A double-walled plate element and a heat exchanger thereof

Abstract

The utility model discloses a double -walled formula board element and heat exchanger thereof, be provided with a plurality of ports on board element, and board element includes first heat exchange board and second heat exchange board, and first heat exchange board includes the first ridge portion and the first groove portion of having first heat exchange area, and first liquid area, and second heat exchange board includes second heat exchange area and second liquid area, and second heat exchange area includes the second ridge portion and the second groove portion of respectively with first ridge portion and first groove portion nested cooperation, and the leakage passage with at least one leakage port is formed between first liquid area and second liquid area cooperation, and the connecting passage that is linked with leakage passage is formed with between at least partial first ridge portion and second ridge portion and / or between first groove portion and second groove portion cooperation, the utility model discloses double -walled formula board element can undertake medium of medium space leakage and realize external discharge through periphery, effectively avoided the mixing between two kinds of medium, can be convenient for the monitoring of heat exchanger leakage condition simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a double-walled plate element and its heat exchanger. Background Technology

[0002] Plate heat exchangers are a new type of high-efficiency heat exchanger composed of a series of metal plates with a certain corrugated shape stacked together. The metal plates of the plate heat exchanger are supported by a pressed pattern to form alternating spaces for different media to flow and exchange heat. However, during long-term use, the metal plates of existing plate heat exchangers are prone to cracking, which can lead to leakage between adjacent media spaces and mixing of different media. This can cause the heat exchanger to fail. Moreover, this leakage phenomenon is difficult to monitor, indicating room for improvement. Utility Model Content

[0003] This invention aims to overcome the deficiencies in the prior art by providing a double-walled plate element, which is a double-plate structure with an internal leakage space. The internal leakage space can catch the leaking liquid above to prevent mixing between media when a leak occurs. At the same time, the leakage space of the plate element can guide the leaking liquid out, which is conducive to leakage monitoring and timely maintenance and replacement. In addition, a heat exchanger is also provided, which is composed of the above-mentioned double-walled plate elements stacked together, and also has the advantages of the plate elements.

[0004] To achieve the above objectives, this utility model provides a double-walled plate element for stacking to form a plate heat exchanger. The plate element is provided with several ports. The plate element includes a first heat exchange plate and a second heat exchange plate stacked on top of the first heat exchange plate, and the two cooperate to form a relatively closed leakage space. The first heat exchange plate includes a first heat exchange zone located in the middle and having a first ridge and a first groove, and a first liquid flow zone disposed on the outer periphery of the first heat exchange zone. The second heat exchange plate includes a second heat exchange zone and a second liquid flow zone corresponding to the first heat exchange zone and the first liquid flow zone, respectively. The second heat exchange zone includes a second ridge and a second groove that are nested and cooperated with the first ridge and the first groove, respectively. The first liquid flow zone and the second liquid flow zone cooperate to form a leakage channel with at least one leakage port, and the first ridge and the second ridge, which are at least partially nested, cooperate to form a connection channel that communicates with the leakage channel.

[0005] The configuration is further defined as follows: the wall between the top of the first ridge and the bottom of the first groove of the first heat exchange plate is a first connecting wall, and the wall between the top of the second ridge and the bottom of the second groove of the second heat exchange plate is a second connecting wall. The first connecting wall and the second connecting wall are connected by line contact or surface contact.

[0006] The configuration is further defined as follows: the top width of the first ridge is greater than the top width of the second ridge, and the bottom width of the second groove is greater than the bottom width of the first groove.

[0007] The configuration is further defined as follows: the first heat exchange plate is provided with a first flange along its outer edge, and the second heat exchange plate is provided with a second flange along its outer edge, and the first heat exchange plate and the second heat exchange plate are nested together by the flanges.

[0008] The design is further configured such that: a first notch is provided on the first flange, and a second notch is provided on the second flange corresponding to the first notch, the first notch and the second notch cooperate to form a leakage outlet.

[0009] Further configuration: The plate element is a rectangular structure, and the leakage outlet is located on the short side of the plate element.

[0010] This utility model also provides a heat exchanger, including the plate element described above.

