Plate heat exchanger

Abstract

The plate heat exchanger comprises a first bottom plate, a group of first fluid medium joints, a group of second fluid medium joints, a heat exchanger group and a first top plate, a second bottom plate is arranged on the first bottom plate; the first fluid medium connector and the second fluid medium connector are arranged on the short edge below the first bottom plate. The heat exchanger group is arranged on the second bottom plate; the heat exchanger group comprises a plurality of heat exchangers; the heat exchanger is stacked on the second bottom plate; the heat exchanger comprises a first core plate and a second core plate. The second core plate is arranged on the first core plate; a space formed by the upper part of the first core plate and the second core plate completes heat exchange of the first fluid; a space formed by the lower part of the first core plate and the second core plate completes heat exchange of second fluid; the first top plate is arranged on the heat exchanger group; bionic fins are arranged on the second core plate; and a filter screen is arranged between the first bottom plate and the second bottom plate. According to the plate heat exchanger, the bionic fins are adopted, heat exchange can be conducted on two kinds of fluid at the same time, and meanwhile impurities in a system are effectively filtered through the filter screen.

Description

Technical Field

[0001] The invention belongs to the field of heat exchangers, and in particular relates to a plate heat exchanger. Background Art

[0002] In modern industry and daily life, heat exchangers play an important role. They are like energy carriers, transferring heat between different fluid media to achieve effective energy conversion and utilization. Among many heat exchangers, aluminum plate-fin heat exchangers have become the leaders in many fields with their unique structural design and excellent performance.

[0003] As the name implies, the core components of aluminum plate-fin heat exchangers are composed of aluminum plates and fins. These plates and fins are formed into a series of closely connected channels through precise processing techniques such as stamping and brazing, which are the main places for heat exchange. The design of the fins is another highlight of the aluminum plate-fin heat exchanger. The fins greatly increase the heat exchange area, allowing the heat to be evenly distributed on a wider surface, thereby accelerating the heat transfer process. At the same time, the structure of the fins can also guide the fluid to form turbulence in the channel, further enhancing the heat exchange effect. However, the flow channel of this heat exchanger is narrow, and the height of the flow channel may even be less than 2mm. In addition, the structure of the fins is complex, and the aluminum chips and impurities inside are not easy to clean up, which can easily cause blockage and increase the pressure drop.

[0004] Therefore, it is necessary to develop a new type of plate heat exchanger to solve the above problems. Summary of the invention

[0005] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide a plate heat exchanger which has strong adaptability to fluid media, can exchange heat between two fluids at the same time, and is easy to maintain; at the same time, a filter screen is provided to effectively filter impurities in the system.

[0006] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides a plate heat exchanger, comprising a first bottom plate, a group of first fluid medium joints, a group of second fluid medium joints, a heat exchanger group and a first top plate; a second bottom plate is provided on the first bottom plate; the first fluid medium joint is provided on one side of the short side below the first bottom plate; the second fluid medium joint is provided on the other side of the short side below the first bottom plate; the heat exchanger group is provided on the second bottom plate; The heat exchanger group includes several heat exchangers; the heat exchangers are stacked on the second bottom plate; the heat exchanger includes a first core plate and a second core plate; the second core plate is arranged on the first core plate; the space formed by the first core plate above and the second core plate cooperates with the first fluid medium joint to complete the heat exchange of the first fluid; the space formed by the first core plate below and the second core plate cooperates with the second fluid medium joint to complete the heat exchange of the second fluid; the first top plate is arranged on the heat exchanger group; a second top plate is arranged under the first top plate; a bionic fin is arranged on the second core plate; a filter is arranged between the first bottom plate and the second bottom plate near the first fluid medium joint.

[0007] Furthermore, the bionic fin adopts a bionic structure, which ensures its cleanliness and prevents impurities in the fins from clogging the system and causing increased pressure drop, thereby improving the heat exchange performance of the system and reducing flow resistance; the filter can effectively filter impurities in the system, and the heat exchanger can be removed after the system is shut down to easily clean up the impurities.

[0008] Furthermore, the first core plate is provided with a first lower convex groove near the first fluid medium joint; the second core plate is provided with a first upper convex groove near the first fluid medium joint; the first lower convex groove cooperates with the first upper convex groove above to complete the opening; the first lower convex groove cooperates with the first upper convex groove below to complete the sealing.

[0009] Furthermore, the first lower convex notch and the upper first upper convex notch opening provide guidance for the flow direction of the first fluid medium; the first lower convex notch and the lower first upper convex notch are sealed to ensure that the second fluid medium will not mix with the first fluid medium.

[0010] Furthermore, the first core plate is provided with a second upper convex groove near the second fluid medium joint; the second core plate is provided with a second lower convex groove near the second fluid medium joint; the second upper convex groove cooperates with the second lower convex groove below to complete the opening; the second upper convex groove cooperates with the second lower convex groove above to complete the sealing.

[0011] Furthermore, the second upper convex notch and the second lower convex notch opening below provide guidance for the flow direction of the second fluid medium; the second upper convex notch and the second lower convex notch above are sealed to ensure that the first fluid medium will not mix with the second fluid medium.

[0012] Furthermore, the second top plate is provided with a second top plate lower convex notch near the first fluid medium joint; the second top plate is provided with a concave sealing plate near the second fluid medium joint; the second top plate lower convex notch cooperates with the first upper convex notch below to complete sealing. The second top plate lower convex notch is sealed with the first upper convex notch below, ensuring that the second fluid medium will not mix with the first fluid medium.

[0013] Furthermore, the second bottom plate is provided with a second bottom plate upper convex notch near the first fluid medium joint; the second bottom plate is provided with a second bottom plate opening near the second fluid medium joint; the second bottom plate convex notch cooperates with the upper first lower convex notch to complete the seal. The second bottom plate convex notch is sealed with the upper first lower convex notch to ensure that the second fluid medium will not mix with the first fluid medium.

[0014] Furthermore, the second core plate is provided with a plurality of protrusions in the direction of the first bottom plate, and the protrusions improve the heat exchange performance.

[0015] Furthermore, a first fluid medium flow guide partition is provided above the first core plate; a second fluid medium flow guide partition is provided above the second core plate. The first fluid medium flow guide partition and the second fluid medium flow guide partition ensure that the two fluid media flow in one circle, ensuring complete heat exchange.

[0016] Furthermore, the bionic fin adopts a bionic structure, which is mass-produced by additive manufacturing. The bionic fin adopts an additive manufacturing process for mass production, without the need for molds or stamping equipment, and has a high material utilization rate; and under the same conditions, the heat exchanger can be made smaller, which can save costs and assembly space.

[0017] It can be seen from the above technical solution that the present invention has the following beneficial effects: 1. The plate heat exchanger of the present invention uses bionic fins and a bionic structure, so that the cleanliness thereof is guaranteed, and impurities in the fins are prevented from clogging the system and causing an increase in pressure drop, thereby improving the heat exchange performance of the system and reducing flow resistance.

[0018] 2. The plate heat exchanger of the present invention has strong adaptability to fluid media, can exchange heat between two fluids at the same time, and is easy to maintain; at the same time, a filter screen is provided to effectively filter impurities in the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of a plate heat exchanger according to the present invention; Figure 2 A top view of a plate heat exchanger according to the present invention; Figure 3 An exploded view of a first top plate, a second top plate, a first core plate and two second core plates in a plate heat exchanger according to the present invention; Figure 4 is a top view of the second core plate; Figure 5 for Figure 3 A top view of Figure 6 for Figure 5 DD section view; Figure 7 is a cross-sectional view of the second base plate and the first core plate; Figure 8 is a bottom view of the second core plate; Fig. 9 is a top view of the first core plate; In the figure: 1-first bottom plate; 11-second bottom plate; 111 - convex notch on the second bottom plate; 112 - opening of the second bottom plate; 2-first fluid medium joint; 21-filter; 3- Second fluid medium joint; 4-heat exchanger group; 41-heat exchanger; 411-first core board; 412-second core board; 4111-first lower convex notch; 4112-second upper convex notch; 4121-first upper convex notch; 4122-second lower convex notch; 4123-protrusion; 4113-first fluid medium flow guide partition; 4124-second fluid medium flow guide partition; 5-first top plate; 51-second top plate; 511 - convex notch below the second top plate; 512-recessed sealing plate; 6- Bionic fins. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0021] Example 1 In this embodiment, Figures 1 to 3 The present invention discloses a plate heat exchanger, comprising a first bottom plate 1, a group of first fluid medium joints 2, a group of second fluid medium joints 3, a heat exchanger group 4 and a first top plate 5; a second bottom plate 11 is provided on the first bottom plate 1; the first fluid medium joints 2 are provided on one side of a short side below the first bottom plate 1, and a filter screen 21 is provided at one of the first fluid medium joints 2; the second fluid medium joints 3 are provided on the other side of the short side below the first bottom plate 1; the heat exchanger group 4 is provided on the second bottom plate 11; The heat exchanger group 4 comprises a plurality of heat exchangers 41; the heat exchangers 41 are stacked on the second bottom plate 11; the heat exchanger 41 comprises a first core plate 411 and a second core plate 412; the second core plate 412 is arranged on the first core plate 411; the space formed by the first core plate 411 and the second core plate 412 cooperates with the first fluid medium joint 2 to complete the heat exchange of the first fluid; the space formed by the first core plate 411 and the second core plate 412 cooperates with the second fluid medium joint 3 to complete the heat exchange of the second fluid; the first top plate 5 is arranged on the heat exchanger group 4; a second top plate 51 is arranged under the first top plate 5; a bionic fin 6 is arranged on the second core plate 412; a filter screen (21) is arranged between the first bottom plate (1) and the second bottom plate (11) near the first fluid medium joint (2).

[0022] Specifically, the filter screen 21 is disposed between the first bottom plate 1 and the second bottom plate 11 by brazing.

[0023] Specifically, a plate heat exchanger of the present invention is assembled into a whole and then placed in a brazing furnace for brazing to finally form a finished heat exchanger.

[0024] Example 2 On the basis of Example 1, in this example, Figure 1 and Figure 6 The present invention discloses a plate heat exchanger, wherein the first core plate 411 is provided with a first lower convex groove 4111 near the first fluid medium joint 2; the second core plate 412 is provided with a first upper convex groove 4121 near the first fluid medium joint 2; the first lower convex groove 4111 cooperates with the first upper convex groove 4121 above to complete the opening; the first lower convex groove 4111 cooperates with the first upper convex groove 4121 below to complete the sealing.

[0025] Specifically, the first core plate 411 is a flat surface with smooth surfaces on both sides.

[0026] In this embodiment, if Figure 1 and Figure 6 The first core plate 411 is provided with a second upper convex groove 4112 near the second fluid medium joint 3; the second core plate 412 is provided with a second lower convex groove 4122 near the second fluid medium joint 3; the second upper convex groove 4112 cooperates with the second lower convex groove 4122 below to complete the opening; the second upper convex groove 4112 cooperates with the second lower convex groove 4122 above to complete the sealing.

[0027] Specifically, the first fluid medium joint 2 and the second fluid medium joint 3 are both welded on the first bottom plate 1 .

[0028] In this embodiment, if Figure 1 , Figure 5 and Figure 6 A second top plate lower convex notch 511 is provided near the first fluid medium joint 2 of the second top plate 51; a concave sealing plate 512 is provided near the second fluid medium joint 3 of the second top plate 51; the second top plate lower convex notch 511 cooperates with the first upper convex notch 4121 below to complete sealing.

[0029] Specifically, the first fluid medium joint 2 can be made into a form of radial sealing or end face sealing with the system.

[0030] In this embodiment, if Figure 1 and Figure 7 The second bottom plate 11 is provided with a second bottom plate upper convex groove 111 near the first fluid medium joint 2; the second bottom plate 11 is provided with a second bottom plate opening 112 near the second fluid medium joint 3; the second bottom plate convex groove 111 cooperates with the first lower convex groove 4111 above to complete the sealing.

[0031] Specifically, the first fluid medium joint 2 can be a combined joint, that is, two first fluid medium joints 2 are made into one, while ensuring the flow in and out of the first fluid medium.

[0032] In this embodiment, if Figure 8 A plurality of protrusions 4123 are provided on the second core plate 412 toward the first bottom plate 1 .

[0033] Specifically, one side of the second core plate 412 is provided with a plurality of protrusions 4123, and the other side is provided with many corresponding recesses. The protrusions 4123 cooperate to complete the heat exchange of the first fluid medium, and the recesses corresponding to the protrusions 4123 cooperate with the bionic fins 6 to complete the heat exchange of the second fluid medium.

[0034] Specifically, the cross section of the protrusion 4123 on the second core plate 412 , that is, the cross section parallel to the second core plate 412 is circular, elliptical, or teardrop-shaped; when the cross section is teardrop-shaped, the small end of the teardrop is close to the first fluid medium joint 2 .

[0035] In this embodiment, if Figure 4 and Fig. 9 A first fluid medium flow guide partition 4113 is provided above the first core plate 411 ; a second fluid medium flow guide partition 4124 is provided above the second core plate 412 .

[0036] Specifically, the shapes and lengths of the first fluid medium flow guide partition 4113 and the second fluid medium flow guide partition 4124 may be set according to required heat dissipation efficiency.

[0037] In this embodiment, if Figure 4 The bionic fin 6 adopts a bionic structure, which is mass-produced by additive manufacturing.

[0038] The working principle of the above embodiment is: The present invention discloses a plate heat exchanger, wherein a first fluid medium flows in from a first fluid medium joint 2 having a filter screen 21, is filtered by the filter screen 21, flows in a space formed by a first core plate 411 and a second core plate 412, and heat is dissipated by the cooperation of a protrusion 4123 on the second core plate 412, flows in a circle under the guidance of a first fluid medium flow guide partition 4113, and then flows out from another first fluid medium joint 2; The second fluid medium flows in from a second fluid medium joint 3, flows in the space formed by the first core plate 411 and the second core plate 412 below the first core plate 411, and heat is dissipated by the cooperation of the concave corresponding to the protrusion 4123 on the second core plate 412 and the bionic fin 6. After flowing for a circle under the guidance of the second fluid medium flow guide partition 4124, it flows out from another second fluid medium joint 3.

[0039] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A plate heat exchanger, characterized in that: It comprises a first bottom plate (1), wherein a second bottom plate (11) is provided on the first bottom plate (1); A group of first fluid medium joints (2), wherein the first fluid medium joints (2) are arranged on one side of a short side below the first bottom plate (1); A group of second fluid medium joints (3), wherein the second fluid medium joints (3) are arranged on the other side of the short side below the first bottom plate (1); A heat exchanger group (4), the heat exchanger group (4) being arranged on the second bottom plate (11); the heat exchanger group (4) comprising a plurality of heat exchangers (41); the heat exchangers (41) being stacked and arranged on the second bottom plate (11); The heat exchanger (41) comprises a first core plate (411) and a second core plate (412); the second core plate (412) is arranged on the first core plate (411); The space formed above the first core plate (411) and the second core plate (412) cooperates with the first fluid medium joint (2) to complete the heat exchange of the first fluid; the space formed below the first core plate (411) and the second core plate (412) cooperates with the second fluid medium joint (3) to complete the heat exchange of the second fluid; A first top plate (5), the first top plate (5) being arranged on the heat exchanger group (4); a second top plate (51) being arranged below the first top plate (5); The second core plate (412) is provided with a bionic fin (6); A filter screen (21) is provided between the first bottom plate (1) and the second bottom plate (11) near the first fluid medium joint (2).

2. The plate heat exchanger according to claim 1, characterized in that: The first core plate (411) is provided with a first lower convex notch (4111) near the first fluid medium joint (2); the second core plate (412) is provided with a first upper convex notch (4121) near the first fluid medium joint (2); the first lower convex notch (4111) cooperates with the upper first upper convex notch (4121) to complete the opening; the first lower convex notch (4111) cooperates with the lower first upper convex notch (4121) to complete the sealing.

3. The plate heat exchanger according to claim 1, characterized in that: The first core plate (411) is provided with a second upper convex notch (4112) near the second fluid medium joint (3); the second core plate (412) is provided with a second lower convex notch (4122) near the second fluid medium joint (3); the second upper convex notch (4112) cooperates with the second lower convex notch (4122) below to complete the opening; the second upper convex notch (4112) cooperates with the second lower convex notch (4122) above to complete the sealing.

4. The plate heat exchanger according to claim 2, characterized in that: The second top plate (51) is provided with a second top plate lower convex notch (511) near the first fluid medium joint (2); the second top plate (51) is provided with a concave sealing plate (512) near the second fluid medium joint (3); the second top plate lower convex notch (511) cooperates with the first upper convex notch (4121) below to complete sealing.

5. The plate heat exchanger according to claim 3, characterized in that: The second bottom plate (11) is provided with a second bottom plate upper convex groove (111) near the first fluid medium joint (2); the second bottom plate (11) is provided with a second bottom plate opening (112) near the second fluid medium joint (3); the second bottom plate upper convex groove (111) cooperates with the first lower convex groove (4111) above to complete sealing.

6. The plate heat exchanger according to claim 1, characterized in that: A plurality of protrusions (4123) are provided on the second core plate (412) in a direction toward the first bottom plate (1).

7. The plate heat exchanger according to claim 1, characterized in that: A first fluid medium flow guide partition (4113) is provided above the first core plate (411); and a second fluid medium flow guide partition (4124) is provided above the second core plate (412).

8. The plate heat exchanger according to claim 1, characterized in that: The bionic fin (6) adopts a bionic structure as its structural form, and the structure is mass-produced by additive manufacturing.

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