CN106643182B - A kind of vacuum high temperature furnace water cooled electrode - Google Patents

A kind of vacuum high temperature furnace water cooled electrode Download PDF

Info

Publication number
CN106643182B
CN106643182B CN201510711954.8A CN201510711954A CN106643182B CN 106643182 B CN106643182 B CN 106643182B CN 201510711954 A CN201510711954 A CN 201510711954A CN 106643182 B CN106643182 B CN 106643182B
Authority
CN
China
Prior art keywords
electrode
water
electrode body
high temperature
cooling
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
CN201510711954.8A
Other languages
Chinese (zh)
Other versions
CN106643182A (en
Inventor
程革
吴冰
孔德惠
于洪斌
李娟�
张洋
张天龙
张晓宇
党超
刘正桐
何晓棠
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.)
Shenyang Shenzhen Vacuum Technology Co Ltd
Original Assignee
Shenyang Shenzhen Vacuum Technology 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 Shenyang Shenzhen Vacuum Technology Co Ltd filed Critical Shenyang Shenzhen Vacuum Technology Co Ltd
Priority to CN201510711954.8A priority Critical patent/CN106643182B/en
Publication of CN106643182A publication Critical patent/CN106643182A/en
Application granted granted Critical
Publication of CN106643182B publication Critical patent/CN106643182B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Furnace Details (AREA)

Abstract

The invention belongs to vacuum drying oven equipment technical field, specifically a kind of vacuum high temperature furnace water cooled electrode.Including electrode block, conducting copper belt, electrode body, water inlet pipe, influent-effluent base, water-cooling flange and angle coupling, wherein electrode body is fixedly mounted on the water-cooling flange, and insulating and sealing member is provided between the electrode body and the water-cooling flange, cooling chamber is equipped with inside the electrode body, one end of the electrode body is arranged in the influent-effluent base, the water inlet pipe is arranged on influent-effluent base, and it is accommodated in the cooling chamber of electrode body, the other end two sides of the electrode body are connected separately with conducting copper belt, the conducting copper belt passes through angle coupling respectively and is connected with electrode block.The present invention uses temperature up to 1700 DEG C, and can use under aggressive atmosphere, simple in structure, good airproof performance, long service life, and production cost is low.

Description

A kind of vacuum high temperature furnace water cooled electrode
Technical field
The invention belongs to vacuum drying oven equipment technical field, specifically a kind of vacuum high temperature furnace water cooled electrode.
Background technique
Water cooled electrode is the port of vacuum drying oven connection furnace internal heat generation body component, is connection furnace external power and furnace internal heat generation element Critical component.Raising with workpiece to vacuum drying oven operating temperature requirements, it is also corresponding using temperature to vacuum drying oven water cooled electrode Raising, can the performance quality of water cooled electrode be directly related to vacuum drying oven and touch the mark requirement.
Existing water cooled electrode is only applicable to 1400 DEG C of vacuum drying ovens below, and cannot use under aggressive atmosphere, Once being higher than this temperature or furnace including the gas that is corrosive and will damage to electrode.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of vacuum high temperature furnace water cooled electrodes.Electrode structure letter List, good airproof performance, long service life, production cost are low.
To achieve the above object, the invention adopts the following technical scheme:
A kind of vacuum high temperature furnace water cooled electrode, including electrode block, conducting copper belt, electrode body, water inlet pipe, influent-effluent base, water Cold process is blue and angle coupling, and wherein electrode body is fixedly mounted on the water-cooling flange and the electrode body and the water cooling It is provided with insulating and sealing member between orchid, cooling chamber is equipped with inside the electrode body, the influent-effluent base is arranged in the electrode One end of body, the water inlet pipe are arranged on the influent-effluent base and are accommodated in the cooling chamber of the electrode body, the electrode The other end two sides of body are connected separately with the conducting copper belt, and the conducting copper belt passes through the angle coupling and the electricity respectively Pole block is connected.
The electrode body includes electrode tip and electrode stem, and edge is axially arranged with the cooling chamber, the electricity in the electrode stem One end of pole bar is threadedly coupled with the influent-effluent base, and the other end is fixedly connected with the electrode tip, the two sides of the electrode tip It is connect respectively with the conducting copper belt.
The stepped hole coaxial with the cooling chamber of the electrode body is equipped in the influent-effluent base, the water inlet pipe is inserted in this It is threadedly coupled in stepped hole and with the outboard end of the stepped hole, the influent-effluent base is equipped with the water being connected to the stepped hole Seat apopore.
Insulating and sealing member between the electrode body and the water-cooling flange is insulation sleeve, the insulation sleeve and the water It is provided with the first sealing ring between cold process orchid, is provided with the second sealing ring between the electrode body and the insulation sleeve.
The electrode stem of the electrode body is equipped with external screw thread, and it is logical to be inserted in that the water-cooling flange is equipped with for the electrode stem In hole and pass through electrode tip axial limiting, hex nut is threaded on the electrode stem, the electrode body passes through hexagonal spiral shell Mother is fixed on the water-cooling flange, and felt pad and washer are equipped between the hex nut and the water-cooling flange, described exhausted Edge pad is arranged between the water-cooling flange and washer.
The insulation sleeve and felt pad are all made of polytetrafluoro material.
One end of the conducting copper belt is separately fixed at the two sides of the electrode tip of the electrode body by screw, and is equipped with flat Washer, spring washer and pressing plate, the pressing plate are arranged between the conducting copper belt and plain washer.
The other end of the conducting copper belt is fixed on backing plate and by screw, plain washer, spring washer and pressing plate and institute It states angle coupling to be connected, the conducting copper belt is arranged between the pressing plate and the backing plate.
Circumferentially arranged with water jacket on the sealing surface of the water-cooling flange, the water jacket outside passes through retaining ring sealing, the water The other side of cold flange sealing surface is equipped with the inlet and outlet being connected to the water jacket.
The water-cooling flange is connect by bolt with furnace body electrode flange, and the water-cooling flange and furnace body electrode flange cooperate Electrode sealing ring is provided between face.
Advantages of the present invention and good effect are as follows:
The present invention provides a kind of vacuum high temperature furnace water cooled electrodes.The electrode uses temperature up to 1700 DEG C, and can be in corruption It is used under corrosion atmosphere, simple in structure, good airproof performance, long service life, production cost is low.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention;
Fig. 2 is the structural schematic diagram of electrode body in the present invention;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the structural schematic diagram of water-cooling flange in the present invention;
Fig. 5 is the top view of water-cooling flange in the present invention;
Fig. 6 is the structural schematic diagram of electrode block in the present invention;
Fig. 7 is A-A cross-sectional view in Fig. 6.
In figure: 1 is electrode block, and 2 be pressing plate, and 3 be conducting copper belt, and 4 be electrode body, and 5 be the first sealing ring, and 6 be insulation sleeve, 7 be felt pad, and 8 be washer, and 9 be hex nut, and 10 be water inlet pipe, and 11 be influent-effluent base, and 12 be electrode sealing ring, and 13 be water cooling Flange, 14 be the second sealing ring, and 15 be backing plate, and 16 be angle coupling, and 17 be stud, and 18 be nut, and 19 are discharged for water seat Hole, 20 be retaining ring, and 21 be baffle, and 22 be electrode tip, and 23 be electrode stem.
Specific embodiment
The invention will be further described with reference to the accompanying drawing.
As shown in Figure 1, a kind of vacuum high temperature furnace water cooled electrode provided by the invention, including electrode block 1, conducting copper belt 3, electricity Pole body 4, water inlet pipe 10, influent-effluent base 11, water-cooling flange 13 and angle coupling 16, wherein electrode body 4 is fixedly mounted on the water Insulating and sealing member is provided on cold process orchid 13 and between the electrode body 4 and the water-cooling flange 13, in the electrode body 4 Portion is equipped with cooling chamber, and one end of the electrode body 4 is arranged in the influent-effluent base 11, and the water inlet pipe 10 is arranged in the disengaging It on water seat 11 and is accommodated in the cooling chamber of the electrode body 4, the other end two sides of the electrode body 4 are connected separately with one The conducting copper belt 3, two conducting copper belts 3 are connected by an angle coupling 16 with the electrode block 1 respectively.
As Figure 2-3, the electrode body 4 includes electrode tip 22 and electrode stem 23, is set in the electrode stem 23 along axial direction There is the cooling chamber, one end of the electrode stem 23 is threadedly coupled with the influent-effluent base 11, the other end and the electrode tip 22 It is fixedly connected by welding manner, postwelding is suppressed into the cooling chamber of the electrode body 4, guarantees cooling cavity pressure 4kg/cm2, There must not be leakage in half an hour.The two sides of the electrode tip 22 are connect with a conducting copper belt 3 respectively.
The stepped hole coaxial with the cooling chamber of the electrode body 4 is equipped in the influent-effluent base 11, the water inlet pipe 10 is inserted It is threadedly coupled in the stepped hole and with the outboard end of the stepped hole, the influent-effluent base 11 is equipped with and the stepped hole The water seat apopore 19 of connection, the water seat apopore 19 are vertical with the stepped hole.Raw material band can be used in each threaded connection place To prevent leak-stopping water.
Insulating and sealing member between the electrode body 4 and the water-cooling flange 13 is insulation sleeve 6,6 sets of the insulation sleeve It on the electrode stem 22 of the electrode body 4 and penetrates in the through-hole on the water-cooling flange 13, the insulation sleeve 6 and the water It is provided with the first sealing ring 5 between cold process orchid 13, the second sealing ring 14 is provided between the electrode body 4 and the insulation sleeve 6. In the present embodiment, the cross section of the insulation sleeve 6 is T-type structure, and the T-type structure is by electrode tip 22 and electrode stem 23 and the water Cold process orchid 13 is isolated, and realizes the purpose of insulation.It is set between the one side of the end shoulders of the T-type structure and the water-cooling flange 13 There is first sealing ring 5, described second is equipped between the another side of the end shoulders of the T-type structure and the electrode tip 22 Sealing ring 14.
The electrode stem 23 of the electrode body 4 is equipped with external screw thread, and the electrode stem 23 is inserted on the water-cooling flange 13 In the through-hole being equipped with and pass through 22 axial limiting of electrode tip, is threaded with hex nut 9, the electrode body 4 on electrode stem 23 It is fixed on the water-cooling flange 13 by hex nut 9, insulation is equipped between the hex nut 9 and the water-cooling flange 13 Pad 7 and washer 8, the felt pad 7 are arranged between the water-cooling flange 13 and washer 8.The insulation sleeve 6 and felt pad 7 are equal Using polytetrafluoro material.
One end of the conducting copper belt 3 is separately fixed at the two sides of the electrode tip 22 of the electrode body 4 by screw, and sets There are plain washer, spring washer and pressing plate 2, the pressing plate 2 is arranged between the conducting copper belt 3 and plain washer.The conductive copper The other end with 3 is fixed on backing plate 15 and by screw, plain washer, spring washer and pressing plate 2 and 16 phase of angle coupling Connection, the conducting copper belt 3 are arranged between the pressing plate 2 and the backing plate 15.
In the present embodiment, the 22 two sides symmetry direction of electrode tip of the electrode body 4 is respectively equipped with two groups of threaded hole (such as Fig. 3 It is shown), the conducting copper belt 3 is fixed on each threaded hole of 22 two sides of electrode tip by soket head cap screw, and is equipped with Plain washer, spring washer and pressing plate 2, wherein pressing plate 2 is arranged between the conducting copper belt 3 and plain washer.The conducting copper belt 3 The other side is connected by soket head cap screw with the angle coupling 16, is fixed on the backing plate 15 equipped with screw buckle, and be equipped with Plain washer, spring washer and pressing plate 2, the angle coupling 16 are arranged with the conducting copper belt 3 in the pressing plate 2 and the backing plate Between 15.The pressing plate 2 uses stainless steel 304 material, to ensure the conducting copper belt 3 and the electrode body 4 and described straight It is contacted between angle joint 16 good.
The conducting copper belt 3 is by being stacked with a thickness of the copper foil layer of 0.1mm, and conducting copper belt 3 described in every group has 45 copper Foil can offset the deflection of heater element by the flexibility of copper foil.
16 other end of angle coupling is connected by soket head cap screw with the electrode block 1, and is equipped with plain washer, spring Washer and pressing plate 2.As shown in fig. 6-7, the center of the electrode block 1 is equipped with the centre bore for clamping heating element, will be described Electrode block 1 is processed into symmetrical two parts along the axis of centre bore, in a portion the two sides of centre bore be symmetrically arranged with The vertical unthreaded hole of centre bore is equipped with two coaxial with two unthreaded holes respectively threaded holes on another part, passes through double end Bolt 17 is sequentially inserted into unthreaded hole and threaded hole, and is fixed with spring washer and nut, to clamp heating element.The double end Bolt 17 uses 316 stainless steel material resistant to high temperature, and above-mentioned soket head cap screw, plain washer, spring washer are stainless steel material, The electrode block 1 uses nickel material, nickel with respect to other conductive materials more resistant to high temperature and resistivity it is sufficiently low, resistivity becomes with temperature Change small, easy to process, price is lower.
As illustrated in figures 4-5, on the sealing surface of the water-cooling flange 13 circumferentially arranged with water jacket, the water-cooling flange 13 it is close The cover other side is equipped with the inlet and outlet being connected to the water jacket.Baffle is equipped between the water inlet and water outlet 21, the baffle 21 is connect using welding manner with the water-cooling flange 13, for separating the water inlet and water outlet.It is described Water jacket is externally provided with the retaining ring 20 for sealed water jacket, and the retaining ring 20 is connect using welding manner with the water-cooling flange 13, welded It is suppressed in the backward water jacket, guarantees pressure 4kg/cm in water jacket2, must not have leakage in half an hour.
The water-cooling flange 13 is connect by bolt with furnace body electrode flange, the water-cooling flange 13 and furnace body electrode flange Electrode sealing ring 12 is provided between mating surface.
The operation principle of the present invention is that:
When work, by the water inlet of influent-effluent base 11 and water-cooling flange 13 respectively to the cooling chamber of the electrode body 4 and It is filled with cooling water in the water jacket of the water-cooling flange 13, temperature when reducing electrode body 4 and the work of water-cooling flange 13, the electricity The cooling cavity outer wall of pole body 4 is thicker to be not easily susceptible to corrode and leak;In addition with heater element coupling part, set knot Structure and temperature-resistant material can work and smaller to resistivity effects under high-temperature vacuum.
The present invention provides a kind of vacuum high temperature furnace water cooled electrodes.The electrode, up to 1700 DEG C, can corroded using temperature It is used under property atmosphere, simple in structure, good airproof performance, long service life, production cost is low.

Claims (10)

1. a kind of vacuum high temperature furnace water cooled electrode, which is characterized in that including electrode block (1), conducting copper belt (3), electrode body (4), Water inlet pipe (10), influent-effluent base (11), water-cooling flange (13) and angle coupling (16), wherein electrode body (4) is fixedly mounted on institute It states on water-cooling flange (13) and is provided with insulating and sealing member between the electrode body (4) and the water-cooling flange (13), it is described Cooling chamber is equipped with inside electrode body (4), the influent-effluent base (11) is arranged in one end of the electrode body (4), the water inlet pipe (10) it is arranged on the influent-effluent base (11) and is accommodated in the cooling chamber of the electrode body (4), the electrode body (4) Other end two sides are connected separately with the conducting copper belt (3), the conducting copper belt (3) respectively by the angle coupling (16) with The electrode block (1) is connected.
2. vacuum high temperature furnace water cooled electrode according to claim 1, which is characterized in that the electrode body (4) includes electrode tip (22) and electrode stem (23), in the electrode stem (23) along being axially arranged with the cooling chamber, one end of the electrode stem (23) with The influent-effluent base (11) is threadedly coupled, and the other end is fixedly connected with the electrode tip (22), the two sides of the electrode tip (22) It is connect respectively with the conducting copper belt (3).
3. vacuum high temperature furnace water cooled electrode as described in claim 2, which is characterized in that be equipped in the influent-effluent base (11) with The coaxial stepped hole of the cooling chamber of the electrode body (4), the water inlet pipe (10) be inserted in the stepped hole and with the stepped hole Outboard end be threadedly coupled, the influent-effluent base (11) is equipped with the water seat apopore (19) that is connected to the stepped hole.
4. vacuum high temperature furnace water cooled electrode as described in claim 2, which is characterized in that the electrode body (4) and the water cooling Insulating and sealing member between flange (13) is insulation sleeve (6), is arranged between the insulation sleeve (6) and the water-cooling flange (13) Have the first sealing ring (5), the second sealing ring (14) are provided between the electrode body (4) and the insulation sleeve (6).
5. vacuum high temperature furnace water cooled electrode according to claim 4, which is characterized in that the electrode stem of the electrode body (4) (23) it is equipped with external screw thread, the electrode stem (23) is inserted in the through-hole that the water-cooling flange (13) is equipped with and passes through electricity Cartridge (22) axial limiting is threaded with hex nut (9) on the electrode stem (23), and the electrode body (4) passes through hexagonal Nut (9) is fixed on the water-cooling flange (13), and insulation is equipped between the hex nut (9) and the water-cooling flange (13) It pads (7) and washer (8), the felt pad (7) is arranged between the water-cooling flange (13) and washer (8).
6. vacuum high temperature furnace water cooled electrode as described in claim 5, which is characterized in that the insulation sleeve (6) and felt pad (7) It is all made of polytetrafluoro material.
7. vacuum high temperature furnace water cooled electrode as described in claim 2, which is characterized in that one end of the conducting copper belt (3) is logical The two sides that screw is separately fixed at the electrode tip (22) of the electrode body (4) are crossed, and are equipped with plain washer, spring washer and pressing plate (2), the pressing plate (2) is arranged between the conducting copper belt (3) and plain washer.
8. vacuum high temperature furnace water cooled electrode according to claim 7, which is characterized in that the other end of the conducting copper belt (3) It is fixed on backing plate (15) and is connected by screw, plain washer, spring washer and pressing plate (2) with the angle coupling (16), The conducting copper belt (3) is arranged between the pressing plate (2) and the backing plate (15).
9. vacuum high temperature furnace water cooled electrode according to claim 1, which is characterized in that the sealing surface of the water-cooling flange (13) On circumferentially arranged with water jacket, sealed on the outside of the water jacket by retaining ring (20), the other side of water-cooling flange (13) sealing surface Equipped with the inlet and outlet being connected to the water jacket.
10. pressing the described in any item vacuum high temperature furnace water cooled electrodes of claim 1-9, which is characterized in that the water-cooling flange (13) it is connect by bolt with furnace body electrode flange, is provided between the water-cooling flange (13) and furnace body electrode flange mating surface Electrode sealing ring (12).
CN201510711954.8A 2015-10-28 2015-10-28 A kind of vacuum high temperature furnace water cooled electrode Active CN106643182B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510711954.8A CN106643182B (en) 2015-10-28 2015-10-28 A kind of vacuum high temperature furnace water cooled electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510711954.8A CN106643182B (en) 2015-10-28 2015-10-28 A kind of vacuum high temperature furnace water cooled electrode

Publications (2)

Publication Number Publication Date
CN106643182A CN106643182A (en) 2017-05-10
CN106643182B true CN106643182B (en) 2019-05-14

Family

ID=58815979

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510711954.8A Active CN106643182B (en) 2015-10-28 2015-10-28 A kind of vacuum high temperature furnace water cooled electrode

Country Status (1)

Country Link
CN (1) CN106643182B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112097525B (en) * 2020-09-09 2022-11-01 中国振华集团云科电子有限公司 Cooling device and cooling method for vacuum atmosphere tube furnace
CN113564718A (en) * 2021-07-07 2021-10-29 中国电子科技集团公司第四十八研究所 Water-cooled electrode for semiconductor equipment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2069638U (en) * 1990-04-21 1991-01-16 张玉祥 Water-cooling complex electrode
JP3871172B2 (en) * 1998-10-05 2007-01-24 ラサ商事株式会社 Molybdenum electrode body used in the former furnace attached to the electric melting furnace
CN201032395Y (en) * 2007-05-10 2008-03-05 上海晨华电炉有限公司 Low voltage great current water cooling electrode for vacuum furnace
CN102519266A (en) * 2011-12-14 2012-06-27 张家港圣汇气体化工装备有限公司 Water-cooled electrode of high temperature vacuum furnace
CN102809298A (en) * 2012-09-13 2012-12-05 无锡四方集团真空炉业有限公司 Water-cooled electrode device for vacuum furnace
CN102954698A (en) * 2012-10-31 2013-03-06 西安合元冶金设备工程有限责任公司 High titanium slag electrode holder
CN205119841U (en) * 2015-10-28 2016-03-30 沈阳沈真真空技术有限责任公司 High temperature vacuum furnace water cooled electrode

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2069638U (en) * 1990-04-21 1991-01-16 张玉祥 Water-cooling complex electrode
JP3871172B2 (en) * 1998-10-05 2007-01-24 ラサ商事株式会社 Molybdenum electrode body used in the former furnace attached to the electric melting furnace
CN201032395Y (en) * 2007-05-10 2008-03-05 上海晨华电炉有限公司 Low voltage great current water cooling electrode for vacuum furnace
CN102519266A (en) * 2011-12-14 2012-06-27 张家港圣汇气体化工装备有限公司 Water-cooled electrode of high temperature vacuum furnace
CN102809298A (en) * 2012-09-13 2012-12-05 无锡四方集团真空炉业有限公司 Water-cooled electrode device for vacuum furnace
CN102954698A (en) * 2012-10-31 2013-03-06 西安合元冶金设备工程有限责任公司 High titanium slag electrode holder
CN205119841U (en) * 2015-10-28 2016-03-30 沈阳沈真真空技术有限责任公司 High temperature vacuum furnace water cooled electrode

Also Published As

Publication number Publication date
CN106643182A (en) 2017-05-10

Similar Documents

Publication Publication Date Title
CN102519266B (en) Water-cooled electrode of high temperature vacuum furnace
CN106643182B (en) A kind of vacuum high temperature furnace water cooled electrode
US11664516B2 (en) Assembly comprising a SOEC/SOFC-type solid oxide stack, a clamping system, and a heat exchange system
CN102679063A (en) High-performance electrical isolation flange device resisting high temperature and high pressure
CN102809298A (en) Water-cooled electrode device for vacuum furnace
CN104880105A (en) Single-tube sealed type silicon carbide tubular heat exchanger
CN202329218U (en) Water-cooled electrode of high temperature vacuum furnace
CN110243225B (en) Round block hole type silicon carbide heat exchanger
CN108072172B (en) Direct high-efficient electric heater
CN204705239U (en) Corrosion-resistant carborundum tubular heat exchanger
CN202770221U (en) Vacuum furnace water cooling electrode device
CN205119841U (en) High temperature vacuum furnace water cooled electrode
CN203936512U (en) Resistance welder intermediate frequency large power assembly
WO2023231927A1 (en) Electrode device, heater power supply structure, and furnace bottom structure of single crystal furnace
CN109661045B (en) Manufacturing method of graphene heating plate and graphene heating plate
CN105554927B (en) Far infrared carbon fiber electric heating tube
CN102949967A (en) Pinene pyrolysis device
CN203719355U (en) Detachable casting heat tracing structure
CN206247876U (en) A kind of Elema produces protection device
CN203003361U (en) Pipeline preheater
CN207991287U (en) Miniature water cooling can adjust electrode, vacuum drying oven
CN111006515B (en) Electrode assembly and high-temperature vacuum furnace
CN210154409U (en) Round block hole type silicon carbide heat exchanger
CN207651598U (en) Fuel cell
CN206905258U (en) Boundling short-circuit type electric heater

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant