[go: up one dir, main page]

CN112406476B - Blower and ventilation system - Google Patents

Blower and ventilation system Download PDF

Info

Publication number
CN112406476B
CN112406476B CN202010825170.9A CN202010825170A CN112406476B CN 112406476 B CN112406476 B CN 112406476B CN 202010825170 A CN202010825170 A CN 202010825170A CN 112406476 B CN112406476 B CN 112406476B
Authority
CN
China
Prior art keywords
air
fine particles
fan
dust filter
coarse dust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010825170.9A
Other languages
Chinese (zh)
Other versions
CN112406476A (en
Inventor
片冈康孝
原田茂幸
小幡尚令
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of CN112406476A publication Critical patent/CN112406476A/en
Application granted granted Critical
Publication of CN112406476B publication Critical patent/CN112406476B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/24—Devices purely for ventilating or where the heating or cooling is irrelevant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H3/00—Other air-treating devices
    • B60H3/0071—Electrically conditioning the air, e.g. by ionizing
    • B60H3/0078—Electrically conditioning the air, e.g. by ionizing comprising electric purifying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H3/00—Other air-treating devices
    • B60H3/06—Filtering
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F24F13/28—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
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/64—Airborne particle content
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Electrostatic Separation (AREA)
  • Ventilation (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The blower includes: a fan that sucks air into an air duct and sends the air out of the air duct; a coarse dust filter for capturing fine particles in the air sucked into the air passage; a fine particle detection unit for detecting fine particles in the air; and a control unit configured to control the fan so as to reduce a wind speed of air passing through the coarse dust filter when the fine particle detection unit detects fine particles having a particle diameter equal to or smaller than a predetermined particle diameter.

Description

Blower and ventilation system
Technical Field
The invention relates to a blower and a ventilation system.
Background
Japanese patent application laid-open No. 2017-53582 discloses a blower in which a fan, a filter, and an ion generating unit that generates ions are provided in a duct through which air passes when outside air is taken into a room, dust in the air is trapped, and purified air is sent out.
In the blower, for example, a high-performance HEPA filter is used to trap dust in the air.
Disclosure of Invention
However, in the blower described above, although a high-performance filter can be used to efficiently collect dust, the cost of the device itself increases due to the high price of the filter.
In view of the above, an aspect of the present invention is to realize a blower that can raise the collection of fine particles such as dust in the air while reducing the cost of the device itself.
(1) The blower according to an aspect of the present invention includes: a fan that sucks air into an air duct and sends the air out of the air duct; a coarse dust filter for capturing fine particles in the air sucked into the air passage; a fine particle detection unit for detecting fine particles in the air; and a control unit configured to control the fan so as to reduce a wind speed of air passing through the coarse dust filter when the fine particle detection unit detects fine particles having a particle diameter equal to or smaller than a predetermined particle diameter.
(2) In one embodiment of the present invention, the fine particles are PM2.5.
(3) The blower according to an aspect of the present invention further includes: an ion generating unit that generates ions in the air passage; wherein the ion generating section is disposed upwind of the coarse dust filter.
(4) In one embodiment of the present invention, the blower is a filter in which the coarse dust filter is charged.
(5) The ventilation system according to an aspect of the present invention includes: the blower according to any one of the above (1) to (4).
Drawings
Fig. 1 is a side sectional view showing a case where the blower according to the present embodiment is applied to an electric conditioning apparatus provided in a room.
Fig. 2 (a) is a perspective view showing an ion generating unit. (b) is a plan view showing the ion generating unit.
Fig. 3 (a) is a diagram showing an example of a flow of processing by the control unit of the blower. (b) Fig. is a diagram showing another example of the flow of the process of the control unit of the blower.
Fig. 4 is a side cross-sectional view showing a case where the blower according to embodiment 2 is applied to a vehicle.
Fig. 5 is a side sectional view showing the blower according to embodiment 2.
Fig. 6 is a diagram showing an experimental apparatus for obtaining the collection rate of dust collected by a filter.
FIG. 7 (a) is a table showing particle diameter size of fine particles at a wind speed of 0.7m/s and collection rate at ON or OFF of an ion generating section. (b) The particle size of the fine particles at a wind speed of 0.35m/s and the collection rate at the time of ON or OFF of the ion generating section are shown.
Detailed Description
Embodiment 1
Embodiment 1 of the present disclosure will be described with reference to fig. 1. Fig. 1 is a side cross-sectional view showing a case where the blower according to the present embodiment is applied to an electric conditioning apparatus provided in a room.
As shown in fig. 1, the electric conditioning device C is provided in a room R1 for conditioning, and includes an electromagnetic conditioner D for heating a pan or the like, a ventilation unit V for exhausting heat generated by heating and air from the room R1 to the outside R2, and a blower 1 for blowing the air from the outside to the room.
The electromagnetic cooker D has a plurality of electromagnetic induction units D1, D1 provided in a flat plate. The electromagnetic induction unit D1 is capable of heating a metallic pot or the like by induction heating when energized.
The ventilation unit V is provided between the ceiling R and the wall W above the electromagnetic cooker D. The ventilation unit V includes a substantially box-shaped ventilation main body V1 provided with a duct V2 for exhausting the heat and air of the room R1 to the outside R2, and a ventilation fan V3 provided in the duct V2 of the ventilation main body V1 for supplying air.
The ventilation body V1 is formed with a downward hood (hood) V4 to cover the electromagnetic cooker D. The passage V2 communicates one end with the suction opening V2-1 opened in the cover V4, and communicates the other end with the discharge opening V2-2 opened in the wall W.
The ventilation fan V3 is constituted by, for example, a Sirocco fan (Sirocco fan). The ventilation fan V3 may be an electric motor configured by a blade and rotationally driving the blade.
The blower 1 is a mechanism for purifying air such as the outdoor R2 and taking the air into the indoor R1. The blower 1 includes a main body 2 provided therein with an air passage 3 for supplying air sucked from an outdoor room R2 to an indoor room R1, a fan 4 for sucking air into the air passage 3 and discharging air from the air passage 3, a coarse dust filter 5 for capturing fine particles in the air, a fine particle detection unit 6 for detecting fine particles in the air, and a control unit 8 for controlling the fan 4.
The main body 2 is formed in a substantially box shape, a ceiling R is provided at an upper portion of the main body 2, and a side portion of the main body 2 is provided at a wall portion W of the room R1. The air duct 3 communicates one end with a first opening 11 opened in the side portion of the main body 2, and communicates the other end with a second opening 12 opened in the wall W. The ventilation body V1 is provided at the lower portion of the body 2.
The fan 4 is configured by, for example, a multi-blade fan, and is provided on the second opening 12 side of the air passage 3 in the main body 2. The fan 4 sucks air from the outdoor R2 through the second opening 12 to the air passage when rotated, and sends the air from the first opening 11 to the outdoor R1. The fan 4 can also be controlled by the control unit 8 to vary the wind speed. The fan 4 may be configured by a blade or a driving unit that rotationally drives the blade.
The coarse dust filter 5 is configured to collect fine particles in the air outside the room R2 supplied with air by the fan 4, and is, for example, a nonwoven fabric having a flat shape or a corrugated shape. Specifically, the coarse dust filter 5 is a filter for collecting fine particles having a particle diameter of more than 5 μm. The coarse dust filter 5 has a collection efficiency of 85% by weight or less and a dust holding capacity of 500g/m 2 ～2000g/m 2 Pressure loss of 3mmH 2 O～20H 2 O (JIS B9908:1976 type 3 of air filter unit for ventilation). The coarse dust filter 5 is provided in the first opening 11 on the air outlet side of the air duct 3. For example, a plurality of nonwoven fabrics may be used in a superimposed manner. In the experimental example described later, two nonwoven fabrics were stacked and used as the coarse dust filter 5.
The coarse dust filter 5 may be a charged filter. The coarse dust filter 5 can be charged with ions generated by an ion generating unit 7 described later. The coarse dust filter 5 is configured as a charged filter in this way, and thus, collection of fine particles can be promoted to purify air. The coarse dust filter 5 may be a filter in which, for example, a nonwoven fabric is formed of a porous filter material and is positively charged in advance.
The fine particle detection unit 6 is provided in the middle of the air passage 3 of the blower 1. Specifically, a fine particle detection unit 6 is provided between the ion generation unit 7 provided in the air duct 3 and the fan 4. The fine particle detection unit 6 detects fine particles having a predetermined particle diameter or less, for example, fine particulate matter PM2.5 (particulate matter 2.5), in the air outside. The detection result of the fine particle detection unit 6 is sent to the control unit 8. The fine particle detection unit 6 may detect the concentration of the fine particle PM2.5. Or the fine particle detection unit 6 may detect the concentration of the fine particle PM10 (particulate matter) or other fine particles. Alternatively, the fine particle detection unit 6 may indirectly detect the particle diameter or concentration of the fine particles present around the blower 1 (in particular, in the vicinity of the suction port) by receiving the particle diameter data or concentration data of the fine particles from the external device without directly detecting the particle diameter or concentration of the fine particles. For example, the fine particle detection unit 6 may be provided in the air passage of the blower 1, may acquire the concentration data of the fine particle substance PM2.5 supplied from the weather hall, and may transmit the data to the control unit 8, or may acquire the detection result data of a fine particle detection sensor provided in the same space as the blower 1, and may transmit the detection result data to the control unit 8. The fine particles having a particle diameter of not more than the predetermined particle diameter are preferably PM2.5 having a particle diameter of not more than about 2.5 μm. Further, the predetermined particle diameter is more preferably 1.0 μm or less.
The control unit 8 can receive the signal detected by the fine particle detection unit, control the rotation speed of the fan 4, and adjust the amount of air to be supplied to the room R1. Specifically, the control unit 8 controls the fan 4 so as to reduce the wind speed of the air passing through the coarse dust filter 5 when the fine particle detection unit 6 detects fine particles having a predetermined particle diameter or less. The control unit 8 can control an ion generating unit 7 (see fig. 2) described later.
The speed of the air is reduced by changing the rotational speed of the fan, but an opening/closing damper (not shown) may be provided at least one of the inlet and the outlet of the air passage. For example, the opening/closing amount of the shutter may be adjusted so that when fine particles having a particle diameter equal to or smaller than a predetermined particle diameter are detected, the shutter is opened at a low speed to reduce the wind speed. By providing the relevant opening/closing damper, the rotational speed of the fan can be kept constant and the wind speed can be controlled. In addition, the rotational speed control of the fan and the opening/closing control of the opening/closing damper may be coordinated to control the wind speed. As the structure of the opening/closing shutter, a sliding structure, a shaft rotating structure, or the like can be suitably applied.
Further, an ion generating unit 7 that generates ions is provided in the middle of the air passage 3 in the main body 2. The ion generating unit 7 is disposed near the upstream side of the coarse dust filter 5. The ion generating unit 7 generates, for example, negative ions and positive ions and discharges the negative ions and the positive ions to the air duct 3.
Fig. 2 (a) is a perspective view showing the ion generating unit 7. Fig. 2 (b) is a plan view showing the ion generating unit 7.
The ion generating unit 7 includes, for example, a substantially elongated box-shaped case 20, positive electrodes 21 and negative electrodes 22 protruding from openings 20a and 20b in the upper portion of the case 20, and discharge electrodes generated by discharge, and sensing electrodes 23 and 24 provided on the peripheral edges of the openings 20a and 20b so as to face the discharge electrodes.
Further, gate frames 25, 25 for preventing contact with the positive electrode 21 and the negative electrode 22 are provided at the longitudinal ends of the upper portion of the case 20. The discharge electrodes (positive electrode 21, negative electrode 22) of the ion generating section 7 and the induction electrodes 23, 24 are connected to the control section 8 to be discharge-controlled.
The positive electrode 21 and the negative electrode 22 are, for example, formed in a substantially brush shape obtained by bundling a plurality of linear conductors, and the lower portion thereof is fixed in the case 20. The positive electrode 21 and the negative electrode 22 may have, for example, a substantially needle-shaped configuration.
The ion generating portion 7 including brush-like electrodes can increase the ion generation amount when the same voltage is applied, compared with the needle-like electrodes, because the area of the region where positive and negative ions are generated increases.
In the ion generating section 7, when a positive high-voltage pulse is applied to the positive electrode 21 of one discharge electrode and a negative high-voltage pulse is applied to the negative electrode 22 of the other discharge electrode, corona discharge (corona discharge) is generated at the tips of the positive electrode 21 and the negative electrode 22 of the same discharge electrode, and positive ions and negative ions are generated.
The positive ion is a hydrogen ion (H) + ) Cluster ions clustered around a plurality of water molecules, denoted as H + (H 2 O) m (m is an integer of 0 or more). The negative ion is an oxygen ion (O) 2 - ) Cluster ions clustered around a plurality of water molecules, denoted as O 2 - (H 2 O) n (n is an integer of 0 or more).
When positive ions and negative ions are emitted into the air, the two ions surround the mold and virus floating in the air, and cause chemical reactions on the surfaces of the mold and virus. By the action of the hydroxide radicals (. OH) of the discharge product generated at this time, planktonic fungi and the like are removed.
The ion generating unit 7 generates a discharge product such as electrons, ions, radicals, and ozone in the air by discharge.
The ion generating unit 7 discharges both negative ions and positive ions to the air duct 3. The ion generating unit 7 is configured to generate two types of ions, but may be configured to generate either positive or negative ions. The ion generating unit 7 may mainly discharge only ions having a polarity opposite to that of the coarse dust filter 5 to the air passage 3. When the coarse dust filter 5 is positively charged, for example, only negative ions may be mainly discharged to the air duct 3 by the ion generating unit 7.
Next, an example of the flow of the process performed by the control unit of the blower according to the present embodiment will be described. Fig. 3 (a) is a diagram showing an example of a flow of processing by the control unit of the blower according to the present embodiment.
When the fan 4 (see fig. 1, for example) is driven, air of the outdoor room R2 is taken into the air passage 3 from the second opening 12 at a predetermined air volume, and the air passage 3 is ventilated and sent out into the indoor room R1 from the first opening 11. Together with the driving of the fan 4, the ion generating section 7 and the fine particle detecting section 6 are also driven. The ion generating unit 7 generates ions in the air duct 3, and for example, negative ions and positive ions are released into the air duct 3. Thus, the negative ions and the positive ions in the air duct 3 charge the PM2.5 of the fine particles of the air contained in the outdoor R2 in the air duct 3 negatively and/or positively. The negative ions or positive ions are supplied to the coarse dust filter 5 in the leeward, and the coarse dust filter 5 is negatively and/or positively charged.
As shown in fig. 3 (a), the fine particle detection unit 6 in the air duct 3 detects fine particles having a particle size equal to or smaller than a predetermined particle size, that is, PM2.5, contained in the air outside the room R2, and sends a detection signal to the control unit 8. The control unit 8 determines whether or not to acquire the detection signal of the fine particle detection unit 6 (S101).
Next, when the detection signal is acquired (yes in S101), the control unit 8 proceeds to S102. When the control unit 8 does not acquire the detection signal (no in S101), the processing of the flow is ended.
The control unit 8 performs control to reduce the wind speed generated by the fan 4 (S102). The particulate matter PM2.5 transported together with the slow air supply is supplied to the leeward side in the air duct 3, and the particulate matter having a particle diameter of 0.3 μm to 1.0 μm is collected in the coarse dust filter 5. Therefore, according to the blower 1 of the present embodiment, for example, as shown in examples described later, dust, pollen, and the like of fine particles contained in the air flowing through the duct 3 can be efficiently collected by the coarse dust filter 5 without using a high-performance filter having a high particle collection rate, for example, a HEPA filter for collecting fine particles having a particle diameter of 0.3 μm to 1.0 μm. Further, according to the blower 1 of the present embodiment, an increase in the cost of the apparatus itself can be suppressed.
Further, since the ion generating unit 7 is provided upstream of the coarse dust filter 5, the PM2.5 of the fine particles positively or negatively charged by the ion generating unit 7 can be supplied to the leeward side in the air duct 3, and the fine particles can be efficiently collected by the coarse dust filter 5 negatively or positively charged by the ion generating unit 7.
Embodiment 2
Embodiment 2 of the present disclosure will be described with reference to fig. 4 to 5. Fig. 4 is a side cross-sectional view showing a case where the blower according to embodiment 2 is applied to a vehicle. Fig. 5 is a side sectional view showing the blower according to embodiment 2. For convenience of explanation, the same functions as those of embodiment 1 described above are assigned the same reference numerals in embodiment 2, and redundant explanation is omitted.
As shown in fig. 4, the vehicle 101 is partitioned into an engine room 104, an equipment room 105, and a vehicle room 106. The engine room 104 and the device room 105 are partitioned by a partition wall, and the device room 105 and the vehicle room 106 are partitioned by an instrument panel 108 or the like.
The engine room 104 accommodates an engine (not shown) and a Radiator (not shown) in a predetermined space, and has a structure in which an upper surface is covered with a hood (bonnet) 103. The vehicle cabin 106 is a space for accommodating passengers. A plurality of seats S, S are provided in the vehicle interior 106.
The vehicle 101 includes a blower 31 for supplying air into the vehicle interior 106. As shown in fig. 5, the blower 31 includes a main body 32 disposed in a device chamber 105 (see fig. 4), a fan 34 disposed in an air passage 33 provided in the main body 32, a coarse dust filter 5, a fine particle detection unit 6, an ion generation unit 7, and a control unit 38.
The air duct 33 of the main body 32 includes a first opening 41 that opens to supply air into the vehicle interior, a second opening 42 that opens to draw in air from the vehicle exterior R4 (see, for example, fig. 4) and the vehicle interior R3 (see, for example, fig. 4), and a third opening 43. The second opening 42 communicates with the outside of the vehicle 101, and sucks air from the outside R4 into the air passage 33. The third opening 43 communicates with the outside of the vehicle interior 106, and sucks air in the vehicle interior 106 into the air passage 33. The first opening 41 communicates with the vehicle interior 106 to blow out conditioned air into the vehicle interior.
The switching damper 30, the fine particle detection unit 6, the ion generation unit 7, the coarse dust filter 5, the fan 34, the evaporator 35, and the heater core 36 are arranged in this order from the second opening 42 or the third opening 43 toward the first opening 41 (from the upstream side toward the downstream side in the air flow direction) in the air passage 33.
The switching shutter 30 selectively opens the second opening 42 for sucking the air from the outside R4 and the third opening 43 for sucking the air from the inside R3, and switches the suction of the air from the outside R4 and the air from the inside R3.
The fine particle detection unit 6 is provided in the air passage 33 of the blower 31. Specifically, the fine particle detection unit 6 is provided between the ion generation unit 7 provided in the air duct 33 and the switching damper 30. The fine particle detection unit 6 detects the concentration of, for example, fine particle-like substances PM2.5 (particulate matter 2.5) in the air outside the room by light scattering. The detection result of the fine particle detection unit 6 is sent to the control unit 38. The control unit 38 controls the air volume of the fan 34 based on the detection result of the fine particle detection unit 6.
Further, an ion generating unit 7 that generates ions is provided in the middle of the air passage 33 in the main body 2. Specifically, the ion generating unit 7 is provided between the fine particle detecting unit 6 and the coarse dust filter 5 in the air duct 33 so as to be close to the coarse dust filter 5. The ion generating unit 7 generates negative ions and positive ions and discharges the generated negative ions to the air duct 33 during, for example, the cooling operation, the heating operation, and the air blowing operation. The ion generating unit 7 generates both negative ions and positive ions in this way and discharges them into the air duct 33, whereby the coarse dust filter 5 can be positively charged on the negatively charged side of the fine particles. Further, sterilization, inactivation of viruses, and odor removal in the vehicle interior 106 can be performed.
The ion generating unit 7 may mainly discharge ions having a polarity opposite to that of the coarse dust filter 5 to the air passage 33. The ion generating unit 7 may be configured to charge the coarse dust filter 5, for example, to be positively charged in advance mainly when negative ions are discharged only to one of the air passages 33.
The coarse dust filter 5 is configured in the same manner as in embodiment 1, and purifies the air of the vehicle interior R3 and the vehicle exterior R4 supplied with air by the fan 34. The coarse dust filter 5 is provided between the ion generating unit 7 and the fan 34 in the air duct 33.
The fan 34 is configured by, for example, a multi-blade fan, and is provided between the coarse dust filter 5 and the evaporator 35 in the air passage 33. The air of the outside R4 or the air of the inside R3 driven by the fan 34 is taken into the air passage 33 from the second opening 42 or the third opening 43, and an air flow toward the first opening 41 is generated in the air passage 33.
The evaporator 35 is disposed downstream of the fan 34, and is formed by joining a plurality of blades (not shown) to a refrigerant pipe (not shown) through which a refrigerant flows. The evaporator 35 is connected to a compressor (not shown) that operates the refrigeration cycle, and when power is transmitted from the engine to the compressor via a V-belt (not shown), the refrigerant flows through the refrigerant pipe. As a result, the refrigerant evaporates in the evaporator 35, and cools the air flowing between the blades by absorbing heat, thereby performing a cooling operation.
The heater core 36 is formed by joining a plurality of blades to a radiator through which cooling water of an engine flows and a bellows (not shown) arranged in parallel. The cooling water heated by the engine is flowed through the bellows, thereby heating the air flowing between the blades to perform a heating operation. The air blowing operation is performed by cutting off the power transmission from the engine to the compressor and cutting off the flow of cooling water to the bellows of the heater core 36.
The instrument panel 108 is provided with a display unit (not shown) including a plurality of operation switches (not shown) and a plurality of displays (not shown). The user can switch between the cooling operation, the heating operation, and the air blowing operation by operating the operation switch. Each display is turned on to notify the cooling operation, the heating operation, or the air blowing operation.
Next, an example of the flow of the process performed by the control unit of the blower according to the present embodiment will be described. The flow of the process of the control unit of the blower will be described with reference to fig. 3. The engine of the vehicle 101 is started, and the operation of the operation switch, such as the air blowing operation, is selected, and the second opening 42 is opened and the third opening 43 is closed by the switching shutter 30.
When the fan 34 (see fig. 5, for example) is driven, air from the outside R4 is taken into the air passage 33 from the second opening 42 at a predetermined air volume, and the air passage 33 is ventilated and sent out into the vehicle interior 106 from the first opening 41. Together with the driving of the fan 4, the ion generating section 7 and the fine particle detecting section 6 are also driven. The ion generating unit 7 generates ions in the air duct 33, and for example, the main negative ions are released into the air duct 33. As a result, the main negative ions are released in the air duct 33, and PM2.5 of the fine particles of the air contained in the outside R4 of the vehicle in the air duct 33 is negatively charged. The positive ions are supplied to the coarse dust filter 5 in the leeward direction, and the coarse dust filter 5 is positively charged.
As shown in fig. 3 (a), the fine particle detection unit 6 in the air duct 33 detects fine particles having a particle size equal to or smaller than a predetermined particle size, that is, PM2.5, contained in the air outside the vehicle R2, and sends a detection signal to the control unit 38. The control unit 38 determines whether or not to acquire the detection signal of the fine particle detection unit 6 (S101).
Next, when the detection signal is acquired (yes in S101), the control unit 38 proceeds to S102. When the control unit 8 does not acquire the detection signal (no in S101), the processing of the flow is ended.
The control unit 38 performs control to reduce the wind speed generated by the fan 4 (S10). The PM2.5 of the fine particles transported together with the slow air supply is supplied to the leeward side in the air duct 33, and the fine particles having a particle diameter of 0.3 μm to 1.0 μm are collected in the coarse dust filter 5. Therefore, the blower 31 according to the present embodiment has the same effects as those of embodiment 1 described above.
In addition, although the rotational speed of the fan is changed to reduce the air speed of the air, an opening/closing damper (not shown) for adjusting the air volume may be provided at least one of the first opening, the second opening, or the third opening of the air passage. For example, the opening/closing amount of the shutter may be adjusted so that the air speed is reduced when the fine particles are higher than a predetermined value and the shutter is opened as compared with a case where the fine particles are lower. By providing the relevant opening/closing damper, the rotational speed of the fan can be kept constant and the wind speed can be controlled. In addition, the rotational speed control of the fan and the opening/closing control of the opening/closing damper may be coordinated to control the wind speed. As the structure of the opening/closing shutter, a sliding structure, a shaft rotating structure, or the like can be suitably applied.
The fine particle detection unit 6 is provided in the air duct 33, but may be provided in the instrument panel 108 of the vehicle interior 106.
In the cooling operation, the compressor circulates the refrigerant in the circulation flow path, and the refrigerant flows into the evaporator 35. The air having passed through the evaporator 35 is cooled, and the cool air is sent out from the first opening 41 into the vehicle interior 106. In addition, when the second opening 42 for sucking outside air is closed and the third opening 43 is opened by the switching damper 30 to circulate inside air during the heating operation or the air blowing operation, if the particulate matter detecting part 6 detects PM2.5 of particulate matters of air contained in the vehicle interior 106, the air volume of the fan 34 can be reduced and dust can be collected efficiently in the coarse dust filter.
The fine particle detection unit 6 according to each of the above embodiments may detect the amount (concentration) of fine particles although it detects fine particles having a predetermined particle diameter or smaller, and the fine particle detection unit 6 may detect both the particle diameter and the amount of fine particles. Specifically, the microparticle detection unit detects the amount (concentration) of microparticles, and transmits the detection signal to the control unit. Next, as shown in fig. 3 b, when the control unit acquires the detection signal (S201), it is determined whether the detected particulate matter PM2.5 is a predetermined value (for example, 20 μg/m) 3 ) The above (S202). If PM2.5 in the air is equal to or greater than a predetermined value (yes in S202), the process proceeds to S203. When PM2.5 of the particulate matter in the air is less than a predetermined value (no in S202), the process of the flow is terminated. The control unit 8 performs control to reduce the wind speed generated by the fan 4 (S203). The PM2.5 of the fine particles transported together with the slow air supply can be supplied to the leeward side in the air duct 3, and the fine particles having a particle diameter of 0.3 μm or more and 1.0 μm or less can be collected in the coarse dust filter 5.
Further, the ventilation system may include the air blowing according to each of the above embodiments. The ventilation system of the present disclosure is a ventilation system comprising: a fan that sucks air into at least the air passage and sends the air out of the air passage; a coarse dust filter for capturing fine particles in the air that has been sucked into the air passage; a fine particle detection unit for detecting fine particles in the air; and a control unit for controlling the blower of the fan to reduce the wind speed of the air passing through the coarse dust filter when the fine particle detection unit detects fine particles having a predetermined particle diameter or less, so that the fine particles can be supplied to, for example, a space provided in a ceiling of a building or each room in the building while purifying the air taken in from the outside. In the configuration of the coarse dust filter of the conventional ventilation system, PM2.5 or the like, which cannot be captured as fine particles, cannot be taken into the room. In addition, although the use of an expensive HEPA filter is necessary in order to always filter fine particles in the outside air when the ventilation system itself is performing ventilation for twenty-four hours, the use of the HEPA filter is very frequent, and the performance of capturing fine particles is deteriorated due to the rapid fouling, and the replacement frequency of the HEPA filter is very high, which is not economical. According to the ventilation system, since the expensive HEPA filter is not used and the fine particles can be effectively replenished with the inexpensive filter, the price of the system itself can be made inexpensive, and maintenance costs associated with replacement of the filter can be suppressed. The ventilation system is applicable to kitchen passages, vehicle passages, ventilation passages of houses such as buildings, bathroom passages, and the like.
Experimental example
Fig. 6 is an experimental apparatus for obtaining a collection rate of dust collected by a filter according to a change in the air volume of a fan. FIG. 7 (a) is a table showing the difference between the particle diameter size of fine particles at a wind speed of 0.7m/s and the collection rate and collection rate at the ON or OFF time of the ion generating section (PCI). FIG. 7 (b) is a table showing the difference between the particle diameter size of fine particles at a wind speed of 0.35m/s and the collection rate and collection rate at the ON or OFF time of the ion generating section (PCI).
As shown in fig. 6, the experimental apparatus was provided with a coarse dust filter at the center and a fan for generating an air flow at the side. An ion generating unit (hereinafter, referred to as PCI) is disposed on the upstream side of the coarse dust filter. The fine particles discharged near the fan are referred to as dust a, and the fine particles passing through the coarse dust filter are referred to as dust B.
The formula of the trapping rate can be expressed as follows.
Collection ratio (%) = (number concentration of dust a-number concentration of dust B)/(number concentration of dust a) ×100%
The coarse dust filter was used by overlapping two nonwoven fabrics (thickness: t=10 mm×2). As shown in FIG. 7 (a), the collection rate was 23.21% when PCI (OFF) was performed at a particle diameter of 0.3 μm in the case of fine particles at a wind speed of 0.7 m/s. On the other hand, as shown in FIG. 7 (b), the collection rate was 36.64% when PCI (OFF) was performed at a particle diameter of 0.3 μm in the case of fine particles at a wind speed of 0.35 m/s. The effect of increasing the collection rate by reducing the wind speed of the fan from 0.7m/s to 0.35m/s is clear, and the same effect can be confirmed even in other particle sizes.
Next, as shown in fig. 7 (a), the collection rate was 29.55% when PCI (ON) was performed at a particle diameter of 0.3 μm in the case of fine particles at a wind speed of 0.7 m/s. ON the other hand, the collection rate was 58.09% when PCI (ON) was used in the form of fine particles having a particle diameter of 0.3 μm at a wind speed of 0.35 m/s. In this way, the effect of further increasing the collection rate by reducing the fan speed from 0.7m/s to 0.35m/s by turning ON PCI becomes clear, and the same effect can be confirmed even in other particle sizes.
In the experimental example, even in the case of fine particles having a particle diameter which are difficult to be collected by the coarse dust filter 5, the effect of increasing the collection rate by reducing the wind speed can be confirmed. Further, when PCI is turned ON, the effect that the capturing rate becomes higher can be confirmed.
The ion generating unit may include a plurality of positive electrodes and negative electrodes as discharge electrodes. A plurality of sensing electrodes may be included.
Although the above embodiment has been described mainly with respect to a case where the blower is mounted on an electric conditioning apparatus or a vehicle, the blower may be mounted on, for example, an electronic device such as a dehumidifier, a humidifier, an air cleaner, an air conditioner, a deodorizer, a refrigerator, a sweeper, a conditioning home appliance, or the like.
The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the claims, and embodiments in which technical means disclosed in the different embodiments are appropriately combined are also included in the technical scope of the present invention.

Claims (5)

1. A blower, comprising:
a fan that sucks air into an air duct and sends the air out of the air duct;
a coarse dust filter that captures fine particles in the air that has been sucked into the air passage;
a fine particle detection unit which is disposed on the upstream side of the coarse dust filter in the air duct and detects fine particles in the air sucked into the air duct; and
and a control unit configured to control the fan so as to reduce a wind speed of the air passing through the coarse dust filter when the fine particle detection unit detects fine particles having a predetermined particle diameter or smaller.
2. The blower according to claim 1, wherein the blower is configured to,
the fine particles are PM2.5.
3. The blower according to claim 1 or 2, characterized by further comprising:
an ion generating unit that generates ions in the air passage; wherein the method comprises the steps of
The ion generating part is arranged at the upwind position of the coarse dust filter.
4. A blower according to claim 3, wherein the air conditioner further includes a fan,
the coarse dust filter is a charged filter.
5. A ventilation system, comprising:
the blower of any one of claims 1-4.
CN202010825170.9A 2019-08-19 2020-08-17 Blower and ventilation system Active CN112406476B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019149661A JP7273657B2 (en) 2019-08-19 2019-08-19 Blower
JP2019-149661 2019-08-19

Publications (2)

Publication Number Publication Date
CN112406476A CN112406476A (en) 2021-02-26
CN112406476B true CN112406476B (en) 2024-04-16

Family

ID=74676392

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010825170.9A Active CN112406476B (en) 2019-08-19 2020-08-17 Blower and ventilation system

Country Status (2)

Country Link
JP (1) JP7273657B2 (en)
CN (1) CN112406476B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220339314A1 (en) * 2021-04-27 2022-10-27 Healthway Home Products Company Inc. Disinfecting air filtrations system configuration
JP2023050724A (en) * 2021-09-30 2023-04-11 住友建機株式会社 working machine

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101539315A (en) * 2009-04-23 2009-09-23 广东美的电器股份有限公司 Air conditioner indoor unit and operation mode thereof
CN103032361A (en) * 2012-12-27 2013-04-10 中冶长天国际工程有限责任公司 Control method, device and system for dust removal fan
CN204404386U (en) * 2013-12-25 2015-06-17 大金工业株式会社 air purifier
CN105452031A (en) * 2013-11-27 2016-03-30 夏普株式会社 Vehicle air purifier
CN105627436A (en) * 2016-01-16 2016-06-01 杭州龙碧科技有限公司 Regenerative air particle purifying device
CN205337590U (en) * 2016-01-15 2016-06-29 胡紫微 Purify ashtray
CN205760375U (en) * 2016-05-20 2016-12-07 天津市裕控科技有限公司 A kind of classical dust-collecting air purifying box
CN207429977U (en) * 2017-11-08 2018-06-01 郑艳楠 A kind of electric automatization dust-extraction unit
CN208205319U (en) * 2018-05-23 2018-12-07 李仲好 A kind of fresh air purifier
KR102005425B1 (en) * 2018-12-03 2019-07-30 주식회사 드웰링 Control method for bus shelter blocking off fine dust using air curtain

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0641620Y2 (en) * 1989-01-25 1994-11-02 ダイキン工業株式会社 Air cleaner
JP2008142624A (en) * 2006-12-11 2008-06-26 Matsushita Electric Ind Co Ltd Air cleaner
JP6380026B2 (en) * 2014-11-11 2018-08-29 三菱電機株式会社 Ventilation device and ventilation system
JP2016205659A (en) * 2015-04-17 2016-12-08 カルソニックカンセイ株式会社 Air cleaning device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101539315A (en) * 2009-04-23 2009-09-23 广东美的电器股份有限公司 Air conditioner indoor unit and operation mode thereof
CN103032361A (en) * 2012-12-27 2013-04-10 中冶长天国际工程有限责任公司 Control method, device and system for dust removal fan
CN105452031A (en) * 2013-11-27 2016-03-30 夏普株式会社 Vehicle air purifier
CN204404386U (en) * 2013-12-25 2015-06-17 大金工业株式会社 air purifier
CN205337590U (en) * 2016-01-15 2016-06-29 胡紫微 Purify ashtray
CN105627436A (en) * 2016-01-16 2016-06-01 杭州龙碧科技有限公司 Regenerative air particle purifying device
CN205760375U (en) * 2016-05-20 2016-12-07 天津市裕控科技有限公司 A kind of classical dust-collecting air purifying box
CN207429977U (en) * 2017-11-08 2018-06-01 郑艳楠 A kind of electric automatization dust-extraction unit
CN208205319U (en) * 2018-05-23 2018-12-07 李仲好 A kind of fresh air purifier
KR102005425B1 (en) * 2018-12-03 2019-07-30 주식회사 드웰링 Control method for bus shelter blocking off fine dust using air curtain

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张殿印 等.《除尘技术手册》.冶金工业出版社,2002,(第1版),第105页. *

Also Published As

Publication number Publication date
JP7273657B2 (en) 2023-05-15
CN112406476A (en) 2021-02-26
JP2021032423A (en) 2021-03-01

Similar Documents

Publication Publication Date Title
US7182805B2 (en) Corona-discharge air mover and purifier for packaged terminal and room air conditioners
KR101880631B1 (en) a Heat recovery ventilator and its control method
JP4399469B2 (en) Air conditioner
JP6173459B2 (en) Disinfection device using electric discharge
CN203848404U (en) De-dusting and humidifying air-conditioner
WO2006060451A2 (en) Fanless building ventilator
JP2008190819A (en) Air conditioner
US20210080147A1 (en) Air conditioner
CN112406476B (en) Blower and ventilation system
WO2013065205A1 (en) Device and method for trapping and inactivating micro-organisms and viruses
CN102133419A (en) Air-purifying, sterilizing and heating sterilizer
JP2001248865A (en) Air-cleaning device with ventilation function
CN213272895U (en) Indoor machine of air conditioner
JP6423596B2 (en) Air conditioning system and blower
KR20100005319A (en) Air conditioner with plasma generator & peltier element
CN100360859C (en) Ceiling-buried or under-ceiling air-conditioning units and air cleaning units
JP6120981B2 (en) Air conditioner
CN114440384B (en) Air treatment system
WO2006060440A2 (en) Fanless indoor air quality treatment
JP2002243243A (en) Air conditioner
CN211781474U (en) Fresh air device and air conditioner
JP2002228180A (en) Air conditioner
JP2022024254A (en) Air purification device and air conditioner
JP5472494B2 (en) Air conditioner
KR20040063255A (en) Structure of inside-equipment for air conditioner

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant