Heat exchange structure and gas water heater

Abstract

The present invention discloses a heat exchange structure and a gas water heater. The heat exchange structure includes a shell and a heat exchange unit. A flow channel is provided in the shell. There are at least two heat exchange units. The heat exchange units are detachably connected to the shell. The heat exchange units are arranged side by side. The heat exchange units are located in the flow channel and are used for heat exchange. In the above heat exchange structure, the heat exchange unit is used for heat exchange in the flow channel. High-temperature gas can pass through the flow channel and contact with the heat exchange unit to achieve heat exchange. If the heat exchange unit is damaged during use and needs to be repaired, the corresponding heat exchange unit can be removed and a new heat exchange unit can be reinstalled. At the same time, there is no need to replace all the heat exchange units, which reduces the difficulty and cost of maintenance and facilitates maintenance work.

Description

Technical Field

[0001] The present invention relates to the technical field of household electrical appliances, and in particular to a heat exchange structure and a gas water heater. Background Art

[0002] Finned heat exchangers are commonly used in gas water heaters to transfer heat, and the heat transfer efficiency is closely related to the structure and spacing of the finned assembly. When the spacing between each adjacent fin assembly is controlled within a certain range, the heat exchange efficiency of the heat exchanger can be guaranteed to be stable. However, long-term high-temperature flue gas will cause corrosion and burning of the fins, resulting in changes in the spacing between each adjacent heat exchange fins, and the heat exchange efficiency of the heat exchanger will be unstable. The traditional fin assembly can only be replaced as a whole during maintenance, which is cumbersome and has high maintenance costs. Summary of the invention

[0003] Based on this, the present invention aims to overcome the defect that the existing fin assembly is difficult to maintain and provide a heat exchange structure and a gas water heater that are easy to maintain.

[0004] The technical solution is as follows:

[0005] A heat exchange structure, comprising:

[0006] a housing, wherein a flow channel is provided in the housing; and

[0007] The heat exchange unit includes at least two heat exchange units, the heat exchange units are detachably connected to the shell, the heat exchange units are arranged side by side, and the heat exchange units are located in the flow channel and are used for heat exchange.

[0008] In the above-mentioned heat exchange structure, the heat exchange unit is used for heat exchange in the flow channel. High-temperature gas can be passed through the flow channel and contact with the heat exchange unit to achieve heat exchange. If the heat exchange unit is damaged during use and needs maintenance, the corresponding heat exchange unit can be removed and a new heat exchange unit can be reinstalled. At the same time, there is no need to replace all the heat exchange units, which reduces the difficulty and cost of maintenance and facilitates maintenance work.

[0009] In one embodiment, the flow channel is arranged in the longitudinal direction, and the heat exchange units are arranged in sequence in the transverse direction.

[0010] In one of the embodiments, a socket connected to the flow channel is provided on the shell, the socket is arranged corresponding to the heat exchange unit, and the end of the heat exchange unit is used to be inserted into the socket.

[0011] In one embodiment, the heat exchange unit includes fins and heat exchange tubes, the heat exchange tubes are passed through the fins, the ends of the heat exchange tubes extend out of the flow channel from the sockets, and different heat exchange tubes are connected in sequence.

[0012] In one of the embodiments, the heat exchange structure further includes a coil, the flow channel includes a combustion zone and a heat exchange zone arranged in sequence along the longitudinal direction, the heat exchange unit is arranged in the heat exchange zone, the different heat exchange tubes are connected in sequence to form a heat exchange pipeline, the heat exchange pipeline includes an inlet end and an outlet end, the coil is connected to the inlet end or the outlet end, the coil is wound around the outside of the shell and arranged corresponding to the combustion zone.

[0013] In one embodiment, the coil is spirally wound outside the shell.

[0014] 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.

[0015] In one embodiment, the heat exchange structure further includes a connecting pipe and a sealing ring, wherein the connecting pipe is used to connect different heat exchange pipes, the sealing ring is sleeved outside the connecting pipe or outside the heat exchange pipe, and the sealing ring is arranged between the connecting pipe and the heat exchange pipe.

[0016] In one embodiment, the heat exchange structure further includes a sleeve and an open tube clamp, wherein the sleeve is sleeved outside the heat exchange tube, a first flange is provided at the first end of the sleeve, and a mounting groove for mounting the sealing ring is provided at the second end of the sleeve, and a second flange in contact with the first flange is provided at the end of the connecting tube, and a sliding groove matching the first flange and the second flange is provided on the side wall of the open tube clamp, and the open tube clamp is used to clamp the connecting tube.

