Miniaturized high-energy-efficiency gas water heater

Abstract

The utility model provides a miniaturized high-energy-efficiency gas water heater which comprises a shell, and one side of the shell is open to form a containing cavity used for containing other parts. The combustor is arranged on the lower portion of the containing cavity, one end of a fuel gas inlet pipe communicates with the combustor, and the other end of the fuel gas inlet pipe extends outwards from the lower portion of the combustor; the first heat exchanger is arranged on the combustor in a sleeving manner; the fan is installed above the first heat exchanger and comprises a smoke hood and a motor wind wheel subassembly, an inlet of the smoke hood is fixedly connected with the first heat exchanger and used for collecting smoke of the combustor, and an outlet of the smoke hood is fixedly connected with the motor wind wheel subassembly and used for collecting the smoke of the combustor. The direction of a first smoke outlet of the motor wind wheel subassembly is perpendicular to the direction of an inlet of the smoke hood; a second smoke inlet of the condensation heat exchanger is connected with a first smoke outlet of the motor wind wheel subassembly in a sealed mode, and the condensation heat exchanger is used for conducting secondary heat exchange on smoke.

Description

Technical Field

[0001] This utility model belongs to the field of water heater technology, specifically relating to a miniaturized, high-efficiency gas water heater. Background Technology

[0002] A gas water heater is a type of water heater that uses gas as fuel and transfers heat to cold water flowing through a heat exchanger through combustion, thereby turning cold water into hot water. Its basic principle is that gas burns in the burner, and the high-temperature flame and flue gas produced release a large amount of heat. This heat is transferred to the cold water flowing inside the heat exchanger, realizing heat exchange and raising the temperature of the cold water to become hot water.

[0003] One of the most significant advantages of gas water heaters is their ability to provide hot water quickly. When a user turns on the hot water tap, a gas water heater can heat cold water to the set temperature in a short time. This is because gas water heaters generate heat by burning gas, and the heating speed is much faster than other types of water heaters such as electric water heaters.

[0004] To achieve waste heat recovery from flue gas, current gas water heaters typically employ a two-stage condensing heat exchanger. Existing condensing gas water heaters use a corrugated pipe structure, resulting in a large volume. In addition, the heat exchanger, fan, and other components of gas water heaters are also large, leading to a large overall size. This causes installation difficulties for users and makes it difficult to meet their needs for small-volume installation while simultaneously satisfying high energy efficiency requirements. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a compact, energy-efficient, miniaturized gas water heater.

[0006] To solve the above-mentioned technical problems, this utility model provides a miniaturized high-efficiency gas water heater, including...

[0007] The outer casing has one side open to form a receiving cavity for placing other components;

[0008] A burner is disposed in the lower part of the receiving cavity, and one end of the gas inlet pipe is connected to the burner, while the other end extends outward from the lower part of the burner.

[0009] A first heat exchanger is mounted on the burner and is used to heat the water flow through the burner.

[0010] A fan is installed above the first heat exchanger. The fan includes a fume hood and a motor impeller assembly. The inlet of the fume hood is fixedly connected to the first heat exchanger for collecting the flue gas from the burner. The outlet of the fume hood is fixedly connected to the motor impeller assembly. The direction of the first flue gas outlet of the motor impeller assembly is perpendicular to the direction of the inlet of the fume hood.

[0011] A condensing heat exchanger, wherein the second flue gas inlet of the condensing heat exchanger is sealed to the first flue gas outlet of the motor impeller assembly, and is used for secondary heat exchange of flue gas.

[0012] Preferably, the height of the fume hood is 10-40mm.

[0013] Preferably, the impeller of the motor-mounted fan wheel faces the first smoke outlet, and the axis of the impeller is parallel to the first smoke outlet.

[0014] Preferably, the gas water heater further includes a water flow pipe, the inlet and outlet of which are located below the receiving cavity, and the water flow pipe is sequentially connected to the inlet, the condenser heat exchanger, the first heat exchanger, and the outlet.

[0015] Preferably, the condenser heat exchanger is provided with a thin tube heat transfer tube assembly structure, the water flow pipe is connected to the thin tube heat transfer tube assembly, and the thin tube heat transfer tube assembly is perpendicular to the second flue gas inlet and the second flue gas outlet of the condenser heat exchanger.

