Heat exchanger and gas water heater comprising same

Abstract

The utility model provides a heat exchanger and a gas water heater including the same, the heat exchanger comprises a shell and a heat exchange tube, the shell is provided with a mounting groove with an opening facing the heat exchange tube, a driving piece is arranged in the mounting groove, and the driving piece has a first state and a second state; the driving part is configured to be in the first state in the process of raising the temperature from the first temperature to the second temperature, and drives the heat exchange pipe to move in the direction away from the mounting groove; and the driving piece is configured to be in the second state in the process of reducing the second temperature to the first temperature, and drives the heat exchange pipe to move in the direction close to the mounting groove. The heat exchange tubes move in the direction close to or away from high-temperature flames according to actual working conditions, and the risk that the heat exchange tubes are directly burnt during large-load combustion is reduced; and during small-load combustion, the heat exchange efficiency is improved, so that the distance from the heat exchange tube to flame and the heat exchange efficiency can be in the optimal state.

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] In the existing heat exchanger, the position of the heat exchange tube in the box is fixed, and the distance between the heat exchange tube and the flame cannot be adjusted according to the actual working state, which leads to 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 exchange tube 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, the heat exchanger comprising a shell and a heat exchange tube, the shell is provided with a mounting groove opening toward the heat exchange tube, a driving member is built in the mounting groove, and the driving member has a first state and a second state;

[0007] The driving member 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 heat exchange tube to move in the direction away from the installation groove; the driving member 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 heat exchange tube to move in the direction close to the installation groove.

[0008] In this scheme, the above-mentioned structural form is adopted. When the combustion is carried out under high load, the shell temperature is high, that is, it is in the process of rising from the first temperature to the second temperature. At this stage, the driving member is in the first state, and the driving member drives the heat exchange tube to move in the direction away from the installation groove, that is, the driving member drives the heat exchange tube to move in the direction away from the high-temperature flame, lengthening the distance between the heat exchange tube and the high-temperature flame, thereby reducing the risk of the high-temperature flame directly burning the heat exchange tube and improving the service life; when the combustion is carried out under low load, the shell temperature is low, that is, it is in the process of falling from the second temperature to the first temperature. At this stage, the driving member is in the second state, and the driving member drives the heat exchange tube to move in the direction close to the installation groove, that is, the driving member drives the heat exchange tube to move in the direction close to the high-temperature flame, shortening the distance between the heat exchange tube and the high-temperature flame, thereby increasing the temperature difference between the inside and outside of the heat exchange tube and improving the heat exchange efficiency. It can be seen that the heat exchange tube moves in the direction close to or away from the high-temperature flame according to the actual working conditions, so that when the combustion is carried out under high load, the risk of the heat exchange tube being directly burned is reduced; when the combustion is carried out under low load, the heat exchange efficiency is improved, so that the distance between the heat exchange tube and the flame and the heat exchange efficiency can be in the best state.

[0009] Preferably, a guide plate is installed on the inner wall surface of 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 moving direction of the heat exchange tube.

[0010] In this solution, the above-mentioned structural form is adopted, and the driving member 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 process of moving away from the installation groove.

[0011] Preferably, the heat exchanger further comprises a support frame, the support frame is provided with a through hole, the hole wall of the through hole matches the outer wall surface of the heat exchange tube, the heat exchange tube is arranged through the through hole, and the driving member supports the support frame.

[0012] In the present solution, the above-mentioned structural form is adopted. On the one hand, the support frame plays a supporting role for the heat exchange tubes; on the other hand, multiple heat exchange tubes are integrated into the support frame so that the multiple heat exchange tubes can move synchronously, reducing or avoiding the situation where a few heat exchange tubes cannot respond in time due to failure of some driving parts.

[0013] Preferably, the support frame includes a first support plate and a second support plate arranged at an interval, the first support plate and the second support plate are connected by a connecting plate, the end of the heat exchange tube passes through the first support plate and the second support plate in sequence, and the driving member supports the connecting plate.

[0014] In this solution, the above-mentioned structural form is adopted, and the first support plate and the second support plate jointly support the heat exchange tube, and the support is stable and high.

[0015] Preferably, an end plate is provided at the end of the shell, the mounting groove is formed between the end plate and the guide plate, and two sides of the support frame are respectively against the end plate and the guide plate.

[0016] 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.

[0017] Preferably, the two ends of the housing are respectively provided with the mounting grooves;

[0018] The number of the guide plates is two, and the two guide plates are arranged at intervals along the length direction of the heat exchange tube. The two ends of the heat exchange tube are respectively penetrated by the guide plates through the guide holes.

[0019] In this solution, the above-mentioned structural form is adopted. During the switching process between high-load combustion and low-load combustion, both ends of the heat exchange tube can be driven by the driving member to move away from or close to the high-temperature flame, thereby improving the movement stability of the heat exchange tube.

[0020] Preferably, the driving member is a memory alloy elastic member.

[0021] In this solution, the above-mentioned structural form is adopted, and no electric drive is required. A memory alloy elastic member is used as a driving member, so that the distance between the heat exchange tube and the flame can be adjusted according to the change of temperature, with fast response and high reliability.

[0022] Preferably, there are a plurality of the memory alloy elastic members, and the plurality of the memory alloy elastic members are arranged at intervals along the length direction of the installation slot.

[0023] In this solution, the above-mentioned structural form is adopted, and multiple memory alloy elastic parts are used to drive the heat exchange tube to move, ensuring that the heat exchange tube can be driven by the memory alloy elastic parts to adjust the distance from the flame according to actual working conditions, with high reliability.

[0024] Preferably, the driving member is paraffin.

[0025] In this solution, the above-mentioned structural form is adopted, and no electric drive is required. Paraffin is used as a driving component to achieve that the distance between the heat exchange tube and the flame can be adjusted according to the change of temperature, with fast response and high reliability.

[0026] The utility model provides a gas water heater, which comprises the heat exchanger as described above.

[0027] The positive and progressive effects of the utility model are:

[0028] When the heat exchanger in the utility model is burning under high load, the shell temperature is high, that is, it is in the process of rising from the first temperature to the second temperature. At this stage, the driving member is in the first state, and the driving member drives the heat exchange tube to move in the direction away from the installation groove, that is, the driving member drives the heat exchange tube to move in the direction away from the high-temperature flame, lengthening the distance between the heat exchange tube and the high-temperature flame, thereby reducing the risk of the high-temperature flame directly burning the heat exchange tube and improving the service life; when the heat exchanger is burning under low load, the shell temperature is low, that is, it is in the process of falling from the second temperature to the first temperature. At this stage, the driving member is in the second state, and the driving member drives the heat exchange tube to move in the direction close to the installation groove, that is, the driving member drives the heat exchange tube to move in the direction close to the high-temperature flame, shortening the distance between the heat exchange tube and the high-temperature flame, thereby increasing the temperature difference between the inside and outside of the heat exchange tube and improving the heat exchange efficiency. It can be seen that the heat exchange tube moves in the direction close to or away from the high-temperature flame according to the actual working conditions, so that when burning under high load, the risk of the heat exchange tube being directly burned is reduced; when burning under low load, the heat exchange efficiency is improved, so that the distance between the heat exchange tube and the flame and the heat exchange efficiency can be in the best state. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of a heat exchanger according to Embodiment 1 of the present utility model.

[0030] Figure 2 This is a cross-sectional view of a heat exchanger according to Embodiment 1 of the present invention.

[0031] Figure 3 This is a schematic diagram of the partial structure of the heat exchanger of Example 1 of the utility model.

[0032] Figure 4 It is a schematic diagram of the structure of the support frame of the first embodiment of the utility model.

[0033] Figure 5 It is a schematic structural diagram of the shell of the first embodiment of the utility model.

[0034] Figure 6 It is a cross-sectional view of the shell of the first embodiment of the present utility model.

[0035] Figure 7 This is a cross-sectional view of the heat exchanger of the second embodiment of the present utility model.

[0036] Description of reference numerals:

[0037] Shell 1

[0038] Mounting slot 11

[0039] Guide plate 12

[0040] Guide hole 13

[0041] End plate 14

[0042] Heat exchange tube 2

[0043] Support frame 3

[0044] Through hole 31

[0045] First support plate 32

[0046] First through hole 321

[0047] Second support plate 33

[0048] The second through hole 331

[0049] Connecting plate 34

[0050] Memory alloy elastic parts 4

[0051] Paraffin 5

[0052] Heat exchange fin 6 DETAILED DESCRIPTION

[0053] 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.

[0054] Example 1

[0055] Please combine Figures 1 to 6 For understanding, the embodiment of the utility model provides a heat exchanger, which includes a shell 1 and a heat exchange tube 2. The shell 1 is provided with a mounting groove 11 with an opening toward the heat exchange tube 2. The mounting groove 11 is provided with a driving member, and the driving member has a first state and a second state. The driving member is configured to be in the first state during the process of rising from the first temperature to the second temperature, and drives the heat exchange tube 2 to move in a direction away from the mounting groove 11; the driving member is configured to be in the second state during the process of falling from the second temperature to the first temperature, and drives the heat exchange tube 2 to move in a direction close to the mounting groove 11.

[0056] In this embodiment, the high-temperature flame outside the shell 1 flows through the heat exchange tube 2 along the self-installing groove 11 in the direction close to the heat exchange tube 2. During the heat exchange process, the flame heats the shell 1, and the driving member switches between the first state and the second state as the temperature of the shell 1 changes, thereby driving the heat exchange tube 2 to move in a direction close to or away from the high-temperature flame. Specifically, during high-load combustion, the temperature of the shell 1 is relatively high, that is, it is in the process of rising from the first temperature to the second temperature. At this stage, the driving member is in the first state, and the driving member drives the heat exchange tube 2 to move in the direction away from the installation groove 11, that is, the driving member drives the heat exchange tube 2 to move in the direction away from the high-temperature flame, thereby lengthening the distance between the heat exchange tube 2 and the high-temperature flame, thereby reducing the risk of the high-temperature flame directly burning the heat exchange tube 2 and improving the service life; during low-load combustion, the temperature of the shell 1 is relatively low, that is, it is in the process of falling from the second temperature to the first temperature. At this stage, the driving member is in the second state, and the driving member drives the heat exchange tube 2 to move in the direction close to the installation groove 11, that is, the driving member drives the heat exchange tube 2 to move in the direction close to the high-temperature flame, thereby shortening the distance between the heat exchange tube 2 and the high-temperature flame, thereby increasing the temperature difference between the inside and outside of the heat exchange tube 2 and improving the heat exchange efficiency. It can be seen that the heat exchange tube 2 moves towards or away from the high-temperature flame according to the actual working conditions, so that when the load is high, the risk of the heat exchange tube 2 being directly burned is reduced; when the load is low, the heat exchange efficiency is improved, so that the distance between the heat exchange tube 2 and the flame and the heat exchange efficiency can be in the best state.

[0057] In this embodiment, if Figure 2 As shown, the driving member is a memory alloy elastic member 4. The memory alloy elastic member 4 can change its own expansion and contraction amount with the change of temperature. When the temperature rises, the memory alloy elastic member 4 extends; when the temperature decreases, the memory alloy elastic member 4 contracts. In the process of rising from the first temperature to the second temperature, the memory alloy elastic member 4 is in an extended state (first state), and the memory alloy elastic member 4 in the extended state drives the heat exchange tube 2 to move in the direction away from the mounting groove 11; in the process of falling from the second temperature to the first temperature, the memory alloy elastic member 4 is in a contracted state (second state), and the memory alloy elastic member 4 in the contracted state drives the heat exchange tube 2 to move in the direction close to the mounting groove 11. The heat exchanger of this embodiment does not need to be driven by electricity, and uses the memory alloy elastic member 4 as the driving member, so that the distance between the heat exchange tube 2 and the flame can be adjusted according to the change of temperature, with fast response and high reliability. Preferably, the driving member is a memory alloy spring, which is easy to process and has good expansion and contraction performance.

[0058] In this embodiment, if Figure 3As shown, there are multiple memory alloy elastic members 4, and the multiple memory alloy elastic members 4 are arranged at intervals along the length direction of the installation groove 11. The multiple memory alloy elastic members 4 are used to drive the heat exchange tube 2 to move, ensuring that the heat exchange tube 2 can be driven by the memory alloy elastic member 4 to adjust the distance from the flame according to the actual working conditions, and the reliability is high. Preferably, the multiple memory alloy elastic members 4 are arranged at equal intervals along the length direction of the installation groove 11.

[0059] In this embodiment, if Figure 1 , Figure 5 and Figure 6 As shown, a guide plate 12 is installed on the inner wall of the shell 1, and a guide hole 13 is opened on the guide plate 12. The heat exchange tube 2 passes through the guide hole 13, and the guide hole 13 extends along the moving direction of the heat exchange tube 2. The driving member drives the heat exchange tube 2 to move in the guide hole 13, and the guide hole 13 provides guidance for the moving direction of the heat exchange tube 2, so that the heat exchange tube 2 can move according to the preset trajectory. In addition, the guide hole 13 limits the heat exchange tube 2 to prevent the heat exchange tube 2 from detaching from the shell 1 during the process of moving away from the installation groove 11.

[0060] Specifically, Figure 1 and Figure 4 As shown, two rows and five columns of heat exchange tubes 2 are arranged in the shell 1 , and five spaced guide holes 13 extending up and down are opened on the guide plate 12 , and two heat exchange tubes 2 in each column pass through the same guide hole 13 .

[0061] In this embodiment, if Figure 1 , Figure 2 and Figure 4 As shown, the heat exchanger also includes a support frame 3, on which a through hole 31 is provided, the hole wall of the through hole 31 matches the outer wall surface of the heat exchange tube 2, the heat exchange tube 2 is arranged to pass through the through hole 31, and the driving member supports the support frame 3. In the process of the driving member switching between the first state and the second state as the temperature of the shell 1 changes, the driving member drives the support frame 3 to move away from or close to the mounting groove 11, thereby adjusting the distance between the heat exchange tube 2 passed through the support frame 3 and the flame. On the one hand, the support frame 3 plays a supporting role for the heat exchange tube 2; on the other hand, multiple heat exchange tubes 2 are integrated into the support frame 3, so that the multiple heat exchange tubes 2 can move synchronously, reducing or avoiding the situation where a few heat exchange tubes 2 cannot respond in time due to the failure of some driving members.

[0062] In this embodiment, if Figure 4As shown, the support frame 3 includes a first support plate 32 and a second support plate 33 arranged at intervals, the first support plate 32 and the second support plate 33 are connected by a connecting plate 34, the ends of the heat exchange tube 2 pass through the first support plate 32 and the second support plate 33 in sequence, and the driving member supports the connecting plate 34. The first support plate 32 and the second support plate 33 jointly support the heat exchange tube 2, and the support is stable. Specifically, the two ends of the memory alloy elastic member 4 respectively abut the bottom of the installation groove 11 and the connecting plate 34.

[0063] Specifically, the first support plate 32 is provided with a first through hole 321 for the heat exchange tube 2 to pass through, the second support plate 33 is provided with a second through hole 331 for the heat exchange tube 2 to pass through, and the end of the heat exchange tube 2 passes through the guide hole 13, the first through hole 321 and the second through hole 331 in sequence.

[0064] In this embodiment, if Figure 2 and Figure 6 As shown, an end plate 14 is provided at the end of the housing 1, and a mounting groove 11 is formed between the end plate 14 and the guide plate 12, and the two sides of the support frame 3 are respectively against the end plate 14 and the guide plate 12. A guide rail is formed between the end plate 14 and the guide plate 12, and the end plate 14 and the guide plate 12 provide guidance for the moving direction of the support frame 3 and limit the support frame 3 at the same time.

[0065] In this embodiment, if Figure 2 As shown, mounting grooves 11 are respectively provided at both ends of the shell 1, and there are two guide plates 12, which are arranged at intervals along the length direction of the heat exchange tube 2, and the guide plates 12 are respectively passed through the guide holes 13 at both ends of the heat exchange tube 2. During the switching process between the high-load combustion state and the low-load combustion state, both ends of the heat exchange tube 2 can be driven by the driving member to move away from or close to the high-temperature flame, thereby improving the movement stability of the heat exchange tube 2.

[0066] In this embodiment, if Figure 1 and Figure 2 As shown, a heat exchange fin 6 is provided in the shell 1 , a plurality of heat exchange fins 6 are stacked in sequence, and the heat exchange tube 2 is arranged through the heat exchange fin 6 .

[0067] Example 2

[0068] like Figure 7As shown, an embodiment of the utility model provides a heat exchanger. The difference between the solution in Example 1 is that the driving component is paraffin 5. Paraffin 5 can change its volume according to the change of temperature. When the temperature rises, the paraffin 5 expands; when the temperature decreases, the paraffin 5 contracts. In the process of rising from the first temperature to the second temperature, the paraffin 5 is in an expansion state (first state), and the paraffin 5 with an increased volume drives the heat exchange tube 2 to move in the direction away from the installation groove 11; in the process of falling from the second temperature to the first temperature, the paraffin 5 is in a contraction state (second state), and the paraffin 5 with a reduced volume drives the heat exchange tube 2 to move in the direction close to the installation groove 11. The heat exchanger of this embodiment does not need to be driven by electricity, and uses paraffin 5 as a driving component, so that the distance between the heat exchange tube 2 and the flame can be adjusted according to the change of temperature, with fast response and high reliability.

[0069] Specifically, the bottom of the mounting groove 11, the guide plate 12, the connecting plate 34 and the end plate 14 enclose a accommodating space, in which paraffin 5 is filled, and the first support plate 32 and the second support plate 33 are respectively fitted with the guide plate 12 and the end plate 14, and the two sides of the connecting plate 34 that are not connected to the first support plate 32 and the second support plate 33 are respectively fitted with the inside of the shell 1 to seal the accommodating space to prevent the paraffin 5 from flowing out from the gap between the support frame 3 and the shell 1 after being melted by heat, so as to affect the normal use of the heat exchanger.

[0070] Example 3

[0071] The utility model provides a gas water heater, which comprises a heat exchanger as described in any of the above embodiments.

[0072] 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 shell and a heat exchange tube, the shell is provided with a mounting groove opening toward the heat exchange tube, a driving member is built in the mounting groove, and the driving member has a first state and a second state; The driving member 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 heat exchange tube to move in the direction away from the installation groove; the driving member 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 heat exchange tube to move in the direction close to the installation groove.

2. The heat exchanger according to claim 1, characterized in that A guide plate is installed on the inner wall surface of the shell. A guide hole is opened on the guide plate. The heat exchange tube passes through the guide hole, and the guide hole extends along the moving direction of the heat exchange tube.

3. The heat exchanger according to claim 2, characterized in that The heat exchanger further comprises a support frame, a through hole is formed on the support frame, a hole wall of the through hole matches an outer wall surface of the heat exchange tube, the heat exchange tube is arranged to pass through the through hole, and the driving member supports the support frame.

4. The heat exchanger according to claim 3, characterized in that The support frame includes a first support plate and a second support plate which are spaced apart from each other. The first support plate and the second support plate are connected via a connecting plate. The ends of the heat exchange tubes pass through the first support plate and the second support plate in sequence. The driving member supports the connecting plate.

5. The heat exchanger according to claim 3, characterized in that An end plate is provided at the end of the shell, the mounting groove is formed between the end plate and the guide plate, and two sides of the support frame are respectively against the end plate and the guide plate.

6. The heat exchanger according to claim 2, characterized in that The two ends of the shell are respectively provided with the mounting grooves; There are two guide plates, which are spaced apart along the length direction of the heat exchange tube. Both ends of the heat exchange tube are respectively provided with the guide plates through the guide holes.

7. The heat exchanger according to any one of claims 1 to 6, characterized in that: The driving member is a memory alloy elastic member.

8. The heat exchanger according to claim 7, characterized in that There are multiple memory alloy elastic parts, and the multiple memory alloy elastic parts are arranged at intervals along the length direction of the installation groove.

9. The heat exchanger according to any one of claims 1 to 6, characterized in that: The driving member is paraffin.

10. A gas water heater, characterized in that: The gas water heater comprises a heat exchanger as claimed in any one of claims 1 to 9.

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