CN218269598U - A tobacco pipe device and hanging stove equipment for hanging stove equipment - Google Patents

A tobacco pipe device and hanging stove equipment for hanging stove equipment Download PDF

Info

Publication number
CN218269598U
CN218269598U CN202222507478.6U CN202222507478U CN218269598U CN 218269598 U CN218269598 U CN 218269598U CN 202222507478 U CN202222507478 U CN 202222507478U CN 218269598 U CN218269598 U CN 218269598U
Authority
CN
China
Prior art keywords
pipe
smoke
smoke exhaust
wall
hanging stove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202222507478.6U
Other languages
Chinese (zh)
Inventor
陈威
费沈扬
赵存梓
左韦韦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Thermotechnology Shanghai Co Ltd
Original Assignee
Bosch Thermotechnology Shanghai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bosch Thermotechnology Shanghai Co Ltd filed Critical Bosch Thermotechnology Shanghai Co Ltd
Priority to CN202222507478.6U priority Critical patent/CN218269598U/en
Application granted granted Critical
Publication of CN218269598U publication Critical patent/CN218269598U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Ventilation (AREA)

Abstract

The application relates to a tobacco pipe device for hanging stove equipment includes: an intake pipe having only an axial opening and no lateral opening as an intake port; and a smoke exhaust pipe having a smoke exhaust port; and a wind blocking portion configured to block wind blowing into the smoke discharge pipe in an axial direction of the smoke discharge pipe. The application also relates to a corresponding wall-hanging stove system. The application has the advantages that: by adopting the smoke pipe device which is directly led in and led out from the side, the outer wind basically cannot influence the Venturi single pipe air pressure monitoring system of the wall-mounted furnace equipment, and therefore the wall-mounted furnace equipment with the robust air pressure monitoring function is provided, and the safety standard is met.

