Gas water heater

Abstract

The utility model relates to the technical field of household appliances, and provides a gas water heater which comprises a machine shell, and a combustion chamber and an exhaust fume collecting hood are arranged in the machine shell. The exhaust fume collecting hood comprises a first hood body which extends transversely and covers the top of the combustion chamber, and a second hood body which extends vertically and is fixed in the machine shell. A smoke channel communicated with the combustion chamber is formed between the first cover body and the second cover body, and a shaded pole fan is arranged on the second cover body; the shaded pole fan is provided with fixing supporting legs fixed to the second cover body, the fixing supporting legs of the shaded pole fan are detachably installed on the second cover body, the fixed connecting position between the shaded pole fan and the second cover body faces the front panel of the machine shell, and smoke in the combustion chamber enters the smoke channel under the traction effect of the shaded pole fan. The fixed joint between the shaded pole fan and the second hood body of the exhaust fume collecting hood faces the front panel of the machine shell, so that after-sales personnel can directly disassemble and assemble the shaded pole fan from the front of the machine shell conveniently, the exhaust fume collecting hood does not need to be disassembled, then the fan is disassembled and assembled, and the fan for after-sales maintenance is disassembled and assembled conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field, concretely relates to a gas water heater. BACKGROUND

[0002] The gas water heater is also called gas water heater, which is an electric appliance for heating water with gas as fuel. The gas water heater is equipped with a combustion chamber, a burner, a heat exchanger, a fan, a smoke collecting hood and the like. The outlet of the fan is inserted into the smoke exhaust pipe at the top of the gas water heater. When the fan needs to be disassembled and repaired, the smoke collecting hood at the lower part of the fan is disassembled first, and then the fan is taken out downward. It is inconvenient to disassemble and repair the fan after sale. For example, a gas water heater is disclosed in Chinese patent No. ZL 202320648889.9. SUMMARY

[0003] The utility model provides a kind of gas water heater, fixed connection between cover pole fan and the second cover body of smoke collecting hood is towards the front panel of shell, it is convenient for after-sales personnel to directly disassemble cover pole fan from the front of shell, without removing smoke collecting hood, then disassembling fan, it is convenient for the disassembly of fan of after-sales maintenance.

[0004] A gas water heater designed for this purpose includes a shell, and the shell is equipped with a combustion chamber and a smoke collecting hood.

[0005] The smoke collecting hood includes a first cover body extending horizontally and covering the top of the combustion chamber, and a second cover body extending vertically and fixed in the shell. A flue gas passage is formed between the first cover body and the second cover body, and a cover pole fan is provided on the second cover body. The cover pole fan is provided with a fixed leg fixed on the second cover body. The fixed leg of the cover pole fan is detachably mounted on the second cover body. The fixed connection between the cover pole fan and the second cover body is towards the front panel of the shell. The flue gas in the combustion chamber enters the flue gas passage under the traction of the cover pole fan.

[0006] The cover pole fan is provided with a plurality of fixed legs fixed on the second cover body. The number of fixed legs is three or four. Three fixed legs are arranged in a triangular shape, and four fixed legs are arranged in a rectangular shape. An elastic gasket is provided on the connection and cooperation between the fixed leg and the second cover body.

[0007] The fixed leg includes a fixed block fixed on the outside of the cover pole fan, and an extension block extending towards the outside of the cover pole fan and connected with the fixed block. The extension block extends along the second cover body to increase the connection stress area between the extension block and the second cover body.

[0008] A reinforcing rib is provided on the fixed leg. One end of the reinforcing rib is connected with the fixed block, and the other end of the reinforcing rib is connected with the extension block.

[0009] The second cover body is provided with a ventilation hole communicating with the air inlet of the shrouded fan, the outer side of the casing is provided with a smoke exhaust pipe communicating with the air outlet of the shrouded fan, the casing is provided with a wind guide, the wind guide is inserted into the casing from the top of the casing and detachably connected with the air outlet of the shrouded fan, and one end of the wind guide is connected with the smoke exhaust pipe.

[0010] The shrouded fan is located above the first cover body, the first cover body is provided with an avoiding slope corresponding to the lower part of the shrouded fan, the height of the avoiding slope at one end close to the second cover body is higher than the height of the avoiding slope at the other end away from the second cover body, and a gap is left between the lower part of the shrouded fan and the avoiding slope.

[0011] The second cover body is provided with a folded edge fixed in the casing.

[0012] The first cover body is provided with a downward turned edge for fixed connection with the front panel of the combustion chamber.

[0013] The casing is provided with a heat exchanger and a burner; the heat exchanger is arranged in the combustion chamber, the burner is located at the lower part of the combustion chamber and heats the heat exchanger; the casing is provided with a cold water pipe connected with the water inlet of the heat exchanger; and the casing is provided with a hot water pipe connected with the water outlet of the heat exchanger.

[0014] One end of the cold water pipe is provided with a cold water connector; one end of the hot water pipe is provided with a hot water connector; a water flow sensor for detecting water flow is arranged between the cold water pipe and the cold water connector; and the burner is connected with a gas proportional valve and a gas connector through a gas pipeline.

[0015] The beneficial technical effects of the utility model are as follows:

[0016] The fixed connection between the shrouded fan and the second cover body of the smoke collecting cover faces the front panel of the casing, so that the shrouded fan can be directly disassembled from the front of the casing by the after-sales personnel, the smoke collecting cover does not need to be disassembled, and the fan can be disassembled, thereby facilitating the disassembly of the fan for after-sales maintenance. DRAWINGS

[0017] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0018] Fig. 1 It is a structural schematic view of a gas water heater according to an embodiment of the utility model.

[0019] Fig. 2 It is a three-dimensional structural schematic view of a gas water heater according to an embodiment of the utility model.

[0020] Fig. 3 It is an assembly and disassembly structural schematic view of a smoke collecting cover and a fan according to an embodiment of the utility model. EMBODIMENTS

[0021] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. In order to make the above objectives, characteristics and advantages of the present application more apparent and understandable, a large number of specific details are described in the following description so as to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0022] Referring to Figs. 1-3 A gas water heater comprises a casing 3, a combustion chamber 6 and a fume hood 4 are arranged in the casing 3;

[0023] The fume hood 4 comprises a first cover body 18 arranged in a transverse direction and covering the top of the combustion chamber 6, and a second cover body 19 arranged in a vertical direction and fixed in the casing 3; the first cover body 18 and the second cover body 19 form a fume passage communicating with the combustion chamber 6, and the second cover body 19 is provided with a cover fan 2; the cover fan 2 is provided with a fixed leg 20 fixed on the second cover body 19, the fixed leg 20 of the cover fan 2 is detachably mounted on the second cover body 19, and the fixed connection between the cover fan 2 and the second cover body 19 faces the front panel of the casing 3, and the fume in the combustion chamber 6 enters the fume passage under the traction of the cover fan 2.

[0024] The cover fan 2 is provided with a plurality of fixed legs 20 fixed on the second cover body 19; the number of the fixed legs 20 is three or four, the three fixed legs 20 are arranged in a triangular shape, and the four fixed legs 20 are arranged in a rectangular shape.

[0025] The fixed leg 20 comprises a fixed block 22 fixed on the outside of the cover fan 2, and an extension block 23 arranged in an extending direction towards the outside of the cover fan 2 and connected with the fixed block 22, each extension block 23 extends outwards, avoids interference between each extension block 23, and facilitates the disassembly of the cover fan 2 by assembly personnel and later maintenance personnel.

[0026] In the embodiment, the fixed leg 20 is fixed on the second cover body 19 by a screw, and an elastic gasket (not shown in the figure) is arranged on the connecting and matching part between the fixed leg 20 and the second cover body 19, and the elastic gasket has a buffering and damping effect.

[0027] The fixed leg 20 is provided with a reinforcing rib block, one end of the reinforcing rib block is connected with the fixed block 22, and the other end of the reinforcing rib block is connected with the extension block 23. The extension block 23 is arranged in an extending direction along the second cover body 19, so as to increase the connecting stress area between the extension block 23 and the second cover body 19

[0028] In the embodiment, the reinforcing rib block increases the mechanical strength of the fixing leg 20 and effectively increases the connecting strength of the shield fan 2 fixed on the second cover 19.

[0029] The second cover 19 is provided with a ventilation hole 21 communicating with the air inlet of the shield fan 2, and the outer side of the casing 3 is provided with an exhaust pipe 17 communicating with the air outlet of the shield fan 2. The casing 3 is provided with a wind guide, which is inserted into the casing 3 from the top of the casing 3 and detachably connected with the air outlet of the shield fan 2. One end of the wind guide is connected with the exhaust pipe 17.

[0030] In the embodiment, the casing 3 is provided with an exhaust seat 1 for inserting the wind guide. When the shield fan 2 needs to be disassembled later, only the fixed connection between the shield fan 2 and the second cover 19 and the connection between the shield fan 2 and the wind guide need to be solved.

[0031] In the embodiment, a sealing ring is arranged between the shield fan 2 and the wind guide to prevent exhaust gas from leaking through the connection between the shield fan 2 and the wind guide.

[0032] In the embodiment, when the shield fan 2 is disassembled, only the screws of the fixing leg 20 are loosened, and then the shield fan 2 is moved downward to disengage from the wind guide. When the shield fan 2 is reinstalled, the wind guide is moved upward in the exhaust seat 1, the shield fan 2 is reconnected with the wind guide, and then the screws on the shield fan 2 are locked.

[0033] The shield fan 2 is located above the first cover 18, and the first cover 18 is provided with an avoidance inclined surface 24 corresponding to the lower part of the shield fan 2. One end of the avoidance inclined surface 24 is close to the second cover 19, and the height of the one end is higher than the height of the other end of the avoidance inclined surface 24 away from the second cover 19. A gap is left between the lower part of the shield fan 2 and the avoidance inclined surface 24.

[0034] In the gap, the first cover 18 does not contact the lower part of the shield fan 2, so that the shield fan 2 does not contact the first cover 18 when working, avoiding noise. At the same time, the assembly and disassembly of the shield fan 2 do not interfere with the first cover 18.

[0035] The second cover 19 is provided with a folded edge 25 fixed in the casing 3.

[0036] In the embodiment, the folded edge 25 is fixed in the casing 3 by screws.

[0037] The first cover 18 is provided with a lower turned edge 26 for fixed connection with the front panel of the combustion chamber 6. The front panel of the combustion chamber 6 is fixedly connected with the lower turned edge 26 by screws.

[0038] The machine shell 3 is provided with a heat exchanger 5 and a burner 15; the heat exchanger 5 is arranged in a combustion chamber 6, and the burner 15 is arranged at the lower part of the combustion chamber 6 and heats the heat exchanger 5; the machine shell 3 is provided with a cold water pipe 14 connected with the water inlet of the heat exchanger 5; and the machine shell 3 is provided with a hot water pipe 7 connected with the water outlet of the heat exchanger 5.

[0039] One end of the cold water pipe 14 is provided with a cold water joint 11; one end of the hot water pipe 7 is provided with a hot water joint 8; a water flow sensor 12 for detecting water flow is arranged between the cold water pipe 14 and the cold water joint 11; and the burner 15 is connected with a gas proportional valve 13 and a gas joint 10 through a gas pipe.

[0040] In the embodiment, the inner bottom wall of the machine shell 3 is provided with a first mounting hole for inserting the hot water joint 8, a second mounting hole for mounting the cold water joint 11, and a third mounting hole for mounting the gas joint 10.

[0041] Tap water enters the cold water joint 11, the hot water pipe connects with the hot water joint 8, and the gas pipe connects with the gas joint 10; the cold water flows into the water flow sensor 12 through the cold water joint 11, then flows into the cold water pipe 14, and then flows into the heat exchanger 5; on the other hand, when the cold water passes through the water flow sensor 12, the sensor sends a water flow signal to the controller 9, the controller 9 starts the shroud pole fan 2, and the burner 15 is ignited and the gas proportional valve 13 is opened at the same time; the gas passes through the gas proportional valve 13 to the burner 15, and the gas is ignited on the burner 15; the ignited gas becomes high-temperature flue gas, which heats the heat exchanger 5.

[0042] The water is heated in the heat exchanger 5, the hot water flows out through the hot water pipe 7 and the hot water joint 8; the high-temperature flue gas flowing through the heat exchanger 5 becomes low-temperature waste gas after passing through the smoke hood 4, and is discharged out of the machine through the smoke hood 4, the shroud pole fan 2 and the exhaust pipe 17.

