CN213599522U - Green building with ventilation economizer system - Google Patents
Green building with ventilation economizer system Download PDFInfo
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- CN213599522U CN213599522U CN202022444500.8U CN202022444500U CN213599522U CN 213599522 U CN213599522 U CN 213599522U CN 202022444500 U CN202022444500 U CN 202022444500U CN 213599522 U CN213599522 U CN 213599522U
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- 238000009423 ventilation Methods 0.000 title claims abstract description 37
- 239000002699 waste material Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 10
- 230000003749 cleanliness Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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Abstract
The utility model relates to a green building with ventilation economizer system, the field of green building is related to, it includes building body, the last ventilation system that is provided with of building body, ventilation system includes the air-supply line, go out the tuber pipe, it communicates in building body one side to go out the tuber pipe, it is provided with the exhaust fan to go out the tuber pipe, the air-supply line is including being responsible for, be responsible for and keep away from out tuber pipe one side in building body, be responsible for and communicate in being responsible for one side, be responsible for intraductal the air-supply line that is provided with, be responsible for and be provided with air flow meter, air flow meter and. This application has the effect of the waste of the reduction energy.
Description
Technical Field
The application relates to the field of green buildings, in particular to a green building with a ventilation energy-saving system.
Background
The green building refers to a building which can save resources to the maximum extent within the whole life cycle of the building, comprises the functions of saving energy, land, water, materials and the like, protects the environment, reduces pollution, provides healthy, comfortable and efficient use space for people, and is harmonious with the nature.
The existing green building mostly adopts a mechanical ventilation mode in ventilation, namely, a draught fan is utilized to absorb air from the outside and introduce the air into the building, and then an exhaust fan is utilized to exhaust the air in the building to the outside.
In view of the related art as described above, the inventors consider that there is a problem of energy waste.
SUMMERY OF THE UTILITY MODEL
In order to reduce the waste of energy, the application provides a green building with a ventilation energy-saving system.
The application provides a green building with ventilation economizer system adopts following technical scheme:
the utility model provides a green building with ventilation economizer system, including building body, the last ventilation system that is provided with of building body, ventilation system includes the air-supply line, go out the tuber pipe and communicate in building body one side, go out the intraductal exhaust fan that is provided with of tuber, the air-supply line is including being responsible for, divide the pipe, be responsible for and communicate in building body and keep away from a tuber pipe one side, divide the pipe to communicate in being responsible for one side, be provided with the air-supply line in the branch pipe, be responsible for and be provided with air flow meter, air flow meter and fan electric.
By adopting the technical scheme, when the interior of the building body needs to be ventilated, the door plate is opened, the power is supplied to the air inlet fan, the exhaust fan is started, external natural air enters the main pipe, the air flow meter determines that if the flow rate of the air in the main pipe is greater than a set value, the external air enters the building body along the main pipe, and then the air in the building body is exhausted out of the building body from the exhaust pipe, so that the air circulation inside and outside the building body is enhanced; if the air flow meter detects that the air flow rate in the main pipe is less than a set value, the air flow meter transmits an electric signal to the air inlet fan, the air inlet fan is started to suck air in the external environment into the branch pipes, the air in the branch pipes enters the main pipe and then enters the building body through the main pipe, and the air in the building body is exhausted out of the building body through the exhaust pipes to enhance the air circulation inside and outside the building body; when external wind power is enough, the air inlet machine is in an out-of-operation state, the wind power of natural wind is relied on to realize conveying air in the building body, and only when external wind power is less, and is not enough to meet the needs of taking a breath in the building body, the air inlet machine just can start, reduces the operating time of air inlet machine to reduce the consumption of air inlet machine during operation electric energy, be favorable to reducing the waste of the energy.
When ventilation is not needed in the building body, the door plate is in a closed state, so that the building body forms an environment which is relatively sealed, the probability that the external environment enters the building body along the main pipe when ventilation is not needed is reduced, the heat exchange between the interior of the building body and the outside is reduced, the use of refrigeration or heating equipment in the building body is reduced, and the energy waste is reduced; meanwhile, the external impurities can be prevented from entering the main pipe.
Optionally, door plant sliding connection is in being responsible for, is provided with the gliding drive assembly of drive door plant on the door plant, and drive assembly includes lead screw, connecting block, and the lead screw rotates to be connected in being responsible for, and lead screw axis of rotation is on a parallel with door plant sliding direction, and connecting block fixed connection keeps away from building body one side in the door plant, and lead screw threaded connection is in the connecting block.
By adopting the technical scheme, when ventilation is needed, the screw rod is driven to rotate, the screw rod rotates to drive the connecting block to move on the screw rod, and the connecting block moves to drive the door panel to move, so that the door panel is opened; after ventilation is completed, the screw rod is driven to rotate, so that the door plate returns, the door plate is closed, and the door plate is convenient to open and close.
Optionally, a main filter box is arranged in the main pipe, and a branch filter box is arranged in the branch pipe.
By adopting the technical scheme, some impurities exist in the air of the external environment, the air entering from the main pipe enters the building body after being filtered by the main filter box, the air entering from the branch pipe enters the main pipe after being filtered by the branch filter box, and then enters the building body, so that the content of the impurities in the air entering the building body can be reduced, the cleanliness of the air entering the building body is improved, and the improvement of the life quality of people is facilitated; meanwhile, the use of air purifiers in the building body can be reduced, and the waste of energy sources is reduced.
Optionally, the filter dividing box is located on one side of the air inlet machine, which is far away from the main pipe.
Through adopting above-mentioned technical scheme, the air inlet machine starts the back, make to divide intraductal great suction that produces from outside to inside, can adsorb some impurity that the volume is great relatively in the air, divide the filter cartridge to be located the air inlet machine and keep away from one side of being responsible for, make the outside air that gets into to divide the pipe just can contact with the air inlet machine after dividing the filter cartridge filtration earlier, reduce the probability that impurity that contains in the air and air inlet machine contacted, avoid too much impurity to pile up on the air inlet machine and influence the normal work of air inlet machine and even cause the air inlet machine to damage, reduce the probability that the air inlet machine damaged, thereby reduce the probability that the air inlet machine maintained and changed, be favorable to reducing the waste of the energy.
Optionally, the main filter box is located at a side of the communicating position of the main pipe and the branch pipe, which is far away from the door panel.
By adopting the technical scheme, the air entering from the branch pipe under the action of the air inlet machine firstly enters the main pipe after being filtered by the branch filter box and then enters the building body after being filtered by the main filter box, and the air entering from the branch pipe is subjected to secondary filtration, so that the cleanliness of the air entering the building body is further improved.
Optionally, the branch filter boxes are far away from the side surface of the air inlet fan, and gradually get away from the air inlet fan along a direction close to the middle part of the branch filter boxes from a plane where the branch pipes are far away from the side surface of the main pipe.
Through adopting above-mentioned technical scheme, can have some great materials like leaf etc. among the external environment, these materials can not be through dividing the filter cartridge, divide the filter cartridge to be located and divide a tub mouth department, can block that external material gets into to divide intraductally for some impurity are located and divide the filter cartridge surface, then leave along with the effect of external wind power and divide the filter cartridge, divide the filter cartridge surface to be by the shape that the edge inclines gradually in center in addition, make debris more difficult to divide the filter cartridge surface to reserve.
Optionally, divide filter cartridge sliding connection in to be in charge, divide filter cartridge sliding direction to be on a parallel with and be in charge of the interior wind flow direction, divide the intraductal wall of pipe to have seted up the spout, the spout is kept away from in charge side face from being in charge and is begun to extend, divide fixedly connected with slider on the filter cartridge, the slider is located the spout.
Through adopting above-mentioned technical scheme, because divide the filter cassette to be in for a long time under the state with external environment contact, then divide the filter cassette to be contaminated more easily, so divide the filter cassette to need often change, when needing to be changed and divide the filter cassette, to keeping away from the branch pipe direction pulling branch filter cassette, will divide the filter cassette to take out in the branch pipe, change for new branch filter cassette, reduce and divide the filter cassette surface to deposit and block up branch filter cassette because of impurity to the reduction leads to the fact the flow of the intraductal air of branch to reduce because of dividing the filter cassette to block up.
Optionally, one side of the sub-filter box, which is far away from the air inlet machine, is fixedly connected with a handle.
By adopting the technical scheme, when the filter box is taken out, the filter box can be pulled by the handle, so that the force is applied to the filter box more easily, and the filter box is taken out more conveniently.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the main pipe and the branch pipes are arranged, the air flow meter is arranged in the main pipe, and the air inlet machine is arranged in the branch pipes, so that the air inlet machine does not need to be started when the external wind power is large, the external air is provided for the building body by means of self-heating wind power, the working time of the air inlet machine is reduced, and the energy waste caused by the working of the air inlet machine is reduced;
2. the cleanliness of air entering the building body is improved by arranging the main filter box and the sub filter boxes;
3. the side surface of the sub-filter box far away from the air inlet machine is inclined outwards from the middle part, so that the probability of air pipe blockage caused by the fact that external substances enter the sub-pipe is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is a sectional view showing the inside of the main pipe in the present embodiment;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is a schematic diagram showing the structure of the driving assembly.
Description of reference numerals: 1. a building body; 2. a ventilation system; 21. an air inlet pipe; 211. a main pipe; 2111. an air flow meter; 2112. a door panel; 2113. a main filter cartridge; 212. pipe distribution; 2121. an air inlet machine; 2122. a separating and filtering box; 2123. a chute; 2124. a slider; 2125. a handle; 2126. a rain cap; 2127. a connecting rod; 22. an air outlet pipe; 221. an exhaust fan; 3. a drive assembly; 31. a lead screw; 311. a motor; 32. connecting blocks; 321. a guide rod.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a green building with a ventilation energy-saving system. Referring to fig. 1 and 2, a green building with a ventilation energy-saving system includes a building body 1, a ventilation system 2 is arranged on the building body 1, the ventilation system 2 includes an air inlet pipe 21 and an air outlet pipe 22, the air outlet pipe 22 is communicated with one side of the building body 1, an exhaust fan 221 is arranged in the air outlet pipe 22, the air inlet pipe 21 includes a main pipe 211 and branch pipes 212, the main pipe 211 is communicated with one side of the main pipe 211, an air inlet fan 2121 is arranged in the branch pipes 212, an air flow meter 2111 is arranged in the main pipe 211, and the air flow meter 2111 is electrically connected with the fan. The working time of the air inlet fan 2121 can be reduced, thereby reducing the energy waste caused by the working of the air inlet fan 2121.
Referring to fig. 2 and 3, the air flow meter 2111 is a common plug-in electromagnetic flow meter, the air flow meter 2111 is fixedly connected to the inner wall of the main pipe 211, and the air flow meter 2111 is electrically connected to the controller of the air inlet fan 2121; when ventilation needs to be performed in the building body 1, the exhaust fan 221 is started, the air inlet fan 2121 is electrified, external natural air enters the main pipe 211, the air flow meter 2111 measures the air flow rate in the main pipe 211, if the air flow meter 2111 detects that the air flow rate in the main pipe 211 is smaller than a set value, the air flow meter 2111 transmits an electric signal to a controller of the air inlet fan 2121, the air inlet fan 2121 is started, air in the external environment is sucked into the branch pipe 212, the air in the branch pipe 212 enters the main pipe 211, and then enters the building body 1 through the main pipe 211; if the air flow meter 2111 detects that the flow velocity in the main pipe 211 is not less than the set value, a start signal is not transmitted to the controller of the air inlet fan 2121, natural wind enters the building body 1 through the main pipe 211 under the action of the self wind force, air in the building body 1 is exhausted out of the building body 1 through an exhaust pipe, and after ventilation is completed, the exhaust fan 221 is closed and the air inlet fan 2121 is powered off; when the external wind is strong, the air inlet fan 2121 is not started, and external air is supplied into the building body 1 by self-heating wind, so that the working time of the air inlet fan 2121 is reduced, and the energy waste caused by the working of the air inlet fan 2121 is reduced.
Referring to fig. 1 and 4, be responsible for 211 square pipe, be responsible for 211 mouth of pipe department and be provided with door plant 2112, door plant 2112 can cover the person in charge 211 mouth of pipe completely, the vertical sliding connection of door plant 2112 is in being responsible for 211, be provided with the gliding drive assembly 3 of drive door plant 2112 on the door plant 2112, drive assembly 3 includes lead screw 31, connecting block 32, lead screw 31 rotates to be connected in being responsible for 211, be provided with drive lead screw 31 pivoted motor 311 on the lead screw 31, and lead screw 31 axis of rotation is vertical, lead screw 31 is located the vertical lateral wall department of being responsible for 211, connecting block 32 fixed connection is in door plant 2112 and is kept away from being responsible for 211 one side, connecting block 32 is located door. The motor 311 is started, the motor 311 drives the screw rod 31 to rotate, the screw rod 31 rotates to drive the connecting block 32 to move along the screw rod 31, and the connecting block 32 drives the door plate 2112 to ascend or descend so as to open and close the door plate 2112; when ventilation is not needed, the door plate 2112 is in a closed state, so that the probability that the main pipe 211 is blocked by external substances entering the main pipe 211 is reduced, meanwhile, a relatively more sealed space can be formed by the building body 1, the heat exchange inside and outside the building body 1 is reduced, and the waste of energy is reduced; when ventilation is required, the motor 311 is started to open the door plate 2112.
Referring to fig. 4, the pipe orifice of the main pipe 211 is far away from one side of the screw rod 31 and is fixedly connected with a guide rod 321 parallel to the screw rod 31, the connecting block 32 is vertically connected to the guide rod 321 in a sliding manner, the guide rod 321 is matched with the screw rod 31, the moving direction of the connecting plate can be limited, and the connecting plate is guaranteed to move vertically.
Referring to fig. 2 and 3, the branch pipe 212 is located above the main pipe 211, the branch pipe 212 extends vertically upward, a branch filter box 2122 is arranged in the branch pipe 212, activated carbon is placed in the branch filter box 2122, the branch filter box 2122 is arranged at the nozzle of the branch pipe 212, the side surface of the branch filter box 2122, which is far away from the air inlet fan 2121, is gradually far away from the air inlet fan 2121 from the plane where the side surface of the branch pipe 212, which is far away from the main pipe 211, is located along the direction close to the middle of the branch filter box 2122, that is, the top surface of the branch filter box 2122 forms a shape gradually inclining downward from. The sub-filter boxes 2122 are arranged at the pipe orifices of the sub-pipes 212, so that the probability that external large impurities enter the sub-pipes 212 can be reduced, the probability that the sub-pipes 212 are blocked is reduced, and the top surfaces of the sub-filter boxes 2122 are inclined, so that the external large impurities are not easy to remain on the surfaces of the sub-filter boxes 2122, and the probability that the sub-filter boxes 2122 are blocked is reduced.
Referring to fig. 3, the sub-filter cartridge 2122 is exposed to the external environment for a long time and needs to be replaced frequently. The sub-filter cartridge 2122 is vertically and slidably connected to the branch pipe 212, a sliding groove 2123 is formed in the inner wall of the branch pipe 212, the sliding groove 2123 extends from the side surface of the branch pipe 212 away from the main pipe 211, when the sub-filter cartridge 2122 is placed in the branch pipe 212, the bottom of the sliding block 2124 abuts against the inner wall of the sliding groove 2123, the sliding block 2124 is fixedly connected to the sub-filter cartridge 2122, the sliding block 2124 is located in the sliding groove 2123, and the handle 2125 is fixedly connected to the top of the sub-filter cartridge 2122; when the filter cartridge needs to be replaced, the handle 2125 is held by hand, and the filter cartridge 2122 is pulled upward to be drawn out from the branched tube 212 and replaced with a new filter cartridge 2122.
Referring to fig. 1, a rain hat 2126 is arranged at the top of the branch pipe 212, a connecting rod 2127 is fixedly connected to the branch pipe 212, the connecting rod 2127 is fixedly connected to the rain hat 2126, and the rain hat 2126 can prevent rain water from entering the branch pipe 212, so that the damage of the rain water and the air inlet fan 2121 is reduced; the two connecting rods 2127 are arranged, and the two connecting rods 2127 are symmetrical with respect to the center of the tube opening of the branch tube 212, so that the situation that the branch filter box 2122 cannot be taken out due to too close distance between the two connecting rods 2127 is avoided.
Referring to fig. 3, a main filter box 2113 is placed in the main pipe 211, the main filter box 2113 is located at a position where the main pipe 211 is communicated with the branch pipe 212, and the main filter box 2113 is far away from the door plate 2112, and the main filter box 2113 filters natural air entering the building body 1 through the main pipe 211, and can also perform secondary filtration on air entering the main pipe 211 through the branch pipe 212, which is beneficial to improving the cleanliness of the air entering the building body 1.
The implementation principle of the green building with the ventilation energy-saving system in the embodiment of the application is as follows: when the building body 1 is not ventilated, the door plate 2112 covers the pipe orifice of the main pipe 211; when the interior of the building body 1 needs to be ventilated, the motor 311 is started, the exhaust fan 221 is started, and the air inlet fan 2121 is electrified; the motor 311 drives the screw rod 31 to rotate, the screw rod 31 rotates to drive the door plate 2112 to ascend through the connecting block 32, external natural wind enters the main pipe 211, if the air flow meter 2111 detects that the air flow rate in the main pipe 211 is smaller than a set value, a starting signal is transmitted to an air device of the air inlet fan 2121, the air inlet fan 2121 is started, so that the external air enters the branch pipe 212 after being filtered by the branch filter box 2122, the air in the branch pipe 212 enters the main pipe 211, and the air enters the building body 1 after being secondarily filtered by the main filter box 2113; if the air flow meter 2111 detects that the air flow rate in the main pipe 211 is not less than the set value, no start signal is transmitted to the air inlet fan 2121, and the air in the main pipe 211 enters the building body 1 after being filtered by the main filter box 2113; the air in the building body 1 is exhausted out of the building body 1 through an exhaust pipe under the action of an exhaust fan 221; when the external natural wind power is large, the air inlet fan 2121 is in an inoperative state, external air is supplied into the building body 1 by means of the wind power of natural wind, and when the external natural wind power is small, the air inlet fan 2121 is started to suck the external air into the building body 1, so that the working time of the air inlet fan 2121 is reduced, and the energy waste when the air inlet fan 2121 works is reduced; after ventilation is complete, exhaust fan 221 is turned off, air inlet fan 2121 is de-energized, and motor 311 is started to reposition door 2112.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A green building with ventilation economizer system which characterized in that: including building body (1), be provided with ventilation system (2) on building body (1), ventilation system (2) include air-supply line (21), go out tuber pipe (22), it communicates in building body (1) one side to go out tuber pipe (22), be provided with exhaust fan (221) in going out tuber pipe (22), air-supply line (21) are including being responsible for (211), be responsible for (212), be responsible for (211) and communicate in building body (1) and keep away from out tuber pipe (22) one side, be responsible for (212) and communicate in being responsible for (211) one side, be provided with air-supply line (2121) in being responsible for (212), be provided with air flow meter (2111) in being responsible for (211), air flow meter (2111) and fan electric connection, be responsible for (211) mouth of pipe department and be provided with door plant (211.
2. A green building with a ventilation and energy saving system according to claim 1, characterized in that: door plant (2112) sliding connection is in being responsible for (211), be provided with on door plant (2112) and drive gliding drive assembly (3) of door plant (2112), drive assembly (3) are including lead screw (31), connecting block (32), lead screw (31) rotate to be connected in being responsible for (211), lead screw (31) axis of rotation is on a parallel with door plant (2112) sliding direction, building body (1) one side is kept away from in door plant (2112) fixed connection in connecting block (32), lead screw (31) threaded connection is in connecting block (32).
3. A green building with a ventilation and energy saving system according to claim 1, characterized in that: a main filter box (2113) is arranged in the main pipe (211), and a branch filter box (2122) is arranged in the branch pipe (212).
4. A green building with a ventilation and energy saving system according to claim 3, characterized in that: the sub-filter box (2122) is positioned on one side of the air inlet machine (2121) far away from the main pipe (211).
5. A green building with a ventilation and energy saving system according to claim 3, characterized in that: the main filter box (2113) is positioned on one side, away from the door plate (2112), of the communication position of the main pipe (211) and the branch pipe (212).
6. A green building with a ventilation energy-saving system according to claim 4, characterized in that: the side surface of the sub-filter box (2122) far away from the air inlet fan (2121) gradually gets away from the air inlet fan (2121) along the direction close to the middle part of the sub-filter box (2122) from the plane of the side surface of the sub-pipe (212) far away from the main pipe (211).
7. A green building with a ventilation energy-saving system according to claim 6, characterized in that: the branch filter cartridge (2122) is connected to the branch pipe (212) in a sliding mode, the sliding direction of the branch filter cartridge (2122) is parallel to the air flowing direction in the branch pipe (212), a sliding groove (2123) is formed in the inner wall of the branch pipe (212), the sliding groove (2123) extends from the side face, away from the main pipe (211), of the branch pipe (212), a sliding block (2124) is fixedly connected to the branch filter cartridge (2122), and the sliding block (2124) is located in the sliding groove (2123).
8. A green building with a ventilation energy-saving system according to claim 7, characterized in that: and one side of the sub-filter box (2122) far away from the air inlet machine (2121) is fixedly connected with a handle (2125).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022444500.8U CN213599522U (en) | 2020-10-28 | 2020-10-28 | Green building with ventilation economizer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022444500.8U CN213599522U (en) | 2020-10-28 | 2020-10-28 | Green building with ventilation economizer system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213599522U true CN213599522U (en) | 2021-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022444500.8U Expired - Fee Related CN213599522U (en) | 2020-10-28 | 2020-10-28 | Green building with ventilation economizer system |
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| Country | Link |
|---|---|
| CN (1) | CN213599522U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757834A (en) * | 2021-09-17 | 2021-12-07 | 江苏鑫亚环境集团有限公司 | Plug-in quick-assembly clean operating room and installation process thereof |
| CN114353230A (en) * | 2022-01-25 | 2022-04-15 | 南京玖沐机电科技有限公司 | Energy-saving ventilation unit for green building |
-
2020
- 2020-10-28 CN CN202022444500.8U patent/CN213599522U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757834A (en) * | 2021-09-17 | 2021-12-07 | 江苏鑫亚环境集团有限公司 | Plug-in quick-assembly clean operating room and installation process thereof |
| CN114353230A (en) * | 2022-01-25 | 2022-04-15 | 南京玖沐机电科技有限公司 | Energy-saving ventilation unit for green building |
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Granted publication date: 20210702 |