[0011] Compared with the prior art, the plate element of this utility model is a double plate structure with an internal leakage space. The internal leakage space can receive the leakage liquid from the upper medium space in the event of a leak to prevent the mixing of different media. At the same time, the leakage space of the plate element can also guide the leakage liquid out, thereby facilitating leakage monitoring. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the separation structure of a heat exchanger according to the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the heat exchanger; Figure 3 This is a schematic diagram of the board component structure; Figure 4 This is a schematic diagram of the separate structure of the board components.

[0013] The following reference numerals are marked on the accompanying drawings: 10. Plate element; 11. Port; 12. Leakage channel; 121. Leakage port; 13. Connection channel; 20. First heat exchange plate; 21. First heat exchange zone; 211. First ridge; 212. First groove; 213. First connecting wall; 22. First liquid flow zone; 23. First flange; 231. First notch; 30. Second heat exchange plate; 31. Second heat exchange zone; 311. Second ridge; 312. Second groove; 313. Second connecting wall; 32. Second liquid flow zone; 33. Second flange; 331. Second notch; 40. Medium space. Detailed Implementation

[0014] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0015] This utility model discloses a heat exchanger, such as... Figure 1 and Figure 2 As shown, it includes several rectangular plate elements 10 stacked on each other. Each plate element 10 is provided with a pressed pattern having ridges and grooves, and a port 11 is provided at each of its four corners. Adjacent plate elements 10 are supported and connected (welded together) by the ridges and grooves arranged opposite to each other to form alternating first medium space 40 and second medium space 40. At the same time, the ports 11 on the plate elements 10 are connected in pairs to realize the structural communication between the first medium space 40 and the second medium space 40. The first medium space 40 and the second medium space 40 are respectively supplied with the flow of the first medium and the second medium for heat exchange.

[0016] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, the plate element 10 is a double-walled structure including a first heat exchange plate 20 and a second heat exchange plate 30. The second heat exchange plate 30 is stacked on the first heat exchange plate 20 to form a leakage space between the two. This leakage space is used to receive the leakage of liquid from the upper medium space 40 and guide it to the outside discharge. This avoids the mixing between the first medium and the second medium. At the same time, by monitoring whether there is leakage in the leakage space or whether there is leakage discharge, it is easy to know whether the heat exchanger is damaged and leaking, so that maintenance and replacement can be carried out in a timely manner.

[0017] In this embodiment, as Figure 2 , Figure 3 and Figure 4As shown, both the first heat exchange plate 20 and the second heat exchange plate 30 are corrugated plates formed by stamping. The first heat exchange plate 20 includes a first heat exchange region 21 located in the middle and having a first ridge 211 and a first groove 212, and a first liquid flow region 22 disposed on the outer periphery of the first heat exchange region 21. The second heat exchange plate 30 includes a second heat exchange region 31 and a second liquid flow region 32 corresponding to the first heat exchange region 21 and the first liquid flow region 22, respectively. The second heat exchange region 31 includes a second ridge 311 and a second groove 312 that are nested and fitted with the first ridge 211 and the first groove 212, respectively. The first groove 212 and the second ridge 311 respectively form the groove and ridge of the pressed pattern of the plate element 10. The ridge and the groove are connected to the plate element 10. The "V"-shaped structure between the liquid flow zones can also be a W-shaped structure; wherein, the first liquid flow zone 22 and the second liquid flow zone 32 are arranged at intervals to cooperate in forming a leakage channel 12 with at least one leakage port 121, and at least a portion of the first ridge 211 and the second ridge 311 and / or the first trough 212 and the second trough 312 are connected to the leakage channel 12. Preferably, all the first ridges 211 and the second trough 312 and all the first troughs 212 and the second trough 312 are connected to form a connecting channel 13, so that the medium leaking in the corresponding heat exchange zone can flow into the leakage channel 12 through the connecting channel 13 and be discharged from the leakage port 121 by guidance.

