JP6698974B1 - Dust collector and air conditioner equipped with a dust collector - Google Patents

Abstract

A plurality of collecting plates whose surfaces are charged by friction, a brush portion that rubs the surface of the collecting plate, and a brush electrically connected to the ground, and the collecting plate and the brush are driven relatively. The drive device, a drive control unit that controls the drive device, and an electrical continuity control device that switches electrical continuity between the brush and the ground in response to a signal from the drive control unit are provided. Does not leak to the ground side and the dust collection performance does not easily deteriorate.

Description

  The present invention relates to a dust collecting device that collects dust in the air by generating static electricity by friction and an air conditioner equipped with the dust collecting device.

  2. Description of the Related Art Conventionally, there are dust collecting devices that generate static electricity to collect dust in the air. As this type of dust collecting device, a plurality of collecting plates arranged at intervals in the direction intersecting with the passage direction of air, and inserted into the gap between the collecting plates and contacting the surface of the collecting plate. And a brush arranged in such a manner (see, for example, Patent Document 1). This dust collecting device rotates the collecting plate, relatively moves the brush and the collecting plate, and rubs the brush and the collecting plate to generate static electricity on the surface of the collecting plate. Dust contained in the air passing between the collecting plates is electrostatically collected. Then, the brush of the dust collecting device scrapes off the dust collected by the collecting plate. In this type of dust collecting device, by connecting the brush to the ground and suppressing the depletion of the charge of the brush, even if the area of the brush is smaller than that of the collecting plate, the surface of the collecting plate is charged with a high charge amount. It is known that it can be triboelectrically charged.

Japanese Patent No. 6498365

  In the dust collection device of Patent Document 1, the grounded brush is constantly in contact with the collection plate. Therefore, when the surface of the collecting plate is contaminated by continuing to use the dust collecting device and the electric resistance value is lowered, the electric charge generated by frictional charging leaks from the surface of the collecting plate to the outside through the brush, There was a possibility that the amount of charge on the collection plate would decrease and the dust collection performance would decrease.

  In order to solve the above problems, it is an object of the present invention to provide a dust collecting device capable of suppressing a decrease in dust collecting performance and an air conditioner equipped with the dust collecting device.

  The dust collecting device according to the present invention has a plurality of collecting plates whose surfaces are charged by friction, and a brush portion that rubs the surfaces of the collecting plates, the brush being electrically connected to the ground, and the collecting plate. And a drive device that relatively drives the brush, a drive control unit that controls the drive device, and an electrical continuity control device that switches electrical continuity between the brush and the ground according to a signal from the drive control unit. And with.

  An air conditioner according to the present invention is equipped with the dust collecting device described above.

  According to the invention, the dust collecting device comprises an electrical continuity control device. The electrical continuity control device can switch electrical continuity between the brush and the ground. Therefore, when the surface of the collecting plate is contaminated, the electric charge charged in the collecting plate is prevented from leaking to the ground side through the brush, and the decrease in the charging amount of the collecting plate is prevented. Therefore, it is possible to realize a dust collecting device in which the dust collecting performance is not easily deteriorated.

It is a figure which shows the outline of the air conditioner carrying the dust collecting device which concerns on Embodiment 1. FIG. 3 is a perspective view of the dust collecting device according to the first embodiment. FIG. 5 is a diagram illustrating a first shaft holding mechanism according to the first embodiment. FIG. 3 is a perspective view illustrating a configuration of a brush included in the dust collecting device according to the first embodiment. FIG. 6 is a diagram illustrating a triboelectric charging operation of the dust collecting device of the first embodiment. FIG. 7 is a perspective view of the dust collecting device according to the second embodiment. It is a perspective view which shows the structure of the dust collecting device which concerns on Embodiment 3.

  Hereinafter, a dust collecting device according to an embodiment and an air conditioner equipped with the dust collecting device will be described with reference to the accompanying drawings. In the following drawings, the same reference numerals are the same or equivalent, and are common to all the texts of the embodiments described below. Further, the forms of the constituent elements shown in the entire specification are merely examples, and the forms are not limited to the forms described in the specification. In particular, the combination of components is not limited to the combination in each embodiment, and the components described in other embodiments can be applied to another embodiment. Further, in the following description, the upper side in the drawing will be referred to as “upper side” and the lower side will be referred to as “lower side”. Furthermore, to facilitate understanding, terms (eg, “right”, “left”, “front”, “rear”, etc.) indicating directions are used as appropriate, but these are for explanation purposes only. It is not limited by the term. Further, regarding the high and low of the humidity and the temperature, the high and the low are not particularly determined in relation to the absolute values, but are relatively determined in the state and operation of the device and the like. Further, in the drawings, the relationship of the size of each component may be different from the actual one.

Embodiment 1.
Here, with reference to FIGS. 1 to 5, a dust collecting device according to Embodiment 1 and an air conditioner equipped with the dust collecting device will be described. FIG. 1 is a diagram schematically showing an air conditioner equipped with the dust collecting device according to the first embodiment. Here, the white arrow shown in FIG. 1 and each of the figures described later indicates the flow of air.

  The air conditioner of the first embodiment includes a dust collection device 1 and a heat exchange ventilation device 10. The air conditioner is housed in the descent ceiling 20 inside the house. The descending ceiling 20 refers to an area in which a part of the ceiling is lowered, as shown in FIG. From the viewpoint of indoor aesthetics, there are many houses in which the air conditioner and other air conditioners are collectively housed in the ceiling 20 as shown in FIG. When the descending ceiling 20 is used as the installation space for the air conditioner, it is possible to generally secure a large installation space as compared with the case where it is installed indoors.

  In FIG. 1, an outdoor air supply port 21 and an outdoor exhaust port 22 are provided on the outdoor wall surface. An indoor air supply port 23 and an indoor exhaust port 24 are provided on the indoor side of the descending ceiling 20. An air supply air passage 30 and an exhaust air passage 40 are formed inside the descending ceiling 20. The air supply air passage 30 is an air passage that takes the outdoor air from the outdoor air supply port 21 into the ceiling 20 and blows the air from the indoor air supply port 23 into the room. The exhaust air passage 40 is an air passage through which the indoor air drops from the indoor exhaust port 24, is taken into the ceiling 20, and is exhausted to the outside from the outdoor exhaust port 22.

  Then, in the air supply air passage 30, the dust collection device 1 and the heat exchange ventilation device 10 are arranged in order from the upstream side. Further, the heat exchange ventilation device 10 is arranged in the exhaust air passage 40. In the air supply air passage 30, the outdoor air supply port 21 and the indoor air supply port 23 are connected by a duct 31 via the dust collection device 1 and the heat exchange ventilation device 10. Further, in the exhaust air passage 40, the indoor exhaust port 24 and the outdoor exhaust port 22 are connected by the duct 41 via the heat exchange ventilation device 10.

  The heat exchange ventilation device 10 is a ventilation device having a ventilation function and an air conditioning auxiliary function. The ventilation function is a function of supplying outdoor air to the room and exhausting indoor air to the outside. As a configuration that realizes this ventilation function, the heat exchange ventilation device 10 includes a fan (not shown) that blows air from the outdoor to the indoor in the air supply air passage 30 and the indoor to the outdoor in the exhaust air passage 40. And a fan (not shown) for blowing air.

  In addition, the air conditioning auxiliary function is a function of assisting the air conditioning operation of a device such as an air conditioner that adjusts the indoor temperature by recovering heat from the exhausted indoor air and applying the recovered heat to the air to be supplied. .. The air conditioning auxiliary function can be said to be an energy saving function because it reduces the energy burden on the equipment. As a configuration that realizes this air conditioning auxiliary function, the heat exchange ventilation device 10 includes a heat exchanger (not shown) that exchanges heat between the air passing through the exhaust air passage 40 and the air passing through the supply air passage 30.

  The dust collection device 1 is a device that collects dust in the outdoor air that has flowed into the ceiling 20 from the outdoor air supply port 21. Details of the dust collecting device 1 according to the first embodiment will be described below. Further, a particle sensor 11a and a particle sensor 11b for detecting the dust concentration of passing air are provided at positions on the upstream side and the downstream side of the dust collection device 1 with respect to the air flow. The upstream particle sensor 11a detects the dust concentration in the outdoor air. Further, the particle sensor 11b on the downstream side detects the dust concentration in the air after dust removal. The detection signals of the particle sensor 11a and the particle sensor 11b are output to the cooperation control unit 25 described later.

  The air conditioner further includes a cooperation control unit 25 that cooperates the operations of the dust collection device 1 and the heat exchange ventilation device 10. The cooperation control unit 25 of the first embodiment is electrically connected to the dust collection device 1 and the heat exchange ventilation device 10 via communication lines, respectively. Further, the cooperation control unit 25 controls the operation of the dust collection device 1 and the heat exchange ventilation device 10 based on the detection signals from the particle sensor 11a and the particle sensor 11b. The cooperation control unit 25 can be configured by hardware such as a circuit device that realizes a control function. Further, the cooperation control unit 25 can be configured by an arithmetic device having a microcomputer or the like, which executes software having a predetermined procedure.

  FIG. 2 is a perspective view of the dust collecting device according to the first embodiment. Further, FIG. 3 is a diagram for explaining the first shaft holding mechanism according to the first embodiment. Then, FIG. 4 is a perspective view illustrating a configuration of a brush included in the dust collecting device according to the first embodiment. Here, since the actual dust collecting device 1 is covered by the housing 15 including the front side which is the front side of the paper surface of FIG. 2, the inside is invisible, but FIG. 2 illustrates the inside. Therefore, the dust collection device 1 is shown with the front side of the housing 15 removed.

  As shown in FIG. 2, the dust collecting device 1 has a configuration in which a plurality of collection plates 2 that are rotationally driven, a plurality of brushes 3, and a dust box 4 are housed in a housing 15. Here, the arrow 12 indicates the forward rotation direction of the collection plate 2.

  The housing 15 has an inlet 14a and an outlet 14b. An air passage 16 through which the air sucked from the suction port 14a is exhausted from the discharge port 14b is formed in the housing 15. As shown in FIG. 1, the dust collecting device 1 is provided in the air supply air passage 30 of the air conditioner. Therefore, the outdoor air flowing in from the outdoor air supply port 21 passes through the dust collecting device 1.

  The collecting plate 2 is, for example, a PP (Poly Propylene) circular plastic plate having a thickness of 1 mm, a diameter of 300 mm, and a negative frictional electrification tendency. However, the material of the collecting plate 2 is not limited to PP, and may be a resin material such as vinyl chloride or PTFE (Poly Tetra Fluoro Ethylene). The collection plates 2 are arranged in a direction intersecting with the passage direction of the outdoor air in the housing 15 at intervals of, for example, 3 mm, and are coupled by the first shaft 8 penetrating the central portion of the collection plate 2. And the whole is integrated. Here, the first shaft 8 can be made of an insulating material.

  As shown in FIG. 3, the dust collecting device 1 of the first embodiment has a bearing 62 as a holding portion that holds the first shaft 8. The bearing 62 is installed on the front surface of the housing 15 and on the wall surface (not shown) on the rear surface facing the front surface. The outer periphery of the bearing 62 is covered with an insulating member 61 so that the triboelectric charge on the surface of the collection plate 2 does not leak to the outside of the housing 15 through the first shaft 8 and the bearing 62. Since the bearing 62 is covered with the insulating member 61, the surface of the collecting plate 2 is contaminated with use, the electric resistance value of the surface of the collecting plate 2 is lowered, and triboelectrified charge is generated through the first shaft 8 and the bearing 62. Leakage to the outside of the body 15 can be suppressed.

  The brush 3 shown in FIG. 4 rubs the surface of the collection plate 2 to charge the surface of the collection plate 2 with static electricity and scrapes off the dust collected by the collection plate 2. As will be described later, each brush 3 of the dust collecting device 1 is electrically connected to the ground so as to charge the collecting plate 2, and a negative charge is supplied from the ground. It is preferable to secure the ground from the power source by using a 3-pin plug or the like. If this is not possible, a cable connection with an object having a large capacitance, such as a device provided in the housing 15 or in the vicinity thereof, can be used instead. The brush 3 is configured, for example, by attaching a brush portion 3b, which is a non-woven fabric of PA6 (Polyamide 6) fiber having a positive frictional electrification tendency, to a rectangular connecting portion 3a of aluminum having a thickness of 1 mm, for example. .. The brush portion 3b is a friction body that is supported by the connecting portion 3a and comes into contact with the surface of the collection plate 2 and rubs against it. Further, the brush portion 3b scrapes off the dust on the collection plate 2. The material of the brush portion 3b is not limited to PA6 fiber, and nylon, cotton, PAN (Polyacrylonitrile) fiber, or the like may be used, for example.

  As shown in FIG. 4, the connecting portion 3a of the brush 3 is provided with two mounting holes 3c, and the second shafts 9 are inserted into the respective mounting holes 3c, so that the brushes 3 are coupled and fixed. .. Here, it is preferable that the fibers of the non-woven fabric in the brush portion 3b serving as the friction body have conductivity by being mixed with carbon, metal and the like. Further, the brush portion 3b may have a brush shape, a sponge shape, or a plate shape, as well as the non-woven cloth shape. Here, an example in which the collection plate 2 is negatively charged has been shown, but the material of the collection plate 2 is PA6, or the friction member of the collection plate 2 is made of PTFE having a strong negative charge tendency. Thus, the collecting plate 2 may be positively charged.

  The brush 3 is inserted in the gap between the collecting plates 2 so that the brush portion 3 b contacts the surface of the collecting plate 2, and is arranged on the downstream side of the collecting plate 2. Further, as shown in FIG. 2, the brush portion 3b of the brush 3 is pressed toward the collecting plate 2 and abuts against each other so that a pressure such as a resin ring spacer is applied between the respective connecting portions 3a. The member 57 is installed so as to pass the second shaft 9.

  Further, the brushes 3 are arranged between the collection plates 2 in a posture along the passage direction of the outdoor air so that the ventilation resistance against the outdoor air passing through the housing 15 is reduced. In this example, the brush 3 is arranged in a horizontal posture. By arranging the brush 3 in this way, it is effective in reducing ventilation resistance. Here, the brush 3 is in contact with a part of the collection plate 2, and the collection plate 2 rotates, whereby the brush 3 moves relatively to the collection plate 2 and the collection plate 2 moves. It is a structure that can contact the whole.

  As shown in FIG. 2, in the housing 15, below the brush 3, the dust box 4 for collecting the aggregates 17 that are the lumps of dust or the like attached to the collection plate 2 and removed by the brush 3 is arranged. Has been done. A first baffle material 18 and a second baffle material 19 are further arranged in the housing 15 so as to face each other with the collection plate 2 interposed therebetween. The first baffle material 18 and the second baffle material 19 rectify the outdoor air flowing into the housing 15 so as to pass through the collection plate 2. The first baffle member 18 is arranged on the inner surface side of the upper surface 15 a of the housing 15 and has a surface shape along the outer peripheral surface of the collection plate 2. On the other hand, the second baffle material 19 is arranged on the inner surface side of the lower surface 15b of the housing 15 and has a flat surface shape. In addition, the second baffle member 19 prevents rattling noise caused by collision of air with the dust box 4 and prevents dust collected in the dust box 4 from rising due to air inflow into the dust box 4. It also plays a role. Therefore, it is desirable that the position where the second baffle material 19 is arranged is equal to or higher than the height of the tip portion 4a of the dust box 4.

  In addition, the dust collection device 1 includes a motor 6 serving as a drive device and a drive control unit 7 that controls the motor 6 outside the housing 15. The motor 6 is connected to the first shaft 8 via a gear, and the driving rotation of the motor 6 causes the first shaft 8 to which the driving force is transmitted to rotate. When the first shaft 8 rotates, the collection plate 2 fixed to the first shaft 8 rotates. In addition, the drive control unit 7 controls each device included in the dust collection device 1. The drive control unit 7 has a microcomputer and the like, and performs processing related to device control based on a predetermined procedure. Further, the drive control unit 7 has an inverter device (not shown) and can adjust the rotation speed of the motor 6.

  Then, as shown in FIG. 2, the dust collecting device 1 of the first embodiment has an electrical continuity control device 58. The electrical continuity control device 58 is installed between each brush 3 and the ground. Further, the electrical continuity control device 58 is connected to the drive control unit 7 by a signal cable (not shown), and the electrical continuity between the brush 3 and the ground is turned on based on a signal from the drive control unit 7. To switch on and off. Here, for the sake of illustration, FIG. 2 illustrates the electrical continuity control device 58 installed outside, but the invention is not limited to this. The electrical continuity control device 58 and the drive control unit 7 may be integrated.

  FIG. 5 is a diagram illustrating a triboelectric charging operation of the dust collecting device according to the first embodiment. The dust collecting device 1 performs a friction charging operation for charging the surface of the collecting plate 2 with static electricity when the dust collecting device 1 is operated for the first time or after being stopped for a long period of one month or more. The electrical continuity control device 58 is normally off. Therefore, each brush 3 is not electrically connected to the ground. When performing the frictional charging operation, first, as shown in FIG. 5A, the drive control unit 7 of the dust collection device 1 turns on the electrical conduction control device 58 to electrically conduct each brush 3 and the ground. Put in a state.

  Next, the drive controller 7 issues a command to the motor 6 to rotate the collecting plate 2. Here, the collection plate 2 is rotated in the forward rotation direction (direction of arrow 12 in FIG. 2) at a speed of 1 [rpm] for 20 seconds. When the collecting plate 2 rotates and the surface of the collecting plate 2 rubs against the brush 3, negative static electricity is generated on the surface of the collecting plate 2. At this time, since each brush 3 is electrically connected to the ground, the charges supplied from the ground do not deplete the charges moving from the brush 3 to the collecting plate 2. Therefore, even if the area of the brush 3 is smaller than that of the collecting plate 2, the surface of the collecting plate 2 is frictionally charged with a high charge amount.

  Here, when the drive control unit 7 rotates the collecting plate 2 for 19 seconds, as shown in FIG. 5B, the electrical continuity control device 58 switches the electrical continuity to OFF and sets the brush. Break the electrical connection between 3 and ground. When 20 seconds have passed and the rotation of the collection plate 2 is stopped, the triboelectrification is completed and the triboelectrification operation is completed. Since the electrical connection between the brush 3 and the ground is cut off, even if the surface of the collecting plate 2 is contaminated and the electric resistance value is lowered, the frictionally charged electric charge is transmitted through the brush 3. It does not leak out of the housing 15. Here, the collection plate 2 may be rotated so that static electricity is generated. The rotation speed, rotation time, and the like shown here are merely examples, and they may be appropriately set according to actual use conditions and the like. Further, the ON and OFF timings of the electrical continuity between the brush 3 and the ground in the electrical continuity control device 58 are merely examples, and they may be appropriately set according to actual use conditions and the like. ..

  Then, after the triboelectric charging operation, when the outdoor air is taken into the dust collecting device 1, the outdoor air is rectified by the first baffle material 18 and the second baffle material 19 and passes through the central portion between the collecting plates 2. .. When the outdoor air passes between the collecting plates 2, the dust 5 in the outdoor air is collected on the surface of the collecting plate 2 by the static electricity generated on the surface of the collecting plate 2.

  Here, since the brushes 3 are arranged between the collection plates 2 in a posture along the air passage direction, for example, in a posture parallel to the air passage direction, the outdoor air passing between the collection plates 2 is arranged. It does not significantly obstruct the flow of air and has little ventilation resistance. Therefore, high dust collection performance can be obtained.

  Further, as the operation of the dust collecting device 1, there are an automatic surface cleaning and an automatic recharging operation of the collecting plate 2 (hereinafter, referred to as a cleaning and charging operation). In the cleaning/charging operation, first, as in the initial friction charging operation described above, the drive control unit 7 of the dust collecting device 1 sends a command signal to the motor 6 to move the collecting plate 2 at a speed of 1 [rpm]. Rotate forward for 20 seconds. When the collecting plate 2 rotates and the surface of the collecting plate 2 rubs against the brush 3, the dust adhering to the surface of the collecting plate 2 is wiped off by the brush 3 and the collecting plate 2 is triboelectrically charged. In other words, the rotation of the collecting plate 2 both removes the dust that has adhered to the collecting plate 2 and frictionally charges the collecting plate 2. Here, a part of the dust adheres to the lower part of the brush 3 as an aggregate 17, and when the aggregate 17 becomes a certain size or more, it falls by gravity and the dust box 4 provided under the brush 3 Will be collected.

  As described above, according to the dust collecting device 1 of the first embodiment, the electrical continuity control device 58 that switches the electrical continuity between the brush 3 and the ground on and off based on the signal from the drive controller 7. Have. For this reason, even if the surface of the collecting plate 2 is contaminated, the electric charges charged in the collecting plate 2 do not leak to the outside of the housing 15, so the dust collecting device 1 and the dust collecting device 1 in which the dust collecting performance is difficult to deteriorate It is possible to realize an air conditioner equipped with.

Embodiment 2.
The dust collecting device 1 according to the second embodiment basically has the same configuration as the dust collecting device 1 according to the first embodiment. The dust collecting device 1 according to the second embodiment differs from the dust collecting device 1 according to the first embodiment in that it includes a potential detecting device 59. Hereinafter, the dust collecting device 1 of the second embodiment will be described focusing on the points different from the dust collecting device 1 of the first embodiment. The configuration of the dust collecting device 1 not described in the second embodiment is similar to that described in the first embodiment.

  FIG. 6 is a perspective view of the dust collecting device according to the second embodiment. As shown in FIG. 6, the dust collecting device 1 of the second embodiment has a potential detecting device 59. The potential detecting device 59 is a vibrating surface potential sensor that detects the surface potential of the collection plate 2. However, the potential detecting device 59 is not limited to the vibration type surface potential sensor. For example, by connecting a resistor having a known value between the brush 3 and the ground and detecting a weak current amount flowing through the resistor with an ammeter, the potential is indirectly estimated from Ohm's law and detected. Good. As a result, the potential and the like can be determined from the degree of decrease in dust collection efficiency or the dirt on the collection plate 2, the brush 3, and the like. The potential detecting device 59 according to the second embodiment is attached through the housing 15 from above the collecting plate 2 and is connected to the electrical continuity control device 58 and the drive control unit 7 by a signal cable.

  Next, the operation of the air conditioner according to Embodiment 2 will be described. Here, the operation different from that of the dust collecting device 1 of the first embodiment will be mainly described. Here, in particular, the drive control unit 7 interlocks with the electrical continuity control device 58 and the potential detection device 59, and issues an operation instruction to each device.

  In the dust collecting device 1 of the first embodiment described above, an example in which the triboelectric charging operation is performed with the collection plate 2 rotating for 20 seconds has been shown. However, the maximum amount of charge on the surface of the collecting plate 2 due to frictional charging changes under the influence of the temperature and humidity of the atmosphere and the degree of dirt on the surface of the collecting plate. Therefore, when the rubbing operation is defined by the rotation time of the collection plate 2, the collection plate 2 can effectively collect dust depending on the temperature and humidity of the atmosphere and the degree of dirt on the surface of the collection plate 2. There is a possibility that the triboelectrification operation may be completed in a state where sufficient charging has not been performed.

  Therefore, in the dust collecting device 1 according to the second embodiment, when the collecting plate 2 is rotating due to the frictional charging operation, the drive control unit 7 causes the surface potential of the collecting plate 2 detected by the potential detecting device 59. Based on the above, the determination regarding the charging of the collecting plate 2 is performed. Here, the surface of the collection plate 2 is frictionally charged and electric charges accumulate with the frictional charging operation time, and the surface potential detected by the potential detecting device 59 increases. When the drive control unit 7 determines that the increase in the surface potential of the collection plate 2 is saturated, the drive control unit 7 ends the frictional charging operation. Before the frictional charging operation is completed, as described in the first embodiment, the drive control unit 7 sends a signal to the electrical continuity control device 58, and the electrical continuity control device 58 turns off the electrical continuity. Switching to break the electrical connection between the brush 3 and ground. As a result, it is possible to prevent the frictional charging operation from being stopped in a state where the collection plate 2 is not sufficiently charged, and the air conditioning operation to be performed while the dust collection performance remains insufficient.

  As described above, the dust collecting device 1 of the second embodiment has the same effect as that of the first embodiment. Furthermore, the dust collecting device 1 according to the second embodiment includes the potential detecting device 59 that detects the potential on the surface of the collecting plate 2. Therefore, until the drive control unit 7 determines that the collection plate 2 is sufficiently charged, the frictional charging operation can be performed, and the temperature and humidity of the atmosphere in the dust collection device 1 and the surface of the collection plate 2 can be performed. Insufficient triboelectrification due to the effect of dirtiness can be suppressed. Therefore, it is possible to realize the dust collecting device 1 capable of exhibiting stable dust collecting performance and the air conditioner equipped with the dust collecting device 1.

Embodiment 3.
The dust collecting device 1 according to the third embodiment basically has the same configuration as the dust collecting device 1 according to the third embodiment. The dust collecting device 1 of the third embodiment differs from the dust collecting device 1 of the first embodiment in that an air filter 52 is provided. Hereinafter, the dust collecting device 1 of the third embodiment will be described focusing on the points different from the dust collecting device 1 of the first embodiment. The configuration of the dust collecting device 1 not described in the third embodiment is the same as that described in the first embodiment.

  FIG. 7 is a perspective view showing the configuration of the dust collecting device according to the third embodiment. As shown in FIG. 7, the dust collecting device 1 according to the third embodiment includes an air filter 52 that collects dust at the discharge port 14b on the downstream side of the housing 15. As the air filter 52, here, a HEPA filter obtained by molding a PP meltblown charged nonwoven fabric into a pleated shape is used. The HEPA filter has a high fiber density and a high dust collection rate.

  By providing the air filter 52 on the downstream side of the housing 15 as in the dust collecting device 1 of the third embodiment, the air from which dust and the like in the air is removed by the collecting plate 2 is further cleaned. , High dust collection performance can be obtained.

  As described above, the dust collecting device 1 of the third embodiment has the same effect as that of the first embodiment. Furthermore, in the dust collecting device 1 of the third embodiment, the air from which dust and the like have been removed by the collecting plate 2 of the dust collecting device 1 can be further cleaned by the air filter 52, and high dust collecting performance can be obtained. be able to. Here, since the HEPA filter used as the air filter 52 has a high fiber density and is relatively quickly clogged by the collected dust and increases the pressure loss, maintenance such as filter replacement is recommended every few months. .. The dust collecting device 1 according to the third embodiment has a configuration in which the collecting plate 2 is provided on the upstream side of the HEPA filter with respect to the flow of air. Therefore, the dust load on the HEPA filter can be reduced by removing the dust upstream of the HEPA filter. This moderates the increase in pressure loss due to clogging of the HEPA filter. Therefore, the maintenance period of the HEPA filter can be extended, and high dust collection performance and long-term dust collection can both be achieved.

Fourth Embodiment
Although the brush 3 is inserted into the gap between the collecting plates 2 from the downstream side to the upstream side of the collecting plates 2 in the first to third embodiments described above, It is not limited to. For example, the brush 3 may be inserted from the upstream side of the collection plate 2 toward the downstream side into the gap of the collection plate 2. In the case of this configuration, the dust box 4 may be similarly arranged below the brush 3.

  1 Dust Collection Device, 2 Collection Plate, 3 Brush, 3a Connecting Part, 3b Brush Part, 3c Mounting Hole, 4 Dust Box, 4a Tip Part, 5 Dust, 6 Motor, 7 Drive Control Part, 8 First Shaft, 9th 2 shafts, 10 heat exchange ventilation device, 11a particle sensor, 11b particle sensor, 12 arrow, 14a inlet, 14b outlet, 15 housing, 15a upper surface, 15b lower surface, 16 air passage, 17 aggregate, 18 1st baffle Material, 19 Second baffle material, 20 Drop ceiling, 21 Outdoor air supply port, 22 Outdoor air exhaust port, 23 Indoor air supply port, 24 Indoor air exhaust port, 25 Cooperative control unit, 30 Air supply air passage, 31, 41 duct, 40 Exhaust air passage, 52 Air filter, 57 Pressurizing member, 58 Electrical continuity control device, 59 Potential detecting device, 61 Insulating member, 62 Bearing.

Claims (9)

A plurality of collection plates whose surface is charged by friction,
A brush having a brush portion that rubs the surface of the collecting plate, and a brush electrically connected to the ground,
A drive device that relatively drives the collection plate and the brush;
A drive control unit for controlling the drive device,
A dust collecting device comprising: an electrical continuity control device that switches electrical continuity between the brush and the ground in response to a signal from the drive control unit. The dust collection device according to claim 1, comprising a plurality of the collection plates and a plurality of the brushes that are arranged by being inserted between the plurality of collection plates.   The electrical continuity control device electrically connects the brush and the ground before charging the collecting plate, and the drive controller drives the driving device to charge the collecting plate. The dust collecting device according to claim 2, wherein the electrical connection between the brush and the ground is cut off later. A shaft for transmitting the driving force of the driving device to the collecting plate;
A holding portion for holding the shaft,
The said holding part is a dust collection device as described in any one of Claims 1-3 which has an insulating member.   The dust collecting device according to claim 4, wherein the shaft is made of an insulating material.   The dust collection device according to any one of claims 1 to 5, further comprising a potential detection device that detects a potential of the collection plate.   The dust collection device according to claim 6, wherein the drive control unit controls driving of the drive device and switching of electrical conduction in the electrical conduction control device based on a potential detected by the potential detection device.   The collector according to any one of claims 1 to 7, further comprising an air filter installed downstream of the collecting plate with respect to a flow of air and configured to collect dust that has passed through the collecting plate. Dust device.   An air conditioner equipped with the dust collecting device according to any one of claims 1 to 8.

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