CN105509223A - CIT pressure adjustable ventilation and purification system - Google Patents
CIT pressure adjustable ventilation and purification system Download PDFInfo
- Publication number
- CN105509223A CN105509223A CN201510968914.1A CN201510968914A CN105509223A CN 105509223 A CN105509223 A CN 105509223A CN 201510968914 A CN201510968914 A CN 201510968914A CN 105509223 A CN105509223 A CN 105509223A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/082—Grilles, registers or guards
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Atmospheric Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Ventilation (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a CIT pressure adjustable ventilation and purification system which comprises an air supply device, an air exhaust device, a frequency converter and a differential pressure transducer. During the operation process of the ventilation and purification system, under the action of a supply fan, fresh air is filtered by a primary efficiency filter, a medium efficiency filter and a high efficiency filter, and the three-stage filtered air enters a room from an air inlet. The differential pressure transducer is used for detecting the pressure in the room. The opening of a first air valve adjusted according to the detection result, and the rotating speed of the supply fan is adjusted, so as to change the volume of air introducing the room to adjust the pressure in the room. Contaminated air in the room is periodically exhausted under the action of an exhaust fan to ensure the air quality and the pressure in the room. The ventilation and purification system, provided by the invention, can provide purified air for the room, and can adjust the pressure in the room.
Description
Technical field
The present invention relates to purification aeration technology field, particularly relate to a kind of purification ventilating system of CIT adjustable pressure.
Background technology
Air ventilation and purification system is the equipment carrying out indoor air purification, contaminated for indoor air is discharged into outdoor through exhaust outlet and blower fan, outdoor fresh air enters indoor, while air-supply, carry out new wind filtration, the poison that goes out, sterilization, oxygenation, preheating to entering indoor air.At present, in purification Ventilation Control, there is workspace pressure uncontrollable, airflow direction problem can not be ensured, Changes in weather, atmospheric pressure can be caused to decline, affect the comfort level of room environment, thus affect room air level.
Summary of the invention
For solving the technical problem existed in background technology, the present invention proposes a kind of purification ventilating system of CIT adjustable pressure, can provide and purify air, and regulate the pressure in room in room.
The purification ventilating system of a kind of CIT adjustable pressure that the present invention proposes, for regulating the air in room, comprising: air-supply arrangement, air exhausting device, frequency converter, differential pressure pickup, controller;
Air-supply arrangement comprises wind pushing box and ajutage, wind pushing box is provided with air inlet and air outlet, the wind pushing cavity extended from air inlet to air outlet is provided with in wind pushing box, pressure fan, roughing efficiency air filter, medium effeciency filter is provided with in described wind pushing cavity, roughing efficiency air filter is between air inlet and pressure fan, medium effeciency filter is between pressure fan and air outlet, and ajutage one end is connected to the air outlet place of wind pushing box, and ajutage is provided with the first air-valve and high efficiency particulate air filter;
Room has air intlet and air outlet slit, and ajutage is communicated with described air intlet away from one end of wind pushing box, and differential pressure pickup is positioned at room;
Air exhausting device comprises exhaust duct and exhaust blower, and exhaust duct one end is communicated with exhaust blower, and the other end is communicated with the described air outlet slit in room;
Differential pressure pickup, frequency converter, the first air-valve are all connected with controller, and controller controls the first air-valve regulating spool aperture according to the pressure signal that differential pressure pickup detects, and control the rotating speed that described frequency converter regulates pressure fan.
Preferably, air intlet place is provided with the first wind-guiding grid, and air outlet slit place is provided with the second wind-guiding grid.
Preferably, preset the first pressure threshold in controller, when the force value that differential pressure pickup detects is less than the first pressure threshold, controller controls the first air-valve and increases spool aperture, and controls the rotating speed that described frequency converter increases pressure fan.
Preferably, exhaust duct is provided with the second air-valve, and the second air-valve is all connected with controller with exhaust blower, and controller controls the second air-valve regulating spool aperture according to the pressure signal that differential pressure pickup detects, and controls exhaust blower switch.
Preferably, preset the second pressure threshold in controller, the second pressure threshold is greater than the first pressure threshold, and when the force value that differential pressure pickup detects is greater than the second pressure threshold, controller controls exhaust blower and opens and control the second air-valve increase spool aperture.
Preferably, when the force value that differential pressure pickup detects is greater than the second pressure threshold, controller controls the first air-valve and reduces spool aperture, and controls the rotating speed that described frequency converter reduces pressure fan.
Preferably, to be the scope of K, K be the spool aperture of the first air-valve: 15%-85%.
Preferably, the model of differential pressure pickup is CYH-130.
In the present invention, the purification ventilating system of the CIT adjustable pressure proposed, comprise air-supply arrangement, air exhausting device, frequency converter, differential pressure pickup, in the course of the work, under the effect of pressure fan, new wind is successively through roughing efficiency air filter, room is entered from air intake after the three-stage filtration of medium effeciency filter and high efficiency particulate air filter, differential pressure pickup detects the pressure in room, first air-valve regulates aperture according to this testing result, and pressure fan adjusting rotary speed, thus change the air quantity introducing room, to regulate pressure in room, foul atmosphere in room is regularly discharged under the effect of exhaust blower, thus air quality in guarantee room and pressure.By the purification ventilating system of the CIT adjustable pressure of above-mentioned optimal design, can provide in room and purify air, and regulate the pressure in room.
Accompanying drawing explanation
Fig. 1 is the structural representation of the purification ventilating system of a kind of CIT adjustable pressure that the present invention proposes.
Detailed description of the invention
As shown in Figure 1, Fig. 1 is the structural representation of the purification ventilating system of a kind of CIT adjustable pressure that the present invention proposes.
With reference to Fig. 1, the purification ventilating system of a kind of CIT adjustable pressure that the present invention proposes, for regulating the air in room 1, comprising: air-supply arrangement, air exhausting device, frequency converter, differential pressure pickup 6;
Air-supply arrangement comprises wind pushing box 2 and ajutage 3, wind pushing box 2 is provided with air inlet and air outlet, the wind pushing cavity extended from air inlet to air outlet is provided with in wind pushing box 2, pressure fan 21 is provided with in described wind pushing cavity, roughing efficiency air filter 22, medium effeciency filter 23, pressure fan 21 adopts variable speed fan, frequency converter is connected with pressure fan 21, roughing efficiency air filter 22 is between air inlet and pressure fan 21, medium effeciency filter 23 is between pressure fan 21 and air outlet, ajutage 3 one end is connected to the air outlet place of wind pushing box, ajutage 3 is provided with the first air-valve 31 and high efficiency particulate air filter 32, the spool aperture of the first air-valve 4 is K, the scope of K is: 15%-85%,
Room 1 has air intlet and air outlet slit, air intlet place is provided with the first wind-guiding grid 71, and air outlet slit place is provided with the second wind-guiding grid 72, and ajutage 3 is communicated with described air intlet away from one end of wind pushing box 2, differential pressure pickup 6 is positioned at room 1, and its model is CYH-130;
Air exhausting device comprises exhaust duct 4 and exhaust blower 5, and exhaust duct 4 one end is communicated with exhaust blower 5, and the other end is communicated with the described air outlet slit in room 1, and exhaust duct 4 is provided with the second air-valve 41;
In control mode, differential pressure pickup 6, frequency converter, the first air-valve 31 are all connected with controller, controller controls the first air-valve 31 regulating spool aperture according to the pressure signal that differential pressure pickup 6 detects, and control the rotating speed that described frequency converter regulates pressure fan 21, second air-valve 41 is all connected with controller with exhaust blower 5, controller controls the second air-valve 41 regulating spool aperture according to the pressure signal that differential pressure pickup 6 detects, and controls exhaust blower 5 switch.
The purification ventilating system of the CIT adjustable pressure of the present embodiment in the course of the work, under the effect of pressure fan, air is successively by wind pushing cavity and ajutage, through roughing efficiency air filter, enter in room from air intake after the three-stage filtration of medium effeciency filter and high efficiency particulate air filter, differential pressure pickup detects the pressure in room, according to the air pressure in room, first air-valve regulates air-supply aperture, frequency converter regulates the air-supply rotating speed of pressure fan, second air-valve auxiliary adjustment air draft aperture simultaneously, exhaust blower auxiliary adjustment air draft wind speed, thus regulate the air quantity introducing room, to regulate the air pressure in room, in addition, foul atmosphere in room is regularly discharged under the effect of exhaust blower, thus air quality in guarantee room and pressure.
In concrete control mode, the first pressure threshold and the second pressure threshold is preset in controller, second pressure threshold is greater than the first pressure threshold, when the force value that differential pressure pickup 6 detects is less than the first pressure threshold, controller controls the first air-valve 31 and increases spool aperture, and controls the rotating speed that described frequency converter increases pressure fan 21;
When the force value that differential pressure pickup 6 detects is greater than the second pressure threshold, controller control exhaust blower 5 is opened and is controlled the second air-valve 41 and increases spool aperture.
In use, when the force value that differential pressure pickup 6 detects is between the first pressure threshold and the second pressure threshold, controller regularly opens the first air-valve, the second air-valve control the rotating speed of pressure fan and exhaust blower simultaneously, make the pressure remained steady in room, realize the effect of the mixed-blood purification of room air.
In the present embodiment, the purification ventilating system of the CIT adjustable pressure proposed, can provide and purify air, and regulate the pressure in room in room.
In a specific embodiment, arrange exhaust blower and the second air-valve in air exhausting device, the air pressure in the first air-valve and pressure fan control room assisted by the second air-valve and exhaust blower, makes the air pressure in room obtain more effective control, adjustment efficiency improves, and degree of regulation improves.
Air intake in room and air outlet slit place are respectively equipped with the first wind-guiding grid and the second wind-guiding grid, effectively can control the air-flow direction in room, eliminate purification dead angle, and make purification more thorough, purification efficiency improves.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (8)
1. a purification ventilating system for CIT adjustable pressure, for regulating the air in room (1), is characterized in that, comprise: air-supply arrangement, air exhausting device, frequency converter, differential pressure pickup (6), controller;
Air-supply arrangement comprises wind pushing box (2) and ajutage (3), wind pushing box (2) is provided with air inlet and air outlet, wind pushing box is provided with the wind pushing cavity extended from air inlet to air outlet in (2), pressure fan (21) is provided with in described wind pushing cavity, roughing efficiency air filter (22), medium effeciency filter (23), roughing efficiency air filter (22) is positioned between air inlet and pressure fan (21), medium effeciency filter (23) is positioned between pressure fan (21) and air outlet, ajutage (3) one end is connected to the air outlet place of wind pushing box, ajutage (3) is provided with the first air-valve (31) and high efficiency particulate air filter (32),
Room (1) has air intlet and air outlet slit, and ajutage (3) is communicated with described air intlet away from one end of wind pushing box (2), and differential pressure pickup (6) is positioned at room (1);
Air exhausting device comprises exhaust duct (4) and exhaust blower (5), and exhaust duct (4) one end is communicated with exhaust blower (5), and the other end is communicated with the described air outlet slit of room (1);
Differential pressure pickup (6), frequency converter, the first air-valve (31) are all connected with controller, controller controls the first air-valve (31) regulating spool aperture according to the pressure signal that differential pressure pickup (6) detects, and controls the rotating speed that described frequency converter regulates pressure fan (21).
2. the purification ventilating system of CIT adjustable pressure according to claim 1, is characterized in that, air intlet place is provided with the first wind-guiding grid (71), and air outlet slit place is provided with the second wind-guiding grid (72).
3. the purification ventilating system of CIT adjustable pressure according to claim 1, it is characterized in that, the first pressure threshold is preset in controller, when the force value that differential pressure pickup (6) detects is less than the first pressure threshold, controller controls the first air-valve (31) and increases spool aperture, and controls the rotating speed that described frequency converter increases pressure fan (21).
4. the purification ventilating system of CIT adjustable pressure according to claim 1, it is characterized in that, exhaust duct (4) is provided with the second air-valve (41), second air-valve (41) is all connected with controller with exhaust blower (5), controller controls the second air-valve (41) regulating spool aperture according to the pressure signal that differential pressure pickup (6) detects, and controls exhaust blower (5) switch.
5. the purification ventilating system of CIT adjustable pressure according to claim 4, it is characterized in that, the second pressure threshold is preset in controller, second pressure threshold is greater than the first pressure threshold, when the force value that differential pressure pickup (6) detects is greater than the second pressure threshold, controller controls exhaust blower (5) and opens and control the second air-valve (41) increase spool aperture.
6. the purification ventilating system of CIT adjustable pressure according to claim 5, it is characterized in that, when the force value that differential pressure pickup (6) detects is greater than the second pressure threshold, controller controls the first air-valve (31) and reduces spool aperture, and controls the rotating speed that described frequency converter reduces pressure fan (21).
7. the purification ventilating system of CIT adjustable pressure according to claim 1, is characterized in that, to be the scope of K, K be for the spool aperture of the first air-valve (4): 15%-85%.
8. the purification ventilating system of CIT adjustable pressure according to claim 1, is characterized in that, the model of differential pressure pickup (6) is CYH-130.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510968914.1A CN105509223A (en) | 2015-12-17 | 2015-12-17 | CIT pressure adjustable ventilation and purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510968914.1A CN105509223A (en) | 2015-12-17 | 2015-12-17 | CIT pressure adjustable ventilation and purification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105509223A true CN105509223A (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510968914.1A Pending CN105509223A (en) | 2015-12-17 | 2015-12-17 | CIT pressure adjustable ventilation and purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105509223A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928164A (en) * | 2016-06-12 | 2016-09-07 | 华中科技大学 | Positive-pressure control system applicable to area air purifying |
| CN106275354A (en) * | 2016-08-31 | 2017-01-04 | 中船黄埔文冲船舶有限公司 | A kind of clean cabin blood circulation |
| CN106403152A (en) * | 2016-08-31 | 2017-02-15 | 山东耘威医疗科技有限公司 | Pathological air quality control equipment and system |
| CN107504622A (en) * | 2017-07-10 | 2017-12-22 | 珠海格力电器股份有限公司 | Not chummery malleation value control method, device, system and equipment unit |
| CN108840551A (en) * | 2018-05-11 | 2018-11-20 | 彩虹集团有限公司 | A kind of TFT-LCD base plate glass energy conservation shaping area pressure difference control device and control method |
| CN109625199A (en) * | 2018-11-29 | 2019-04-16 | 中国船舶重工集团公司第七〇九研究所 | Ocean nuclear power platform cabin pressure regulating system |
| CN110836431A (en) * | 2018-08-17 | 2020-02-25 | 领凡新能源科技(北京)有限公司 | Indoor ventilation system and control method thereof |
| CN111604324A (en) * | 2020-05-15 | 2020-09-01 | 北京北方华创微电子装备有限公司 | Control method of wafer cleaning machine and wafer cleaning machine |
| CN111706949A (en) * | 2020-05-29 | 2020-09-25 | 昆明理工大学 | Fresh air disinfection circulating device for underground supermarket |
| FR3097031A1 (en) * | 2019-06-04 | 2020-12-11 | Cnotreair | indoor air quality control system |
| CN112781142A (en) * | 2020-12-24 | 2021-05-11 | 珠海格力电器股份有限公司 | Laboratory air conditioning system and control method thereof |
| CN113218013A (en) * | 2020-06-23 | 2021-08-06 | 美埃(中国)环境科技股份有限公司 | Negative pressure ward exhaust purification system |
| CN113251538A (en) * | 2021-05-21 | 2021-08-13 | 中建科工集团有限公司 | Air pressure control system |
| CN113266877A (en) * | 2021-06-01 | 2021-08-17 | 青岛海尔空调器有限总公司 | Air conditioner and fresh air system thereof |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928164B (en) * | 2016-06-12 | 2019-01-29 | 华中科技大学 | A kind of positive pressure control system suitable for regional air purification |
| CN105928164A (en) * | 2016-06-12 | 2016-09-07 | 华中科技大学 | Positive-pressure control system applicable to area air purifying |
| CN106275354A (en) * | 2016-08-31 | 2017-01-04 | 中船黄埔文冲船舶有限公司 | A kind of clean cabin blood circulation |
| CN106403152A (en) * | 2016-08-31 | 2017-02-15 | 山东耘威医疗科技有限公司 | Pathological air quality control equipment and system |
| CN107504622B (en) * | 2017-07-10 | 2019-08-06 | 珠海格力电器股份有限公司 | Not chummery positive pressure value control method, device, system and equipment unit |
| CN107504622A (en) * | 2017-07-10 | 2017-12-22 | 珠海格力电器股份有限公司 | Not chummery malleation value control method, device, system and equipment unit |
| CN108840551A (en) * | 2018-05-11 | 2018-11-20 | 彩虹集团有限公司 | A kind of TFT-LCD base plate glass energy conservation shaping area pressure difference control device and control method |
| CN110836431A (en) * | 2018-08-17 | 2020-02-25 | 领凡新能源科技(北京)有限公司 | Indoor ventilation system and control method thereof |
| CN109625199A (en) * | 2018-11-29 | 2019-04-16 | 中国船舶重工集团公司第七〇九研究所 | Ocean nuclear power platform cabin pressure regulating system |
| FR3097031A1 (en) * | 2019-06-04 | 2020-12-11 | Cnotreair | indoor air quality control system |
| CN111604324A (en) * | 2020-05-15 | 2020-09-01 | 北京北方华创微电子装备有限公司 | Control method of wafer cleaning machine and wafer cleaning machine |
| CN111706949A (en) * | 2020-05-29 | 2020-09-25 | 昆明理工大学 | Fresh air disinfection circulating device for underground supermarket |
| CN113218013A (en) * | 2020-06-23 | 2021-08-06 | 美埃(中国)环境科技股份有限公司 | Negative pressure ward exhaust purification system |
| CN113218013B (en) * | 2020-06-23 | 2022-05-10 | 美埃(中国)环境科技股份有限公司 | Negative pressure ward exhaust purification system |
| CN112781142A (en) * | 2020-12-24 | 2021-05-11 | 珠海格力电器股份有限公司 | Laboratory air conditioning system and control method thereof |
| CN113251538A (en) * | 2021-05-21 | 2021-08-13 | 中建科工集团有限公司 | Air pressure control system |
| CN113266877A (en) * | 2021-06-01 | 2021-08-17 | 青岛海尔空调器有限总公司 | Air conditioner and fresh air system thereof |
| WO2022096036A1 (en) * | 2021-06-01 | 2022-05-12 | 青岛海尔空调器有限总公司 | Air conditioner and fresh air system |
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Application publication date: 20160420 |