Sealed and leakproof housing components and heat exchangers

Abstract

The present invention discloses a sealed and leakproof housing assembly and a heat exchanger, both of which include: a first end cap, a second end cap and a cylindrical shell, the two ends of the cylindrical shell are penetrated, the two ports of the cylindrical shell are respectively in contact with the first end cap and the second end cap to form a closed cavity, at least two mounting strips located on the outer periphery of the cylindrical shell are arranged between the first end cap and the second end cap, the mounting strips extend along the length direction of the cylindrical shell, the mounting strips are provided with a limiting mechanism for limiting the distance between the first end cap and the second end cap, and the two ends of the mounting strips are respectively connected and fixed on the first end cap and the second end cap. The first end cap, the second end cap and the cylindrical shell are assembled together by using the mounting strips located on the outer periphery of the cylindrical shell, which is convenient for assembly and does not need to occupy the internal cavity of the housing assembly, and the distance between the first end cap and the second end cap is limited by the limiting mechanism to prevent the cylindrical shell from being deformed due to excessive clamping, thereby ensuring the airtightness requirement.

Description

Technical Field

[0001] The invention relates to a sealed and leakproof housing component and a heat exchanger. Background Art

[0002] At present, the housing assembly of some electrical appliances includes a first end cover, a second end cover and a cylindrical housing connected between the first end cover and the second end cover, the left and right ends of the cylindrical housing are penetrated, and the cylindrical housing is clamped and fixed between the first end cover and the second end cover by a long screw, thereby forming a closed cavity. The long screw provides a pulling force to drive the first end cover and the second end cover to approach each other, so that the opening edges of the two ends of the cylindrical housing are respectively pressed against the first end cover and the second end cover, wherein the cylindrical housing is usually composed of a thin-walled metal plate, and the cylindrical housing is easily deformed and twisted when subjected to the above-mentioned clamping force, resulting in insufficient airtightness of the housing assembly. For example, when the housing assembly is used as the outer shell of a condensing heat exchanger, high-temperature smoke will overflow from the gap, affecting the normal use of the product.

[0003] Moreover, the first end cover and the second end cover need to be respectively pre-set with through holes for the long screws to pass through. During assembly, the long screws need to be aligned with the through holes and passed through, which is not convenient for assembly. The long screws also need to occupy the space of the cavity, affecting the utilization rate of the cavity. In addition, the long screws and the through holes need to be sealed to ensure air tightness. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one of the purposes of the present invention is to provide a sealed and leakproof housing assembly, which can prevent the cylindrical shell from deforming to ensure airtightness requirements; the second purpose is to provide a heat exchanger using the sealed and leakproof housing assembly.

[0005] According to the first aspect of the present invention, a sealed and leak-proof housing assembly comprises: a first end cap, a second end cap and a cylindrical shell, wherein the two ends of the cylindrical shell are penetrated, and the two ports of the cylindrical shell respectively contact the first end cap and the second end cap to form a closed cavity, and at least two mounting strips located on the outer periphery of the cylindrical shell are arranged between the first end cap and the second end cap, and the mounting strips extend along the length direction of the cylindrical shell, and the mounting strips are provided with a limiting mechanism for limiting the distance between the first end cap and the second end cap, and the two ends of the mounting strips are respectively connected and fixed to the first end cap and the second end cap.

[0006] The sealed and leakproof housing assembly according to the first aspect of the present invention has at least the following beneficial effects:

[0007] The sealed and leak-proof shell assembly of the above structure utilizes the mounting strip located on the outer periphery of the cylindrical shell to assemble the first end cover, the second end cover and the cylindrical shell together, which is convenient for assembly without occupying the internal volume of the shell assembly. The distance between the first end cover and the second end cover is limited by the limiting mechanism to prevent the cylindrical shell from being deformed due to excessive clamping, thereby ensuring the airtightness requirements.

[0008] In some embodiments of the present invention, the first end cover has a first flange protruding from the outer peripheral wall of the cylindrical shell, the second end cover has a second flange protruding from the outer peripheral wall of the cylindrical shell, and the limiting mechanism includes a first blocking portion and a second blocking portion provided on the mounting strip, the first blocking portion abuts against a side of the first flange close to the second flange, and the second blocking portion abuts against a side of the second flange close to the first flange.

[0009] In some embodiments of the present invention, the mounting strip includes a long sheet and a bent strip formed on both side edges of the long sheet and bent toward the outer peripheral wall of the cylindrical shell, and the two ends of the bent strip respectively constitute the first blocking portion and the second blocking portion.

[0010] In some embodiments of the present invention, a first hook portion opposite to the first blocking portion is provided at one end of the long sheet, and a second hook portion opposite to the second blocking portion is provided at the other end of the long sheet, a first positioning groove for elastic clamping of the first hook portion is provided on the outer side of the first flange, and a second positioning groove for elastic clamping of the second hook portion is provided on the outer side of the second flange.

[0011] In some embodiments of the present invention, the first positioning groove is concavely arranged along the outer side surface of the first flange, the second flange is connected to the side of the second positioning groove with a guide groove, a guide slope is provided between the guide groove and the second positioning groove, and the second hook can climb along the guide slope and move from the guide groove to the second positioning groove.

[0012] In some embodiments of the present invention, the first hook portion is connected to the first end cover by a fastening screw, and / or the second hook portion is connected to the second end cover by a fastening screw.

[0013] In some embodiments of the present invention, the first hook is L-shaped, a clearance hole is provided through the first hook, a threaded column is protruding from the bottom of the first positioning groove and passes through the clearance hole, and a fastening screw can be connected to the threaded column to prevent the first hook from detaching from the first positioning groove; the second hook is U-shaped, and the second end cover is provided with a slot located on one side of the second positioning groove for the end of the second hook to be inserted into.

[0014] In some embodiments of the present invention, the first end cover has a first annular groove for accommodating an edge of a port of the cylindrical shell, the second end cover has a second annular groove for accommodating an edge of another port of the cylindrical shell, and the bent strip abuts against the outer circumferential wall of the cylindrical shell to drive the inner circumferential wall of the cylindrical shell to abut against the inner circumferential side of the first annular groove and the inner circumferential side of the second annular groove.

[0015] In some embodiments of the present invention, the groove width of the first annular groove and the second annular groove are both greater than the wall thickness of the cylindrical shell, the inner circumferential wall of the first annular groove and the inner circumferential wall of the second annular groove are both provided with a plurality of first protrusions at intervals along their extension direction, the outer circumferential wall of the first annular groove and the outer circumferential wall of the second annular groove are both provided with a plurality of second protrusions at intervals along their extension direction, the second protrusions are directly opposite to the area between adjacent first protrusions, the wall panel of the cylindrical shell is located between the first protrusions and the second protrusions, and the first annular groove and the second annular groove are both filled with sealing colloid.

[0016] The heat exchanger according to the second embodiment of the present invention comprises the sealed and leakproof housing assembly described in any of the above technical solutions. The heat exchanger using the sealed and leakproof housing assembly has high internal space utilization and is easy to assemble. The limiting mechanism can prevent the cylindrical housing from being over-clamped and deformed, thereby ensuring the airtightness requirement.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 A schematic structural diagram of an embodiment of a sealed and leakproof housing assembly of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the structural decomposition of an embodiment;

[0021] Figure 3 for Figure 1 A cross-sectional schematic diagram of an embodiment;

[0022] Figure 4 It is a structural schematic diagram when the first hook portion and the first positioning groove are separated;

[0023] Figure 5 It is a structural schematic diagram when the second hook portion and the second positioning groove are separated;

[0024] Figure 6 It is a schematic diagram of the local structure in which the cylindrical shell extends into the first annular groove or the second annular groove.

[0025] Reference numerals:

[0026] The first end cover 100; the first flange 110; the first positioning groove 120; the threaded column 130; the first annular groove 140; the second end cover 200; the second flange 210; the second positioning groove 220; the guide groove 230; the guide ramp 231; the slot 240; the second annular groove 250; the cylindrical shell 300; the mounting strip 400; the first blocking portion 410; the second blocking portion 420; the long strip plate 430; the bent strip 440; the first hook 450; the clearance hole 451; the second hook 460; the first protrusion 510; the second protrusion 520; the guide slope 530. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] See also Figures 1 to 3 The sealed and leakproof housing assembly of the present invention comprises: a first end cover 100, a second end cover 200 and a cylindrical shell 300, wherein the two ends of the cylindrical shell 300 are penetrated, and the two ports of the cylindrical shell 300 are respectively in contact with the first end cover 100 and the second end cover 200 to form a closed cavity, and at least two mounting strips 400 located on the outer periphery of the cylindrical shell 300 are arranged between the first end cover 100 and the second end cover 200, and the mounting strips 400 are extended along the length direction of the cylindrical shell 300, and the mounting strips 400 are provided with a limiting mechanism for limiting the distance between the first end cover 100 and the second end cover 200, and the two ends of the mounting strips 400 are respectively connected and fixed to the first end cover 100 and the second end cover 200.

[0032] The sealed and leakproof housing assembly of the above structure utilizes the mounting strip 400 located on the outer periphery of the cylindrical housing 300 to assemble the first end cap 100, the second end cap 200 and the cylindrical housing 300 together, which is convenient for assembly and does not need to occupy the internal volume of the housing assembly, thereby improving the volume utilization rate. The distance between the first end cap 100 and the second end cap 200 is limited by the limiting mechanism to prevent the cylindrical housing 300 from being deformed due to excessive clamping, thereby ensuring the airtightness requirement. It can be understood that the two ends of the mounting strip 400 connect and fix the first end cap 100 and the second end cap 200 and also limit the distance between the first end cap 100 and the second end cap 200, so that the two ports of the cylindrical housing 300 contact the first end cap 100 and the second end cap 200 respectively to form a closed volume, and the cylindrical housing 300 will not be squeezed along its length direction, and even the cylindrical housing 300 with a thin wall thickness will not affect the airtightness of the housing assembly. The cylindrical shell 300 may be cylindrical, rectangular, or irregularly cylindrical, that is, the cross-sectional shape of the cylindrical shell 300 is not limited, as long as it is surrounded by a sheet and penetrated at both ends.

[0033] See also Figure 1 , Figure 2 , Figure 4 and Figure 5In some embodiments of the present invention, the first end cover 100 has a first flange 110 protruding from the outer peripheral wall of the cylindrical shell 300, and the second end cover 200 has a second flange 210 protruding from the outer peripheral wall of the cylindrical shell 300. The limiting mechanism includes a first blocking portion 410 and a second blocking portion 420 provided on the mounting strip 400, the first blocking portion 410 abuts against a side of the first flange 110 close to the second flange 210, and the second blocking portion 420 abuts against a side of the second flange 210 close to the first flange 110. It can be understood that when the first end cover 100 and the second end cover 200 are pulled by the mounting strip 400, they tend to move toward each other, and the first blocking portion 410 and the second blocking portion 420 respectively abut against the first flange 110 and the second flange 210 to locate the relative position between the first end cover 100 and the second end cover 200. The first blocking portion 410 and the second blocking portion 420 jointly support the first end cover 100 and the second end cover 200. At this time, the cylindrical shell 300 can avoid being squeezed, deformed and twisted while maintaining contact with the first end cover 100 and the second end cover 200, thereby ensuring the assembly accuracy between the first end cover 100, the second end cover 200 and the cylindrical shell 300.

[0034] See also Figure 2 In some embodiments of the present invention, the mounting strip 400 includes a long sheet 430 and a bent strip 440 formed on both side edges of the long sheet 430 and bent toward the outer peripheral wall of the cylindrical shell 300, and the two ends of the bent strip 440 respectively constitute the first blocking portion 410 and the second blocking portion 420. The bent strip 440 and the long sheet 430 are sheet metal of an integral structure, and the first blocking portion 410 and the second blocking portion 420 on the bent strip 440 can be formed by bending, which makes production and processing very convenient and low-cost. Of course, in other embodiments, positioning pins can also be set near the two ends of the mounting strip 400, and the two positioning pins are used to serve as the first blocking portion 410 and the second blocking portion 420 respectively, so as to locate the relative position between the first end cover 100 and the second end cover 200.

[0035] See also Figure 1 , Figure 4 and Figure 5In some embodiments of the present invention, in order to facilitate the connection and fixing of the two ends of the mounting strip 400 on the first end cover 100 and the second end cover 200, one end of the long strip plate 430 is provided with a first hook portion 450 opposite to the first blocking portion 410, and the other end of the long strip plate 430 is provided with a second hook portion 460 opposite to the second blocking portion 420, and the outer side of the first flange 110 is provided with a first positioning groove 120 for elastic clamping of the first hook portion 450, and the outer side of the second flange 210 is provided with a second positioning groove 220 for elastic clamping of the second hook portion 460. That is, the first hook portion 450 and the first blocking portion 410 cooperate to clamp and fix the first flange 110 of the first end cover 100, and the second hook portion 460 and the second blocking portion 420 cooperate to clamp and fix the second flange 210 of the second end cover 200, which is conducive to quick assembly of the mounting strip 400.

[0036] It should be noted that, in a natural state, the distance between the first hook 450 and the second hook 460 is slightly smaller than the distance between the first positioning groove 120 and the second positioning groove 220, so that after being installed, the first hook 450 is elastically clamped in the first positioning groove 120, and the second hook 460 is elastically clamped in the second positioning groove 220. Therefore, it is difficult to assemble the installation bar 400, and if you are not careful, it is easy to cause the installation bar 400 to bend along its length and cause the first hook 450 and the second hook 460 to be excessively deformed. Figure 4 and Figure 5In some embodiments of the present invention, the first positioning groove 120 is concavely arranged along the outer side surface of the first flange 110, and the second flange 210 is connected to a guide groove 230 on the side of the second positioning groove 220. A guide slope 231 is provided between the guide groove 230 and the second positioning groove 220, and the second hook 460 can climb along the guide slope 231 and move from the guide groove 230 to the second positioning groove 220. When assembling the installation bar 400, the first hook 450 is first placed against the outer side surface of the first flange 110, and the first blocking portion 410 is pressed against the side of the first flange 110 close to the second flange 210. At this time, the first hook 450 is in an elastically deformed state, and the second hook 460 is placed in the guide groove 230, and the second hook 460 does not undergo elastic deformation. Then, the user applies force to the installation bar 400 to move the first hook 450 toward the first positioning groove 120. During this process, the second hook 460 is pressed against the guide groove 230. The ramp 231 moves upward along the guide ramp 231, the second blocking portion 420 abuts against the side of the second flange 210 close to the first flange 110, and the second hook 460 produces elastic deformation. When the second hook 460 moves to the top of the guide ramp 231, it can enter the second positioning groove 220. The second hook 460 restores a certain elastic deformation to clamp in the second positioning groove 220, and the first hook 450 also restores a certain elastic deformation to clamp in the first positioning groove 120, thereby completing the assembly of the mounting strip 400.

[0037] See also Figure 1 and Figure 4 In some embodiments of the present invention, in order to limit or prevent the mounting bar 400 from moving away from the cylindrical shell 300 and causing the first hook 450 to detach from the first end cover 100 and the second hook 460 to detach from the second end cover 200, thereby ensuring the structural stability of the outer shell assembly, the first hook 450 is connected to the first end cover 100 by a fastening screw, and / or the second hook 460 is connected to the second end cover 200 by a fastening screw.

[0038] In some embodiments of the present invention, the first hook 450 is L-shaped, and a clearance hole 451 is provided through the first hook 450. The bottom of the first positioning groove 120 is protrudingly provided with a threaded column 130 that passes through the clearance hole 451, and a fastening screw can be connected to the threaded column 130 to prevent the first hook 450 from being separated from the first positioning groove 120; the second hook 460 is U-shaped, and the second end cover 200 is provided with a slot 240 located at one side of the second positioning groove 220 for the end of the second hook 460 to be inserted. It can be understood that when the second hook 460 enters the second positioning groove 220, the end of the second hook 460 is inserted into the slot 240, thereby preventing the second hook 460 from being separated from the second end cover 200 in the direction away from the cylindrical shell 300. The head of the fastening screw presses the first hook 450 against the bottom of the first positioning groove 120. Preferably, the outer contour of the threaded column 130 matches the clearance hole 451 to prevent the first hook 450 from moving in any direction. The threaded hole of the threaded column 130 is a countersunk hole, so there is no need to consider the problem of air tightness being damaged due to the fastening screw being connected to the threaded column 130.

[0039] See also Figure 2 , Figure 3 and Figure 6 In some embodiments of the present invention, in order to define the assembly relationship between the cylindrical shell 300, the first end cover 100 and the second end cover 200, the first end cover 100 has a first annular groove 140 for accommodating a port edge of the cylindrical shell 300, and the second end cover 200 has a second annular groove 250 for accommodating another port edge of the cylindrical shell 300, and the bent strip 440 abuts against the outer peripheral wall of the cylindrical shell 300 to drive the inner peripheral wall of the cylindrical shell 300 to abut against the inner peripheral side of the first annular groove 140 and the inner peripheral side of the second annular groove 250. When assembling the cylindrical shell 300, the first end cover 100 and the second end cover 200 together, the two ports of the cylindrical shell 300 are respectively inserted into the first annular groove 140 and the second annular groove 250, and then the two ends of the mounting strip 400 are respectively connected and fixed to the first end cover 100 and the second end cover 200. At this time, the bending strip 440 presses the inner circumferential wall of the cylindrical shell 300 against the inner circumferential side of the first annular groove 140 and the inner circumferential side of the second annular groove 250, thereby preventing the cylindrical shell 300 from moving along the groove width direction of the first annular groove 140 and the second annular groove 250, thereby ensuring the structural stability of the shell assembly, and the bending strip 440 can also strengthen the structural strength of the thin-walled cylindrical shell 300 along its length direction, and the two ends of the bending strip 440 also constitute the first blocking portion 410 and the second blocking portion 420, thereby achieving the effect of one object with multiple uses, which is very clever.

[0040] See also Figure 6In some embodiments of the present invention, in order to facilitate the two ports of the cylindrical shell 300 to extend into the first annular groove 140 and the second annular groove 250 respectively, and reduce the probability of interference between the cylindrical shell 300 and the first annular groove 140 or the second annular groove 250 to facilitate production and assembly, the groove widths of the first annular groove 140 and the second annular groove 250 are both greater than the wall thickness of the cylindrical shell 300, and the inner circumferential walls of the first annular groove 140 and the second annular groove 250 are both spaced apart along their extension direction. A plurality of first protrusions 510 are provided at intervals on the outer circumferential walls of the first annular groove 140 and the second annular groove 250. The outer peripheral wall of the cylindrical shell 300 is provided with a plurality of second protrusions 520 at intervals along its extension direction, and the second protrusions 520 are directly opposite to the area between the adjacent first protrusions 510, and the wall plate of the cylindrical shell 300 is located between the first protrusions 510 and the second protrusions 520, so as to locate the position of the cylindrical shell 300 at multiple positions in the circumferential direction of the cylindrical shell 300 and correct the shape deviation of the cylindrical shell 300 after molding. In order to further improve the air tightness and prevent the gas in the shell assembly from overflowing outward, so as to be suitable for the use scenario of the gas wall-mounted boiler, the first annular groove 140 and the second annular groove 250 are filled with sealing colloid. In some embodiments, in order to prevent the cylindrical shell 300 from being stuck when inserted into the first annular groove 140 and the second annular groove 250, the first protrusion 510 and the second protrusion 520 are also provided with a guiding inclined surface 530 facing the port edge of the cylindrical shell 300.

[0041] The present invention also discloses a heat exchanger, comprising the sealed and leakproof housing assembly described in any of the above technical solutions. The heat exchanger using the sealed and leakproof housing assembly has high internal space utilization and is easy to assemble. The limiting mechanism can prevent the cylindrical housing 300 from being over-clamped and deformed, thereby ensuring the airtightness requirement.

[0042] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sealed and leakproof housing assembly, characterized in that: include: A first end cover (100), a second end cover (200) and a cylindrical shell (300), wherein both ends of the cylindrical shell (300) are penetrated, and two ports of the cylindrical shell (300) are respectively in contact with the first end cover (100) and the second end cover (200) to form a closed cavity, and at least two installation strips (400) located on the outer periphery of the cylindrical shell (300) are arranged between the first end cover (100) and the second end cover (200), and the installation strips (400) are extended along the length direction of the cylindrical shell (300). 00) is provided with a limiting mechanism for limiting the distance between the first end cover (100) and the second end cover (200), and the two ends of the mounting strip (400) are respectively connected and fixed to the first end cover (100) and the second end cover (200); the first end cover (100) has a first flange (110) protruding from the outer peripheral wall of the cylindrical shell (300), and the second end cover (200) has a second flange (210) protruding from the outer peripheral wall of the cylindrical shell (300), and the limiting mechanism includes a first blocking portion (410) provided on the mounting strip (400) The first blocking portion (410) is against the side of the first flange (110) close to the second flange (210), and the second blocking portion (420) is against the side of the second flange (210) close to the first flange (110); the mounting strip (400) includes a long sheet (430) and a bent sheet (440) formed on both side edges of the long sheet (430) and bent toward the outer peripheral wall of the cylindrical shell (300), and the two ends of the bent sheet (440) respectively constitute the first blocking portion (410) and the second blocking portion (420). The first end cover (100) has a first annular groove (140) for accommodating an edge of one port of the cylindrical shell (300), and the second end cover (200) has a second annular groove (250) for accommodating an edge of another port of the cylindrical shell (300), and the bent strip (440) abuts against the outer peripheral wall of the cylindrical shell (300) to drive the inner peripheral wall of the cylindrical shell (300) to abut against the inner peripheral side of the first annular groove (140) and the inner peripheral side of the second annular groove (250);The groove widths of the first annular groove (140) and the second annular groove (250) are both greater than the wall thickness of the cylindrical shell (300); the inner circumferential walls of the first annular groove (140) and the second annular groove (250) are both provided with a plurality of first protrusions (510) at intervals along their extension direction; the outer circumferential walls of the first annular groove (140) and the second annular groove (250) are both provided with a plurality of second protrusions (520) at intervals along their extension direction; the second protrusions (520) are directly opposite to the area between adjacent first protrusions (510); the wall plate of the cylindrical shell (300) is located between the first protrusions (510) and the second protrusions (520); and the first annular groove (140) and the second annular groove (250) are both filled with sealing colloid. ; 2. The leakproof housing assembly according to claim 1, characterized in that: One end of the long sheet (430) is provided with a first hook portion (450) opposite to the first blocking portion (410), and the other end of the long sheet (430) is provided with a second hook portion (460) opposite to the second blocking portion (420), the outer side of the first flange (110) is provided with a first positioning groove (120) for elastic clamping of the first hook portion (450), and the outer side of the second flange (210) is provided with a second positioning groove (220) for elastic clamping of the second hook portion (460).

3. The leakproof housing assembly according to claim 2, characterized in that: The first positioning groove (120) is concavely arranged along the outer side surface of the first flange (110); the second flange (210) is connected with a guide groove (230) at the side of the second positioning groove (220); a guide slope (231) is provided between the guide groove (230) and the second positioning groove (220); the second hook (460) can climb along the guide slope (231) and move from the guide groove (230) to the second positioning groove (220).

4. The leakproof housing assembly according to claim 3, characterized in that: The first hook portion (450) is connected to the first end cover (100) by means of a fastening screw, and / or the second hook portion (460) is connected to the second end cover (200) by means of a fastening screw.

5. The leakproof housing assembly according to claim 4, characterized in that: The first hook portion (450) is L-shaped, and a clearance hole (451) is provided through the first hook portion (450). A threaded column (130) is protruding from the bottom of the first positioning groove (120) and is provided through the clearance hole (451). A fastening screw can be connected to the threaded column (130) to prevent the first hook portion (450) from escaping from the first positioning groove (120); the second hook portion (460) is U-shaped, and the second end cover (200) is provided with a slot (240) located on one side of the second positioning groove (220) for the end of the second hook portion (460) to be inserted.

6. A heat exchanger, characterized in that include: A sealed and leakproof housing assembly according to any one of claims 1 to 5.

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