Condensing heat exchanger and water heater

Abstract

The utility model relates to the technical field of water heaters, and provides a condensing heat exchanger and a water heater, and the condensing heat exchanger comprises a condensing coil, an outer cylinder and an inner cylinder. Wherein the condensing coil pipe comprises a first coil pipe and a second coil pipe which are connected with each other; the outer cylinder is provided with a containing cavity. The inner cylinder is arranged in the accommodating cavity and divides the accommodating cavity into a first accommodating cavity and a second accommodating cavity; a smoke inlet is formed in the side wall of the outer cylinder; a smoke outlet is formed in the top end of the outer cylinder; the first coil pipe is orderly wound outside the inner cylinder and is arranged in the first accommodating cavity, and the second coil pipe is orderly wound in the second accommodating cavity. According to the condensing heat exchanger, the first coil pipe is wound around the first containing cavity in order, the second coil pipe is wound around the second containing cavity in order, smoke enters from the smoke inlet to exchange heat with the first coil pipe, and part of the smoke enters the second containing cavity to exchange heat with the second coil pipe; smoke can be guided, vortexes are not prone to being generated, the impact strength of smoke flow can be weakened, and therefore noise is reduced. Part of smoke can exchange heat with the second coil pipe, the contact area is increased, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, and particularly relates to a condensing heat exchanger and a water heater. Background Art

[0002] A water heater is a device specifically used for supplying hot water. Its main function is to heat the pipeline through which water flows to provide the hot water required for daily household bathing or washing, etc. A gas water heater refers to a gas appliance that uses gas as fuel and transfers heat to the cold water flowing through the heat exchanger by means of combustion heating to achieve the purpose of preparing hot water.

[0003] A water heater is usually provided with a condensing heat exchanger. Cold water is introduced into the condensing coil in the condensing heat exchanger, and heat exchange is carried out between the cold water and the hot gas to realize the heating of the cold water.

[0004] However, in the related water heater technology, the heated flue gas enters the cavity and exchanges heat with the surface of part of the condensing coil, and finally discharges from the top exhaust port. The condensing coil arranged in the cavity of the condensing heat exchanger is disorderly coiled, which is easy to generate eddy currents and excite noise. Moreover, only a small amount of flue gas flows through part of the condensing coil, resulting in a reduction in the effective heat exchange area and low heat exchange efficiency. Summary of the Utility Model

[0005] Aiming at the above-mentioned defects of the prior art, the utility model provides a condensing heat exchanger to solve at least one of the above-mentioned technical defects in the prior art, so that the water heater has lower noise and higher heat exchange efficiency.

[0006] The utility model also provides a water heater.

[0007] In order to achieve the purpose of the utility model, a condensing heat exchanger provided by the utility model includes:

[0008] A condensing coil, including a first coil and a second coil connected to each other;

[0009] An outer cylinder, provided with a receiving cavity;

[0010] An inner cylinder, arranged in the receiving cavity, dividing the receiving cavity into a first receiving cavity and a second receiving cavity;

[0011] A smoke inlet is provided on the side wall of the outer cylinder, and a smoke exhaust port is provided at the top end of the outer cylinder;

[0012] The first coil is orderly coiled outside the inner cylinder and placed in the first receiving cavity, and the second coil is orderly coiled in the second receiving cavity.

[0013] Preferably, it further includes a water receiving tray, and the water receiving tray is arranged at the bottom end of the outer cylinder.

[0014] Preferably, a water outlet is provided on the water receiving tray.

[0015] Preferably, a first interface and a second interface are provided on the water receiving tray.

[0016] The first interface is connected to the end of the first coiled pipe, and the second interface is connected to the end of the second coiled pipe.

[0017] Preferably, the inner cylinder is coaxially arranged with the outer cylinder.

[0018] Preferably, the outer diameter of the smoke inlet near one end of the outer cylinder is larger than the outer diameter of the smoke inlet far from the outer cylinder.

[0019] Preferably, the axial coiling distance of the first coiled pipe at the end of the smoke inlet near the outer cylinder is the largest.

[0020] Preferably, the end of the inner cylinder is arranged corresponding to the smoke outlet.

[0021] The present utility model also provides a water heater, which includes a housing, a burner and a condensation heat exchanger.

[0022] The condensation heat exchanger is arranged at the top inside the housing, and the burner is connected to the condensation heat exchanger.

[0023] Preferably, a smoke exhaust pipe is further included. The first end of the smoke exhaust pipe is connected to the smoke outlet, and the second end of the smoke exhaust pipe is placed in the external environment.

