CN109737548A - A kind of fresh air system of self-adaption constant positive pressure - Google Patents
A kind of fresh air system of self-adaption constant positive pressure Download PDFInfo
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- CN109737548A CN109737548A CN201910169231.8A CN201910169231A CN109737548A CN 109737548 A CN109737548 A CN 109737548A CN 201910169231 A CN201910169231 A CN 201910169231A CN 109737548 A CN109737548 A CN 109737548A
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- 238000004891 communication Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000007914 intraventricular administration Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000036541 health Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
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Classifications
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a kind of fresh air system of self-adaption constant positive pressure, comprising: the interior fresh wind tube with outdoor of communication chamber；Outdoor fresh air is delivered to interior by the new blower being set in the fresh wind tube, the new blower；Room pressure sensor and pressure outside sensor, the room pressure sensor are set to interior, and the pressure outside sensor is set to outdoor；Variable air rate valve, the variable air rate valve are mounted on the fresh wind tube, and the fresh air is delivered to interior by variable air rate valve；Controller, the controller are connect with the new blower, variable air rate valve, room pressure sensor with pressure outside sensor respectively.Air quantity degree of regulation of the invention is higher, and room pressure fluctuation is smaller, to improve the comfort level of indoor occupant.
Description
Technical field
The present invention relates to the fresh air system design fields more particularly to a kind of fresh air of self-adaption constant positive pressure in building
System.
Background technique
In recent years, fresh air system was applied in various interior architectures by more and more extensive, by new blower and pipe fitting
Composition is passed through interior after being handled outdoor fresh air, guarantee that room air is fresh, build a comfortable Interior Space compression ring
Border, and fresh air system in the prior art often focuses on emphatically the control of constant indoor temperature, constant humidity.However comfortable indoor environment is built
If keeping indoor permanent positive pressure also particularly significant, permanent positive pressure environment is for completely cutting off building enclosure gap other than control constant temperature, constant humidity
The Air Infiltration at place, air pollutants, improving indoor whole air-tightness has larger help.
If being adjusted by the pressure difference inside and outside direct measuring chamber and by air quantity of the pressure difference to the new blower of variable air rate
Section, to play the role of adjusting room pressure, since the air quantity of the new blower of variable air rate is adjusted by its frequency converter, frequency converter tune
The precision for saving air quantity is poor, fluctuates so as to cause room pressure bigger, it is difficult to achieve the purpose that permanent positive pressure.
Summary of the invention
The object of the present invention is to provide a kind of fresh air system of self-adaption constant positive pressure, and air quantity degree of regulation is higher, intraventricular pressure
Fluctuation is smaller, improves the comfort level of indoor occupant.
Technical solution provided by the invention is as follows:
A kind of fresh air system of self-adaption constant positive pressure, comprising: the interior fresh wind tube with outdoor of communication chamber；It is set to the fresh air
Outdoor fresh air is delivered to interior by the new blower in pipe, the new blower；Room pressure sensor and pressure outside sensor,
The room pressure sensor is set to interior, and the pressure outside sensor is set to outdoor；Variable air rate valve, the variable air rate
Valve is mounted on the fresh wind tube, and the fresh air is delivered to interior by variable air rate valve；Controller, the controller respectively with institute
State variable air rate valve, room pressure sensor is connect with pressure outside sensor.
In above structure, by being set to the room pressure sensor of height middle position and being set to higher position
Pressure outside sensor measures room pressure and pressure outside respectively, and the data measured are delivered in controller and are subtracted
Method operation obtains practical indoor and outdoor pressure difference, and then controller is realized by the aperture of control variable air rate valve to delivering into interior
The adjusting of air force, such as pressure difference > 10Pa, the control of variable air rate valve opening are 60%, pressure difference > 15Pa, variable air rate valve opening
Control is 70%.If practical indoor and outdoor pressure difference is lower than target chamber inside and outside differential pressure value, increase the aperture of variable air rate valve.If practical
Indoor and outdoor pressure difference is higher than target chamber inside and outside differential pressure value, then reduces the aperture of variable air rate valve.
Preferably, along the flow direction of the fresh air, the variable air rate valve is located between indoor and new blower.
By the way that the variable air rate valve of regulating air volume is arranged at indoor position in fresh wind tube, when the air quantity of new blower
A timing is kept, still is able to effectively adjust the air force entered the room by the opening size for adjusting variable air rate valve, thus
It realizes effective adjusting to room pressure, guarantees that room pressure fluctuation is small.
Preferably, the new blower is the new blower of variable air rate, and the frequency converter of the new blower of variable air rate is connect with controller；
Pipe pressure sensor is additionally provided in the fresh wind tube, the pipe pressure sensor is connect with the controller, and the pipe
Road pressure sensor is located between the new blower of variable air rate and variable air rate valve.
By the practical pipeline pressure in pipe pressure sensor detection pipe, when practical pipeline pressure be more than preset pressure most
When big value, controller reduces the air quantity of the new blower of variable air rate by frequency converter, matches in practical pipeline pressure to preset range.
Preferably, along the flow direction of fresh air, set gradually on the fresh wind tube primary filter, high efficiency particulate air filter with
The new blower of variable air rate.
It first passes through primary filter and filters out the biggish impurity of particle in outdoor fresh air, then filtered by high efficiency particulate air filter
Fall the fine solid particles such as PM2.5, PM10 in fresh air, guarantee enters the room that fresh air is clean, ensures the health of occupant.
Preferably, along the flow direction of fresh air, set gradually in the fresh wind tube primary filter, high efficiency particulate air filter,
The new blower of variable air rate and muffler section.
Since the new blower of variable air rate can generate noise in the process of running, and noise can be along the incoming interior of fresh wind tube, room
Inside noise will lead to the degree of comfort decreased of occupant if it exists, therefore, along the flow direction of fresh air, in the new blower of variable air rate
Rear setting one reduces noise and enters the room for eliminating the muffler section of the new fan noise of variable air rate.
Preferably, the fresh wind tube is divided into interconnected horizontal segment and vertical section, and horizontal segment is parallel to horizontal plane setting,
Vertical section is arranged perpendicular to horizontal plane；The horizontal segment of the fresh wind tube is connect with vertical section by bend muffler；It is described just to imitate
Filter,
The new blower of high efficiency particulate air filter, variable air rate and muffler section are successively set in the horizontal segment of the fresh wind tube；It is described
Variable air rate valve is arranged in the vertical section of fresh wind tube, and pipe pressure sensor is arranged in the vertical section of fresh wind tube.
Since fresh air generates larger resistance in elbow, so that fresh wind tube occurs vibration and generates noise, by setting
It sets bend muffler and eliminates noise at this, be further reduced noise and enter the room.
Preferably, the fresh air system of the self-adaption constant positive pressure further include: touch display screen, the touch display screen setting
It is connect in the indoor and described touch display screen with the controller.
Touch display screen can obtain the real-time wind of room pressure, pressure outside and the new blower of variable air rate from controller
Amount, and the real-time air quantity of practical indoor and outdoor pressure difference and the new blower of variable air rate is shown, occupant being capable of real-time observation ward
Interior pressure condition.
Preferably, the variable air rate valve includes butterfly valve and quick execution device, the quick execution device and the controller
Connection.
A kind of fresh air system of self-adaption constant positive pressure provided by the invention, can bring it is following the utility model has the advantages that
The present invention is passed through indoor air quantity by adding variable air rate valve regulation fresh wind tube on fresh wind tube, when practical indoor and outdoor
When pressure difference value and target chamber inside and outside differential pressure value difference, the aperture by adjusting variable air rate valve realizes the adjusting of air force, this
The precision of the adjusting air quantity of kind of regulative mode is higher, adjustment speed relative to fast by the frequency converter adjusting new blower of variable air rate, because
This, be able to maintain room pressure fluctuation it is smaller, to improve the comfort level of indoor occupant.By setting primary filter with
High efficiency particulate air filter is filtered the granule dust in outdoor fresh air, ensures the health of occupant, and be arranged in corresponding position
For eliminating the muffler section and bend muffler of noise, reduction is passed to indoor noise.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, to the fresh air of self-adaption constant positive pressure
Above-mentioned characteristic, technical characteristic, advantage and its implementation of system are further described.
Fig. 1 is the structural schematic diagram of the fresh air system of self-adaption constant positive pressure.
Drawing reference numeral explanation:
1- fresh wind tube, in the room 2-, the new blower of 3- variable air rate, 4- muffler section, 5- bend muffler, 6- pressure outside sensor,
7- room pressure sensor, 8- touch display screen, 9- primary filter, 10- high efficiency particulate air filter, 11- controller, 12a- butterfly valve,
12b- quick execution device.
