periphery of the first flow channel; similarly, the sealing ring can also be provided in the second flow channel.

[0049] In some embodiments, such as Figure 1 , 2As shown in Figures 3, 4, and 5, the plate heat exchange plate 12, the plate heating element 4, the first fixed template (13), and the second fixed template 14 are all arranged vertically to form a vertical plate heat exchanger. It also includes a base 14, which is connected to the lower end of the plate heat exchanger. The base 14 is used for vertically mounting the plate heat exchanger, and the lower end of the plate heat exchanger is provided with the first through hole 10 and the second through hole 11. This results in a more compact structure. Furthermore, it facilitates the connection of the pipelines to the side near the base 14, thus avoiding the pipelines being suspended at a high position, thereby optimizing the pipeline layout. The pipelines include an inlet pipe and an outlet pipe. The inlet pipe is connected to the first through hole 10, and the outlet pipe is connected to the second through hole 11.

[0050] In some embodiments, such as Figure 3 , 4 As shown in Figure 6, in order to stack and assemble the plate heat exchange plates 12 more accurately, the plate heat exchange plates 12 are provided with positioning grooves 16 at both the upper and lower ends. By inserting positioning pins into the positioning grooves 16, the plate heat exchange plates 12 are stacked and assembled together more accurately. The clamping and fixing are achieved by connecting and fixing the first fixing template (13) and the second fixing template 14 with bolts 17, thereby clamping and fixing each plate heat exchange plate 12 with the first fixing template (13) and the second fixing template 14, while simultaneously clamping and fixing the plate heating element 4.

[0051] It should be noted that this disclosure does not require that each pair of adjacent plate heat exchange plates 12 be sandwiched with a plate heating element 4. The plate heating element 4 can be flexibly added or removed according to the need to increase or decrease the heating power.

[0052] When understanding this disclosure, the above structure may be referred to other embodiments / appendices if necessary. Figure 1 And that's understood, so I won't go into details here.

[0053] The above description is merely an illustrative embodiment of this utility model. Therefore, all equivalent changes or modifications made to the structure, features, and principles described in the scope of protection of this utility model are included within the scope of protection of this utility model.

Claims

1. A plate heat exchanger, comprising plate-shaped heat exchange plates (12), a first fixed template (13) and a second fixed template (14), wherein multiple plate-shaped heat exchange plates (12) are sandwiched between the first fixed template (13) and the second fixed template (14), characterized in that, It also includes a sheet heating element (4), which is sandwiched between two adjacent sheet heat exchange plates (12). One side of the sheet heating element (4) is attached to the adjacent sheet heat exchange plate (12), and the other side of the sheet heating element (4) is attached to the adjacent sheet heat exchange plate (12). The sheet heating element (4) heats the two adjacent sheet heat exchange plates (12) at the same time.

2. The plate heat exchanger as described in claim 1, characterized in that, The sheet heating element (4) is a flexible sheet heating element (4).

3. The plate heat exchanger as described in claim 1 or 2, characterized in that, The plate heat exchange plate (12) includes a plate flow channel plate (1) and a first plate cover plate (2). The plate flow channel plate (1) has a first flow channel (3) on its front side. The first plate cover plate (2) is stacked and connected to the front side of the plate flow channel plate (1) so that the first plate cover plate (2) covers the first flow channel (3) to form a first flow channel. The plate heating element (4) located on the front side of the plate flow channel plate (1) is attached to the outer side of the first plate cover plate (2) and covers the area of ​​the outer side corresponding to the first flow channel.

4. The plate heat exchanger as described in claim 3, characterized in that, The plate heat exchange plate (12) also includes a second plate cover plate (5). The plate flow channel plate (1) is provided with a second flow channel (6) on its rear side. The second plate cover plate (5) and the rear side of the plate flow channel plate (1) are stacked and connected so that the second plate cover plate (5) covers the second flow channel (6) to form a second flow channel. The plate heating element (4) located on the rear side of the plate flow channel plate (1) is attached to the outer side of the second plate cover plate (5) and covers the area of ​​the outer side corresponding to the second flow channel.

5. The plate heat exchanger as described in claim 4, characterized in that, Two adjacent plate heat exchange plates (12) share a single plate cover.

6. The plate heat exchanger as described in claim 4, characterized in that, The first flow groove (3) and the second flow groove (6) are arranged alternately in sequence, and the adjacent first flow groove (3) and the second flow groove (6) share the adjacent side (7).

7. The plate heat exchanger as described in claim 6, characterized in that, Both the first flow groove (3) and the second flow groove (6) are labyrinth grooves that extend in an S-shape along the length of the sheet-like flow groove plate (1).

8. The plate heat exchanger as described in claim 4, characterized in that, The plate-shaped flow channel (1) has a medium inlet (8) and an outlet (9) respectively on the front and rear sides of the plate-shaped flow channel (1) at one end of its length direction.

9. The plate heat exchanger as described in claim 8, characterized in that, A first through hole (10) is provided at the inlet (8) of the plate-shaped flow channel plate (1). The medium enters the first flow channel (3) through the first through hole (10) and the inlet (8) on the front side. The medium enters the second flow channel (6) through the first through hole (10) and the inlet (8) on the rear side. A second through hole (11) is provided at the outlet (9) of the plate-shaped flow channel plate (1). The medium flows out of the first flow channel (3) through the outlet (9) on the front side and the second through hole (11). The medium flows out of the second flow channel (6) through the outlet (9) on the rear side and the second through hole (11). When the first fixed template (13), multiple plate-shaped heat exchange plates (12) and the second fixed template (14) are sequentially stacked and connected, the first through hole (10) and the second through hole (11) penetrate each plate-shaped heat exchange plate (12) along the thickness direction of the plate heat exchanger and penetrate the first fixed template (13) and / or the second fixed template (14).

10. The plate heat exchanger as described in claim 9, characterized in that, The plate heat exchange plate (12), the plate heating element (4), the first fixed template (13) and the second fixed template (14) are all arranged vertically to form a vertical plate heat exchanger. It also includes a base (14), which is connected to the lower end of the plate heat exchanger. The base (14) is used to install the plate heat exchanger vertically, and the lower end of the plate heat exchanger is provided with the first through hole (10) and the second through hole (11).

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