Storage tank device

Abstract

The utility model discloses a storage tank device, a containing cavity of a storage tank can contain and store a first medium, the storage tank is provided with a connecting hole communicating with the containing cavity, and a placing piece connected with the storage tank is arranged in the containing cavity. The heat exchange assembly is detachably connected with the storage tank, the heat exchange pipe of the heat exchange assembly can be inserted into the containing cavity through the connecting hole, the second medium flows through the heat exchange pipe to exchange heat with the first medium in the containing cavity, and the heat exchange efficiency is high. The heat exchange assembly is detachably connected with the storage tank, the heat exchange pipe is inserted into the containing cavity through the connecting hole, the whole heat exchange assembly can be detached from the storage tank, the heat exchange pipe can be pulled out of the connecting hole to be cleaned and replaced, the whole heat exchange assembly can be conveniently maintained, and the whole replacement efficiency is improved. The technical problems that a heat exchanger of the storage tank is inconvenient to maintain and medium temperature control in the storage tank is not ideal enough are solved to a certain extent.

Description

Technical Field

[0001] The present application belongs to the technical field of storage tanks, and in particular, relates to a storage tank device. Background Art

[0002] Storage tanks are used to store acids, alkalis, alcohols, gases, liquids and other media. For some storage tanks that have certain temperature requirements, the temperature of the media in the tanks needs to be controlled.

[0003] At present, the storage tank uses a heat exchange coil connected to the storage tank to exchange heat with the medium in the storage tank to control the temperature of the medium. However, the coil has the problems of low heat exchange efficiency and inconvenient maintenance, and the temperature control effect of the medium in the storage tank is not ideal. Utility Model Content

[0004] The present application aims to at least to some extent solve the technical problems of inconvenient maintenance of the heat exchanger of the storage tank and unsatisfactory temperature control of the medium in the storage tank. To this end, the present application provides a storage tank device.

[0005] A storage tank device provided in an embodiment of the present application includes:

[0006] A storage tank, provided with a connecting hole and a containing cavity for containing a first medium, wherein the connecting hole is connected to the containing cavity;

[0007] A placement member, connected to the storage tank and located in the accommodating cavity;

[0008] A heat exchange component is detachably connected to the storage tank, and the heat exchange component includes a heat exchange tube inserted into the accommodating cavity through the connecting hole, and the heat exchange tube is supported by the placement member and is used to flow through a second medium to exchange heat with the first medium.

[0009] In some embodiments, the heat exchange tube has an inlet end and an outlet end, and the heat exchange component further includes:

[0010] A pipe box is detachably connected to the storage tank and connected to the heat exchange tube. The pipe box is provided with an inflow cavity and an outflow cavity for the second medium to flow into in sequence. The inlet end is located in the inflow cavity, and the outlet end is located in the outflow cavity.

[0011] In some embodiments, the storage tank comprises:

[0012] A main body, provided with the accommodating cavity and the connecting hole;

[0013] The cylinder is arranged on the outer surface of the main body and extends along the axial direction of the connecting hole. The cylinder is sealed with the heat exchange component, and the heat exchange tube is inserted into the cylinder, the connecting hole and the accommodating cavity in sequence.

[0014] In some embodiments, the placement member includes at least one placement portion extending along the axial direction of the connecting hole, and the length direction of the heat exchange tube extends along the axial direction of the connecting hole and is supported by at least one of the placement portions.

[0015] In some embodiments, the heat exchange assembly further includes a support plate sleeved on the heat exchange tube, the placement portion is strip-shaped and extends axially along the connecting hole, the support plate is provided with a sliding groove, and is slidably fitted with the placement portion through the sliding groove.

[0016] In some embodiments, the placement member further includes a connecting portion connected to the cavity wall of the accommodating cavity, at least two of the placement portions are arranged in parallel on the connecting portion, and the support plates are each provided with the sliding grooves corresponding to the at least two of the placement portions.

[0017] In some embodiments, the connecting portion is provided with an arc-shaped recessed surface located between two adjacent placement portions, and the supporting plate is a circular plate, and the circular plate is higher than the arc-shaped recessed surface.

[0018] In some embodiments, the heat exchange assembly further includes a plurality of support plates arranged in parallel, and the plurality of heat exchange tubes are sequentially plugged into the plurality of support plates and supported on the placement member by the support plates.

[0019] In some embodiments, the opening of the storage tank is connected to the accommodating cavity and is arranged opposite to the placement member, and the heat exchange tube is located between the placement member and the opening.

[0020] In some embodiments, the storage tank is a symmetrical structure, and at least two of the heat exchange components are respectively arranged on both sides of the symmetry plane of the storage tank.

[0021] Advantageous effects provided by one or more embodiments of the present application:

[0022] The storage tank's accommodating chamber can accommodate and store the first medium. The storage tank is provided with a connecting hole connected to the accommodating chamber. A placement piece connected to the storage tank is arranged in the accommodating chamber to provide support for the heat exchange assembly. The heat exchange assembly is detachably connected to the storage tank, and the heat exchange tube of the heat exchange assembly can be inserted into the accommodating chamber through the connecting hole. The second medium flows through the heat exchange tube to exchange heat with the first medium in the accommodating chamber, and the temperature of the first medium is regulated. The second medium in the heat exchange tube directly exchanges heat with the first medium through the heat exchange tube. The storage tank is equivalent to the tube pass of the heat exchange tube, with high heat exchange efficiency, and there is no need to move or transport the first medium in the storage tank. The heat exchange tube is supported on the placement piece located in the accommodating chamber to ensure stable heat exchange and also help improve the heat exchange efficiency. The heat exchange assembly is detachably connected to the storage tank, and the heat exchange tube is inserted into the accommodating chamber through the connecting hole. The heat exchange assembly as a whole can be disassembled from the storage tank, and the heat exchange tube can be pulled out from the connecting hole for cleaning and replacement, which is convenient for the overall maintenance of the heat exchange assembly and improves the overall replacement efficiency. To a certain extent, it solves the technical problems of inconvenient maintenance of the heat exchanger of the storage tank and unsatisfactory temperature control of the medium in the storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic structural diagram of a storage tank device in some or certain embodiments of the present application is shown.

[0025] Figure 2 A schematic diagram showing the matching relationship between a heat exchange component and a placement piece in some or certain embodiments of the present application is shown.

[0026] Figure 3 A top view of a storage tank device in some or certain embodiments of the present application is shown.

[0027] Figure 4 A top view of another storage tank device in some or certain embodiments of the present application is shown.

[0028] Figure numerals: 1. storage tank; 11. connecting hole; 12. accommodating chamber; 13. main body; 14. cylinder; 2. placing piece; 21. placing part; 22. connecting part; 221. arc-shaped recessed surface; 3. heat exchange component; 31. heat exchange tube; 311. inlet end; 312. outlet end; 32. pipe box; 321. inflow chamber; 322. outflow chamber; 323. partition; 33. flange; 34. stud; 35. nut; 36. gasket; 37. support plate; 371. sliding groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] 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.

[0032] In addition, in the present utility model, descriptions such as "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" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] The present application is described below with reference to the accompanying drawings and specific embodiments. Figure 1 A schematic diagram of the structure of a storage tank device in some or certain embodiments of the present application is shown. Figure 2 A schematic diagram showing the matching relationship between a heat exchange component and a placement member in some or certain embodiments of the present application is shown, with reference to Figure 1 and Figure 2 , a storage tank device provided in an embodiment of the present application includes:

[0034] The storage tank 1 is provided with a connecting hole 11 and a containing cavity 12 for containing a first medium, and the connecting hole 11 is connected to the containing cavity 12 .

[0035] The placement member 2 is connected to the storage tank 1 and is located in the accommodating cavity 12 .

[0036] The heat exchange assembly 3 is detachably connected to the storage tank 1. The heat exchange assembly 3 includes a heat exchange tube 31 inserted into the accommodating cavity 12 through the connecting hole 11. The heat exchange tube 31 is supported on the placement member 2 and is used for flowing through the second medium to exchange heat with the first medium.

[0037] The accommodating chamber 12 of the storage tank 1 can accommodate and store the first medium. The storage tank 1 is provided with a connecting hole 11 connected to the accommodating chamber 12. A placement piece 2 connected to the storage tank 1 is provided in the accommodating chamber 12 to provide support for the heat exchange component 3. The heat exchange component 3 is detachably connected to the storage tank 1, and the heat exchange tube 31 of the heat exchange component 3 can be inserted into the accommodating chamber 12 through the connecting hole 11. The second medium flows through the heat exchange tube 31 to exchange heat with the first medium in the accommodating chamber 12, and the temperature of the first medium is regulated. The second medium in the heat exchange tube 31 directly exchanges heat with the first medium through the heat exchange tube 31. The storage tank 1 is equivalent to the tube path of the heat exchange tube 31, and the heat exchange efficiency is high. There is no need to move or transport the first medium in the storage tank 1. The heat exchange tube 31 is supported on the placement piece 2 located in the accommodating chamber 12 to ensure stable heat exchange and also help improve the heat exchange efficiency. The heat exchange assembly 3 is detachably connected to the storage tank 1, and the heat exchange tube 31 is inserted into the accommodating cavity 12 through the connecting hole 11. The heat exchange assembly 3 can be disassembled from the storage tank 1 as a whole, and the heat exchange tube 31 can be pulled out from the connecting hole 11 for cleaning and replacement, which is convenient for the maintenance of the heat exchange assembly 3 as a whole and improves the overall replacement efficiency. To a certain extent, the technical problems of inconvenient maintenance of the heat exchanger of the storage tank 1 and unsatisfactory temperature control of the medium in the storage tank 1 are solved.