[0017] In one of the embodiments, the heat exchange unit further includes a frame, the fins are arranged in the frame, the heat exchange tubes pass through the frame and the fins, and the frame is arranged in the flow channel.

[0018] In one embodiment, the frame includes a front end plate, a rear end plate and a frame member, the two ends of the frame member are respectively connected to the front end plate and the rear end plate, there are four frame members, and the frame members are provided with recesses matching the corners of the fins, and the heat exchange tubes pass through the front end plate and the rear end plate.

[0019] A gas water heater comprises a burner and a heat exchange structure as described in any one of the above items, wherein the burner is arranged in the flow channel.

[0020] The above-mentioned gas water heater can be ignited and burned by the burner to form high-temperature flue gas. The high-temperature flue gas exchanges heat with the heat exchange unit when flowing in the flow channel. If the heat exchange unit is damaged during use and needs maintenance, the corresponding heat exchange unit can be removed and a new heat exchange unit can be reinstalled. At the same time, there is no need to replace all the heat exchange units, which reduces the difficulty and cost of maintenance and facilitates maintenance work.

[0021] In one of the embodiments, the burner includes at least two fire bars, the fire bars are arranged corresponding to the heat exchange unit, the fire bars are arranged below the heat exchange unit, and the fire bars and the heat exchange unit are arranged in the same direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the assembly of the heat exchange structure according to an embodiment of the present invention;

[0025] Figure 2 A cross-sectional view of a heat exchange structure according to an embodiment of the present invention;

[0026] Figure 3 An exploded schematic diagram of a heat exchange structure according to an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of an explosion of a heat exchange unit according to an embodiment of the present invention;

[0028] Figure 5 It is an exploded schematic diagram of the connecting pipe, sleeve, sealing ring and open pipe clamp according to an embodiment of the present invention;

[0029] Figure 6 for Figure 5 Assembly diagram of .

[0030] Description of reference numerals:

[0031] 100, shell, 101, flow channel, 102, socket, 103, combustion zone, 200, heat exchange unit, 210, fin, 220, heat exchange tube, 230, frame, 231, front end plate, 232, rear end plate, 233, frame member, 233a, notch, 300, coil, 410, connecting pipe, 411, second flange, 420, sealing ring, 430, sleeve, 431, first flange, 440, open pipe clamp. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0033] like Figures 1 to 3 As shown, an embodiment discloses a heat exchange structure, including a shell 100 and a heat exchange unit 200, wherein a flow channel 101 is provided in the shell 100, and there are at least two heat exchange units 200, wherein the heat exchange units 200 are detachably connected to the shell 100, and the heat exchange units 200 are arranged side by side, and the heat exchange units 200 are located in the flow channel 101 and are used for heat exchange.

[0034] In the above-mentioned heat exchange structure, the heat exchange unit 200 is used for heat exchange in the flow channel 101. High-temperature gas can pass through the flow channel 101 and contact with the heat exchange unit 200 to achieve heat exchange. If the heat exchange unit 200 is damaged during use and needs maintenance, the corresponding heat exchange unit 200 can be removed and a new heat exchange unit 200 can be reinstalled. At the same time, there is no need to replace all the heat exchange units 200, which reduces the difficulty and cost of maintenance and facilitates maintenance work.

[0035] Optionally, the above “heat exchange unit 200 is located in the flow channel 101 ” may mean that the entire heat exchange unit 200 is located in the flow channel 101 ; or a portion of the heat exchange unit 200 is located in the flow channel 101 .

[0036] In one embodiment, if Figures 1 to 3As shown, the flow channel 101 is arranged in the longitudinal direction, and the heat exchange units 200 are arranged in sequence in the transverse direction. The high-temperature gas moves in the flow channel 101 along the extension direction of the flow channel 101. When the heat exchange units 200 are arranged in sequence in the transverse direction relative to the flow channel 101, the high-temperature gas can contact different heat exchange units 200 respectively, and the heat exchange efficiency is high. Even if some heat exchange units 200 are more damaged during use, for all the heat exchange units 200, the damage degree of each heat exchange unit 200 is still relatively even, which can extend the time point when the heat exchange unit 200 needs to be replaced and reduce the number of maintenance times.

[0037] Optionally, the above-mentioned "transverse" and "longitudinal" do not refer to the absolute "horizontal direction" and "vertical direction", but refer to two directions that are perpendicular or approximately perpendicular to each other, and are used to illustrate that the extension direction of the flow channel 101 is perpendicular or approximately perpendicular to the arrangement direction of different heat exchange units 200.

[0038] In other embodiments, the heat exchange units 200 may also be arranged in sequence in the transverse direction. In this case, the probability and degree of damage to the heat exchange units 200 may vary depending on when the heat exchange units 200 come into contact with the high-temperature gas, and the heat exchange units 200 may be inspected and repaired according to the rules.

[0039] In one embodiment, if Figure 3 As shown, the housing 100 is provided with a socket 102 connected to the flow channel 101, and the socket 102 is arranged corresponding to the heat exchange unit 200, and the end of the heat exchange unit 200 is used to insert the socket 102. The heat exchange unit 200 can be installed and positioned by inserting the heat exchange unit 200 into the corresponding socket 102. At the same time, when disassembling, it is only necessary to pull the heat exchange unit 200 out of the socket 102, and the installation and disassembly operations are relatively simple.

[0040] Optionally, sockets are provided on two opposite sides of the shell 100 to facilitate the installation and fixation of the heat exchange unit 200.

[0041] In this specific embodiment, both ends of the housing 100 have openings connected to the flow channel 101, which are used to input air and exhaust smoke respectively. The socket 102 on the housing 100 is located on the side of the housing 100 and extends to the upper end surface of the housing 100, and the heat exchange unit 200 can be detached from the housing 100 by pulling upward. In other embodiments, the socket 102 on the housing 100 can also be closed, in which case the heat exchange unit 200 needs to be removed by plugging and pulling in the horizontal direction.

[0042] In this specific embodiment, one socket 102 is plugged into one heat exchange unit 200 to form a row of heat exchange units 200 arranged in a transverse direction. When the heat exchange unit 200 needs to be replaced, the heat exchange unit 200 can be directly unplugged, making the replacement of the heat exchange unit 200 easier. In other embodiments, at least two heat exchange units 200 can be arranged in one socket 102, and different heat exchange units 200 can be arranged in sequence in the longitudinal direction or in the transverse direction in one socket 102.

[0043] In addition, in other embodiments, the detachable connection between the heat exchange unit 200 and the housing 100 may also be:

[0044] The shell 100 is provided with a through hole communicating with the flow channel 101, and the heat exchange unit 200 is provided with a threaded hole. The shell 100 and the heat exchange unit 200 are detachably connected by screws penetrating the through hole and threadedly mating with the threaded hole on the heat exchange unit 200;

[0045] Or a slide groove extending to the end surface of the shell 100 is provided on the inner wall of the flow channel 101, and a slide buckle matching the slide groove is provided on the heat exchange unit 200, and the heat exchange unit 200 and the shell 100 are detachably connected by sliding the slide buckle into the slide groove;

[0046] Or a buckle that is engaged with the heat exchange unit 200 is provided in the flow channel 101, for example, the buckle is a spring sheet with a protrusion in the middle, and the heat exchange unit 200 is provided with a pit that matches the middle of the spring sheet. When the heat exchange unit 200 is installed in the flow channel 101, the heat exchange unit 200 will squeeze the buckle so that the middle of the buckle matches the pit on the heat exchange unit 200, so that the heat exchange unit 200 is limited. When the heat exchange unit 200 is pulled out, the buckle is subjected to force and disengaged from the pit, so that the heat exchange unit 200 can be removed.

[0047] In one embodiment, if Figure 2 and Figure 4 As shown, the heat exchange unit 200 includes a fin 210 and a heat exchange tube 220. The heat exchange tube 220 passes through the fin 210. The 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 connected in sequence. Through the sequential connection of different heat exchange tubes 220, each heat exchange unit 200 can be mutually limited, the stability of the heat exchange unit 200 is maintained, and the heat exchange unit 200 is prevented from shaking. At the same time, since the end of the heat exchange tube 220 extends out of the flow channel 101, the connection and detachment between different heat exchange tubes 220 are all operated outside the shell 100, which reduces the difficulty of operation.

[0048] Optionally, an arc structure matching the heat exchange tube 220 is provided on the inner wall on the lower side of the socket 102. In this case, the heat exchange tube 220 can be installed by laying the heat exchange tube 220 on the arc structure, which has a better limiting effect on the heat exchange unit 200. At the same time, the arc structure matches the heat exchange tube 220 and is not easy to cause structural damage to the heat exchange tube 220.

[0049] Alternatively, if Figure 4 As shown, a 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 can be 88 to 90. At this time, the spacing between the fins 210 is good, which is conducive to improving the heat exchange efficiency. In other embodiments, the number of fins 210 can also be less than 88 or greater than 90.

[0050] Optionally, the shape of the fin 210 may be circular; or a polygon such as a square, rectangle, diamond, trapezoid, or other irregular shapes.

[0051] In other embodiments, the heat exchange unit 200 may also be other heat exchange structures, such as a plate heat exchange structure.

[0052] In this specific embodiment, Figure 2 As shown, a heat exchange tube 220 is provided in one heat exchange unit 200. In other embodiments, at least two heat exchange tubes 220 are provided in one heat exchange unit 200, and the heat exchange tubes 220 in one heat exchange unit 200 can be sequentially arranged in the transverse direction, longitudinal direction or other directions.

[0053] In one embodiment, if Figures 1 to 3 As shown, the above-mentioned heat exchange structure also includes a coil 300, the flow channel 101 includes a combustion zone 103 and a heat exchange zone arranged in sequence along the longitudinal direction, the heat exchange unit 200 is arranged in the heat exchange zone, and the different heat exchange tubes 220 are connected in sequence to form a heat exchange tube 220 line, and the heat exchange tube 220 line includes an inlet end and an outlet end, the coil 300 is connected to the inlet end or the outlet end, and the coil 300 is wound outside the shell 100 and is arranged corresponding to the combustion zone 103. In the combustion zone 103, high-temperature flue gas can be generated by combustion, and the high-temperature flue gas can flow to the heat exchange zone and complete the main heat exchange in the heat exchange zone. In the process of generating high-temperature flue gas in the combustion zone 103 and the high-temperature flue gas flowing through the combustion zone 103, the shell 100 will be heated, and the shell 100 will dissipate heat to cause heat loss. Therefore, by arranging the coil 300 around the outside of the shell 100 and corresponding to the combustion zone 103, the coil 300 can absorb the heat on the shell 100 for heat exchange, thereby improving the overall thermal efficiency and reducing heat loss.

[0054] Optionally, when the coil 300 is connected to the inlet end, it can be used for preheating; when the coil 300 is connected to the outlet end, it can be used for heat preservation or further increasing the temperature.

[0055] Optionally, the surface of the coil 300 close to the shell 100 is a plane, which can better fit with the shell 100 and improve the heat exchange effect;

[0056] Alternatively, the shell 100 is provided with a groove matching the coil 300 , which can facilitate the installation and positioning of the coil 300 , and can also increase the contact area between the coil 300 and the shell 100 , thereby improving the heat exchange effect.

[0057] In one embodiment, if Figure 3 As shown, the coil 300 is spirally wound outside the shell 100. At this time, the coil 300 can fully contact the part of the shell 100 where the gas zone is located, further improving the heat exchange effect.

[0058] In this embodiment, if Figure 2 As shown, the heat exchange tube 220 is a U-shaped tube. When the heat exchange tube 220 is a U-shaped tube, when the heat exchange tube 220 is passed through the fin 210, its inlet and outlet can pass through the same side of the heat exchange unit 200, which can facilitate the operation of connecting or disconnecting different heat exchange tubes 220.

[0059] In other embodiments, the heat exchange tube 220 may also be a W-shaped tube, an S-shaped tube, a straight tube, or a tube of other shapes.

[0060] In one embodiment, if Figure 3 and Figure 5 As shown, the heat exchange structure further includes a connecting pipe 410 and a sealing ring 420. The connecting pipe 410 is used to connect different heat exchange pipes 220. The sealing ring 420 is sleeved outside the connecting pipe 410 or outside the heat exchange pipe 220, and the sealing ring 420 is arranged between the connecting pipe 410 and the heat exchange pipe 220. At this time, the joint between the connecting pipe 410 and the heat exchange pipe 220 can be sealed by the sealing ring 420 to prevent water leakage and the like.

[0061] Optionally, the water flows in the heat exchange tubes 220 of two adjacent heat exchange units 200 in opposite directions, and in this case, the outlet of one heat exchange tube 220 is arranged flush with the outlet of an adjacent heat exchange tube 220, and the connecting tube 410 is arranged horizontally;

[0062] Or the water flows in the heat exchange tubes 220 of different heat exchange units 200 in the same direction. In this case, the connecting tube 410 is tilted to connect the inlet of one heat exchange tube 220 with the outlet of an adjacent heat exchange tube 220 .

