A gas water heater with a lower drum air-cooled single-row heat exchanger

Abstract

The present invention discloses a gas water heater with a lower-drum air-cooled single-row heat exchanger, comprising: a burner with a blower installed at the bottom, and a heat exchanger provided with a single row of pipelines; an air duct plate is arranged on the inner wall of the burner, and an air-cooled channel is formed between the air duct plate and the inner wall of the burner. When the blower is started, a wind wall for cooling the side wall of the burner is formed in the air-cooled channel. The present invention realizes the effect of cooling the side wall of the burner through the air-cooled channel, thereby greatly reducing the volume of the gas water heater. Since there is no need to wind water pipes to cool the burner, the overall height of the burner is also reduced, and further, the heat exchanger above the burner is closer to the flame, so that the water flow in the heat exchanger can be heated up faster. Thanks to this, the present invention can adopt a single-row pipeline design to further compress the volume of the gas water heater and further save the floor area of the water heater.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid heaters, and more specifically, to a gas water heater having a lower-drum air-cooled single-row heat exchanger. Background Art

[0002] Currently, the gas water heaters sold on the market are relatively large in volume. The main reason is that in order to prevent the temperature of the burner from being transmitted to the outer shell of the water heater and causing safety accidents, water pipes are usually wound around the outer side wall of the burner (to achieve the cooling of the burner and the preheating of the water in the water pipes), and then the water pipes are led to the heat exchanger for heating. The cold water in the water pipes is used to cool the side wall of the burner. Due to this cooling method, the overall volume of the burner becomes larger. Because multiple turns of water pipes need to be wound, the height of the burner also becomes higher, which further increases the distance between the heat exchanger and the flame. To make up for the problem of slow water temperature rise in the heat exchanger caused by the increased distance, a multi-layer pipe stacking setting method is adopted to increase the water heating time in the heat exchanger, thus further increasing the volume of the water heater. Therefore, how to make the water heater more compact in volume while ensuring sufficient firepower and avoiding safety accidents caused by overheating of the burner outer shell is the technical problem to be solved by the present invention. Therefore, it is necessary to provide a gas water heater having a lower-drum air-cooled single-row heat exchanger to at least partially solve the problems existing in the prior art. Summary of the Invention

[0003] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further detailed in the Detailed Description section. The Summary of the Invention section of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0004] To at least partially solve the above problems, the present invention provides a gas water heater having a lower-drum air-cooled single-row heat exchanger, including: a burner with a blower installed at the bottom, and a heat exchanger provided with a single-row pipeline; an air duct plate is arranged on the inner wall of the burner, and an air-cooled channel is formed between the air duct plate and the inner wall of the burner. When the blower is started, a wind wall for cooling the side wall of the burner is formed in the air-cooled channel.

[0005] Preferably, the burner is composed of a housing provided with the air duct plate and a gas device. The gas device penetrates through the housing and is connected to the gas path assembly for supplying gas to the burner.

[0006] Preferably, a flow dividing plate with several through holes is arranged on the inner wall of the housing. The flow dividing plate divides the housing into upper and lower parts. The part above the flow dividing plate is the mixed gas chamber, and the part below the flow dividing plate is the air chamber. The gas device is located in the mixed gas chamber, is arranged on the flow dividing plate, and is communicated with the air chamber through the flow dividing plate. The air duct plate is located in the mixed gas chamber, and after the air in the air chamber enters the mixed gas chamber through the flow dividing plate, it can enter the air cooling channel.

[0007] Preferably, a guiding plate wrapping the outside of the gas device is arranged on the top of the flow dividing plate. A gap is reserved between the guiding plate and the housing to form an air supply channel. Through holes communicated with the air chamber are arranged on the guiding plate located in the air supply channel. The top of the air supply channel is opposite to the bottom of the air cooling channel.

[0008] Preferably, the heat exchanger includes the single-row pipeline formed by arranging at least four water pipes side by side, and a heat transfer component arranged on the single-row pipeline. The single-row pipeline is located at the opening of the mixed gas chamber.

[0009] Preferably, the heat transfer component is composed of several fins arranged closely. The fins are sleeved on the water pipes arranged side by side of the single-row pipeline.

[0010] Preferably, a converging device is arranged on the top of the air duct plate. The converging device extends from the air duct plate towards the direction of the gas device and is movably connected with the air duct plate through a limiting component.

[0011] Preferably, the converging device is in an arc-shaped plate structure. The side close to the guiding plate is the heat guiding side, and the side close to the air cooling channel is the converging guiding side. Both ends of the converging device are movably connected with both sides of the air duct plate through a limiting component. Both the heat guiding side and the converging guiding side are arc-shaped and bent towards the direction of the guiding plate, and the bending radius of the heat guiding side is smaller than that of the converging guiding side.

[0012] Preferably, a slider is arranged on the heat guiding side, and the bottom of the slider abuts against the top of the air duct plate.

[0013] Preferably, the limiting component comprises a circular card slot provided on the converging device, a first strip-shaped limiting slot arranged on the outer side of the circular card slot along the circumferential direction, and a circular clamping platform provided at the end of the air duct plate. The circular clamping platform is inserted into the circular card slot. There is a second strip-shaped limiting slot arranged on the outer side of the circular clamping platform along the circumferential direction. The length of the first strip-shaped limiting slot is less than that of the second strip-shaped limiting slot. The positions of the first strip-shaped limiting slot and the second strip-shaped limiting slot are opposite, and a limiting slider extending into the second strip-shaped limiting slot is arranged in the first strip-shaped limiting slot.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] Compared with the traditional gas water heater, the present invention realizes the effect of cooling the side wall of the burner through the air-cooling channel. Furthermore, it is not necessary to wind water pipes around the outside of the burner of the present invention for cooling and heat insulation, thus greatly reducing the volume of the gas water heater. Since there is no need to wind water pipes to cool the burner, the overall height of the burner is also reduced. As a result, the heat exchanger above the burner is closer to the flame, so that the water flow in the heat exchanger heats up faster. Thanks to this, the present invention can be different from the multi-layer pipeline heating design of the traditional gas water heater and instead uses a single-row pipeline design to further compress the volume of the gas water heater and further save the floor area of the water heater.

[0016] When the water heater is started, the blower will send air upward from the bottom of the burner. Part of the air is used for mixing with gas for combustion assistance, and the other part of the air enters the cold air channel between the air duct plate and the inner wall of the burner, forming an air wall in the cold air channel. The air wall will carry away the heat in the cold air channel, preventing the heat from being transferred to the side wall of the burner. Therefore, when using this water heater, the problem of getting hot after a long time of use will not occur.

[0017] For the gas water heater with a lower-drum air-cooled single-row heat exchanger described in the present invention, other advantages, objectives and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation to the present invention. In the drawings:

[0019] Figure 1 It is a schematic structural diagram of the gas water heater with a lower-drum air-cooled single-row heat exchanger described in the present invention.

[0020] Figure 2Schematic structural diagram of the burner in the gas water heater with a lower-drum air-cooled single-row heat exchanger according to the present invention.

[0021] Figure 3 Schematic cross-sectional view of the burner in the gas water heater with a lower-drum air-cooled single-row heat exchanger according to the present invention.

[0022] Figure 4 For Figure 2 Schematic diagram of the relative positions of the middle fins (only one is shown) and the single-row pipeline.

[0023] Figure 5 Schematic diagram of the positions of the gathering device under large (A), medium (B), and small (C) fire powers.

[0024] Figure 6 Exploded view of the limiting component in the gathering device (the limiting slider is not shown).

[0025] In the figure: 1 burner, 11 housing, 12 gas device, 2 single-row pipeline, 21 fins, 3 air duct plate, 4 air-cooled channel, 5 shunt plate, 6 guiding plate, 7 air supply channel, 8 gathering device, 81 heat guiding side, 82 gathering guiding side, 83 slider, 84 circular clamping groove, 85 first strip-shaped limiting groove, 86 circular clamping platform, 87 second strip-shaped limiting groove, 100 blower, 200 gas path assembly, 300 smoke exhaust assembly, 400 water path control assembly, 500 heat exchanger. Detailed implementation manners

[0026] The following further elaborates on the present invention in detail in conjunction with the accompanying drawings and embodiments, so that those skilled in the art can implement it with reference to the description in the specification.

[0027] It should be understood that the terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0028] As Figures 1-6 shown, the present invention provides a gas water heater with a lower-drum air-cooled single-row heat exchanger, including: a burner 1 with a blower installed at the bottom, and a heat exchanger provided with a single-row pipeline 2; an air duct plate 3 is arranged on the inner wall of the burner 1, and an air-cooled channel 4 is formed between the air duct plate 3 and the inner wall of the burner 1. When the blower is started, a wind wall for cooling the side wall of the burner 1 is formed in the air-cooled channel 4.

[0029] Working principle and beneficial effects of the above technical solution: Compared with traditional gas water heaters, the present invention uses an air-cooled channel 4 to cool the side wall of the burner 1, so that it is not necessary to wind a water pipe around the outside of the burner 1 of the present invention for cooling and heat insulation, thereby greatly reducing the volume of the gas water heater. Since there is no need to wind a water pipe to cool the burner 1, the overall height of the burner 1 is also reduced, so that the heat exchanger above the burner 1 is closer to the flame, thus making the water flow in the heat exchanger heat up faster. Thanks to this, the present invention can be different from the multi-layer pipeline heating design of traditional gas water heaters and instead use a single-row pipeline 2 design to further compress the volume of the gas water heater and further save the floor area of the water heater.

[0030] When the water heater is started, the blower will send air upward from the bottom of the burner 1. Part of the air is used for mixing with gas for combustion assistance, and the other part of the air enters the cold air channel 4 between the air duct plate 3 and the inner wall of the burner 1 to form an air wall in the cold air channel 4. The air wall will carry away the heat in the cold air channel 4 to prevent the heat from being transferred to the side wall of the burner 1, so that when the present water heater is in use, the problem of getting hot after a long use time will not occur.

[0031] In one embodiment, the burner 1 is composed of a housing 11 provided with the air duct plate 3 and a gas device 12. The gas device 12 passes through the housing 11 and is connected to the gas path assembly for supplying gas to the burner 1.

[0032] The inner wall of the housing 11 is provided with a flow dividing plate 5 having a number of through holes. The flow dividing plate 5 divides the housing 11 into upper and lower parts. The part above the flow dividing plate 5 is a mixing gas chamber, and the part below the flow dividing plate 5 is an air chamber. The gas device 12 is located in the mixing gas chamber. The gas device 12 is arranged on the flow dividing plate 5 and is communicated with the air chamber through the flow dividing plate 5. The air duct plate 3 is located in the mixing gas chamber, and after the air in the air chamber enters the mixing gas chamber through the flow dividing plate 5, it can enter the air-cooled channel 4.

[0033] The top of the flow dividing plate 5 is provided with a guiding plate 6 wrapped around the outside of the gas device 12. There is a gap between the guiding plate 6 and the housing 11 to form an air supply channel 7. The guiding plate 6 located in the air supply channel 7 is provided with through holes communicated with the air chamber, and the top of the air supply channel 7 is opposite to the bottom of the air-cooled channel 4.

[0034] The heat exchanger includes the single-row pipeline 2 composed of at least four water pipes arranged side by side, and a heat transfer component arranged on the single-row pipeline 2. The single-row pipeline 2 is located at the opening of the mixing gas chamber.

[0035] The heat transfer assembly is composed of a plurality of closely arranged fins 21 , and the fins 21 are sleeved on the water pipes arranged side by side in the single-row pipeline 2 .

[0036] Also includes:

[0037] Gas circuit assembly 200, used to control the gas supply and adjust the combustion power;

[0038] A water channel control assembly 400 is connected to the single-row pipeline 2 and is used to control the water flow rate of the incoming water;

[0039] Sensor assembly, used to detect water temperature, gas flow, water flow, and air flow in the gas water heater;

[0040] The central control component is electrically connected to the burner 1, the blower, the gas circuit component, the water circuit component, and the sensor component, and is used for switching the gas water heater, controlling the fire power, and adjusting the water temperature.

[0041] The working principle and beneficial effects of the above technical solution: The present invention is also provided with conventional structural configurations required for gas water heaters, such as the gas circuit component 200, the smoke exhaust component 300, the water circuit control component 400, the sensor component, and the central control component. The specific models, principles, and connection methods are not repeated here.

[0042] When using this water heater, the blower starts to supply air to the shell 11. Part of the air will enter the gas device 12 from the diverter plate 5. Because the gas device 12 is connected to the gas path component, the gas and air are mixed and burned in the gas device 12. The other part of the air will directly enter the air supply channel 7 between the guide plate 6 and the shell 11 from the through hole of the diverter plate 5, and then enter the cold air channel 4 along the air supply channel 7. The air will absorb and take away the heat transferred to the guide plate 6 and the air duct plate 3 by the gas device 12. The cold air will become hot air after passing through the air supply channel 7 and the cold air channel 4. After that, the temperature difference between the hot air and the fins 21 can be reduced when passing through the heat exchanger, thereby avoiding the air that cools the shell 11, but instead cools the fins 21 and causes heat loss. Finally, the hot air flows out from the smoke exhaust component 300.

[0043] The present invention uses a single fin to connect all the water pipes on the single-row pipeline 2 to make heat transfer more uniform, thereby improving heating efficiency and uniformity.

[0044] In one embodiment, a gathering device 8 is provided on the top of the air duct plate 3. The gathering device 8 extends from the air duct plate 3 toward the gas device 12 and is movably connected to the air duct plate 3 through a limiting assembly.

[0045] The converging device 8 is in the shape of an arc plate. The side close to the guiding plate 6 is the heat guiding side 81, and the side close to the air-cooling channel 4 is the converging guiding side 82. Both ends of the converging device 8 are movably connected to both sides of the air duct plate 3 through a limiting component. Both the heat guiding side 81 and the converging guiding side 82 are arc-shaped and bent towards the guiding plate 6, and the bending radius of the heat guiding side 81 is smaller than that of the converging guiding side 82.

[0046] A slider 83 is arranged on the heat guiding side 81, and the bottom of the slider 83 abuts against the top of the air duct plate 3.

[0047] The limiting component is composed of a circular clamping groove 84 arranged on the converging device 8, a first strip-shaped limiting groove 85 arranged outside the circular clamping groove 84 and along the circumference, and a circular clamping platform 86 arranged at the end of the air duct plate 3. The circular clamping platform 86 is inserted into the circular clamping groove 84. A second strip-shaped limiting groove 87 is arranged outside the circular clamping platform 86 and along the circumference. The length of the first strip-shaped limiting groove 85 is smaller than that of the second strip-shaped limiting groove 87. The positions of the first strip-shaped limiting groove 85 and the second strip-shaped limiting groove 87 are opposite, and a limiting slider extending into the second strip-shaped limiting groove 87 is arranged in the first strip-shaped limiting groove 85.

[0048] The working principle and beneficial effects of the above technical solution: Since the present invention adopts the design method of a single-row pipeline 2, how to efficiently utilize the heat generated by the burner 1 is a problem that needs to be considered after solving the problem of overheating of the shell 11 at high temperature.

[0049] There are many ways to improve the heating efficiency. The simplest and most direct way to improve is to increase the combustion firepower or reduce the water flow rate. However, increasing the combustion firepower will result in an increase in gas consumption, thereby increasing the user's gas bill. Reducing the water flow rate will cause problems such as unsmooth water output, sudden cold and hot, and a significant reduction in comfort. Therefore, the present invention additionally provides an implementation manner of the air duct plate 3 to improve the heating efficiency method under the condition that the firepower and water flow rate remain unchanged.

[0050] In this implementation manner, a converging device 8 is installed on the air duct plate 3 to automatically converge heat according to the firepower condition and concentrate on heating the heat exchanger.

[0051] It should be noted that the converging device 8 and the air duct plate 3 can be connected by a shaft connection or by the limiting component described in this embodiment. The implementation manner of the limiting component can be various. The one listed in this embodiment is only one of many implementation manners, and it does not mean that the protection scope of the limiting component in the present invention is limited to the following implementation manner.

[0052] First, the circular card slot 84 and the circular card platform 86 are plugged into each other to form a rotatable rotating axis, so that the gathering device 8 can rotate with the circular card platform 86 as the axis. When plugging in, the circular card platform 86 needs to be pried open outwards for connection. After the connection, a limit will naturally be formed to prevent the gathering device 8 from falling off.

[0053] If a limiting assembly is used for connection, a limiting slider needs to be provided between the first strip-shaped limiting groove 85 and the second strip-shaped limiting groove 87 to limit the turning range of the gathering device 8 .

[0054] A slider 83 is slidably provided on the heat guiding side 81 of the gathering device 8. When the gathering device 8 is flipped, the slider 83 will slide relative to the heat guiding side 81 under the abutment of the top of the air duct plate 3. Therefore, no matter where the gathering device 8 is flipped to, it can be ensured that the air duct plate 3 can smoothly guide the hot air to the heat guiding side 81 through the slider 83, thereby avoiding aerodynamic noise.

[0055] When the burner 1 provides low fire power, the gathering device 8 is in the state of Figure 5 As shown in Figure C, because the flow area of the air supply channel 7 is smaller than the flow area in the gas device 12, the air flow rate in the air supply channel 7 is faster, which will blow the gathering device 8 inward. The hot air generated by the gas device 12 will converge toward the center of the heat exchanger along the inward-turned heat guide side 81, so as to achieve the effect of concentrating heat to heat the heat exchanger.

[0056] When the burner 1 provides medium power, the gathering device 8 is in the state of Figure 5 The position is shown in Figure B.

[0057] When the burner 1 provides high firepower, the gathering device 8 is in the state of Figure 5 At the position shown in Figure A, as the gas flow rate increases, the flow rate of the hot air provided by the combustion of the gas device 12 is much greater than the flow rate of the air in the air supply channel 7, so the gathering device 8 is in an upright state at this time (if a limiting slider is not installed, the gathering device 8 will be slightly turned outward. Although this does not affect the use effect, it will hit the outer shell 11, so a limiting slider is usually installed to limit the gathering device 8). Because the bending radius of the heat guide side 81 is smaller than the bending radius of the gathering guide side 82, when the gathering device 8 remains upright, the air flowing out of the air cooling channel 4 will be guided by the gathering guide side 81 to the outside of the fins 21, thereby preventing the air flowing out of the air cooling channel 4 from contacting the fins 21 under high firepower. Although the temperature difference between the hot air flowing out of the air cooling channel 4 and the fins 21 is not large, in the high firepower mode, it is necessary to minimize the heat loss of the fins 21 to ensure the heating efficiency of the single-row pipeline 2.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0059] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. A gas water heater with a lower drum air-cooled single-row heat exchanger, characterized in that, Comprising: A burner (1) with a blower installed at the bottom, and a heat exchanger provided with a single-row pipeline (2); an air duct plate (3) is arranged on the inner wall of the burner (1), and an air-cooled channel (4) is formed between the air duct plate (3) and the inner wall of the burner (1). When the blower is started, a wind wall for cooling the side wall of the burner (1) is formed in the air-cooled channel (4). The burner (1) is composed of a housing (11) provided with the air duct plate (3) and a gas device (12). The gas device (12) penetrates through the housing (11) and is connected to the gas path assembly for supplying gas to the inside of the burner (1). The inner wall of the housing (11) is provided with a flow dividing plate (5) having a number of through holes. The flow dividing plate (5) divides the housing (11) into upper and lower parts. The part above the flow dividing plate (5) is a mixed gas chamber, and the part below the flow dividing plate (5) is an air chamber. The gas device (12) is located in the mixed gas chamber. The gas device (12) is arranged on the flow dividing plate (5) and communicates with the air chamber through the flow dividing plate (5). The air duct plate (3) is located in the mixed gas chamber, and after the air in the air chamber enters the mixed gas chamber through the flow dividing plate (5), it can enter the air-cooled channel (4). A guiding plate (6) wrapping the outside of the gas device (12) is arranged at the top of the flow dividing plate (5). A gap is reserved between the guiding plate (6) and the housing (11) to form a gas supply channel (7). Through holes communicating with the air chamber are arranged on the guiding plate (6) located in the gas supply channel (7). The top of the gas supply channel (7) is opposite to the bottom of the air-cooled channel (4). A converging device (8) is arranged at the top of the air duct plate (3). The converging device (8) extends from the air duct plate (3) towards the direction of the gas device (12). The converging device (8) is movably connected to the air duct plate (3) through a limiting component, or is axially connected to the air duct plate (3). The converging device (8) is in an arc-shaped plate structure. The side close to the guiding plate (6) is a heat guiding side (81), and the side close to the air-cooled channel (4) is a converging guiding side (82). Both ends of the converging device (8) are movably connected to both sides of the air duct plate (3) through a limiting component. Both the heat guiding side (81) and the converging guiding side (82) are arc-shaped and bent towards the direction of the guiding plate (6), and the bending radius of the heat guiding side (81) is smaller than the bending radius of the converging guiding side (82).

2. The gas water heater with a lower-drum air-cooled single-row heat exchanger according to claim 1, characterized in that, The heat exchanger includes the single-row pipeline (2) composed of at least four water pipes arranged side by side, and a heat transfer component arranged on the single-row pipeline (2). The single-row pipeline (2) is located at the opening of the mixed gas chamber.

3. The gas water heater with a lower drum air-cooled single-row heat exchanger according to claim 2, characterized in that, The heat transfer component is composed of a number of closely arranged fins (21). The fins (21) are sleeved on the water pipes arranged side by side of the single-row pipeline (2).

4. The gas water heater with a lower-drum air-cooled single-row heat exchanger according to claim 1, wherein, A slider (83) is arranged on the heat guiding side (81). The bottom of the slider (83) abuts against the top of the air duct plate (3).

5. The gas water heater with a lower drum air-cooled single-row heat exchanger according to claim 1, characterized in that, The limiting component consists of a circular card slot (84) arranged on the converging device (8), a first strip-shaped limiting groove (85) located outside the circular card slot (84) and arranged circumferentially, a circular clamping platform (86) arranged at the end of the air duct plate (3), the circular clamping platform (86) being inserted into the circular card slot (84), a second strip-shaped limiting groove (87) located outside the circular clamping platform (86) and arranged circumferentially, the length of the first strip-shaped limiting groove (85) being less than the length of the second strip-shaped limiting groove (87), the positions of the first strip-shaped limiting groove (85) and the second strip-shaped limiting groove (87) being opposite, and a limiting slider extending into the second strip-shaped limiting groove (87) being arranged in the first strip-shaped limiting groove (85).

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