Heat exchanger welded by corrugated plates

Abstract

The utility model discloses a heat exchanger welded by corrugated plates, which comprises a first corrugated plate and a second corrugated plate which are alternately stacked up and down, and the edge of the first corrugated plate and the edge of the second corrugated plate are respectively provided with a circle of flanging part. Liquid inlets and outlets are formed in the two ends of the first corrugated plate piece and the two ends of the second corrugated plate piece correspondingly, and corrugated downwards-concave parts extending downwards are arranged on the bottom faces of the first corrugated plate piece and the second corrugated plate piece in an arrayed mode. Corrugated planes are arranged on the lower end faces of the corrugated downwards-concave parts and the tops of the parts between the adjacent corrugated downwards-concave parts, and the first corrugated plate piece and the second corrugated plate piece are oppositely arranged by rotating by 180 degrees. The first corrugated plate piece and the second corrugated plate piece are connected in a welded mode through the corrugated planes which are in contact with each other and serve as first welding points. The corrugated plate can solve the problem that existing corrugated plates are not firmly welded.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger welded with corrugated plates. Background Art

[0002] The corrugated plate is the main part of the heat exchanger assembly. During the assembly process, the plates are stacked and welded together using a fixture in a vacuum brazing furnace under high temperature and high vacuum conditions. During the brazing process, the corrugated plates are not easy to contact and fit, resulting in no welding points or weak welding points between the plates, resulting in insufficient strength between the plates, leading to fatigue cracking between the plates during use, and further leakage and failure. Utility Model Content

[0003] The utility model provides a heat exchanger which is welded by using corrugated plates, and can solve the problem of weak welding between existing corrugated plates.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat exchanger welded with corrugated plates, comprising a first corrugated plate and a second corrugated plate alternately stacked up and down, the edges of the first corrugated plate and the second corrugated plate are both provided with a circle of flanged portions, both ends of the first corrugated plate and the second corrugated plate are provided with liquid inlet and outlet ports, the bottom surfaces of the first corrugated plate and the second corrugated plate are arranged with corrugated concave portions extending downward, the lower end surfaces of the corrugated concave portions and the portions between adjacent corrugated concave portions are arranged in a circle, and the first corrugated plate and the second corrugated plate are arranged in a circle. The top of each of the parts is provided with a corrugated plane, the first corrugated plate sheet and the second corrugated plate sheet are arranged in opposite directions with a rotation of 180 degrees, and the first corrugated plate sheet and the second corrugated plate sheet are welded and connected via the contacting corrugated plane as the first welding point, and the first welding point formed by the corrugated plane between the first and second corrugated plate sheets installed positively and negatively can realize the formation of capillary action under the high temperature and high vacuum conditions in the vacuum brazing furnace, so that the solder coating on the surface of the plate sheet is melted, accumulated and solidified, thereby preventing the loss of solder without contact surface, and ensuring the connection strength between the plates.

[0005] Preferably, the liquid inlet and outlet include a first liquid inlet and outlet and a second liquid inlet and outlet arranged side by side at both ends of a first corrugated plate sheet and a second corrugated plate sheet, wherein the edge of the first liquid inlet and outlet is provided with a circle of downwardly extending bosses, and the bosses on the first corrugated plate sheet are tightly attached to the edge of the second liquid inlet and outlet on the second corrugated plate sheet of the next layer and form a second welding point, thereby improving the bonding strength between the first corrugated plate sheet and the second corrugated plate sheet by forming the second welding point.

[0006] Preferably, a third welding point is formed between the flange parts of the first corrugated board sheet and the second corrugated board sheet, and the third welding point is set by utilizing the contact position between the flange parts to improve the bonding strength between the first corrugated board sheet and the second corrugated board sheet.

[0007] Preferably, a sunken portion is provided around the first liquid inlet and outlet and at a position connected to the flange portion, and the bottom of the sunken portion of the first corrugated plate sheet contacts the corresponding bottom surface of the second corrugated plate sheet to form a fourth welding point. The sunken portion can not only improve the strength of the first corrugated plate sheet and the second corrugated plate sheet, but also improve the bonding strength between the first corrugated plate sheet and the second corrugated plate sheet by setting the fourth welding point.

[0008] Preferably, the corrugated concave portion is continuous or discontinuous in shape and can be arranged as required.

[0009] Preferably, a marking groove is provided on one side edge of the first corrugated plate sheet and the second corrugated plate sheet, so as to facilitate identification of the placement direction of the first corrugated plate sheet and the second corrugated plate sheet during assembly.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] By utilizing the first welding points formed by the corrugated plane between the first corrugated plate and the second corrugated plate installed positively and negatively, a capillary action can be formed under high temperature and high vacuum conditions in a vacuum brazing furnace, so that the solder coated on the surface of the plate is melted, accumulated and solidified, thereby preventing the loss of solder on the non-contact surface. The large number of first welding points can ensure the connection strength between the plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional structural diagram of the utility model from the first perspective;

[0013] Figure 2 This is a second perspective three-dimensional structural diagram of the utility model;

[0014] Figure 3 It is a top view of the structure of the utility model;

[0015] Figure 4 for Figure 3 AA section structure diagram;

[0016] Figure 5 for Figure 3 BB section structure diagram;

[0017] Figure 6 for Figure 3 CC section structure diagram;

[0018] Figure 7 for Figure 5 Enlarged structural diagram at point A.

[0019] Reference numerals:

[0020] 1. First corrugated plate, 2. Second corrugated plate, 3. First liquid inlet and outlet, 4. Boss, 5. Sinking portion, 6. Second liquid inlet and outlet, 7. Corrugated concave portion, 8. Marking groove, 9. Corrugated plane, 10. Flanged portion, A. First welding point, B. Second welding point, C. Third welding point, D. Fourth welding point. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] like Figure 1-7 As shown, the utility model provides the following technical solutions to solve the problem of weak welding between existing corrugated plates: a heat exchanger welded by corrugated plates, comprising a first corrugated plate 1 and a second corrugated plate 2 alternately stacked up and down, the edges of the first corrugated plate 1 and the second corrugated plate 2 are both provided with a circle of flange 10, both ends of the first corrugated plate 1 and the second corrugated plate 2 are both provided with liquid inlet and outlet, the bottom surfaces of the first corrugated plate 1 and the second corrugated plate 2 are arranged with corrugated lower concave portions 7 extending downward, the lower end surfaces of the corrugated lower concave portions 7 and the adjacent corrugated plates are arranged on the bottom surfaces of the first corrugated plate 1 and the second corrugated plate 2. The top of the part between the corrugated concave parts 7 is provided with a corrugated plane 9, and the first corrugated plate sheet 1 and the second corrugated plate sheet 2 are arranged in opposite directions with a rotation of 180 degrees. The first corrugated plate sheet 1 and the second corrugated plate sheet 2 are welded and connected through the contacting corrugated plane 9 as the first welding point A. The first welding point A formed by the corrugated plane 9 between the first corrugated plate sheet 1 and the second corrugated plate sheet 2 installed positively and negatively can realize the formation of capillary action under high temperature and high vacuum conditions in the vacuum brazing furnace, so that the solder coating on the surface of the plate sheet is melted, accumulated and solidified, thereby preventing the loss of solder without contact surface and ensuring the connection strength between the plates.

[0023] Specifically, the first corrugated plate sheet 1 and the second corrugated plate sheet 2 are formed by stamping and pressing of the plate, and the corrugated plane 9 needs to be formed during the stamping and pressing process, so the height, plane width and corrugation R angle of the corrugated lower recess 7 need to be greater than a certain design value to ensure that a certain corrugated plane 9 is present after stamping and forming.

[0024] Among them, the first corrugated plate sheet 1 and the second corrugated plate sheet 2 are placed in opposite directions, so the corrugated recessed portions 7 in opposite directions can be staggered to form a relatively large number of intersections, each intersection can form a first welding point A, and the corrugated recessed portions 7 are continuous or discontinuous in shape and can be set as needed.

[0025] The essence of capillary action is the attraction of the liquid surface to the solid surface, and the balance between the cohesive force between liquid molecules and the adhesive force between the liquid and the container molecules. In this embodiment, the first welding point A can gather the molten solder around the first welding point A, and after solidification, a relatively strong welding structure can be formed.