[0038] It should be noted that the first medium and the second medium are both media in nature, and the components of the first medium and the second medium may be the same or different. The temperature difference between the first medium and the second medium can achieve temperature control of the first medium. In some embodiments of the present application, the second medium may be steam or liquid with waste heat discharged from some systems, and the present application does not limit this.

[0039] In some embodiments, the heat exchange tube 31 has an inlet end 311 and an outlet end 312, and the heat exchange component 3 further includes:

[0040] The pipe box 32 is detachably connected to the storage tank 1 and connected to the heat exchange tube 31. The pipe box 32 is provided with an inlet cavity 321 and an outlet cavity 322 for the second medium to flow into in sequence. The inlet end 311 is located in the inlet cavity 321, and the outlet end 312 is located in the outflow cavity 322.

[0041] The pipe box 32 can provide support for the heat exchange tube 31 to increase the stability of heat exchange. The pipe box 32 can also be disassembled from the storage tank 1 to separate the pipe box 32 and the heat exchange tube 31 from the storage tank 1, which is convenient for replacement and maintenance of the heat exchange assembly 3. The pipe box 32 can also allow the second medium to enter the inlet cavity 321 and then flow into the inlet end 311 of the heat exchange tube 31 located in the inlet cavity 321. The second medium flows through the heat exchange tube 31 and then enters the outlet cavity 322 of the pipe box 32 from the outlet end 312 of the heat exchange tube 31. The inlet cavity 321 and the outlet cavity 322 of the pipe box 32 can also provide storage and buffer space for the second medium, which is convenient for controlling the flow rate of the second medium to control the temperature regulation effect.

[0042] In some embodiments, the heat exchange assembly 3 may further include a flange 33, the pipe box 32 may be a pipe body with one end closed, the open end of the pipe body may be detachably connected to the storage tank 1 through the flange 33, the pipe body extends along the axial direction of the connection hole 11, the pipe diameter of the pipe body is larger than the aperture of the connection hole 11, and the pipe box 32 is also provided with a partition 323 extending along the radial direction of the pipe body to the closed end of the pipe body, and the partition 323 divides the space in the pipe body into two, which are respectively configured as an inflow cavity 321 and an outflow cavity 322. The pipe box 32 adopts the above structure, which is convenient for realizing the matching connection between the pipe box 32 and the storage tank 1, and the overall preparation cost is low, and it is also convenient for replacing the heat exchange tube 31.

[0043] In some embodiments, the heat exchange tube 31 can be inserted into the inflow cavity 321 or the outflow cavity 322, and the flange 33 or the pipe box 32 can be provided with a plurality of matching holes of different diameters (not shown in the figure) for matching with the heat exchange tube 31. Heat exchange tubes 31 of different diameters or different numbers can be connected to the flange 33 or the pipe box 32 to match the storage tanks 1 with different temperature requirements. It can also facilitate the replacement and adjustment of the heat exchange tube 31, which is conducive to improving maintenance efficiency.

[0044] In some embodiments, the heat exchange assembly 3 may further include a medium carrier connected to the inflow chamber 321 and a recovery container connected to the outflow chamber 322. This can ensure the stable heat exchange of the storage tank 1 and recover the first medium outflowing from the chamber 322, which is also more environmentally friendly.

[0045] In some embodiments, the flange 33, the pipe box 32 and the storage tank 1 can be connected and fixed by fasteners such as gaskets 36, bolts, studs 34, and nuts 35. It is easy to implement. A sealing ring can be set between the flange 33, the pipe box 32 and the storage tank 1 to achieve sealing cooperation and improve the overall reliability of the storage tank 1.

[0046] In some embodiments, the pipe box 32 and the flange 33 may be located on one side of the outer surface of the storage tank 1 , so as to facilitate the disassembly of the heat exchange component 3 relative to the storage tank 1 .

[0047] In some embodiments, the storage tank 1 comprises:

[0048] The main body 13 is provided with a receiving cavity 12 and a connecting hole 11 .

[0049] The cylinder 14 is disposed on the outer surface of the body 13 and extends along the axial direction of the connecting hole 11 . The cylinder 14 is sealed with the heat exchange component 3 , and the heat exchange tube 31 is inserted into the cylinder 14 , the connecting hole 11 and the accommodating cavity 12 in sequence.

[0050] The body 13 of the storage tank 1 is used to normally contain the first medium. The cylinder 14 on the outer surface of the body 13 can provide space for the installation of the heat exchange component 3 and facilitate the overall maintenance and replacement of the heat exchange component 3.

[0051] In some embodiments, the heat exchange assembly 3 includes a pipe box 32 and a flange 33, and the cylinder 14 and the flange 33 can be sealed by a sealing ring or the like. The flange 33 is coaxially installed at one end of the cylinder 14 away from the storage tank 1, and a sealing ring is provided between the flange 33 and one end of the cylinder 14.

[0052] It should be noted that the surface corresponding to the accommodating cavity 12 is the inner surface of the body 13 , and the outer surface of the body 13 is the surface opposite to the inner surface.

[0053] In some embodiments, the heat exchange assembly 3 further includes a plurality of support plates 37 arranged in parallel, and the plurality of heat exchange tubes 31 are sequentially plugged into the plurality of support plates 37 and supported on the placement member 2 by the support plates 37 .

[0054] The multiple heat exchange tubes 31 in the heat exchange assembly 3 can improve the heat exchange efficiency, and the multiple support plates 37 can provide effective support for the multiple heat exchange tubes 31 to ensure the use stability of the heat exchange tubes 31 to ensure the heat exchange efficiency of the first medium in the storage tank 1.

[0055] In some embodiments, the heat exchange tube 31 may be a U-tube or a fixed tube sheet, which is not limited in the present application.

[0056] In some embodiments, the placement member 2 includes at least one placement portion 21 extending along the axial direction of the connecting hole 11 , and the length direction of the heat exchange tube 31 extends along the axial direction of the connecting hole 11 and is supported by the at least one placement portion 21 .

[0057] The length direction of the heat exchange tube 31 extends along the axial direction of the connecting hole 11, which facilitates the heat exchange tube 31 to be inserted into the accommodating cavity 12 through the connecting hole 11, which is beneficial to increase the heat exchange area to improve the heat exchange efficiency. The placement portion 21 also extends along the axial direction of the connecting hole 11, which facilitates the heat exchange tube 31 to be inserted into the connecting hole 11 and supported on the placement portion 21 of the placement member 2, which facilitates the maintenance and replacement of the heat exchange tube 31. The placement portion 21 also extends along the axial direction of the connecting hole 11, which can ensure the stable support of the heat exchange tube 31 and reduce the space required by the placement member 2 as a whole.

[0058] In some embodiments, the heat exchange assembly 3 also includes a support plate 37 sleeved on the heat exchange tube 31, the placement portion 21 is strip-shaped and extends axially along the connecting hole 11, and the support plate 37 is provided with a sliding groove 371 and is slidably fitted with the placement portion 21 through the sliding groove 371.

[0059] The support plate 37 is sleeved on the heat exchange tube 31 and slidably cooperates with the strip-shaped placement portion 21 through the sliding groove 371, which can facilitate the sliding of the support plate 37 and the heat exchange tube 31 relative to the placement portion 21, and can facilitate the movement and replacement of the heat exchange tube 31.

[0060] In some embodiments, the placement member 2 further includes a connecting portion 22 connected to the cavity wall of the accommodating cavity 12 , at least two placement portions 21 are arranged in parallel on the connecting portion 22 , and the support plate 37 is provided with sliding grooves 371 corresponding to the at least two placement portions 21 .

[0061] The connecting portion 22 can support the placement portion 21, and at least two placement portions 21 cooperate with at least two sliding grooves 371 of the support plate 37 to facilitate the movement and replacement of the heat exchange tube 31. The overall support effect on the heat exchange tube 31 is also good.

[0062] In some embodiments, the connecting portion 22 is provided with an arc-shaped concave surface 221 located between two adjacent placement portions 21, and the support plate 37 is a circular plate, and the circular plate is higher than the arc-shaped concave surface 221. The sliding effect is good, and the heat exchange efficiency between the storage tank 1 and the first medium can be increased while occupying a small space.

[0063] In some embodiments, the placement portion 21 may be a strip structure made of square steel or round steel, and the sliding groove 371 on the support plate 37 may be a matching square groove or round groove. The support plate 37 can slide relative to the placement portion 21, and the connecting portion 22 may be a structure made of square steel or I-beam, which can be connected to the cavity wall of the accommodating cavity 12. This application does not limit this.

[0064] In some embodiments, the opening of the storage tank 1 is connected to the accommodating chamber 12 and is disposed opposite to the placement member 2 , and the heat exchange tube 31 is located between the placement member 2 and the opening.

[0065] The first medium can enter the accommodating chamber 12 from the opening of the storage tank 1 (not shown in the figure), the opening is opposite to the placement piece 2, and the heat exchange tube 31 is located between the placement piece 2 and the opening. The heat exchange tube 31 supported on the placement piece 2 can play a more sufficient heat exchange role for the first medium and improve the heat exchange efficiency.

[0066] In some embodiments, the placement member 2 can be connected to the bottom of the accommodating chamber 12. The heat exchange effect is higher. The placement member 2 can also be arranged on the side of the accommodating chamber 12, which can also improve the heat exchange effect. This application does not limit this.

[0067] Figure 3 A top view of a storage tank device in some or certain embodiments of the present application is shown. Figure 4 A top view of another storage tank device in some or certain embodiments of the present application is shown, referring to Figure 3 and Figure 4 The storage tank device may be provided with one heat exchange component 3 or two heat exchange components 3. In some embodiments, the storage tank 1 is a symmetrical structure, and at least two heat exchange components 3 may be respectively provided on both sides of the symmetry plane of the storage tank 1. The heat exchange efficiency can be improved, and the heat exchange of the first medium is more uniform, and the heat exchange safety is higher.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0069] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. 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 this application.

[0070] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A storage tank device, characterized in that: include: A storage tank, provided with a connecting hole and a containing cavity for containing a first medium, wherein the connecting hole is connected to the containing cavity; A placement member, connected to the storage tank and located in the accommodating cavity; A heat exchange assembly is detachably connected to the storage tank, the heat exchange assembly includes a pipe box and a heat exchange tube inserted into the connecting hole and the accommodating cavity, the heat exchange tube is provided with an inlet end and an outlet end, the heat exchange tube is supported by the placement member and is used to flow through a second medium to exchange heat with the first medium, the pipe box is detachably connected to the storage tank and is located outside the accommodating cavity, the pipe box is connected to the heat exchange tube, the pipe box is provided with an inlet cavity and an outflow cavity with a gap and for sequentially allowing the second medium to flow in and out, the inlet end is located in the inlet cavity, and the outlet end is located in the outflow cavity.

2. The storage tank device according to claim 1, characterized in that: The storage tank comprises: A main body, provided with the accommodating cavity and the connecting hole; The cylinder is arranged on the outer surface of the main body and extends along the axial direction of the connecting hole. The cylinder is sealed with the heat exchange component, and the heat exchange tube is inserted into the cylinder, the connecting hole and the accommodating cavity in sequence.

3. The storage tank device according to claim 1 or 2, characterized in that: The heat exchange assembly further includes a plurality of support plates arranged in parallel, and the plurality of heat exchange tubes are sequentially plugged into the plurality of support plates and supported on the placement member through the support plates.

4. The storage tank device according to claim 1 or 2, characterized in that: The placement member includes at least one placement portion extending along the axial direction of the connecting hole, and the length direction of the heat exchange tube extends along the axial direction of the connecting hole and is supported by at least one of the placement portions.

5. The storage tank device according to claim 4, characterized in that: The heat exchange assembly also includes a support plate sleeved on the heat exchange tube, the placement portion is strip-shaped and extends along the axial direction of the connecting hole, the support plate is provided with a sliding groove, and is slidably matched with the placement portion through the sliding groove.

6. The storage tank device according to claim 5, characterized in that: The placement member further comprises a connection portion connected to the cavity wall of the accommodating cavity, at least two placement portions are arranged in parallel on the connection portion, and the support plates are each provided with the sliding grooves corresponding to the at least two placement portions.

7. The storage tank device according to claim 6, characterized in that: The connecting portion is provided with an arc-shaped concave surface located between two adjacent placement portions, and the supporting plate is a circular plate, and the circular plate is higher than the arc-shaped concave surface.

8. The storage tank device according to claim 1 or 2, characterized in that: The opening of the storage tank is communicated with the accommodating cavity and is arranged opposite to the placement piece, and the heat exchange tube is located between the placement piece and the opening.

9. The storage tank device according to claim 1 or 2, characterized in that: The storage tank is of a symmetrical structure, and at least two of the heat exchange components are respectively arranged on both sides of a symmetric plane of the storage tank.

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