CN114061150B

CN114061150B - Heat exchanger and water heating apparatus

Info

Publication number: CN114061150B
Application number: CN202010748870.2A
Authority: CN
Inventors: 毛罗; 梁国荣; 康道远
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2023-04-07
Anticipated expiration: 2040-07-29
Also published as: WO2022021398A1; CN114061150A

Abstract

The invention discloses a heat exchanger and a water heating device, wherein the heat exchanger comprises a shell cover and a heat exchange body, wherein an opening is formed in the shell cover; the heat exchange body is detachably arranged in the shell cover and can be taken out of the shell cover through the opening. The heat exchanger can be disassembled from the shell cover, so that the heat exchanger can be thoroughly cleaned, the heat exchanger is effectively prevented from being blocked, and the heat exchange effect of the heat exchanger is improved.

Description

Heat exchanger and water heating apparatus

Technical Field

The invention relates to the technical field of domestic appliances, in particular to a heat exchanger and a water heating device.

Background

In the related art, the entire heat exchanger of the wall-hanging stove or the water heater is fixedly installed on the boiler frame. The heat exchanger comprises a shell and a heat exchange body, wherein the heat exchange body consists of one or more coils, the coils are flushed by high-temperature flue gas generated by fuel combustion in a combustion chamber, and heat of the high-temperature flue gas is transferred to circulating fluid in the coils through the coils, so that the fluid is heated. However, for the heat exchanger, the surface of the heat exchange body corresponding to the combustion chamber can only be cleaned, that is, the windward side of the heat exchange body to the high-temperature flue gas cannot be cleaned completely, which easily causes the blockage of the flue gas channel of the heat exchange body, thus greatly affecting the use performance of the heat exchanger.

The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.

Disclosure of Invention

The invention mainly aims to provide a heat exchanger, and aims to solve the technical problem that a smoke channel is blocked because the conventional heat exchanger cannot thoroughly clean a heat exchange body.

To achieve the above object, the present invention provides a heat exchanger comprising:

the shell cover is provided with an opening; and

the heat exchange body is detachably arranged in the shell cover, and the heat exchange body can be taken out of the shell cover through the opening.

In one embodiment, the heat exchange body includes a coil assembly that is removable from within the enclosure through the opening.

In one embodiment, the heat exchanger further comprises:

the cover plate is arranged at the opening of the shell cover in a covering mode; and

the combustor subassembly, the combustor subassembly with the apron sets up for integrated into one piece, perhaps, the combustor subassembly with the apron can be dismantled and be connected.

In an embodiment, the heat exchanger further includes a fixing member, and an end of the coil assembly facing away from the opening is detachably connected to the cover plate through the fixing member.

In an embodiment, the fixing member includes a connecting portion and a limiting portion connected to the connecting portion, the connecting portion is connected to the cover plate, and the limiting portion abuts against an end of the coil pipe assembly away from the opening to fix the coil pipe assembly to the cover plate.

In an embodiment, the number of the connecting portions is two, the two connecting portions are arranged at intervals along the circumferential direction of the coil assembly, and two ends of the limiting portion are respectively connected with the two connecting portions.

In one embodiment, the number of the fixing pieces is two, and the two fixing pieces are symmetrically arranged by taking the cross-sectional diameter of the coil pipe assembly as a central axis.

In an embodiment, the heat exchanger further includes a heat insulation plate and a fixing rod, the heat insulation plate is installed at one end of the coil assembly away from the opening, a first limiting groove is formed on a limiting portion of one of the two fixing members, a second limiting groove is formed on a limiting portion of the other fixing member, and the fixing rod penetrates through the first limiting groove and the second limiting groove to fix the heat insulation plate at the end of the coil assembly away from the opening.

In an embodiment, the number of the first limiting grooves and the number of the second limiting grooves are multiple, the number of the fixing rods is multiple, one end of each fixing rod is inserted into one corresponding first limiting groove, and the other end of each fixing rod is inserted into one corresponding second limiting groove.

In an embodiment, the number of the first limiting grooves, the number of the second limiting grooves and the number of the fixing rods are two, and one ends of the two fixing rods are connected with each other to form a U-shaped arrangement.

In one embodiment, the coil assembly is detachably connected with the cover plate near one end of the opening; or

The heat exchanger further comprises a fixing piece, the coil pipe assembly is close to the open end and detachably connected with the cover plate, and the coil pipe assembly deviates from the open end and is detachably connected with the cover plate through the fixing piece.

In one embodiment, the coil assembly includes a spiral coil and a partition, the partition includes a fixing portion and a plurality of partition portions, the fixing portion extends along an axial direction of the spiral coil, and the plurality of partition portions are disposed on the fixing portion at intervals along the axial direction of the spiral coil; the separating part is arranged between two annular pipe sections which are axially adjacent to each other of the spiral coil pipe.

In an embodiment, the coil pipe assembly includes spiral coil pipe and separator, the separator includes fixed part and a plurality of partition portion, the fixed part is followed spiral coil pipe's axial extension, and is a plurality of the partition portion is followed spiral coil pipe's axial interval set up in on the fixed part, the partition portion set up in between two adjacent ring-shaped pipe sections of spiral coil pipe axial, deviating from of fixed part spiral coil pipe's on the surface be formed with the third spacing groove, connecting portion install in the third spacing inslot.

In one embodiment, the coil assembly comprises at least one spiral coil, the spiral coil comprises a plurality of annular pipe sections arranged along the axial direction of the spiral coil, each annular pipe section is provided with two side faces oppositely arranged along the axial direction of the spiral coil, and at least one side face is convexly provided with a limiting protrusion.

In an embodiment, one of the two side surfaces of the annular pipe section is a plane, the other side surface is an arc surface, and the limiting protrusion is formed on the plane.

In one embodiment, the coil assembly comprises at least one helical coil, and the windward side of the helical coil is cambered.

In one embodiment, the cover plate is provided with a water inlet and a water outlet, the water inlet of the coil pipe assembly is communicated with the water inlet of the cover plate, and the water outlet of the coil pipe assembly is communicated with the water outlet of the cover plate.

In an embodiment, a first connecting pipe is arranged at the water inlet of the cover plate, a second connecting pipe is arranged at the water outlet of the cover plate, and the first connecting pipe and the second connecting pipe are flexible pipes or detachable rigid pipes.

In an embodiment, one of the cover plate and the housing is provided with a first engaging portion, and the other is provided with a second engaging portion engaged with the first engaging portion, the first engaging portion is a hook, and the second engaging portion is a buckle.

In one embodiment, the heat exchanger further comprises a burner assembly, the burner assembly comprises a cover body and a combustion cylinder connected with the cover body, the cover body is detachably connected with the cover plate, the combustion cylinder penetrates through the cover plate and extends into the shell cover, and the coil assembly is located on the periphery of the combustion cylinder.

The invention also proposes a water heating device comprising a heat exchanger, said heat exchanger comprising:

the shell cover is provided with an opening; and

In the invention, the heat exchange body of the heat exchanger is detachably arranged in the shell cover from the opening of the shell cover, so that the heat exchange body can be detached from the opening of the shell cover, thereby realizing thorough cleaning of the heat exchange body. That is to say, not only can clean the surface in the heat exchange body corresponds the combustion chamber, the windward side of heat exchange body to high temperature flue gas promptly, can also clean the surface outside the heat exchange body corresponds the combustion chamber, the leeward side of heat exchange body to high temperature flue gas promptly, the flue gas passageway of having avoided the heat exchange body effectively takes place to block up, has promoted this heat exchanger's heat transfer effect, simultaneously, has effectively avoided the heat exchange body to take place to corrode, has prolonged this heat exchanger's life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a heat exchanger according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a schematic view of a partially exploded structure of the heat exchanger of FIG. 1;

FIG. 4 is a schematic view of the heat exchanger shown in FIG. 1 from another perspective;

FIG. 5 is a perspective view of the cover plate and the heat exchange body of FIG. 3;

FIG. 6 is a partial enlarged view of the portion B in FIG. 5;

FIG. 7 is a schematic view of an alternative perspective assembly of the cover plate and heat exchange body of FIG. 5;

FIG. 8 is a schematic diagram of an embodiment of the spiral coil of FIG. 3;

fig. 9 is a schematic structural view of the housing and the sealing ring in fig. 3.

The reference numbers indicate:

the objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be noted that, if the description of "first", "second", etc. is provided in the embodiments of the present invention, the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.

