Heat exchanger and gas water heater comprising same

Abstract

The heat exchanger comprises a heat exchanger body and a lifting mechanism, the heat exchanger body is provided with two end portions which are oppositely arranged in the first direction, the bottom of at least one end portion is provided with an inclined face which is inclined downwards, and the lifting mechanism is arranged on the bottom of at least one end portion. The inclined surfaces extend from the end parts to the direction close to the middle of the heat exchanger body; the lifting mechanism comprises a driving assembly and a moving part, the driving assembly has a first state and a second state, and the moving part is provided with a sliding surface matched with the inclined surface; the driving assembly is configured to be in a first state in the process of rising from the first temperature to the second temperature and drives the moving part to move in the direction close to the middle of the heat exchanger body. The driving assembly is configured to be in a second state in the process of reducing the second temperature to the first temperature, and drives the moving part to move in the direction away from the middle of the heat exchanger body. According to the heat exchanger, the position of the moving part is adjusted through the driving assembly so that the heat exchanger body can move.

Description

Technical Field

[0001] The utility model relates to a heat exchanger and a gas water heater comprising the heat exchanger. Background Art

[0002] Gas water heaters have the characteristics of fast hot water output, good constant temperature performance, high efficiency and energy saving, etc. In modern life, they are loved by more and more families. Gas water heaters mainly include three systems: water system, gas system and electronic control system. The water system includes heat exchangers and water inlet and outlet joints.

[0003] The position of existing heat exchangers is generally fixed, and the distance between the heat exchanger and the flame cannot be adjusted according to the actual working state, which results in low flue gas temperature and flame height and insufficient heat exchange when burning at low power in low stage; when burning at high power in high stage, the flue gas temperature and flame height are high, and the heat exchange fins and heat exchange tubes are easily burned through, shortening the service life, and failing to ensure the heat exchange efficiency is in the best state. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect in the prior art that the distance between the heat exchanger and the flame cannot be adjusted according to the actual working state, and to provide a heat exchanger and a gas water heater containing the same.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a heat exchanger, which comprises:

[0007] A heat exchanger body, wherein the heat exchanger body has two ends arranged opposite to each other along a first direction, and a bottom of at least one of the ends is provided with an inclined surface inclined downward, and the inclined surface extends from the end toward a direction close to the middle of the heat exchanger body;

[0008] A lifting mechanism, the lifting mechanism comprising a driving assembly and a moving member, the driving assembly having a first state and a second state, the moving member having a sliding surface matching the inclined surface;

[0009] The driving component is configured to be in the first state during the process of rising from the first temperature to the second temperature, and to drive the moving part to move toward the middle of the heat exchanger body; the driving component is configured to be in the second state during the process of falling from the second temperature to the first temperature, and to drive the moving part to move away from the middle of the heat exchanger body.

[0010] In the present solution, the above-mentioned structural form is adopted, and the position of the moving part relative to the heat exchanger body is adjusted by the driving component according to the actual working conditions, so as to realize the movement of the heat exchanger body in the direction closer to or away from the high-temperature flame, so that when the combustion is under high load, the risk of the heat exchanger body being directly burned is reduced; when the combustion is under low load, the heat exchange efficiency is improved, so that the distance between the heat exchanger body and the flame and the heat exchange efficiency can be in the optimal state.

[0011] Preferably, along a second direction perpendicular to the first direction, lifting mechanisms are respectively provided at both ends of the heat exchanger body.

[0012] In this solution, the above-mentioned structural form is adopted, and by arranging lifting mechanisms at both ends of the heat exchanger body, the supporting force of the heat exchanger body can be increased, thereby enhancing the stability of the heat exchanger body during the up and down movement.

[0013] Preferably, the two ends of the heat exchanger body are both provided with the inclined surfaces, and the moving member comprises a first moving member and a second moving member respectively matched with the two inclined surfaces;

[0014] The first moving member and the second moving member are configured so that when the driving component is in the first state, they can be driven by the driving component to move in opposite directions; the first moving member and the second moving member are configured so that when the driving component is in the second state, they can be driven by the driving component to move in opposite directions.

[0015] In the present solution, the above-mentioned structural form is adopted. When the driving component is in the first state, the first movable member and the second movable member move toward each other to respectively support the two ends of the heat exchanger body, thereby realizing the upward movement of the heat exchanger body; when the driving component is in the second state, the first movable member and the second movable member move away from each other to realize the descent of the two ends of the heat exchanger body, so as to avoid the heat exchanger body from tipping to one side during the lifting and lowering process, thereby enhancing the stability of the heat exchanger body during the lifting and lowering process.

[0016] Preferably, the heat exchanger body comprises a support frame and a heat exchange tube, the heat exchange tube is arranged to penetrate the support frame, and the inclined surface is arranged on the support frame.

[0017] In this solution, the above-mentioned structural form is adopted, and the support frame plays a supporting role for the heat exchange tubes; in addition, multiple heat exchange tubes are integrated into the support frame, so that the multiple heat exchange tubes can move synchronously.

[0018] Preferably, the heat exchanger comprises a shell, the heat exchanger body is arranged in the shell, and the shell is provided with accommodating parts for accommodating the support frame at both ends of the heat exchange tube, and the lifting mechanism is placed in the accommodating parts and supports the support frame.

[0019] In this solution, the above-mentioned structural form is adopted, and the shell provides a storage space for the lifting mechanism and the heat exchanger body, which is conducive to improving space utilization.

[0020] Preferably, a guide plate is installed on the shell, a guide hole is opened on the guide plate, the heat exchange tube is arranged through the guide hole, and the guide hole extends along the height direction of the heat exchanger body.

[0021] In this solution, the above-mentioned structural form is adopted, and the driving assembly drives the heat exchange tube to move in the guide hole, and the guide hole provides guidance for the moving direction of the heat exchange tube, so that the heat exchange tube can move according to the preset trajectory. In addition, the guide hole limits the heat exchange tube to prevent the heat exchange tube from detaching from the shell during the upward movement.

[0022] Preferably, the shell is provided with end plates at the ends of the heat exchange tubes, the accommodating portion is formed between the end plates and the guide plates, and the two sides of the support frame are respectively against the end plates and the guide plates.

[0023] In this solution, the above-mentioned structural form is adopted, and a guide rail is formed between the end plate and the guide plate. The end plate and the guide plate provide guidance for the moving direction of the support frame and limit the support frame at the same time.

[0024] Preferably, the driving assembly comprises a first memory alloy elastic member, and two ends of the first memory alloy elastic member are respectively connected to the first moving member and the second moving member;

[0025] The first memory alloy elastic member is configured to contract when in the first state and to extend when in the second state.

[0026] In this solution, the above-mentioned structural form is adopted, and the distance between the heat exchanger body and the high-temperature flame can be adjusted according to the change of temperature through the first memory alloy elastic member, which has a fast response and high reliability.

[0027] Preferably, the driving assembly comprises two second memory alloy elastic members, wherein two ends of one of the second memory alloy elastic members are respectively connected to a side wall of the first moving member away from the second moving member and the housing, and two ends of the other second memory alloy elastic member are respectively connected to a side wall of the second moving member away from the first moving member and the housing;

[0028] The second memory alloy elastic member is configured to be extended when in the first state, and to be contracted when in the second state.

[0029] In this solution, the above-mentioned structural form is adopted to realize the position change of the first movable member and the second movable member through two second memory alloy elastic members, thereby realizing that the distance between the heat exchanger body and the high-temperature flame can be adjusted according to the temperature change, and the reliability is high.

[0030] Preferably, the driving assembly comprises two paraffin containing chambers, wherein the paraffin containing chambers are filled with paraffin;

[0031] One of the paraffin containing cavities is located between a side wall of the first moving member away from the second moving member and the inner wall of the shell, and the other paraffin containing cavity is located between a side wall of the second moving member away from the first moving member and the inner wall of the shell;

[0032] The driving assembly further includes an elastic member, which is located between the first moving member and the second moving member, and two ends of the elastic member abut against the first moving member and the second moving member respectively.

[0033] In this solution, the above-mentioned structural form is adopted, and there is no need for electric drive. The distance between the heat exchanger body and the flame can be adjusted according to the change of temperature through paraffin, which has fast response and high reliability.

[0034] The utility model also provides a gas water heater, which comprises the heat exchanger as described above.

[0035] The positive and progressive effects of the utility model are:

[0036] The heat exchanger in the utility model adjusts the position of the moving part relative to the heat exchanger body according to the actual working conditions through the driving component, so as to realize the movement of the heat exchanger body in the direction close to or away from the high-temperature flame, so that when the combustion is under high load, the risk of the heat exchanger body being directly burned is reduced; when the combustion is under low load, the heat exchange efficiency is improved, so that the distance between the heat exchanger body and the flame and the heat exchange efficiency can be in the optimal state. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of a heat exchanger according to Embodiment 1 of the present utility model.

[0038] Figure 2 This is a schematic diagram of the partial structure of the heat exchanger of Example 1 of the utility model.

[0039] Figure 3 This is a cross-sectional view of a heat exchanger according to Embodiment 1 of the present invention.

[0040] Figure 4 It is a schematic structural diagram of the shell of the first embodiment of the utility model.

[0041] Figure 5 It is a cross-sectional view of the shell of the first embodiment of the present utility model.

[0042] Figure 6 It is a schematic diagram of the structure of the support frame of the first embodiment of the utility model.

[0043] Figure 7 This is a cross-sectional view of the heat exchanger of the second embodiment of the present utility model.

[0044] Figure 8 This is a cross-sectional view of the heat exchanger of Embodiment 3 of the present invention.

[0045] Description of reference numerals:

[0046] Heat exchanger body 1

[0047] Incline 11

[0048] Support frame 12

[0049] The first support plate 121

[0050] First through hole 1211

[0051] The second support plate 122

[0052] The second through hole 1221

[0053] Connecting plate 123

[0054] Heat exchange tube 13

[0055] Heat exchange fin 14

[0056] Lifting mechanism 2

[0057] Drive assembly 21

[0058] The first memory alloy elastic member 211

[0059] The first elastic member 212

[0060] Second memory alloy elastic member 213

[0061] The second elastic member 214

[0062] Paraffin wax chamber 215

[0063] Housing 2151

[0064] The third elastic member 216

[0065] Putter 217

[0066] Moving parts 22

[0067] Sliding surface 221

[0068] First moving member 222

[0069] The second moving member 223

[0070] Shell 3

[0071] Accommodation portion 31

[0072] Guide plate 32

[0073] Guide hole 321

[0074] End plate 33 DETAILED DESCRIPTION

[0075] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the following embodiments.

[0076] Example 1

[0077] Please combine Figures 1 to 6 For understanding, an embodiment of the utility model provides a heat exchanger, which includes a heat exchanger body 1 and a lifting mechanism 2, wherein the heat exchanger body 1 has two ends arranged opposite to each other along a first direction, and the bottom of at least one end is provided with a downwardly inclined slope 11, and the slope 11 extends from the end toward the direction close to the middle of the heat exchanger body 1; the lifting mechanism 2 includes a driving component 21 and a moving part 22, the driving component 21 has a first state and a second state, and the moving part 22 has a sliding surface 221 matching the slope 11; wherein the driving component 21 is configured to be in the first state during the process of rising from the first temperature to the second temperature, and drives the moving part 22 to move toward the direction close to the middle of the heat exchanger body 1; the driving component 21 is configured to be in the second state during the process of falling from the second temperature to the first temperature, and drives the moving part 22 to move away from the middle of the heat exchanger body 1.

[0078] In this embodiment, the high-temperature flame flows upward through the heat exchanger body 1. During the heat exchange process, the flame heats the heat exchanger body 1. The driving component 21 switches between the first state and the second state as the temperature changes, driving the moving part 22 to move relative to the heat exchanger body 1 to achieve the sliding of the sliding surface 221 relative to the inclined surface 11, thereby driving the heat exchange tube body 1 to move in a direction closer to or away from the high-temperature flame. Specifically, during high-load combustion, the temperature is in the process of rising from the first temperature to the second temperature. During this stage, the drive component 21 is in the first state, driving the movable part 22 to move toward the middle of the heat exchanger body 1, so that the sliding surface 221 of the movable part 22 moves toward the middle relative to the inclined surface 11 to support the heat exchanger body 1, thereby achieving the upward movement of the heat exchanger body 1 to move away from the high-temperature flame, so as to reduce the risk of the high-temperature flame directly burning the heat exchange tube 13 inside the heat exchanger body 1 and improve the service life; during low-load combustion, the temperature is in the process of falling from the second temperature to the first temperature. During this stage, the drive component 21 is in the second state, driving the movable part 22 to move toward the end of the heat exchanger body 1, so that the sliding surface 221 of the movable part 22 moves toward the end relative to the inclined surface 11, and the heat exchanger body 1 supported by the movable part 22 gradually descends, shortening the distance between the heat exchanger body 1 and the high-temperature flame, thereby improving the heat exchange efficiency. It can be seen that the position of the movable part 22 relative to the heat exchanger body 1 is adjusted by the driving component 21 according to the actual working conditions, so as to realize the movement of the heat exchanger body 1 in the direction closer to or away from the high-temperature flame, so that when the load is high, the risk of the heat exchanger body 1 being directly burned is reduced; when the load is low, the heat exchange efficiency is improved, so that the distance between the heat exchanger body 1 and the flame and the heat exchange efficiency can be in the best state.

[0079] In this embodiment, the width direction of the heat exchanger body 1 can be used as the first direction. In other embodiments, the length direction of the heat exchanger body 1 can also be used as the first direction.

[0080] In this embodiment, if Figure 2 As shown, along the second direction perpendicular to the first direction, lifting mechanisms 2 are respectively provided at both ends of the heat exchanger body 1. Among them, the length direction of the heat exchanger body 1 can be used as the second direction. By respectively providing the lifting mechanisms 2 at both ends of the heat exchanger body 1, the support force of the heat exchanger body 1 can be increased, thereby enhancing the stability of the heat exchanger body 1 during the up and down movement. In addition, it can also avoid the situation where one set of the lifting mechanisms 2 fails and ultimately fails to drive the heat exchanger body 1 to rise and fall.

[0081] In this embodiment, if Figure 2 and Figure 3As shown, both ends of the heat exchanger body 1 are provided with inclined surfaces 11, and the moving member 22 includes a first moving member 222 and a second moving member 223 respectively matched with the two inclined surfaces 11; the first moving member 222 and the second moving member 223 are configured to be driven by the driving assembly 21 to move in opposite directions when the driving assembly 21 is in the first state; the first moving member 222 and the second moving member 223 are configured to be driven by the driving assembly 21 to move in opposite directions when the driving assembly 21 is in the second state. When the driving assembly 21 is in the first state, the first moving member 222 and the second moving member 223 move toward each other to support the two ends of the heat exchanger body 1 respectively, thereby realizing the upward movement of the heat exchanger body 1; when the driving assembly 21 is in the second state, the first moving member 222 and the second moving member 223 move away from each other to realize the descent of the two ends of the heat exchanger body 1, so as to avoid the heat exchanger body 1 from tipping to one side during the lifting process, and enhance the stability of the heat exchanger body 1 during the lifting process.

[0082] In this embodiment, if Figure 2 and Figure 3 As shown, the heat exchanger body 1 includes a support frame 12 and a heat exchange tube 13, the heat exchange tube 13 is arranged through the support frame 12, and the inclined surface 11 is arranged on the support frame 12. In the process of the drive component 21 switching between the first state and the second state as the temperature changes, the drive component 21 drives the support frame 12 to rise and fall, thereby adjusting the distance between the heat exchange tube 13 passing through the support frame 12 and the high-temperature flame. On the one hand, the support frame 12 plays a supporting role for the heat exchange tube 13; on the other hand, multiple heat exchange tubes 13 are integrated into the support frame 12, so that multiple heat exchange tubes 13 can move synchronously.

[0083] like Figure 2 and Figure 5 As shown, the support frame 12 includes a first support plate 121 and a second support plate 122 arranged at intervals, the first support plate 121 and the second support plate 122 are connected by a connecting plate 123, both ends of the connecting plate 123 are respectively provided with inclined surfaces 11, and the end of the heat exchange tube 13 passes through the second support plate 122 and the first support plate 121 in sequence. The first support plate 121 and the second support plate 122 jointly support the heat exchange tube 13, and the support stability is high.

[0084] In this embodiment, if Figures 2 to 5 As shown, the heat exchanger includes a shell 3, a heat exchanger body 1 is arranged in the shell 3, and a receiving portion 31 for receiving the support frame 12 is arranged at both ends of the heat exchange tube 13 on the shell 3, and the lifting mechanism 2 is placed in the receiving portion 31 and supports the support frame 12. The shell 3 provides a receiving space for the lifting mechanism 2 and the heat exchanger body 1, which is conducive to improving space utilization.

[0085] In this embodiment, if Figure 4 As shown, a guide plate 32 is installed on the shell 3, and a guide hole 321 is opened on the guide plate 32. The heat exchange tube 13 is arranged through the guide hole 321, and the guide hole 321 extends along the height direction of the heat exchanger body 1. The drive component 21 drives the heat exchange tube 13 to move in the guide hole 321, and the guide hole 321 provides guidance for the moving direction of the heat exchange tube 13, so that the heat exchange tube 13 can move according to the preset trajectory. In addition, the guide hole 321 limits the heat exchange tube 13 to prevent the heat exchange tube 13 from detaching from the shell 3 during the upward movement. Specifically, the two ends of the guide plate 32 are installed on the inner wall of the shell 3.

[0086] Specifically, Figure 3 and Figure 4 As shown, two rows and five columns of heat exchange tubes 13 are arranged in the shell 3 , and five spaced guide holes 321 extending up and down are opened on the guide plate 32 . Two heat exchange tubes 13 in each column pass through the same guide hole 321 .

[0087] Specifically, the first support plate 121 is provided with a first through hole 1211 for the heat exchange tube 13 to pass through, the second support plate 122 is provided with a second through hole 1221 for the heat exchange tube 13 to pass through, and the end of the heat exchange tube 13 passes through the guide hole 321, the second through hole 1221 and the first through hole 1211 in sequence.

[0088] In this embodiment, if Figure 4 and Figure 5 As shown, the shell 3 is provided with end plates 33 at the ends of the heat exchange tubes 13, and a receiving portion 31 is formed between the end plates 33 and the guide plates 32. The two sides of the support frame 12 are respectively against the end plates 33 and the guide plates 32. A guide rail is formed between the end plates 33 and the guide plates 32, and the end plates 33 and the guide plates 32 provide guidance for the moving direction of the support frame 12 and limit the support frame 12 at the same time.

[0089] Specifically, the housing 3 is provided with a receiving portion 31 at both ends, the number of the guide plates 32 is two, the two guide plates 32 are arranged at intervals along the length direction of the housing 3, and the guide plates 32 are passed through the guide holes 321 at both ends of the heat exchange tube 13.

[0090] In this embodiment, if Figure 2 and Figure 3As shown, the driving assembly 21 includes a first memory alloy elastic member 211, and the two ends of the first memory alloy elastic member 211 are respectively connected to the first moving member 222 and the second moving member 223; wherein the first memory alloy elastic member 211 is configured to contract when in the first state and to extend when in the second state. The first memory alloy elastic member 211 can change its own expansion and contraction amount as the temperature changes. In the process of decreasing from the second temperature to the first temperature, the first memory alloy elastic member 211 is in an extended state (second state), and the first memory alloy elastic member 211 in the extended state drives the first moving member 222 and the second moving member 223 to move in opposite directions to achieve the descent of the heat exchanger body 1; in the process of rising from the first temperature to the second temperature, the first memory alloy elastic member 211 is in a contracted state (first state), thereby achieving the first moving member 222 and the second moving member 223 moving toward each other, thereby achieving the rise of the heat exchanger body 1. The distance between the heat exchanger body 1 and the high-temperature flame can be adjusted according to the change of temperature through the first memory alloy elastic member 211, with fast response and high reliability. For example, the first memory alloy elastic member 211 is a memory alloy spring made of a Fe-Mn-Si based memory alloy, which is easy to process and has good telescopic performance.

[0091] Specifically, Figure 2 and Figure 3As shown, the driving component 21 also includes two first elastic members 212, and the two ends of the first memory alloy elastic member 211 respectively abut the first moving member 222 and the second moving member 223, wherein the two ends of one of the first elastic members 212 are respectively connected to a side wall of the first moving member 222 away from the second moving member 223 and an inner wall of one end of the shell 3, and the two ends of the other first elastic member 212 are respectively connected to a side wall of the second moving member 223 away from the first moving member 222 and an inner wall of the other end of the shell 3, that is, the two first elastic members 212 are respectively located on the outside of the first moving member 222 and the second moving member 223. In the process of decreasing from the second temperature to the first temperature, the first memory alloy elastic member 211 is in an elongated state, and the first memory alloy elastic member 211 in the elongated state drives the first moving member 222 and the second moving member 223 to move to both sides, and the two first elastic members 212 are respectively compressed by the first moving member 222 and the second moving member 223 and are in a compressed state, at this time, the drive assembly 21 is in the second state; in the process of increasing from the first temperature to the second temperature, the first memory alloy elastic member 211 is in a compressed state, and the first memory alloy elastic member 211 no longer squeezes the second moving member 223 of the first moving member 222, and the two first elastic members 212 can gradually stretch to restore to the original state, so as to squeeze the first moving member 222 and the second moving member 223 to move closer to the middle, at this time, the drive assembly 21 is in the first state. Among them, the first elastic member 212 can adopt a W-shaped spring, and optionally, those skilled in the art can also select other forms of the first elastic member 212 as needed.

[0092] In other embodiments, a first mounting portion is provided on a side wall of the first moving member 222 close to the second moving member 223, a second mounting portion is provided on a side wall of the second moving member 223 close to the first moving member 222, two ends of the first memory alloy elastic member 211 are fixedly connected to the first mounting plate and the second mounting portion, and no first elastic member 212 is additionally provided on the outer sides of the first moving member 222 and the second moving member 223. In the process of decreasing from the second temperature to the first temperature, the first memory alloy elastic member 211 stretches and drives the first moving member 222 and the second moving member 223 to move to both sides; in the process of increasing from the first temperature to the second temperature, the first memory alloy elastic member 211 contracts and pulls the first moving member 222 and the second moving member 223 connected thereto to move closer to the middle.

[0093] Example 2

[0094] like Figure 7As shown, the embodiment of the utility model provides a heat exchanger. The structure of the heat exchanger is substantially the same as that of the solution in embodiment 1, except that: the driving assembly 21 in the embodiment includes two second memory alloy elastic members 213, wherein two ends of one second memory alloy elastic member 213 are respectively connected to a side wall of the first moving member 222 away from the second moving member 223 and the housing 3, and two ends of the other second memory alloy elastic member 213 are respectively connected to a side wall of the second moving member 223 away from the first moving member 222 and the housing 3; wherein the second memory alloy elastic member 213 is configured to extend when in the first state and contract when in the second state. The second memory alloy elastic member 213 can change its own expansion and contraction amount as the temperature changes. In the process of rising from the first temperature to the second temperature, the second memory alloy elastic member 213 is in an elongated state (first state). The second memory alloy elastic member 213 in the elongated state drives the first moving member 222 and the second moving member 223 to move closer to the middle to achieve the rise of the heat exchanger body 1; in the process of falling from the second temperature to the first temperature, the second memory alloy elastic member 213 is in a contracted state (second state), thereby achieving the movement of the first moving member 222 and the second moving member 223 to both sides, thereby achieving the decline of the heat exchanger body 1. The position change of the first moving member 222 and the second moving member 223 is achieved by two second memory alloy elastic members 213, thereby achieving the distance between the heat exchanger body 1 and the high-temperature flame can be adjusted according to the change of temperature, with fast response and high reliability. For example, the second memory alloy elastic member 213 is a memory alloy spring made of nickel-titanium-based memory alloy, which is easy to process and has good expansion and contraction performance.

[0095] Specifically, Figure 7As shown, the driving assembly 21 further includes a second elastic member 214, the two ends of the second elastic member 214 are located between the first moving member 222 and the second moving member 223, and the two ends of the second elastic member 214 respectively abut the first moving member 222 and the second moving member 223. The two ends of one of the second memory alloy elastic members 213 respectively abut the side wall of the first moving member 222 away from the second moving member 223 and the inner wall of one end of the housing 3, and the two ends of the other second memory alloy elastic member 213 respectively abut the side wall of the second moving member 223 away from the first moving member 222 and the inner wall of the other end of the housing 3. In the process of rising from the first temperature to the second temperature, the second memory alloy elastic member 213 is in an elongated state, and the second memory alloy elastic member 213 in the elongated state drives the first moving member 222 and the second moving member 223 to move closer to the middle, and the second elastic member 214 is squeezed by the first moving member 222 and the second moving member 223 and is in a compressed state. At this time, the drive assembly 21 is in the first state; in the process of the second temperature dropping to the first temperature, the second memory alloy elastic member 213 is in a contracted state, no longer squeezing the first moving member 222 and the second moving member 223, and the second elastic member 214 can gradually stretch to restore to the original state, thereby driving the first moving member 222 and the second moving member 223 to move in opposite directions. At this time, the drive assembly 21 is in the second state. Among them, the second elastic member 214 can be a spring, and optionally, those skilled in the art can also select other forms of the second elastic member 214 as needed.

[0096] In other embodiments, the two ends of one second memory alloy elastic member 213 are respectively fixedly connected to a side wall of the first movable member 222 away from the second movable member 223 and an inner wall of one end of the shell 3, and the two ends of the other second memory alloy elastic member 213 are respectively fixedly connected to a side wall of the second movable member 223 away from the first movable member 222 and an inner wall of the other end of the shell 3, and no second elastic member 214 is additionally arranged between the first movable member 222 and the second movable member 223.

[0097] Example 3

[0098] like Figure 8As shown, the embodiment of the utility model provides a heat exchanger. The difference between the embodiment 1 and the scheme is that the driving assembly 21 includes a third elastic member 216 and two paraffin containing chambers 215, wherein one paraffin containing chamber 215 is located between the side wall of the first moving member 222 away from the second moving member 223 and the inner wall of the shell 3, and the other paraffin containing chamber 215 is located between the side wall of the second moving member 223 away from the first moving member 222 and the inner wall of the shell 3, wherein the paraffin containing chamber 215 is filled with paraffin, the third elastic member 216 is located between the first moving member 222 and the second moving member 223, and the two ends of the elastic member abut against the first moving member 222 and the second moving member 223 respectively. The paraffin in the paraffin containing chamber 215 can change its volume according to the change of temperature, and the paraffin expands when the temperature rises, and shrinks when the temperature drops. In the process of rising from the first temperature to the second temperature, paraffin is in an expanded state, and the paraffin with increased volume drives the first moving member 222 and the second moving member 223 to move closer to the middle, and the third elastic member 216 is squeezed by the first moving member 222 and the second moving member 223 and is in a compressed state, and the heat exchanger body 1 rises, and at this time, the drive assembly 21 is in the first state; in the process of dropping from the second temperature to the first temperature, the paraffin volume decreases, and no longer squeezes the first moving member 222 and the second moving member 223, and the third elastic member 216 elastically recovers and can gradually stretch to drive the first moving member 222 and the second moving member 223 to move in opposite directions, and at this time, the drive assembly 21 is in the second state. Wherein, the third elastic member 216 can adopt a spring, and optionally, those skilled in the art can also select other forms of the third elastic member 216 as needed. The heat exchanger of this embodiment does not need to be driven by electricity, and the distance between the heat exchanger body 1 and the flame can be adjusted according to the change of temperature through paraffin, and the response is fast and the reliability is high.

[0099] Specifically, Figure 8 As shown, the driving assembly 21 also includes two accommodating shells 2151 and two push rods 217. The accommodating shells 2151 enclose a paraffin accommodating chamber 215, one end of one push rod 217 abuts against a side wall of the first moving member 222 away from the second moving member 223, and the other end extends into the accommodating shell 2151 to abut against the paraffin. The end of the accommodating shell 2151 corresponding to the push rod 217 away from the push rod 217 abuts against an inner wall of one end of the housing 3, and the outer periphery of the push rod 217 The wall fits with the inner wall of the containing shell 2151 to prevent the paraffin from melting due to heat and flowing out of the gap between the containing shell 2151 and the push rod 217, so as to affect the normal use of the heat exchanger; one end of another push rod 217 abuts against the side wall of the second movable part 223 away from the first movable part 222, and the other end extends into the containing shell 2151 to abut against the paraffin, and the end of the containing shell 2151 corresponding to the push rod 217 away from the push rod 217 abuts against the inner wall of one end of the shell 3.

[0100] In other embodiments, the side wall of the first movable member 222 away from the second movable member 223, the first support plate 121, the inner wall of the shell 3, the end plate 33 and the connecting plate 123 enclose one paraffin containing cavity 215, and the side wall of the second movable member 223 away from the first movable member 222, the first support plate 121, the inner wall of the shell 3, the end plate 33 and the connecting plate 123 enclose another paraffin containing cavity 215, the first support plate 121 and the second support plate 122 are respectively fitted with the guide plate 32 and the end plate 33, and the two sides of the connecting plate 123 that are not connected to the first support plate 121 and the second support plate 122 are respectively fitted with the inner wall of the shell 3 to seal the paraffin containing cavity 215.

[0101] Example 4

[0102] The utility model provides a gas water heater, which comprises a heat exchanger as described in any of the above embodiments.

[0103] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A heat exchanger, characterized in that: The heat exchanger comprises: A heat exchanger body, the heat exchanger body having two ends disposed opposite to each other along a first direction, the bottom of at least one of the ends being provided with a downwardly inclined surface, the inclined surface extending from the end toward a direction close to the middle of the heat exchanger body; A lifting mechanism, the lifting mechanism comprising a driving assembly and a moving member, the driving assembly having a first state and a second state, the moving member having a sliding surface matching the inclined surface; The driving component is configured to be in the first state during the process of rising from the first temperature to the second temperature, and drive the moving part to move toward the middle of the heat exchanger body; the driving component is configured to be in the second state during the process of falling from the second temperature to the first temperature, and drive the moving part to move away from the middle of the heat exchanger body.

2. The heat exchanger according to claim 1, wherein Along a second direction perpendicular to the first direction, lifting mechanisms are respectively provided at both ends of the heat exchanger body.

3. The heat exchanger according to claim 1, wherein The two ends of the heat exchanger body are both provided with the inclined surfaces, and the moving member includes a first moving member and a second moving member respectively matched with the two inclined surfaces; The first moving member and the second moving member are configured so that when the driving component is in the first state, they can be driven by the driving component to move in opposite directions; the first moving member and the second moving member are configured so that when the driving component is in the second state, they can be driven by the driving component to move in opposite directions.

4. The heat exchanger according to claim 3, wherein The heat exchanger body includes a support frame and a heat exchange tube. The heat exchange tube is arranged through the support frame, and the inclined surface is arranged on the support frame.

5. The heat exchanger according to claim 4, characterized in that The heat exchanger includes a shell, the heat exchanger body is arranged in the shell, and the shell is provided with accommodating parts for accommodating the support frame at both ends of the heat exchange tube. The lifting mechanism is placed in the accommodating parts and supports the support frame.

6. The heat exchanger according to claim 5, characterized in that A guide plate is installed on the shell, a guide hole is opened on the guide plate, the heat exchange tube is arranged through the guide hole, and the guide hole extends along the height direction of the heat exchanger body.

7. The heat exchanger according to claim 6, wherein End plates are provided at the ends of the shell located at both ends of the heat exchange tube, the accommodating portion is formed between the end plates and the guide plates, and both sides of the support frame are respectively against the end plates and the guide plates.

8. The heat exchanger according to any one of claims 3 to 7, characterized in that: The driving assembly includes a first memory alloy elastic member, and two ends of the first memory alloy elastic member are respectively connected to the first moving member and the second moving member; The first memory alloy elastic member is configured to contract when in the first state and to extend when in the second state.

9. The heat exchanger according to any one of claims 5 to 7, characterized in that: The driving assembly includes two second memory alloy elastic members, wherein two ends of one of the second memory alloy elastic members are respectively connected to a side wall of the first moving member away from the second moving member and the housing, and two ends of the other second memory alloy elastic member are respectively connected to a side wall of the second moving member away from the first moving member and the housing; The second memory alloy elastic member is configured to extend in the first state and to contract in the second state.

10. The heat exchanger according to any one of claims 5 to 7, characterized in that: The driving assembly includes two paraffin accommodating cavities, wherein the paraffin accommodating cavities are filled with paraffin; One of the paraffin accommodating chambers is located between a side wall of the first movable member away from the second movable member and the inner wall of the shell, and the other paraffin accommodating chamber is located between a side wall of the second movable member away from the first movable member and the inner wall of the shell; The driving assembly further includes an elastic member, which is located between the first moving member and the second moving member, and two ends of the elastic member respectively abut against the first moving member and the second moving member.

11. A gas water heater, characterized in that: The gas water heater comprises the heat exchanger according to any one of claims 1 to 10.

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