[0016] Preferably, the second flue outlet of the condensing heat exchanger is located at the upper part of the condensing heat exchanger and extends outward from the receiving cavity. The second flue outlet is connected to the exhaust pipe and is used to discharge the flue gas of the gas water heater.

[0017] Preferably, the first heat exchanger includes a finned structure and heat transfer tubes. The finned structure and the heat transfer tubes are disposed on the upper part of the first heat exchanger. The heat transfer tubes are arranged in a single row and pass through the finned structure in sequence. The first water inlet of the heat transfer tubes is connected to the second water outlet of the condenser heat exchanger. The first water outlet of the heat transfer tubes is connected to the water outlet through the water flow pipe. Part of the water flow pipe is arranged around the outside of the first heat exchanger.

[0018] Preferably, the height of the fin structure is 25-35mm, and the outer diameter of the heat transfer tube is 12-16mm.

[0019] Preferably, the gas water heater further includes a main controller, which is located below the condensing heat exchanger and is used to control the operating conditions of the burner and the fan; the main controller has an L-shaped structure, including a wide portion near the condensing heat exchanger and a narrow portion away from the condensing heat exchanger, and the narrow portion has an installation notch relative to the wide portion.

[0020] Preferably, the narrow portion has a mounting bracket at the end away from the wide portion, and the mounting bracket is used to fix the main controller to the housing.

[0021] Compared to existing technologies, the gas water heater proposed in this solution has at least the following advantages:

[0022] 1. The gas water heater in this design optimizes the structure and layout of the main components. The burner, the first heat exchanger, and the fan are connected vertically in sequence, reducing the residence time of high-temperature flue gas in the burner during gas combustion. Furthermore, the fume hood is directly connected to the first heat exchanger, and the height of the internal space of the fume hood is reduced. While ensuring effective smoke collection, the main components are arranged more compactly, reducing the waste of high-temperature flue gas during transportation and improving heat exchange efficiency.

[0023] 2. The gas water heater in this solution also optimizes the structure of the main controller. The main controller is designed with an irregular shape that is narrow at the bottom and wide at the top. The lower part of the main controller is narrow, which creates an installation notch that can be used to install other components. This makes full use of the space inside the gas water heater, resulting in a more compact structure and further reducing the size of the gas water heater. Attached Figure Description

[0024] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0025] Figure 1 A schematic diagram of the structure of a miniaturized high-efficiency gas water heater provided in an embodiment of this utility model;

[0026] Figure 2 A schematic diagram of the structure of the fan in the miniaturized high-efficiency gas water heater provided in this embodiment of the utility model;

[0027] Figure 3 A schematic diagram of the structure of the condenser heat exchanger of the miniaturized high-efficiency gas water heater provided in the embodiment of this utility model;

[0028] Figure 4A schematic diagram of the structure of the first heat exchanger of the miniaturized high-efficiency gas water heater provided in this embodiment of the utility model;

[0029] Figure 5 A schematic diagram of the main controller of the miniaturized high-efficiency gas water heater provided in this embodiment of the utility model. Detailed Implementation

[0030] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand this utility model and implement it. However, the embodiments are not intended to limit this utility model. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this utility model.

[0031] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0032] Please refer to Figures 1-5 This utility model provides a miniaturized, high-efficiency gas water heater, including...

[0033] The outer casing 1 has one open side to form a cavity for placing other components. Understandably, the open side of the outer casing 1 is the back side during installation, that is, the side adjacent to the wall. During installation, the gas water heater is directly hung on the wall, and the open side of the outer casing 1 is not easy to observe, which does not affect the aesthetics of the whole unit. Moreover, the open back side also facilitates the maintenance of the gas water heater.

[0034] Burner 2 is located in the lower part of the housing cavity. One end of the gas inlet pipe 201 is connected to the burner 2, and the other end extends outward from the lower part of the burner 2. It can be understood that the burner 2 is the key component for generating heat in the gas water heater. It is provided with a gas inlet connected to the gas inlet pipe 201. The gas inlet pipe 201 extends outward from the lower part of the burner 2 out of the outer shell 1 for connecting to the external gas pipeline. The "external" here refers to the extension from the inner part of the housing cavity to the outer part of the outer shell 1.

[0035] The first heat exchanger 3 is mounted on the burner 2 and is used to heat the water flow through the burner 2. It can be understood that the first heat exchanger 3 is mainly responsible for heat exchange. When the burner 2 is burning, the first heat exchanger 3 is directly mounted on the burner 2, which can effectively transfer the heat of the burner 2 to the flowing water, reduce the heat loss of the burner 2, and adopt a structure that surrounds the burner 2, which can further utilize the heat of the burner 2 and improve the heat exchange rate.

[0036] A fan 4 is installed above the first heat exchanger 3. The fan 4 includes a fume hood 401 and a motor impeller assembly 402. The inlet of the fume hood 401 is fixedly connected to the first heat exchanger 3 to collect the flue gas from the burner 2. The outlet of the fume hood 401 is fixedly connected to the motor impeller assembly 402. The first flue gas outlet 403 of the motor impeller assembly 402 is perpendicular to the inlet direction of the fume hood 401. It is understood that the fan 4 can be used to exhaust the exhaust gas generated by combustion outdoors, preventing the exhaust gas from accumulating indoors; it can also draw in the air needed for combustion from outdoors, making the combustion of the burner 2 safer. Exemplarily, in this embodiment, the fan 4 uses an integrated riveted fume hood 401 and motor impeller assembly 402. The inlet of the fume hood 401 is directly connected to the first heat exchanger 3, and the high-temperature flue gas generated by combustion is directly collected on the fume hood 401, making it less likely to leak to the outside of the water heater. Understandably, the direction of the first flue gas outlet 403 of the motor impeller assembly 402 is perpendicular to the inlet direction of the fume hood 401. That is, the high-temperature flue gas gathered in the fume hood 401 enters the fume hood 401 from the inlet and is then transported laterally to the next component. This arrangement reduces the height of the main components in the vertical direction, and other components can be set in adjacent positions to the burner 2, the first heat exchanger 3 and the fan 4, making the structure more compact.

[0037] The condenser heat exchanger 5 has a second flue gas inlet 501 that is sealed to the first flue gas outlet 403 of the motor impeller assembly 402, and is used for secondary heat exchange of the flue gas. It can be understood that the high-temperature flue gas generated by the burner 2 undergoes its first heat exchange in the first heat exchanger 3, transferring most of the heat to the water flow. The cooled flue gas is then transported to the condenser heat exchanger 5. The cold water entering the gas water heater from the external water pipe first flows through the condenser heat exchanger 5 and then through the first heat exchanger 3. The flue gas, having completed its first heat exchange, then undergoes a second heat exchange with the cold water in the condenser heat exchanger 5, preheating the cold water and raising its temperature to form warm water. This configuration allows the warm water to be heated more effectively and quickly when flowing through the first heat exchanger 3, forming hot water.

[0038] Please refer to Figures 1-2 In this embodiment, the height of the fume hood 401 is 10-40mm. It can be understood that the height of the fume hood 401 mentioned here refers to the height of the internal space of the fume hood 401. Figure 2 The height at the "H" in the middle refers to the distance from the first heat exchanger 3 to the motor impeller assembly 402 after the fume hood 401 is connected to the first heat exchanger 3 and the motor impeller assembly 402. This setting can not only meet the requirements of effective smoke collection, but also control the height of the components within a reasonable range, which is conducive to miniaturization design, reduces the residence time of the flue gas, avoids heat storage costs, and improves thermal efficiency.

[0039] Please refer to Figures 1-2 In this embodiment, the impeller of the fan 4 in the motor impeller assembly 402 faces the first smoke outlet 403, and the axis of the impeller of the fan 4 is parallel to the first smoke outlet 403. It can be understood that the parallel arrangement of the axis with the smoke outlet means that the impeller of the fan 4 is directly facing the first smoke outlet 403, so that when the fan 4 is working, it maximizes the direct blowing of high-temperature flue gas towards the first smoke outlet 403, avoiding excessive collisions between the high-temperature flue gas and the inner wall of the pipe, which would create eddies and reduce flue gas transport efficiency.

[0040] Please refer to Figure 1 and Figure 4 In this embodiment, the gas water heater also includes a water flow pipe 6. The inlet 602 and outlet 601 of the water flow pipe 6 are located below the receiving cavity. The water flow pipe 6 sequentially connects the inlet 602, the condensing heat exchanger 5, the first heat exchanger 3, and the outlet 601. Understandably, external cold water enters the gas water heater through the inlet 602, first flowing along the water flow pipe 6 into the condensing heat exchanger 5 for preheating, initially raising the temperature of the cold water to form warm water. The heated warm water then flows to the first heat exchanger 3 for main heating, raising the temperature of the warm water to a preset temperature value. Finally, it flows out of the gas water heater along the water flow pipe 6. This arrangement fully utilizes the high-temperature flue gas. The preheating in the condensing heat exchanger 5 is equivalent to preheating and recovering the high-temperature flue gas, improving the heat exchange efficiency and energy efficiency of the gas water heater.

[0041] Please refer to Figure 1 and Figure 3In this embodiment, a thin tube heat transfer tube assembly structure 502 is provided inside the condensing heat exchanger 5. The water flow pipe 6 is connected to the thin tube heat transfer tube assembly 302. The thin tube heat transfer tube assembly 302 is perpendicularly arranged to the second flue gas inlet 501 and the second flue gas outlet 503 of the condensing heat exchanger 5. Understandably, the thin tube heat transfer tube assembly structure 502 refers to the arrangement of multiple thin tubes in the condensing heat exchanger 5. Cold water entering from the water flow pipe 6 flows simultaneously into the thin tubes, significantly increasing the surface area of ​​the pipes (i.e., the heat exchange area) for the same pipe cross-sectional area, thereby improving heat exchange efficiency. Furthermore, the temperature of the flue gas entering the condensing heat exchanger 5 has already decreased. If a large-diameter pipe is used, it would be impossible to uniformly heat the cold water in the pipe, thus wasting the preheating of the flue gas. The fine heat transfer tubes 302 group are vertically arranged with the second flue gas inlet 501 and the second flue gas outlet 503 of the condenser heat exchanger 5, which can make the flue gas contact the fine tubes more evenly for heat exchange, so as to make full use of the preheating of the flue gas.

[0042] In this embodiment, the second flue gas outlet 503 of the condensing heat exchanger 5 is located at the upper part of the condensing heat exchanger 5 and extends outward from the receiving cavity. The second flue gas outlet 503 is connected to the exhaust pipe and is used to discharge the flue gas from the gas water heater. Understandably, the second flue gas outlet 503 can be connected to an external exhaust pipe, and its extension outward from the receiving cavity facilitates the connection between the gas water heater and the external exhaust pipe.

[0043] Please refer to Figure 1 and Figure 4 In this embodiment, the first heat exchanger 3 includes a finned structure 301 and a heat transfer tube 302. The finned structure 301 and the heat transfer tube 302 are disposed on the upper part of the first heat exchanger 3. The heat transfer tubes 302 are arranged in a single row and pass through the finned structure 301 in sequence. The first water inlet end of the heat transfer tube 302 is connected to the second water outlet end of the condenser heat exchanger 5. The first water outlet end of the heat transfer tube 302 is connected to the water outlet 601 through a water flow pipe 6. Part of the water flow pipe 6 is arranged around the outside of the first heat exchanger 3. Understandably, the preheated warm water from the condenser heat exchanger 5 flows through the heat transfer tubes 302 of the first heat exchanger 3 for deep heating. After the water temperature rises, it spirals around the outside of the first heat exchanger 3 and finally flows to the outlet 601. When the burner 2 is working, the surface of the first heat exchanger 3 also heats up significantly. The heated hot water, flowing around the surface of the first heat exchanger 3 before passing through the outlet 601, maintains the temperature of the hot water. Energy loss is low when the water flows out of the gas water heater, and the outlet temperature is guaranteed, thus improving the energy efficiency of the gas water heater. The heat transfer tubes 302 are arranged in a single row in parallel, with the tubes aligned in a straight line, which reduces the height of the components and makes the structure more compact.

[0044] Furthermore, the height of the fin structure 301 is 25-35mm, and the outer diameter of the heat transfer tube 302 is 12-16mm; preferably, the height of the fin structure 301 can be 25, 28, 30, 32, 35mm, etc., and the outer diameter of the heat transfer tube 302 can be 12, 13, 14, 15, 16mm. This setting can reduce the height of the parts and avoid uneven flue gas temperature, which would cause the flue gas to condense prematurely, thereby improving the life of the heat exchanger and increasing the heat transfer coefficient.

[0045] Please refer to Figure 1 and Figure 5 In this embodiment, the gas water heater also includes a main controller 7, which is located below the condensing heat exchanger 5 and is used to control the operating conditions of the burner 2 and the fan 4. The main controller 7 has an L-shaped structure, including a wide portion 701 near the condensing heat exchanger 5 and a narrow portion 702 away from the condensing heat exchanger 5. The narrow portion 702 forms an installation notch relative to the wide portion 701. It can be understood that the irregularly shaped main controller 7 reduces the volume occupied by the main controller 7, allowing more space to be installed for other components, making the structure of the gas water heater more compact, thereby reducing the overall size of the unit and achieving miniaturization.

[0046] Furthermore, the narrow portion 702 is provided with a mounting bracket 703 at the end away from the wide portion 701. The mounting bracket 703 is used to fix the main controller 7 to the housing 1. This can avoid the main controller 7 occupying too much installation space and facilitates a more reasonable arrangement of other components.

[0047] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A miniaturized, high-efficiency gas water heater, characterized in that, include The outer casing has one side open to form a receiving cavity for placing components; A burner is disposed in the lower part of the receiving cavity, and one end of the gas inlet pipe is connected to the burner, while the other end extends outward from the lower part of the burner. A first heat exchanger is mounted on the burner and is used to heat the water flow through the burner. A fan is installed above the first heat exchanger. The fan includes a fume hood and a motor impeller assembly. The inlet of the fume hood is fixedly connected to the first heat exchanger for collecting the flue gas from the burner. The outlet of the fume hood is fixedly connected to the motor impeller assembly. The direction of the first flue gas outlet of the motor impeller assembly is perpendicular to the direction of the inlet of the fume hood. A condensing heat exchanger, wherein the second flue gas inlet of the condensing heat exchanger is sealed to the first flue gas outlet of the motor impeller assembly, and is used for secondary heat exchange of flue gas.

2. The miniaturized high-efficiency gas water heater as described in claim 1, characterized in that, The height of the fume hood is 10-40mm.

3. The miniaturized high-efficiency gas water heater as described in claim 1, characterized in that, The impeller of the motor-mounted fan unit faces the first smoke outlet, and the axis of the impeller is parallel to the first smoke outlet.

4. The miniaturized high-efficiency gas water heater as described in claim 1, characterized in that, The gas water heater also includes a water flow pipe, the inlet and outlet of which are located below the receiving cavity. The water flow pipe is sequentially connected to the inlet, the condenser heat exchanger, the first heat exchanger, and the outlet.

5. The miniaturized high-efficiency gas water heater as described in claim 4, characterized in that, The condenser heat exchanger is equipped with a thin tube heat transfer tube assembly structure. The water flow pipe is connected to the thin tube heat transfer tube assembly. The thin tube heat transfer tube assembly is perpendicular to the second flue gas inlet and the second flue gas outlet of the condenser heat exchanger.

6. The miniaturized high-efficiency gas water heater as described in claim 5, characterized in that, The second flue outlet of the condensing heat exchanger is located at the upper part of the condensing heat exchanger and extends outward from the receiving cavity. The second flue outlet is connected to the exhaust pipe and is used to discharge the flue gas of the gas water heater.

7. The miniaturized high-efficiency gas water heater as described in claim 4, characterized in that, The first heat exchanger includes a finned structure and heat transfer tubes. The finned structure and the heat transfer tubes are disposed on the upper part of the first heat exchanger. The heat transfer tubes are arranged in a single row and pass through the finned structure in sequence. The first water inlet of the heat transfer tubes is connected to the second water outlet of the condenser heat exchanger. The first water outlet of the heat transfer tubes is connected to the water outlet through the water flow pipe. Part of the water flow pipe is arranged around the outside of the first heat exchanger.

8. The miniaturized high-efficiency gas water heater as described in claim 7, characterized in that, The height of the fin structure is 25-35mm, and the outer diameter of the heat transfer tube is 12-16mm.

9. The miniaturized high-efficiency gas water heater as described in claim 1, characterized in that, The gas water heater also includes a main controller, which is located below the condensing heat exchanger and is used to control the operating conditions of the burner and the fan. The main controller has an L-shaped structure, including a wide part near the condensing heat exchanger and a narrow part away from the condensing heat exchanger, and the narrow part has an installation notch relative to the wide part.

10. The miniaturized high-efficiency gas water heater as described in claim 9, characterized in that, The narrow portion has a mounting bracket at the end away from the wide portion, and the mounting bracket is used to fix the main controller to the housing.

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