Description

A tobacco pipe device and hanging stove equipment for hanging stove equipment
Technical Field
The application relates to a tobacco pipe device and hanging stove equipment for hanging stove equipment.
Background
The wall-hanging stove device is common household heating equipment and comprises a wall-hanging stove and a smoke pipe device. The smoke pipe device is used for discharging waste gas of a combustion chamber of the wall-hanging stove outdoors. For safety, the wall-mounted boiler is generally provided with a wind pressure switch, namely, if the flow rate or flow of the smoke exhaust airflow does not reach the standard, the wall-mounted boiler is automatically closed to prevent accidents.
In order to gather the wind pressure, for example adopt venturi single tube air pressure monitoring system, it includes negative pressure interface and malleation interface, venturi negative pressure P1 is received to the negative pressure interface, malleation interface is received the combustion chamber pressure P2 of hanging stove. If the absolute pressure difference dP = | P1 | -P2 | is smaller than the closing value of the wind pressure switch, the wall-hanging furnace is automatically closed.
For the existing smoke tube device of the direct-in and direct-out type or the side-in and side-out type, the external wind can affect the venturi single tube air pressure monitoring system through the smoke tube device, so that the wall-mounted furnace can be closed accidentally. Specifically, with the straight-in straight-out type smoke pipe device, if the smoke exhaust pipe encounters an external wind against the smoke exhaust direction, the measured value of the venturi negative pressure P1 decreases, so that the differential pressure dP decreases, whereby the wall-hanging stove may be accidentally shut down. In the case of the side-in side-out type flue pipe device, if outside air enters the air inlet pipe through a side opening on the pipe wall of the air inlet pipe of the flue pipe device, a relative negative pressure is generated at a leeward position in the air inlet pipe, and the measured value of the combustion chamber pressure P2 is increased, so that the differential pressure dP is reduced, and thus the wall-hanging stove may be accidentally closed.
Disclosure of Invention
An object of this application is to provide a tobacco pipe device for hanging stove equipment for through adopting the tobacco pipe device of side formula of advancing directly, make outer wind basically can not cause the influence to the venturi single tube atmospheric pressure monitoring system of hanging stove equipment, thereby provide the hanging stove equipment that has the atmospheric pressure monitoring function of robust, in order to satisfy safety standard.
According to a first aspect of the present application, there is provided a smoke tube apparatus for a wall-hanging stove device, comprising:
an intake pipe having only an axial opening and no lateral opening as an intake port; and
a smoke exhaust pipe having a smoke exhaust port; and
a wind blocking portion configured to block wind blowing into the smoke discharge pipe in an axial direction of the smoke discharge pipe.
According to an alternative embodiment of the present application, the inlet duct and the exhaust duct are arranged coaxially.
According to an alternative embodiment of the application, the inlet pipe forms the outer pipe of the smoke pipe arrangement and the outlet pipe forms the inner pipe of the smoke pipe arrangement.
According to an alternative embodiment of the application, the mouth of the air inlet tube forms the air inlet.
According to an alternative embodiment of the application, the mouth of the smoke evacuation pipe is closed to form a wind shield and has a notch in the pipe wall as a side-out smoke evacuation port.
According to an optional embodiment of the present application, the smoke exhaust pipe comprises an outer deflector portion disposed between the smoke exhaust port of the smoke exhaust pipe and the air inlet of the air inlet pipe and configured to prevent smoke exhausted from the smoke exhaust port from being inhaled by the air inlet.
According to an optional embodiment of the present application, the smoke exhaust pipe comprises an inner deflector, the inner deflector comprises a turning slope, the turning slope is configured to be suitable for turning smoke flowing along an axial direction of the smoke exhaust pipe to a lateral direction along the smoke exhaust pipe so as to flow out from a smoke outlet of the smoke exhaust pipe.
According to an optional embodiment of the application, the smoke exhaust pipe comprises a grid pipe section at the free end, and a plurality of uniformly distributed gaps on the pipe wall of the grid pipe section form a smoke exhaust port of the smoke exhaust pipe.
According to an alternative embodiment of the application, the outer flow guide is configured as a flange of the smoke exhaust pipe.
According to an alternative embodiment of the application, the cut-outs in the pipe wall of the grid pipe section are substantially rectangular.
According to an alternative embodiment of the application, the distance between the outer baffle and the air inlet of the air inlet pipe is between 15 cm and 18 cm.
According to an alternative embodiment of the application, the inner side of the wind deflector forms the inner deflector.
According to an alternative embodiment of the application, the deflecting ramp is configured as a conical surface concentric with the smoke exhaust duct.
According to an alternative embodiment of the application, the conical surface has a cone angle of 120 °.
According to an alternative embodiment of the present application, the inner diameter of the inlet pipe is 100 mm, and the inner diameter of the smoke exhaust pipe is 60 mm.
According to an alternative embodiment of the application, the smoke evacuation pipe is divided into a smoke evacuation pipe body and a smoke evacuation mechanism, which are independent of each other.
According to an alternative embodiment of the present application, the smoke evacuation mechanism is screwed to the smoke evacuation tube body.
According to an alternative embodiment of the application, the smoke evacuation mechanism comprises an outer flow guiding portion, a grid pipe section and a wind shield, which are integral with each other.