[0018] In this embodiment, as Figure 2 As shown, the wall between the top of the first ridge 211 and the bottom of the first groove 212 of the first heat exchange plate 20 is the first connecting wall 213, and the wall between the top of the second groove 312 and the bottom of the second groove 312 of the second heat exchange plate 30 is the second connecting wall 313. The corresponding first connecting wall 213 and second connecting wall 313 are connected by line contact or surface contact, which effectively ensures the strength of the plate element 10. At the same time, the top width of the first ridge 211 is greater than the top width of the second ridge 311, and the bottom width of the second groove 312 is greater than the bottom width of the first groove 212. This makes the second heat exchange plate 30 suspended on the first heat exchange plate 20. The corresponding first ridge 211 and second ridge 311 and the corresponding first groove 212 and second groove 312 are arranged at intervals to form a connecting channel 13. The adjacent connecting channels 13 are isolated by the abutment of the connecting wall.

[0019] In this embodiment, as Figure 4As shown, the first heat exchange plate 20 has a first flange 23 along its outer edge, and the second heat exchange plate 30 has a second flange 33 along its outer edge. The first heat exchange plate 20 and the second heat exchange plate 30 are connected by flange nesting to facilitate welding, so as to form a relatively closed leakage space between the first heat exchange plate 20 and the second heat exchange plate 30, and also facilitate the stacking arrangement of plate elements 10 by flange nesting. Preferably, the first flange 23 is provided with a first notch 231, and the second flange 33 is provided with a second notch 331 corresponding to the first notch 231. In this way, the corresponding first notch 231 and second notch 331 can be easily matched to form a leakage port 121, which is preferably located on the short side of the plate element 10.

[0020] Compared with the prior art, the plate element of this utility model is a double plate structure with an internal leakage space. The internal leakage space can receive the leakage liquid from the upper medium space in the event of a leak to prevent the mixing of different media. At the same time, the leakage space of the plate element can also guide the leakage liquid out, thereby facilitating leakage monitoring.

[0021] The above-disclosed embodiments are merely examples of the present utility model. However, the present utility model is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A double-walled plate element for stacking to form a plate heat exchanger, said plate element having a plurality of ports, characterized in that, The plate element includes a first heat exchange plate and a second heat exchange plate stacked on top of the first heat exchange plate, and the two cooperate to form a relatively closed leakage space. The first heat exchange plate includes a first heat exchange zone located in the middle and having a first ridge and a first groove, and a first liquid flow zone disposed on the outer periphery of the first heat exchange zone. The second heat exchange plate includes a second heat exchange zone and a second liquid flow zone corresponding to the first heat exchange zone and the first liquid flow zone, respectively. The second heat exchange zone includes a second ridge and a second groove that are nested and cooperated with the first ridge and the first groove, respectively. The first liquid flow zone and the second liquid flow zone cooperate to form a leakage channel with at least one leakage port, and at least a portion of the first ridge and the second ridge and / or the first groove and the second groove cooperate to form a connection channel that communicates with the leakage channel.

2. A double-walled plate element according to claim 1, characterized in that, The wall between the top of the first ridge and the bottom of the first groove of the first heat exchange plate is the first connecting wall, and the wall between the top of the second ridge and the bottom of the second groove of the second heat exchange plate is the second connecting wall. The first connecting wall and the second connecting wall are connected by line contact or surface contact.

3. A double-walled plate element according to claim 2, characterized in that, The top width of the first ridge is greater than the top width of the second ridge, and the bottom width of the second groove is greater than the bottom width of the first groove.

4. A double-walled plate element according to claim 1, characterized in that, The first heat exchange plate has a first flange along its outer edge, and the second heat exchange plate has a second flange along its outer edge. The first heat exchange plate and the second heat exchange plate are nested together by the flanges.

5. A double-walled plate element according to claim 4, characterized in that, The first flange has a first notch, and the second flange has a second notch corresponding to the first notch. The first notch and the second notch cooperate to form a leakage outlet.

6. A double-walled plate element according to claim 1, characterized in that, The plate element has a rectangular structure, and the leakage port is located on the short side of the plate element.

7. A heat exchanger, characterized in that, Includes the board element described in any one of claims 1-6 above.

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