Smoke outlet structure of water heater

Abstract

The utility model relates to a smoke outlet structure of a water heater, which comprises an outer shell, a smoke collecting hood is arranged in the outer shell, a smoke outlet is arranged on the smoke collecting hood, a receding opening for the smoke outlet to extend out is arranged at the top of the outer shell, a check valve is connected onto the smoke outlet, a first annular step is arranged on the smoke outlet, and the check valve is provided with a shell body. At least one part of the shell is inserted into the smoke outlet, the shell is provided with a second annular step attached to the first annular step, the first annular step is provided with a plurality of movable buckles, the movable buckles are provided with clamping grooves for buckling the first annular step and the second annular step, and the clamping grooves are in interference fit with the first annular step and the second annular step. The check valve and the smoke exhaust port are installed in an inserted connection pre-installation mode, then the first annular step and the second annular step are buckled through the movable buckle, and therefore the check valve is fixed to the smoke exhaust port, the check valve can be installed and disassembled only by shifting the movable buckle, the check valve has the advantage of being easy to operate, and other tools are not needed for assisting in disassembling.

Description

Technical Field

[0001] This utility model relates to a flue structure for a water heater. Background Technology

[0002] Gas water heaters are the most common type of water heater in my country. Because incomplete combustion of gas water heaters produces carbon monoxide, most gas water heaters on the market are required to use a fan to forcefully exhaust the combustion fumes outdoors. Since the exhaust pipe is connected to the outside, a check valve is connected to the exhaust pipe to prevent backflow or foreign objects from entering the gas water heater. Currently, the check valve is fixed to the gas water heater with screws, which makes disassembly difficult during maintenance.

[0003] Therefore, it is necessary to make further improvements. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned problems. We provide a flue gas outlet structure for a water heater, which makes it easier to install and disassemble the check valve.

[0005] To achieve the above objectives, this utility model provides a flue gas outlet structure for a water heater, including an outer shell, an inner smoke collection hood, and a flue gas outlet on the smoke collection hood. The top of the outer shell has a clearance opening for the flue gas outlet to extend out. A check valve is connected to the flue gas outlet, which has a first annular step. The check valve has a housing, at least a portion of which is inserted into the flue gas outlet. The housing also has a second annular step that fits against the first annular step. The first annular step has multiple movable latches, each with a groove for engaging the first and second annular steps. The grooves are interference-fitted with the first and second annular steps.

[0006] In one or more embodiments, the movable buckle is rotatably connected to the first annular step, and the movable buckle has an outwardly bent handle portion.

[0007] In one or more embodiments, the bottom surface of the first annular step is provided with a connecting post, and the movable buckle has a shaft hole that engages with the connecting post. The movable buckle can rotate relative to the first annular step by means of the engagement between the shaft hole and the connecting post.

[0008] In one or more embodiments, the lower outer edge of the first annular step and the upper outer edge of the second annular step are provided with guide slopes.

[0009] In one or more embodiments, the outer wall of the housing is tightly fitted to the inner wall of the exhaust port.

[0010] In one or more embodiments, the groove depth of the card slot is 1cm-2cm.

[0011] Compared with the prior art, the advantages of this utility model are: the check valve and the exhaust port are installed by plugging in pre-installation, and then the first and second annular steps are fastened by the movable buckle, thereby fixing the check valve on the exhaust port. Installation and disassembly can be done by simply moving the movable buckle, which has the advantage of easy operation and does not require the assistance of other tools for disassembly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the check valve installed at the exhaust port according to an embodiment of the present invention;

[0013] Figure 2 This is an enlarged view of the connection between the movable buckle and the first annular step in an embodiment of this utility model;

[0014] Figure 3 This is an enlarged view of the movable buckle engaging the first and second annular steps in an embodiment of the utility model. Detailed Implementation

[0015] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0016] Please refer to Figure 1-3 This utility model provides a flue structure for a water heater, including a housing 1, an internal smoke collection hood, and a flue 2. The top of the housing 1 has a clearance opening for the flue 2 to extend out. A check valve is connected to the flue 2. The flue 2 has a first annular step 3. The check valve has a housing 4, at least a portion of which is inserted into the flue 2. The housing 4 has a second annular step 5 that fits against the first annular step 3. The first annular step 3 has multiple movable buckles 6, each with a groove for engaging the first annular step 3 and the second annular step 5. The grooves are press-fitted with the first annular step 3 and the second annular step 5. The check valve is fixedly installed on the flue vent using the movable buckles, without the use of screws. This design uses movable buckles for fixing, and the check valve has the advantages of easy installation and disassembly, facilitating subsequent maintenance.

[0017] The movable buckle 6 is rotatably connected to the first annular step 3. The movable buckle 6 has an outwardly bent handle 7. Since the slot is interference-fitted with the first annular step and the second annular step, it has angular friction. The handle can be set to facilitate the application of force.

[0018] The bottom surface of the first annular step 3 is provided with a connecting post 8, and the movable buckle 6 has a shaft hole that cooperates with the connecting post 8. The movable buckle 6 can rotate relative to the first annular step 3 by means of the cooperation between the shaft hole and the connecting post 8. The cooperation between the connecting post and the shaft hole forms a pivot connection function, which has the advantages of simple structure and high reliability.

[0019] The lower outer edge of the first annular step 3 and the upper outer edge of the second annular step 5 are provided with guide slopes 9. The guide slopes can facilitate the connection of the movable buckle and make it easier for the buckle to engage with the first annular step and the second annular step.

[0020] The outer wall of the housing 4 is tightly fitted to the inner wall of the exhaust port 2, thereby improving the structural tightness after the housing and the exhaust port are connected.

[0021] The groove depth is 1cm-2cm, preferably 1cm, 1.5cm and 2cm, to ensure that the groove has sufficient depth to connect the first annular step and the second annular step.

[0022] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.

Claims

1. A flue gas outlet structure for a water heater, comprising a housing (1), a smoke collection hood inside the housing, a flue gas outlet (2) on the smoke collection hood, and a clearance opening at the top of the housing (1) for the flue gas outlet (2) to extend out, characterized in that: A check valve is connected to the exhaust port (2). The exhaust port (2) is provided with a first annular step (3). The check valve has a housing (4). At least a part of the housing is inserted into the exhaust port (2). The housing (4) is provided with a second annular step (5) that fits against the first annular step (3). The first annular step (3) is provided with multiple movable buckles (6). The movable buckles have slots for engaging the first annular step (3) and the second annular step (5). The slots are interference-fitted with the first annular step (3) and the second annular step (5).

2. The exhaust port structure of a water heater according to claim 1, characterized in that: The movable buckle (6) is rotatably connected to the first annular step (3), and the movable buckle (6) has an outwardly bent handle (7).

3. The exhaust port structure of a water heater according to claim 2, characterized in that: The bottom surface of the first annular step (3) is provided with a connecting post (8), and the movable buckle (6) has a shaft hole that is connected to the connecting post (8). The movable buckle (6) can rotate relative to the first annular step (3) by means of the shaft hole and the connection post (8).

4. The exhaust port structure of a water heater according to claim 3, characterized in that: The lower outer edge of the first annular step (3) and the upper outer edge of the second annular step (5) are provided with guide slopes (9).

5. The exhaust port structure of a water heater according to claim 1, characterized in that: The outer wall of the housing (4) is tightly fitted to the inner wall of the exhaust port (2).

6. The exhaust port structure of a water heater according to claim 1, characterized in that: The depth of the card slot is 1cm-2cm.

Images