CN212566310U - Heat exchange structure and gas water heater - Google Patents

Abstract

The utility model discloses a heat exchange structure and gas heater, heat exchange structure include casing and heat transfer unit, be equipped with the runner in the casing, heat transfer unit is at least two, heat transfer unit with the connection can be dismantled to the casing, and is adjacent heat transfer unit sets up side by side, heat transfer unit is located in the runner and be used for the heat transfer. Above-mentioned heat exchange structure, heat transfer unit are used for the heat transfer in the runner, can pass through the runner with high-temperature gas and realize the heat transfer with heat transfer unit contact, if heat transfer unit in use appears damaging the circumstances that etc. need the maintenance, can pull down corresponding heat transfer unit and adorn new heat transfer unit again, need not change all heat transfer units simultaneously, have reduced the maintenance degree of difficulty and cost of maintenance, have made things convenient for maintenance work.

Description

Heat exchange structure and gas water heater

Technical Field

The utility model relates to a domestic appliance equipment technical field especially relates to a heat exchange structure and gas heater.

Background

The heat exchanger with the fin group is generally used for transferring heat on a gas water heater, the heat transfer efficiency is closely related to the structure and the interval of the fin group, when the interval between every two adjacent fin groups in the fin group is controlled within a certain range, the stability of the heat exchange efficiency of the heat exchanger can be ensured, but the long-term high-temperature smoke can corrode the fins, the fins are burnt, and the like, so that the interval between every two adjacent heat exchange fins is changed, and the heat exchange efficiency of the heat exchanger is unstable. The traditional fin assembly can only be replaced in a whole process of maintenance, the replacement step is troublesome, and the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model discloses lie in overcoming the not enough of current fin subassembly maintenance trouble, provide a heat exchange structure and gas heater of convenient maintenance.

The technical scheme is as follows:

a heat exchange structure comprising:

the device comprises a shell, a flow passage and a flow guide plate, wherein the flow passage is arranged in the shell; and

the heat exchange units are at least two, the heat exchange units are detachably connected with the shell, the heat exchange units are arranged side by side, and the heat exchange units are located in the flow channels and used for heat exchange.

Above-mentioned heat exchange structure, heat transfer unit are used for the heat transfer in the runner, can pass through the runner with high-temperature gas and realize the heat transfer with heat transfer unit contact, if heat transfer unit in use appears damaging the circumstances that etc. need the maintenance, can pull down corresponding heat transfer unit and adorn new heat transfer unit again, need not change all heat transfer units simultaneously, have reduced the maintenance degree of difficulty and cost of maintenance, have made things convenient for maintenance work.

In one embodiment, the flow channels are arranged along the longitudinal direction, and the heat exchange units are arranged in sequence along the transverse direction.

In one embodiment, a socket communicated with the flow passage is arranged on the shell, the socket is arranged corresponding to the heat exchange unit, and the end part of the heat exchange unit is used for being inserted into the socket.

In one embodiment, the heat exchange unit comprises fins and heat exchange tubes, the fins are penetrated through the heat exchange tubes, the end parts of the heat exchange tubes extend out of the flow channel through the insertion openings, and the different heat exchange tubes are communicated in sequence.

In one embodiment, the heat exchange structure further includes a coil, the flow channel includes a combustion area and a heat exchange area sequentially disposed along a longitudinal direction, the heat exchange unit is disposed in the heat exchange area, different heat exchange tubes are sequentially communicated to form a heat exchange pipeline, the heat exchange pipeline includes an inlet end and an outlet end, the coil is communicated with the inlet end or the outlet end, and the coil is wound outside the housing and disposed corresponding to the combustion area.

In one embodiment, the coil is spirally wound outside the housing.

In one embodiment, the heat exchange tube is a U-shaped tube; or the heat exchange tube is a W-shaped tube; or the heat exchange tube is an S-shaped tube; or the heat exchange tube is a straight tube.

In one embodiment, the heat exchange structure further comprises a connecting pipe and a sealing ring, the connecting pipe is used for communicating different heat exchange pipes, the sealing ring is sleeved outside the connecting pipe or the heat exchange pipes, and the sealing ring is arranged between the connecting pipe and the heat exchange pipes.

In one embodiment, the heat exchange structure further includes a sleeve and an open pipe clamp, the sleeve is sleeved outside the heat exchange pipe, a first flange is arranged at a first end of the sleeve, an installation groove for installing the sealing ring is arranged at a second end of the sleeve, the connecting pipe is sleeved outside the second end of the sleeve, a second flange contacting with the first flange is arranged at an end of the connecting pipe, a sliding groove matched with the first flange and the second flange is arranged on a side wall of the open pipe clamp, and the open pipe clamp is used for clamping the connecting pipe.