The invention provides a heat exchanger.

Referring to fig. 1, 2 and 3, a heat exchanger 600 according to the present invention includes a housing 100 and a heat exchange body 300, wherein the heat exchange body 300 is detachably mounted in the housing 100, and the heat exchange body 300 can be taken out from the housing 100 through the opening.

In an embodiment of the present invention, the heat exchanger 600 is a fully premixed combustion condensing heat exchanger 600. In the heat exchanger 600, the housing 100 is made of a plastic or aluminum material. The shell 100 is provided with a flue gas outlet 110, and a smoke exhaust pipe 120 is arranged at the flue gas outlet 110. The housing 100 is formed at an inner portion thereof with a housing chamber (not shown) in which the heat exchange body 300 is detachably mounted. The combustion chamber G (as shown in fig. 5) is formed inside the heat exchange body 300, the surface of the heat exchange body 300 corresponding to the combustion chamber G is washed by high-temperature flue gas generated by the combustion of fuel in the combustion chamber G, and the heat of the high-temperature flue gas is transferred to the circulating fluid in the heat exchange body 300 through the heat exchange body 300, so that the fluid is heated. Meanwhile, high-temperature flue gas generated by combustion of fuel in the combustion chamber G can flow to the smoke exhaust duct 120 through the flue gas channel of the heat exchange body 300 and is exhausted through the smoke exhaust duct 120. It can be understood that if the heat exchange body 300 cannot be cleaned completely, the flue gas channel of the heat exchange body 300 may be blocked, which may result in poor fuel combustion in the combustion chamber G, increase pollutant discharge, and may also affect the heat exchange effect of the heat exchanger 600, and may also cause corrosion of the pipeline, which may affect the service life of the heat exchanger 600.

The heat exchanger 600 of the present invention detachably mounts the heat exchange body 300 in the housing cover 100 from the opening of the housing cover 100, so that the heat exchange body 300 can be detached from the opening of the housing cover 100, thereby enabling thorough cleaning of the heat exchange body 300. That is to say, not only can clean the surface in heat exchange body 300 corresponds the combustion chamber G, heat exchange body 300 is to the windward side of high temperature flue gas promptly, can also clean the surface outside heat exchange body 300 corresponds the combustion chamber G, heat exchange body 300 is to the leeward side of high temperature flue gas promptly, the flue gas passageway of having avoided heat exchange body 300 effectively takes place to block up, the heat transfer effect of this heat exchanger 600 has been promoted, and simultaneously, effectively avoided heat exchange body 300 to take place to corrode, the life of this heat exchanger 600 has been prolonged.

The structure of the heat exchange body 300 may be various, and is not particularly limited. For example, in one embodiment, the heat exchange body 300 includes a coil assembly 300a, and the coil assembly 300a is removably mounted in the housing 100 and can be removed from the housing 100 through the opening. Of course, it is understood that in other embodiments, the heat exchange body 300 includes a waterway plate assembly (not shown), but is not limited thereto. The coil assembly 300a will be described in detail below.

The inside of the coil assembly 300a forms a combustion chamber G (as shown in fig. 5), the surface of the coil assembly 300a corresponding to the combustion chamber G is washed by high-temperature flue gas generated by the combustion of fuel in the combustion chamber G, and the heat of the high-temperature flue gas is transferred to the circulating fluid in the coil assembly 300a through the coil assembly 300a, so that the fluid is heated. Meanwhile, high-temperature flue gas generated by the combustion of the fuel in the combustion chamber G can flow to the smoke exhaust duct 120 through a flue gas channel between two adjacent annular pipe sections of the coil assembly 300a, and is exhausted through the smoke exhaust duct 120. It can be understood that if the coil assembly 300a cannot be cleaned completely, it is likely to cause the flue gas channel between two adjacent annular pipe sections of the coil assembly 300a to be blocked, thereby causing poor fuel combustion in the combustion chamber G, increasing pollutant emissions, even causing the boiler itself to be shut down, and simultaneously affecting the heat exchange effect of the heat exchanger 600, and in addition, causing corrosion of the pipes, and affecting the service life of the heat exchanger 600.

