Gas water heater

Abstract

The utility model relates to the technical field of household appliances, and discloses a gas water heater which comprises a machine shell, and a fan assembly, a combustor and a heat exchange assembly are arranged in the machine shell. The smoke outlet is used for discharging combustion smoke and is arranged on the machine shell; the cover body is arranged on the machine shell and forms a smoke exhaust cavity communicated with the smoke outlet; the smoke exhaust cavity is provided with a top wall and side walls connected with the edge of the top wall in a surrounding mode. The top wall is positioned above the smoke outlet and is aligned with the smoke outlet; a smoke outlet for discharging smoke is formed in the side wall; the water removal assembly comprises an air blowing opening; the air blowing opening communicates with the smoke discharging cavity and is used for blowing air to the top wall to eliminate condensate water formed on the surface of the top wall. Air flow can be conveyed into the smoke exhaust cavity through the air blowing opening, air is blown to the surface of the top wall, a condensate water layer on the surface of the top wall is damaged, liquid water formed by condensation on the surface of the top wall is evaporated or blown away to other positions of the smoke exhaust cavity to be prevented from being accumulated on the top wall, and condensation water dripping is prevented from being caused, water is accumulated in a flue, and normal emission of smoke is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a gas water heater. Background Art

[0002] When the gas water heater is used as an outdoor unit, the smoke outlet of its smoke collection device is prone to water ingress and dust accumulation. To ensure the normal operation and safety of the equipment, the outdoor models of existing gas water heaters will be equipped with a waterproof and dustproof smoke exhaust hood at the smoke outlet. Existing outdoor gas water heaters usually include a bottom cover and a cover body connected to the bottom cover, and a cavity is formed in the cover body. When in use, the bottom cover is installed at the smoke outlet of the gas water heater, and the smoke outlet extends into the bottom cover and communicates with the cavity of the cover body. The cover body covers the smoke outlet to prevent dust and rain. The smoke generated by the gas water heater enters the smoke exhaust hood through the smoke outlet and is finally discharged outward through the window on the side wall of the cover body, ensuring the normal smoke exhaust of the gas water heater.

[0003] However, existing outdoor gas water heaters have the following defects when in use: since the gas used in gas water heaters is usually natural gas or liquefied petroleum gas (LPG), the flue gas generated by combustion will carry water vapor. During the smoke exhaust process, the water vapor in the smoke will partially contact and adhere to the bottom end of the top wall of the smoke exhaust hood. Under normal circumstances, the water vapor at the bottom end of the top wall of the smoke exhaust hood will be transferred to the side wall of the smoke exhaust hood under the subsequent action of the smoke wind, thereby avoiding the occurrence of water accumulation and dripping; however, when the gas water heater continues to work at high power, due to the lack of subsequent wind action, a lot of water vapor will remain at the bottom end of the top wall of the smoke exhaust hood. After cooling down, the water vapor will condense and aggregate to form liquid water, and then drip into the smoke outlet under the action of its own gravity, causing water accumulation inside the flue, increasing the risk of flue corrosion, affecting the normal discharge of smoke, and causing poor smoke exhaust or backflow. Utility Model Content

[0004] The utility model aims to provide a gas water heater to solve the above technical problems.

[0005] In order to achieve the above objectives, the following technical solutions are provided:

[0006] In the first aspect, the utility model provides a gas water heater, comprising: a casing, the casing having a fan assembly, a burner and a heat exchange assembly built in the casing; a smoke outlet, which is arranged on the casing for exhausting combustion smoke; a cover body, which is arranged on the casing and forms a smoke exhaust cavity connected to the smoke outlet; the smoke exhaust cavity has a top wall and side walls surrounding and connecting the edges of the top wall; the top wall is positioned above the smoke outlet and aligned with the smoke outlet; the side wall is provided with a smoke exhaust port for exhausting smoke; a water removal assembly, which includes an air outlet; the air outlet is connected to the smoke exhaust cavity and is used to blow air toward the top wall to eliminate condensed water formed on the surface of the top wall.

[0007] As an optional solution of the gas water heater provided by the utility model, the water removal component also includes a guide pipe, one end of which is connected to the air outlet, and the other end of which is connected to the output end of the fan assembly.

[0008] As an optional solution of the gas water heater provided by the utility model, the flow guide pipe is connected to a flow guide valve, and the flow guide valve is used to open and close the flow guide pipe.