[0043] The above is only a preferred embodiment of the present application, and is not intended to limit the present application; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0044] In the above description of the present application, it should be understood that if 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" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second", and the like, if any, are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or implicating the number of indicated technical features. Thus, a feature defined with "first" or "second" can include at least one of the features explicitly or implicitly. In the description of the present application, the term "a plurality of" means at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0046] In the above description of the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixed connection by screw, rivet or welding, or it can be detachable connection, or it can be integrated by metal processing (die casting, deep drawing stamping, lathe machining, etc.), or it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the above description of the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0048] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

Claims

1. A gas water heater comprising a casing (3), characterised in that: The machine shell (3) is internally provided with a combustion chamber (6) and a smoke collecting hood (4); The smoke collecting hood (4) comprises a first cover body (18) extending transversely and covering the top of the combustion chamber (6), and a second cover body (19) extending vertically and fixed in the machine shell (3); the first cover body (18) and the second cover body (19) form a flue gas passage communicating with the combustion chamber (6), and the second cover body (19) is provided with a hood fan (2); the hood fan (2) is provided with a fixed leg (20) fixed on the second cover body (19), the fixed leg (20) of the hood fan (2) is detachably mounted on the second cover body (19), and the fixed connection between the hood fan (2) and the second cover body (19) faces the front panel of the machine shell (3), and the flue gas in the combustion chamber (6) enters the flue gas passage under the traction of the hood fan (2).

2. The gas water heater of claim 1, wherein: The hood fan (2) is provided with a plurality of fixed legs (20) fixed on the second cover body (19); the number of fixed legs (20) is three or four, three fixed legs (20) are arranged in a triangular shape, and four fixed legs (20) are arranged in a rectangular shape; and an elastic gasket is arranged on the connecting and matching part between the fixed leg (20) and the second cover body (19).

3. The gas water heater of claim 1, wherein: The fixed leg (20) comprises a fixed block (22) fixed on the outside of the hood fan (2), and an extension block (23) extending towards the outside of the hood fan (2) and connected with the fixed block (22), the extension block (23) extends along the second cover body (19) to increase the connecting stress area between the extension block (23) and the second cover body (19).

4. The gas water heater of claim 3, wherein: The fixed leg (20) is provided with a reinforcing rib block, one end of the reinforcing rib block is connected with the fixed block (22), and the other end of the reinforcing rib block is connected with the extension block (23).

5. The gas water heater of claim 1, wherein: The second cover body (19) is provided with an air hole (21) communicating with the air inlet of the hood fan (2), the machine shell (3) is provided with an exhaust pipe (17) communicating with the air outlet of the hood fan (2), the machine shell (3) is provided with a wind guide, the wind guide is inserted into the machine shell (3) from the top of the machine shell (3) and is detachably connected with the air outlet of the hood fan (2), and one end of the wind guide is connected with the exhaust pipe (17).

6. The gas water heater of claim 1, wherein: The hood fan (2) is located above the first cover body (18), the first cover body (18) is provided with an avoidance inclined surface (24) corresponding to the lower part of the hood fan (2), one end of the avoidance inclined surface (24) is close to the second cover body (19) and has a height higher than that of the other end of the avoidance inclined surface (24) away from the second cover body (19); a gap is left between the lower part of the hood fan (2) and the avoidance inclined surface (24).

7. The gas water heater of claim 1, wherein: The second cover body (19) is provided with a folded edge (25) fixed in the machine shell (3).

8. The gas water heater of claim 1, wherein: The first cover body (18) is provided with a downward turned edge (26) for fixed connection with the front panel of the combustion chamber (6).

9. The gas water heater of claim 1, wherein: The machine shell (3) is provided with a heat exchanger (5) and a burner (15); the heat exchanger (5) is arranged in a combustion chamber (6), and the burner (15) is located at the lower part of the combustion chamber (6) and heats the heat exchanger (5); the machine shell (3) is provided with a cold water pipe (14) connected with the water inlet of the heat exchanger (5); and the machine shell (3) is provided with a hot water pipe (7) connected with the water outlet of the heat exchanger (5).

10. The gas water heater of claim 9, wherein: One end of the cold water pipe (14) is provided with a cold water joint (11); one end of the hot water pipe (7) is provided with a hot water joint (8); a water flow sensor (12) for detecting water flow is arranged between the cold water pipe (14) and the cold water joint (11); and the burner (15) is connected with a gas proportional valve (13) and a gas joint (10) through a gas pipeline.

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