Spiral-flow type condensation heat exchanger and gas water heater thereof

Abstract

The utility model discloses a spiral-flow type condensation heat exchanger and a gas water heater thereof, which are characterized in that the spiral-flow type condensation heat exchanger comprises a spiral-flow condensation bin, a condensation coil pipe, a smoke exhaust pipe and a gas inlet adapter, the side part of the spiral-flow condensation bin is provided with a smoke inlet, and the gas inlet adapter is arranged on the smoke inlet; the smoke exhaust pipe is arranged in the middle of the rotational flow condensation bin, the condensation coil pipe is spirally arranged around the smoke exhaust pipe, the rotational flow condensation bin is provided with a condensate water outlet, a coil pipe installation inlet and a coil pipe installation outlet, and the two ends of the condensation coil pipe are connected with the coil pipe installation inlet and the coil pipe installation outlet respectively. The utility model has the advantages of good stability, difficult formation of backflow dead zone and vortex, and difficult generation of aerodynamic noise.

Description

Technical Field

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

[0002] The existing condensing heat exchanger cavity is provided with a disorderly coiled condensing coil. After the flue gas enters the cavity from one side, it exchanges heat with part of the coil surface and is finally discharged from the top exhaust port. For example, the Chinese patent publication number is CN117213062A, which discloses a condensing heat exchanger, a condensing heat exchange system, a water heater and a heat exchange control method. The utility model condensing heat exchanger, condensing heat exchange system, water heater and heat exchange control method can improve the thermal efficiency of conventional gas water heaters. It is easy to install, has a low modification cost and does not affect the normal use of gas heating equipment. The utility model condensing heat exchanger includes a body, a heat exchange mechanism, a connecting mechanism and a smoke guide mechanism. The body has a body smoke inlet at the bottom and a body smoke exhaust at the top. The heat exchange mechanism and the smoke guide mechanism are arranged in the body, and the heat exchange mechanism is used to exchange heat for the cold medium circulating inside the body. The connecting mechanism is arranged at the body smoke inlet, and the body smoke inlet is detachably and sealedly connected to the outlet of the smoke exhaust mechanism of the gas heating equipment through the connecting mechanism. The smoke guide mechanism is located between the body smoke inlet and the body smoke exhaust, and is used to change the flow direction of the smoke in the body, extend the convection path of the high-temperature smoke, and improve the heat exchange efficiency. However, the disadvantages of this patent structure are: the contact surface between the smoke guide cavity and the heat conduction coil is very small, so it is necessary to set a cavity outside the smoke guide cavity for heat exchange between the smoke and the heat conduction coil, and the annular space is prone to form a reflux dead zone and vortex, generating aerodynamic noise; the condensate is directly discharged into the sewer, which requires the user to install another drainage pipe, which brings installation difficulties. For this reason, it is necessary to further improve the existing technology. Summary of the invention

[0003] The utility model aims to solve the deficiencies of the prior art and to provide a cyclone condensing heat exchanger which is stable, reliable, easy to install and not prone to generating aerodynamic noise.

[0004] Another object of the utility model is to provide a gas water heater.

[0005] The utility model adopts the following technical solutions to achieve the above-mentioned purpose: a cyclone condensing heat exchanger, characterized in that it includes a cyclone condensation chamber, a condensation coil, a smoke exhaust pipe, and an air intake adapter. A smoke inlet is provided on the side of the cyclone condensation chamber, and the air intake adapter is installed on the smoke inlet.

[0006] The smoke exhaust pipe is arranged in the middle of the cyclone condensation bin, the condensation coil is spirally arranged around the smoke exhaust pipe, the cyclone condensation bin is respectively provided with a condensate outlet, a coil installation inlet and a coil installation outlet, and both ends of the condensation coil are respectively connected to the coil installation inlet and the coil installation outlet.

[0007] As a further explanation of the above scheme, the coil installation inlet is arranged at the bottom of the vortex condensation bin, and the coil installation outlet is arranged at the upper part of the vortex condensation bin. Condensed water enters from the bottom inlet of the condensation coil and flows out from the top outlet into the primary heat exchanger pipeline of the gas water heater.

[0008] Furthermore, the smoke exhaust pipe is provided with an inner smoke exhaust section hidden in the cyclone condensation chamber and an outer smoke exhaust section exposed on the top of the cyclone condensation chamber, and there is a spacing space between the smoke inlet and the condensed water outlet of the inner smoke exhaust section.

[0009] Furthermore, a resistive muffler can be installed at the top exhaust pipe of the cyclone condensation chamber to reduce the low-frequency noise of the exhaust.

[0010] Furthermore, the two sides of the condensing coil are respectively close to the cyclone condensation chamber and the smoke exhaust pipe, so that a spiral downward guide channel is formed between the cyclone condensation chamber and the smoke exhaust pipe, which is conducive to guiding the smoke to the lower part of the cyclone condensation chamber, completing heat exchange in this process, and discharging the cooled smoke from the smoke inlet of the smoke exhaust pipe. Therefore, it is difficult to form a reflux dead zone and vortex, and it is not easy to generate aerodynamic noise.

[0011] Furthermore, the pitch ratio of the condensing coil to the guide channel is between 0.5 and 2, so as to take into account both the air flow resistance and the length of the heat exchange coil.

[0012] Furthermore, the flue gas inlet of the cyclone condensation chamber is provided with an air duct tangent to the side of the cyclone condensation chamber, and the air inlet adapter is sleeved outside the air duct, and the high-temperature flue gas enters the cyclone condensation chamber from the tangential direction.

[0013] The beneficial effects that can be achieved by the utility model by adopting the above technical solution are:

[0014] The utility model adopts a swirl condensation heat exchange structure mainly composed of a swirl condensation bin, a condensation coil, an exhaust pipe, and an air intake adapter, which increases the contact area between the airflow and the heat exchange tube, accelerates the sliding of condensed water on the solid surface, effectively increases the heat exchange efficiency, reduces the exhaust temperature, and can improve the energy-saving index of the gas water heater / wall-mounted boiler; through effective interface rectification, the flow dead zone and eddy current are reduced, the intensity of the airflow impact on the solid wall surface such as the coil is weakened, the aerodynamic noise is reduced, and the device is quieter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the gas water heater of the present utility model.

[0016] Figure 2 Schematic diagram of the structure of a cyclone condensing heat exchanger.

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of a cyclone condensing heat exchanger.

[0018] Figure 4 A top view of a cyclone condensing heat exchanger.

[0019] Figure 5 Schematic diagram of the exploded structure of the cyclone condensing heat exchanger.

[0020] Explanation of the accompanying drawings: 1. water heater body 2, cyclone condensation chamber 2-1, flue gas inlet 2-2, condensed water outlet 2-3, coil installation inlet 2-4, coil installation outlet 3, condensing coil 4, exhaust pipe 4-1, internal exhaust section 4-2, external exhaust section 5, air inlet adapter 6, air duct. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, "at least" means one or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise specified and limited, the terms "assembly", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the utility model, unless otherwise specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "below" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the height of the second feature. A first feature being "above", "below" and "below" a second feature includes that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the second feature.

[0025] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, and cannot be understood as limiting the utility model.

[0026] like Figure 1-Figure 5 As shown, the utility model is a cyclone condensing heat exchanger, which is installed inside the water heater body 1. The structure includes a cyclone condensing chamber 2, a condensing coil 3, a smoke exhaust pipe 4, and an air inlet adapter 5. The side of the cyclone condensing chamber 2 is provided with a smoke inlet 3-1, and the air inlet adapter 5 is installed on the smoke inlet 2-1; the smoke exhaust pipe 4 is arranged in the middle of the cyclone condensing chamber 2, the condensing coil 3 is spirally arranged around the smoke exhaust pipe 4, the cyclone condensing chamber 2 is respectively provided with a condensed water outlet 2-2 and a coil installation inlet 2-3, and a coil installation outlet 2-4, and the two ends of the condensing coil are respectively connected to the coil installation inlet and the coil installation outlet.

[0027] The annular space formed by the swirl condensation bin 3 and the smoke exhaust pipe 4 can only allow the condensation pipe to be installed. The two sides of the condensation coil are respectively close to the swirl condensation bin 3 and the smoke exhaust pipe 4, so that a spiral downward guide channel is formed between the swirl condensation bin 3 and the smoke exhaust pipe 4, and only a small amount of airflow is allowed to leak and flow downward along the wall from the gap of the condensation coil, so as to ensure that the airflow and the condensation pipe have sufficient heat exchange area; it is conducive to guiding the flue gas to the lower part of the swirl condensation bin, completing the heat exchange in this process, and discharging the cooled flue gas from the smoke inlet of the smoke exhaust pipe, so it is difficult to form a reflux dead zone and vortex, and it is not easy to generate aerodynamic noise. The pitch ratio of the condensation disk and the airflow spiral space is preferably between 0.5 and 2, so as to take into account both the airflow resistance and the length of the heat exchange coil. The flue gas inlet 2-1 of the swirl condensation bin 2 is provided with an air duct tangent to the side of the swirl condensation bin, and the air intake adapter is set outside the air duct 6, and the high-temperature flue gas enters the swirl condensation bin from the tangential direction.

[0028] The coil installation inlet 2-3 is arranged at the bottom of the cyclone condensation chamber 2, and the coil installation outlet 2-4 is arranged at the upper part of the cyclone condensation chamber. Condensed water enters from the bottom inlet of the condensation coil and flows out from the top outlet into the primary heat exchanger pipeline of the gas water heater. The smoke exhaust pipe 4 is provided with an inner smoke exhaust section 4-1 hidden in the cyclone condensation chamber and an outer smoke exhaust section 4-2 exposed at the top of the cyclone condensation chamber. There is a space between the smoke inlet of the inner smoke exhaust section and the condensed water outlet. A resistive muffler (not shown in the figure) can be installed at the top smoke exhaust pipe position of the cyclone condensation chamber to reduce the low-frequency noise of the smoke exhaust.

[0029] Compared with the prior art, the exhaust gas of the gas water heater after a heat exchange enters the annular cyclone heat exchange space from the top side (square) air inlet pipe of the cyclone condensing heat exchanger, and flows along the condensing coil to the bottom in a cyclone manner. The condensing coil has a flow-guiding function, so it is difficult for the annular space to form a reflux dead zone and eddy current, and it is not easy to generate aerodynamic noise. The flue gas and water vapor with residual heat can fully exchange heat with the condensing tube, and the water vapor condenses on the coil surface, and is blown by the airflow to flow downward along the coil surface in a spiral and finally enter the bottom and be discharged through the condensed water outlet.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A cyclone condensing heat exchanger, characterized in that: It includes a cyclone condensation chamber, a condensation coil, a smoke exhaust pipe, and an air intake adapter. A smoke inlet is arranged on the side of the cyclone condensation chamber, and the air intake adapter is installed on the smoke inlet. The smoke exhaust pipe is arranged in the middle of the cyclone condensation chamber, the condensation coil is spirally arranged around the smoke exhaust pipe, the cyclone condensation chamber is respectively provided with a condensate outlet, a coil installation inlet, and a coil installation outlet, and both ends of the condensation coil are respectively connected to the coil installation inlet and the coil installation outlet.

2. A cyclone condensing heat exchanger according to claim 1, characterized in that: The coil installation inlet is arranged at the bottom of the cyclone condensation bin, and the coil installation outlet is arranged at the upper part of the cyclone condensation bin, and condensed water enters from the bottom inlet of the condensation coil.

3. The cyclone condensing heat exchanger according to claim 1, characterized in that: The smoke exhaust pipe is provided with an inner smoke exhaust section hidden in the cyclone condensation chamber and an outer smoke exhaust section exposed on the top of the cyclone condensation chamber, and a spacing space is provided between the smoke inlet and the condensed water outlet of the inner smoke exhaust section.

4. The cyclone condensing heat exchanger according to claim 1, characterized in that: The two sides of the condensing coil are respectively close to the cyclone condensation chamber and the smoke exhaust pipe, so that a spiral downward guide channel is formed between the cyclone condensation chamber and the smoke exhaust pipe to guide the smoke to the lower part of the cyclone condensation chamber.

5. The cyclone condensing heat exchanger according to claim 4, characterized in that: The pitch ratio of the condensing coil to the guide channel is between 0.5 and 2.

6. The cyclone condensing heat exchanger according to claim 1, characterized in that: The flue gas inlet of the cyclone condensation chamber is provided with an air duct tangent to the side of the cyclone condensation chamber, and the air inlet adapter is sleeved outside the air duct, and the high-temperature flue gas enters the cyclone condensation chamber from the tangential direction.

7. A gas water heater, characterized in that: It comprises a water heater body, in which a cyclone condensing heat exchanger as claimed in any one of claims 1 to 6 is arranged.

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