[0024] The beneficial effects of the present utility model are as follows: For the condensation heat exchanger provided by the present utility model, by arranging the inner cylinder in the accommodation cavity of the outer cylinder, a first accommodation cavity and a second accommodation cavity are formed, and the first coiled pipe is orderly coiled in the first accommodation cavity, and the second coiled pipe is orderly coiled in the second accommodation cavity, so that the heated flue gas can enter the first accommodation cavity from the smoke inlet provided on the side wall of the outer cylinder and contact with the first coiled pipe for heat exchange, and part of the flue gas can also enter the second accommodation cavity and contact with the second coiled pipe for heat exchange; Since the first coiled pipe and the second coiled pipe are both orderly coiled in the accommodation cavity, the flue gas can be guided, it is difficult to form a reflux dead zone, it is not easy to generate eddy currents and the intensity of the flue gas flow impact on the condensation coiled pipe and the wall surface of the accommodation cavity can be weakened, thereby reducing noise; In addition, after the flue gas contacts and exchanges heat with the first coiled pipe, part of the flue gas with residual heat can also enter the second accommodation cavity and contact with the second coiled pipe for heat exchange, effectively increasing the contact area between the flue gas and the condensation coiled pipe, thereby improving the heat exchange efficiency.

[0025] Since the water heater provided by the present utility model includes the above-mentioned condensing heat exchanger, it necessarily has all the advantages of the condensing heat exchanger. That is, the flue gas of the water heater can be guided, and it is not easy to generate eddy currents, thereby reducing noise. In addition, after the flue gas exchanges heat with the first coil, part of the flue gas can also enter the second accommodation cavity to exchange heat with the second coil, effectively increasing the contact area between the flue gas and the condensing coil, thereby improving the heat exchange efficiency of the water heater. Brief Description of the Drawings

[0026] The present utility model will become more clearly understood from the following detailed description of the preferred embodiments shown in the drawings. The above and other objects, features, and advantages of the present utility model will become more apparent. The same reference numerals in all the drawings indicate the same parts, and the drawings are not deliberately drawn to scale in actual size, with the emphasis on showing the gist of the present application.

[0027] Figure 1 It is a schematic diagram of the overall structure of the condensing heat exchanger provided by the embodiment of the present utility model;

[0028] Figure 2 It is a side sectional view of the condensing heat exchanger provided by the embodiment of the present utility model;

[0029] Figure 3 For Figure 1 exploded view of the disassembly;

[0030] Figure 4 It is a schematic diagram of the structure of the water heater provided by the embodiment of the present utility model.

[0031] 1. Outer shell; 2. Burner;

[0032] 100. Condensing coil; 110. First coil; 120. Second coil;

[0033] 200. Outer cylinder; 210. Accommodation cavity; 211. First accommodation cavity; 212. Second accommodation cavity; 220. Smoke inlet; 230. Smoke outlet;

[0034] 300. Inner cylinder;

[0035] 400. Water receiving tray; 410. Water outlet; 420. First interface; 430. Second interface. Detailed Embodiments

[0036] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings.

[0037] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element and integrated with it, or there may be an intermediate element at the same time. The terms "mounted", "one end", "the other end" and similar expressions used in this article are only for the purpose of illustration.

[0038] Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as those commonly understood by those skilled in the technical field to which this article belongs. The terms used in the description in this article are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more of the related listed items.

[0039] The following Figures 1 to 4 will describe the embodiments of the present invention in conjunction with

[0040] Refer to Figures 1 to 3 An embodiment of the present invention provides a condensing heat exchanger, which includes a condensing coil 100, an outer cylinder 200 and an inner cylinder 300.

[0041] Among them, the condensing coil 100 includes a first coil 110 and a second coil 120 connected to each other; cold water can enter from the first coil 110 and flow out from the second coil 120, or enter from the second coil 120 and flow out from the first coil 110, so that the cold water can absorb heat to complete heat exchange.

[0042] The outer cylinder 200 is provided with a receiving cavity 210.

[0043] The inner cylinder 300 is arranged in the receiving cavity 210, dividing the receiving cavity 210 into a first receiving cavity 211 and a second receiving cavity 212. That is to say, the annular space formed by the outer cylinder 200 and the inner cylinder 300 can be the first receiving cavity 211.

[0044] A smoke inlet 220 is provided on the side wall of the outer cylinder 200, and a smoke outlet 230 is provided at the top of the outer cylinder 200. The smoke outlet 230 can be connected to the outlet of the water heater fan and the air duct inlet of the swirl condensing chamber to obtain the flue gas at the heating port.

[0045] The first coil 110 is orderly coiled outside the inner cylinder 300 and placed in the first receiving cavity 211, and the second coil 120 is orderly coiled in the second receiving cavity 212. In this embodiment, the orderly coiling may refer to the coil being coiled in a spiral or swirl shape.

[0046] The heated flue gas can enter the first accommodation chamber 211 from the flue gas inlet 220, come into contact with the first coil pipe 110 located in the first accommodation chamber 211, and exchange heat; part of the flue gas can also enter the second accommodation chamber 212, come into contact with the second coil pipe 120 located in the second accommodation chamber 212, and exchange heat again; finally, the flue gas can be discharged from the smoke exhaust port 230.

[0047] It can be understood that for the condensing heat exchanger provided by the embodiment of the present invention, by arranging the inner cylinder 300 in the accommodation chamber 210 of the outer cylinder 200, the first accommodation chamber 211 and the second accommodation chamber 212 are formed, and the first coil pipe 110 is orderly coiled in the first accommodation chamber 211, and the second coil pipe 120 is orderly coiled in the second accommodation chamber 212, so that the heated flue gas can enter the first accommodation chamber 211 from the flue gas inlet 220 provided on the side wall of the outer cylinder 200 and come into contact with the first coil pipe 110 to exchange heat, and part of the flue gas can also enter the second accommodation chamber 212 and come into contact with the second coil pipe 120 to exchange heat; since the first coil pipe 110 and the second coil pipe 120 are both orderly coiled in the accommodation chamber 210, the flue gas can be guided, it is difficult to form a reflux dead zone, it is not easy to generate eddy currents and the intensity of the flue gas flow impact on the condensing coil pipe 100 and the wall surface of the accommodation chamber 210 can be weakened, thereby reducing noise; in addition, after the flue gas exchanges heat with the first coil pipe 110, part of the flue gas with residual heat can also enter the second accommodation chamber 212 and come into contact with the second coil pipe 120 to exchange heat, effectively increasing the contact area between the flue gas and the condensing coil pipe 100, thereby improving the heat exchange efficiency.

[0048] Furthermore, in order to facilitate the sliding of the condensed water on the surface of the condensing coil pipe 100, in some embodiments of the present invention, the condensing heat exchanger further includes a water receiving tray 400, the water receiving tray 400 is arranged at the bottom end of the outer cylinder 200, and the water receiving tray 400 and the outer cylinder 200 can be detachably connected. After the heated flue gas comes into contact with the first coil pipe 110 and the second coil pipe 120, the moisture in the flue gas will liquefy into condensed water, and the condensed water can slide down to the water receiving tray 400. After the condensed water slides down, it can increase the contact area between the flue gas and the condensing coil pipe 100, effectively increasing the heat exchange efficiency, reducing the temperature of the flue gas, and also improving the energy-saving performance.

[0049] Combined Figure 2 and Figure 3 , in addition, in some embodiments of the present invention, a water outlet 410 is further arranged on the water receiving tray 400, and the condensed water sliding on the water receiving tray 400 can be discharged through the water outlet 410, so as to avoid accumulation in the accommodation chamber 210 and affect the heat exchange effect.

[0050] Of course, in some embodiments of the present invention, a first interface 420 and a second interface 430 are further arranged on the water receiving tray 400.

[0051] The first interface 420 is connected to the end of the first coiled pipe 110, and the second interface 430 is connected to the end of the second coiled pipe 120, facilitating the flow of cold water.

[0052] Furthermore, in some embodiments of the present invention, the inner cylinder 300 and the outer cylinder 200 are coaxially arranged, making the layout of the condensation coiled pipe 100 more reasonable, thereby improving the heat exchange efficiency.

[0053] Specifically, the first end of the condensation coiled pipe 100 can enter the first accommodation cavity 211 from the first interface 420, spirally wind upward to the top of the outer cylinder 200 and enter the inner cylinder 300, and spirally wind downward in the inner cylinder 300 back to the second interface 430 at the bottom, connecting the first end of the condensation coiled pipe 100 (i.e., the end of the second coiled pipe 120) to the second interface 430, and connecting the second end of the condensation coiled pipe 100 (i.e., the end of the first coiled pipe 110) to the first interface 420; in this way, the first accommodation cavity 211 and the second accommodation cavity 212 are divided into two spiral channels with parallel connection to reduce the flow resistance and improve the heat exchange efficiency.

[0054] In some embodiments of the present invention, the outer diameter of the smoke inlet 220 near one end of the outer cylinder 200 is larger than the outer diameter of the smoke inlet 220 far from the outer cylinder 200. When the flue gas enters the accommodation cavity 210 from the smoke inlet 220, it can quickly diffuse to the condensation coiled pipe 100, avoiding heat loss, and thus better improving the heat exchange effect.

[0055] In some embodiments of the present invention, the axial coiling distance of the first coiled pipe 110 near the end of the smoke inlet 220 close to the outer cylinder 200 is the largest. Part of the flue gas can flow towards the top of the outer cylinder 200, and the other part of the flue gas can flow towards the bottom of the outer cylinder 200, enabling this other part of the flue gas to enter the second accommodation cavity 212 from the bottom to contact and exchange heat with the second coiled pipe 120, increasing the contact area between the flue gas and the condensation coiled pipe 100, and thus improving the heat exchange efficiency.

[0056] In some embodiments of the present invention, the end of the inner cylinder 300 (i.e., at the top of the inner cylinder 300) is correspondingly arranged opposite to the smoke exhaust port 230, enabling the flue gas that has undergone heat exchange with the second coiled pipe 120 to be quickly exhausted, and the flue gas entering from the smoke inlet 220 can also enter the accommodation cavity 210 faster, thereby improving the heat exchange efficiency. Specifically, the inner diameter of the inner cylinder 300 can be the same as the inner diameter of the smoke exhaust port 230.

[0057] Combined Figure 4 , the embodiments of the present invention also provide a water heater, which includes a housing 1, a burner 2, and the condensation heat exchanger provided in the above embodiments.

[0058] Among them, the condensation heat exchanger is arranged at the top inside the housing 1, that is, the outer cylinder 200 can be fixed on the housing 1, and the burner 2 is connected to the condensation heat exchanger. The flue gas heated by the burner 2 can rise and enter the condensation heat exchanger to avoid heat dissipation, thereby further improving the heat exchange efficiency.

[0059] For the water heater provided in this embodiment, since it includes the above-mentioned condensation heat exchanger, it necessarily has all the advantages of this condensation heat exchanger. That is, the flue gas of this water heater can be guided, and it is not easy to generate eddy currents, thereby reducing noise; in addition, after the flue gas contacts and exchanges heat with the first coil 110, part of the flue gas can also enter the second accommodation cavity 212 to contact and exchange heat with the second coil 120, effectively increasing the contact area between the flue gas and the condensation coil 100, thereby improving the heat exchange efficiency of this water heater.

[0060] Furthermore, in order to prevent the flue gas discharged from the condensation heat exchanger from affecting the indoor environmental conditions and avoid safety accidents such as carbon monoxide poisoning, thereby improving the safety of the water heater, in some embodiments of the present utility model, this water heater further includes an exhaust pipe, the first end of the exhaust pipe is connected to the exhaust port 230, and the second end of the exhaust pipe is arranged in the external environment.

[0061] In this specification, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0062] In the description of this specification, the description with reference to terms such as "preferred embodiment", "another embodiment", "some embodiments", "other embodiments" or "specific examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0063] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A condensation heat exchanger, characterized in that, Comprising: A condensation coil, including a first coil and a second coil connected to each other; An outer cylinder, provided with a receiving cavity; An inner cylinder, arranged in the receiving cavity, dividing the receiving cavity into a first receiving cavity and a second receiving cavity; A smoke inlet is provided on the side wall of the outer cylinder, and a smoke outlet is provided at the top of the outer cylinder; The first coil is orderly wound around the outer side of the inner cylinder and placed in the first receiving cavity, and the second coil is orderly wound in the second receiving cavity.

2. The condensing heat exchanger according to claim 1, characterized in that, It further includes a water receiving tray, and the water receiving tray is arranged at the bottom end of the outer cylinder.

3. The condensation heat exchanger according to claim 2, wherein A water outlet is provided on the water receiving tray.

4. The condensing heat exchanger according to claim 2, characterized in that, A first interface and a second interface are provided on the water receiving tray, The first interface is connected to the end of the first coil, and the second interface is connected to the end of the second coil.

5. The condensing heat exchanger according to claim 1, characterized in that, The inner cylinder and the outer cylinder are coaxially arranged.

6. The condensing heat exchanger according to claim 1, wherein, The outer diameter of the smoke inlet at the end close to the outer cylinder is larger than the outer diameter of the smoke inlet at the end far from the outer cylinder.

7. The condensation heat exchanger according to claim 6, wherein The axial winding distance of the first coil at the end of the smoke inlet close to the outer cylinder is the largest.

8. The condensation heat exchanger according to claim 1, wherein, The end of the inner cylinder is correspondingly arranged opposite to the smoke outlet.

9. A water heater, characterized in that, Comprising a housing, a burner and the condensation heat exchanger according to any one of claims 1 to 8, The condensation heat exchanger is arranged at the top inside the housing, and the burner is connected to the condensation heat exchanger.

10. The water heater according to claim 9, characterized in that, It further includes a smoke exhaust pipe, the first end of the smoke exhaust pipe is connected to the smoke outlet, and the second end of the smoke exhaust pipe is placed in the external environment.

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