[0063] In one embodiment, if Figure 2, Figure 5 and Figure 6 As shown, the heat exchange structure further includes a sleeve 430 and an open tube clamp 440, the sleeve 430 is sleeved outside the heat exchange tube 220, the first end of the sleeve 430 is provided with a first flange 431, the second end of the sleeve 430 is provided with a mounting groove for mounting the sealing ring 420, the connecting tube 410 is sleeved outside the second end of the sleeve 430, the end of the connecting tube 410 is provided with a second flange 411 in contact with the first flange 431, the side wall of the open tube clamp 440 is provided with a slide groove matching the first flange 431 and the second flange 411, and the open tube clamp 440 is used to clamp the connecting tube 410. The open tube clamp 440 can be used to clamp the connecting tube 410 to ensure that there will be no water leakage between the connecting tube 410 and the heat exchange tube 220 under the action of water pressure. The slide groove of the open tube clamp 440 matches the tube sleeve, and the open tube clamp 440 can clamp the connecting tube 410. At the same time, the slide groove and the flange of the tube sleeve are clamped to achieve the limitation of the open tube clamp 440.

[0064] Specifically, the sleeve 430 is fixedly connected to the heat exchange tube 220, which is convenient for connection with the connecting tube 410. The sleeve 430 and the heat exchange tube 220 can be welded, fixed with screws, etc. In addition, the sleeve 430 and the heat exchange tube 220 can also be an integrated structure.

[0065] In one embodiment, if Figure 3 and Figure 4 As shown, the heat exchange unit 200 further includes a frame 230, the fins 210 are arranged in the frame 230, the heat exchange tubes 220 pass through the frame 230 and the fins 210, and the frame 230 is arranged 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 in a regular pattern, and prevent the fins 210 of different heat exchange units 200 from colliding and causing damage.

[0066] In one embodiment, if Figure 3 and Figure 4 As shown, the frame 230 includes a front end plate 231, a rear end plate 232 and a frame member 233, the two ends of the frame member 233 are respectively connected to the front end plate 231 and the rear end plate 232, there are four frame members 233, the frame members 233 are provided with notches 233a matching the corners of the fins 210, and the heat exchange tubes 220 are passed through the front end plate 231 and the rear end plate 232. At this time, the four corners of the fins 210 are respectively inserted into the notches 233a of the corresponding frame members 233, and the frame members 233 can better limit the fins 210, and the gaps between the frame members 233 can be used to pass high-temperature flue gas without affecting the heat exchange effect of the fins 210 and the heat exchange tubes 220.

[0067] In other embodiments, the frame 230 includes a left limiter, a right limiter and an auxiliary part. The left limiter and the right limiter are both provided with slots matching the edges of the fin 210, and the left limiter and the right limiter are respectively arranged on both sides of the fin 210. The auxiliary part is used to connect the left limiter and the right limiter, and can also protect the fin 210 and facilitate installation.

[0068] An embodiment discloses a gas water heater, including a burner and the heat exchange structure as described above, wherein the burner is disposed in the flow channel 101 .

[0069] The above-mentioned gas water heater can be ignited and burned by a burner to form high-temperature flue gas. The high-temperature flue gas exchanges heat with the heat exchange unit 200 when flowing in the flow channel 101. If the heat exchange unit 200 is damaged during use and needs maintenance, the corresponding heat exchange unit 200 can be removed and a new heat exchange unit 200 can be reinstalled. At the same time, there is no need to replace all the heat exchange units 200, which reduces the difficulty and cost of maintenance and facilitates maintenance work.

[0070] Optionally, in the flow channel 101, the burner is arranged below the heat exchange unit 200, and the highest point of the flame of the burner is close to the heat exchange unit 200 when burning, which can better heat the heat exchange unit 200 and improve the heat exchange efficiency.

