CN111312481A - Cooling device for transformer - Google Patents

Cooling device for transformer Download PDF

Info

Publication number
CN111312481A
CN111312481A CN202010113439.0A CN202010113439A CN111312481A CN 111312481 A CN111312481 A CN 111312481A CN 202010113439 A CN202010113439 A CN 202010113439A CN 111312481 A CN111312481 A CN 111312481A
Authority
CN
China
Prior art keywords
transformer
cooling
box body
heat dissipation
placing
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.)
Granted
Application number
CN202010113439.0A
Other languages
Chinese (zh)
Other versions
CN111312481B (en
Inventor
范孝强
张文刚
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.)
Inner Mongolia Deguang Electric Co ltd
Original Assignee
Inner Mongolia Deguang Electric 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 Inner Mongolia Deguang Electric Co ltd filed Critical Inner Mongolia Deguang Electric Co ltd
Priority to CN202010113439.0A priority Critical patent/CN111312481B/en
Publication of CN111312481A publication Critical patent/CN111312481A/en
Application granted granted Critical
Publication of CN111312481B publication Critical patent/CN111312481B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/08Cooling; Ventilating
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/08Cooling; Ventilating
    • H01F27/10Liquid cooling
    • H01F27/12Oil cooling
    • H01F27/14Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/08Cooling; Ventilating
    • H01F27/10Liquid cooling
    • H01F27/18Liquid cooling by evaporating liquids
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/40Structural association with built-in electric component, e.g. fuse
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/40Structural association with built-in electric component, e.g. fuse
    • H01F27/402Association of measuring or protective means
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/40Structural association with built-in electric component, e.g. fuse
    • H01F27/402Association of measuring or protective means
    • H01F2027/406Temperature sensor or protection

Abstract

The invention discloses a cooling device for a transformer, which comprises a cooling box body, a cooling structure and a transformer placing structure, wherein the cooling structure of a cooling fan comprises a cooling fan and a cooling machine base, the transformer placing structure comprises a ventilation net, a motor, a placing platform, a coupler, a guardrail and a transformer placing box, the cooling air circulation structure comprises a cooling air circulation pipeline, a branch pipeline and a cooling air outflow pipeline, the cooling box body is arranged for the transformer, the cooling effect on the transformer is realized by adopting the combined action of the cooling fan and cooling air, meanwhile, as steam is generated in the cooling box body in the cooling process to influence the use of electrical equipment, an active carbon adsorption layer is arranged, so that the transformer equipment is in a dry environment, and as the guardrail is arranged on the side edge of the device, the temperature, the humidity and the illumination in the transformer can be detected in real time, ensuring that the device can be in a safe state.

Description

Cooling device for transformer
Technical Field
The invention relates to a cooling device, in particular to a cooling device for a transformer.
Background
A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and an iron core (magnetic core). The main functions are as follows: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization, and the like. According to the application, the method can be divided into: power transformers and special transformers.
Under the environment that the transformer is commonly used, can produce a large amount of heats and be difficult to discharge, the transformer is fixed form moreover mostly, and heat abstractor is difficult to dispel the heat to each position of transformer, and the heat radiation structure radiating effect who has now simultaneously is not good, and simple heat dissipation fan can not make the temperature of transformer descend to get off.
Disclosure of Invention
The present invention is directed to a cooling device for a transformer, which solves the above problems of the related art.
In order to achieve the purpose, the invention provides the following technical scheme:
a cooling device for a transformer comprises a cooling box body, a cooling structure and a transformer placing structure, wherein the cooling structure is positioned inside the cooling box body, the cooling structure comprises a heat dissipation fan heat dissipation structure, a transformer placing structure and an air conditioning circulation structure, the heat dissipation fan heat dissipation structure comprises a heat dissipation fan and a heat dissipation machine base, the heat dissipation machine base is arranged at the bottom of the cooling box body, the heat dissipation fan is fixed on the heat dissipation machine base, the transformer placing structure is positioned above the heat dissipation fan heat dissipation structure, the transformer placing structure comprises a ventilation net, a motor, a placing platform, a coupler, a guardrail and a transformer placing box, the ventilation net is positioned above the inside of the cooling box body, the motor is arranged above the ventilation net, the motor is driven to be connected with the coupler, the placing platform is arranged above the coupler, the guardrail is arranged on the side, the transformer is placed the case and is located cooling box top just the transformer is placed incasement portion and is provided with place the platform and guardrail, air conditioning circulation structure includes air conditioning flow channel, lateral conduit and air conditioning outflow pipeline, the air conditioning flow channel sets up the case top is placed to the transformer, air conditioning flow channel below is provided with the lateral conduit, the lateral conduit bottom is provided with air conditioning outflow pipeline.
As a further scheme of the invention: the placing platform is provided with a sliding groove, the bottom of the guardrail is provided with a sliding block, a fastening spring is arranged in the middle of the sliding block and is located inside the sliding groove, and a fixed telescopic rod is arranged on the side edge above the guardrail.
As a still further scheme of the invention: the inside ozone generator that is provided with of cooling box, the place the platform top is provided with the active carbon adsorption layer, the inside top of cooling box is provided with the vent.
As a still further scheme of the invention: the transformer placing box side is provided with the alarm structure, the alarm structure includes alarm box, photosensitive sensor, signal processing structure and speaker, photosensitive sensor sets up the inside side of alarm box, signal processing structure is located the photosensitive sensor side, the speaker is located alarm box side.
As a still further scheme of the invention: the top end in the cooling box body is provided with an illuminating lamp tube, and the side edge of the cooling box body is provided with an illuminating lamp switch.
As a still further scheme of the invention: a temperature sensor and a humidity sensor are arranged above the guardrail, and the temperature sensor is located on the side edge of the humidity sensor.
As a still further scheme of the invention: a handle is arranged above the cooling box body, and a motor protective shell is arranged on the ventilation net.
Compared with the prior art, the invention has the beneficial effects that: be equipped with the cooling box for the transformer, the combined action through adopting heat dissipation fan and cold air cooling has realized the cooling effect to the transformer, simultaneously because the cooling box can produce vapor and influence electrical equipment's use at the cooling in-process, so be equipped with the active carbon adsorption layer, make transformer equipment be in under the dry environment, owing to be provided with the guardrail to the device side, the bottom is provided with the spring, the top sets up because the telescopic link, the realization is fixed to the transformer, can be to the inside temperature of transformer simultaneously, humidity and illumination carry out real-time detection, ensure that the device can be in safe state, the motor drives the transformer, can make each position of transformer cool down.
Drawings
Fig. 1 is a schematic structural view of a cooling device for a transformer.
Fig. 2 is a schematic structural view of a transformer housing box in a cooling apparatus for a transformer.
Fig. 3 is a schematic structural view of a guardrail in a cooling device for a transformer.
Fig. 4 is a schematic structural view of a placement platform in a cooling device for a transformer.
Fig. 5 is a schematic diagram showing the structure of an alarm in a cooling apparatus for a transformer.
1-cooling box body, 2-radiating fan, 3-radiating fan base, 4-ventilating net, 5-motor, 6-placing platform, 7-ozone generator, 8-ventilating opening, 9-lifting handle, 10-guard bar, 11-transformer placing box, 12-coupling, 13-cold air circulating pipeline, 14-active carbon adsorption layer and 15-slide block, 16-chute, 17-fastening spring, 18-cold air outflow pipeline, 19-branch pipeline, 20-temperature sensor, 21-humidity sensor, 22-lighting lamp tube, 23-alarm structure, 23-fixed telescopic rod, 24-photosensitive sensor, 25-signal processing structure, 26-loudspeaker, 27-alarm box body and 28-motor protective shell.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
Referring to fig. 1-5, a cooling device for a transformer comprises a cooling box 1, a cooling structure and a transformer placing structure, wherein the cooling structure is located inside the cooling box 1, the cooling structure comprises a heat dissipation fan heat dissipation structure, a transformer placing structure and an air conditioning circulation structure, the heat dissipation fan heat dissipation structure comprises a heat dissipation fan 2 and a heat dissipation base 3, the heat dissipation base 3 is arranged at the bottom of the cooling box 1, the heat dissipation fan 2 is fixed on the heat dissipation base 3, the transformer placing structure is located above the heat dissipation fan heat dissipation structure, the transformer placing structure comprises a ventilation net 4, a motor 5, a placing platform 6, a coupler 12, a guardrail 10 and a transformer placing box 11, the ventilation net 4 is located above the inside of the cooling box 1, the motor 5 is arranged above the ventilation net 4, and the motor 5 is in driving connection with the coupler 12, the utility model discloses a cooling box, including shaft coupling 12, place platform 6, transformer, cold air circulation structure, cold air circulation pipeline 13, lateral conduit 19 and cold air outflow pipeline 18, cold air circulation pipeline 13 sets up the transformer is placed case 11 tops, cold air circulation pipeline 13 below is provided with lateral conduit 19, lateral conduit 19 bottom is provided with cold air outflow pipeline 18, the transformer is placed case 1 tops just the transformer is placed 11 inside place platform 6 and the guardrail 10 of being provided with, cold air circulation structure includes cold air circulation pipeline 13, lateral conduit 19 and cold air outflow pipeline 18. Place the transformer inside the transformer places case 11, because motor 5 drive shaft coupling 12, shaft coupling 12 drives place the platform 6 afterwards, and the air current that will dispel the heat and fan 2 drives makes the transformer be in the ventilation state, effectually realizes the cooling to the transformer, because the existence of cold air pipeline afterwards, can be more efficient realize the management and control to the temperature of device inside.
In the cooling device for the transformer, a sliding groove 16 is formed in the placing platform 6, a sliding block 15 is arranged at the bottom of the guardrail 10, a fastening spring 17 is arranged in the middle of the sliding block 15, the fastening spring 17 is located inside the sliding groove 16, and a fixing telescopic rod 23 is arranged on the side edge above the guardrail 10. Firstly, prop open guardrail 10, place into the middle of guardrail 10 with the transformer, because fastening spring 17's effect has realized fixing the transformer, secondly the fixed telescopic link 23 at top is fixed transformer top, ensures that the transformer is in fixed state.
In the cooling device for the transformer, the ozone generator 7 is arranged inside the cooling box body 1, the activated carbon adsorption layer 14 is arranged above the placing platform 6, and the ventilation opening 8 is arranged above the inside of the cooling box body 1. The ozone generator 7 is used for ensuring that peculiar smell generated by the transformer can be effectively removed, the activated carbon adsorption layer 14 is used for ensuring that moisture in the device is effectively removed, the inside of the device is in a dry state, and the ventilation opening 8 is used for ensuring relative convection of air.
In the cooling device for the transformer, the side of the transformer placing box 11 is provided with the alarm structure 23, the alarm structure 23 comprises an alarm box body 27, a photosensitive sensor 24, a signal processing structure 25 and a loudspeaker 26, the photosensitive sensor 24 is arranged on the inner side of the alarm box body 27, the signal processing structure 25 is arranged on the side of the photosensitive sensor 24, and the loudspeaker 26 is arranged on the side of the alarm box body 27. The alarm structure 23 enables real-time monitoring of the safety inside the device, the light-sensitive sensor 24 ensuring that no sparks occur inside the device.
In the cooling device for the transformer, the top end inside the cooling box body 1 is provided with the lighting lamp tube 22, and the side edge of the cooling box body 1 is provided with the lighting lamp switch.
In the cooling device for the transformer, a temperature sensor 20 and a humidity sensor 21 are arranged above the guardrail 10, and the temperature sensor 20 is positioned at the side of the humidity sensor 21.
Example 2
Compared with embodiment 1, the improvement point of the present embodiment is that: a handle 9 is arranged above the cooling box body 1, and a motor protective shell 28 is arranged on the ventilation net 4.
The working principle of the invention is as follows: at first strut guardrail 10, place into the middle of guardrail 10 with the transformer, because fastening spring 17's effect has realized the fixed to the transformer, secondly the fixed telescopic link 23 at top is fixed the transformer top, ensure that the transformer is in the stationary state, afterwards because motor 5 drives shaft coupling 12, shaft coupling 12 drives place the platform 6, the air current that will dispel the heat and fan 2 drive makes the transformer be in the ventilation state, effectually realize the cooling to the transformer, afterwards because the existence of cold air pipeline, can be more efficient realize the management and control to the inside temperature of device.
The invention has the beneficial effects that: be equipped with the cooling box for the transformer, the combined action through adopting heat dissipation fan and cold air cooling has realized the cooling effect to the transformer, simultaneously because the cooling box can produce vapor and influence electrical equipment's use at the cooling in-process, so be equipped with the active carbon adsorption layer, make transformer equipment be in under the dry environment, owing to be provided with the guardrail to the device side, the bottom is provided with the spring, the top sets up because the telescopic link, the realization is fixed to the transformer, can be to the inside temperature of transformer simultaneously, humidity and illumination carry out real-time detection, ensure that the device can be in safe state, the motor drives the transformer, can make each position of transformer cool down.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (7)

1. A cooling device for a transformer comprises a cooling box body (1), a cooling structure and a transformer placing structure, wherein the cooling structure is positioned inside the cooling box body (1), and is characterized in that the cooling structure comprises a heat dissipation fan heat dissipation structure, a transformer placing structure and an air conditioning circulation structure, the heat dissipation fan heat dissipation structure comprises a heat dissipation fan (2) and a heat dissipation machine base (3), the heat dissipation machine base (3) is arranged at the bottom of the cooling box body (1), the heat dissipation fan (2) is fixed on the heat dissipation machine base (3), the transformer placing structure is positioned above the heat dissipation fan heat dissipation structure, the transformer placing structure comprises a ventilation net (4), a motor (5), a placing platform (6), a coupler (12), a guardrail (10) and a transformer placing box (11), the ventilation net (4) is positioned above the inside the cooling box body (1), ventilation net (4) top is provided with motor (5), motor (5) drive connection shaft coupling (12), shaft coupling (12) top is provided with place the platform (6), place the platform (16) side is provided with guardrail (10), the transformer is placed case (11) and is located cooling box (1) top just the transformer is placed case (11) inside and is provided with place the platform (6) and guardrail (10), air conditioning circulation structure includes air conditioning flow conduit (13), lateral conduit (19) and air conditioning outflow pipeline (18), air conditioning flow conduit (13) set up box (11) top is placed to the transformer, air conditioning flow conduit (13) below is provided with lateral conduit (19), lateral conduit (19) bottom is provided with air conditioning outflow pipeline (18).
2. The cooling device for the transformer according to claim 1, wherein a sliding groove (16) is arranged on the placing platform (6), a sliding block (15) is arranged at the bottom of the guardrail (10), a fastening spring (17) is arranged in the middle of the sliding block (15), the fastening spring (17) is located inside the sliding groove (16), and a fixed telescopic rod (23) is arranged on the upper side edge of the guardrail (10).
3. The cooling device for the transformer according to claim 2, wherein an ozone generator (7) is arranged inside the cooling box body (1), an activated carbon adsorption layer (14) is arranged above the placing platform (6), and a ventilation opening (8) is arranged above the inside of the cooling box body (1).
4. Cooling device for a transformer according to claim 3, characterized in that an alarm structure (23) is arranged at the side of the transformer placing box (11), the alarm structure (23) comprises an alarm box body (27), a photosensitive sensor (24), a signal processing structure (25) and a loudspeaker (26), the photosensitive sensor (24) is arranged at the inner side of the alarm box body (27), the signal processing structure (25) is arranged at the side of the photosensitive sensor (24), and the loudspeaker (26) is arranged at the side of the alarm box body (27).
5. The cooling device for the transformer according to claim 4, wherein an illuminating lamp tube (22) is arranged at the top end inside the cooling box body (1), and an illuminating lamp switch is arranged at the side edge of the cooling box body (1).
6. Cooling device for a transformer according to claim 5, characterized in that a temperature sensor (20) and a humidity sensor (21) are arranged above the guardrail (10), the temperature sensor (20) being located at the side of the humidity sensor (21).
7. The cooling device for the transformer according to claim 6, wherein a handle (9) is arranged above the cooling box body (1), and a motor protective shell (28) is arranged on the ventilation net (4).
CN202010113439.0A 2020-02-24 2020-02-24 Cooling device for transformer Active CN111312481B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010113439.0A CN111312481B (en) 2020-02-24 2020-02-24 Cooling device for transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010113439.0A CN111312481B (en) 2020-02-24 2020-02-24 Cooling device for transformer

Publications (2)

Publication Number Publication Date
CN111312481A true CN111312481A (en) 2020-06-19
CN111312481B CN111312481B (en) 2021-01-19

Family

ID=71160256

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010113439.0A Active CN111312481B (en) 2020-02-24 2020-02-24 Cooling device for transformer

Country Status (1)

Country Link
CN (1) CN111312481B (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104319069A (en) * 2014-10-28 2015-01-28 成都峰达科技有限公司 Temperature control device of transformer
CN107221409A (en) * 2017-08-02 2017-09-29 深圳柒祁祺商贸有限公司 A kind of transformer with damping, waterproof and heat sinking function
CN206849620U (en) * 2017-06-06 2018-01-05 国网江苏省电力公司连云港供电公司 A kind of multi-functional power transformer with cooling mechanism
CN207127849U (en) * 2017-08-31 2018-03-23 葛军 A kind of power network Tool Cabinet with moisture-proof function
CN207381227U (en) * 2017-10-26 2018-05-18 广州市鹏宇电子产品及塑胶吸塑产品有限公司 A kind of transformer with heat sinking function
CN207572234U (en) * 2017-12-10 2018-07-03 王勇 A kind of body structure of box-type power transformer
CN207704979U (en) * 2017-12-14 2018-08-07 西安奥邦科技有限责任公司 A kind of string frequency power commutating reactor winding on-line cooling device
CN108831680A (en) * 2018-06-26 2018-11-16 河南亚邦电气有限公司 A kind of outdoor high-low pressure electric power mutual-inductor with defencive function
CN110060842A (en) * 2019-05-28 2019-07-26 江苏西力欧智能电气科技有限公司 One kind can thermostatically controlled device for transformer
CN209401435U (en) * 2019-08-14 2019-09-17 广州市思正电子科技有限公司 A kind of transformer with dust reduction capability
CN209515399U (en) * 2019-04-03 2019-10-18 广州荣轩电力工程有限公司 A kind of novel high-pressure isolation high-power transformer
CN209729656U (en) * 2019-05-10 2019-12-03 合肥景喜电气设备有限公司 A kind of transformer fast cooling device

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104319069A (en) * 2014-10-28 2015-01-28 成都峰达科技有限公司 Temperature control device of transformer
CN206849620U (en) * 2017-06-06 2018-01-05 国网江苏省电力公司连云港供电公司 A kind of multi-functional power transformer with cooling mechanism
CN107221409A (en) * 2017-08-02 2017-09-29 深圳柒祁祺商贸有限公司 A kind of transformer with damping, waterproof and heat sinking function
CN207127849U (en) * 2017-08-31 2018-03-23 葛军 A kind of power network Tool Cabinet with moisture-proof function
CN207381227U (en) * 2017-10-26 2018-05-18 广州市鹏宇电子产品及塑胶吸塑产品有限公司 A kind of transformer with heat sinking function
CN207572234U (en) * 2017-12-10 2018-07-03 王勇 A kind of body structure of box-type power transformer
CN207704979U (en) * 2017-12-14 2018-08-07 西安奥邦科技有限责任公司 A kind of string frequency power commutating reactor winding on-line cooling device
CN108831680A (en) * 2018-06-26 2018-11-16 河南亚邦电气有限公司 A kind of outdoor high-low pressure electric power mutual-inductor with defencive function
CN209515399U (en) * 2019-04-03 2019-10-18 广州荣轩电力工程有限公司 A kind of novel high-pressure isolation high-power transformer
CN209729656U (en) * 2019-05-10 2019-12-03 合肥景喜电气设备有限公司 A kind of transformer fast cooling device
CN110060842A (en) * 2019-05-28 2019-07-26 江苏西力欧智能电气科技有限公司 One kind can thermostatically controlled device for transformer
CN209401435U (en) * 2019-08-14 2019-09-17 广州市思正电子科技有限公司 A kind of transformer with dust reduction capability

Also Published As

Publication number Publication date
CN111312481B (en) 2021-01-19

Similar Documents

Publication Publication Date Title
CN212011833U (en) Self-heat dissipation device of box-type substation
CN203966735U (en) A kind of novel transformer
CN105825999A (en) Automatic temperature control device for power transformer
CN111312481B (en) Cooling device for transformer
CN112635157B (en) Transformer high-efficiency multiple heat dissipation device for power transmission transformer substation
CN210606885U (en) High-efficient radiating small-size transformer
CN207494758U (en) A kind of electric welding machine with excellent radiating effect and safety
CN208548211U (en) Intelligent integral transformer based on air blast cooling
CN207559391U (en) A kind of box-type substation
CN212676046U (en) Dry-type transformer with forced air cooling
CN212724903U (en) Box large-scale transformer with high heat dissipating ability
CN212481628U (en) A virus killing device for air pipe
CN206758232U (en) A kind of transformer of high efficiency and heat radiation
CN206271503U (en) Dry-type transformer case
CN216161564U (en) Quick heat abstractor based on transformer
CN207910265U (en) A kind of New removable low-pressure power distribution cabinet
CN213780764U (en) Energy-saving and environment-friendly dehumidification device applied to electrical equipment box body
CN205645448U (en) But natural cooling's transformer
CN207009238U (en) A kind of oil-filled transformer auxiliary radiating device
CN217114058U (en) Heat dissipation mechanism for power transformer
CN108687422A (en) A kind of environment-friendly type welding circuit board device
CN220085966U (en) High-frequency machine vacuum electron tube cooling device
CN218918592U (en) Ventilation and cooling device for transformer
CN212011674U (en) Sealed electric control cabinet with self-dehumidification function
CN206893401U (en) A kind of novel transformer device

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