CN216448401U - Gas protection device and gas water heater - Google Patents

Abstract

The utility model discloses a gas protection device and a gas water heater, wherein the gas protection device comprises: the gas inlet, the inner cavity and the gas outlet form a gas channel; the movable sealing mechanism is positioned in the inner cavity and connected with the shell; the memory metal part is connected with the movable sealing mechanism and can deform according to temperature change to drive the movable sealing mechanism to plug the gas channel. When the airflow flows backwards, high-temperature gas generated by combustion of the gas flows back, so that the memory metal piece in the shell is heated to deform, the memory metal piece drives the movable sealing mechanism to plug the gas channel, the gas supply is cut off, the combustion of the gas is stopped, and accidents are avoided. Therefore, the effect of automatically cutting off the gas supply can be realized without depending on an electric control mode when the airflow flows backwards, and the reliability is favorably improved.

Description

Gas protection device and gas water heater

technical field

The utility model relates to the field of gas water heaters, in particular to a gas protection device and a gas water heater.

Background technique

Gas water heaters are commonly used gas equipment in households. Gas water heaters are provided with a smoke exhaust pipe that communicates with the outside world, so as to discharge the flue gas generated after gas combustion to the outside world, thereby ensuring safe use. However, in windy weather, the airflow may be poured back from the exhaust pipe, causing the flame to spill over to affect other devices, and even cause accidents such as burning the water heater and causing electricity leakage.

In the prior art, some gas-fired water heaters are equipped with wind pressure sensors. By detecting the wind pressure, the solenoid valve is controlled to cut off the gas supply and stop the gas combustion when the wind pressure is too large, that is, when the airflow is reversed, so as to avoid accidents. However, using the wind pressure sensor to control the solenoid valve belongs to the electric control method, which needs to consume electric energy, and there is a situation of electric control failure, and the reliability is insufficient.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a gas protection device, which can automatically cut off the gas supply in the event of airflow backflow without relying on electric control.

The utility model also proposes a gas-fired water heater, which can automatically cut off the gas supply in the event of airflow backflow without relying on electric control.

The gas protection device according to the embodiment of the first aspect of the present invention includes: a casing, the casing is provided with an inner cavity, an air inlet and an air outlet communicating with the inner cavity, the air inlet, the inner cavity and a gas outlet to form a gas channel; a movable sealing mechanism, located in the inner cavity and connected with the casing; a memory metal piece, connected with the movable sealing mechanism, the memory metal piece can be deformed according to temperature changes to drive The movable sealing mechanism blocks the gas passage.

The gas protection device according to the embodiment of the present invention has at least the following beneficial effects: the air inlet on the casing can be communicated with the air inlet pipe of the gas water heater, the air outlet on the casing can be communicated with the burner of the gas water heater, and the gas passes through the gas water heater. The intake pipe and the gas channel enter the burner for combustion. During normal operation, the high-temperature gas generated by the combustion of the gas rises and is discharged. When the airflow reverses, the high-temperature gas generated by the combustion of the gas flows back, causing the memory metal parts in the shell to be heated. Deformation, and then the memory metal parts drive the movable sealing mechanism to block the gas channel, cut off the gas supply, stop the gas burning, and avoid accidents. In this way, without relying on the electronic control method, the effect of automatically cutting off the gas supply can be realized when the airflow is reversed, which is beneficial to improve the reliability.

According to some embodiments of the present invention, the movable sealing mechanism includes a support seat, a sliding block and a matching seat all located in the inner cavity, the support seat and the matching seat are respectively connected with the housing, and the support seat and the matching seat are respectively connected to the housing. The seat is provided with a first ventilation hole, the matching seat is provided with a second ventilation hole, one end of the memory metal piece is connected to the support base, the other end of the memory metal piece is connected to the slider, the The deformation of the memory metal piece can drive the slider to block the second vent hole.

According to some embodiments of the present invention, a first positioning portion and a second positioning portion are provided on a wall surface of the housing forming the inner cavity, the first positioning portion can abut with the support seat, and the The second positioning portion can abut with the matching seat.

According to some embodiments of the present invention, a first guide structure is disposed between the slider and the matching seat, and the first guide structure is used to limit the moving direction of the slider.

According to some embodiments of the present invention, the first guide structure includes a guide column arranged on the slider and a guide hole arranged on the matching seat, and the guide column is penetrated in the guide hole .

According to some embodiments of the present invention, a sealing ring is provided between the sliding block and the matching seat.

According to some embodiments of the present invention, the memory metal member is a memory spring.

According to some embodiments of the present invention, the support base is provided with a second guide structure, and the second guide structure is used to limit the deflection of the memory spring.

According to some embodiments of the present invention, the second guide structure includes a protruding portion disposed on the support seat, the protruding portion is passed through the memory spring, and the protruding portion is provided with A vent group communicated with the first vent hole.

The gas water heater according to the embodiment of the second aspect of the present invention includes a body and the above-mentioned gas protection device, the body is provided with an air intake pipe and a burner, and the casing is respectively connected with the air intake pipe and the burner.

The gas water heater according to the embodiment of the present invention has at least the following beneficial effects: the casing is respectively connected with the intake pipe and the burner, so that the gas in the intake pipe can be transported to the burner through the gas channel for combustion. When the airflow backflow occurs, the high-temperature gas generated by the burner's combustion flows back, causing the memory metal parts to be heated and deformed, and then the memory metal parts drive the movable sealing mechanism to block the gas passage, cut off the gas supply, and stop the gas combustion. A wall accident occurs. In this way, without relying on the electronic control method, the effect of automatically cutting off the gas supply can be realized when the airflow is reversed, which is beneficial to improve the reliability.

Additional aspects and advantages of the invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a perspective exploded view of one embodiment of the gas protection device of the present invention;

2 is a cross-sectional view of the first state of one embodiment of the gas protection device of the present invention;

3 is a cross-sectional view of the second state of one embodiment of the gas protection device of the present invention;

FIG. 4 is a schematic diagram of one embodiment of the gas water heater of the present invention.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as a limitation of the present invention.

In the description of the present utility model, it should be understood that the orientation descriptions related to orientations, such as up, down, front, rear, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings, only It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the present utility model, if it is described that the first and the second are only for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicit Indicates the order of the indicated technical features.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution .

As shown in FIG. 1 to FIG. 4 , the gas protection device according to the embodiment of the present invention includes: a housing 100 , the housing 100 is provided with an inner cavity 110 , an air inlet 120 and an air outlet 130 communicating with the inner cavity 110 , The air inlet 120, the inner cavity 110 and the air outlet 130 form a gas channel; the movable sealing mechanism 200 is located in the inner cavity 110 and is connected with the casing 100; the memory metal piece 300 is connected with the movable sealing mechanism 200, and the memory metal piece 300 can Deformation is generated according to the temperature change to drive the movable sealing mechanism 200 to block the gas passage.

The air inlet 120 on the casing 100 can be communicated with the air inlet pipe 710 of the gas water heater, and the air outlet 130 on the casing 100 can be communicated with the burner 720 of the gas water heater. Combustion, during normal operation, the high-temperature gas generated by the combustion of the gas rises and is discharged. When the airflow is reversed, the high-temperature gas generated by the combustion of the gas flows back, causing the memory metal piece 300 in the housing 100 to be heated and deformed, and then the memory metal piece 300 drives the movable sealing mechanism 200 to block the gas channel, cut off the gas supply, stop the gas combustion, and avoid accidents. In this way, without relying on the electronic control method, the effect of automatically cutting off the gas supply can be realized when the airflow is reversed, which is beneficial to improve the reliability.

The memory metal has the characteristic that after plastic deformation occurs in a certain temperature range, it can restore its original shape in another temperature range. According to this, the memory metal piece 300 restores its original shape after being heated, that is, the deformation can drive the movable sealing mechanism 200 to act. .

1 to 3 , in some embodiments of the present invention, the movable sealing mechanism 200 includes a support seat 210 , a sliding block 220 and a matching seat 230 all located in the inner cavity 110 . The support seat 210 and the matching seat 230 are respectively connected with The housing 100 is connected, the support seat 210 is provided with a first ventilation hole 211 , the matching seat 230 is provided with a second ventilation hole 231 , one end of the memory metal piece 300 is connected with the support seat 210 , and the other end of the memory metal piece 300 is connected with the slider 220 After the connection, the deformation of the memory metal piece 300 can drive the slider 220 to block the second vent hole 231 .

The support seat 210 is provided with a first ventilation hole 211, and the matching seat 230 is provided with a second ventilation hole 231. The gas can flow through the air inlet 120, the first ventilation hole 211, the second ventilation hole 231 and the air outlet 130. Gas delivery during operation. When the airflow backflow occurs, the memory metal piece 300 is heated and deformed to drive the slider 220 to move to the position where the second vent hole 231 on the matching seat 230 is blocked, so as to achieve the purpose of blocking the gas passage, and the structure is simple and easy to implement.

2 and 3 , in some embodiments of the present invention, a first positioning portion 140 and a second positioning portion 150 are provided on the wall surface of the housing 100 forming the inner cavity 110 , and the first positioning portion 140 can be connected with the support seat. 210 abuts against each other, and the second positioning portion 150 can abut against the mating seat 230 .

The support seat 210 is in contact with the first positioning portion 140 and the matching seat 230 is abutted with the second positioning portion 150, so that the distance between the support seat 210 and the matching seat 230 is more stable, which is beneficial to prevent the memory metal piece 300 from being heated. The sliding block 220 does not block the second ventilation hole 231 , and when the memory metal piece 300 is heated, the process that the sliding block 220 can block the second ventilation hole 231 is more reliable, and at the same time, the assembly is more convenient.

In some embodiments of the present invention, both the support seat 210 and the matching seat 230 are in an interference fit with the housing 100 for fixing.

1 to 3 , in some embodiments of the present invention, a first guide structure 400 is disposed between the slider 220 and the matching seat 230 , and the first guide structure 400 is used to limit the moving direction of the slider 220 .

By providing the first guide structure 400 to limit the moving direction of the slider 220, the slider 220 can more stably block the second ventilation hole 231, which is beneficial to improve reliability.

Referring to FIGS. 1 to 3 , in some embodiments of the present invention, the first guide structure 400 includes a guide post 410 provided on the slider 220 and a guide hole 420 provided on the matching seat 230 , the guide post 410 passing through in the guide hole 420 .

The guide post 410 on the slide block 220 passes through the guide hole 420 on the matching seat 230, so that the slide block 220 can only move along the direction in which the guide post 410 extends into or exits the guide hole 420, so as to achieve the purpose of guiding. Simple and easy to implement.

The first guide structure 400 may also be an embodiment including a protruding block provided on the slider 220 and a guide groove provided on the housing 100 . The protruding block is located in the guide groove to limit the moving direction of the slider 220 .

Referring to FIGS. 1 to 3 , in some embodiments of the present invention, a sealing ring 500 is disposed between the sliding block 220 and the mating seat 230 .

The sealing ring 500 is arranged between the slider 220 and the mating part, so that the slider 220 can more reliably block the second vent hole 231 on the mating seat 230, which is beneficial to improve the ability of the slider 220 to block the second vent hole 231 tightness.

1 to 3 , in some embodiments of the present invention, the memory metal member 300 is a memory spring. The structure and shape of the memory spring is beneficial to generate large deformation when heated, so as to drive the slider 220 to generate displacement, which is beneficial to improve reliability and facilitate the size design of each object.

1 to 3 , in some embodiments of the present invention, the support base 210 is provided with a second guide structure 600, and the second guide structure 600 is used to limit the deflection of the memory spring.

Due to the structural characteristics of the memory spring, the memory spring may be offset and skewed when it is deformed by force. Therefore, the second guide structure 600 is provided to limit the offset of the memory spring, which is beneficial to improve reliability.

1 to 3 , in some embodiments of the present invention, the second guide structure 600 includes a protruding portion 610 disposed on the support base 210 , the protruding portion 610 is inserted through the memory spring, and the protruding portion 610 An air hole group 620 communicated with the first air hole 211 is provided on the air hole.

The protruding portion 610 is disposed in the memory spring, so that the memory spring can only deform along the length direction of the protruding portion 610, which is beneficial to make the deformation of the memory spring more stable, prevent offset and skew, and improve reliability. The bulge 610 is provided with an air hole group 620 communicating with the first ventilation hole 211 to ensure the smooth flow of the gas passage.

Referring to FIG. 4 , the gas water heater according to the second aspect of the present invention includes a body 700 and the above-mentioned gas protection device. The body 700 is provided with an intake pipe 710 and a burner 720 , and the casing 100 is connected to the intake pipe 710 and the burner respectively. device 720 is connected.

The casing 100 is connected with the intake pipe 710 and the burner 720 respectively, so that the gas in the intake pipe 710 can be delivered to the burner 720 through the gas passage for combustion. When the air flow backflow occurs, the high-temperature gas generated by the combustion of the burner 720 flows back, causing the memory metal piece 300 to be deformed by heat, and then the memory metal piece 300 drives the movable sealing mechanism 200 to block the gas passage, cut off the gas supply, and stop the combustion of the gas. A wall accident occurred. In this way, without relying on the electronic control method, the effect of automatically cutting off the gas supply can be realized when the airflow is reversed, which is beneficial to improve the reliability.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

Of course, the invention of the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can also make equivalent modifications or replacements without violating the spirit of the present invention, and these equivalent modifications or replacements are included in the right of the application within the limits of the requirements.

Claims (10)

1. Gas protection device, its characterized in that includes:

the gas-fired water heater comprises a shell (100), wherein the shell (100) is provided with an inner cavity (110), and a gas inlet (120) and a gas outlet (130) which are communicated with the inner cavity (110), and the gas inlet (120), the inner cavity (110) and the gas outlet (130) form a gas channel;

a movable sealing mechanism (200) located in the internal cavity (110) and connected with the housing (100);

the memory metal part (300) is connected with the movable sealing mechanism (200), and the memory metal part (300) can deform according to temperature change to drive the movable sealing mechanism (200) to block the gas channel.

2. The gas protection device of claim 1, wherein: the movable sealing mechanism (200) comprises a supporting seat (210), a sliding block (220) and a matching seat (230) which are all located in an inner cavity (110), the supporting seat (210) and the matching seat (230) are respectively connected with the shell (100), the supporting seat (210) is provided with a first vent hole (211), the matching seat (230) is provided with a second vent hole (231), one end of the memory metal piece (300) is connected with the supporting seat (210), the other end of the memory metal piece (300) is connected with the sliding block (220), and the memory metal piece (300) generates deformation and can drive the sliding block (220) to block the second vent hole (231).

3. The gas protection device of claim 2, wherein: the wall surface of the inner cavity (110) formed by the shell (100) is provided with a first positioning part (140) and a second positioning part (150), the first positioning part (140) can be abutted against the supporting seat (210), and the second positioning part (150) can be abutted against the matching seat (230).

4. The gas protection device of claim 2, wherein: a first guide structure (400) is arranged between the sliding block (220) and the matching seat (230), and the first guide structure (400) is used for limiting the moving direction of the sliding block (220).

5. The gas protection device of claim 4, wherein: the first guide structure (400) comprises a guide column (410) arranged on the sliding block (220) and a guide hole (420) arranged on the matching seat (230), and the guide column (410) penetrates through the guide hole (420).

6. The gas protection device of claim 2, wherein: and a sealing ring (500) is arranged between the sliding block (220) and the matching seat (230).

7. The gas protection device of claim 2, wherein: the memory metal part (300) is a memory spring.

8. The gas protection device of claim 7, wherein: the supporting seat (210) is provided with a second guide structure (600), and the second guide structure (600) is used for limiting the deviation of the memory spring.

9. The gas protection device of claim 8, wherein: the second guide structure (600) comprises a protruding portion (610) arranged on the supporting seat (210), the protruding portion (610) penetrates through the memory spring, and an air hole group (620) communicated with the first air hole (211) is arranged on the protruding portion (610).

10. Gas heater, its characterized in that: comprising a body (700) and a gas protection device according to any one of claims 1 to 9, the body (700) being provided with an air inlet duct (710) and a burner (720), the housing (100) being connected to the air inlet duct (710) and the burner (720), respectively.

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