In one embodiment, the heat exchange unit further includes a frame, the fins are disposed in the frame, the heat exchange tube penetrates through the frame and the fins, and the frame is disposed in the flow channel.

In one embodiment, the frame body comprises a front end plate, a rear end plate and four frame pieces, the two ends of each frame piece are respectively connected with the front end plate and the rear end plate, notches matched with the corners of the fins are formed in the four frame pieces, and the heat exchange tubes penetrate through the front end plate and the rear end plate.

A gas water heater comprises a burner and the heat exchange structure, wherein the burner is arranged in a flow channel.

Above-mentioned gas heater, accessible combustor ignition and burning form high temperature flue gas, and high temperature flue gas exchanges with heat transfer unit when flowing in the runner, if heat transfer unit in use appears damaging the condition that etc. need the maintenance, can pull down corresponding heat transfer unit and adorn new heat transfer unit again, need not change all heat transfer units simultaneously, has reduced the maintenance degree of difficulty and cost of maintenance, has made things convenient for maintenance work.

In one embodiment, the burner comprises at least two fire rows, the fire rows are arranged corresponding to the heat exchange units, the fire rows are arranged below the heat exchange units, and the fire rows and the heat exchange units are arranged along the same direction.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

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

Fig. 1 is an assembly view of a heat exchange structure according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a heat exchange structure according to an embodiment of the present invention;

fig. 3 is an exploded view of a heat exchange structure according to an embodiment of the present invention;

fig. 4 is an exploded schematic view of a heat exchange unit according to an embodiment of the present invention;

fig. 5 is an exploded view of a connection tube, a sleeve, a seal ring, and an open tube clamp according to an embodiment of the present invention;

fig. 6 is an assembly view of fig. 5.

Description of reference numerals:

100. the heat exchanger comprises a shell, 101, a flow channel, 102, a socket, 103, a combustion area, 200, a heat exchange unit, 210, fins, 220, a heat exchange pipe, 230, a frame body, 231, a front end plate, 232, a rear end plate, 233, a frame piece, 233a, a notch, 300, a coil pipe, 410, a connecting pipe, 411, a second flange, 420, a sealing ring, 430, a sleeve pipe, 431, a first flange, 440 and an opening pipe clamp.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in fig. 1 to 3, an embodiment discloses a heat exchange structure, which includes a casing 100 and at least two heat exchange units 200, wherein a flow channel 101 is disposed in the casing 100, the heat exchange units 200 are detachably connected to the casing 100, the heat exchange units 200 are disposed side by side, and the heat exchange units 200 are located in the flow channel 101 and used for heat exchange.

Above-mentioned heat exchange structure, heat transfer unit 200 is used for the heat transfer in runner 101, can pass through runner 101 with high-temperature gas and realize the heat transfer with heat transfer unit 200 contact, if heat transfer unit 200 in use appears damaging the circumstances that etc. need be maintained, can pull down corresponding heat transfer unit 200 and install new heat transfer unit 200 again, need not change all heat transfer units 200 simultaneously, has reduced the maintenance degree of difficulty and cost of maintenance, has made things convenient for maintenance work.

Alternatively, the heat exchange unit 200 is located in the flow channel 101, which means that the heat exchange unit 200 is located in the flow channel 101 as a whole; or a portion of heat exchange unit 200 is located within flow channel 101.

In one embodiment, as shown in fig. 1 to 3, the flow channels 101 are arranged along the longitudinal direction, and the heat exchange units 200 are arranged along the transverse direction. High-temperature gas moves along the extending direction of the flow channel 101 in the flow channel 101, when the heat exchange units 200 are transversely and sequentially arranged relative to the flow channel 101, the high-temperature gas can be respectively contacted with different heat exchange units 200, the heat exchange efficiency is higher, and even if part of the heat exchange units 200 are more damaged in the use process, the damage degree of each heat exchange unit 200 is still more average with respect to all the heat exchange units 200, the time point of replacing the heat exchange units 200 can be prolonged, and the maintenance frequency is reduced.

Alternatively, the "transverse direction" and the "longitudinal direction" do not refer to an absolute "horizontal direction" and an absolute "vertical direction", but refer to two directions perpendicular or approximately perpendicular to each other, so as to illustrate that the extending direction of the flow channel 101 is perpendicular or approximately perpendicular to the arrangement direction of the different heat exchange units 200.