In an embodiment of the present invention, the heat exchanger 600 further includes a cover plate 200 and a burner assembly 400. The cover plate 200 covers the opening of the casing 100, and the cover plate 200 may be made of aluminum, aluminum alloy, steel, or stainless steel. The structure of the cover plate 200 may be various, and is not particularly limited. For example, in one embodiment, the cover plate 200 may be disposed in a ring shape, and the ring-shaped cover plate 200 covers the open edge of the housing 100 (as shown in fig. 3). In this embodiment, the burner assembly 400 is removably attached to the cover plate 200, and the burner assembly 400 may extend through the annular cover plate 200 into the combustion chamber G. In another embodiment, the cover plate 200 may be integrally formed with the burner assembly 400, such that the cover plate 200 and the burner assembly 400 cooperate to cover the open mouth of the casing 100.

The cover plate 200 may be removably attached to the housing 100 such that the cover plate 200 may be removed to facilitate removal of the coil assembly 300a. The cover plate 200 can be detachably connected to the housing 100 in various ways, such as a snap connection, a screw connection, or a snap connection. Referring to fig. 1 and fig. 2, in an embodiment, in order to facilitate detaching the cover plate 200 from the housing 100, a first fastening portion 210 may be disposed on one of the cover plate 200 and the housing 100, and a second fastening portion 140 that is fastened with the first fastening portion 210 may be disposed on the other. Specifically, the first fastening portion 210 is a hook (as shown in fig. 4), and the second fastening portion 140 is a buckle. However, the first clip portion 210 may be a clip groove, and the second clip portion 140 may be a clip. Of course, the cover plate 200 and the housing 100 may be movably connected, such as rotatably connected, and is not limited in this respect.

Referring to fig. 3, the cover plate 200 is connected to the coil assembly 300a, which may be a fixed connection, such as a welded connection; but may also be a detachable connection, such as a snap connection, a screw connection, or a snap connection, etc., and is not limited herein. The housing 100 has a first direction corresponding to the axial direction of the coil assembly 300a, and when the cover plate 200 is separated from the opening along the first direction, the coil assembly 300a is taken out from the housing 100 through the opening. By connecting the coil assembly 300a to the cover plate 200, when the cover plate 200 is removed, the coil assembly 300a can be simultaneously taken out from the housing 100 through the opening. Thus, the coil assembly 300a is more convenient to disassemble, and the coil assembly 300a is convenient to clean thoroughly. Specifically, the coil assembly 300a is detachably connected to the cover plate 200 near the open end (front end); and/or, the heat exchanger 600 further comprises a fixing member 340, and the end (rear end) of the coil assembly 300a facing away from the opening is detachably connected with the cover plate 200 through the fixing member 340.

Referring to fig. 5 and fig. 7, in an embodiment, the fixing member 340 includes a connecting portion 341 and a limiting portion 342 connected to the connecting portion 341, the connecting portion 341 is connected to the cover plate 200, and the limiting portion 342 abuts against an end of the coil assembly 300a away from the opening, so as to fix the coil assembly 300a to the cover plate 200.

In this embodiment, the fixing element 340 may be integrally formed, or may be separately formed, and is not particularly limited. One end of the connection portion 341 may be connected to the cap plate 200 by a screw or a snap connection, and the other end of the connection portion 341 is connected to the stopper portion 342. The coil assembly 300a is fixed on the cover plate 200 by the fixing member 340, so that the installation reliability and stability of the coil assembly 300a are improved. The fixing member 340 extends along the axial direction of the coil assembly 300a, and the fixing member 340 may be disposed in a rod shape or a plate shape, and is not specifically limited herein as long as it can fix the spiral coil 310.

The number of the connection portions 341 is not particularly limited, and for example, the number of the connection portions 341 is one, two, or more. Referring to fig. 7, the number of the connecting portions 341 is two, the two connecting portions 341 are disposed at intervals along the circumferential direction of the coil assembly 300a, and two ends of the limiting portion 342 are respectively connected to the two connecting portions 341. The coil assembly 300a can be better press-fastened to the cover plate 200 by the engagement of the two connecting portions 341 and the stopper portion 342.

It should be noted that in this embodiment, in order to increase the contact area between the position-limiting portion 342 and the rear end of the coil assembly 300a, and thus to better fix the coil assembly 300a to the cover plate 200, the position-limiting portion 342 may be designed to be a bent structure (as shown in fig. 7). In addition, in this embodiment, the number of the fixing members 340 is not particularly required, and may be one, two, or more. Referring to fig. 7, in some embodiments, the number of the fixing members 340 is two, and the two fixing members 340 are symmetrically arranged with respect to the cross-sectional diameter of the coil assembly 300a as a central axis. In this manner, the coil assembly 300a can be more stably fixed to the cover plate 200. Of course, the two fixing members 340 may not be arranged with the cross-sectional diameter of the coil assembly 300a as the central axis. It is worth mentioning that the fixing member 340 not only can fixedly connect the spiral coil 310 and the cover plate 200, but also the fixing member 340 can fixedly connect the cover plate 200 and the burner assembly 400, which will be described in detail below.

Referring to fig. 7, the heat exchanger 600 further includes an insulating plate 330, wherein the insulating plate 330 is mounted on an end of the coil assembly 300a facing away from the opening. The heat insulation plate 330 can shield heat generated in the combustion chamber G to prevent other components in the housing cover 100 from being burned out. Specifically, heat insulating disk 330 includes fixed disk 331 and heat insulating board, fixed disk 331 install in coil assembly 300a deviates from open one end, the heat insulating board is located fixed disk 331 is close to open one side and with fixed disk 331 can dismantle the connection. The thermal insulation board is installed at the rear end of the spiral coil 310 and detachably connected to the fixed disk 331, so that the thermal insulation board is more conveniently disassembled and assembled.

In order to fix the heat insulation plate 330 at the rear end of the spiral coil 310, a fixing rod 350 may be used to cooperate with the fixing members 340 to fix the heat insulation plate 330 at the end of the coil assembly 300a away from the opening, for example, referring to fig. 7, in two fixing members 340, a first limiting groove 344 is formed on the limiting portion 342 of one of the fixing members 340, a second limiting groove 345 is formed on the limiting portion 342 of the other fixing member 340, and the heat exchanger 600 further includes a fixing rod 350, wherein the fixing rod 350 passes through the first limiting groove 344 and the second limiting groove 345 to fix the heat insulation plate 330 at the end of the coil assembly 300a away from the opening.

The number of the first and second catching

grooves

344 and 345 is not particularly limited. For example, in one embodiment, the number of the first position-limiting grooves 344 and the second position-limiting grooves 345 is multiple, the number of the fixing rods 350 is multiple, one end of each fixing rod 350 is inserted into a corresponding first position-limiting groove 344, and the other end of each fixing rod 350 is inserted into a corresponding second position-limiting groove 345. In this embodiment, the fixing bar 350 may be linearly disposed.

For another example, in another embodiment, the number of the first position-limiting grooves 344, the second position-limiting grooves 345 and the fixing rods 350 is two, and one ends of the two fixing rods 350 are connected to each other to form a U-shape. In this embodiment, two first limiting grooves 344 are disposed on the limiting portion 342 of one of the fixing members 340, and two second limiting grooves 345 are correspondingly disposed on the limiting portion 342 of the other fixing member 340, so that two ends of the U-shaped fixing rod 350 respectively pass through the first limiting grooves 344 and the second limiting grooves 345 in sequence, thereby fixing the heat insulation plate 330 to the end of the coil assembly 300a away from the opening. Here, the U-shaped fixing rod 350 is designed to improve the stability of the installation of the thermal insulation plate 330 and the spiral coil 310 on the one hand, and simplify the installation and fixation of the thermal insulation plate 330 and the coil assembly 300a on the other hand, so that the installation and detachment of the thermal insulation plate 330 and the coil assembly 300a are easier.

There is no limitation on the opening directions of the notches of the first and second retaining

grooves

344 and 345. Referring to fig. 7, in an embodiment, the opening directions of the notches of the first and second limiting

grooves

344 and 345 are both disposed toward the opening. Thus, the fixing rod 350 can be well limited in the first limiting groove 344 and the second limiting groove 345. It will be appreciated that in another embodiment, the opening directions of the notches of the first and second limiting

grooves

344 and 345 may be set back to the opening. In this embodiment, the notch of the first position-limiting groove 344 is tapered toward the opening, and the notch of the second position-limiting groove 345 is tapered toward the opening.

Referring to fig. 5-8, the structure of the helical coil 310 will be described in detail.

Without loss of generality, the coil assembly 300a includes a helical coil 310, the helical coil 310 being disposed in a helical arrangement including a plurality of annular tube segments disposed axially therealong. Wherein the number of the spiral coil 310 is at least one, and the spiral coil 310 may be made of stainless steel, aluminum alloy, or the like.

In some embodiments, a partition may be disposed between two adjacent annular tube sections to form a flue gas channel between the two adjacent annular tube sections, so that high-temperature flue gas generated by the combustion of fuel in the combustion chamber G can be discharged and flow into the smoke exhaust duct 120. Here, the specific structure of the separator is not limited. For example, referring to fig. 5, 6 and 7, the coil assembly 300a includes a partition 320, the partition 320 includes a fixing portion 321 and a plurality of separating portions 324, the fixing portion 321 extends along an axial direction of the spiral coil 310, and the plurality of separating portions 324 are disposed on the fixing portion 321 at intervals along the axial direction of the spiral coil 310; the partition 324 is disposed between two axially adjacent annular sections of the spiral coil 310 to form a first flue gas channel between the two adjacent annular sections.

In this embodiment, in order to avoid the partition 324 being disposed between two adjacent annular sections of the spiral coil 310 to block the flue gas passage at the position, so that the high-temperature flue gas in the combustion chamber G can be better discharged through the first flue gas passage, a plurality of exhaust ports 323 may be disposed at the fixed portion 321 at intervals along the axial direction of the spiral coil 310, and each partition 324 is formed at the edge of a corresponding one of the exhaust ports 323 (as shown in fig. 6).

In addition, referring to fig. 6 and 7, a third limiting groove 322 is formed on a surface of the fixing portion 321 facing away from the spiral coil 310, and the connecting portion 341 is installed in the third limiting groove 322. In this embodiment, by installing the connection portion 341 in the third limiting groove 322, the connection portion 341 can be prevented from sliding along the circumferential direction of the coiled tube assembly 300a, so that the connection between the coiled tube assembly 300a and the cover plate 200 is more stable and secure. Of course, in other embodiments, the connection portion 341 may not be installed in the third limiting groove 322.

It should be noted that in other embodiments, no partition may be provided between two adjacent annular tube sections in order to form a flue gas channel between two adjacent annular tube sections, so that high-temperature flue gas generated by the combustion of fuel in the combustion chamber G can be discharged and flows into the smoke exhaust duct 120. For example, referring to fig. 8, the annular tube segment has two opposite side surfaces axially arranged along the spiral coil 310, wherein at least one of the side surfaces is convexly provided with a limit protrusion 325. In this embodiment, a second flue gas channel is formed between two axially adjacent annular pipe sections of the spiral coil 310 by the positioning of the limiting protrusion 325.

To facilitate forming the stop protrusion 325 on the helical coil 310, both of the sides of the annular tube segment may be planar. The plurality of limiting protrusions 325 can be uniformly distributed along the length direction of the spiral coil 310, so that the distance between any two adjacent annular pipe sections of the spiral coil 310 is the same, that is, the width of the second flue gas channel formed between any two adjacent annular pipe sections of the spiral coil 310 is the same, so that high-temperature flue gas can uniformly pass through each second flue gas channel, the spiral coil 310 can be uniformly heated everywhere, and the heat exchange efficiency of the heat exchanger 600 is improved.

In this embodiment, by providing the limiting protrusion 325 on the spiral coil 310, the partition 320 can be avoided from being disposed between two adjacent annular pipe sections of the spiral coil 310, and an optimal distance can be formed between two adjacent annular pipe sections of the spiral coil 310, that is, an optimal distance can be formed between two adjacent annular pipe sections of the spiral coil 310, so as to allow the high-temperature flue gas to flow to the smoke exhaust duct 120.

In addition, in order to increase the contact area between the spiral coil 310 and the high-temperature flue gas and enhance the heat exchange effect, the windward side of the spiral coil 310 may be an arc surface.

The structure of the cap plate 200 will be described in detail below.

Referring to fig. 1, 2 and 3, a water inlet 220 and a water outlet 230 are disposed on the cover plate 200, a water inlet of the coil assembly 300a is communicated with the water inlet 220 of the cover plate 200, and a water outlet of the coil assembly 300a is communicated with the water outlet 230 of the cover plate 200. The water inlet of the coil assembly 300a may be directly communicated with the water inlet 220 of the cover plate 200, or may be communicated with the water inlet 220 of the cover plate 200 through a connecting pipe; similarly, the water outlet of the coil assembly 300a may be directly communicated with the water outlet 230 of the cover plate 200, or may be communicated with the water outlet 230 of the cover plate 200 through a connecting pipe, which is not particularly limited.

A first connecting pipe 240 is arranged at the water inlet 220 of the cover plate 200, and a second connecting pipe 250 is arranged at the water outlet 230 of the cover plate 200. In one embodiment, the first connection pipe 240 and the second connection pipe 250 are flexible pipes. It is worth mentioning that the flexible tube has some deformability, thus allowing the coil assembly 300a to be removed for cleaning without removing the connecting tube and without draining the heating system or the heat exchanger 600 of water. In particular, the flexible tube may be made of an elastic material, such as a rubber tube, or the like, but may also be made of other deformable materials, such as a metal bellows, and is not limited herein. In another embodiment, the first connection pipe 240 and the second connection pipe 250 may also be detachable rigid pipes.

Referring to fig. 9, in the above embodiments, the heat exchanger 600 further includes a sealing gasket 500, and the sealing gasket 500 is used to connect the housing 100 and the cover plate 200 in a sealing manner. Here, the sealing washer 500 is provided to effectively improve the sealing performance of the combustion chamber G, thereby preventing high-temperature flue gas in the combustion chamber G from escaping from the connection gap between the cover plate 200 and the housing 100.

Referring to fig. 1, 2 and 3, in each of the above embodiments, the burner assembly 400 includes a cover 410 and a burner barrel 420 connected to the cover 410, the cover 410 is detachably connected to the cover plate 200, the burner barrel 420 extends into the casing 100 through the cover plate 200, and the coil assembly 300a is located at the periphery of the burner barrel 420.

There are various detachable connection manners of the cover 410 and the cover plate 200, such as a snap connection, a screw connection, a plug connection, and the like, which are not limited in particular. It should be noted that, in the present embodiment, the cover 410 and the cover plate 200 are fixedly connected by a fixing member 340. Specifically, referring to fig. 1 and 2, an external thread is disposed on a portion of the connecting portion 341, which is close to the cover plate 200 and penetrates through the cover plate 200, and a screw hole or a nut adapted to the external thread is disposed on the cover body 410. In this way, the burner assembly 400 is fixed to the cover plate 200 by the fixing member 340, and the coil assembly 300a is fixed to the cover plate 200, so that the disassembling and assembling processes of the heat exchanger 600 are further simplified, and the heat exchanger 600 is more easily and conveniently cleaned.

The present invention further provides a water heating apparatus, which includes a heat exchanger 600, and the specific structure of the heat exchanger 600 refers to the above embodiments, and since the water heating apparatus adopts all technical solutions of all the above embodiments, the water heating apparatus at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. The hot water device is mainly used for providing hot water, for example, the hot water device may be a water heater or a wall-hanging stove, but is not limited thereto.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, which are directly or indirectly applied to the present invention, are included in the scope of the present invention.

Claims

1. A heat exchanger, comprising:

the smoke exhaust device comprises a shell, a smoke exhaust pipe and a smoke exhaust pipe, wherein an opening and a smoke outlet are formed in the shell;

the heat exchange body is detachably arranged in the shell cover, and the heat exchange body can be taken out of the shell cover through the opening;

a coil assembly removable from within the enclosure through the opening;

the cover plate is arranged at the opening of the shell cover in a covering manner; and

the burner assembly and the cover plate are integrally formed, or the burner assembly and the cover plate are detachably connected;

the heat exchanger also comprises a fixing piece, and one end of the coil pipe assembly, which is far away from the opening, is detachably connected with the cover plate through the fixing piece;

the fixing piece comprises a connecting part and a limiting part connected with the connecting part, the connecting part is connected with the cover plate, and the limiting part is abutted against one end of the coil pipe assembly, which is far away from the opening, so that the coil pipe assembly is fixed on the cover plate;

the coil pipe subassembly includes spiral coil pipe and separator, spiral coil pipe includes along a plurality of ring-shaped pipe sections of its axial setting, the separator includes fixed part and a plurality of partition portion, the fixed part is followed spiral coil pipe's axial extension, and is a plurality of the partition portion is followed spiral coil pipe's axial interval set up in on the fixed part, the partition portion set up in between two ring-shaped pipe sections that spiral coil pipe axial is adjacent, deviating from of fixed part spiral coil pipe's the third spacing groove that is formed with on the surface, connecting portion install in the third spacing inslot.

2. The heat exchanger as claimed in claim 1, wherein the number of the connecting portions is two, two connecting portions are spaced apart from each other along the circumference of the coil assembly, and two ends of the limiting portion are connected to the two connecting portions, respectively.

3. The heat exchanger of claim 2, wherein the number of said fixtures is two, and two of said fixtures are arranged with central symmetry about a cross-sectional diameter of said coil assembly.

4. The heat exchanger of claim 3, further comprising a heat insulation plate and a fixing rod, wherein the heat insulation plate is mounted at an end of the coil assembly away from the opening, a first limiting groove is formed on a limiting portion of one of the two fixing members, a second limiting groove is formed on a limiting portion of the other fixing member, and the fixing rod passes through the first limiting groove and the second limiting groove to fix the heat insulation plate at the end of the coil assembly away from the opening.

5. The heat exchanger as claimed in claim 4, wherein the number of the first and second retaining grooves is plural, the number of the fixing rods is plural, one end of each of the fixing rods is inserted into a corresponding one of the first retaining grooves, and the other end of each of the fixing rods is inserted into a corresponding one of the second retaining grooves.

6. The heat exchanger as claimed in claim 5, wherein the number of the first limiting groove, the second limiting groove and the fixing bars is two, and one ends of the two fixing bars are connected to each other to have a U-shaped configuration.

7. The heat exchanger of claim 1, wherein said coil assembly is removably connected to said cover plate proximate said open end; or

The heat exchanger further comprises a fixing piece, the coil assembly is close to the open end and detachably connected with the cover plate, and the coil assembly deviates from the open end and is detachably connected with the cover plate through the fixing piece.

8. The heat exchanger of any one of claims 2 to 7, wherein the coil assembly includes a spiral coil including a plurality of annular tube segments arranged in an axial direction thereof, and a partitioning member including a fixing portion extending in the axial direction of the spiral coil and a plurality of partition portions arranged on the fixing portion at intervals in the axial direction of the spiral coil, the partition portions being arranged between two adjacent annular tube segments in the axial direction of the spiral coil.

9. The heat exchanger of any one of claims 2 to 7, wherein the coil assembly comprises at least one helical coil comprising a plurality of annular segments disposed axially therealong, the annular segments having two sides disposed axially opposite each other along the helical coil, at least one of the sides having a stop projection projecting therefrom.

10. The heat exchanger of any one of claims 2 to 7, wherein the coil assembly comprises at least one helical coil, the face of the helical coil facing into the wind being cambered.

11. The heat exchanger of any one of claims 2 to 7, wherein the cover plate is provided with a water inlet and a water outlet, the water inlet of the coil assembly is communicated with the water inlet of the cover plate, and the water outlet of the coil assembly is communicated with the water outlet of the cover plate.

12. The heat exchanger as claimed in claim 11, wherein a first connection pipe is provided at the water inlet of the cover plate, a second connection pipe is provided at the water outlet of the cover plate, and the first connection pipe and the second connection pipe are flexible pipes or detachable rigid pipes.

13. The heat exchanger according to any one of claims 2 to 7, wherein one of the cover plate and the housing cover is provided with a first engaging portion, and the other is provided with a second engaging portion engaging with the first engaging portion, the first engaging portion is a hook, and the second engaging portion is a buckle.

14. The heat exchanger of any one of claims 1 to 7, wherein the burner assembly comprises a cover and a combustion bowl attached to the cover, the cover being removably attached to the cover, the combustion bowl extending through the cover into the housing, the coil assembly being located around the periphery of the combustion bowl.

15. A hot water appliance comprising a heat exchanger as claimed in any one of claims 1 to 14.