[0026] In this embodiment, if Figure 1-2 As shown, the liquid inlet and outlet include a first liquid inlet and outlet 3 and a second liquid inlet and outlet 6 arranged side by side at both ends of the first corrugated plate sheet 1 and the second corrugated plate sheet 2, wherein the edge of the first liquid inlet and outlet 3 is provided with a circle of bosses 4 extending downward, the bosses 4 on the first corrugated plate sheet 1 are tightly attached to the edge of the second liquid inlet and outlet 6 on the second corrugated plate sheet 2 of the next layer and form a second welding point B, and the bonding strength between the first corrugated plate sheet 1 and the second corrugated plate sheet 2 is improved by forming the second welding point B, and the bosses 4 and the second liquid inlet and outlet 6 are also in surface contact, and the welding strength is large.

[0027] In this embodiment, if Figure 4 As shown, a third welding point C is formed between the flange portions 10 of the first corrugated board sheet 1 and the second corrugated board sheet 2. The third welding point C is set by utilizing the contact position between the flange portions 10 to improve the bonding strength between the first corrugated board sheet 1 and the second corrugated board sheet 2.

[0028] In order to further improve the strength of the heat exchanger, such as Figure 5 As shown, a sinking portion 5 is provided around the first liquid inlet and outlet 3 at a position connected to the flange portion 10, and the bottom of the sinking portion 5 of the first corrugated board sheet 1 contacts the corresponding bottom surface of the second corrugated board sheet 2 to form a fourth welding point D. The sinking portion 5 can not only improve the strength of the first corrugated board sheet 1 and the second corrugated board sheet 2, but also improve the bonding strength between the first corrugated board sheet 1 and the second corrugated board sheet 2 by setting the fourth welding point D.

[0029] In order to facilitate assembly, a marking groove 8 is provided on one side edge of the first corrugated board sheet 1 and the second corrugated board sheet 2 to facilitate identification of the placement direction of the first corrugated board sheet 1 and the second corrugated board sheet 2 during assembly.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A heat exchanger welded with corrugated plates, characterized in that: include: A first corrugated plate sheet (1) and a second corrugated plate sheet (2) are alternately stacked up and down, the edges of the first corrugated plate sheet (1) and the second corrugated plate sheet (2) are both provided with a circle of flanged portions (10), both ends of the first corrugated plate sheet (1) and the second corrugated plate sheet (2) are both provided with liquid inlet and outlet ports, downwardly extending corrugated recessed portions (7) are arranged on the bottom surfaces of the first corrugated plate sheet (1) and the second corrugated plate sheet (2), the lower end surfaces of the corrugated recessed portions (7) and the tops of the portions between adjacent corrugated recessed portions (7) are both provided with corrugated planes (9), the first corrugated plate sheet (1) and the second corrugated plate sheet (2) are arranged in opposite directions with a rotation of 180 degrees, and the first corrugated plate sheet (1) and the second corrugated plate sheet (2) are welded and connected via the contacting corrugated planes (9) as the first welding point (A).

2. The heat exchanger welded with corrugated sheets according to claim 1, characterized in that: The liquid inlet and outlet include a first liquid inlet and outlet (3) and a second liquid inlet and outlet (6) arranged side by side at both ends of a first corrugated plate sheet (1) and a second corrugated plate sheet (2), wherein the edge of the first liquid inlet and outlet (3) is provided with a circle of bosses (4) extending downwards, and the bosses (4) on the first corrugated plate sheet (1) are tightly attached to the edge of the second liquid inlet and outlet (6) on the second corrugated plate sheet (2) of the next layer to form a second welding point (B).

3. The heat exchanger welded with corrugated sheets according to claim 1 or 2, characterized in that: A third welding point (C) is formed between the flanged portions (10) of the first corrugated board sheet (1) and the second corrugated board sheet (2).

4. The heat exchanger welded with corrugated sheets according to claim 2, characterized in that: A sinking portion (5) is provided around the first liquid inlet and outlet (3) at a position connected to the flange portion (10), and the bottom of the sinking portion (5) of the first corrugated plate sheet (1) contacts the corresponding bottom surface of the second corrugated plate sheet (2) to form a fourth welding point (D).

5. The heat exchanger welded with corrugated sheets according to claim 1, characterized in that: The corrugated lower concave portion (7) is of a continuous or discontinuous shape.

6. The heat exchanger welded with corrugated sheets according to claim 1, characterized in that: A marking groove (8) is provided on one side edge of the first corrugated plate (1) and the second corrugated plate (2).

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