CN2775525Y - Carbon monoxide concentration controller for inducing fan without air pipe for underground garage - Google Patents
Carbon monoxide concentration controller for inducing fan without air pipe for underground garage Download PDFInfo
- Publication number
- CN2775525Y CN2775525Y CN 200420064689 CN200420064689U CN2775525Y CN 2775525 Y CN2775525 Y CN 2775525Y CN 200420064689 CN200420064689 CN 200420064689 CN 200420064689 U CN200420064689 U CN 200420064689U CN 2775525 Y CN2775525 Y CN 2775525Y
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Abstract
The utility model relates to a carbon monoxide concentration control device used for an inducing fan without an air pipe of an underground garage and belongs to the technical field of building heating and ventilating air conditioners. The utility model comprises a sensor used for detecting carbon monoxide concentration, which is connected with a single-chip microcomputer, a circuit of the single-chip microcomputer, which is used for processing sensor signals, a status indicator lamp of a keyboard, a communication circuit which is connected with the single-chip microcomputer, a relay used for executing control signals, a contactor used for executing the control signals, an inducing fan without a pipe, which operates under the control of the contactor and a power source used for supplying electricity for the control device, wherein the circuit of the single-chip microcomputer is connected with the sensor, the communication circuit and the power source; a master-controlled supervisory computer and a relay, the relay is connected with the communication circuit; the contactor is connected with the inducing fan without a pipe; the inducing fan without a pipe is connected with the contactor; the power source is connected with the single-chip microcomputer. The height of an underground garage is lowered, and the building investment of the garage is saved by the device; a ventilating system is designed simply, the control effect of the carbon monoxide concentration in the underground garage is good and energy consumption is small.
Description
Technical field
The utility model relates to a kind of carbonomonoxide concentration control device that underground garage does not have the airduct Induced fan that is used for, and belongs to building and heating and air conditioner technical field.
Background technology
Adopt of underground garage has the pipe ventilating system more at present, and its main weak point requires the garage floor height higher exactly, and this just makes the construction investment in garage strengthen, and improved consumer's parking charge and used.Someone proposes not have the airduct ventilating system, promptly sets up many typhoons machine in the garage separately, and the carbonomonoxide concentration startup blower fan according to diverse location in the garage can save ventilating system like this, thereby reduce the construction investment in garage.But existing no airduct ventilating system all is the control by manually starting shooting and shutting down, and this mode of operation is to the control weak effect of garage carbonomonoxide concentration, and energy consumption is big, inefficiency.
Summary of the invention
The purpose of this utility model is to propose a kind of carbonomonoxide concentration control device that underground garage does not have the airduct Induced fan that is used for, by carbonomonoxide concentration in the automatic detection underground garage, control no airduct induction fan system, so that control the carbonomonoxide concentration in the underground parking garage effectively, guarantee good air ambient and safety in the underground parking garage.
What the utility model proposes is used for the carbonomonoxide concentration control device that underground garage does not have the airduct Induced fan, comprising:
(1) be used to survey the sensor of carbonomonoxide concentration, sensor is connected with single-chip microcomputer;
(2) be used for the sensor signal is carried out the single chip circuit of A/D conversion, digital filtering, data processing, temperature and address code input and signal controlling, be connected with power supply with sensor, keyboard state indicator lamp, the communicating circuit of carbonomonoxide concentration;
(3) be used to connect the telecommunication circuit of single-chip microcomputer and relay, telecommunication circuit links to each other with single-chip microcomputer, master control host computer and each relay;
(4) be used to carry out the relay and the contactor of the control signal that single-chip microcomputer sends by telecommunication circuit, relay is connected with contactor, and relay is connected with telecommunication circuit, contactor with do not have the pipe Induced fan and be connected;
(5) be used for the no airduct Induced fan that under the control of contactor, turns round, do not have the pipe Induced fan and be connected with contactor;
(6) power supply that is used to control device to power, power supply is connected with single-chip microcomputer.
