CN212881792U - Hydrogen filtering device - Google Patents

Hydrogen filtering device Download PDF

Info

Publication number
CN212881792U
CN212881792U CN202021615008.6U CN202021615008U CN212881792U CN 212881792 U CN212881792 U CN 212881792U CN 202021615008 U CN202021615008 U CN 202021615008U CN 212881792 U CN212881792 U CN 212881792U
Authority
CN
China
Prior art keywords
hydrogen
casing
housing
filtering device
cylinder
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
CN202021615008.6U
Other languages
Chinese (zh)
Inventor
刘洪新
孟令航
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.)
Shenzhen Zhonghydrogen Technology Co ltd
Henan China Hydrogen Power Research Institute Co ltd
Original Assignee
Shenzhen Zhonghydrogen Technology Co ltd
Henan China Hydrogen Power Research Institute 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 Shenzhen Zhonghydrogen Technology Co ltd, Henan China Hydrogen Power Research Institute Co ltd filed Critical Shenzhen Zhonghydrogen Technology Co ltd
Priority to CN202021615008.6U priority Critical patent/CN212881792U/en
Application granted granted Critical
Publication of CN212881792U publication Critical patent/CN212881792U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

Landscapes

  • Fuel Cell (AREA)

Abstract

The utility model provides a hydrogen filter equipment, relates to gas filter equipment technical field, including casing, intake pipe and outlet duct, sets up the filtrate that is arranged in filtering the vapor in the hydrogen in the casing, and the top that the casing was passed to the one end of intake pipe stretches out outside the casing, the other end stretches into below the liquid level of the filtrate in the casing, and the outlet duct sets up in the top of casing and communicates the inside and the outside of casing. This hydrogen filter equipment can filter the hydrogen of high humidity for the vapor that carries in the hydrogen reduces, thereby satisfies fuel cell's demand, avoids influencing fuel cell's life-span and power.

Description

Hydrogen filtering device
Technical Field
The utility model relates to a gas filtering device technical field particularly, relates to a hydrogen filter equipment.
Background
Hydrogen energy is a recognized clean energy source that is emerging as a high energy density and zero carbon energy source. The hydrogen combustion product is only water, has no negative influence on the environment, can be directly converted into electric energy by using the hydrogen-oxygen fuel cell, and can be widely applied to different fields such as vehicle-mounted hydrogen energy power systems, marine hydrogen energy power systems, portable hydrogen energy power supplies and the like as power energy.
The novel solid hydrolysis hydrogen production material can provide a reliable hydrogen source for a hydrogen energy system, however, the hydrogen produced by hydrolysis of the solid hydrolysis hydrogen production material has the characteristic of high humidity, the characteristic can affect the service life and power of the hydrogen-oxygen fuel cell, and serious potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydrogen filter equipment can filter the hydrogen of high humidity for the vapor that carries in the hydrogen reduces, thereby satisfies fuel cell's demand, avoids influencing fuel cell's life-span and power.
The embodiment of the utility model is realized like this:
an embodiment of the utility model provides a hydrogen filter equipment, including casing, intake pipe and outlet duct, set up the filtrate that is arranged in filtering the vapor in the hydrogen in the casing, the one end of intake pipe is passed the top of casing stretches out to the casing is outer, the other end stretches into below the liquid level of filtrate in the casing, the outlet duct set up in the top of casing and intercommunication the inside and the outside of casing. This hydrogen filter equipment can filter the hydrogen of high humidity for the vapor that carries in the hydrogen reduces, thereby satisfies fuel cell's demand, avoids influencing fuel cell's life-span and power.
Optionally, in a preferred embodiment of the present invention, the device further includes a drain pipe, a water inlet end of the drain pipe is disposed on the outer wall surface of the casing and is communicated with the inside of the casing, and a water outlet end of the drain pipe extends toward a side close to the top of the casing.
Optionally, in a preferred embodiment of the present invention, a stop valve is disposed on the drain pipe.
Optionally, in the preferred embodiment of the present invention, the heat dissipation device further comprises a heat dissipation coil, the heat dissipation coil is coiled on the inner wall surface of the housing, the water inlet end and the water outlet end of the heat dissipation coil all extend out of the housing, and the water inlet end of the heat dissipation coil is used for communicating with the water pump.
Optionally, in a preferred embodiment of the present invention, the housing includes a barrel and a cover, the barrel is a hollow structure with an opening, and the cover covers the opening end of the barrel.
Optionally, in a preferred embodiment of the present invention, an internal thread is provided on an inner wall surface of the cover, an external thread is provided on an outer wall surface of the cylinder, and the cover is in threaded connection with the cylinder.
Optionally, in a preferred embodiment of the present invention, the air inlet pipe and the air outlet pipe are respectively disposed on the cover body.
Optionally, in an embodiment of the present invention, the outer wall surface of the barrel is provided with a plurality of supporting legs, and the supporting legs are located at the bottom of the barrel.
Optionally, in the preferred embodiment of the present invention, the cross-sectional shape of the cylinder is circular, and the plurality of supporting legs are uniformly arranged along the circumferential direction of the cylinder.
Optionally, in a preferred embodiment of the present invention, the cylinder and the cover are made of transparent materials.
The utility model discloses beneficial effect includes:
the hydrogen filtering device comprises a shell, an air inlet pipe and an air outlet pipe, wherein filtering liquid used for filtering vapor in hydrogen is arranged in the shell, one end of the air inlet pipe penetrates through the top of the shell and extends out of the shell, the other end of the air inlet pipe extends below the liquid level of the filtering liquid in the shell, and the air outlet pipe is arranged at the top of the shell and is communicated with the inside and the outside of the shell. When the hydrogen of high humidity passes through hydrogen filter equipment, can get into in the casing through the one end of intake pipe, because the other end submergence of intake pipe is below the liquid level of filtrate, consequently, the hydrogen of high humidity can let in the filtrate earlier. Then, under the filtering action of the filtering liquid, the carried water vapor can be filtered out by the high-humidity hydrogen, and the hydrogen can continuously rise from the filtering liquid due to the characteristic of small density of the hydrogen and is finally discharged out of the shell through the air outlet pipe. To sum up, hydrogen filter equipment can filter the hydrogen of high humidity for the vapor that carries in the hydrogen reduces, thereby satisfies fuel cell's demand, avoids influencing fuel cell's life-span and power.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to these drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a hydrogen filtering apparatus according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a hydrogen filtering device according to an embodiment of the present invention.
Icon: 100-a hydrogen filtration device; 10-a housing; 11-a barrel body; 12-a cover body; 20-an air inlet pipe; 30-an air outlet pipe; 40-liquid discharge pipe; 50-heat dissipation coil pipe; 60-supporting the feet.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters indicate like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The hydrogen prepared by hydrolyzing the solid hydrolysis hydrogen production material has the characteristic of high humidity. The high-humidity hydrogen refers to the fact that a large amount of water vapor is carried in the hydrogen, and the characteristic will affect the service life and the power of the hydrogen-oxygen fuel cell, so that a serious safety hazard exists. Therefore, the present embodiment provides a hydrogen filtering apparatus 100, which can filter hydrogen with high humidity, so that water vapor carried in the hydrogen is reduced, thereby satisfying the requirement of the fuel cell and avoiding the influence on the service life and power of the fuel cell.
Referring to fig. 1 and 2, the hydrogen filtering apparatus 100 includes a housing 10, an inlet pipe 20 and an outlet pipe 30, wherein a filtering liquid for filtering water vapor in hydrogen is disposed in the housing 10, one end of the inlet pipe 20 penetrates through the top of the housing 10 and extends out of the housing 10, the other end of the inlet pipe extends below the liquid level of the filtering liquid in the housing 10, and the outlet pipe 30 is disposed at the top of the housing 10 and communicates the inside and the outside of the housing 10.
First, when the high-humidity hydrogen gas passes through the hydrogen filter device 100, the high-humidity hydrogen gas may enter the housing 10 through one end of the air inlet pipe 20, and since the other end of the air inlet pipe 20 is immersed below the liquid level of the filtrate, the high-humidity hydrogen gas may be introduced into the filtrate first. Then, under the filtering action of the filtering liquid, the high-humidity hydrogen can filter the carried water vapor, and because the hydrogen has the characteristic of small density, the hydrogen can continuously rise from the filtering liquid and is finally discharged out of the shell 10 through the gas outlet pipe 30.
Secondly, the filtering liquid only needs to be capable of filtering out water vapor carried in the high-humidity hydrogen, and the selection of the filtering liquid is not particularly limited, and a person skilled in the art should be able to reasonably select and design the filtering liquid according to actual conditions. For example, the filtrate may be water, a sodium hydroxide solution, a calcium chloride solution, or the like, and when water is selected as the filtrate, the economic cost of filtering hydrogen gas through the hydrogen gas filtering apparatus 100 is relatively low due to the low economic cost of water compared to when a sodium hydroxide solution or a calcium chloride solution is selected as the filtrate.
As described above, the hydrogen filtering apparatus 100 includes the housing 10, the air inlet pipe 20 and the air outlet pipe 30, the filtering liquid for filtering the water vapor in the hydrogen gas is disposed in the housing 10, one end of the air inlet pipe 20 penetrates through the top of the housing 10 and extends out of the housing 10, the other end of the air inlet pipe extends below the liquid level of the filtering liquid in the housing 10, and the air outlet pipe 30 is disposed at the top of the housing 10 and communicates the inside and the outside of the housing 10. When the high-humidity hydrogen gas passes through the hydrogen gas filtering device 100, the high-humidity hydrogen gas can enter the housing 10 through one end of the air inlet pipe 20, and the other end of the air inlet pipe 20 is immersed below the liquid level of the filtering liquid, so that the high-humidity hydrogen gas can be firstly introduced into the filtering liquid. Then, under the filtering action of the filtering liquid, the high-humidity hydrogen can filter the carried water vapor, and because the hydrogen has the characteristic of small density, the hydrogen can continuously rise from the filtering liquid and is finally discharged out of the shell 10 through the gas outlet pipe 30. In conclusion, the hydrogen filtering device 100 can filter the hydrogen with high humidity, so that the water vapor carried in the hydrogen is reduced, the requirement of the fuel cell is met, and the service life and the power of the fuel cell are prevented from being influenced.
Along with the continuous progress of the filtering process, the water vapor filtered by the filtering liquid in the casing 10 can be continuously accumulated, so that the liquid level in the casing 10 continuously rises, and in order to conveniently and timely discharge the redundant liquid, in the present embodiment, the hydrogen filtering device 100 further includes a liquid discharge pipe 40, a water inlet end of the liquid discharge pipe 40 is disposed on the outer wall surface of the casing 10 and is communicated with the inside of the casing 10, and a water outlet end of the liquid discharge pipe 40 extends towards one side close to the top of the casing 10.
It should be noted that, the height of the water outlet end of the liquid discharge pipe 40 is not limited in this embodiment, and those skilled in the art should be able to make reasonable selection and design according to actual situations, and it is only necessary that the liquid in the housing 10 can be discharged through the liquid discharge pipe 40, so as to keep the liquid level in the housing 10 safe, and the phenomenon that the liquid in the housing 10 is too high and even overflows to the outside of the housing 10 does not occur.
Optionally, a shut-off valve is provided on the drain 40.
It should be noted that, when being provided with the stop valve on the fluid-discharge tube 40, the operator can open the stop valve earlier, forms the linker structure to make the liquid in the casing 10 can be followed the fluid-discharge tube 40 and discharged, when the liquid level in the casing 10 is lower, closes the stop valve again, avoids the liquid level in the casing 10 to hang down excessively, and hydrogen filter device 100 can not play the effect of effective filtration hydrogen.
Further, in order to make the opening and closing of the valve more reliable and reduce the labor of the operator, a sensor for detecting the liquid level may be disposed on the inner wall surface of the housing 10, and then an electromagnetic valve may be disposed on the drain pipe 40, the sensor and the electromagnetic valve are electrically connected to the controller, and the controller controls the opening and closing of the electromagnetic valve according to the liquid level signal detected by the sensor.
The hydrogen of hydrogen manufacturing material preparation of hydrolysising through solid hydrolysis, except the characteristic that has the high humidity, still have the characteristic of high temperature, this characteristic also can exert an influence to oxyhydrogen fuel cell life-span and power, there is serious potential safety hazard, therefore, in this embodiment, the hydrogen that has high humidity and high temperature characteristic simultaneously, when the filtrate through hydrogen filter equipment 100 in, except that can make the vapor that carries in the hydrogen reduce, can also make the temperature of hydrogen reduce, thereby satisfy fuel cell's demand, avoid exerting an influence to fuel cell's life-span and power.
However, as the filtering process is continuously performed, the temperature absorbed by the filtering liquid in the housing 10 is continuously accumulated, which results in that the temperature of the liquid in the housing 10 is continuously increased, in order to allow the hydrogen filtering device 100 to continuously and reliably act on the hydrogen gas having the characteristics of high humidity and high temperature, the temperature of the liquid in the housing 10 needs to be reduced, and therefore, in this embodiment, the hydrogen filtering device 100 further includes the heat dissipation coil 50, the heat dissipation coil 50 is coiled on the inner wall surface of the housing 10, the water inlet end and the water outlet end of the heat dissipation coil 50 both extend out of the housing 10, and the water inlet end of the heat dissipation coil 50 is used for being communicated with the water pump. By adding the heat radiation coil 50, water having a relatively low temperature is continuously supplied into the heat radiation coil 50, thereby taking out heat of the liquid in the housing 10.
In addition, the hydrogen prepared by hydrolyzing the general solid hydrolysis hydrogen production material may also carry some impurities, including gaseous impurities (e.g., chlorine, carbon monoxide, etc.) and/or solid impurities (e.g., active metal and compound fine powder thereof, sand particles, etc.), and the purity of the hydrogen also may affect the service life and power of the fuel cell, therefore, in this embodiment, when the prepared hydrogen passes through the filtrate in the hydrogen filtering apparatus 100, under the filtering action of the filtrate, not only can the water vapor carried in the hydrogen be filtered out, the effect of reducing humidity be achieved, the heat carried in the hydrogen can be absorbed, the effect of reducing the temperature is achieved, the impurities carried in the hydrogen can be filtered out, and the effect of purifying the hydrogen is achieved.
It should be noted that, in this case, the filtering liquid needs to be capable of filtering not only the water vapor carried in the hydrogen gas with high humidity, but also the impurities carried in the hydrogen gas containing the impurities, and the selection of the filtering liquid is not particularly limited, and those skilled in the art should be able to make reasonable selection and design according to the actual situation. Illustratively, the filtrate may be water, sodium hydroxide solution, calcium chloride solution, or the like.
In this embodiment, the housing 10 includes a cylindrical body 11 and a cover 12, the cylindrical body 11 has an open hollow structure, and the cover 12 covers the open end of the cylindrical body 11. In order to prevent the filtrate in the housing 10 from leaking outside the housing 10, in this embodiment, an internal thread is provided on the inner wall surface of the lid 12, an external thread is provided on the outer wall surface of the cylinder 11, and the lid 12 is screwed to the cylinder 11. To facilitate observing the liquid level in the housing 10, both the barrel 11 and the cover 12 may be made of transparent materials, such as plastic and glass.
In the present embodiment, the inlet duct 20 and the outlet duct 30 are respectively provided on the cover 12. Of course, in other embodiments, the air outlet 30 may also be disposed on the cylinder 11, or the air outlet 30 may also be disposed on the side wall surface where the cover 12 and the cylinder 11 are attached to each other. It should be noted that there is no conflict with the aforementioned outlet duct 30 being located at the top of the housing 10, as the top of the housing 10 is a broad term and the portion above the middle of the housing 10 may be considered to be within the scope of the top of the housing 10.
In this embodiment, the outer wall surface of the cylinder 11 is provided with a plurality of supporting legs 60, and the supporting legs 60 are all located at the bottom of the cylinder 11. In the present embodiment, the cross-sectional shape of the cylinder 11 is circular, and the plurality of support legs 60 are uniformly arranged along the circumferential direction of the cylinder 11. Of course, the cross-sectional shape of the cylinder 11 may be rectangular, and in this case, the supporting legs 60 may be disposed on opposite sides of the rectangular structure, so that the cylinder 11 can be kept balanced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a hydrogen filter equipment, its characterized in that includes casing, intake pipe and outlet duct, set up the filtrate that is arranged in filtering the vapor in the hydrogen in the casing, the one end of intake pipe is passed the top of casing stretches out to the casing is outer, the other end stretches into below the liquid level of filtrate in the casing, the outlet duct set up in the top of casing and intercommunication the inside and the outside of casing.
2. The hydrogen gas filtering device according to claim 1, further comprising a drain pipe, wherein a water inlet end of the drain pipe is disposed on the outer wall surface of the housing and communicates with the inside of the housing, and a water outlet end of the drain pipe extends toward a side near the top of the housing.
3. The hydrogen gas filtering device according to claim 2, wherein a shut-off valve is provided on the drain pipe.
4. The hydrogen filtering device according to claim 1, further comprising a heat dissipation coil, wherein the heat dissipation coil is coiled on the inner wall surface of the housing, the water inlet end and the water outlet end of the heat dissipation coil both extend out of the housing, and the water inlet end of the heat dissipation coil is used for being communicated with a water pump.
5. The hydrogen filtering device according to any one of claims 1 to 4, wherein the housing comprises a cylinder body and a cover body, the cylinder body is of a hollow structure with an opening, and the cover body covers the opening end of the cylinder body.
6. The hydrogen gas filtering device according to claim 5, wherein an internal thread is provided on an inner wall surface of the lid body, an external thread is provided on an outer wall surface of the cylinder body, and the lid body is screwed to the cylinder body.
7. The hydrogen gas filtering device according to claim 5, wherein the inlet pipe and the outlet pipe are respectively provided on the lid body.
8. The hydrogen filtering device according to claim 5, wherein the outer wall surface of the cylinder is provided with a plurality of supporting legs, and the supporting legs are all positioned at the bottom of the cylinder.
9. The hydrogen gas filtering device according to claim 8, wherein the cross-sectional shape of the cylinder is circular, and the plurality of support legs are uniformly arranged in the circumferential direction of the cylinder.
10. The hydrogen gas filtering device according to claim 5, wherein the cylinder and the cover are both made of transparent materials.
CN202021615008.6U 2020-08-06 2020-08-06 Hydrogen filtering device Active CN212881792U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021615008.6U CN212881792U (en) 2020-08-06 2020-08-06 Hydrogen filtering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021615008.6U CN212881792U (en) 2020-08-06 2020-08-06 Hydrogen filtering device

Publications (1)

Publication Number Publication Date
CN212881792U true CN212881792U (en) 2021-04-06

Family

ID=75235740

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021615008.6U Active CN212881792U (en) 2020-08-06 2020-08-06 Hydrogen filtering device

Country Status (1)

Country Link
CN (1) CN212881792U (en)

Similar Documents

Publication Publication Date Title
CN212881792U (en) Hydrogen filtering device
CN206473980U (en) Absorber and exhaust treatment system
CN109590447A (en) A kind of protective device for die casting machine
CN109185164A (en) A kind of hermetically sealed liquid metal mechanical pump
CN210509772U (en) Integrated multifunctional hydraulic oil tank
CN208356417U (en) A kind of construction dust-extraction unit
CN210560793U (en) Hydrogen and air hydrocarbon removing all-in-one machine
CN219792499U (en) Hydrogen production dewatering structure
CN216203962U (en) Movable industrial air conditioner capable of effectively preventing condensed water from overflowing
CN214715156U (en) Chemical production is with high-efficient type tail gas processing apparatus
CN213147126U (en) Air cooling device for air inlet of large air separation plant
CN213221298U (en) Industrial waste gas recycling device
CN218726420U (en) Test system for purifying material
CN217002110U (en) Automatic blowdown oil storage tank of diesel generating set
CN214004345U (en) Water purifier with wireless control function
CN216073133U (en) Defoaming purifier is used in potato washing waste water protein extraction
CN220169434U (en) Moisturizing subassembly
CN210660847U (en) Built-in filter screen type oil filtering device
CN209764658U (en) Particle detector waste liquid collection device
CN212721686U (en) Automatic weighing system for aluminum oxide powder for lithium battery
CN219344948U (en) Water pump with filtering capability
CN215566934U (en) Vertical pump filtering and protecting device
CN214631676U (en) Water storage device, water storage heating device and water purification heating device
CN217208231U (en) Flange plate for pipeline
CN215559009U (en) Ozone discharge chamber

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant