CN219200145U

CN219200145U - Plate heat exchanger

Info

Publication number: CN219200145U
Application number: CN202223201596.0U
Authority: CN
Inventors: 张路平; 梁跃
Original assignee: Guangzhou Et Heat Exchanger Co ltd
Current assignee: Guangzhou Et Heat Exchanger Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-06-16
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a plate heat exchanger, which comprises a first heat exchange unit, wherein the first heat exchange unit comprises a first plate body, a second plate body, a heat exchange tube, a first medium inlet, a first medium outlet, a second medium inlet and a second medium outlet, the first plate body and the second plate body are detachably fixed, the heat exchange tube is clamped between the first plate body and the second plate body, a first heat exchange flow channel is formed between the first plate body and the second plate body, the heat exchange tube is arranged in the first heat exchange flow channel, the first medium inlet and the first medium outlet are respectively connected at two ends of the heat exchange tube, and the second medium inlet and the second medium outlet are respectively connected at two ends of the first heat exchange flow channel; the heat exchange device further comprises at least one second heat exchange unit, wherein the first heat exchange unit and the second heat exchange unit are detachably fixed, and a first heat exchange flow of the first heat exchange unit is communicated with a second heat exchange flow channel of the second heat exchange unit; the plate heat exchanger has the advantages of reasonable structure, low use cost and easy maintenance.

Description

Plate heat exchanger

Technical Field

The utility model belongs to the technical field of heat exchange equipment, and particularly relates to a plate heat exchanger.

Background

A heat exchanger, also called a heat exchanger, is a device that transfers heat between two or more media at different temperatures. Heat exchangers are vital in chemical, petroleum, power, food and many other industrial processes, and can be used as heaters, coolers, condensers, evaporators, reboilers, and the like. For example, in a known air conditioner, an evaporator and a condenser in an indoor unit and an outdoor unit are one of heat exchangers. The plate heat exchanger has the advantages of compact structure, small occupied area, flexible and convenient heat exchange amount matching (the heat exchange capacity can be freely increased or reduced), so that the application range of the plate heat exchanger is very wide; however, the plate heat exchanger in the prior art has the technical problems of high use cost or inconvenient use in the use process.

Specifically, as disclosed in patent application No. 201720969456.8, a plate heat exchanger having a plate for a plate heat exchanger of the type in which a plurality of plates are stacked and passages through which different mediums flow are formed between adjacent plates, while heat exchange is performed between the different mediums through the plates, and when the medium involved in heat exchange is a low-pressure medium, such as a liquid medium at normal pressure, the heat exchanger can be operated stably and reliably; furthermore, when the medium involved in heat exchange is a high-pressure medium, such as a refrigerant (in a gaseous state under normal pressure) is used as a first medium to exchange heat with a liquid second medium, the sealing rings between the adjacent plates bear higher pressure, and meanwhile, as one sealing ring is needed between the adjacent plates, the machine rate of leakage at the sealing rings under high pressure is greatly improved, so that in order to ensure the use reliability of the heat exchanger, the maintenance workload of the heat exchanger is increased, and the problems of high use cost and inconvenience of the heat exchanger are caused; further, when the brazing plate type heat exchanger is used (the adjacent plates are brazed and sealed), although the problem of sealing can be solved, the problem of inconvenient maintenance of the heat exchanger is brought, for example, when water is used as a heat exchange medium, the problem of scaling exists after long-time use, and at the moment, certain inconvenience is brought to the descaling of the heat exchanger due to the brazing and sealing between the plates, namely, the inconvenience is brought to the use of the heat exchanger.

Disclosure of Invention

In view of the above, the present utility model aims to provide a plate heat exchanger with reasonable structure, low use cost and easy maintenance.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a plate heat exchanger, its includes first heat exchange unit, first heat exchange unit includes first plate body, second plate body, heat exchange tube, first medium import, first medium export, second medium import and second medium export, first plate body with the second plate body is detachable fixed, the heat exchange tube clamp is in first plate body with between the second plate body, just first plate body with form first heat transfer runner between the second plate body, the heat exchange tube is arranged in the first heat transfer runner, first medium import with first medium export is connected respectively in the both ends department of heat exchange tube, second medium import with second medium export is connected respectively in the both ends department of first heat transfer runner.

As a further improvement of the plate heat exchanger, the first plate body is provided with a first groove, the second plate body is provided with a second groove, and the first groove corresponds to the second groove and forms the first heat exchange flow channel.

As a further improvement of the plate heat exchanger, a plurality of continuous bending parts are arranged on the heat exchange tube, and the shapes of the first groove and the second groove are matched with the shape of the heat exchange tube.

As a further development of the plate heat exchanger, both the second medium inlet and the second medium outlet are provided on the second plate body.

As a further improvement of the plate heat exchanger, a supporting piece is further arranged in the first heat exchange flow channel, one end of the supporting piece is abutted with the first plate body and/or the second plate body, and the other end of the supporting piece is abutted with the heat exchange tube.

As a further improvement of the plate heat exchanger, the first plate body is detachably fixed with the second plate body, and the heat exchange tubes are detachably fixed with the first plate body and/or the second plate body.

As a further improvement of the plate heat exchanger, the plate heat exchanger further comprises sealing heads which are respectively positioned at two ends of the heat exchange tubes, the sealing heads are clamped between the first plate body and the second plate body, the heat exchange tubes penetrate through the sealing heads, and the sealing heads are used for forming sealing between the heat exchange tubes and the first plate body and between the heat exchange tubes and the second plate body.

As a further improvement of the plate heat exchanger, a sealing gasket is clamped between the first plate body and the second plate body, a through hole is formed in the sealing gasket, and the through hole corresponds to the first heat exchange flow channel.

As a further improvement of the plate heat exchanger, the heat exchange tubes are titanium tubes.

The plate heat exchanger further comprises at least one second heat exchange unit, wherein the second heat exchange unit comprises the first medium inlet, the first medium outlet, the second medium inlet, the second medium outlet, heat exchange tubes and two second plate bodies, the heat exchange tubes are clamped between the two second plate bodies, a second heat exchange flow channel is formed between the two second plate bodies, the heat exchange tubes are arranged in the second heat exchange flow channel, the first medium inlet and the first medium outlet are respectively connected to two ends of the heat exchange tubes, and the second medium inlet and the second medium outlet are respectively connected to two ends of the second heat exchange flow channel;

the first heat exchange unit is detachably fixed with the second heat exchange unit, and a first heat exchange flow of the first heat exchange unit is communicated with a second heat exchange flow channel of the second heat exchange unit.

The technical effects produced by the utility model are mainly as follows: the independent heat exchange pipes are arranged between the first plate body and the second plate body of the first heat exchange unit and/or between the two second plate bodies of the second heat exchange unit, namely, the heat exchange pipes are independently connected with high-pressure media (such as refrigerants) participating in heat exchange, and the first flow passage or the second flow passage formed between the plate bodies can be connected with low-pressure heat exchange media (such as water); therefore, the problem that in the prior art, the sealing requirements on the plates are high or the descaling is caused after the plates are brazed is avoided, namely, the plates do not need to be sealed in a high-requirement mode, and the plates do not need to be sealed in a brazing mode, so that the convenience of heat exchange use is improved while the heat exchanger is easy to maintain. Furthermore, when the heat exchange amount needs to be increased, one or more second heat exchange units can be stacked on the basis of the first heat exchange unit, for example, the original first heat exchange unit only has one heat exchange capacity, but three heat exchange capacities are needed at present, and at this time, two second heat exchange units are stacked on the first heat exchange unit, so that the heat exchange amount of the heat exchanger is calculated and matched more conveniently, and the use convenience of the plate heat exchanger is further improved.

Drawings

The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular description of preferred embodiments of the utility model, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intentionally drawn to scale on actual size or the like, with emphasis on illustrating the principles of the utility model.

FIG. 1 is a schematic view of a first heat exchange unit in a plate heat exchanger according to the present utility model;

FIG. 2 is a schematic view of a plate heat exchanger according to the present utility model with a side plate removed from a first heat exchange unit;

FIG. 3 is an exploded view of a first heat exchange unit of a plate heat exchanger according to the present utility model;

FIG. 4 is a schematic view of a heat exchange tube according to the present utility model;

FIG. 5 is a schematic view of a gasket seal according to the present utility model;

fig. 6 is a schematic diagram of an assembled structure of a first heat exchange unit and a second heat exchange unit in the present utility model.

Detailed Description

The technical solutions of the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments so that those skilled in the art may better understand the present utility model and implement the same, but the illustrated embodiments are not limiting of the present utility model, and in this embodiment, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present utility model, and do not indicate or imply that the referred devices or elements must have specific orientations, be configured and operated in specific orientations, and therefore should not be construed as limiting of the present utility model.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.

As shown in fig. 1-6, an embodiment of the present utility model provides a plate heat exchanger, which comprises a first heat exchange unit 1, wherein the first heat exchange unit 1 comprises a first plate body 2, a second plate body 3, heat exchange tubes 4, a first medium inlet 5, a first medium outlet 6, a second medium inlet 7 and a second medium outlet 8; the first plate body 2 and the second plate body 3 are detachably fixed through bolts, the heat exchange tube 4 is clamped between the first plate body 2 and the second plate body 3 relative to the thickness direction of the first plate body 2 or the second plate body 3, a first heat exchange flow channel 9 is formed between the first plate body 2 and the second plate body 3, and the heat exchange tube 4 is arranged in the first heat exchange flow channel 9; of course, the inner diameter of the first heat exchange flow channel 9 is larger than the outer diameter of the heat exchange tube 4, or a gap is formed between the inner wall of the first heat exchange flow channel 9 and the outer wall of the heat exchange tube 4, so that the second medium flowing through the first heat exchange flow channel 9 can wrap the heat exchange tube 4, and the heat exchange balance or efficiency of the heat exchanger is higher. Further, compared with the traditional shell-and-tube heat exchanger, the heat exchange coil or the heat exchange tube bundle is directly immersed in the heat exchange medium in the shell, and at the moment, the thickness of the heat exchange medium wrapped outside the heat exchange coil is uneven or inconsistent, so that the heat exchange between the medium inside and outside the heat exchange tube is unbalanced; further, due to the matching between the capacity of the housing and the inlet and outlet of the medium, there may be more or less flow dead zones of the heat exchange medium in the housing (the heat exchange medium in the zone does not substantially participate in the main fluid flow and only moves locally or swirls in situ), i.e. the part of the heat exchange medium located in the flow dead zone cannot effectively contribute to heat exchange, that is, the heat exchange efficiency of the heat exchanger is reduced. Further, the first medium inlet 5 and the first medium outlet 6 are respectively connected at two ends of the heat exchange tube 4, and the second medium inlet 7 and the second medium outlet 8 are respectively connected at two ends of the first heat exchange flow channel 9. Further, the first heat exchange flow channel 9 is used for accessing a second medium (such as water), and the heat exchange tube 4 is accessed with a first medium (such as refrigerant), and the first medium in the heat exchange tube 4 can exchange with the second medium in the first heat exchange flow channel 9 because the heat exchange tube 4 is disposed in the first heat exchange flow channel 9.

As shown in fig. 2, in the preferred embodiment, a first groove is formed on the first plate body 2, a second groove is formed on the second plate body 3, and the first groove corresponds to the second groove and forms a first heat exchange flow channel 9; furthermore, the first groove provided on the first plate 2 and the second groove provided on the second plate 3 are both semicircular, and when the first plate 2 and the second plate 3 are fixed to each other, the first groove and the second groove are corresponding to each other and form the first heat exchange flow channel 9 through which the second medium flows, and meanwhile, the heat exchange tube 4 can be smoothly packaged in the first heat exchange flow channel 9. Further, a plurality of continuous bending parts 10 are arranged on the heat exchange tube 4, and the shapes of the first groove and the second groove are matched with the shape of the heat exchange tube 4; specifically, the bending part 10 is arranged on the heat exchange tube 4, so that the flow of the heat exchange medium in the heat exchange tube 4 can be effectively increased or the tube side of the heat exchange tube 4 is increased, and further, the first medium in the heat exchange tube 4 and the second medium in the first heat exchange flow channel 9 can perform sufficient heat exchange; in other words, the provision of the plurality of bending portions 10 in the heat exchange tube 4 corresponds to enlarging the heat exchange area of the heat exchange tube 4 with respect to the area of the first plate body 2 or the second plate body 3, thereby fully utilizing the upper surface area of the first plate body 2 or the second plate body 3; or, the first heat exchange flow channel 9 forms a sufficient ratio on the first plate body 2 and the second plate body 3, that is, the longer the first heat exchange flow channel 9 formed between the first plate body 2 and the second plate body 3 is, the longer the heat exchange tube 4 with the longer length can be accommodated, so that the heat exchange efficiency of each heat exchange unit is ensured. In this embodiment, the heat exchange tube 4 is continuously bent in an S shape, and at the same time, in order to facilitate the connection of the heat exchange unit pipes, the heat exchange tube 4 is bent in a U shape.

As shown in fig. 1, in the preferred embodiment, the second medium inlet 7 and the second medium outlet 8 are both provided on the second plate 3, while the first plate 2 is not provided with any second medium inlet and outlet; when the heat exchange capacity can be satisfied only by the first heat exchange unit 1, the second medium inlet 7 and the second medium outlet 8 arranged on the second plate body 3 can be used as the total outlet and inlet of the second medium. When the heat exchange capacity cannot be met by using only the first heat exchange heat unit 1, one or more second heat exchange units 14 can be stacked on the basis of the first heat exchange unit 1, that is to say, the second medium inlet 7 and the second medium outlet 8 on the first heat exchange unit 1 and the second heat exchange unit 14 can be connected in parallel.

Further, in the preferred embodiment, a support (not shown) is further disposed in the first heat exchange flow channel 9, one end of the support is abutted against the first plate 2 and/or the second plate 3, and the other end is abutted against the heat exchange tube 4; furthermore, the supporting member may be welded to the heat exchange tube 4, or fixed to the first plate 2 and/or the second plate 3, so that a uniform interval is formed between the outer wall of the heat exchange tube 4 and the inner wall of the first heat exchange channel 9, so that the second medium passing through the first heat exchange channel 9 can exchange heat with the second medium in the heat exchange tube with high efficiency, that is, the heat exchange tube 4 can be uniformly wrapped by the first medium in the first heat exchange channel 9. Further, the supporting member can prevent the heat exchange tube 4 from being in a relatively suspended state in the first heat exchange flow channel 9, so as to prevent or reduce vibration generated by flow impact of the first medium or the second medium, and prevent noise generated by knocking the heat exchange tube 4 with the first plate 2 or the second plate 3 due to vibration.

As shown in fig. 1-3, in a preferred embodiment, the first plate body 2 and the second plate body 3 are detachably fastened by bolts, and the heat exchange tubes 4 are detachably fastened to the first plate body 2 and/or the second plate body 3. Specifically, the heat exchange tube further comprises sealing heads 11, the sealing heads 11 are respectively located at two ends of the heat exchange tube 4, the sealing heads 11 are clamped between the first plate body 2 and the second plate body 3, namely after the first plate 2 and the second plate body 3 are fixed through bolts, the sealing heads 11 can be clamped and fixed in the first heat exchange flow channel 9 at the same time, the heat exchange tube 4 penetrates through the sealing heads 11, the sealing heads 11 are used for forming sealing between the heat exchange tube 4 and the first plate body 2 and the second plate body 3, and therefore second media can only flow through the second media inlet 7 and the second media outlet 8.

As shown in fig. 3 and 5, in the preferred embodiment, a sealing gasket 12 is further clamped between the first plate body 2 and the second plate body 3, and a through hole 13 is formed in the sealing gasket 12, where the through hole 13 corresponds to the first heat exchange flow channel 9. The sealing gasket 12 can improve the sealing performance between the first plate body 2 and the second plate body 3, namely, avoid or reduce the probability of leakage of the second medium from the connecting seam between the first plate body 2 and the second plate body 3. Further, in this embodiment, when the heat exchange tube 4 is a titanium tube and the titanium tube is used as the heat exchange tube 4, the corrosion resistance of the heat exchange tube 4 can be improved in addition to the high pressure of the refrigerant, that is, the water as the second medium may have corrosive substances such as chloride ions, hydrochloric acid, hypochlorous acid (generated by the reaction of chlorine for disinfecting water and water). Of course, if the second medium is relatively less corrosive, heat exchange tubes 4 such as steel or copper tubes may also be used. Furthermore, if the working pressure of the second medium is low, the first plate 2 and the second plate 3 can be made of plastic materials, so as to reduce unnecessary heat dissipation and reduce the manufacturing cost of the heat exchanger.

As shown in fig. 6, there is further provided a plate heat exchanger according to another embodiment, which further includes at least one second heat exchange unit 14, where the second heat exchange unit 14 includes the first medium inlet 5, the first medium outlet 6, the second medium inlet 7, the second medium outlet 8, the heat exchange tube 4 and two second plate bodies 3 as described above, the heat exchange tube 4 is clamped between the two second plate bodies 3, a second heat exchange flow channel (not shown) is formed between the two second plate bodies 3, the heat exchange tube 4 is disposed in the second heat exchange flow channel, the first medium inlet 5 and the first medium outlet 6 are respectively connected at two ends of the heat exchange tube 4, and the second medium inlet 7 and the second medium outlet 8 are respectively connected at two ends of the second heat exchange flow channel. Furthermore, by providing the independent heat exchange tubes 4 between the first plate body 2 and the second plate body 3 of the first heat exchange unit 1 and/or between the two second plate bodies 3 of the second heat exchange unit 14, that is, the high-pressure medium (such as refrigerant) participating in heat exchange is independently connected into the heat exchange tubes 4, and the first flow channel or the second flow channel formed between the plate bodies can be connected into the low-pressure heat exchange medium (such as water); therefore, the problem that in the prior art, the sealing requirements on the plates are high or the descaling is caused after the plates are brazed is avoided, namely, the plates do not need to be sealed in a high-requirement mode, and the plates do not need to be sealed in a brazing mode, so that the convenience of heat exchange use is improved while the heat exchanger is easy to maintain. Furthermore, when the heat exchange amount needs to be increased, one or more second heat exchange units 14 can be stacked on the basis of the first heat exchange unit 1, for example, the original first heat exchange unit 1 only has one heat exchange capacity, but three heat exchange capacities are needed, and at this time, two second heat exchange units 14 are stacked on the first heat exchange unit 1, so that the heat exchange amount of the heat exchanger is calculated and matched more conveniently, and the convenience in use of the plate heat exchanger is further improved

Further, the second heat exchange unit 14 has a substantially identical structure with the first heat exchange unit 1, and since the second medium inlet 7 and the second medium outlet 8 are disposed on the second plate 3, the second medium inlet 7 and the second medium outlet 8 are disposed on both sides of the second heat exchange unit 14 in the thickness direction, that is, when the heat exchange capacity of the heat exchanger needs to be increased, only one or more second heat exchange units need to be stacked on the basis of the first heat exchange unit 1, that is, the second medium inlet 7 and the second medium outlet 8 on one side of the second heat exchange unit are in one-to-one correspondence with and connected to the second medium inlet 7 and the second medium outlet 8 on the first heat exchange unit 1, so that the second medium inlet 7 and the second medium outlet 8 on the other side of the second heat exchange unit become the total inlet and outlet of the second medium. Further, the first medium inlet 5 and the first medium outlet 6 in the second heat exchange unit 14 may be connected in parallel with the first medium inlet 5 and the first medium outlet 6 in the first heat exchange unit 1, for example, when the capacity of the compressor unit is relatively large, such a parallel connection may be used; for another example, when a plurality of compressor sets are used, each compression mechanism may be connected to one of the first heat exchange units 1, respectively. The first heat exchange unit 1 and the second heat exchange unit 14 are detachably fixed through bolts, and a first heat exchange flow of the first heat exchange unit 1 is communicated with a second heat exchange flow channel of the second heat exchange unit 14.

In this specification, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to the terms "preferred embodiment," "another embodiment," "other embodiments," or "specific examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims

1. A plate heat exchanger, characterized in that: including first heat transfer unit, first heat transfer unit includes first plate body, second plate body, heat exchange tube, first medium import, first medium export, second medium import and second medium export, first plate body with the second plate body is detachable fixed, the heat exchange tube clamp is in first plate body with between the second plate body, just first plate body with form first heat transfer runner between the second plate body, the heat exchange tube is arranged in the first heat transfer runner, first medium import with first medium export is connected respectively in the both ends department of heat exchange tube, second medium import with second medium export is connected respectively in the both ends department of first heat transfer runner.

2. A plate heat exchanger according to claim 1, wherein: the first plate body is provided with a first groove, the second plate body is provided with a second groove, and the first groove corresponds to the second groove and forms the first heat exchange flow channel.

3. A plate heat exchanger according to claim 2, wherein: the heat exchange tube is provided with a plurality of continuous bending parts, and the shapes of the first groove and the second groove are matched with the shape of the heat exchange tube.

4. A plate heat exchanger according to any one of claims 1-3, wherein: the second medium inlet and the second medium outlet are both arranged on the second plate body.

5. A plate heat exchanger according to any one of claims 1-3, wherein: and a supporting piece is further arranged in the first heat exchange flow channel, one end of the supporting piece is abutted with the first plate body and/or the second plate body, and the other end of the supporting piece is abutted with the heat exchange tube.

6. A plate heat exchanger according to any one of claims 1-3, wherein: the heat exchange tubes are detachably fixed with the first plate body and/or the second plate body.

7. A plate heat exchanger according to claim 6, wherein: the heat exchange tube comprises a first plate body, a second plate body, a sealing head and a heat exchange tube, wherein the sealing head is respectively positioned at two ends of the heat exchange tube, the sealing head is clamped between the first plate body and the second plate body, the heat exchange tube penetrates through the sealing head, and the sealing head is used for sealing the heat exchange tube with the first plate body and the second plate body.

8. A plate heat exchanger according to any one of claims 1-3, wherein: a sealing gasket is clamped between the first plate body and the second plate body, a through hole is formed in the sealing gasket, and the through hole corresponds to the first heat exchange flow channel.

9. A plate heat exchanger according to any one of claims 1-3, wherein: the heat exchange tube is a titanium tube.

10. A plate heat exchanger, characterized in that: the heat exchange device further comprises at least one second heat exchange unit, wherein the second heat exchange unit comprises a first medium inlet, a first medium outlet, a second medium inlet, a second medium outlet, heat exchange pipes and two second plate bodies, the heat exchange pipes are clamped between the two second plate bodies, a second heat exchange flow channel is formed between the two second plate bodies, the heat exchange pipes are arranged in the second heat exchange flow channel, the first medium inlet and the first medium outlet are respectively connected at two ends of the heat exchange pipes, and the second medium inlet and the second medium outlet are respectively connected at two ends of the second heat exchange flow channel;