Single chip circuit in the said apparatus comprises:
(1) is used for the single-chip microcomputer U5 that A/D conversion, digital filtering and data are handled;
(2) be used for resistance R 7 to the light emitting diode current limliting, an end of resistance is connected with temperature sensor;
(3) be used to make the luminous light emitting diode D2 of indicator lamp on the control panel, an end of light emitting diode links to each other with power supply by resistance R 7, and the other end links to each other with the P1.7 of single-chip microcomputer;
(4) be used for constituting the concussion loop with crystal oscillator U4, to produce the capacitor C 4 and the C5 of pulse signal, capacitor C 4 and C5 are parallel to the two ends of crystal oscillator U4;
(5) be used for power filter, improve the capacitor C 8 of single-chip microcomputer antijamming capability, capacitor C 8 two ends link to each other with power positive cathode respectively;
(7) be used to set the adjustable resistance VR2 of carbonomonoxide concentration limit value, the VR2 two ends link to each other with power positive cathode respectively, and the adjustable side links to each other with the P0.5/AD2 of single-chip microcomputer;
(8) be used for the signal of carbon monoxide transducer is carried out the temperature sensor J16 of temperature-compensating, the 1 post ground connection of J16,3 posts connect power supply, and 2 posts link to each other with temperature-compensating WENDU;
(9) be used for the exclusion J9 of drop-down toggle switch voltage, 1～5 binding post of J9 links to each other with five binding posts of toggle switch S1 respectively;
(10) be used for controller is carried out the toggle switch S1 of address setting, 1～5 binding post of S1 links to each other with five binding posts of toggle switch voltage exclusion J9 respectively.
Relay in the said apparatus comprises:
(1) be used to binding post J7 that relay is connected with single-chip microcomputer, J7 links to each other with resistance QR1 with anti-transition diode TVS2, electric capacity QC1;
(2) be used for relay is carried out the anti-transition diode TVS2 of overvoltage protection, the TVS2 two ends link to each other with 1,4 binding posts of J7 respectively;
(3) be used to form the electric capacity QC1 and the resistance QR1 in anti-interference release loop, link to each other with 1,4 binding posts of J7 respectively.
Telecommunication circuit in the said apparatus comprises:
(1) be used for the communication chip U6 of the many group relaies of centralized Control, the VCC of U6 connects positive source, GND ground connection;
(2) be used for drawing resistance R 8, the R9 of COM1, R8 other end ground connection wherein, another termination positive source of R9;
(3) be used to be provided with the resistance R 12 of communication terminal resistance, the one end links to each other with the A mouth of U6, and the other end links to each other with the B mouth of U6;
(4) be used for telecommunication circuit is carried out the anti-transition diode TVS5 and the TVS6 of overvoltage protection, TVS5 is with that communication terminal resistance R 12 is set is in parallel, and TVS6 one end links to each other with the A mouth of U6, and the other end links to each other with GND;
(5) be used for telecommunication circuit is carried out the resetted fuse GR3 and the GR4 of overcurrent protection, GR3 and GR4 are connected between U6 and the binding post J14;
(6) be used to binding post J14 that controller is connected with the master control host computer, J14 has connected master control host computer and controller.
The underground garage that employing the utility model proposes does not have the carbonomonoxide concentration control device of airduct Induced fan, and the underground garage floor height is reduced, and has saved the construction investment in garage.And the simplicity of design of ventilating system, the control of carbonomonoxide concentration is effective in the underground garage, energy consumption is low.
Description of drawings
Fig. 1 is the circuit block diagram of the control device of the utility model design.
Fig. 2 is the single chip circuit figure in this control device.
Fig. 3 is the relay circuit figure in this control device.
Fig. 4 is the telecommunication circuit figure in this control device.
The specific embodiment
Proposition of the present utility model be used for the carbonomonoxide concentration control device that underground garage does not have the airduct Induced fan, its structured flowchart as shown in Figure 1, comprise: the sensor that is used to survey carbonomonoxide concentration, its model can be TGS2442 type semiconductor-type gas sensor, and measurement category is 30～1000ppm; Be used for the sensor signal is carried out the single chip circuit of A/D conversion, digital filtering, data processing, temperature and address code input and signal controlling; Be used to connect the telecommunication circuit of single-chip microcomputer and relay; Be used to carry out the relay and the contactor of the control signal that single-chip microcomputer sends by telecommunication circuit; Be used for the no airduct Induced fan that under the control of contactor, turns round; And the power supply that is used to the control device power supply.
Single chip circuit in the above-mentioned control device, circuit diagram comprise as shown in Figure 2: be used for the single-chip microcomputer U5 that A/D conversion, digital filtering and data are handled, its model is P87LPC767; Be used for resistance R 7 to the light emitting diode current limliting; Be used to make the luminous light emitting diode D2 of indicator lamp on the control panel; Be used for constituting the concussion loop, to produce the capacitor C 4 and the C5 of pulse signal with crystal oscillator U4; Be used for power filter, improve the capacitor C 8 of single-chip microcomputer antijamming capability; Be used to set the adjustable resistance VR2 of carbonomonoxide concentration limit value; Be used for the signal of carbon monoxide transducer is carried out the temperature sensor J16 18B20 of temperature-compensating; The exclusion J9 that is used for drop-down toggle switch voltage; Be used for controller is carried out the toggle switch S1 of address setting.
Relay in the above-mentioned control device, circuit diagram comprise as shown in Figure 3: be used to binding post J7 that relay is connected with single-chip microcomputer; Be used for relay is carried out the anti-transition diode TVS2 of overvoltage protection; Be used to form the electric capacity QC1 and the resistance QR1 in anti-interference release loop, with protective relay J8.
Telecommunication circuit in the above-mentioned control device, circuit diagram comprise as shown in Figure 4: be used for the communication chip U6 of the many group relaies of centralized Control, its model is RS485; Be used for drawing resistance R 8, the R9 of COM1; Be used to be provided with the resistance R 12 of communication terminal resistance; Be used for telecommunication circuit is carried out anti-transition diode TVS5, the TVS6 of overvoltage protection; Be used for telecommunication circuit is carried out resetted fuse GR3, the GR4 of overcurrent protection; Be used to binding post J14 that controller is connected with the master control host computer.
The carbonomonoxide concentration control device that the utility model proposes can be realized automatic or manual control, when turn-knob is beaten at automatic transmission, moves by following mode of operation:
(1) in the garage the whole CO concentration of plenum area less than 100ppm, but when the CO concentration of regional area (or position) surpasses 100ppm, then this induced air function that exceeds standard the zone senses automatically, and Auto Power On work, to dispel waste gas, the dilution overall density is lower than threshold values shutdown automatically after 15 minutes until the CO of this place concentration, at this moment the jet flow guide of other positions and give, exhaust blower do not work.
(2) 50% zone C O concentration is all greater than 100ppm in the garage, and then General controller starts exhaust blower, pressure fan and all Induced fan co-operation automatically, is lower than threshold values until whole CO concentration and closes ventilating system after 15 minutes automatically.
(3) for cooperating automatic building control system or the requirement of fire-fighting smoke evacuation system, General controller is gathered the dry contact signal that automatic building control system or fire-fighting smoke evacuation system provide simultaneously, when this dry contact is closed, and all blower fans of positive closing; When this node open circuit, master controller is pressed the setting means operation.
Claims (4)
1, a kind ofly be used for the carbonomonoxide concentration control device that underground garage does not have the airduct Induced fan, it is characterized in that this device comprises:
(1) be used to survey the sensor of carbonomonoxide concentration, sensor is connected with single-chip microcomputer;
(2) be used for the sensor signal is carried out the single chip circuit of A/D conversion, digital filtering, data processing, temperature and address code input and signal controlling, be connected with power supply with sensor, keyboard state indicator lamp, the communicating circuit of carbonomonoxide concentration;
(3) be used to connect the telecommunication circuit of single-chip microcomputer and relay, telecommunication circuit links to each other with single-chip microcomputer, master control host computer and each relay;
(4) be used to carry out the relay and the contactor of the control signal that single-chip microcomputer sends by telecommunication circuit, relay is connected with contactor, and relay is connected with telecommunication circuit, contactor with do not have the pipe Induced fan and be connected;
(5) be used for the no airduct Induced fan that under the control of contactor, turns round, do not have the pipe Induced fan and be connected with contactor;
(6) power supply that is used to control device to power, power supply is connected with single-chip microcomputer.
2, device as claimed in claim 1 is characterized in that wherein said single chip circuit comprises:
(1) is used for the single-chip microcomputer U5 that A/D conversion, digital filtering and data are handled;
(2) be used for resistance R 7 to the light emitting diode current limliting, an end of resistance is connected with temperature sensor;
(3) be used to make the luminous light emitting diode D2 of indicator lamp on the control panel, an end of light emitting diode links to each other with power supply by resistance R 7, and the other end links to each other with the P1.7 of single-chip microcomputer;
(4) be used for constituting the concussion loop with crystal oscillator U4, to produce the capacitor C 4 and the C5 of pulse signal, capacitor C 4 and C5 are parallel to the two ends of crystal oscillator U4;
(5) be used for power filter, improve the capacitor C 8 of single-chip microcomputer antijamming capability, capacitor C 8 two ends link to each other with power positive cathode respectively;
(7) be used to set the adjustable resistance VR2 of carbonomonoxide concentration limit value, the VR2 two ends link to each other with power positive cathode respectively, and the adjustable side links to each other with the P0.5/AD2 of single-chip microcomputer;
(8) be used for the signal of carbon monoxide transducer is carried out the temperature sensor J16 of temperature-compensating, the 1 post ground connection of J16,3 posts connect power supply, and 2 posts link to each other with temperature-compensating WENDU;
(9) be used for the exclusion J9 of drop-down toggle switch voltage, 1～5 binding post of J9 links to each other with five binding posts of toggle switch S1 respectively;
(10) be used for controller is carried out the toggle switch S1 of address setting, 1～5 binding post of S1 links to each other with five binding posts of toggle switch voltage exclusion J9 respectively.
3, device as claimed in claim 1 is characterized in that wherein said relay, comprising:
(1) be used to binding post J7 that relay is connected with single-chip microcomputer, J7 links to each other with resistance QR1 with anti-transition diode TVS2, electric capacity QC1;
(2) be used for relay is carried out the anti-transition diode TVS2 of overvoltage protection, the TVS2 two ends link to each other with 1,4 binding posts of J7 respectively;
(3) be used to form the electric capacity QC1 and the resistance QR1 in anti-interference release loop, link to each other with 1,4 binding posts of J7 respectively.
4, device as claimed in claim 1 is characterized in that wherein said telecommunication circuit, comprising:
(1) be used for the communication chip U6 of the many group relaies of centralized Control, the VCC of U6 connects positive source, GND ground connection;
(2) be used for drawing resistance R 8, the R9 of COM1, R8 other end ground connection wherein, another termination positive source of R9;
(3) be used to be provided with the resistance R 12 of communication terminal resistance, the one end links to each other with the A mouth of U6, and the other end links to each other with the B mouth of U6;
(4) be used for telecommunication circuit is carried out the anti-transition diode TVS5 and the TVS6 of overvoltage protection, TVS5 is with that communication terminal resistance R 12 is set is in parallel, and TVS6 one end links to each other with the A mouth of U6, and the other end links to each other with GND;
(5) be used for telecommunication circuit is carried out the resetted fuse GR3 and the GR4 of overcurrent protection, GR3 and GR4 are connected between U6 and the binding post J14;
(6) be used to binding post J14 that controller is connected with the master control host computer, J14 has connected master control host computer and controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420064689 CN2775525Y (en) | 2004-06-04 | 2004-06-04 | Carbon monoxide concentration controller for inducing fan without air pipe for underground garage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420064689 CN2775525Y (en) | 2004-06-04 | 2004-06-04 | Carbon monoxide concentration controller for inducing fan without air pipe for underground garage |
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| Publication Number | Publication Date |
|---|---|
| CN2775525Y true CN2775525Y (en) | 2006-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200420064689 Expired - Fee Related CN2775525Y (en) | 2004-06-04 | 2004-06-04 | Carbon monoxide concentration controller for inducing fan without air pipe for underground garage |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713581B (en) * | 2009-11-25 | 2012-07-25 | 山东大学 | Stored PH3 gas concentration monitoring device |
| CN102754137A (en) * | 2009-09-17 | 2012-10-24 | 追梦信徒有限公司 | Carbon monoxide safety system and method |
| CN103711718A (en) * | 2013-12-13 | 2014-04-09 | 宁波东灵水暖空调配件有限公司 | Induced fan controller |
| CN103711719A (en) * | 2013-12-13 | 2014-04-09 | 宁波东灵水暖空调配件有限公司 | Induced fan control system |
| CN105220919A (en) * | 2015-10-23 | 2016-01-06 | 上海市政工程设计研究总院（集团）有限公司 | A kind of underground stereo garage parking inductive ventilation system and method thereof |
| CN105386629A (en) * | 2015-10-16 | 2016-03-09 | 上海市政工程设计研究总院（集团）有限公司 | Inductive ventilating device and method for underground three-dimensional garage |
| CN105387577A (en) * | 2015-12-19 | 2016-03-09 | 成都川通达科技有限公司 | Self-control ventilation system for circuit fixed underground parking |
| CN105402859A (en) * | 2015-12-19 | 2016-03-16 | 成都川通达科技有限公司 | Self-control ventilation system for sensor-protective underground parking garage |
| CN105402858A (en) * | 2015-12-19 | 2016-03-16 | 成都川通达科技有限公司 | Voltage and current stabilized intelligent ventilation system for underground parking garage |
| CN105423496A (en) * | 2015-12-19 | 2016-03-23 | 成都川通达科技有限公司 | Steady-flow type self-control ventilation system for underground parking lot |
| CN105444360A (en) * | 2015-12-19 | 2016-03-30 | 成都川通达科技有限公司 | Intelligent ventilation system of underground parking lot |
| CN105444361A (en) * | 2015-12-19 | 2016-03-30 | 成都川通达科技有限公司 | Current-stabilizing voltage-reducing type intelligent ventilation system of underground parking garage |
| CN105465936A (en) * | 2015-12-19 | 2016-04-06 | 成都川通达科技有限公司 | Voltage stabilizing type self-controlled ventilation system for underground parking lot |
| CN105485843A (en) * | 2015-12-19 | 2016-04-13 | 成都川通达科技有限公司 | Double-circuit safe self-control ventilating system for underground parking garage |
| CN105485844A (en) * | 2015-12-19 | 2016-04-13 | 成都川通达科技有限公司 | Voltage reduction protective intelligent ventilating system for underground parking garage |
| CN105509222A (en) * | 2015-12-04 | 2016-04-20 | 重庆工业职业技术学院 | Intelligent ventilation, smoke discharge and dehumidification system for garage and control method thereof |
| CN105526674A (en) * | 2015-12-19 | 2016-04-27 | 成都川通达科技有限公司 | Voltage stabilization and protection type self-control ventilating system for underground parking lot |
| CN105526673A (en) * | 2015-12-19 | 2016-04-27 | 成都川通达科技有限公司 | Voltage stabilization and reduction type intelligent underground parking lot ventilating system |
| CN105546729A (en) * | 2015-12-19 | 2016-05-04 | 成都川通达科技有限公司 | Hybrid type intelligent ventilation system for underground parking garage |
| CN105546727A (en) * | 2015-12-19 | 2016-05-04 | 成都川通达科技有限公司 | Self-controlled ventilation system for underground parking garage |
| CN105546728A (en) * | 2015-12-19 | 2016-05-04 | 成都川通达科技有限公司 | Steady-current protection type self-controlled ventilation system for underground parking garage |
| CN105546725A (en) * | 2015-12-19 | 2016-05-04 | 成都川通达科技有限公司 | Stabilized current protection type intelligent ventilation system for underground parking lot |
| CN109028512A (en) * | 2018-07-12 | 2018-12-18 | 合肥市神雕起重机械有限公司 | A kind of environmental control system based on intelligent garage |
| CN111623482A (en) * | 2020-04-24 | 2020-09-04 | 四川慧享智能工程有限公司 | Intelligent induced ventilation control system |
-
2004
- 2004-06-04 CN CN 200420064689 patent/CN2775525Y/en not_active Expired - Fee Related
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102754137A (en) * | 2009-09-17 | 2012-10-24 | 追梦信徒有限公司 | Carbon monoxide safety system and method |
| CN101713581B (en) * | 2009-11-25 | 2012-07-25 | 山东大学 | Stored PH3 gas concentration monitoring device |
| CN103711718A (en) * | 2013-12-13 | 2014-04-09 | 宁波东灵水暖空调配件有限公司 | Induced fan controller |
| CN103711719A (en) * | 2013-12-13 | 2014-04-09 | 宁波东灵水暖空调配件有限公司 | Induced fan control system |
| CN103711718B (en) * | 2013-12-13 | 2016-10-05 | 宁波东灵水暖空调配件有限公司 | A kind of inducing ventilating controller |
| CN105386629A (en) * | 2015-10-16 | 2016-03-09 | 上海市政工程设计研究总院（集团）有限公司 | Inductive ventilating device and method for underground three-dimensional garage |
| CN105386629B (en) * | 2015-10-16 | 2019-05-14 | 上海市政工程设计研究总院（集团）有限公司 | Underground stereo garage parking induced draught device and its induced draught method |
| CN105220919A (en) * | 2015-10-23 | 2016-01-06 | 上海市政工程设计研究总院（集团）有限公司 | A kind of underground stereo garage parking inductive ventilation system and method thereof |
| CN105509222B (en) * | 2015-12-04 | 2018-02-02 | 重庆工业职业技术学院 | Garage intelligent aeration smoke evacuation dehumidification system and its control method |
| CN105509222A (en) * | 2015-12-04 | 2016-04-20 | 重庆工业职业技术学院 | Intelligent ventilation, smoke discharge and dehumidification system for garage and control method thereof |
| CN105465936A (en) * | 2015-12-19 | 2016-04-06 | 成都川通达科技有限公司 | Voltage stabilizing type self-controlled ventilation system for underground parking lot |
| CN105546727A (en) * | 2015-12-19 | 2016-05-04 | 成都川通达科技有限公司 | Self-controlled ventilation system for underground parking garage |
| CN105444360A (en) * | 2015-12-19 | 2016-03-30 | 成都川通达科技有限公司 | Intelligent ventilation system of underground parking lot |
| CN105485843A (en) * | 2015-12-19 | 2016-04-13 | 成都川通达科技有限公司 | Double-circuit safe self-control ventilating system for underground parking garage |
| CN105485844A (en) * | 2015-12-19 | 2016-04-13 | 成都川通达科技有限公司 | Voltage reduction protective intelligent ventilating system for underground parking garage |
| CN105423496A (en) * | 2015-12-19 | 2016-03-23 | 成都川通达科技有限公司 | Steady-flow type self-control ventilation system for underground parking lot |
| CN105526674A (en) * | 2015-12-19 | 2016-04-27 | 成都川通达科技有限公司 | Voltage stabilization and protection type self-control ventilating system for underground parking lot |
| CN105526673A (en) * | 2015-12-19 | 2016-04-27 | 成都川通达科技有限公司 | Voltage stabilization and reduction type intelligent underground parking lot ventilating system |
| CN105546729A (en) * | 2015-12-19 | 2016-05-04 | 成都川通达科技有限公司 | Hybrid type intelligent ventilation system for underground parking garage |
| CN105444361A (en) * | 2015-12-19 | 2016-03-30 | 成都川通达科技有限公司 | Current-stabilizing voltage-reducing type intelligent ventilation system of underground parking garage |
| CN105546728A (en) * | 2015-12-19 | 2016-05-04 | 成都川通达科技有限公司 | Steady-current protection type self-controlled ventilation system for underground parking garage |
| CN105546725A (en) * | 2015-12-19 | 2016-05-04 | 成都川通达科技有限公司 | Stabilized current protection type intelligent ventilation system for underground parking lot |
| CN105402858A (en) * | 2015-12-19 | 2016-03-16 | 成都川通达科技有限公司 | Voltage and current stabilized intelligent ventilation system for underground parking garage |
| CN105402859A (en) * | 2015-12-19 | 2016-03-16 | 成都川通达科技有限公司 | Self-control ventilation system for sensor-protective underground parking garage |
| CN105387577A (en) * | 2015-12-19 | 2016-03-09 | 成都川通达科技有限公司 | Self-control ventilation system for circuit fixed underground parking |
| CN109028512A (en) * | 2018-07-12 | 2018-12-18 | 合肥市神雕起重机械有限公司 | A kind of environmental control system based on intelligent garage |
| CN111623482A (en) * | 2020-04-24 | 2020-09-04 | 四川慧享智能工程有限公司 | Intelligent induced ventilation control system |
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