CN107749579B - Distribution network secondary power supply loop temperature and humidity control equipment - Google Patents
Distribution network secondary power supply loop temperature and humidity control equipment Download PDFInfo
- Publication number
- CN107749579B CN107749579B CN201711024719.9A CN201711024719A CN107749579B CN 107749579 B CN107749579 B CN 107749579B CN 201711024719 A CN201711024719 A CN 201711024719A CN 107749579 B CN107749579 B CN 107749579B
- Authority
- CN
- China
- Prior art keywords
- temperature
- box body
- sealed box
- humidity
- power supply
- 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
Links
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 44
- 238000007791 dehumidification Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000002808 molecular sieve Substances 0.000 claims description 6
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000004512 die casting Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 description 8
- 238000004880 explosion Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 241000282414 Homo sapiens Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010061218 Inflammation Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Battery Mounting, Suspending (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a temperature and humidity control device for a secondary power supply loop of a distribution network, which comprises the following components: the sealed box body is used for installing the secondary power supply loop of the distribution network, which comprises a storage battery and a power supply unit; the sealed box cover is used for covering the sealed box body to realize a sealed box body structure; the temperature and humidity sensor is positioned in the sealed box body and/or the sealed box cover and is used for collecting the temperature and humidity in the sealed box body structure; the driving control module is arranged in the sealed box body or the sealed box cover and is used for generating a temperature and/or humidity control driving signal according to the detection result of the temperature and humidity sensor; and the control execution module is arranged in the sealed box body or the sealed box cover and is used for executing constant temperature and constant humidity control on the inside of the sealed box body structure according to the temperature and/or humidity control driving signals generated by the driving control module. The invention can provide a constant temperature and constant humidity safe operation environment for the secondary power supply loop of the distribution network.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to temperature and humidity control equipment for a secondary power supply loop of a distribution network.
Background
The existing power distribution network power intelligent box transformer, the ring main unit and secondary power supply loops of other automation systems of the distribution network do not take any operation environment temperature control measures.
Under the running environment, as the temperature sensitivity of the secondary power supply loop of the distribution network comprising the storage battery and the power supply unit is very strong, the secondary power supply loop is extremely easy to be influenced by natural environment inflammation and cold weather, thereby seriously influencing the service life of the storage battery and causing faults due to abrupt change of performance, the service life of the storage battery is only 2-3 years on average, even only 1 year, and is seriously lower than the design service life of the storage battery for 10-12 years, the service life of the storage battery is greatly reduced, the use and maintenance cost is greatly increased, and the secondary power supply loop is a huge waste of human precious resources.
Disclosure of Invention
The invention aims to solve the technical problem of providing the temperature and humidity control equipment for the secondary power supply loop of the distribution network, which can provide a constant temperature and humidity safe operation environment for the secondary power supply loop of the distribution network comprising a storage battery and a power supply unit.
The invention provides a temperature and humidity control device for a secondary power supply loop of a distribution network, which can comprise:
The sealed box body is used for installing the secondary power supply loop of the distribution network, which comprises a storage battery and a power supply unit;
The sealed box cover is used for covering the sealed box body to realize a sealed box body structure;
the temperature and humidity sensor is positioned in the sealed box body and/or the sealed box cover and is used for collecting the temperature and humidity in the sealed box body structure;
The driving control module is arranged in the sealed box body or the sealed box cover and is used for generating a temperature and/or humidity control driving signal according to the detection result of the temperature and humidity sensor;
and the control execution module is arranged in the sealed box body or the sealed box cover and is used for executing constant temperature and constant humidity control on the inside of the sealed box body structure according to the temperature and/or humidity control driving signals generated by the driving control module.
In an alternative embodiment, the control device of the present invention may further include:
And the central processing unit is connected with the temperature and humidity sensor and the driving control module and is used for controlling the driving control module to generate corresponding temperature and/or humidity control driving signals according to the temperature and humidity acquired by the temperature and humidity sensor.
In an alternative embodiment, the control device of the present invention may further include:
And the sealing ring is in seamless connection with the sealing box body and the sealing box cover, so that the sealing effect of the sealing box body structure is ensured.
In an alternative embodiment, at least one of the sealed box, the sealed box cover or the sealing ring is formed by one-time die casting with a special die.
In an alternative embodiment, a spacer structure is provided inside the sealed case to ensure that the battery is not in direct contact with the inside of the sealed case.
In an alternative embodiment, the part of the sealing box cover connected with the sealing box body is provided with a groove-shaped tooth mouth for sealing.
In an alternative embodiment, at least one of the sealed box and the sealed box cover is made of an aluminum alloy material.
In an alternative embodiment, the seal housing cover is fitted with a dedicated drain electrical interface for electrical connection with the outside of the housing.
In an alternative embodiment, the control execution module is designed integrally for a constant temperature modulation sheet, a high adsorption molecular sieve dehumidification sheet and a constant temperature and humidity modulation driver;
the driving control module is specifically used for outputting a temperature control or humidity control driving signal to the constant temperature and humidity modulator, and the constant temperature and humidity modulator driver is specifically used for controlling the heating or cooling of the constant temperature modulation sheet to realize the rising and the lowering of the temperature in the closed box structure and controlling the moisture absorption of the high-adsorption molecular sieve dehumidification sheet to realize the control of the humidity in the closed box structure.
The effective effects of the embodiment of the invention are as follows:
1) The constant temperature and constant humidity safe operation environment can be provided for the secondary power supply loop of the distribution network comprising the storage battery and the power supply unit, the purposes of prolonging the service life of the secondary power supply loop of the distribution network comprising the storage battery and the power supply unit, improving the operation safety coefficient and reducing the operation failure rate of the secondary power supply loop of the distribution network are achieved, the control technology is advanced, the structural design is scientific and reasonable, the social and economic benefits are high, the use and maintenance costs are greatly reduced, and the method is also the saving of valuable resources for human beings.
2) In the embodiment of the invention, the temperature and humidity constant temperature and humidity control of the operation environment of the secondary power supply loop of the distribution network comprising the storage battery and the power supply unit can eliminate the problems that the service life and the performance of the secondary power supply loop of the distribution network comprising the storage battery and the power supply unit are reduced due to the influence of the natural environment, the abrupt degradation is caused, the operation safety coefficient is low and the failure rate is high;
3) In the embodiment of the invention, the design of the sealed box body achieves the functions of constant temperature, moisture resistance, dust prevention and explosion prevention, not only can ensure that the inside and outside of the shell are completely sealed, waterproof and moisture resistance, but also can improve the protection level to meet the requirement of the storage battery on explosion prevention, and is beneficial to heat dissipation.
4) In the embodiment of the invention, the periphery of the interface, which is connected with the box body, of the sealing box cover is provided with the groove-shaped tooth openings for sealing, so that not only can the moistureproof sealing ring be placed, but also the positioning can be realized when the upper cover and the lower cover are installed; waterproof electrical interface to make things convenient for the electrical quick connection outside the case, not only guaranteed reliability, the conductive performance of electrical connection route, possess dampproofing, dustproof function moreover.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1a and fig. 1b are schematic views of a mounting structure of two opposite sides of a temperature and humidity control device for a secondary power circuit of a distribution network according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a control principle of a sealing box body and a functional module in a sealing cover body of the distribution network secondary power circuit temperature and humidity control device.
Detailed Description
The following description of embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced.
Fig. 1a and fig. 1b are schematic diagrams of a front and back side mounting structure of an embodiment of a temperature and humidity control device for a secondary power circuit of a distribution network according to the present invention. Fig. 2 is a schematic diagram of a control principle of a sealing box body and a functional module in a sealing cover body of the distribution network secondary power circuit temperature and humidity control device.
As shown in fig. 1a, 1b and fig. 2, the temperature and humidity control device for a secondary power supply circuit of a distribution network according to the present invention may include a sealed box 1, a sealed box cover 2,2 temperature and humidity sensors 3, a driving control module 4, 2 control execution modules 5 and a central processing unit 6, wherein:
The sealed box 1 is used for installing a secondary power circuit of a distribution network comprising a storage battery 10 and a power supply unit 20. And the sealing box cover 2 is used for covering the sealing box body 5 to realize a closed box body structure. In specific implementation, the sealing box 1 may have the following characteristics: ① The plastic is formed by one-step die casting by a special die, so that the plastic has extremely strong tightness and scientific and attractive appearance; ② The aluminum alloy material is used for ensuring the complete sealing, water resistance and moisture resistance of the inside and outside of the shell, improving the protection level to meet the explosion-proof requirement of the storage battery, and being beneficial to heat dissipation; ③ The box is internally provided with a space layer structure so as to ensure that the storage battery is not in direct contact with the inner wall of the box body, so that the storage battery shell is prevented from being directly influenced by external temperature, and the control effect of the semiconductor constant temperature regulating sheet is facilitated. The characteristic design achieves the functions of constant temperature, moisture resistance, dust prevention and explosion prevention of the temperature and humidity controllable micro device of the secondary power supply loop of the distribution network. The sealed box 2 may have the following characteristics: ① The aluminum alloy material is manufactured by adopting a special die to mold the aluminum alloy material at one time; ② A special waterproof electrical interface is designed and installed to facilitate electrical connection outside the box; ③ The periphery of the interface connected with the box body 1 is provided with a groove-shaped tooth opening 30 for sealing (as shown in fig. 1a and 1b, the box body 1 is also provided with the groove-shaped tooth opening 30 of the box body at the moment), so that a moisture-proof sealing ring can be placed, and the positioning can be realized when the upper cover and the lower cover are installed.
The 2 temperature and humidity sensors 3 are respectively arranged in the sealed box body 1 and the sealed box cover 2 and are used for collecting the temperature and humidity inside the sealed box body 1 and the sealed box cover 2. Of course, in other embodiments, the number of the temperature and humidity sensors may not be limited to 2, and the positions of the temperature and humidity sensors may also be located at any position inside the sealed box 1 and/or the sealed box cover 2, so as to ensure that the temperature and humidity in the sealed box structure are collected as accurately and comprehensively as possible.
And the driving control module 4 is arranged in the inner wall of the sealed box cover 2 and is used for generating a temperature and/or humidity control driving signal according to the detection result of the temperature and humidity sensor 2. In other embodiments, the drive control module 4 may also be located within a sealed enclosure;
And 2 control execution modules 5 which are installed in the sealed box body 1 and are connected with the driving control module 4 and are used for executing constant temperature and constant humidity control on the inside of the sealed box body structure according to the temperature and/or humidity control driving signals generated by the driving control module 4. In other embodiments, the number of control execution modules 5 is not limited to 2, and the positions may be located at any position inside the sealed box 1 and/or the sealed box cover 2. In an alternative embodiment, the control execution module 5 is a semiconductor constant temperature and constant humidity control execution unit integrally designed by a semiconductor constant temperature modulation sheet, a high adsorption molecular sieve dehumidification sheet and a constant temperature and constant humidity modulation driver, and natural heat dissipation is performed by using a comb-shaped large-area heat dissipation design outside the box, in this case, the drive control module 4 is specifically configured to output a temperature control or humidity control driving signal to the constant temperature and constant humidity modulator, and the constant temperature and constant humidity modulation driver is specifically configured to control heating or cooling of the constant temperature modulation sheet to achieve rising and lowering of the temperature in the closed box structure and control moisture absorption of the high adsorption molecular sieve dehumidification sheet to achieve control of the humidity in the closed box structure. The control execution module 5 is a temperature and humidity accurate control execution unit, and can rapidly and accurately seal the constant temperature and humidity state in a closed box structure formed by the box body 1 and the sealing cover body 2.
And the central processing unit 6 is connected with the temperature and humidity sensor 2 and the driving control module 4 and is used for controlling the driving control module 4 to generate corresponding temperature and/or humidity control driving signals according to the temperature and humidity acquired by the temperature and humidity sensor 2.
Furthermore, although not shown, in an alternative embodiment, the control apparatus of the present invention may further include:
and the sealing ring is in seamless connection with the sealing box body and the sealing box cover, so that the sealing effect of the sealing box body structure is ensured. Further, the sealing ring ① can be molded once by adopting a special mold; ② The box cover is made of silica gel material, has certain flexibility, and is inlaid into a groove-shaped tooth opening for sealing the box cover, so that the box body and the box cover are connected and fastened, and the sealing effect is ensured.
By implementing the embodiment of the invention, the following beneficial effects can be achieved:
1) The constant temperature and constant humidity safe operation environment can be provided for the secondary power supply loop of the distribution network comprising the storage battery and the power supply unit, the purposes of prolonging the service life of the secondary power supply loop of the distribution network comprising the storage battery and the power supply unit, improving the operation safety coefficient and reducing the operation failure rate of the secondary power supply loop of the distribution network are achieved, the control technology is advanced, the structural design is scientific and reasonable, the social and economic benefits are high, the use and maintenance costs are greatly reduced, and the method is also the saving of valuable resources for human beings.
2) In the embodiment of the invention, the temperature and humidity constant temperature and humidity control of the operation environment of the secondary power supply loop of the distribution network comprising the storage battery and the power supply unit can eliminate the problems that the service life and the performance of the secondary power supply loop of the distribution network comprising the storage battery and the power supply unit are reduced due to the influence of the natural environment, the abrupt degradation is caused, the operation safety coefficient is low and the failure rate is high;
3) In the embodiment of the invention, the design of the sealed box body achieves the functions of constant temperature, moisture resistance, dust prevention and explosion prevention, not only can ensure that the inside and outside of the shell are completely sealed, waterproof and moisture resistance, but also can improve the protection level to meet the requirement of the storage battery on explosion prevention, and is beneficial to heat dissipation.
4) In the embodiment of the invention, the periphery of the interface, which is connected with the box body, of the sealing box cover is provided with the groove-shaped tooth openings for sealing, so that not only can the moistureproof sealing ring be placed, but also the positioning can be realized when the upper cover and the lower cover are installed; waterproof electrical interface to make things convenient for the electrical quick connection outside the case, not only guaranteed reliability, the conductive performance of electrical connection route, possess dampproofing, dustproof function moreover.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (4)
1. The utility model provides a join in marriage net secondary power supply return circuit temperature and humidity control equipment which characterized in that includes:
The sealed box body is used for installing the secondary power supply loop of the distribution network, which comprises a storage battery and a power supply unit; a space-apart layer structure is arranged in the sealed box body so as to ensure that the storage battery is not in direct contact with the interior of the sealed box body;
The sealed box cover is used for covering the sealed box body to realize a sealed box body structure; the part of the sealing box cover, which is connected with the sealing box body, is provided with a groove-shaped tooth opening for sealing; the sealing box cover is provided with a waterproof electrical interface for electrical connection with the outside of the box body;
the temperature and humidity sensor is positioned in the sealed box body and/or the sealed box cover and is used for collecting the temperature and humidity in the sealed box body structure;
The driving control module is arranged in the sealed box body or the sealed box cover and is used for generating a temperature and/or humidity control driving signal according to the detection result of the temperature and humidity sensor;
the central processing unit is connected with the temperature and humidity sensor and the driving control module and used for controlling the driving control module to generate corresponding temperature and/or humidity control driving signals according to the temperature and humidity acquired by the temperature and humidity sensor;
The control execution module is arranged in the sealed box body or the sealed box cover and is used for executing constant temperature and constant humidity control on the inside of the sealed box body structure according to the temperature and/or humidity control driving signals generated by the driving control module; the control execution module is designed for integrating a constant temperature modulation sheet, a high adsorption molecular sieve dehumidification sheet and a constant temperature and humidity modulation driver; the constant temperature and humidity modulation driver is specifically used for controlling the heating or refrigerating of the constant temperature modulation sheet to realize the rising or the lowering of the temperature in the closed box structure, and controlling the moisture absorption of the high-adsorption molecular sieve dehumidification sheet to realize the control of the humidity in the closed box structure.
2. The distribution network secondary power loop temperature and humidity control device according to claim 1, further comprising:
And the sealing ring is in seamless connection with the sealing box body and the sealing box cover, so that the sealing effect of the sealing box body structure is ensured.
3. The distribution network secondary power supply loop temperature and humidity control device according to claim 2, wherein at least one of the sealed box body, the sealed box cover or the sealing ring is formed by one-time die casting with a special die.
4. The distribution network secondary power supply loop temperature and humidity control device according to claim 1, wherein at least one of the sealed box body and the sealed box cover is made of an aluminum alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711024719.9A CN107749579B (en) | 2017-10-27 | 2017-10-27 | Distribution network secondary power supply loop temperature and humidity control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711024719.9A CN107749579B (en) | 2017-10-27 | 2017-10-27 | Distribution network secondary power supply loop temperature and humidity control equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107749579A CN107749579A (en) | 2018-03-02 |
| CN107749579B true CN107749579B (en) | 2024-06-25 |
Family
ID=61253295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711024719.9A Active CN107749579B (en) | 2017-10-27 | 2017-10-27 | Distribution network secondary power supply loop temperature and humidity control equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107749579B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206257268U (en) * | 2016-08-31 | 2017-06-16 | 江苏弘历电气有限公司 | A kind of distribution box Special seal mechanism |
| CN106972370A (en) * | 2017-04-19 | 2017-07-21 | 深圳市安特智能控制有限公司 | A kind of intelligent semi-conductor thermostatic type distribution integrated water-proof power-supply system |
| CN208753775U (en) * | 2017-10-27 | 2019-04-16 | 深圳供电局有限公司 | Join in marriage net secondary power supply return circuit temperature and humidity control equipment |
-
2017
- 2017-10-27 CN CN201711024719.9A patent/CN107749579B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206257268U (en) * | 2016-08-31 | 2017-06-16 | 江苏弘历电气有限公司 | A kind of distribution box Special seal mechanism |
| CN106972370A (en) * | 2017-04-19 | 2017-07-21 | 深圳市安特智能控制有限公司 | A kind of intelligent semi-conductor thermostatic type distribution integrated water-proof power-supply system |
| CN208753775U (en) * | 2017-10-27 | 2019-04-16 | 深圳供电局有限公司 | Join in marriage net secondary power supply return circuit temperature and humidity control equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107749579A (en) | 2018-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206116475U (en) | Battery management system shell and battery management device with waterproof ventilation function | |
| CN107749579B (en) | Distribution network secondary power supply loop temperature and humidity control equipment | |
| CN203637544U (en) | Battery box for electric motor coach | |
| CN208753775U (en) | Join in marriage net secondary power supply return circuit temperature and humidity control equipment | |
| CN208299244U (en) | Feeder switch monitors terminal cabinet | |
| CN107547041B (en) | A kind of sun-proof type solar junction box | |
| CN216121249U (en) | Fill waterproof construction of electric pile block terminal | |
| CN201528288U (en) | Air pressure balance and water-proof dust-proof device of focusing photovoltaic module box body | |
| CN202949666U (en) | Instrument plastic casing capable of being sealed from the outside efficiently | |
| CN210577099U (en) | Industrial waste gas treatment system control cabinet with heat dissipation and moisture prevention functions | |
| CN203644843U (en) | Battery box of electric motor coach | |
| CN111026183B (en) | Low-power inspection device of wireless power device | |
| CN207664461U (en) | A kind of novel distribution cabinet | |
| CN207399204U (en) | For the reliable home furnishings intelligent power line carrier module of indoor security | |
| CN203563281U (en) | Electrical appliance cabinet with heat dissipation function | |
| CN204559498U (en) | Diode (led) module plug-in type photovoltaic cell junction box | |
| CN203312222U (en) | Vehicle-used integrated fuse relay integration box with waterproof and breathable functions | |
| CN203854024U (en) | Waterproof hair clipper with lower casing injected with silica gel | |
| CN114931087B (en) | Closed water-saving irrigation control device for farmland | |
| CN212203313U (en) | Electric regulating valve | |
| CN203054458U (en) | Highly efficient waterproof electronic clock | |
| CN202679896U (en) | Ventilation and radiation door for high-power power supply equipment | |
| CN209641591U (en) | A kind of moisture-proof relay of outdoor water-proof | |
| CN209609050U (en) | A kind of protection structure of sealing product photoelectric cell | |
| CN205583006U (en) | Battery control storehouse waterproof construction |
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 |