Combustor and heat exchanger combined structure and gas water heater

Abstract

The utility model discloses a combined structure of a burner and a heat exchanger and a gas water heater. The combined structure of the combustor and the heat exchanger comprises the heat exchanger and a combustor assembly, and the combustor assembly comprises a closed shell, a combustor, a fuel gas supply assembly and an air supply assembly; an opening is formed in the top of the shell, the combustor is arranged in the shell, the fuel gas supply assembly is used for supplying fuel gas to the combustor, and the air supply assembly is used for conveying air into the shell; the shell is provided with an opening, the heat exchanger is fixed at the top of the shell and covers the opening, the heat exchanger comprises an outer frame, heat exchange fins arranged in the outer frame and a heat exchange pipeline fixed on the outer frame, the heat exchange pipeline comprises a plurality of straight pipes, the straight pipes penetrate through the heat exchange fins, and all the straight pipes are parallel to one another and are arranged in a row in the horizontal direction. According to the utility model, the distance between the heat exchanger and the burner can be reduced, and the heat loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters, in particular to a combined structure of a burner and a heat exchanger and a gas water heater. Background Art

[0002] Existing gas water heaters mainly include a heat exchanger and a burner arranged below the heat exchanger. For example, Chinese utility model patent with publication number CN218763967U discloses a gas water heater. Since the pipes inside the heat exchanger are arranged in a trapezoidal shape, a higher flame is required, and the height of the shell of the heat exchanger is correspondingly designed to be larger. The shell absorbs more heat but is not effectively utilized, and the heat loss is high. Utility Model Content

[0003] The utility model provides a combined structure of a burner and a heat exchanger and a gas water heater, which can reduce the distance between the heat exchanger and the burner and reduce heat loss.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] According to the first aspect of the utility model, an embodiment of the utility model provides a combination structure of a burner and a heat exchanger, including a heat exchanger and a burner assembly, wherein the burner assembly includes a sealed shell, a burner, a gas supply assembly and an air supply assembly; an opening is provided at the top of the shell, the burner is arranged in the shell, the gas supply assembly is used to supply gas to the burner, and the air supply assembly is used to transport air into the shell; the heat exchanger is fixed to the top of the shell and covers the opening, the heat exchanger includes an outer frame, heat exchange fins arranged in the outer frame, and a heat exchange pipe fixed on the outer frame, the heat exchange pipe includes a plurality of straight pipes, the straight pipes pass through the heat exchange fins, and all the straight pipes are parallel to each other and arranged in a row in the horizontal direction.

[0006] In some embodiments, the outer frame includes a main frame, an upper frame body and a lower frame body, the upper frame body is located at the top of the main frame and is sleeved on the outside of the main frame, and the lower frame body is located at the bottom of the main frame and is sleeved on the outside of the main frame.

[0007] In some embodiments, an upper flange is provided at the top opening of the main frame, and the upper flange is tightly fixed to the top surface of the upper frame body. A lower flange is provided at the bottom opening of the main frame, and the lower flange is tightly fixed to the bottom surface of the lower frame body.

[0008] In some embodiments, an upper inner turn-down extending downward is provided on the inner side of the upper frame body, and a lower inner turn-down extending upward is provided on the inner side of the lower frame body, and both the upper inner turn-down and the lower inner turn-down abut against the outer side surface of the main frame.

[0009] In some embodiments, the straight tubes are evenly distributed along their arrangement direction, and the intervals between two adjacent straight tubes are equal.

[0010] In some embodiments, a spoiler spring is disposed in the straight tube.

[0011] In some embodiments, the burner includes multiple fire bar single pieces, and the gas supply assembly includes a gas supply seat and an air inlet pipe arranged on the surface of the shell, a gas supply cavity is arranged in the gas supply seat, and the inner wall of the gas supply cavity is provided with gas supply holes that penetrate to the inner side surface of the shell and connect with the fire bar single piece, and the air inlet pipe is connected to the gas supply cavity.

[0012] In some embodiments, the gas supply assembly also includes a valve body, the gas supply cavity includes a first gas supply cavity, a second gas supply cavity and a third gas supply cavity that are independent of each other, and the air inlet pipe includes a first air inlet pipe and a second air inlet pipe; the first air inlet pipe is connected to the first gas supply cavity, and the second air inlet pipe is connected to the second gas supply cavity, and the valve body is used to control the connection or isolation between the first gas supply cavity and the third gas supply cavity, the number of air supply holes on the inner wall of the first gas supply cavity is smaller than the number of air supply holes on the inner wall of the second gas supply cavity, and the number of air supply holes on the inner wall of the second gas supply cavity is smaller than the number of air supply holes on the inner wall of the third gas supply cavity.

[0013] In some embodiments, the air supply assembly includes a blower fixed to the housing, and the blower is used to deliver air to a portion of the housing below the burner.

[0014] According to a second aspect of the utility model, an embodiment of the utility model provides a gas water heater, comprising a combined structure of a burner and a heat exchanger as described in any of the above embodiments.

[0015] The utility model has at least the following beneficial effects: the heat exchanger of the utility model adopts straight tubes, and all the straight tubes are parallel to each other and arranged in a row in the horizontal direction. The flame of the burner only needs to heat a single row of straight tubes, which can reduce the distance between the heat exchanger and the burner, reduce the overall height, and effectively save space; at the same time, the burner assembly adopts a closed shell, which reduces the heat transfer to the outside, and the reduction of the flame height also reduces the heat absorbed by the shell, thereby reducing heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a combined structure of a burner and a heat exchanger according to an embodiment of the utility model;

[0017] Figure 2 This is a schematic structural diagram of a heat exchanger according to an embodiment of the utility model;

[0018] Figure 3This is an exploded schematic diagram of a heat exchanger according to an embodiment of the utility model;

[0019] Figure 4 This is a schematic structural diagram of a burner assembly according to an embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of a gas water heater according to an embodiment of the utility model;

[0021] Figure 6 This is a schematic structural diagram of a gas water heater according to an embodiment of the utility model with the panel removed.

[0022] Wherein, the accompanying drawings are marked as follows:

[0023] Heat exchanger 100, outer frame 110, main frame 111, upper flange 1111, lower flange 1112, upper frame body 112, upper inner flange 1121, lower frame body 113, lower inner flange 1131, heat exchange fins 120, heat exchange pipe 130, straight pipe 131, connecting pipe 132, spoiler spring 140;

[0024] Housing 200, opening 201;

[0025] Burner 300, fire row single piece 310;

[0026] Gas supply assembly 400, gas supply seat 410, first gas supply cavity 411, second gas supply cavity 412, third gas supply cavity 413, gas supply hole 420, first gas inlet pipe 431, second gas inlet pipe 432, valve body 440;

[0027] Air supply assembly 500;

[0028] Housing 600;

[0029] Fume hood 700. DETAILED DESCRIPTION

[0030] The utility model provides the following description with reference to the accompanying drawings to help fully understand the various embodiments of the utility model as defined by the claims and their equivalents. The description includes various specific details to help understanding, but these details should be regarded as exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the utility model.

[0031] In the description of the present invention, descriptions of orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] It will be understood that when one element (eg, a first element) is “connected” to another element (eg, a second element), the element may be directly connected to the other element or an intervening element (eg, a third element) may be present between the element and the other element.

[0033] The embodiment of the utility model provides a combined structure of a burner and a heat exchanger, such as Figure 1-4 As shown, it includes a heat exchanger 100 and a burner assembly. The heat exchanger 100 is fixed on the top of the burner assembly. The burner assembly includes a sealed shell 200, a burner 300, a gas supply assembly 400 and an air supply assembly 500. The burner 300 is arranged in the shell 200 to generate a flame inside the shell 200. The top of the shell 200 is provided with an opening 201, and the flame can pass through the opening 201. The sealed shell 200 can reduce the heat dissipation to the outside, so that the heat can be more concentrated on the heat exchanger 100. The gas supply assembly 400 is used to supply gas to the burner 300, and the air supply assembly 500 is used to transport air into the shell 200 to supply primary and / or secondary air, so that the gas can burn and the burner 300 can generate a flame. The heat exchanger 100 is fixed on the top of the shell 200 and covers the opening 201, so that the flame can pass through the opening 201 to act on the heat exchanger 100. The heat exchanger 100 covers the opening 201 to prevent the flame from leaking out, so as to reduce heat loss. The heat exchanger 100 includes an outer frame 110, heat exchange fins 120 arranged in the outer frame 110, and a heat exchange pipe 130 fixed on the outer frame 110. The heat exchange pipe 130 includes a plurality of straight pipes 131, and the straight pipes 131 pass through the heat exchange fins 120. The heat exchange pipe 130 is used to pass water to be heated. The heat of the flame can heat the straight pipes 131 and the heat exchange fins 120, and then perform heat exchange with the water in the heat exchange pipe 130 to heat the water in the heat exchange pipe 130. All the straight pipes 131 are parallel to each other and arranged in a row in the horizontal direction.

[0034] Therefore, the flame generated by the burner 300 of this embodiment only needs to heat the single row of straight tubes 131, which can reduce the requirement for the flame height, thereby reducing the distance between the heat exchanger 100 and the burner 300, reducing the overall height of the combined structure of the burner and the heat exchanger, and effectively saving space. At the same time, the burner assembly adopts a closed shell 200, which reduces the heat transfer to the outside, and the reduction of the flame height also reduces the heat absorbed by the shell 200, thereby reducing heat loss and helping to increase the heating speed.

[0035] In some embodiments, the outer frame 110 includes a main frame 111, an upper frame body 112 and a lower frame body 113, the heat exchange fins 120 can be fixed on the inner side of the main frame 111, the upper frame body 112 is located at the top of the main frame 111 and is sleeved on the outer side of the main frame 111, and the lower frame body 113 is located at the bottom of the main frame 111 and is sleeved on the outer side of the main frame 111. The upper frame body 112 and the lower frame body 113 are respectively used to provide support for the top and bottom of the main frame 111 to strengthen the structural strength of the main frame 111. At the same time, the sizes of the upper frame body 112 and the lower frame body 113 are relatively larger, which is convenient for docking with other components. For example, the lower frame body 113 can be fixedly connected to the top of the shell 200, and the opening 201 at the top of the shell 200 can be located on the inner side of the outer frame 110.

[0036] Furthermore, an upper flange 1111 is provided at the top opening of the main frame 111, and the upper flange 1111 is closely fixed to the top surface of the upper frame 112 to fix the upper frame 112 and limit the movement of the upper frame 112 relative to the main frame 111. A lower flange 1112 is provided at the bottom opening of the main frame 111, and the lower flange 1112 is closely fixed to the bottom surface of the lower frame 113 to fix the lower frame 113 and limit the movement of the lower frame 113 relative to the main frame 111.

[0037] In some embodiments, an upper inner flange 1121 extending downward is provided on the inner side of the upper frame 112, and a lower inner flange 1131 extending upward is provided on the inner side of the lower frame 113. Both the upper inner flange 1121 and the lower inner flange 1131 abut against the outer side surface of the main frame 111 to further limit the movement of the upper frame 112 relative to the main frame 111 and the movement of the lower frame 113 relative to the main frame 111. At the same time, the gap between the upper frame 112 and the main frame 111 and the gap between the lower frame 113 and the main frame 111 can be narrowed to reduce heat loss.

[0038] In some embodiments, the straight tubes 131 are evenly distributed along their arrangement direction, and the distances between two adjacent straight tubes 131 are equal, so that the flame can heat the straight tubes 131 relatively evenly, which helps to increase the heating speed of the water in the heat exchange pipe 130 .

[0039] In some embodiments, a spoiler spring 140 is disposed in the straight tube 131 , and the spoiler spring 140 can reduce the water flow velocity so that the water stays in the straight tube 131 longer to absorb more heat and improve the heat exchange efficiency.

[0040] In some embodiments, the heat exchange fins 120 may be parallel to each other and distributed at equal intervals, so that the flame relatively evenly heats the heat exchange fins 120. At the same time, the straight tubes 131 arranged in rows can also improve the welding quality with the heat exchange fins 120 and ensure the heat exchange efficiency.

[0041] In some embodiments, the heat exchange pipe 130 further includes a plurality of connecting pipes 132 . In the water flow direction, the connecting pipes 132 are used to connect two adjacent straight pipes 131 , so that the water in the straight pipes 131 can be continuously heated.

[0042] In some embodiments, Figure 1 and Figure 4 As shown, the burner 300 includes a plurality of fire row monoliths 310, each of which has an air inlet and a fire hole. The air inlet is used for air intake, and the fire hole ejects a mixture of gas and air, which is finally ignited to form a flame. The gas supply assembly 400 includes a gas supply seat 410 and an air inlet pipe arranged on the surface of the housing 200. A gas supply cavity is arranged in the gas supply seat 410. The inner wall of the gas supply cavity is provided with a gas supply hole 420 that penetrates the inner side of the housing 200 and docks with the fire row monolith 310, and the gas inlet pipe is connected to the gas supply cavity. The gas inlet pipe can transport gas to the gas supply cavity, and the gas in the gas supply cavity is then ejected to the fire row monolith 310 through the gas supply hole 420, so as to supply gas to the fire row monolith 310.

[0043] In this embodiment, the air supply hole 420 can be connected to the air inlet hole of the fire bar single piece 310, and a preset distance can be reserved between the air supply hole 420 and the air inlet hole of the fire bar single piece 310, so that the air in the shell 200 can enter the fire bar single piece 310 together with the gas under the action of the airflow.

[0044] Furthermore, the gas supply assembly 400 further includes a valve body 440, the gas supply cavity includes a first gas supply cavity 411, a second gas supply cavity 412 and a third gas supply cavity 413 which are independent of each other, and the gas inlet pipe includes a first gas inlet pipe 431 and a second gas inlet pipe 432. The first gas inlet pipe 431 is in communication with the first gas supply cavity 411, and the second gas inlet pipe 432 is in communication with the second gas supply cavity 412. The valve body 440 is used to control whether the first gas supply cavity 411 and the third gas supply cavity 413 are in communication or disconnected. When the valve body 440 controls the first gas supply cavity 411 and the third gas supply cavity 413 to be in communication, the gas in the first gas supply cavity 411 can also flow to the third gas supply cavity 413. When the valve body 440 controls the first gas supply cavity 411 and the third gas supply cavity 413 to be disconnected, the gas in the first gas supply cavity 411 does not flow to the third gas supply cavity 413. The first air supply cavity 411, the second air supply cavity 412 and the third air supply cavity 413 are all provided with the above-mentioned air supply holes 420 on their inner walls. The number of air supply holes 420 on the inner wall of the first air supply cavity 411 is less than the number of air supply holes 420 on the inner wall of the second air supply cavity 412, and the number of air supply holes 420 on the inner wall of the second air supply cavity 412 is less than the number of air supply holes 420 on the inner wall of the third air supply cavity 413.

[0045] When the first air inlet pipe 431 is supplied with gas and the valve body 440 is closed, the gas supply holes 420 on the inner wall of the first gas supply cavity 411 deliver gas to the corresponding fire bar 310, and the entire burner 300 works at the first gear position;

[0046] When the second air inlet pipe 432 is supplied with gas, the gas supply holes 420 on the inner wall of the second gas supply cavity 412 deliver gas to the corresponding fire bar 310, and the entire burner 300 works at the second gear. Since the number of the gas supply holes 420 on the inner wall of the first gas supply cavity 411 is less than the number of the gas supply holes 420 on the inner wall of the second gas supply cavity 412, the heat load of the entire burner 300 is greater than the first gear at this time.

[0047] When gas is introduced into the first gas inlet pipe 431 and the valve body 440 is opened, gas is introduced into both the first gas supply cavity 411 and the third gas supply cavity 413, and the gas supply holes 420 on the inner wall of the first gas supply cavity 411 and the gas supply holes 420 on the inner wall of the third gas supply cavity 413 both deliver gas to their corresponding fire bar single piece 310, and the entire burner 300 works in the third gear. Since the number of gas supply holes 420 on the inner wall of the second gas supply cavity 412 is less than the number of gas supply holes 420 on the inner wall of the third gas supply cavity 413, at this time, the heat load of the entire burner 300 is greater than the second gear;

[0048] When gas is introduced into the first air inlet pipe 431 and the second air inlet pipe 432 and the valve body 440 is opened, gas is introduced into the first air supply cavity 411, the second air supply cavity 412 and the third air supply cavity 413, and the gas supply holes 420 on the inner wall of the first air supply cavity 411, the gas supply holes 420 on the inner wall of the second air supply cavity 412 and the gas supply holes 420 on the inner wall of the third air supply cavity 413 all transport gas to their corresponding fire bar single piece 310, and the entire burner 300 operates in the fourth gear, and the heat load of the entire burner 300 is greater than the third gear.

[0049] Therefore, this embodiment can realize the segmented control of the burner, can realize multiple gears, provide multiple choices for users, and improve the user experience. Among them, whether the first air inlet pipe 431 and the second air inlet pipe 432 are passed through the relevant valve body can be controlled, and the valve body 440 can be a solenoid valve.

[0050] In some embodiments, the air supply assembly 500 includes a blower fixed to the housing 200 , and the blower is used to deliver air to a portion of the housing 200 below the burner 300 to supplement the burner 300 with primary and / or secondary air.

[0051] The embodiment of the utility model provides a gas water heater, such as Figure 5 and Figure 6 As shown, the combined structure of the burner and the heat exchanger includes any of the above embodiments. The specific description of the combined structure of the burner and the heat exchanger can refer to the above embodiments and will not be repeated here. The gas water heater also includes a housing 600, and the combined structure of the burner and the heat exchanger is fixed in the housing 600.

[0052] In some embodiments, the outer shell 600 is also fixed with a smoke hood 700, which is arranged on the top of the heat exchanger 100 to collect smoke generated by combustion. A smoke exhaust pipe is arranged on the top of the smoke hood 700, and the smoke exhaust pipe extends out of the outer shell 600 to discharge the smoke generated by combustion.

[0053] The terms and words used in the above description and claims are not limited to the literal meanings, but are only used by the applicant to enable a clear and consistent understanding of the utility model. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the utility model is provided only for illustration, and not for limiting the utility model as defined by the attached claims and their equivalents.

Claims

1. A combined structure of a burner and a heat exchanger, characterized in that: It includes a heat exchanger and a burner assembly, wherein the burner assembly includes a sealed shell, a burner, a gas supply assembly and an air supply assembly; an opening is provided on the top of the shell, the burner is arranged in the shell, the gas supply assembly is used to supply gas to the burner, and the air supply assembly is used to transport air into the shell; the heat exchanger is fixed on the top of the shell and covers the opening, the heat exchanger includes an outer frame, heat exchange fins arranged in the outer frame and a heat exchange pipe fixed on the outer frame, the heat exchange pipe includes a plurality of straight pipes, the straight pipes pass through the heat exchange fins, and all the straight pipes are parallel to each other and arranged in a row in the horizontal direction.

2. The combined structure of a burner and a heat exchanger according to claim 1, characterized in that: The outer frame comprises a main frame, an upper frame body and a lower frame body, wherein the upper frame body is located at the top of the main frame and sleeved on the outer side of the main frame, and the lower frame body is located at the bottom of the main frame and sleeved on the outer side of the main frame.

3. The combined structure of the burner and the heat exchanger according to claim 2, characterized in that: An upper flange is arranged at the top opening of the main frame, and the upper flange is tightly fixed to the top surface of the upper frame body. A lower flange is arranged at the bottom opening of the main frame, and the lower flange is tightly fixed to the bottom surface of the lower frame body.

4. The combined structure of a burner and a heat exchanger according to claim 2, characterized in that: An upper inner turn-over edge extending downward is arranged on the inner side of the upper frame body, and a lower inner turn-over edge extending upward is arranged on the inner side of the lower frame body. Both the upper inner turn-over edge and the lower inner turn-over edge abut against the outer side surface of the main frame.

5. The combined structure of a burner and a heat exchanger according to claim 1, characterized in that: The straight tubes are evenly distributed along their arrangement direction, and the intervals between two adjacent straight tubes are equal.

6. The combined structure of a burner and a heat exchanger according to claim 1, characterized in that: A spoiler spring is arranged in the straight pipe.

7. The combined structure of a burner and a heat exchanger according to any one of claims 1 to 6, characterized in that: The burner includes a plurality of fire row monoliths, and the gas supply assembly includes a gas supply seat and an air inlet pipe arranged on the surface of the shell, a gas supply cavity is arranged in the gas supply seat, and the inner wall of the gas supply cavity is provided with gas supply holes that penetrate to the inner side surface of the shell and connect with the fire row monoliths, and the air inlet pipe is connected to the gas supply cavity.

8. The combined structure of a burner and a heat exchanger according to claim 7, characterized in that: The gas supply assembly also includes a valve body, the gas supply cavity includes a first gas supply cavity, a second gas supply cavity and a third gas supply cavity which are independent of each other, the gas inlet pipe includes a first gas inlet pipe and a second gas inlet pipe; the first gas inlet pipe is connected to the first gas supply cavity, and the second gas inlet pipe is connected to the second gas supply cavity, the valve body is used to control the connection or isolation between the first gas supply cavity and the third gas supply cavity, the number of gas supply holes on the inner wall of the first gas supply cavity is smaller than the number of gas supply holes on the inner wall of the second gas supply cavity, and the number of gas supply holes on the inner wall of the second gas supply cavity is smaller than the number of gas supply holes on the inner wall of the third gas supply cavity.

9. The combined structure of a burner and a heat exchanger according to any one of claims 1 to 6, characterized in that: The air supply assembly comprises a blower fixed on the housing, and the blower is used for delivering air to a part of the housing below the burner.

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

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