Heat exchanger frame and gas water heater

Abstract

The utility model relates to a heat exchanger frame and a gas water heater. Relates to the technical field of water heaters. The device specifically comprises a front side plate, a rear side plate, a left side plate arranged between the front side plate and the rear side plate, and a right side plate arranged between the front side plate and the rear side plate, wherein the front side plate, the left side plate, the rear side plate and the right side plate are sequentially connected to form a frame structure; the coil pipe is wound around the periphery of a frame structure formed by the front side plate, the left side plate, the rear side plate and the right side plate, and heat conduction grooves are formed in the positions, where the coil pipe is wound, of the front side plate and the rear side plate. The heat conduction grooves are formed in the front side plate and the rear side plate, the interior of the frame structure of the front side plate, the interior of the frame structure of the left side plate, the interior of the frame structure of the rear side plate and the interior of the frame structure of the right side plate are communicated with the outside through the heat conduction grooves, and therefore water in the coil pipes can be directly heated through heat dissipated outwards through the heat conduction grooves, and the heat conduction efficiency of the heat exchanger frame is improved; therefore, the heat exchange capacity of the heat exchanger is enhanced, and the heating efficiency of the gas water heater is improved.

Description

Technical Field

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

[0002] Water heaters are an indispensable device in current household life. In terms of the energy used, they can be roughly divided into gas water heaters, electric water heaters and solar water heaters, among which gas water heaters are widely used by the general public.

[0003] As one of the commonly used household appliances, the energy efficiency of gas water heaters is one of the important indicators for users to select when purchasing gas water heaters. The energy efficiency of gas water heaters is often closely related to the internal heat exchanger. How to design a heat exchanger with high heating efficiency is a technical problem that needs to be solved urgently. In addition, improving the heating efficiency of gas water heaters can also save a lot of energy for the country. Utility Model Content

[0004] The purpose of the utility model is to provide a heat exchanger frame and a gas water heater to address the deficiencies of the above-mentioned prior art, which can improve the heat conduction efficiency of the heat exchanger frame, thereby enhancing the heat exchange capacity of the heat exchanger, and further improving the heating efficiency of the gas water heater.

[0005] The utility model proposes a heat exchanger frame, comprising a front side plate, a rear side plate, a left side plate arranged between the front side plate and the rear side plate, and a right side plate arranged between the front side plate and the rear side plate, the front side plate, the left side plate, the rear side plate and the right side plate are sequentially connected to form a frame structure; a coil is coiled around the outer periphery of the frame structure formed by the front side plate, the left side plate, the rear side plate and the right side plate, and the front side plate and the rear side plate are provided with heat conduction grooves at the positions where the coils are coiled.

[0006] Further, the extending direction of the heat-conducting groove on the front side plate and the rear side plate coincides with the winding direction of the coil on the front side plate and the rear side plate.

[0007] Furthermore, the coil is wound multiple times around the periphery of the frame structure formed by the front side plate, the left side plate, the rear side plate and the right side plate, and the heat conduction grooves are multiple and are arranged on the front side plate and the rear side plate.

[0008] Furthermore, a flame holding chamber is provided in the frame structure formed by the front side plate, the left side plate, the rear side plate and the right side plate. The flame holding chamber is used to generate high-temperature flue gas to provide heat for the coil, and the heat conduction groove connects the flame holding chamber with the outside.

[0009] Furthermore, a flame inlet channel is provided at the bottom of the frame structure formed by the front side plate, the left side plate, the rear side plate and the right side plate, and the flame inlet channel connects the bottom of the flame holding cavity with the outside to allow the flame to enter the flame holding cavity.

[0010] Furthermore, a smoke outlet channel is provided on the top of the frame structure formed by the front side plate, the rear side plate, the left side plate and the right side plate, and the smoke outlet channel connects the top of the flame holding chamber with the outside to allow smoke to flow out of the flame holding chamber.

[0011] Furthermore, the diameter of the flame holding chamber gradually decreases from the bottom to the top.

[0012] Furthermore, the front side plate and the rear side plate each include a first connecting plate, a second connecting plate, and a first transition curved surface that smoothly connects the second connecting plate to the first connecting plate; the second connecting plate is arranged above the first connecting plate, and the diameter of the flame-holding cavity formed by sequentially connecting the second connecting plate of the front side plate, the left side plate, the second connecting plate of the rear side plate, and the right side plate is smaller than the diameter of the flame-holding cavity formed by sequentially connecting the first connecting plate of the front side plate, the left side plate, the first connecting plate of the rear side plate, and the right side plate, and the heat conduction groove is arranged on the second connecting plate.

[0013] Furthermore, the front side plate and the rear side plate also include a third connecting plate, and a second transition curved surface that smoothly connects the third connecting plate to the second connecting plate; the third connecting plate is arranged above the second connecting plate, and the diameter of the flame-holding cavity formed by sequentially connecting the third connecting plate of the front side plate, the left side plate, the third connecting plate of the rear side plate and the right side plate is smaller than the diameter of the flame-holding cavity formed by sequentially connecting the second connecting plate of the front side plate, the left side plate, the second connecting plate of the rear side plate and the right side plate.

[0014] The utility model also provides a gas water heater, comprising the above-mentioned heat exchanger frame.

[0015] The utility model provides a heat exchanger frame and a gas water heater with the following gain effects:

[0016] (1) The front and rear panels of the frame are provided with heat conducting grooves, and the heat conducting grooves connect the interior of the frame structure of the front, left, rear and right panels with the outside. Therefore, the heat dissipated to the outside through the heat conducting grooves can directly heat the water in the coil, thereby improving the heat conduction efficiency of the heat exchanger frame, thereby enhancing the heat exchange capacity of the heat exchanger and improving the heating efficiency of the gas water heater;

[0017] (2) The extension direction of the heat conduction grooves of the frame on the front side plate and the rear side plate coincides with the winding direction of the coil on the front side plate and the rear side plate, so that the heat dissipated outward through the heat conduction grooves can heat the water in the coil as much as possible, thereby improving the heat conduction efficiency of the heat exchanger frame;

[0018] (3) The frame is provided with a plurality of heat-conducting grooves at the positions where the coils are coiled on the front side plate and the rear side plate, so that the heat dissipated by the high-temperature flue gas from the plurality of heat-conducting grooves can heat the water in the plurality of coils at the same time, thereby further improving the heat transfer efficiency of the heat exchanger frame, thereby enhancing the heat exchange capacity of the heat exchanger and improving the heating efficiency of the gas water heater;

[0019] (4) The front side plate, the left side plate, the rear side plate and the right side plate of the frame are connected end to end in sequence to form a flame holding cavity in the enclosed frame structure. High-temperature flue gas is generated in the flame holding cavity. The heat conduction groove connects the flame holding cavity with the outside world, so that the heat of the high-temperature flue gas generated in the flame holding cavity can be dissipated to the outside through the heat conduction groove, thereby improving the heat conduction efficiency of the heat exchanger frame, thereby enhancing the heat exchange capacity of the heat exchanger and improving the heating efficiency of the gas water heater;

[0020] (5) The flame inlet channel of the frame is arranged at the bottom of the frame structure formed by the front side plate, the left side plate, the rear side plate and the right side plate, and the smoke outlet channel is arranged at the top of the frame structure, so that the high-temperature smoke generated in the flame holding cavity is fully in contact with the frame structure and the heat absorbing sheet arranged in the frame structure when flowing through the flame holding cavity, thereby enhancing the heat exchange capacity of the heat exchanger and further improving the heating efficiency of the gas water heater;

[0021] (6) As the flame-holding cavity of the frame body extends from the bottom of the frame structure to the top of the frame structure, its diameter gradually decreases, so that the flame is gradually drawn to the middle of the flame-holding cavity through the guidance of the flame-holding cavity. That is, the generated high-temperature flue gas gradually gathers to the middle of the flame-holding cavity from bottom to top, thereby better radiating the heat of the high-temperature flue gas to the heat-absorbing plate at the top of the frame structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the utility model and, together with the description, are used to explain the principle of the utility model. In the accompanying drawings, like reference numerals are used to represent like elements.

[0023] Figure 1 This is a schematic diagram of the structure of a heat exchanger frame and a gas water heater coil wound on the frame according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a heat exchanger frame and a heat absorbing sheet of a gas water heater in the frame according to an embodiment of the utility model;

[0025] Figure 3 The present invention is a schematic structural diagram of a heat exchanger frame and a gas water heater according to an embodiment of the present invention.

[0026] In the figure: 1. front side plate; 11. heat conduction groove; 12. first connecting plate; 13. second connecting plate; 14. first transition curved surface; 15. third connecting plate; 16. second transition curved surface; 2. rear side plate; 3. left side plate; 4. right side plate; 5. flame holding chamber; 6. flame inlet channel; 7. smoke outlet channel; 8. coil; 9. straight pipe; 10. heat absorbing plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] See also Figure 1 to Figure 3 A heat exchanger frame of an embodiment of the utility model includes a front side plate 1, a rear side plate 2, a left side plate 3 arranged between the front side plate 1 and the rear side plate 2, and a right side plate 4 arranged between the front side plate 1 and the rear side plate 2. The front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 are connected in sequence to form a frame structure; the coil 8 is coiled around the outer periphery of the frame structure formed by the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4, and the front side plate 1 and the rear side plate 2 are provided with heat conduction grooves 11 at the position where the coil 8 is coiled.

[0029] The heat exchanger of a conventional gas water heater usually includes a frame, a heat exchange tube and a plurality of heat absorbing sheets 10. The plurality of heat absorbing sheets 10 are arranged in the frame. The heat exchange tube includes a straight tube 9 and a coil 8. One end of the straight tube 9 is connected to the cold water pipeline, and the other end extends into the frame from the outside, and sequentially passes through the plurality of heat absorbing sheets 10 and then extends out of the frame. The coil 8 is coiled around the outer periphery of the frame, and one end of the coil 8 is connected to one end of the straight tube 9 extending out of the frame, and the other end is connected to the hot water pipeline. Based on this structure, the heat exchange principle of the heat exchanger of the gas water heater is as follows: high-temperature flue gas is formed in the frame, and heat is exchanged between the high-temperature flue gas and the heat exchange tube, so that the heat of the high-temperature flue gas heats the cold water passing through the heat exchange tube from the cold water pipeline, thereby outputting hot water at one end of the heat exchange tube connected to the hot water pipeline.

[0030] In the heat exchanger frame, there are usually three paths for high-temperature flue gas to exchange heat with the heat exchange tube:

[0031] First, when the high-temperature flue gas in the frame flows through the heat absorbing sheet 10, it directly contacts the portion of the straight pipe 9 extending into the frame, so that the heat of the high-temperature flue gas directly heats the cold water in the straight pipe 9;

[0032] Second, since one end of the straight pipe 9 extending into the frame sequentially passes through a plurality of heat absorbing sheets 10, when the high-temperature flue gas in the frame flows through the heat absorbing sheets 10, part of the heat is absorbed by the heat absorbing sheets 10, and then the heat absorbing sheets 10 are in direct contact with the outer wall of the straight pipe 9, so that the heat absorbed by the heat absorbing sheets 10 heats the cold water in the straight pipe 9;

[0033] Third, the coil 8 is connected to the straight pipe 9, and the heated water in the straight pipe 9 is first transported to the coil 8. Since the high-temperature flue gas is generated in the frame, the coil 8 is coiled around the outer periphery of the frame. Therefore, after part of the heat of the high-temperature flue gas is absorbed by the frame, the frame is in direct contact with the coil 8, so that the heat absorbed by the frame further heats the water in the coil 8, and then the hot water is output from one end of the coil 8 connected to the hot water pipeline.

[0034] It can be foreseen that improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange tube in any of the paths can enhance the heat exchange capacity of the heat exchanger, thereby improving the heating efficiency of the gas water heater.

[0035] In the third path, the existing heat exchanger frame is usually an integral frame. When the heat absorbed by the frame is used to heat the water in the coil 8, the inner wall of the frame comes into contact with the high-temperature flue gas, absorbs heat, and then conducts it to the outer wall of the frame. The outer wall of the frame then directly contacts the coil 8, so that the heat conducted to the outer wall of the frame heats the water in the coil 8. In this process, the heat conduction efficiency of the overall frame is low, resulting in a large heat loss from the inner wall of the frame to the outer wall of the frame, thereby affecting the heat exchange capacity of the heat exchanger.

[0036] Therefore, in the present application, the heat exchanger frame includes a front side plate 1, a rear side plate 2, a left side plate 3 and a right side plate 4, which are connected end to end in sequence to form a frame structure, wherein high-temperature flue gas is generated inside the frame structure, and the coil 8 is coiled around the periphery of the frame structure. Part of the heat of the high-temperature flue gas generated in the frame structure is absorbed by the inner walls of the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4, and then transferred to the outer walls of the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4, and the outer walls of the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 are in direct contact with the coil 8, so that the heat transferred to the outer walls of the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 heats the water in the coil 8.

[0037] Since in the present application, heat conducting grooves 11 are provided on the front side plate 1 and the rear side plate 2, and the heat conducting grooves 11 connect the interior of the frame structure of the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 with the outside, part of the heat of the high-temperature flue gas generated inside the frame structure can be dissipated to the outside through the heat conducting grooves 11; and since the heat conducting grooves 11 are provided at the position where the coil 8 is coiled around the front side plate 1 and the rear side plate 2, the heat dissipated to the outside through the heat conducting grooves 11 can directly heat the water in the coil 8, thereby improving the heat conduction efficiency of the heat exchanger frame, thereby enhancing the heat exchange capacity of the heat exchanger, and improving the heating efficiency of the gas water heater.

[0038] In this embodiment, the extension direction of the heat-conducting groove 11 on the front side plate 1 and the rear side plate 2 coincides with the winding direction of the coil 8 on the front side plate 1 and the rear side plate 2. Since the coil 8 is wound around the periphery of the frame structure surrounded by the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4, the coil 8 is completely distributed in the length direction of the front side plate 1 and the rear side plate 2. Based on the consideration of improving the heat conduction efficiency of the heat exchanger frame, in theory, the larger the size of the heat-conducting groove 11 set on the front side plate 1 and the rear side plate 2, the better, but if the size of the heat-conducting groove 11 is too large, it will also affect the structural strength of the heat exchanger frame.

[0039] Therefore, in actual implementation, the extending direction of the heat-conducting groove 11 on the front side plate 1 and the rear side plate 2 can be made to coincide with the winding direction of the coil 8 on the front side plate 1 and the rear side plate 2, so that the heat dissipated outward through the heat-conducting groove 11 can heat the water in the coil 8 as much as possible. At the same time, the length of the heat-conducting groove 11 can be made slightly smaller than the winding length of the coil 8 on the front side plate 1 and the rear side plate 2, and when the coil 8 is wound on the front side plate 1 and the rear side plate 2, the heat-conducting groove 11 can be completely covered, thereby ensuring the structural strength of the heat exchanger frame while increasing the size of the heat-conducting groove 11.

[0040] In this embodiment, the coil 8 is wound around the outer periphery of the frame structure formed by the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 for multiple turns, and the heat conduction grooves 11 are multiple and are arranged on the front side plate 1 and the rear side plate 2. In actual implementation, the coil 8 can be wound around the outer periphery of the frame structure formed by the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 for multiple turns, so that the heat conducted to the outer walls of the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 heats the water in the multiple turns of the coil 8 at the same time, thereby enhancing the heat exchange efficiency between the frame and the coil 8.

[0041] On this basis, a plurality of heat conducting grooves 11 can be respectively arranged at the positions where the coil 8 is coiled on the front side plate 1 and the rear side plate 2, so that the heat dissipated by the high-temperature flue gas from the plurality of heat conducting grooves 11 can heat the water in the plurality of coils 8 at the same time, thereby further improving the heat conduction efficiency of the heat exchanger frame, thereby enhancing the heat exchange capacity of the heat exchanger and improving the heating efficiency of the gas water heater.

[0042] In this embodiment, a flame holding cavity 5 is provided in the frame structure formed by the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4. The flame holding cavity 5 is used to generate high-temperature flue gas to provide heat for the coil 8, and the heat conducting groove 11 connects the flame holding cavity 5 with the outside. In this application, the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 are connected end to end in sequence to form a flame holding cavity 5 in the enclosed frame structure. High-temperature flue gas is generated in the flame holding cavity 5, so that heat is provided for heat exchange of the heat exchanger through the high-temperature flue gas.

[0043] The heat conducting groove 11 connects the flame holding chamber 5 with the outside world, so that the heat of the high-temperature flue gas generated in the flame holding chamber 5 can be dissipated outward through the heat conducting groove 11, and directly exchange heat with the coil 8 wound on the front side plate 1 and the rear side plate 2, and heat the water in the coil 8, thereby improving the heat conduction efficiency of the heat exchanger frame, thereby enhancing the heat exchange capacity of the heat exchanger and improving the heating efficiency of the gas water heater.

[0044] In this embodiment, a flame inlet channel 6 is provided at the bottom of the frame structure formed by the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4. The flame inlet channel 6 connects the bottom of the flame holding chamber 5 with the outside world so that the flame can enter the flame holding chamber 5. In this application, since the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 are connected end to end in sequence to form a circle, the bottom of the frame structure formed is in an open state. The opening at the bottom of the frame structure is the flame inlet channel 6, so that the bottom of the flame holding chamber 5 is connected with the outside world through the flame inlet channel 6, so that the flame of the gas water heater can enter the flame holding chamber 5 through the flame inlet channel 6, and then the air in the flame holding chamber 5 is heated by the flame, so that high-temperature flue gas is generated in the flame holding chamber 5 to provide heat for the heat exchange of the heat exchanger.

[0045] In this embodiment, a smoke outlet channel 7 is provided at the top of the frame structure formed by the front side plate 1, the rear side plate 2, the left side plate 3 and the right side plate 4, and the smoke outlet channel 7 connects the top of the flame holding cavity 5 with the outside world, so that smoke can flow out of the flame holding cavity 5. In this application, since the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 are connected end to end in sequence and surround a circle, the top of the frame structure formed is also in an open state, and the top opening of the frame structure is the smoke outlet channel 7, so that the top of the flame holding cavity 5 is connected with the outside world through the smoke outlet channel 7, so that the high-temperature smoke in the flame holding cavity 5 can flow out of the flame holding cavity 5 from the smoke outlet channel 7 after heat exchange with the heat exchanger.

[0046] Since the heat exchange between the high-temperature flue gas and the heat exchanger is carried out inside the frame structure formed by the front side plate 1, the rear side plate 2, the left side plate 3 and the right side plate 4, in the present application, the flame inlet channel 6 is arranged at the bottom of the frame structure, and the flue gas outlet channel 7 is arranged at the top of the frame structure, so that the high-temperature flue gas generated in the flame holding chamber 5 is fully in contact with the frame structure and the heat absorbing plate 10 arranged in the frame structure when flowing through the flame holding chamber 5, thereby enhancing the heat exchange capacity of the heat exchanger and further improving the heating efficiency of the gas water heater.

[0047] In this embodiment, the diameter of the flame holding chamber 5 gradually decreases from the bottom to the top. As mentioned above, in the first and second paths of heat exchange between the high-temperature flue gas and the heat exchange tube, the high-temperature flue gas flows through the heat absorbing sheet 10 provided in the frame, exchanges heat with the straight pipe 9 extending into the frame, and heats the cold water in the straight pipe 9. Usually, the heat absorbing sheet 10 is centrally arranged at the top of the frame. Therefore, in this application, the heat absorbing sheet 10 of the heat exchanger is centrally arranged at the top of the frame structure formed by the front side plate 1, the rear side plate 2, the left side plate 3 and the right side plate 4. After the high-temperature flue gas flows through multiple heat absorbing sheets 10, it flows out from the flue gas outlet channel 7 at the top of the frame structure.

[0048] In the present application, the front side plate 1, the left side plate 3, the rear side plate 2 and the right side plate 4 are connected end to end in sequence to form a flame holding chamber 5 in the enclosed frame structure, and the diameter of the flame holding chamber 5 gradually decreases during the process of extending from the bottom of the frame structure to the top of the frame structure, so that when the flame of the gas water heater enters the flame holding chamber 5 from the flame inlet channel 6 at the bottom of the frame structure, under the guidance of the flame holding chamber 5, the flame gradually converges to the middle of the flame holding chamber 5, that is, the generated high-temperature flue gas gradually converges to the middle of the flame holding chamber 5 from bottom to top, so that the heat of the high-temperature flue gas is better radiated to the heat absorbing sheet 10 located at the top of the frame structure. In this process, the heat loss of the high-temperature flue gas is reduced, thereby enhancing the heat exchange capacity of the heat exchanger, and thus improving the heating efficiency of the gas water heater.

[0049] Specifically, in the present embodiment, the front side plate 1 and the rear side plate 2 both include a first connecting plate 12 and a second connecting plate 13 , and the second connecting plate 13 is disposed above the first connecting plate 12 . A first transition curved surface 14 is provided at the connection between the second connecting plate 13 and the first connecting plate 12, and the first transition curved surface 14 smoothly connects the second connecting plate 13 and the first connecting plate 12, so that the diameter of the flame holding chamber 5 formed by the second connecting plate 13 of the front side plate 1, the left side plate 3, the second connecting plate 13 of the rear side plate 2 and the right side plate 4 in sequence is smaller than the diameter of the flame holding chamber 5 formed by the first connecting plate 12 of the front side plate 1, the left side plate 3, the first connecting plate 12 of the rear side plate 2 and the right side plate 4 in sequence, so that the diameter of the flame holding chamber 5 gradually decreases during the process of extending from the bottom of the frame structure to the top of the frame structure, and then when the flame enters the flame holding chamber 5 through the flame inlet channel 6, the flame holding chamber 5 guides the flame so that the flame gradually converges to the middle of the flame holding chamber 5, that is, the high-temperature flue gas generated gradually converges to the middle of the flame holding chamber 5 from bottom to top, so that the heat of the high-temperature flue gas is better radiated to the heat absorbing plate 10 located at the top of the frame structure.

[0050] The heat conducting groove 11 is arranged on the second connecting plate 13. When the coil 8 is coiled around the outer periphery of the frame structure formed by the second connecting plate 13 of the front side plate 1, the left side plate 3, the second connecting plate 13 of the rear side plate 2 and the right side plate 4 which are connected in sequence, the heat conducting groove 11 connects the flame holding chamber 5 in the frame structure with the outside, so that part of the heat of the high-temperature flue gas generated in the flame holding chamber 5 can be dissipated to the outside through the heat conducting groove 11. The heat dissipated to the outside through the heat conducting groove 11 can directly heat the water in the coil 8, thereby improving the heat conduction efficiency of the heat exchanger frame, thereby enhancing the heat exchange capacity of the heat exchanger and improving the heating efficiency of the gas water heater.

[0051] Furthermore, in this embodiment, the front side plate 1 and the rear side plate 2 further include a third connecting plate 15 , and the third connecting plate 15 is disposed above the second connecting plate 13 . A second transition curved surface 16 is provided at the connection between the third connecting plate 15 and the second connecting plate 13, and the second transition curved surface 16 smoothly connects the third connecting plate 15 and the second connecting plate 13, so that the diameter of the flame holding chamber 5 formed by the third connecting plate 15 of the front side plate 1, the left side plate 3, the third connecting plate 15 of the rear side plate 2 and the right side plate 4 connected in sequence is smaller than the diameter of the flame holding chamber 5 formed by the second connecting plate 13 of the front side plate 1, the left side plate 3, the second connecting plate 13 of the rear side plate 2 and the right side plate 4 connected in sequence, so that the diameter of the flame holding chamber 5 continues to shrink during the process of extending from the bottom of the frame structure to the top of the frame structure, and then the flame is guided by the flame holding chamber 5, so that the flame is further gathered toward the middle of the flame holding chamber 5, that is, the high-temperature flue gas generated is further gathered toward the middle of the flame holding chamber 5 from bottom to top, so that the heat of the high-temperature flue gas is better radiated to the heat absorbing plate 10 located at the top of the frame structure.

[0052] This embodiment also provides a gas water heater, including the above-mentioned heat exchanger frame.

[0053] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A heat exchanger frame, characterized in that: The invention comprises a front side plate (1), a rear side plate (2), a left side plate (3) arranged between the front side plate (1) and the rear side plate (2), and a right side plate (4) arranged between the front side plate (1) and the rear side plate (2); the front side plate (1), the left side plate (3), the rear side plate (2) and the right side plate (4) are sequentially connected to form a frame structure; a coil (8) is coiled around the periphery of the frame structure formed by the front side plate (1), the left side plate (3), the rear side plate (2) and the right side plate (4); the front side plate (1) and the rear side plate (2) are provided with heat conduction grooves (11) at the positions where the coil (8) is coiled.

2. A heat exchanger frame as claimed in claim 1, characterized in that: The extension direction of the heat-conducting groove (11) on the front side plate (1) and the rear side plate (2) coincides with the winding direction of the coil (8) on the front side plate (1) and the rear side plate (2).

3. A heat exchanger frame as claimed in claim 2, characterized in that: The coil (8) is wound multiple times around the outer periphery of the frame structure formed by the front side plate (1), the left side plate (3), the rear side plate (2) and the right side plate (4), and the heat conduction grooves (11) are multiple and are arranged on the front side plate (1) and the rear side plate (2).

4. A heat exchanger frame as claimed in claim 1, characterized in that: A flame holding chamber (5) is provided in the frame structure formed by the front side plate (1), the left side plate (3), the rear side plate (2) and the right side plate (4). The flame holding chamber (5) is used to generate high-temperature flue gas to provide heat for the coil (8). The heat conduction groove (11) connects the flame holding chamber (5) with the outside.

5. A heat exchanger frame as claimed in claim 4, characterized in that: A flame inlet channel (6) is provided at the bottom of the frame structure formed by the front side plate (1), the left side plate (3), the rear side plate (2) and the right side plate (4). The flame inlet channel (6) connects the bottom of the flame holding cavity (5) with the outside to allow flame to enter the flame holding cavity (5).

6. A heat exchanger frame as claimed in claim 4, characterized in that: A smoke outlet channel (7) is provided at the top of the frame structure formed by the front side plate (1), the rear side plate (2), the left side plate (3) and the right side plate (4). The smoke outlet channel (7) connects the top of the flame holding chamber (5) with the outside to allow smoke to flow out of the flame holding chamber (5).

7. A heat exchanger frame as claimed in claim 4, characterized in that: The caliber of the flame holding chamber (5) gradually decreases from the bottom to the top.

8. A heat exchanger frame as claimed in claim 7, characterized in that: The front side plate (1) and the rear side plate (2) both comprise a first connecting plate (12), a second connecting plate (13), and a first transition curved surface (14) for smoothly connecting the second connecting plate (13) and the first connecting plate (12); the second connecting plate (13) is arranged above the first connecting plate (12); the diameter of the flame-holding cavity (5) formed by the second connecting plate (13) of the front side plate (1), the left side plate (3), the second connecting plate (13) of the rear side plate (2) and the right side plate (4) connected in sequence is smaller than the diameter of the flame-holding cavity (5) formed by the first connecting plate (12) of the front side plate (1), the left side plate (3), the first connecting plate (12) of the rear side plate (2) and the right side plate (4) connected in sequence; and the heat conduction groove (11) is arranged on the second connecting plate (13).

9. A heat exchanger frame as claimed in claim 8, characterized in that: The front side plate (1) and the rear side plate (2) further include a third connecting plate (15) and a second transition curved surface (16) for smoothly connecting the third connecting plate (15) and the second connecting plate (13); the third connecting plate (15) is arranged above the second connecting plate (13); the diameter of the flame-holding cavity (5) formed by sequentially connecting the third connecting plate (15) of the front side plate (1), the left side plate (3), the third connecting plate (15) of the rear side plate (2) and the right side plate (4) is smaller than the diameter of the flame-holding cavity (5) formed by sequentially connecting the second connecting plate (13) of the front side plate (1), the left side plate (3), the second connecting plate (13) of the rear side plate (2) and the right side plate (4).

10. A gas water heater, characterized in that: It comprises a heat exchanger frame according to any one of claims 1-9.

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