Specific embodiment
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, Detailed description of the invention will be compareed below
A specific embodiment of the invention.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, their not generations
Its practical structures as product of table.
[embodiment 1]
As shown in Figure 1, embodiment 1 discloses a kind of specific embodiment of the fresh air system of permanent positive pressure, so that intraventricular pressure
Power is maintained at slight positive pressure state, i.e., indoor external differential is for 5~15Pa between comprising: in communication chamber 2 with the fresh wind tube 1 of outdoor,
The new blower that is set in fresh wind tube 1, the room pressure sensor 7 for being set to chamber height middle position, be set to it is outdoor compared with
The pressure outside sensor 6 and controller 11 of high position are also equipped with variable air rate valve on fresh wind tube 1, and fresh air passes through variable air rate
Valve is delivered to interior 2.
Wherein, new blower is used to for outdoor fresh air being delivered to interior 2, the setting of room pressure sensor 7 indoors 2, and makes
The junction far from fresh wind tube 1 with interior 2, i.e. fresh air enters the room 2 entrance, guarantees what room pressure sensor 7 measured
The accuracy of the numerical value of room pressure.Pressure outside sensor 6 is set to outdoor, for detecting pressure outside value.
Specifically, along the flow direction of fresh air, variable air rate valve is located between interior 2 and new blower, so as to convey into
The air quantity for entering the fresh air of interior 2 is effectively adjusted.
The controller 11 be arranged in the outer surface of fresh wind tube 1 and respectively with new blower, variable air rate valve, room pressure sensor
7 connect with pressure outside sensor 6, and controller 11 is used to control the opening and closing of new blower, and receiving chamber's pressure sensor 7 and room
The room pressure and pressure outside measured at external pressure sensor 6.
It of courses, controller 11 also can be set in other positions, not have an impact to the realization of its function.
The carrying out practically process of the present embodiment is as follows:
The target chamber inside and outside differential pressure value of needs is set in controller 11.
Then, room pressure sensor 7 monitors room pressure and the intraventricular pressure force value is transferred to controller 11, outdoor
Pressure sensor 6 monitors pressure outside and the pressure outside value is transferred to controller 11, and controller 11 is by intraventricular pressure force value
It subtracts pressure outside value and obtains practical indoor and outdoor pressure difference, and the practical indoor and outdoor pressure difference and target chamber inside and outside differential pressure value are made
Compare, the aperture of variable air rate valve is then adjusted according to the difference of practical indoor and outdoor pressure difference and target chamber inside and outside differential pressure value, that is, is adjusted
Energy conservation enough passes through the air force of variable air rate valve, and variable air rate valve includes butterfly valve 12a and quick execution device 12b, quick execution device
12b is connect with controller 11.
In other specific embodiments, variable air rate valve can also be replaced using Electric air valve and analog quantity actuator, can be with
Play the role of same adjustment air quantity, details are not described herein again.
The aperture that controller 11 controls variable air rate valve can be divided into following three kinds of situations:
When practical indoor and outdoor pressure difference is less than target chamber inside and outside differential pressure value, controller 11 increases the aperture of variable air rate valve,
Increase and deliver into indoor air quantity, until practical indoor and outdoor pressure difference increases to target chamber inside and outside differential pressure value.
When practical indoor and outdoor pressure difference is greater than target chamber inside and outside differential pressure value, controller 11 reduces the aperture of variable air rate valve,
It reduces and delivers into indoor air quantity, until practical indoor and outdoor pressure difference is reduced to target chamber inside and outside differential pressure value.
When practical indoor and outdoor pressure difference is equal to target chamber inside and outside differential pressure value, controller 11 does not change opening for variable air rate valve
Degree.
Can all room pressure be caused to fluctuate since window stitches, crack between a door and its frame leaks out or personnel pass in and out interior, to indoor external pressure
Poor real-time perfoming monitoring can better ensure that interior in permanent positive pressure environment, can rapidly adjust it by variable air rate valve
Allow by air quantity, compared to by frequency converter change the new blower of variable air rate air quantity, this way adjustment speed is faster.
[embodiment 2]
As shown in Figure 1, embodiment 2 is on the basis of embodiment 1, the new blower of embodiment 2 is the new blower 3 of variable air rate, is become
The frequency converter of the new blower 3 of air quantity is connect with controller 11, and controller 11 passes through its motor of the Frequency Converter Control of the new blower 3 of variable air rate
Frequency changes air force.In the present embodiment, the motor of the new blower 3 of variable air rate uses brush DC type motor.
Lead to the explosion damage of fresh wind tube 1 in order to avoid overpressure is excessive, pipeline pressure sensing is additionally provided in fresh wind tube 1
Device (does not mark) in figure, and pipe pressure sensor is connect with controller 11, and pipe pressure sensor is located at the new blower 3 of variable air rate
Between variable air rate valve.
The size of preset pressure maximum value is set in controller 11, passes through the reality in pipe pressure sensor detection pipe
Pipeline pressure, when practical pipeline pressure is more than preset pressure maximum value, controller 11 reduces variable air rate fresh air by frequency converter
The air quantity of machine 3.For example, preset pressure maximum value is 5Pa, if the practical pipeline pressure that pipe pressure sensor detects is 6Pa,
So controller 11, which passes through preset pressure maximum value, reduces the air quantity of the new blower 3 of variable air rate with the difference of practical pipeline pressure, from
And it reduces in practical pipeline pressure to preset range.
[embodiment 3]
As shown in Figure 1, embodiment 3 is on the basis of embodiment 2, in embodiment 3, along the flow direction of fresh air, fresh air
Primary filter 9, high efficiency particulate air filter 10 and the new blower 3 of variable air rate are set gradually on pipe 1.
Wherein, primary filter 9 uses leaf filter, for filtering the biggish impurity of the particle in outdoor fresh air.It is high
Effect filter 10 is HEPA filter, for removing the fine solid particle of PM10, PM2.5 in fresh air.Guarantee enter the room 2 it is new
Wind will not influence the health of occupant.
High efficiency particulate air filter 10 is also possible to electrostatic precipitator, which connect with controller 11, and controller 11 can
Being turned on or off for the electrostatic precipitator is controlled, when the new blower 3 of the opening variable air rate of controller 11, opening electrostatic can be synchronized
Deduster is filtered.
[embodiment 4]
As shown in Figure 1, embodiment 4 is on the basis of embodiment 2~3, in embodiment 4, along the flow direction of fresh air, newly
The new blower 3 of primary filter 9, high efficiency particulate air filter 10, variable air rate and muffler section 4 are set gradually on air hose 1.Fresh wind tube 1, which divides, is
Interconnected horizontal segment and vertical section, horizontal segment are parallel to horizontal plane setting, and vertical section is arranged perpendicular to horizontal plane.Fresh wind tube
1 horizontal segment and vertical section are connect by bend muffler 5, the new blower 3 of primary filter 9, high efficiency particulate air filter 10, variable air rate and
Muffler section 4 is successively set in the horizontal segment of fresh wind tube 1, and variable air rate valve is arranged in the vertical section of fresh wind tube 1, and pipeline pressure passes
Sensor is arranged in the vertical section of fresh wind tube 1, i.e., between bend muffler 5 and variable air rate valve.
Muffler section 4 is passed in porous sound-absorbing material or sound absorption structure using cellular dissipative muffler using sound wave
It broadcasts, is dissipated due to friction can convert thermal energy for sound, to reach noise elimination purpose.It of courses, it can also be resistive using chip
Silencer, folded plate type dissipative muffler, labyrinth type dissipative muffler, acoustic streaming formula dissipative muffler etc., details are not described herein again.
Bend muffler 5 is used to eliminate the noise that fresh air is generated in the turning junction of horizontal segment and vertical section, reduces noise
Enter the room 2 influence occupants.
More preferably, it 2 setting touch display screen, the touch display screen can also connect, touch aobvious with controller 11 indoors
Display screen receives the real-time air quantity of the new blower 3 of practical indoor and outdoor pressure difference and variable air rate from controller 11 and is shown
Show, understands indoor 2 pressure conditions in real time convenient for occupant.
Up-regulation button for adjusting target chamber inside and outside differential pressure value can also be set in touch display screen and lowered and pressed
Button, after occupant adjusts target chamber inside and outside differential pressure value, touch display screen transmits the target chamber inside and outside differential pressure value after the adjusting
To controller 11, the target chamber inside and outside differential pressure value of 11 pairs of controller former storages is updated, and according in updated target chamber
External pressure difference is run.
In 1~embodiment of previous embodiment 4, setting exhaust blower can be used, air draft is carried out to interior 2, exhaust blower includes
Blower and air draft frequency converter, and the air draft frequency converter of the exhaust blower is connect with controller 11, controller 11 can pass through row
The electric machine frequency of the blower of wind Frequency Converter Control exhaust blower, to adjust the exhaust air rate of exhaust blower.
The air quantity of the same coordinated control exhaust blower of controller 11 and the air force of the new blower 3 of variable air rate, can be more flexible
Indoor 2 pressure are adjusted in ground, and details are not described herein again.
It should be noted that above-described embodiment can be freely combined as needed.The above is only of the invention preferred
Embodiment, it is noted that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (8)
1. a kind of fresh air system of self-adaption constant positive pressure characterized by comprising
The interior fresh wind tube with outdoor of communication chamber；
Outdoor fresh air is delivered to interior by the new blower being set in the fresh wind tube, the new blower；
Room pressure sensor and pressure outside sensor, the room pressure sensor are set to interior, the outdoor pressure
Force snesor is set to outdoor；
Variable air rate valve, the variable air rate valve are mounted on the fresh wind tube, and the fresh air is delivered to interior by variable air rate valve；
Controller, the controller respectively with the new blower, variable air rate valve, room pressure sensor and pressure outside sensor
Connection.
2. the fresh air system of self-adaption constant positive pressure according to claim 1, it is characterised in that:
Along the flow direction of the fresh air, the variable air rate valve is located between indoor and new blower.
3. the fresh air system of self-adaption constant positive pressure according to claim 1, it is characterised in that:
The new blower is the new blower of variable air rate, and the frequency converter of the new blower of variable air rate is connect with controller；
Pipe pressure sensor is additionally provided in the fresh wind tube, the pipe pressure sensor is connect with the controller, and institute
Pipe pressure sensor is stated to be located between the new blower of variable air rate and variable air rate valve.
4. the fresh air system of self-adaption constant positive pressure according to claim 3, it is characterised in that:
Along the flow direction of fresh air, primary filter, high efficiency particulate air filter and the variable air rate are set gradually on the fresh wind tube
New blower.
5. the fresh air system of self-adaption constant positive pressure according to claim 3, it is characterised in that:
Along the flow direction of fresh air, the new blower of primary filter, high efficiency particulate air filter, variable air rate is set gradually in the fresh wind tube
And muffler section.
6. the fresh air system of self-adaption constant positive pressure according to claim 5, it is characterised in that:
The fresh wind tube is divided into interconnected horizontal segment and vertical section, and horizontal segment is parallel to horizontal plane setting, and vertical section is vertical
It is arranged in horizontal plane；
The horizontal segment of the fresh wind tube is connect with vertical section by bend muffler；
The new blower of the primary filter, high efficiency particulate air filter, variable air rate and muffler section are successively set on the water of the fresh wind tube
In flat section；
The variable air rate valve is arranged in the vertical section of fresh wind tube, and pipe pressure sensor is arranged in the vertical section of fresh wind tube.
7. the fresh air system of self-adaption constant positive pressure according to claim 3, which is characterized in that further include: touch display screen,
The touch display screen is set to the indoor and described touch display screen and connect with the controller.
8. the fresh air system of self-adaption constant positive pressure described according to claim 1~any one of 7, it is characterised in that:
The variable air rate valve includes butterfly valve and quick execution device, and the quick execution device is connect with the controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910169231.8A CN109737548A (en) | 2019-03-06 | 2019-03-06 | A kind of fresh air system of self-adaption constant positive pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910169231.8A CN109737548A (en) | 2019-03-06 | 2019-03-06 | A kind of fresh air system of self-adaption constant positive pressure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110793146A (en) * | 2019-12-18 | 2020-02-14 | 海底捞控股私人有限公司 | Ground exhaust system and control method thereof |
| CN111878862A (en) * | 2020-06-24 | 2020-11-03 | 青岛海尔空调电子有限公司 | Control method and system of range hood |
| CN113983647A (en) * | 2021-10-18 | 2022-01-28 | 珠海格力电器股份有限公司 | Energy-saving control method for double-cold-source fresh air combined type air conditioning unit |
| CN114294803A (en) * | 2021-11-25 | 2022-04-08 | 珠海格力电器股份有限公司 | Auxiliary voltage stabilizing device and voltage stabilizing method |
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