[0009] As an optional solution for the gas water heater provided by the utility model, the water removal component also includes a main control board and a visual sensor. The main control board is connected to the diversion valve. The input end of the visual sensor is arranged in the smoke exhaust chamber for detecting condensed water on the top wall surface. The output end of the visual sensor is connected to the main control board.

[0010] As an optional solution of the gas water heater provided by the utility model, the flow guide pipe is connected to a heater, and the heater is used to heat the airflow passing through the flow guide pipe when powered on.

[0011] As an optional solution of the gas water heater provided by the utility model, the flow guide pipe has a heat exchange section, the heat exchange section is made of heat conductive material and fits against the heat exchanger of the gas water heater, and the heater is connected to the heat exchange section.

[0012] As an optional solution for the gas water heater provided by the utility model, it also includes a buffer structure, which has a guide surface aligned with the smoke outlet, and the guide surface is connected to the bottom end of the top wall to guide and buffer the smoke discharged from the smoke outlet, and the air outlet is aligned with the bottom end of the guide surface.

[0013] As an optional solution for the gas water heater provided by the utility model, a conical structured flow guide is provided at the bottom end of the top wall, the top end of the conical structure of the flow guide is aligned to point toward the smoke outlet, the side surface of the flow guide extends from the conical top end of the flow guide to the bottom surface of the top wall, and the flow guide surface is formed on the side surface of the flow guide.

[0014] As an optional solution of the gas water heater provided by the utility model, the air blowing port is aligned with the smoke exhaust port, and the top end of the conical structure of the guide body is arranged between the air blowing port and the smoke exhaust port.

[0015] As an optional solution for the gas water heater provided by the utility model, the buffer structure also includes a first guide arc surface, which closes the guide body in a closed loop; the inner end curvature of the first guide arc surface is continuously connected to the top of the guide surface, and the outer end curvature is continuously connected to the bottom end of the top wall.

[0016] As an optional solution for the gas water heater provided by the utility model, the bottom edge of the top wall is surrounded by a second guide arc surface, and the second guide arc surface extends continuously from the bottom edge curvature of the top wall to connect to the top of the side wall.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The air flow can be delivered into the smoke exhaust cavity through the air outlet, and the air can be blown to the top wall surface to destroy the condensed water layer on the top wall surface, and the liquid water formed by condensation on the top wall surface can be evaporated or blown away to other positions of the smoke exhaust cavity to avoid accumulation on the top wall, so as to prevent condensation dripping, resulting in water accumulation inside the flue and affecting the normal discharge of smoke;

[0019] 2. A guide pipe is provided to connect the air outlet and the fan assembly, so that when the gas water heater is working, the fan assembly carried by the gas water heater itself can generate airflow to blow and remove water from the top wall of the smoke exhaust cavity, making full use of the fan assembly of the gas water heater itself without adding additional equipment, thereby reducing manufacturing costs and improving cost-effectiveness;

[0020] 3. Set up a buffer structure and use the guide surface to adjust the smoke flow path of the smoke outlet to buffer the smoke. This can effectively reduce the direct collision between the smoke and the top cover during high-power operation, thereby reducing the smoke exhaust resistance, improving the smoke exhaust efficiency, and preventing water vapor from being retained in the smoke exhaust cavity and condensing and dripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the internal structure of a gas water heater;

[0023] Figure 2 It is an exploded view of a gas water heater;

[0024] Figure 3 is a schematic cross-sectional view of a gas water heater;

[0025] Figure 4 It is a schematic diagram of the structure of the cover.

[0026] In the figure:

[0027] 1. Casing; 2. Fan assembly; 3. Burner; 4. Heat exchange assembly; 5. Gas supply assembly; 6. Smoke outlet; 7. Cover body; 71. Smoke exhaust chamber; 72. Top wall; 73. Side wall; 74. Smoke exhaust outlet; 8. Water removal assembly; 81. Blowing port; 82. Flow guide pipe; 83. Flow guide valve; 84. Main control board; 85. Visual sensor; 86. Heater; 87. Heat exchange section; 9. Buffer structure; 91. Flow guide surface; 92. Flow guide body; 93. First flow guide arc surface; 94. Second flow guide arc surface. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0029] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1:

[0032] refer to Figure 1 to Figure 4A gas water heater includes a casing 1, in which a fan assembly 2, a burner 3, a heat exchange assembly 4 and a gas supply assembly 5 are mainly arranged. When working, the gas supply assembly 5 is connected to the external gas pipeline to transport the gas (natural gas or liquefied petroleum gas LPG) into the burner 3. At the same time, the fan assembly 2 rotates to form a negative pressure to inhale air, providing the burner 3 with oxygen required for combustion. The gas is mixed with the air provided by the fan in the burner 3, and is ignited by the ignition system in the burner 3 to form flame combustion. The high-temperature flue gas generated by the combustion enters the heat exchange assembly 4 under the action of the fan assembly 2, and exchanges heat with the water in the heat exchange assembly 4, thereby achieving the purpose of heating water.

[0033] Specifically, in this embodiment, the gas water heater further comprises a smoke outlet 6 and a cover 7. The smoke outlet 6 is provided on the housing 1 for exhausting combustion smoke. The cover 7 is provided on the housing 1 and forms a smoke exhaust cavity 71 connected to the smoke outlet 6. The smoke exhaust cavity 71 comprises a top wall 72 and a side wall 73. The top wall 72 is positioned above the smoke outlet 6 and aligned with the smoke outlet 6. The side wall 73 surrounds and connects the edge of the top wall 72 and is provided with a smoke exhaust cavity 74 for exhausting smoke. When working, the smoke exhaust end of the gas water heater is connected to the smoke outlet 6, and smoke is initially discharged through the smoke outlet 6. The cover 7 is connected to cover the smoke outlet 6 to play a role in dust and rain protection. The smoke generated by the gas water heater enters the smoke exhaust cavity 71 through the smoke outlet 6 and is finally discharged outward through the smoke exhaust cavity 74 on the side wall 73 to ensure the normal exhaust of the gas water heater.

[0034] The improvement of the present application is that the gas water heater also includes a water removal component 8, and the water removal component 8 includes a blowing port 81, which is arranged on the cover body 7 and communicates with the smoke exhaust cavity 71. When the gas water heater is working at high power, if there is residual water vapor in the smoke exhaust cavity 71, air flow can be delivered into the smoke exhaust cavity 71 through the blowing port 81, and air can be blown to the surface of the top wall 72 to destroy the condensed water layer on the surface of the top wall 72, and the liquid water formed by condensation on the surface of the top wall 72 can be evaporated or blown away to other positions of the smoke exhaust cavity 71 to avoid accumulation on the top wall 72, thereby achieving the purpose of "eliminating the condensed water on the surface of the top wall 72, preventing the condensed water from dripping into the smoke outlet 6 and causing water accumulation inside the flue and affecting the normal discharge of smoke".

[0035] Of course, the specific implementation structure of the technical solution of "the blowing port 81 blows air into the exhaust chamber 71 to eliminate the condensed water on the surface of the top wall 72" is diverse. For example, a blower or fan can be set at the blowing port 81, and the blower and fan can be used as wind sources to generate airflow, and the airflow is blown into the exhaust chamber 71 through the blowing port 81, thereby eliminating the condensed water on the top wall 72. However, this will add extra equipment and increase the manufacturing cost. In this regard, in this embodiment, the water removal component 8 also includes a guide pipe 82, one end of which is connected to the blowing port 81, and the other end of the guide pipe 82 passes through the casing 1 of the gas water heater and is connected to the output end of the fan assembly 2 of the gas water heater, so that when working, the fan assembly 2 carried by the gas water heater itself can generate airflow to blow and remove water from the top wall 72 of the exhaust chamber 71. In this way, the fan assembly 2 of the gas water heater can be fully utilized without adding additional equipment, thereby reducing the manufacturing cost and helping to improve cost-effectiveness.

[0036] In order to improve the flexibility of blowing air from the air outlet to eliminate condensed water on the surface of the top wall 72, in this embodiment, a diversion valve 83 is connected to the diversion pipe 82. When working, the diversion valve 83 is operated to control the opening and closing of the diversion pipe 82. Specifically, when it is necessary to blow air to remove water from the top wall 72 of the smoke exhaust chamber 71, the diversion valve 83 can be opened to connect the diversion pipe 82 to the air outlet 81 and the fan assembly 2 of the gas water heater, so that the airflow generated by the fan assembly 2 can enter the smoke exhaust chamber 71 through the diversion pipe 82; and when the gas water heater is working at low power, the smoke and water vapor can be completely discharged from the smoke exhaust chamber 71 through the smoke outlet 74, or in other cases where it is not necessary to blow air to remove water from the top wall 72, the diversion valve 83 can be closed to block the diversion pipe 82. By adding the diversion valve 83, the user or the gas water heater system can flexibly control the blowing operation of the air outlet 81 according to the actual situation, avoid unnecessary energy waste, and achieve energy saving and environmental protection.

[0037] In order to further improve the accuracy of the blowing operation of the blowing port 81, in this embodiment, the water removal component 8 also includes a main control board 84 and a visual sensor 85. The input end of the visual sensor 85 is arranged in the smoke exhaust cavity 71, and is used to detect the amount of water vapor condensation on the surface of the top wall 72. The output end of the visual sensor 85 is connected to the input end of the main control board 84, and the output end of the main control board 84 is connected to the guide valve 83 and the fan assembly 2 of the gas water heater. When working, the visual sensor 85 detects the condensation of the surface of the top wall 72, and feeds back the detection result to the main control board 84. The main control board 84 controls the opening and closing of the guide valve 83 and / or the closing and starting of the fan assembly 2 according to the feedback result. By introducing the main control board 84 and the visual sensor 85, the blowing operation of the blowing port 81 can be controlled more accurately, the condensation on the surface of the top wall 72 can be eliminated more effectively, the flexibility of the solution is improved, and it is helpful to realize automatic blowing and water removal, reducing the need and cost of manual intervention.

[0038] In addition, in this embodiment, the guide tube 82 is connected to a heater 86. When working, the heater 86 can be powered on to heat the airflow passing through the guide tube 82, increase the temperature of the airflow blown out of the air outlet 81, and help accelerate, effectively evaporate or dry the condensed water on the surface of the top wall 72, and further improve the dewatering effect. Of course, the heater 86 can be connected to the main control board 84, and the main control board 84 controls its heating power and working time to achieve the best dewatering effect.

[0039] Considering that the blowing and water removal by the blowing port 81 is usually carried out after the gas water heater works at high power, in this embodiment, the guide tube 82 has a heat exchange section 87, which is made of heat conductive material and fits against the heat exchange component 4 of the gas water heater, and the heater 86 is connected to the heat exchange section 87. Through the above technical scheme, when the gas water heater is working, the heat exchange section 87 made of heat conductive material can fit against the heat exchange component 4 of the gas water heater to collect the waste heat generated by the operation of the gas water heater. The heat exchange section 87 will heat up after absorbing the waste heat, and can preheat the "electric heating element in the heater 86" and the "subsequent airflow flowing through the guide tube 82", so that the airflow is heated to a higher temperature in a shorter time, thereby improving the efficiency of drying and water removal, and can reduce the energy consumption of the heater 86, thereby achieving energy saving and environmental protection.

[0040] In addition to the reason that "after the gas water heater has been working at high power for a long time, a lot of water vapor will remain at the bottom of the exhaust hood top wall 72 due to the lack of subsequent wind action", another major reason for the condensation dripping at the bottom of the exhaust hood top wall 72 is that the terminal exhaust efficiency of the existing gas water heater is insufficient. Specifically, when the gas water heater works at low power, the exhaust volume and initial flue gas flow rate per unit time are small, and the exhaust resistance encountered by the flue gas after entering the exhaust chamber 71 is small, which will not affect the normal exhaust of the gas water heater; and when the gas water heater works at high power, the exhaust volume and initial flue gas generated per unit time are small. The top wall 72 with a large flow rate and strong smoke exhaust will directly collide with the smoke discharged from the smoke outlet 6, thereby seriously reducing the flow rate of the smoke and easily forming a vortex at the top of the smoke exhaust port 74, thereby affecting subsequent smoke exhaust and reducing the smoothness of smoke exhaust, causing the water vapor carried in the smoke to be retained in the smoke exhaust chamber 71, sharply increasing the air humidity in the smoke exhaust chamber 71, and increasing the possibility of condensation and dripping on the surface of the top wall 72. Especially when the gas water heater is started in a low temperature outdoor environment, due to the low temperature of the top wall 72, the condensation and dripping of the top wall 72 after contacting the water vapor retained in the smoke exhaust chamber 71 will become more serious.

[0041] In this regard, another improvement of the present application is:

[0042] The improvement of the present application is that a buffer structure 9 is provided at the bottom end of the top wall 72, and the buffer structure 9 has a guide surface 91 aligned with the smoke outlet 6, and the guide surface 91 is connected to the bottom end of the top wall 72 to adjust the smoke flow path and guide and buffer the smoke. By providing the buffer structure 9 and using the guide surface 91 to adjust the smoke flow path of the smoke outlet 6 and buffer the smoke, the direct collision between the smoke and the top wall 72 during high-power operation can be effectively reduced, thereby reducing the smoke exhaust resistance, improving the smoke exhaust efficiency, and preventing excessive water vapor from being retained in the smoke exhaust chamber 71. Specifically, in this embodiment, the buffer structure 9 includes a guide body 92 arranged at the bottom of the top wall 72, and the guide body 92 is configured to guide the flow of fluid. The end of the guide body 92 is close to the smoke outlet 6, that is, the top of the guide body 92 points to the smoke outlet 6, and the side of the guide body 92 gradually expands from the end of the guide body 92 close to the smoke outlet 6 and continuously extends to the bottom of the top wall 72, and the above-mentioned guide surface 91 is formed along this side. Through the above-mentioned technical solution, during the smoke exhaust process, the top of the guide body 92 can first bear the impact of the smoke from the smoke outlet 6, and through the structure of the gradual expansion and extension of the side of the guide body 92, the smoke is dispersed and guided, so that the originally concentrated smoke is dispersed to form a more uniform flow field, and flows steadily and smoothly along the side of the guide body 92 to the top wall 72, playing a buffering role, so that the smoke can be discharged more smoothly through the smoke outlet 74 of the side cover, thereby improving the smoke exhaust efficiency.

[0043] Of course, the shapes and formation methods of the guide body 92 and the guide surface 91 are diverse. In addition to the above-mentioned implementation structure, the guide body 92 can also be a hemispherical structure or other shape structures that can play the same guiding role. Correspondingly, the guide surface 91 is also a hemispherical surface or other shapes. In this implementation case, the guide body 92 is specifically designed as a conical structure, and the guide surface 91 is designed as a conical surface formed on the side of the guide body 92. Compared with the above-mentioned hemispherical structure, it has a sharper top and reduces unnecessary curved surfaces and transitions. It can be more directly aligned with the smoke outlet 6, making the flow path of the smoke clearer. Especially when the gas water heater is working at high power, the guide body 92 with a conical structure can better adapt to and adjust the flow rate and direction of the smoke, and while affecting the smoke flow rate to a lesser extent, it can better reduce the formation of vortices and improve the smoothness of smoke exhaust.

[0044] In this embodiment, the blowing port 81 is aligned with the smoke outlet 74, and the top of the conical structure of the guide body 92 is arranged between the blowing port 81 and the smoke outlet 74, so that the blowing port 81 is aligned with the bottom of the guide surface 91. Through the above technical solution, when the blowing port 81 is used to blow air to remove water, since the guide body 92 is arranged between the blowing port 81 and the smoke outlet 74, the airflow generated by the blowing port 81 can quickly blow the condensed water on the guide body 92 out of the smoke exhaust hood through the smoke outlet 74, thereby achieving rapid water removal.

[0045] In order to further enhance the buffering effect of the guide body 92 on the smoke, in this embodiment, the buffer structure 9 also includes a first guide arc surface 93, the first guide arc surface 93 is closed around the guide body 92, the inner end of the first guide arc surface 93 is connected to the top of the guide surface 91 with a downward curvature, and the outer end of the first guide arc surface 93 is connected to the bottom surface of the top wall 72 with an upward curvature. By setting the first guide arc surface 93, the inner and outer ends of the first guide arc surface 93 are connected to the "guide surface 91" and the "bottom surface of the top wall 72" with a continuous curvature, which ensures that the smoke can more smoothly transition from the guide body 92 to the top wall 72 after flowing along the guide surface 91, reducing the smoke flow resistance while reducing the direct collision between the smoke and the top wall 72, ensuring the continuous flow of the smoke.

[0046] Furthermore, in order to make the smoke transition more smoothly from the bottom surface of the top wall 72 to the side wall 73, in this embodiment, the bottom edge of the top wall 72 is surrounded by a second guide arc surface 94, and the second guide arc surface 94 extends continuously from the bottom edge curvature of the top wall 72 to connect to the top of the side wall 73. During operation, the smoke flowing through the top wall 72 can smoothly transition to the side wall 73 along the second guide arc surface 94, instead of directly hitting the side wall 73, reducing the flow resistance of the smoke and the possibility of vortex formation, thereby improving the smoothness and efficiency of smoke exhaust.

[0047] Of course, the formation implementation structure of the flow guide 92 is diverse. In this implementation case, the flow guide 92 is formed as an integral part by a downward depression at the bottom of the top wall 72. The one-piece molding design can not only simplify the smoke exhaust structure, but also reduce the interface between the flow guide 92 and the top wall 72, which is conducive to obtaining a smoother and smoother smoke flow path, thereby improving the buffering and diversion effect of the flow guide 92.

[0048] In addition, in order to improve the versatility of the buffer structure 9, this embodiment provides another implementation structure for forming the flow guide 92: the flow guide 92 can be detachably connected to the bottom end of the top wall 72 by bolts, buckles, slots, bonding, etc., and the first flow guide arc surface 93 is integrally formed at the bottom end of the side of the flow guide 92 and abuts against the bottom surface of the top wall 72. By detachably connecting the flow guide 92 to the top wall 72, the actual production process allows the manufacturer to assemble flow guides 92 of different specifications according to parameters such as product smoke exhaust power without changing the size structure of the cover body 7, thereby improving the versatility of the buffer structure 9.

[0049] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A gas water heater, characterized in that: include: A casing (1), wherein the casing (1) has a fan assembly (2), a burner (3) and a heat exchange assembly (4) built therein; A smoke outlet (6) for exhausting combustion smoke is arranged on the housing (1); A cover body (7) is arranged on the housing (1) and is formed with a smoke exhaust cavity (71) connected to the smoke outlet (6); The smoke exhaust cavity (71) comprises a top wall (72) and a side wall (73) surrounding and connecting the edge of the top wall (72); The top wall (72) is positioned above the smoke outlet (6) and aligned with the smoke outlet (6); The side wall (73) is provided with a smoke exhaust port (74) for exhausting smoke; A water removal component (8) comprises an air blowing port (81); the air blowing port (81) is connected to the smoke exhaust cavity (71) and is used to blow air toward the top wall (72) to remove condensed water formed on the surface of the top wall (72).

2. The gas water heater according to claim 1, characterized in that: The dewatering component (8) further comprises a guide pipe (82), one end of which is connected to the air outlet (81), and the other end of which is connected to the output end of the fan component (2).

3. The gas water heater according to claim 2, characterized in that: The flow guide pipe (82) is connected to a flow guide valve (83), and the flow guide valve (83) is used to open and close the flow guide pipe (82).

4. The gas water heater according to claim 3, characterized in that: The dewatering component (8) further comprises a main control board (84) and a visual sensor (85); the main control board (84) is connected to the diversion valve (83); an input end of the visual sensor (85) is arranged in the smoke exhaust chamber (71) for detecting condensed water on the surface of the top wall (72); and an output end of the visual sensor (85) is connected to the main control board (84).

5. The gas water heater according to claim 2, characterized in that: The flow guide tube (82) is connected to a heater (86), and the heater (86) is used to heat the airflow passing through the flow guide tube (82) by energizing.

6. The gas water heater according to claim 5, characterized in that: The flow guide pipe (82) has a heat exchange section (87), the heat exchange section (87) is made of a heat-conducting material and is in close contact with the heat exchange component (4), and the heater (86) is connected to the heat exchange section (87).

7. The gas water heater according to any one of claims 1 to 6, characterized in that: It also comprises a buffer structure (9), the buffer structure (9) having a guide surface (91) aligned with the smoke outlet (6), the guide surface (91) being connected to the bottom end of the top wall (72) for guiding and buffering smoke discharged from the smoke outlet (6), and the blowing port (81) being aligned with a portion of the bottom end facing the guide surface (91).

8. The gas water heater according to claim 7, characterized in that: A guide body (92) is provided at the bottom end of the top wall (72); the guide body (92) is configured to guide the flow of the fluid (92), with its top end pointing toward the smoke outlet (6), and the side surface of the guide body (92) gradually expands from one end thereof close to the smoke outlet (6) and continuously extends to the bottom end of the top wall (72), and the guide surface (91) is formed along this side surface.

9. The gas water heater according to claim 8, characterized in that: The air blowing port (81) is aligned with the smoke exhaust port (74), and the top end of the guide body (92) is arranged between the air blowing port (81) and the smoke exhaust port (74).

10. The gas water heater according to claim 8, characterized in that: The buffer structure (9) further comprises a first flow-guiding cambered surface (93), wherein the first flow-guiding cambered surface (93) surrounds the flow-guiding body (92) in a closed loop; the inner end curvature of the first flow-guiding cambered surface (93) is continuously connected to the top end of the flow-guiding surface (91), and the outer end curvature is continuously connected to the bottom end of the top wall (72).

11. The gas water heater according to claim 8, characterized in that: The bottom edge of the top wall (72) is surrounded by a second guide arc surface (94), and the second guide arc surface (94) extends continuously from the bottom edge of the top wall (72) to connect to the top of the side wall (73).

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