[0071] In one embodiment, the burner includes at least two fire bars, which are arranged corresponding to the heat exchange unit 200, and the fire bars are arranged below the heat exchange unit 200, and the fire bars and the heat exchange unit 200 are arranged in the same direction. Since the burner adjusts the number of fire bars opened accordingly as the firepower is adjusted, for example, only a single fire bar is opened when the firepower is small, and other fire bars are opened when the firepower needs to be increased, so when in use, there must be a higher number of fire bars opened. By arranging the heat exchange unit 200 and the fire bars one by one and arranging them in the same direction, so that one fire bar mainly heats one heat exchange unit 200, some of the heat exchange units 200 are heated more times and are more prone to damage. However, at this time, with the use of the gas water heater, the damage of the heat exchange unit 200 in the same period is more concentrated on one or several heat exchange units 200, which can be solved by replacing the heat exchange unit 200, which facilitates the maintenance of the gas water heater and the replacement of the heat exchange unit 200.

[0072] Specifically, compared with when the fire bar and the heat exchange unit 200 are arranged perpendicular to each other, one fire bar heats multiple heat exchange units 200 at the same time, then multiple fire bars may be damaged. If multiple fire bars are damaged, all the fire bars need to be replaced at the same time, but one fire bar can only heat a partial area on the heat exchange unit 200, which will cause a waste of the heat exchange unit 200. Therefore, arranging the fire bar and the heat exchange unit 200 in the same direction can facilitate maintenance and reduce maintenance costs.

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0074] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0075] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0076] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0077] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0079] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A heat exchange structure, characterized in that: include: a shell, wherein a flow channel is provided in the shell; and A heat exchange unit, wherein there are at least two heat exchange units, the heat exchange units are detachably connected to the housing, the heat exchange units are arranged side by side, and the heat exchange units are located in the flow channel and are used for heat exchange; The shell is provided with a socket connected to the flow channel, the socket is arranged corresponding to the heat exchange unit, and the end of the heat exchange unit is used to be inserted into the socket; The heat exchange unit comprises fins and heat exchange tubes, the heat exchange tubes are passed through the fins, the ends of the heat exchange tubes extend out of the flow channel from the sockets, and different heat exchange tubes are connected in sequence; The heat exchange structure further includes a connecting pipe and a sealing ring, wherein the connecting pipe is used to connect different heat exchange pipes, the sealing ring is sleeved outside the connecting pipe or outside the heat exchange pipe, and the sealing ring is arranged between the connecting pipe and the heat exchange pipe; The heat exchange structure also includes a sleeve and an open tube clamp, the sleeve is sleeved outside the heat exchange tube, the first end of the sleeve is provided with a first flange, the second end of the sleeve is provided with a mounting groove for installing the sealing ring, the connecting tube is sleeved outside the second end of the sleeve, the end of the connecting tube is provided with a second flange in contact with the first flange, the side wall of the open tube clamp is provided with a sliding groove matching the first flange and the second flange, and the open tube clamp is used to clamp the connecting tube.

2. The heat exchange structure according to claim 1, characterized in that: The flow channel is arranged in the longitudinal direction, and the heat exchange units are arranged in sequence in the transverse direction.

3. The heat exchange structure according to claim 1, characterized in that: It also includes a coil, the flow channel includes a combustion zone and a heat exchange zone arranged in sequence along the longitudinal direction, the heat exchange unit is arranged in the heat exchange zone, the different heat exchange tubes are connected in sequence to form a heat exchange pipeline, the heat exchange pipeline includes an inlet end and an outlet end, the coil is connected to the inlet end or the outlet end, the coil is wound outside the shell and is arranged corresponding to the combustion zone.

4. The heat exchange structure according to claim 3, characterized in that: The coil is spirally wound outside the shell.

5. The heat exchange structure according to claim 1, characterized in that: 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.

6. The heat exchange structure according to any one of claims 3 to 5, characterized in that: The heat exchange unit further includes a frame, the fins are arranged in the frame, the heat exchange tubes pass through the frame and the fins, and the frame is arranged in the flow channel.

7. The heat exchange structure according to claim 6, characterized in that: The frame includes a front end plate, a rear end plate and a frame member, the two ends of the frame member are respectively connected to the front end plate and the rear end plate, there are four frame members, and the frame members are provided with notches matching the corners of the fins, and the heat exchange tubes pass through the front end plate and the rear end plate.

8. A gas water heater, characterized in that: It comprises a burner and a heat exchange structure as described in any one of claims 1 to 7, wherein the burner is arranged in the flow channel.

9. The gas water heater according to claim 8, characterized in that: The burner comprises at least two fire bars, the fire bars are arranged corresponding to the heat exchange unit, the fire bars are arranged below the heat exchange unit, and the fire bars and the heat exchange unit are arranged in the same direction.

Images