In other embodiments, the heat exchange units 200 may be arranged in sequence along the transverse direction. At this time, according to the morning and evening of the contact between the heat exchange unit 200 and the high-temperature gas, the probability and the damage degree of the heat exchange unit 200 are different, and the heat exchange unit 200 can be overhauled according to the rule.

In one embodiment, as shown in fig. 3, a socket 102 communicating with the flow channel 101 is provided on the housing 100, the socket 102 is provided corresponding to the heat exchange unit 200, and an end of the heat exchange unit 200 is used for being inserted into the socket 102. Heat exchange unit 200 can be installed and positioned by inserting heat exchange unit 200 into corresponding socket 102, and at the same time, only heat exchange unit 200 needs to be pulled out of socket 102 during disassembly, so that the disassembly and assembly operations are simple.

Optionally, the shell 100 is provided with two opposite side surfaces respectively with the socket 102, so as to facilitate the installation and fixation of the heat exchange unit 200.

In this embodiment, both ends of the casing 100 have openings communicated with the flow channel 101 for inputting air and exhausting flue gas, respectively, and the socket 102 on the casing 100 is located on the side surface of the casing 100 and extends to the upper end surface of the casing 100, so that the heat exchange unit 200 can be detached from the casing 100 by pulling upwards. In other embodiments, the receptacle 102 of the housing 100 may be closed, which requires the heat exchange unit 200 to be removed by being inserted and pulled in the transverse direction.

In this embodiment, one socket 102 is inserted into one heat exchange unit 200, so as to form a row of heat exchange units 200 arranged in the transverse direction, and at this time, the heat exchange unit 200 is directly pulled out when the heat exchange unit 200 needs to be replaced, so that the replacement of the heat exchange unit 200 is simpler. In other embodiments, at least two heat exchange units 200 may be disposed in one socket 102, and different heat exchange units 200 may be disposed in sequence in the longitudinal direction or in sequence in the transverse direction in one socket 102.

In addition, in other embodiments, the detachable connection of the heat exchange unit 200 and the housing 100 may also be:

a through hole communicated with the flow channel 101 is formed in the shell 100, a threaded hole is formed in the heat exchange unit 200, and the shell 100 and the heat exchange unit 200 are detachably connected by penetrating the through hole through a screw and being in threaded fit with the threaded hole in the heat exchange unit 200;

or a sliding chute extending to the end face of the shell 100 is arranged on the inner wall of the flow channel 101, a sliding buckle matched with the sliding chute is arranged on the heat exchange unit 200, and the heat exchange unit 200 is detachably connected with the shell 100 by sliding the sliding buckle into the sliding chute;

or be equipped with the buckle with heat exchange unit 200 joint in the runner 101, for example the buckle is the bellied shell fragment in middle part, be equipped with the pit that matches with the shell fragment middle part on the heat exchange unit 200, when packing heat exchange unit 200 into runner 101 in, heat exchange unit 200 can extrude the buckle, makes the middle part of buckle and the pit on the heat exchange unit 200 match, makes heat exchange unit 200 spacing, when pulling out heat exchange unit 200, the buckle atress breaks away from the pit, can tear heat exchange unit 200 out.

In one embodiment, as shown in fig. 2 and 4, the heat exchange unit 200 includes a fin 210 and a heat exchange tube 220, the heat exchange tube 220 penetrates through the fin 210, an end of the heat exchange tube 220 extends out of the flow channel 101 from the socket 102, and different heat exchange tubes 220 are sequentially communicated. Through the intercommunication in proper order of different heat exchange tubes 220, make each heat exchange unit 200 spacing each other, keep heat exchange unit 200 stable, prevent that heat exchange unit 200 from taking place the condition such as shake, simultaneously because the tip of heat exchange tube 220 stretches out runner 101, the connection between the different heat exchange tubes 220 all operates outside casing 100 with the separation, has reduced the operation degree of difficulty.

Optionally, an arc-shaped structure matched with the heat exchange tube 220 is arranged on the inner wall of the lower side of the socket 102, the heat exchange tube 220 can be erected on the arc-shaped structure at the moment to achieve installation of the heat exchange tube 220, the limiting effect on the heat exchange unit 200 is better, and meanwhile, the arc-shaped structure is matched with the heat exchange tube 220, so that structural damage to the heat exchange tube 220 is not easily caused.

Alternatively, as shown in fig. 4, one heat exchange unit 200 includes a plurality of fins 210, and the fins 210 are arranged at intervals. At this time, the high-temperature gas can pass through the gaps between the fins 210, and can better exchange heat with the fins 210. Specifically, the number of fins 210 may be 88 to 90. At this time, the distance between the fins 210 is good, which is beneficial to improving the heat exchange efficiency. In other embodiments, the number of fins 210 may be less than 88 or greater than 90.

Alternatively, the fins 210 may be circular in shape; or polygons such as square, rectangle, rhombus, trapezoid, etc.; or other irregular shapes.

In other embodiments, the heat exchange unit 200 may also be other heat exchange structures, such as a plate heat exchange structure.

In this embodiment, as shown in fig. 2, a heat exchange tube 220 is disposed in a heat exchange unit 200. In other embodiments, at least two heat exchange tubes 220 are disposed in one heat exchange unit 200, and the heat exchange tubes 220 in one heat exchange unit 200 may be sequentially disposed along the transverse direction, the longitudinal direction or other directions.

In one embodiment, as shown in fig. 1 to 3, the heat exchange structure further includes a coil 300, the flow channel 101 includes a combustion region 103 and a heat exchange region sequentially arranged along a longitudinal direction, the heat exchange unit 200 is disposed in the heat exchange region, different heat exchange tubes 220 are sequentially communicated to form a heat exchange tube 220, the heat exchange tube 220 includes an inlet end and an outlet end, the coil 300 is communicated with the inlet end or the outlet end, and the coil 300 is disposed around the housing 100 and corresponds to the combustion region 103. Produce high temperature flue gas at the mode of combustion zone 103 accessible burning, high temperature flue gas can flow to the heat transfer district and accomplish main heat transfer in the heat transfer district, and the in-process of generating high temperature flue gas and high temperature flue gas flow through combustion zone 103 in the combustion zone 103, can heat casing 100, casing 100 can distribute away the heat and cause calorific loss, consequently around locating casing 100 outside and corresponding combustion zone 103 setting through setting up coil pipe 300, can make coil pipe 300 absorb the heat on the casing 100 and be used for the heat exchange, improve holistic thermal efficiency, reduce calorific loss.

Alternatively, when the coil 300 is in communication with the inlet end, it may be used for preheating; when the coil 300 is in communication with the outlet end, it may be used to keep the temperature or further increase the temperature.

Optionally, the surface of the coil 300 close to the shell 100 is a plane, so that the coil can be better attached to the shell 100, and the heat exchange effect is improved;

or the shell 100 is provided with a groove matched with the coil pipe 300, so that the installation and the limiting of the coil pipe 300 can be facilitated, the contact area between the coil pipe 300 and the shell 100 can be increased, and the heat exchange effect is improved.

In one embodiment, as shown in fig. 3, the coil 300 is spirally wound around the housing 100. At this time, the coil 300 can be fully contacted with the part of the shell 100 where the gas area is located, and the heat exchange effect is further improved.

In the present embodiment, as shown in fig. 2, the heat exchange pipe 220 is a U-shaped pipe. When the heat exchange tube 220 is a U-shaped tube, the heat exchange tube 220 can penetrate through the fin 210 from the same side of the heat exchange unit 200 at the inlet and the outlet, so that different heat exchange tubes 220 can be conveniently connected or detached.

In other embodiments, the heat exchange tube 220 may also be a W-shaped tube, an S-shaped tube, a straight tube or other shaped tube.

In one embodiment, as shown in fig. 3 and 5, the heat exchange structure further includes a connection pipe 410 and a sealing ring 420, the connection pipe 410 is used for communicating different heat exchange pipes 220, the sealing ring 420 is sleeved outside the connection pipe 410 or outside the heat exchange pipe 220, and the sealing ring 420 is disposed between the connection pipe 410 and the heat exchange pipe 220. At this time, the joint of the connection pipe 410 and the heat exchange pipe 220 may be sealed by the sealing ring 420, thereby preventing water leakage.

Optionally, the flow directions of water in the heat exchange tubes 220 of two adjacent heat exchange units 200 are opposite, at this time, an outlet of one of the heat exchange tubes 220 is flush with an outlet of the adjacent one of the heat exchange tubes 220, and the connecting tube 410 is horizontally arranged;

or the flow direction of the water in the heat exchange tubes 220 of different heat exchange units 200 is the same, and the connection tube 410 is arranged obliquely and used for communicating the inlet of one heat exchange tube 220 with the outlet of the adjacent heat exchange tube 220.

In one embodiment, as shown in fig. 2, 5 and 6, the heat exchange structure further includes a sleeve 430 and an open pipe clamp 440, the sleeve 430 is sleeved outside the heat exchange tube 220, a first flange 431 is disposed at a first end of the sleeve 430, an installation groove for installing the sealing ring 420 is disposed at a second end of the sleeve 430, the connecting pipe 410 is sleeved outside a second end of the sleeve 430, a second flange 411 contacting the first flange 431 is disposed at an end of the connecting pipe 410, a sliding groove matching with the first flange 431 and the second flange 411 is disposed on a side wall of the open pipe clamp 440, and the open pipe clamp 440 is used for clamping the connecting pipe 410. The connecting pipe 410 can be clamped by the opening pipe clamp 440, the situation that water leakage and the like cannot occur between the connecting pipe 410 and the heat exchange pipe 220 under the action of water pressure is guaranteed, the opening chute of the opening pipe clamp 440 is matched with the pipe sleeve, the connecting pipe 410 can be clamped by the opening pipe clamp 440, and meanwhile the opening chute is clamped with the flanging of the pipe sleeve to limit the opening pipe clamp 440.

Specifically, the sleeve 430 is fixedly connected to the heat exchange tube 220, and is conveniently connected to the connection tube 410, and the sleeve 430 and the heat exchange tube 220 may be welded, screwed, and the like. In addition, the sleeve 430 and the heat exchange pipe 220 may be an integral structure.

In one embodiment, as shown in fig. 3 and 4, the heat exchange unit 200 further includes a frame 230, the fins 210 are disposed in the frame 230, the heat exchange tubes 220 penetrate through the frame 230 and the fins 210, and the frame 230 is disposed in the flow channel 101. The frame 230 can limit and protect the installation of the fins 210, so that the fins 210 can be arranged regularly, and the fins 210 of different heat exchange units 200 are prevented from being damaged due to collision and the like.

In one embodiment, as shown in fig. 3 and 4, the frame 230 includes a front end plate 231, a rear end plate 232 and four frame members 233, two ends of each of the frame members 233 are respectively connected to the front end plate 231 and the rear end plate 232, the frame members 233 are four, notches 233a matched with corners of the fins 210 are formed in the frame members 233, and the heat exchange tubes 220 penetrate through the front end plate 231 and the rear end plate 232. At this time, the four corners of the fin 210 are respectively clamped into the notches 233a of the corresponding frame members 233, the frame members 233 can better limit the fin 210, and meanwhile, gaps between the frame members 233 can be used for passing high-temperature flue gas, so that the heat exchange effect of the fin 210 and the heat exchange tube 220 is not affected.

In other embodiments, the frame 230 includes a left-side limiting member, a right-side limiting member and an auxiliary member, slots matched with the edges of the fins 210 are disposed on the left-side limiting member and the right-side limiting member, the left-side limiting member and the right-side limiting member are disposed on two sides of the fins 210, and the auxiliary member is used for connecting the left-side limiting member and the right-side limiting member, so that the effects of protecting the fins 210 and facilitating installation can be achieved.

An embodiment discloses a gas heater, including combustor and above-mentioned heat exchange structure, the combustor is located in runner 101.

Above-mentioned gas heater, accessible combustor ignition and burning form high temperature flue gas, and high temperature flue gas exchanges heat with heat transfer unit 200 when flowing in runner 101, if heat transfer unit 200 in use appears damaging the condition that etc. need maintain, can pull down corresponding heat transfer unit 200 and adorn new heat transfer unit 200 again, need not change all heat transfer units 200 simultaneously, has reduced the maintenance degree of difficulty and cost of maintenance, has made things convenient for maintenance work.

Optionally, in the flow channel 101, the burner is disposed below the heat exchange unit 200, and a highest point of flame during combustion of the burner is close to the heat exchange unit 200, so that the heat exchange unit 200 can be better heated, and the heat exchange efficiency is improved.

In one embodiment, the burner includes at least two fire rows, the fire rows are disposed corresponding to the heat exchange unit 200, the fire rows are disposed below the heat exchange unit 200, and the fire rows and the heat exchange unit 200 are disposed along the same direction. Because the adjustment of combustor along with the firepower size, can corresponding adjustment fire arrange the quantity of opening, for example only open single fire row when needing the firepower less, then open other fire row when needing to increase the firepower, consequently must have the opening number of times of fire row higher when using, through arranging heat transfer unit 200 and fire row one-to-one and along same direction setting, make a fire row mainly heat a heat transfer unit 200, then the number of times that some heat transfer unit 200 are heated is more, the damage appears more, but along with gas heater's use this moment, the damage that heat transfer unit 200 appears in same period more concentrates on a certain or several heat transfer unit 200, can solve through changing heat transfer unit 200, gas heater's maintenance and heat transfer unit 200's change have been made things convenient for.

Specifically, compare when arranging and heat transfer unit 200 mutually perpendicular in the fire, a fire is arranged and is heated a plurality of heat transfer unit 200 simultaneously, then all can appear damaging on a plurality of fire rows, if all appear damaging on a plurality of fire rows, then all fire rows need be changed simultaneously, but a fire row can only heat the subregion on the heat transfer unit 200, can cause heat transfer unit 200's waste, consequently fire row and heat transfer unit 200 set up along same direction can conveniently overhaul, and cost of maintenance is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (13)

1. A heat exchange structure, comprising:

the device comprises a shell, a flow passage and a flow guide plate, wherein the flow passage is arranged in the shell; and

the heat exchange units are at least two, the heat exchange units are detachably connected with the shell, the heat exchange units are arranged side by side, and the heat exchange units are located in the flow channels and used for heat exchange.

2. The heat exchange structure according to claim 1, wherein the flow passages are arranged in a longitudinal direction, and the heat exchange units are arranged in sequence in a transverse direction.

3. The heat exchange structure according to claim 1, wherein the housing is provided with a socket communicating with the flow passage, the socket is provided corresponding to the heat exchange unit, and an end of the heat exchange unit is inserted into the socket.

4. The heat exchange structure according to claim 3, wherein the heat exchange unit comprises a fin and a heat exchange tube, the heat exchange tube penetrates through the fin, the end part of the heat exchange tube extends out of the flow channel from the socket, and different heat exchange tubes are communicated in sequence.

5. The heat exchange structure according to claim 4, further comprising a coil, wherein the flow channel comprises a combustion zone and a heat exchange zone sequentially arranged along a longitudinal direction, the heat exchange unit is disposed in the heat exchange zone, different heat exchange tubes are sequentially communicated to form a heat exchange pipeline, the heat exchange pipeline comprises an inlet end and an outlet end, the coil is communicated with the inlet end or the outlet end, and the coil is wound outside the housing and is disposed corresponding to the combustion zone.

6. The heat exchange structure of claim 5, wherein the coil is helically wound around the housing.

7. The heat exchange structure according to claim 4, wherein the heat exchange tube is a U-shaped tube; or the heat exchange tube is a W-shaped tube; or the heat exchange tube is an S-shaped tube; or the heat exchange tube is a straight tube.

8. The heat exchange structure according to any one of claims 4 to 7, further comprising a connecting pipe and a sealing ring, wherein the connecting pipe is used for communicating different heat exchange pipes, the sealing ring is sleeved outside the connecting pipe or the heat exchange pipes, and the sealing ring is arranged between the connecting pipe and the heat exchange pipes.

9. The heat exchange structure according to claim 8, further comprising a sleeve and an open pipe clamp, wherein the sleeve is sleeved outside the heat exchange pipe, a first flange is arranged at a first end of the sleeve, a mounting groove for mounting the sealing ring is arranged at a second end of the sleeve, the connecting pipe is sleeved outside the second end of the sleeve, a second flange in contact with the first flange is arranged at an end of the connecting pipe, a sliding groove matched with the first flange and the second flange is arranged on a side wall of the open pipe clamp, and the open pipe clamp is used for clamping the connecting pipe.

10. The heat exchange structure according to any one of claims 4 to 7, wherein the heat exchange unit further comprises a frame, the fins are arranged in the frame, the heat exchange tubes penetrate through the frame and the fins, and the frame is arranged in the flow channels.

11. The heat exchange structure according to claim 10, wherein the frame body comprises a front end plate, a rear end plate and four frame members, two ends of each frame member are respectively connected with the front end plate and the rear end plate, notches matched with the corners of the fins are arranged on the frame members, and the heat exchange tubes penetrate through the front end plate and the rear end plate.

12. A gas water heater comprising a burner and a heat exchange structure as claimed in any one of claims 1 to 11, said burner being located within said flow passage.

13. The gas water heater of claim 12, wherein the burner includes at least two fire banks, the fire banks are disposed corresponding to the heat exchange units, the fire banks are disposed below the heat exchange units, and the fire banks and the heat exchange units are disposed in the same direction.

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