According to a second aspect of the present application, there is provided a wall-hanging stove apparatus comprising a wall-hanging stove and the aforementioned smoke pipe device for the wall-hanging stove apparatus.
According to an optional embodiment of the application, the hanging stove includes venturi single tube atmospheric pressure monitoring system, venturi single tube atmospheric pressure monitoring system includes negative pressure interface and malleation interface, venturi negative pressure P1 is received to the negative pressure interface, the malleation interface is received the pressure P2 of the combustion chamber of hanging stove, the hanging stove constructs: if the pressure difference dP = | P1 | -P2 | is smaller than a closing value, the wall-hanging furnace is closed.
The positive effect of this application lies in: by adopting the smoke pipe device which is directly led in and out, the outer wind basically does not influence a Venturi single pipe air pressure monitoring system of the wall-mounted furnace equipment, and therefore the wall-mounted furnace equipment with the robust air pressure monitoring function is provided, and the safety standard is met.
Drawings
The principles, features and advantages of the present application may be better understood by describing the application in more detail with reference to the accompanying drawings. The drawings comprise:
fig. 1 schematically shows an example of a smoke tube arrangement of the present application in a perspective view.
Fig. 2 shows schematically in an enlarged manner in the region of the gas inlet and the smoke outlet of the smoke tube arrangement of fig. 1 in a partial sectional view.
Detailed Description
In order to make the technical problems, technical solutions and advantageous technical effects to be solved by the present application clearer, the present application will be further described in detail with reference to the accompanying drawings and a plurality of exemplary embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the scope of the present application.
A wall-hanging stove apparatus for heating generally includes a wall-hanging stove and a smoke pipe device. The smoke pipe device is assembled on the wall-mounted furnace to suck fresh air for combustion and discharge waste gas generated by the wall-mounted furnace. To meet national standards, wall-hanging stove equipment should have the ability to continuously monitor air pressure. Current wall-hanging furnace installations use, for example, venturi single tube pressure monitoring systems. The venturi single tube air pressure monitoring system comprises a negative pressure interface and a positive pressure interface, the negative pressure interface receives venturi negative pressure P1, the positive pressure interface receives combustion chamber pressure P2 of the wall-mounted furnace. If the absolute pressure difference dP = | P1 | -P2 | is less than the preset closing value, it indicates that the flow rate of the exhaust gas stream is insufficient. For safety reasons, wall-hanging furnaces are generally arranged to shut down automatically in such situations.
The existing smoke tube device adopts a direct-in direct-out mode or a side-in side-out mode, so that the venturi negative pressure P1 and the combustion chamber pressure P2 measured by the venturi single-tube air pressure monitoring system can be influenced by outside air. Specifically, with the straight-in straight-out type smoke pipe device, if the smoke exhaust pipe encounters an external wind against the smoke exhaust direction, the measured value of the venturi negative pressure P1 decreases, so that the differential pressure dP decreases, whereby the wall-hanging stove may be accidentally shut down. In the case of the side-in side-out type flue pipe device, if outside air enters the air inlet pipe through a side opening on the pipe wall of the air inlet pipe of the flue pipe device, a relative negative pressure is generated at a leeward position in the air inlet pipe, and the measured value of the combustion chamber pressure P2 is increased, so that the differential pressure dP is reduced, and thus the wall-hanging stove may be accidentally closed.
To overcome this drawback, the present application proposes an improved, wind-resistant smoke tube arrangement.
Fig. 1 schematically shows an example of a smoke tube device for a wall-hanging stove apparatus of the present application in a perspective view.
Fig. 2 shows schematically enlarged, in a partial sectional view, the region of the air inlet 10 and the smoke outlet 21 of the smoke tube arrangement of fig. 1.
The tobacco pipe device includes:
an intake pipe 1, the intake pipe 1 having only an axial opening and no lateral opening as an intake port 10; and
a smoke exhaust pipe 2, wherein the smoke exhaust pipe 2 is provided with a smoke exhaust port 21; and
a wind blocking part 20, the wind blocking part 20 being configured to block wind blowing into the smoke discharge pipe 2 in an axial direction of the smoke discharge pipe 2.
Through the air inlet pipe 1, no lateral airflow enters the air inlet pipe 1 through the lateral opening and generates relative negative pressure, so that the pressure P2 of the combustion chamber is not influenced by external wind, and through the smoke exhaust pipe 2, particularly the wind shielding part 20 of the smoke exhaust pipe 2, wind is not directly blown into the smoke exhaust pipe 2 basically, so that the Venturi negative pressure P1 is not influenced by the external wind. Therefore, the smoke tube device with strong wind-proof capability is provided on the whole.
According to an alternative embodiment of the present application, the inlet pipe 1 and the exhaust pipe 2 are coaxially arranged. The coaxial arrangement makes the whole size of the smoke tube device compact. However, it is also conceivable that the inlet pipe 1 and the outlet pipe 2 are not arranged coaxially.
According to an alternative embodiment of the present application, the inlet pipe 1 forms the outer pipe of the smoke pipe arrangement and the exhaust pipe 2 forms the inner pipe of the smoke pipe arrangement. Since the smoke exhaust pipe 2 is filled with high-temperature smoke, the smoke exhaust pipe 2 is provided as an inner pipe so that the smoke exhaust pipe 2 is cooled by cold air in the air intake pipe 1 as an outer pipe.
According to an alternative embodiment of the present application, the orifice of the air inlet tube 1 forms the air inlet 10. The air inlet 10 can thus be conveniently formed in the form of an axial opening. Other forms of air intake 10 are also contemplated. For example, the mouth of the air inlet tube 1 is closed by a cap, and the aperture in the cap forms the air inlet 10.
According to an alternative embodiment of the application, the mouth of the smoke evacuation tube 2 is closed to form a wind shield 20 and has a cut-out in the tube wall as a side-out smoke evacuation port 21. The smoke exhaust pipe 2 can thereby be made compact. However, it is also conceivable for the smoke exhaust tube 2 to have only one axial opening as smoke exhaust 21, but for wind shields 20 in the form of wind shields to be present offset to the outside with respect to this axial opening; alternatively, the smoke exhaust pipe 2 has both a lateral opening and an axial opening as the smoke exhaust port 21.
According to an alternative embodiment of the present application, the smoke exhaust pipe 2 comprises an outer deflector 22, the outer deflector 22 being arranged between the smoke exhaust port 21 of the smoke exhaust pipe 2 and the air inlet 10 of the air intake pipe 1 and being configured and adapted to prevent smoke exhausted from the smoke exhaust port 21 from being sucked by the air inlet 10. The outer baffle 22 is configured, for example, as a flange of the smoke exhaust pipe 2. The outer flow guide 22 at least partially, in particular completely, covers the gap between the smoke exhaust pipe 2 and the air inlet pipe 1, as seen in the axial direction of the smoke tube arrangement, i.e. the outer diameter of the outer flow guide 22 is equal to or greater than the inner diameter of the air inlet pipe 1.
According to an alternative embodiment of the present application, the distance between the outer baffle 22 and the air inlet 10 of the air inlet tube 1 is between 15 cm and 18 cm. Thereby, the outer flow guide 22 does not substantially affect the intake function of the intake pipe 1.
According to an optional embodiment of the present application, tub 2 of discharging fume includes interior water conservancy diversion portion 23, interior water conservancy diversion portion 23 is including turning to the inclined plane, turn to the inclined plane and construct to be suitable for will follow the cigarette that the axial direction of tub 2 of discharging fume flows turn to following tub 2 of discharging fume the lateral direction with follow the exhaust port 21 of tub 2 of discharging fume flows. The deflecting ramp is configured, for example, as a conical surface concentric with the smoke exhaust pipe 2. The conical surface has a cone angle of, for example, 120 °. However, other configurations of the deflection ramps are also conceivable, such as truncated cones, pyramids, etc. As shown in fig. 2, the inner guide portion 23 is formed, for example, inside the windshield portion 20.
According to an alternative embodiment of the present application, the smoke exhaust pipe 2 comprises a grating pipe section 24 at the free end, and a plurality of uniformly distributed gaps on the pipe wall of the grating pipe section 24 form the smoke exhaust port 21 of the smoke exhaust pipe 2. The openings in the walls of the grid segments 24 are generally rectangular. Thereby enabling the provision of as large an exhaust port 21 as possible. It is also contemplated that the exhaust port 21 is a plurality of circular holes in the exhaust pipe 2.
According to an alternative embodiment of the present application, the inner diameter of the inlet pipe 1 is 100 mm, and the inner diameter of the exhaust pipe 2 is 60 mm.
According to an alternative embodiment of the present application, the smoke exhaust pipe 2 is divided into a smoke exhaust pipe main body and a smoke exhaust mechanism which are independent of each other. The smoke evacuation mechanism is fixed to the smoke evacuation pipe main body with screws, for example. The smoke evacuation mechanism may include, for example, an outer deflector 22, a grill section 24, and a windshield 20 that are integral with one another. Obviously, a person skilled in the art may envisage other mutual relationships than this between the parts of the smoke evacuation pipe 2 or other ways of fixing one to the other.
The smoke tube device can also comprise a sealing cover sleeved on the air inlet pipe 1, and the sealing cover is used for covering a hole which is formed in a wall body and used for allowing the smoke tube device to penetrate through so as to prevent air leakage. The smoke pipe device can also comprise an elbow part for example, because the common wall-mounted stove is vertically arranged on the wall surface in a house, and the air inlet pipe 1 and the smoke outlet pipe 2 horizontally extend out of the wall, so that the air inlet pipe 1 and the smoke outlet pipe 2 are generally arranged on the top of the wall-mounted stove through the elbow part. The sealing cover and the elbow part are only schematically shown in fig. 1 and are sufficiently known to the person skilled in the art and will not be described further here.
In this context, an "axial opening" is to be understood in particular as an opening which is open in the axial direction of the tube and through which the straight-in, straight-out gas flow passes. The axial opening is formed in particular by the mouth of the tube. A "lateral opening" is to be understood to mean, in particular, an opening which is open toward the side of the tube and through which a side-in and side-out gas flow passes. The lateral opening is formed in particular by a notch in the wall of the tube. The "free end" is in particular the end which faces away from the wall-mounted stove and projects outside the wall. "lateral" is understood to mean, in particular, a direction transverse to the axial direction of the tube.
Although specific embodiments of the present application have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the application. Various substitutions, alterations, and modifications may be conceived of without departing from the spirit and scope of the present application.
List of reference numerals
1. Air inlet pipe
10. Axial opening
2. Smoke exhaust pipe
20. Wind shield
21. Lateral opening
22. Outer flow guiding part
23. Inner flow guiding part
24. Grid pipe sections.

Claims (10)

1. A tobacco pipe device for hanging stove equipment, its characterized in that includes:
an intake pipe (1), the intake pipe (1) having only an axial opening and not a lateral opening as an intake port (10); and
a smoke exhaust pipe (2), wherein the smoke exhaust pipe (2) is provided with a smoke exhaust port (21); and
a wind shield portion (20), the wind shield portion (20) being configured to be adapted to block wind blowing into the smoke exhaust pipe (2) in an axial direction of the smoke exhaust pipe (2).
2. The smoke tube apparatus for a wall-hanging stove apparatus of claim 1, wherein the smoke tube apparatus comprises at least one of the following features:
the air inlet pipe (1) and the smoke exhaust pipe (2) are coaxially arranged;
the air inlet pipe (1) forms an outer pipe of the smoke pipe device, and the smoke exhaust pipe (2) forms an inner pipe of the smoke pipe device;
the orifice of the air inlet pipe (1) forms the air inlet (10);
the mouth of the smoke exhaust pipe (2) is closed to form a wind shield part (20), and a gap is arranged on the pipe wall to be used as a smoke exhaust port (21) for side outlet.
3. The smoke tube apparatus for a wall-hanging stove apparatus of claim 2, wherein the smoke tube apparatus comprises at least one of the following features:
the smoke exhaust pipe (2) comprises an outer flow guide part (22), the outer flow guide part (22) is arranged between the smoke exhaust opening (21) of the smoke exhaust pipe (2) and the air inlet (10) of the air inlet pipe (1) and is configured to prevent smoke exhausted from the smoke exhaust opening (21) from being sucked by the air inlet (10);
the smoke exhaust pipe (2) comprises an inner diversion part (23), the inner diversion part (23) comprises a turning inclined plane, and the turning inclined plane is configured to be suitable for turning smoke flowing along the axial direction of the smoke exhaust pipe (2) to the lateral direction of the smoke exhaust pipe (2) so as to flow out of a smoke exhaust port (21) of the smoke exhaust pipe (2);
the free end of the smoke exhaust pipe (2) comprises a grid pipe section (24), and a plurality of uniformly distributed gaps on the pipe wall of the grid pipe section (24) form a smoke exhaust port (21) of the smoke exhaust pipe (2).
4. The smoke tube apparatus for a wall-hanging stove apparatus of claim 3, wherein the smoke tube apparatus comprises at least one of the following features:
the outer deflector (22) is configured as a flange of the smoke exhaust pipe (2);
the notch on the pipe wall of the grid pipe section (24) is approximately rectangular;
the distance between the outer flow guide part (22) and the air inlet (10) of the air inlet pipe (1) is 15-18 cm;
the inner side of the wind shielding part (20) forms the inner flow guide part (23).
5. The smoke tube arrangement for wall hanging stove equipment according to claim 3, characterized in that the turning slope is configured as a conical surface concentric with the smoke exhaust tube (2).
6. The smoke tube apparatus for wall hanging stove equipment as claimed in claim 5, wherein the conical surface has a cone angle of 120 °.
7. The smoke tube apparatus for wall-hanging stove equipment as claimed in any one of claims 1 to 6, characterized in that the inner diameter of the air inlet tube (1) is 100 mm and the inner diameter of the smoke exhaust tube (2) is 60 mm.
8. The smoke tube apparatus for a wall-hanging stove device as claimed in claim 4,
the smoke exhaust pipe (2) is divided into a smoke exhaust pipe main body and a smoke exhaust mechanism which are mutually independent;
the smoke exhaust mechanism is fixed on the smoke exhaust pipe main body through a screw;
the smoke exhaust mechanism comprises an outer flow guide part (22), a grid pipe section (24) and a wind shielding part (20) which are integrated with each other.
9. A wall-hanging stove apparatus, characterized in that the wall-hanging stove apparatus comprises a wall-hanging stove and a smoke pipe device for the wall-hanging stove apparatus as claimed in any one of claims 1 to 8.
10. The wall hanging stove apparatus of claim 9, wherein the wall hanging stove comprises a venturi single tube air pressure monitoring system comprising a negative pressure interface and a positive pressure interface, the negative pressure interface receiving a venturi negative pressure P1, the positive pressure interface receiving a pressure P2 of a combustion chamber of the wall hanging stove, the wall hanging stove configured to: if the pressure difference dP = | P1 | -P2 |) is smaller than a closing value, the wall-hanging furnace is closed.
CN202222507478.6U 2022-09-21 2022-09-21 A tobacco pipe device and hanging stove equipment for hanging stove equipment Active CN218269598U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222507478.6U CN218269598U (en) 2022-09-21 2022-09-21 A tobacco pipe device and hanging stove equipment for hanging stove equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222507478.6U CN218269598U (en) 2022-09-21 2022-09-21 A tobacco pipe device and hanging stove equipment for hanging stove equipment

Publications (1)

Publication Number Publication Date
CN218269598U true CN218269598U (en) 2023-01-10

Family

ID=84715238

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202222507478.6U Active CN218269598U (en) 2022-09-21 2022-09-21 A tobacco pipe device and hanging stove equipment for hanging stove equipment

Country Status (1)

Country Link
CN (1) CN218269598U (en)

Similar Documents

Publication Publication Date Title
US3091223A (en) Sealed vent water heater
US6053162A (en) Balanced flue sealed vent terminal assembly
CN216479098U (en) Outer water conservancy diversion formula fire prevention check valve
CN218269598U (en) A tobacco pipe device and hanging stove equipment for hanging stove equipment
US3570423A (en) Chimney aspirator
CN113864492A (en) Outer water conservancy diversion formula fire prevention check valve
KR101624547B1 (en) Smoke control system for apartment house
US6543437B1 (en) Drafthood adapter assembly particularly for stoves and fireplaces
KR102065569B1 (en) An air amplification apparatus for kitchen range hood
CN215841314U (en) High flame retardant control cable
CN110057105B (en) Gas water heater
CN207880858U (en) The self-service leading-drain type exhaust smoke device of gas heater
CN109984633B (en) Electric oven air duct system
CN219913457U (en) Gas water heater
CN106642704A (en) Outdoor type gas water heater weatherproof vessel hood
CN108036365B (en) Anti-backfire kitchen range
CN215809341U (en) Smoke outlet device and water heater
CN219272536U (en) Boiler flue gas emission deslagging system
CN217829376U (en) Air filter and gas heating stove
KR100244702B1 (en) Building ventilating method and its device
CN211290111U (en) Balanced flue
CN216953572U (en) Combustion device and gas water heating equipment
US20220252263A1 (en) Vent termination for household exhaust, combustion gases and air intake
CN219510233U (en) Gas distribution valve and gas water heating equipment
CN216976812U (en) Smoke discharging assembly, smoke discharging structure and outdoor gas water heater

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant