JP2019010627A - Air purifying facility - Google Patents

Abstract

To provide an air purifying facility capable of inhibiting adherence of foreign matters such as fine particles or the like to a discharge electrode.SOLUTION: An air purifying facility 100 comprises: an ionizer 50 generating ions in air; a filter 16 provided at the downstream of the ionizer 50 and catching the fine particles in the air, taking a charge by the ions; and an air blow part 80 blowing a compressed air to the ionizer 50.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an air purification device that purifies air.

  Patent Document 1 discloses an air purifier (electric dust collector) that charges and collects dust in the air using a discharge electrode (ionizer).

Japanese Patent Laying-Open No. 2015-188881

  In the air purification device, foreign matter such as fine particles may adhere to the discharge electrode over time. If foreign matter such as fine particles adheres to the discharge electrode, the output of the discharge electrode may be reduced and air purification performance may be reduced.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an air purification device that can suppress the adhesion of foreign matters such as fine particles to an ionizer.

  According to an aspect of the present invention, an air purification device includes an ionizer that generates ions in the air, a filter that is provided downstream of the ionizer and collects particulates in the air charged by the ions, and pressurizes the ionizer. And an air blow unit for blowing the air.

  According to the present invention, foreign matters such as fine particles adhering to the ionizer are blown away by being blown with pressurized air. Thereby, adhesion of foreign substances such as fine particles to the ionizer can be suppressed.

FIG. 1 is a schematic configuration diagram showing an air purification device according to an embodiment of the present invention. FIG. 2 is an enlarged view of the vicinity of the filter according to the embodiment of the present invention. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a cross-sectional view of an ionizer and an air blow unit according to an embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line BB in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a diagram illustrating a schematic configuration of an air conditioner 101 to which an air purification device 100 mounted on a vehicle 1 according to the present embodiment is applied. The air purification device 100 purifies air and supplies it to the room 2 of the vehicle 1. The air purification device 100 is included in the air conditioner 101.

  The air purification device 100 includes a housing 10 (case) in which a flow path 29 is formed, and a blower 17 (blower fan) accommodated in the housing 10. The blower 17 is driven by the electric motor 20 and sends air into the vehicle 1 through the inside of the housing 10. The amount of air blown from the blower 17 (discharged air flow rate per unit time) is switched in multiple stages by the control unit 5 (controller).

  An outside air introduction port 11, an inside air introduction port 12, and an upstream side flow channel 14 are provided on the upstream side of the blower 17 in the flow channel 29 (blower channel) in the housing 10. The outside air inlet 11 is a flow path for introducing air from the outside of the vehicle 1 as indicated by an arrow A1. The inside air introduction port 12 is a flow path for introducing air from the room 2 as indicated by an arrow A2. The inside air inlet 12 is formed so that the channel length is shorter and the channel resistance is smaller than the outside air inlet 11.

  An intake door 13 for opening and closing the outside air inlet 11 and the inside air inlet 12 is provided at the junction of the outside air inlet 11 and the inside air inlet 12. The angle (opening) of the intake door 13 can be changed by the control unit 5. The intake door 13 is switched between the outside air introduction position and the inside air introduction position shown in FIG. 1, and adjusts the mixing ratio of the inside air and the outside air according to the angle. The intake door 13 swings around the swing shaft 13a. The swing shaft 13 a extends on a surface substantially orthogonal to the rotation center axis O with respect to the rotation center axis O of the blower 17.

  The air purifying device 100 is provided in the upstream flow path 14 and generates an ion in the air. The air purifier 100 is provided in the downstream of the ionizer 50 and collects particulates in the air charged by the ions (electrostatic). And a filter).

  As shown in FIG. 4, the ionizer 50 includes a casing 51 in which a hole 52 having an opening 52a is formed, and a discharge needle as a discharge electrode provided in the hole 52 and having a tip 53a extending toward the opening 52a. 53, a ground electrode 54 provided at a distance from the discharge needle 53, and two harnesses 55 connected to the discharge needle 53 and the ground electrode 54, respectively.

  The hole 52 is formed so that the opening 52a opens downward. Thereby, it is possible to prevent foreign matters such as water droplets and dust entering from the outside air introduction port 11 from adhering to the discharge needle 53 and the ground electrode 54.

  The discharge needle 53 has a tip 53a formed in a needle shape and functions as a discharge electrode. The discharge needle 53 is provided in the hole 52 so that the tip 53 a faces the filter 16. As the discharge needle 53 is energized and controlled by the control unit 5, positive ions or negative ions are generated between the discharge needle 53 and the ground electrode 54. Ions generated between the discharge needle 53 and the ground electrode 54 flow in the upstream flow path 14 as indicated by an arrow A3 (see FIG. 1) in the air (for example, PM (Particulate Matter) 2.5). Is charged.

  The discharge needle 53 is provided so that the tip 53a is positioned inside the opening 52a (the opening end of the hole 52). Thereby, when the ionizer 50 is assembled, it is possible to prevent the discharge needle 53 from coming into contact with any member and being damaged.

  As shown in FIGS. 3 and 4, the ionizer 50 is supported by the housing 10 via a rod-shaped bracket 71. The bracket 71 is disposed so as to extend substantially parallel to the swing shaft 13a. The ionizer 50 is provided at the distal end portion of the bracket 71 and is disposed at the approximate center of the upstream flow path 14.

  The bracket 71 is provided with a groove 71 a (see FIG. 5) in which the two harnesses 55 are accommodated, and a through hole 71 b formed so as to penetrate the bracket 71. A base end portion of the bracket 71 is attached to an attachment portion 60 provided in the housing 10 by annular grommets 72 and 73 and two screws 74.

  The attachment portion 60 includes a through hole 61 through which the bracket 71 passes and a pair of boss portions 62 into which two screws 74 are screwed.

  As shown in FIG. 2, the housing 10 is provided with a plurality (three) of through holes 61 (attachment portions 60) for attaching the brackets 71. Each through-hole 61 (attachment part 60) is arrange | positioned so that it may line up in the direction (left-right direction in FIG. 2) substantially orthogonal to the hinge axis | shaft 43. As shown in FIG.

  The housing 10 is formed by dividing the upper and lower members 8 and 9 sandwiching the attachment portion 60. For example, the member 9 on the upper side of the housing 10 is selected and provided in a shape corresponding to a vehicle in which the position of the handle is different on the left and right. When the shape of the housing 10 (member 9) is different depending on the vehicle (vehicle type), the attachment portion 60 to which the bracket 71 is attached is changed. Thereby, the ionizer 50 can be provided at an appropriate position for different vehicles.

  Further, the mounting position of the ionizer 50 can also be changed by changing the length of the bracket 71 or changing the shapes of the grommets 72 and 73 according to the shape of the housing 10.

  The filter 16 is energized so as to carry positive or negative static electricity. The fine particles in the air charged as described above are collected by the filter 16 by the electrostatic force of the filter 16. In this manner, the air flowing through the flow path 29 in the housing 10 is purified by passing through the filter 16 and then sucked into the blower 17. The filter 16 may be fixed to the ground potential (the ground potential of the vehicle body) by being electrically connected to the vehicle body.

  As shown in FIG. 1, a downstream channel 15, a defrost outlet 25, a vent outlet 26, and a foot outlet 27 are provided downstream of the blower 17 in the channel 29 in the housing 10. Air is blown out from the defrost outlet 25 toward the window 3 in the room 2. From the vent outlet 26, air is blown out toward the seat (not shown) in the room 2. Air is blown out from the foot outlet 27 toward the floor (not shown) of the room 2.

  In the downstream flow path 15, an evaporator 18 (heat exchanger for air cooling), a heater core 19 (heat exchanger for air heating), and an air mix door 21 are provided. The air discharged from the blower 17 as indicated by the arrow A4 passes through the evaporator 18 and then the temperature is adjusted through the heater core 19 via the air mix door 21.

  The angle (opening degree) of the air mix door 21 is changed by the control unit 5 to adjust the flow rate of air passing through the heater core 19.

  The defrost outlet 25, the vent outlet 26, and the foot outlet 27 are provided with doors 22 to 24, respectively. The doors 22 to 24 have their respective angles (openings) changed by the control unit 5, and the distribution of the air flow rate blown into the room 2 is changed.

  The intake door 13, the air mix door 21, and the doors 22 to 24 constitute a flow path switching mechanism 30 that switches a flow path 29 (path) through which air flows. In the air conditioner 101, when the length and curvature of the flow path or the flow rate passing through the heater core 19 changes due to the operation of the flow path switching mechanism 30, the flow path resistance applied to the air flow increases or decreases. The channel resistance is smaller in the inside air circulation state in which the inside air introduction port 12 is opened than in the outside air introduction state in which the outside air introduction port 11 is opened. The flow resistance is an internal air circulation state in which the air in the room 2 circulates through the internal air introduction port 12, the upstream flow channel 14, the downstream flow channel 15, and the defrost outlet 25 as indicated by arrows A2 to A6. Becomes the smallest.

  In the air purification apparatus 100 configured as described above, the discharge needle 53 and the ground electrode 54 are exposed to the upstream flow path 14 through which air containing fine particles flows, so that the discharge needle 53 and the ground electrode 54 have fine particles and the like. There is a risk of adhesion. When fine particles adhere to and accumulate on the discharge needle 53 and the ground electrode 54, the amount of ion generation decreases. Thereby, the purification performance of air falls.

  Therefore, the air purification device 100 of the present embodiment includes an air blow unit 80 that blows pressurized air to the discharge needle 53 and the ground electrode 54 of the ionizer 50. Below, the air blow part 80 is demonstrated with reference to FIG.3 and FIG.4.

  The air blow unit 80 includes a tube 81 and a tube 82 that guide air to the hole 52 formed in the housing 51 of the ionizer 50. One end of the tube 81 is connected to the hole 52 of the housing 51, and the other end is connected to one end of a through hole 71 b formed in the bracket 71. One end of the tube 82 is connected to the other end of the through hole 71 b, and the other end is connected to the downstream flow path 15. Thereby, a part of the air discharged from the blower 17 to the downstream flow path 15, that is, a part of the air pressurized by the blower 17 is supplied to the hole 52 of the ionizer 50 through the tube 82, the through hole 71 b and the tube 81. The The air supplied into the hole 52 flows from the proximal end side of the discharge needle 53 toward the distal end 53a and flows out from the opening 52a. That is, the air supplied into the hole 52 is blown against the discharge needle 53 and the ground electrode 54. At this time, foreign matters such as fine particles adhering to the discharge needle 53 and the ground electrode 54 are removed from the discharge needle 53 and the ground electrode 54 by blowing air, and flow out of the opening 52a together with the air.

  As described above, the air purification device 100 according to the present embodiment blows the air pressurized by the air blow unit 80 against the discharge needle 53 and the ground electrode 54 of the ionizer 50. Thereby, the adhesion of foreign matters such as fine particles to the discharge needle 53 and the ground electrode 54 can be suppressed. Further, since the air supplied into the hole 52 is vigorously released from the opening 52a, ions generated between the discharge needle 53 and the ground electrode 54 can be diffused in a wider range. As a result, more fine particles (for example, PM2.5) existing in the upstream flow path 14 can be charged, so that the air purification capability is improved.

  In the said embodiment, the air blow part 80 is comprised by the tube 81, the tube 82, and the through-hole 71b. However, the air blow unit 80 is not limited to this configuration, and for example, the tube 81 may be directly connected to the downstream flow path 15 without providing the tube 82 and the through hole 71b. Further, for example, a separate blower may be provided, and the air pressurized by the blower may be supplied to the ionizer 50 (hole 52). In this case, the air blow part 80 is comprised with the air blower provided separately.

  In addition, the connection between the hole 52 of the housing 51 and the tube 81 is sealed with a caulking material or an O-ring. Thereby, it is possible to prevent water droplets that have entered from the outside air inlet 11 and the like from flowing into the holes 52. In addition, you may seal each connection part of the tube 81, the through-hole 71b, and the tube 82 with a caulking material or an O-ring.

  According to the air purification device 100 configured as described above, the following effects can be obtained.

  The air purification device 100 includes an air blow unit 80 that blows pressurized air onto the ionizer 50.

  According to this configuration, foreign matter such as fine particles adhering to the ionizer 50 (the discharge needle 53 and the ground electrode 54) is blown from the ionizer 50 (the discharge needle 53 and the ground electrode 54) by being blown with pressurized air. It is blown away (removed) and flows out of the opening 52a together with air. Thereby, adhesion and deposition of foreign matters such as fine particles on the ionizer 50 (the discharge needle 53 and the ground electrode 54) can be suppressed. Furthermore, the lifetime of the ionizer 50 (the discharge needle 53 and the ground electrode 54) can be extended.

  In addition, the air purifier 100 can automatically clean the ionizer 50 (the discharge needle 53 and the ground electrode 54) by including the air blow unit 80. Therefore, since the trouble of manually cleaning can be saved, the maintainability is improved.

  Further, since pressurized air is used, the flow rate of air blown against the discharge needle 53 and the ground electrode 54 is increased. Thereby, foreign matters such as fine particles adhering to the discharge needle 53 and the ground electrode 54 can be blown off (removed) more reliably.

  The air purification device 100 further includes a blower 17 that is provided downstream of the filter 16 and sucks and discharges air that has passed through the filter 16, and the air blow unit 80 guides part of the air discharged from the blower 17. Then spray it on the ionizer 50.

  In this configuration, air that has passed through the filter 16 is used as pressurized air that is blown onto the ionizer 50. Thereby, since clean air is sprayed on the ionizer 50 (the discharge needle 53 and the ground electrode 54), it is possible to suppress adhesion of foreign matters due to the pressurized air. Moreover, in this structure, the air discharged from the air blower 17 is used as pressurized air sprayed on the ionizer 50. Thereby, it is not necessary to separately provide a blower only for spraying on the ionizer 50. Therefore, an increase in cost can be suppressed.

  In the air purification device 100, the opening 52a of the housing 51 opens downward.

  According to this configuration, it is possible to prevent foreign matters such as water droplets and fine particles entering from the outside air inlet 11 from adhering to the discharge needle 53 and the ground electrode 54.

  In the air purification device 100, the distal end 53 a of the discharge needle 53 is located inside the opening 52 a of the housing 51.

  According to this configuration, when the ionizer 50 is assembled, the discharge needle 53 can be prevented from coming into contact with any member and being damaged.

  The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

  In the above embodiment, the hole 52 is provided so as to penetrate the housing 51. For example, a hole communicating with the hole 52 is provided on the side surface of the housing 51, and the tube 81 is connected to the hole. May be.

  In the above embodiment, one ionizer 50 is provided, but a plurality of ionizers may be provided. In this case, an air blow unit 80 may be provided for each ionizer 50.

  Moreover, although the said embodiment demonstrated to the example the case where the air purification apparatus 100 was mounted in a vehicle, the air purification apparatus used other than a vehicle may be sufficient.

  In the above embodiment, the ionizer 50 includes the ground electrode 54 as an example. However, the filter 16 may be the ground electrode without providing the ground electrode 54.

DESCRIPTION OF SYMBOLS 100 Air purification apparatus 11 Outside air introduction port 12 Inside air introduction port 14 Upstream flow path 15 Downstream flow path 16 Filter 17 Blower 29 Flow path 50 Ionizer 51 Case 52 Hole 52a Opening 53 Discharge needle (discharge electrode)
53a tip 54 ground electrode 71 bracket 71b through hole 80 air blow part 81 tube 82 tube

Claims (5)

An air purification device for purifying air,
An ionizer that generates ions in the air;
A filter that is provided downstream of the ionizer and collects particulates in the air charged by ions;
An air blow unit that blows pressurized air on the ionizer,
An air purifier characterized by that. The air purification device according to claim 1,
A blower that is provided downstream of the filter and sucks and discharges air that has passed through the filter;
The air blow unit guides a part of the air discharged from the blower and blows it to the ionizer.
An air purifier characterized by that. The air purification device according to claim 1 or 2,
The ionizer is
A housing in which a hole having an opening is formed;
A discharge electrode provided in the hole and having a tip extending toward the opening,
The opening is open downward;
An air purifier characterized by that. The air purification device according to claim 1 or 2,
The ionizer is
A housing in which a hole having an opening is formed;
A discharge electrode provided in the hole and having a tip extending toward the opening,
The tip of the discharge electrode is located inside the opening,
An air purifier characterized by that. The air purification device according to claim 3 or 4,
The air blow unit includes a tube that is connected to the hole and guides air;
The space between the hole and the tube is sealed,
An air purifier characterized by that.

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