CN211041247U - Building energy-saving ventilation device - Google Patents

Building energy-saving ventilation device Download PDF

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Publication number
CN211041247U
CN211041247U CN201921571357.XU CN201921571357U CN211041247U CN 211041247 U CN211041247 U CN 211041247U CN 201921571357 U CN201921571357 U CN 201921571357U CN 211041247 U CN211041247 U CN 211041247U
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CN
China
Prior art keywords
ventilation
fixing
seat
water
air
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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.)
Expired - Fee Related
Application number
CN201921571357.XU
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Chinese (zh)
Inventor
王欣
肖文君
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王欣
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Filing date
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Application filed by 王欣 filed Critical 王欣
Priority to CN201921571357.XU priority Critical patent/CN211041247U/en
Application granted granted Critical
Publication of CN211041247U publication Critical patent/CN211041247U/en
Expired - Fee Related legal-status Critical Current
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    • 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/272Solar heating or cooling
    • 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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/20Solar thermal
    • 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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/54Free-cooling systems

Abstract

The utility model discloses an energy-conserving ventilation unit of building, including ventilation case, fixing base and ventilation seat, the fixing base is all evenly installed at the both ends of ventilation case, all installs fixing bolt between two fixing bases of same end, and the inside central authorities of ventilation case install the ventilation seat, there is the dust hood one side of ventilation seat through fixed fixture block demountable installation, and the inside central authorities of baffle one side ventilation seat install two-way motor, and two-way motor's output extends to the opposite side of baffle and installs the flabellum, one side that the dust hood was kept away from to the ventilation case articulates there is the fixed plate, all evenly installs solar cell panel on the fixed plate. The utility model discloses an install ventilation case, fixing base and ventilation seat, all install fixing bolt between the both ends fixing base of ventilation case, fix the ventilation case on the required ventilated wall body of building through fixing base and fixing bolt, the fixed mounting of the device of being convenient for, the use of the device of being convenient for.

Description

Building energy-saving ventilation device
Technical Field
The utility model relates to a building ventilation unit technical field specifically is a building energy saving ventilation unit.
Background
The building ventilation means that the dirty air in the building is directly discharged to the outside or purified and then fresh air is supplemented, so that the indoor air environment is kept in accordance with the sanitary standard, and the building ventilation is an indispensable part in building construction.
Current shock attenuation ventilation is cooked and is mostly rotated through the fan and carry out convulsions, increase the air flow, long-time ventilation can use a large amount of energy consumptions, energy resource consumption is great, and humidity in the unable increase device's of current ventilation unit air, easily because of the too dry comfort level that reduces the inside people of building of air, current ventilation unit can't carry out convulsions according to environmental quality and ambient humidity simultaneously, ventilation effect is poor, long-time ventilation can make the dust adhere on the fan, reducing means's life.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an energy-conserving ventilation unit of building to solve the humidity in the air of the unable increase device of current ventilation unit who provides among the above-mentioned background art, easily because of the too dry comfort level problem that reduces the inside people of building of air.
In order to achieve the above object, the utility model provides a following technical scheme: a building energy-saving ventilation device comprises a ventilation box, fixing seats and a ventilation seat, wherein the fixing seats are uniformly arranged at two ends of the ventilation box, fixing bolts are respectively arranged between the two fixing seats at the same end, the ventilation seat is arranged in the center of the interior of the ventilation box, a dust shield is detachably arranged at one side of the ventilation seat through a fixing fixture block, a partition plate is arranged in the center of the interior of the ventilation seat, a storage battery and a single chip microcomputer are respectively arranged at one end of the interior of the ventilation seat at one side of the partition plate, the storage battery is electrically connected with the single chip microcomputer through a wire, a two-way motor is arranged in the center of the interior of the ventilation seat at one side of the partition plate, the two-way motor is electrically connected with the single chip microcomputer through a wire, the output end of the two-way motor extends, a liquid level sensor is installed on one side of the inside of the water tank, the output end of the liquid level sensor is electrically connected with the input end of the single chip microcomputer, a first water pump and a second water pump are installed at two ends of the bottom in the water tank respectively, the first water pump and the second water pump are both electrically connected with the single chip microcomputer through wires, a humidifying ring is installed on one side of the ventilating seat between the dust hood and the fan blades, a first water pipe is installed at one end of the humidifying ring, one end of the first water pipe extends into the water tank and is fixedly connected with the output end of the first water pump, a humidity sensor and an air quality sensor are installed on the ventilating boxes at two ends of the dust hood respectively, the output ends of the humidity sensor and the air quality sensor are both electrically connected with the input end of the single chip microcomputer, a fixed plate is hinged to one side of the ventilating boxes far away from the dust hood, electric telescopic rods are installed at two ends, and the central authorities of fixed plate evenly are equipped with the air duct, and the inside one end that is close to the fixed plate of air duct all installs the dust screen, all evenly install solar cell panel on the fixed plate of air duct both sides, solar cell panel passes through photovoltaic controller and battery electric connection, and the fixed plate keeps away from the top of ventilation seat one side and installs the rainwater sensor, the output of rainwater sensor and the input electric connection of singlechip, the bottom of fixed plate is equipped with the water catch bowl, and the filter plate is installed at the top of water catch bowl, and the fixed plate internally mounted of water catch bowl one side has the second water pipe, the one end of second water pipe and the input fixed connection of second water pump.
Preferably, one side of the humidifying ring close to the dust shield is uniformly provided with atomizing nozzles.
Preferably, the first water pipe and the second water pipe are both provided with electromagnetic valves, and the electromagnetic valves are electrically connected with the single chip microcomputer through leads.
Preferably, the fixing seat is evenly provided with fixing holes matched with the fixing bolts, and the ventilation box forms a fixed dismounting structure through the fixing seat and the fixing bolts.
Preferably, one side of the ventilation seat is provided with a fixing groove matched with the fixing clamping block, and the dust hood and the ventilation seat form a fixed dismounting structure through the fixing clamping block.
Preferably, the ventilation air channel and the air groove are in the same horizontal plane.
Compared with the prior art, the beneficial effects of the utility model are that: the building energy-saving ventilation device is provided with a ventilation box, a fixing seat and a ventilation seat, wherein fixing bolts are respectively arranged between the fixing seats at the two ends of the ventilation box, the ventilation box is fixed on a wall body needing ventilation of a building through the fixing seats and the fixing bolts, the fixed installation of the device is convenient, the use of the device is convenient, a dust shield is detachably arranged on one side of the ventilation seat in the ventilation box through a fixing clamping block, the fixed disassembly and assembly between the dust shield and the ventilation seat are convenient, the disassembly and cleaning of the dust shield are convenient, the dust is conveniently isolated through the dust shield, the service life of the device is convenient to prolong, fan blades are arranged at the output end of a bidirectional motor in the ventilation seat, a humidifying ring is arranged on one side of the ventilation seat between the dust shield and the fan blades, a humidity sensor and an air quality sensor are respectively arranged on the ventilation boxes at the two ends of the dust shield, the air quality sensor senses poor, the bidirectional motor rotates forwards to draw out air inside the building through the ventilation air passage, so that the ventilation performance inside the building is increased, the air inside the building is dehumidified, the side of the ventilation box, which is away from the dust hood, is hinged with the fixed plate, the solar cell panels are uniformly installed on the fixed plate, the solar cell panels are electrically connected with the storage battery inside the ventilation seat through the photovoltaic controller, the solar cell panels absorb solar energy and convert the solar energy into electric energy to be stored inside the storage battery, a standby power supply is provided for the device, the energy consumption of the device is reduced, and the energy saving performance of the device is increased conveniently, the bottom of the fixed plate is provided with the water collecting tank, one end of the second water pipe installed at one side of the water collecting tank is fixedly connected with the input end of the second water pump inside the water tank, so that rainwater is collected through the water collecting tank and is injected, the comfort level of the environment is convenient to increase, and the device is convenient to use.
Drawings
FIG. 1 is a schematic cross-sectional view of the device of the present invention;
FIG. 2 is a schematic sectional view of the water tank of the present invention;
fig. 3 is an enlarged schematic structural diagram of a in fig. 2 according to the present invention.
In the figure: 1. a ventilation box; 2. a humidity sensor; 3. fixing the fixture block; 4. a dust shield; 5. a humidifying ring; 6. a bi-directional motor; 7. a fan blade; 8. a first water pipe; 9. an air quality sensor; 10. a fixed seat; 11. a ventilation seat; 12. a fixing plate; 13. a rain sensor; 14. a storage battery; 15. a single chip microcomputer; 16. a ventilation air passage; 17. a solar panel; 18. a partition plate; 19. a water tank; 20. an electric telescopic rod; 21. fixing the bolt; 22. a liquid level sensor; 23. a first water pump; 24. a second water pump; 25. a second water pipe; 26. an electromagnetic valve; 27. an air tank; 28. a dust blocking net; 29. filtering the plate; 30. a water collection tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides an embodiment: a building energy-saving ventilation device comprises a ventilation box 1, fixing seats 10 and ventilation seats 11, wherein the fixing seats 10 are uniformly arranged at two ends of the ventilation box 1, fixing bolts 21 are respectively arranged between the two fixing seats 10 at the same end, fixing holes matched with the fixing bolts 21 are uniformly formed in the fixing seats 10, the ventilation box 1 forms a fixed disassembly and assembly structure through the fixing seats 10 and the fixing bolts 21, the ventilation box 1 is conveniently and fixedly installed through the fixing seats 10 and the fixing bolts 21 and is conveniently fixed on a building wall, the device is convenient to use, the ventilation seat 11 is arranged in the center of the interior of the ventilation box 1, a dust cover 4 is detachably arranged at one side of the ventilation seat 11 through a fixing fixture block 3, a fixing groove matched with the fixing fixture block 3 is arranged at one side of the ventilation seat 11, a fixed disassembly and assembly structure is formed between the dust cover 4 and the ventilation seat 11 through the fixing fixture block 3, and the fixed disassembly and assembly between the dust cover 4, the dust hood 4 is convenient to disassemble and clean, dust is convenient to isolate through the dust hood 4, the device is convenient to use, a partition plate 18 is installed in the center of the inside of a ventilation seat 11, a storage battery 14 and a single chip microcomputer 15 are installed AT one end of the inside of the ventilation seat 11 on one side of the partition plate 18 respectively, the type of the single chip microcomputer 15 can be an AT89S51 single chip microcomputer, the storage battery 14 is electrically connected with the single chip microcomputer 15 through a lead, a two-way motor 6 is installed in the center of the inside of the ventilation seat 11 on one side of the partition plate 18, the type of the two-way motor 6 can be a KTYZ two-way motor, the two-way motor 6 is electrically connected with the single chip microcomputer 15 through a lead, the output end of the two-way motor 6 extends to the other side of the partition plate 18 and is provided with a fan blade 7, ventilation air passages 16 are respectively arranged in the insides of the ventilation seats 11 on both sides of the, the output end of the liquid level sensor 22 is electrically connected with the input end of the singlechip 15, the two ends of the bottom in the water tank 19 are respectively provided with a first water pump 23 and a second water pump 24, the first water pump 23 and the second water pump 24 are both electrically connected with the singlechip 15 through leads, one side of the ventilation seat 11 between the dust hood 4 and the fan blade 7 is provided with a humidifying ring 5, one side of the humidifying ring 5 close to the dust hood 4 is uniformly provided with an atomizing nozzle, so that water injected into the humidifying ring 5 is atomized by the atomizing nozzle and blown into the air, so that the humidity in the air is increased when the air in the building is too dry, the comfort level of the environment is increased, the device is convenient to use, one end of the humidifying ring 5 is provided with a first water pipe 8, one end of the first water pipe 8 extends into the water tank 19 and is fixedly connected with the output end of the first water pump 23, and the ventilation boxes 1 at the two ends of the dust hood 4 are respectively provided with a humidity sensor, the type of the humidity sensor 2 can be DHT11 humidity sensor, the type of the air quality sensor 9 can be TGS2600 air quality sensor, the output ends of the humidity sensor 2 and the air quality sensor 9 are both electrically connected with the input end of the single chip microcomputer 15, one side of the ventilation box 1, which is far away from the dust hood 4, is hinged with the fixed plate 12, the two ends of the lower part of the water tank 19, which is communicated with the inside of the ventilation box 1, are both provided with the electric telescopic rods 20, the output ends of the electric telescopic rods 20 are both hinged and fixed with the bottom of the fixed plate 12, the center of the fixed plate 12 is uniformly provided with the air grooves 27, one end of the inside of the air grooves 27, which is close to the fixed plate 12, is provided with the dust blocking net 28, the ventilation air passages 16 and the air grooves 27 are in the same horizontal plane, so that air can enter and exit through the ventilation, the device is convenient to use, the fixing plates 12 on two sides of the air groove 27 are uniformly provided with the solar cell panels 17, the solar cell panels 17 are electrically connected with the storage battery 14 through a photovoltaic controller, the top of one side of the fixing plate 12, which is far away from the ventilation seat 11, is provided with the rainwater sensor 13, the type of the rainwater sensor 13 can be a RY-YX rainwater sensor, the output end of the rainwater sensor 13 is electrically connected with the input end of the singlechip 15, the bottom of the fixing plate 12 is provided with the water collecting groove 30, the top of the water collecting groove 30 is provided with the filter plate 29, the fixing plate 12 on one side of the water collecting groove 30 is internally provided with the second water pipe 25, one end of the second water pipe 25 is fixedly connected with the input end of the second water pump 24, the first water pipe 8 and the second water pipe 25 are both provided with the electromagnetic valves 26, the electromagnetic valves 26 are electrically connected with the singlechip 15 through wires, so as, be convenient for collect the rainwater through water catch bowl 30 and pour into the water tank 19 inside, be convenient for pour into the rainwater into humidification ring 5 inside through water tank 19 and carry out the humidification to the environment, the use of the device of being convenient for.
The working principle is as follows: when the device is used, firstly, the ventilation box 1 is fixed on a wall body needing ventilation of a building through the fixing seat 10 and the fixing bolt 21, an external power supply is connected, the electric telescopic rod 20 stretches and retracts to drive the fixing plate 12 to rotate, the fixing plate 12 and the ventilation box 1 form a certain included angle, the solar cell panel 17 absorbs solar energy and converts the solar energy into electric energy to be stored in the storage battery 14, a standby power supply is provided for the device, the energy consumption of the device is convenient to reduce, the energy saving performance of the device is convenient to increase, when the air quality sensor 9 senses poor air quality inside the building or the humidity sensor 2 senses excessive air humidity inside the building, the bidirectional motor 6 rotates forwards, air inside the building is drawn out through the ventilation air passage 16, the ventilation performance inside the building is convenient to increase, the air inside the building is convenient to dehumidify, the device is convenient to use, when in rain weather, the rain sensor 13 senses, so that the single chip microcomputer 15 controls the electric telescopic rod 20 to contract, the fixing plate 12 is driven to be retracted, rainwater is prevented from entering the interior of a building, the rainwater falls into the water collecting tank 30 along the fixing plate 12, the electromagnetic valve 26 on the second water pipe 25 is opened, the second water pump 24 pumps the rainwater into the water tank 19 for storage, when the collected rainwater reaches the position of the liquid level sensor 22, the liquid level sensor 22 transmits a signal to the single chip microcomputer 15, the single chip microcomputer 15 controls the electromagnetic valve 26 on the second water pipe 25 to be closed, the rainwater collection is completed, when air in the interior of the building is too dry, the humidity sensor 2 transmits the signal to the single chip microcomputer 15, the single chip microcomputer 15 controls the electromagnetic valve 26 on the first water pipe 8 to be opened, the first water pump 23 pumps the rainwater in the water tank 19 into the humidifying ring 5, and the water injected into the humidifying ring, and control two-way motor 6 antiport for two-way motor 6 drives flabellum 7 and blows in the air of building inside with the moisture, is convenient for increase the humidity in the air of building inside, is convenient for increase the comfort level of environment, is convenient for the use of device.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides an energy-conserving ventilation unit of building, includes ventilation case (1), fixing base (10) and ventilation seat (11), its characterized in that: fixing bases (10) are evenly installed at two ends of the ventilation box (1), a fixing bolt (21) is installed between the two fixing bases (10) at the same end, a ventilation seat (11) is installed at the center of the interior of the ventilation box (1), a dust hood (4) is detachably installed on one side of the ventilation seat (11) through a fixing clamping block (3), a partition plate (18) is installed at the center of the interior of the ventilation seat (11), a storage battery (14) and a single chip microcomputer (15) are installed at one end of the interior of the ventilation seat (11) on one side of the partition plate (18) respectively, the storage battery (14) is electrically connected with the single chip microcomputer (15) through a wire, a two-way motor (6) is installed at the center of the interior of the ventilation seat (11) on one side of the partition plate (18), the two-way motor (6) is electrically connected with the single chip microcomputer (15) through, the two-way motor (6) is characterized in that ventilation air passages (16) are arranged inside the ventilation seats (11) on two sides, a water tank (19) is arranged at the other end inside the ventilation seat (11) on one side of the partition plate (18), a liquid level sensor (22) is arranged on one side inside the water tank (19), the output end of the liquid level sensor (22) is electrically connected with the input end of the single chip microcomputer (15), a first water pump (23) and a second water pump (24) are respectively arranged at two ends of the bottom in the water tank (19), the first water pump (23) and the second water pump (24) are electrically connected with the single chip microcomputer (15) through leads, a humidifying ring (5) is arranged on one side of the ventilation seat (11) between the dust hood (4) and the fan blades (7), a first water pipe (8) is arranged at one end of the humidifying ring (5), one end of the first water pipe (8) extends to the inside of the water tank (19) and is fixedly, and the ventilating boxes (1) at the two ends of the dust hood (4) are respectively provided with a humidity sensor (2) and an air quality sensor (9), the output ends of the humidity sensor (2) and the air quality sensor (9) are electrically connected with the input end of the single chip microcomputer (15), one side of the ventilating box (1) far away from the dust hood (4) is hinged with a fixed plate (12), two ends of the inside of the ventilating box (1) below the water tank (19) are respectively provided with an electric telescopic rod (20), the output end of the electric telescopic rod (20) is hinged and fixed with the bottom of the fixed plate (12), the center of the fixed plate (12) is uniformly provided with an air groove (27), one end of the inside of the air groove (27) close to the fixed plate (12) is respectively provided with a dust blocking net (28), the fixed plates (12) at the two sides of the air groove (27) are respectively and are respectively provided with a solar cell panel (17), and the solar cell panel (17, and fixed plate (12) keep away from the top of ventilation seat (11) one side and install rain sensor (13), the output of rain sensor (13) and the input electric connection of singlechip (15), the bottom of fixed plate (12) is equipped with water catch bowl (30), and filter plate (29) are installed at the top of water catch bowl (30), and fixed plate (12) internally mounted of water catch bowl (30) one side has second water pipe (25), the one end of second water pipe (25) and the input fixed connection of second water pump (24).
2. The energy-saving ventilating device for buildings as claimed in claim 1, wherein: and one side of the humidifying ring (5) close to the dust shield (4) is uniformly provided with atomizing nozzles.
3. The energy-saving ventilating device for buildings as claimed in claim 1, wherein: and the first water pipe (8) and the second water pipe (25) are both provided with electromagnetic valves (26), and the electromagnetic valves (26) are electrically connected with the singlechip (15) through leads.
4. The energy-saving ventilating device for buildings as claimed in claim 1, wherein: the ventilation box is characterized in that fixing holes matched with the fixing bolts (21) are uniformly formed in the fixing seat (10), and the ventilation box (1) forms a fixed dismounting structure through the fixing seat (10) and the fixing bolts (21).
5. The energy-saving ventilating device for buildings as claimed in claim 1, wherein: one side of the ventilation seat (11) is provided with a fixing groove matched with the fixing clamping block (3), and a fixed dismounting structure is formed between the dust hood (4) and the ventilation seat (11) through the fixing clamping block (3).
6. The energy-saving ventilating device for buildings as claimed in claim 1, wherein: the ventilation air channel (16) and the air groove (27) are in the same horizontal plane.
CN201921571357.XU 2019-09-20 2019-09-20 Building energy-saving ventilation device Expired - Fee Related CN211041247U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921571357.XU CN211041247U (en) 2019-09-20 2019-09-20 Building energy-saving ventilation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921571357.XU CN211041247U (en) 2019-09-20 2019-09-20 Building energy-saving ventilation device

Publications (1)

Publication Number Publication Date
CN211041247U true CN211041247U (en) 2020-07-17

Family

ID=71538275

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921571357.XU Expired - Fee Related CN211041247U (en) 2019-09-20 2019-09-20 Building energy-saving ventilation device

Country Status (1)

Country Link
CN (1) CN211041247U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112325400A (en) * 2020-10-29 2021-02-05 武昌理工学院 Ventilation and heat dissipation device for building energy conservation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112325400A (en) * 2020-10-29 2021-02-05 武昌理工学院 Ventilation and heat dissipation device for building energy conservation

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Granted publication date: 20200717

Termination date: 20200920