JPWO2020250263A1 - Dust collector and air conditioner equipped with dust collector - Google Patents

Abstract

The dust collecting devices are arranged in the air passage through which the air passes at intervals in a direction intersecting the air passing direction, and are contacted with a plurality of collecting plates charged by friction to collect the dust. A friction body that rubs the plate and a drive control unit that controls the relative movement between the collection plate and the friction body based on the humidity of the air passing through the collection plate are provided to reduce the amount of charge in the collection plate. It suppresses and collects dust efficiently.

Description

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

Conventionally, there is a dust collecting device that generates static electricity and collects dust in the air. As this type of dust collecting device, a plurality of collecting plates arranged at intervals in a direction intersecting the air passing direction are inserted into a gap between the collecting plates and come into contact with the surface of the collecting plates. Some are provided with brushes arranged in such a manner (see, for example, Patent Document 1). This dust collecting device generates static electricity on the surface of the collecting plate by rotating the collecting plate and rubbing it against the brush, and electrostatically collects the dust contained in the air passing between the collecting plates. Gather.

Japanese Unexamined Patent Publication No. 61-227860

In the dust collecting device of Patent Document 1, the surface of the collecting plate is rubbed by the brush, and an electric charge is induced on the surface of the collecting plate. Then, the collection plate is charged with static electricity. Here, when high-humidity air flows in, moisture adheres to the surface of the collection plate, and the electrical resistance of the surface decreases. Therefore, the electric charge generated on the surface of the collection plate moves, and the amount of electric charge decreases. Since there is a positive correlation between the amount of charge and the ability to collect dust, when high-humidity air flows in, the amount of charge decreases, and as a result, the ability to collect dust decreases. On the other hand, there is a limit to the improvement of the dust collecting ability, and even if the collecting plate is rubbed more than necessary in the triboelectric charging operation, the power efficiency becomes poor.

In order to solve the above problems, the present invention is equipped with a dust collecting device and an air conditioner equipped with a dust collecting device capable of efficiently performing a friction charging operation to collect dust while suppressing a decrease in dust collecting ability. The purpose is to provide an opportunity.

The dust collecting device according to the present invention is arranged in an air passage through which air passes at intervals in a direction intersecting the air passing direction, and comes into contact with a plurality of collecting plates charged by friction and the collecting plates. It is provided with a friction body that rubs the collection plate and a drive control unit that controls the relative movement between the collection plate and the friction body based on the humidity of the air passing through the collection plate.

Further, the air conditioner according to the present invention is equipped with the above-mentioned dust collecting device.

According to the present invention, the drive control unit controls the relative movement between the friction body and the collection plate based on the humidity of the air passing through the collection plate. Therefore, for example, when the humidity is high, the charge amount of the collection plate can be controlled by increasing the contact between the friction body and the collection plate and increasing the charge amount of the collection plate. .. Therefore, it is possible to realize a dust collecting device that suppresses a decrease in the amount of charge due to air humidity, reduces a decrease in the dust collecting ability, and efficiently collects dust.

It is a figure which shows the outline of the air conditioner equipped with the dust collecting device which concerns on Embodiment 1. FIG. It is a perspective view of the dust collecting device which concerns on Embodiment 1. FIG. It is a perspective view of the brush which the dust collecting device which concerns on Embodiment 1 has. It is a figure which shows the flowchart explaining the operation of the dust collecting device 1 which concerns on Embodiment 1. FIG. It is a perspective view which shows the structure of the dust collecting device 1 which concerns on Embodiment 2. FIG. It is a figure which shows the outline of the air conditioner equipped with the dust collector which concerns on Embodiment 3. FIG. It is a perspective view of the dust collecting device which concerns on Embodiment 4. FIG. It is a figure which shows the flowchart explaining the operation of the dust collecting device 1 which concerns on Embodiment 4. FIG. It is a perspective view of the dust collecting device which concerns on Embodiment 5. It is a figure which shows the flowchart explaining the operation of the dust collecting device 1 which concerns on Embodiment 5.

Hereinafter, the dust collector and the air conditioner according to the embodiment will be described with reference to the accompanying drawings and the like. In the following drawings, those having the same reference numerals are the same or equivalent thereof, and are common to all the texts of the embodiments described below. The form of the component represented in the entire specification is merely an example, and is not limited to the form 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 figure will be referred to as "upper side" and the lower side will be referred to as "lower side". Further, for ease of understanding, directional terms (eg, "right", "left", "front", "rear", etc.) are used as appropriate, but they are for illustration purposes only. Not limited by term. In addition, the humidity and temperature are not determined in relation to the absolute values, but are relatively determined in the state and operation of the device or the like. Then, in the drawings, the relationship between the sizes of the constituent members may differ from the actual one.

Embodiment 1.
Here, the dust collecting device according to the first embodiment and the air conditioner equipped with the dust collecting device will be described with reference to FIGS. 1 to 4. FIG. 1 is a diagram showing an outline of an air conditioner equipped with a dust collector according to the first embodiment. Here, the white arrows shown in FIG. 1 and each figure described later indicate the air flow.

The air conditioner of the first embodiment includes a dust collecting device 1 and a heat exchange ventilation device 10. The air conditioner is housed in the descending ceiling 20 in the room of the house. As shown in FIG. 1, the descending ceiling 20 refers to an area in which a part of the ceiling is lowered. From the viewpoint of indoor aesthetics, there are many houses in which an air conditioner and other air conditioners are collectively stored in the lowered ceiling 20 as shown in FIG. When the lowered ceiling 20 is used as the installation space for the air conditioner, a large installation space can be generally secured as compared with the case where the air conditioner 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. Further, on the indoor side of the falling ceiling 20, an indoor air supply port 23 and an indoor exhaust port 24 are provided. An air supply air passage 30 and an exhaust air passage 40 are formed in the descending ceiling 20. The air supply air passage 30 is an air passage that lowers the outdoor air from the outdoor air supply port 21, takes it into the ceiling 20, and blows it into the room from the indoor air supply port 23. The exhaust air passage 40 is an air passage that lowers indoor air from the indoor exhaust port 24, takes it into the ceiling 20, and exhausts it to the outside through the outdoor exhaust port 22.

A dust collecting device 1 and a heat exchange ventilation device 10 are arranged in the air supply air passage 30 in order from the upstream side. Further, a 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 a dust collecting device 1 and a 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 a duct 41 via a heat exchange ventilation device 10. The dust collecting device 1 and the heat exchange ventilation device 10 are connected by a communication line 25 and can communicate with each other.

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 the indoor air to the outside. As a configuration for realizing this ventilation function, the heat exchange ventilation device 10 includes a fan (not shown) that blows air from the outside to the inside of the air supply air passage 30 and an exhaust air passage 40 from the inside to the outside. It has a fan (not shown) that blows air.

The air-conditioning assist function is a function that assists the air-conditioning operation of equipment that adjusts the room temperature, such as an air conditioner, by recovering heat from the exhausted indoor air and giving 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 is a function that reduces the energy burden on the equipment. As a configuration for realizing this air conditioning assist 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 air supply air passage 30.

The dust collecting device 1 is a device that collects dust in the outdoor air that has fallen from the outdoor air supply port 21 and has flowed into the ceiling 20. Details of the dust collecting device 1 according to the first embodiment will be described below.

FIG. 2 is a perspective view of the dust collecting device according to the first embodiment. Further, FIG. 3 is a perspective view of a brush included in the dust collecting device according to the first embodiment. The dust collecting device 1 has a configuration in which a plurality of collecting plates 2, a plurality of brushes 3, and a dust box 4 that are rotationally driven in the rotation direction 50 are housed in a housing 15.

The housing 15 has a suction port 14a and a discharge port 14b. An air passage 16 is formed in the housing 15 in which the air sucked from the suction port 14a is exhausted from the discharge port 14b. 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 collection plate 2 is, for example, a circular plastic plate of PP (Poly Polypropylene) having a thickness of 1 mm, a diameter of 300 mm, and a negative triboelectric tendency. However, the material of the collecting plate 2 is not limited to PP, and may be, for example, a resin material such as vinyl chloride or PTFE (PolyTetraFluoroEthylene). A plurality of collection plates 2 are arranged in a direction intersecting the passage direction of outdoor air in the housing 15, for example, at intervals of 3 mm, and are connected by a first shaft 8 penetrating the central portion of the collection plate 2. And the whole is integrated.

The brush 3 rubs the surface of the collecting plate 2, charges the surface of the collecting plate 2 with static electricity, and removes the dust collected by the collecting plate 2. The brush 3 has, for example, a structure in which a non-woven fabric 3b of PA6 (Polyamide 6) fiber having a positive triboelectric tendency is attached to, for example, a rectangular support plate 3a made of aluminum having a thickness of 1 mm. The non-woven fabric 3b becomes a friction body. However, the material of the non-woven fabric 3b is not limited to PA6, and may be, for example, nylon or cotton. As shown in FIG. 3, two mounting holes 3c are formed in the support plate 3a of the brush 3, and the second shaft 9 is inserted into each mounting hole 3c to connect the brushes 3. Here, it is desirable that the fibers of the non-woven fabric 3b have conductivity by being mixed with carbon, metal and the like. Here, an example in which the collection plate 2 is negatively charged is shown, but the material of the collection plate 2 may be PA6, or PTFE having a strong negative charging tendency may be used as the material of the friction body of the collection plate 2. The collection plate 2 may be positively charged.

The brush 3 is inserted into the gap between the collection plates 2 so that the non-woven fabric 3b comes into contact with the surface of the collection plate 2, and is arranged on the downstream side of the collection plate 2. Further, the brush 3 is arranged between the collection plates 2 in a posture along the passing direction of the outdoor air so that the ventilation resistance to the outdoor air passing through the housing 15 is reduced. In the dust collecting device 1 of the first embodiment, the brush 3 is arranged in a horizontal posture. By arranging the brush 3 in this way, it is effective in reducing the ventilation resistance. Further, each brush 3 is connected to the ground. Here, the brush 3 comes into contact with a part of the collection plate 2, and the rotation of the collection plate 2 causes the brush 3 to move relative to the collection plate 2 so that the collection plate 2 It is a structure that comes into contact with the whole. Therefore, it is possible to suppress an increase in torque due to friction during rotational drive. When most of the collecting plate 2 is rubbed at one time, the torque increases and a large amount of frictional heat is generated, resulting in a large energy loss. However, in this configuration, the frictional heat is suppressed and the energy loss is suppressed. Is possible. Here, an example in which the brush 3 is arranged on the downstream side of the collection plate 2 is shown, but the brush 3 may be arranged on the upstream side of the collection plate 2.

In the housing 15, a dust box 4 is arranged below the brush 3 to collect agglomerates 17 which are lumps of dust and the like adhering to the collecting plate 2 and removed by the brush 3. Further, in the housing 15, the first baffle material 18 and the second baffle material 19 are further arranged so as to face each other with the collecting plate 2 interposed therebetween. The first baffle material 18 and the second baffle material 19 rectify the outdoor air that has flowed into the housing 15 so as to pass through the collection plate 2. The first baffle material 18 is arranged on the inner surface side of the upper surface 15a of the housing 15. The second baffle material 19 is arranged on the inner surface side of the lower surface 15b of the housing 15.

Further, the dust collecting device 1 includes a motor 6 and a drive control unit 7 for controlling the motor 6 outside the housing 15. The motor 6 is connected to the first shaft 8 via a gear, and the rotation of the motor 6 causes the first shaft 8 to rotate. When the first shaft 8 rotates, the collection plate 2 fixed to the first shaft 8 rotates. A humidity sensor 11 serving as a humidity detection device for detecting the humidity of air is provided on the downstream side of the collection plate 2 in the dust collection device 1. By providing the humidity sensor 11 on the downstream side of the collection plate 2, the air from which dust has been removed by the collection plate 2 passes through the humidity sensor 11. Therefore, the adhesion of dust to the humidity sensor 11 is reduced, and the humidity can be detected accurately for a long time. A signal including the detected humidity data detected by the humidity sensor 11 is output to the drive control unit 7.

The drive control unit 7 controls each device included in the dust collecting device 1. The drive control unit 7 has a microcomputer or the like, and performs processing related to control of the device based on a predetermined procedure. Further, it has an energization control device (not shown) for controlling energization of the motor 6, and can adjust the rotation speed of the motor 6. Here, in particular, when performing a triboelectric charging operation for charging the surface of the collecting plate 2, the rotation speed of the motor 6 is adjusted, and the rotation of the collecting plate 2 is controlled in speed, time, and cycle to capture. The relative movement control between the collecting plate 2 and the non-woven fabric 3b of the brush 3 is performed.

FIG. 4 is a diagram showing a flowchart for explaining the operation of the dust collecting device 1 according to the first embodiment. Next, the operation of the dust collecting device 1 according to the first embodiment will be described with reference to FIG. Here, in particular, the control processing operation of the drive control unit 7 will be mainly described. When the operation of the dust collecting device 1 is started, a triboelectric charging operation for charging the surface of the collecting plate 2 with static electricity is performed (step S01). In this triboelectric charging operation, the collection plate 2 rotates and the surface of the collection plate 2 rubs against the brush 3, so that the collection plate 2 is triboelectrically charged. Therefore, a command is sent from the drive control unit 7 of the dust collecting device 1 to the motor 6 to rotate the collecting plate 2. At this time, the humidity sensor 11 detects the humidity of the air flowing in the air passage and sends a signal including the detected humidity data to the drive control unit 7. The drive control unit 7 receives a signal including the detected humidity data detected by the humidity sensor 11.

The drive control unit 7 compares the detected humidity data included in the received signal with the preset humidity set value, and determines whether or not the detected humidity is lower than the humidity set value (step S02). When the drive control unit 7 determines that the detected humidity is "low" as a result of comparing the detected humidity with the humidity set value, the drive control unit 7 shifts to the low humidity mode (step S03). In the low humidity mode, the drive control unit 7 sends a rotation command to the motor 6 to rotate at a constant rotation speed Va [rpm] (step S04). When the drive control unit 7 determines that Ta [seconds] have elapsed for a certain period of time (step S05), the drive control unit 7 sends a rotation stop command for stopping the motor 6 (step S09).

On the other hand, in step S02, when the drive control unit 7 determines that the detected humidity is "high", the mode shifts to the high humidity mode (step S06). In the high humidity mode, the drive control unit 7 sends a rotation command to the motor 6 to rotate at a constant rotation speed Vb [rpm] (step S07). When it is determined that Tb [seconds] have elapsed for a certain period of time (step S08), a rotation stop command for stopping the motor 6 is sent (step S09).

In step S06, the drive control unit 7 determines whether or not Ts [seconds] have elapsed for a certain period of time after the motor 6 is stopped (step S10). When the drive control unit 7 determines that Ts [seconds] have elapsed for a certain period of time, the drive control unit 7 again receives a signal including the detected humidity data detected by the humidity sensor 11 (step S11). The drive control unit 7 compares the detected humidity data included in the received signal with the preset humidity set value (step S12). Here, it is assumed that step S02 and step S12 have the same humidity setting value, but different setting values may be used. Then, the drive control unit 7 determines the waiting time Tw [seconds] until the next triboelectric charging operation is performed based on the comparison result between the detected humidity and the humidity set value (step S13). After Tw [seconds] have elapsed (step S14), the triboelectric charging operation is started again, and the process returns to step S01.

At high humidity, the resistance on the surface of the resin plate decreases, and charging is unlikely to occur. Therefore, in order to achieve the predetermined charge amount, it is desirable that the friction operation is faster than in low humidity and is performed for a long time. Therefore, it is desirable that the rotation speed that is the relative movement speed is Vb [rpm]> Va [rpm], and the rotation time that is the relative movement time is Tb [seconds]> Ta [seconds]. Further, when the humidity is high, the rate of decrease in charge on the resin surface becomes high, so it is desirable to accelerate the cycle (rotation cycle) until the next triboelectric charge operation in order to maintain the predetermined charge amount. Therefore, the waiting time Tw [seconds] changes according to the detected humidity, and it is desirable to set the waiting time shorter as the humidity increases.

Here, it is desirable to change all of the above-mentioned rotation speed, rotation time, and rotation cycle settings according to the humidity, but it is also possible to change only one of the parameters. Further, in the above example, the humidity is determined only as "high" and "low", but a medium humidity mode or the like may be provided by setting a fine judgment standard and making a judgment such as "medium". In the medium humidity mode, the rotation speed is preferably the speed between Vb [rpm] and Va [rpm], and the rotation time is preferably the time between Tb [seconds] and Ta [seconds].

When the outdoor air is taken into the dust collecting device 1 after the triboelectric charging operation described above, 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 collection plates 2, the dust 5 in the outdoor air is collected on the surface of the collection plate 2 by the static electricity generated on the surface of the collection plate 2. When the triboelectric charging operation is performed, the dust adhering to the surface of the collecting plate 2 is collected by the brush 3, and a part of the dust adheres to the lower part of the brush 3 as an agglomerate 17. When the size of the agglomerate 17 becomes larger than a certain size, it falls by gravity and is collected in the dust box 4 provided in the lower part of the brush 3.

In order to promote the removal of the agglomerates 17 adhering to the brush 3, the drive control unit 7 sets the collection plate 2 in the rotation direction of the triboelectric operation after step S05 or step S08 of the triboelectric operation. It can be rotated half a turn (hereinafter referred to as a reverse half turn) in the direction opposite to 50. When the drive control unit 7 rotates the collection plate 2 in the reverse half rotation, the agglomerates 17 adhering to the brush 3 fall and are collected in the dust box 4. Here, the collection plate 2 has been described as being rotated in the reverse half, but the amount of rotation is merely an example, and a combination operation of rotation in the reverse direction and rotation in the forward direction may be performed.

Here, as shown in FIG. 1, the dust collecting device 1 and the heat exchange ventilation device 10 in the subsequent stage are connected by a communication line 25 or the like that communicates operation information, and the operation information of the friction charging operation of the dust collecting device 1 is obtained. It is sent to a control unit (not shown) in the heat exchange ventilator 10. When the dust collecting device 1 is performing the rotary motion of step S05 of the friction charging operation, the operation of the heat exchange ventilation device 10 is adjusted to slow down the flow velocity of the air flowing in the dust collecting device 1, or heat exchange. The operation of the ventilation device 10 is stopped. As a result, it is possible to prevent the dust separated from the collection plate 2 from being swept by the wind and flowing downstream, and to ensure the collection into the dust box 4.

As described above, according to the dust collecting device 1 of the first embodiment, when the drive control unit 7 performs the triboelectric charging operation of the collecting plate 2, it passes through the collecting plate 2 sent from the humidity sensor 11. Based on the detected humidity of air, the relative movement control between the non-woven fabric 3b of the brush 3 and the collection plate 2 is performed. Therefore, when the drive control unit 7 determines that high humidity air is passing through, the drive control unit 7 controls the motor 6 to increase the rotation speed of the collection plate 2 and increase the rotation time of the brush. By increasing the contact between the non-woven fabric 3b of 3 and the collecting plate 2, the charge amount of the collecting plate 2 is increased. Further, if the amount of charge required for dust collection is secured, the power consumption can be suppressed by suppressing the rotation speed of the motor 6. Therefore, it is possible to obtain a dust collecting device 1 that suppresses a decrease in the amount of charge due to air humidity, reduces a decrease in the dust collecting ability, and efficiently collects dust.

Further, in the dust collecting device 1 of the first embodiment, the humidity sensor 11 is installed at a position downstream of the collecting plate 2 with respect to the air flow. Therefore, the air collected by the collection plate 2 passes through the humidity sensor 11, so that the adhesion of dust to the humidity sensor 11 can be reduced, and the humidity can be detected accurately for a long time. ..

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, but is different in that it includes an air filter. Hereinafter, the difference between the dust collecting device 1 of the second embodiment and the dust collecting device 1 of the first embodiment will be mainly described. The configuration not described in the dust collecting device 1 of the second embodiment is the same as that of the dust collecting device 1 of the first embodiment.

FIG. 5 is a perspective view showing the configuration of the dust collecting device 1 according to the second embodiment. In FIG. 5, the devices and the like having the same reference numerals as those in FIG. 2 perform the same functions as those described in the first embodiment. As shown in FIG. 5, the dust collecting device 1 of the second embodiment includes an air filter 42 for collecting dust at a discharge port 14b on the downstream side of the housing 15. As the air filter 42, a HEPA filter obtained by molding a PP melt blown charged non-woven fabric into a pleated shape is used here. The HEPA filter has a high fiber density and a high dust collection rate.

By providing the air filter 42 on the downstream side of the housing 15 as in the dust collecting device 1 of the second embodiment, the air from which the dust and the like in the air have been removed by the collecting plate 2 can be further purified. , High dust collection performance can be obtained. Here, in the dust collecting device 1 of the first embodiment, a humidity sensor 11 for detecting the humidity of air is provided on the downstream side of the collecting plate 2 in the dust collecting device 1. In the dust collecting device 1 of the second embodiment, the humidity sensor 11 is provided on the downstream side of the air filter 42.

As described above, according to the dust collecting device 1 of the second embodiment, the same effect as that of the dust collecting device 1 of the first embodiment can be obtained, and the humidity sensor 11 is provided on the downstream side of the air filter 42. Therefore, the humidity sensor 11 can pass highly purified air. Therefore, it is possible to reduce the adhesion of dust to the humidity sensor 11, and the humidity can be detected accurately for a long time. As a result, it is possible to realize the dust collecting device 1 in which the triboelectric charging operation is appropriately performed and the dust collecting ability is not reduced due to the decrease in the charging amount.

Here, the humidity sensor 11 may be provided in the heat exchange ventilation device 10 located at the subsequent stage of the dust collecting device 1. Further, as shown in FIG. 5, the dust collecting device 1 may have a communication device 11A or the like instead of the humidity sensor 11. The communication device 11A sends a signal including data on the humidity around the installation location of the dust collecting device 1 sent from the external device to the drive control unit 7. Since the communication device does not need to be installed inside the air passage, it is installed outside the air passage.

Embodiment 3.
The air conditioner according to the third embodiment basically has the same configuration as the air conditioner according to the first embodiment, but has a heat exchange ventilator 10 or a dehumidifier in front of the dust collecting device 1. It differs in that it has a humidity reduction device. Here, the heat exchange ventilation device 10 will be described as the humidity reduction device.

FIG. 6 is a diagram showing an outline of an air conditioner equipped with the dust collector according to the third embodiment. In the air conditioner of FIG. 6, when the humidity is high, the heat exchange ventilation device 10 or the dehumidifying device operates to perform a humidity lowering process for lowering the humidity of the inflowing air. As a result, air having a humidity lower than that of the outside air flows into the collecting plate 2 in the dust collecting device 1 located at the subsequent stage. Therefore, it is possible to realize the dust collecting device 1 in which the dust collecting ability is not reduced due to the decrease in the charge amount of the collecting plate 2, and the decrease in the dust collecting ability of the air conditioner as a whole can be suppressed.

Embodiment 4.
FIG. 7 is a perspective view of the dust collecting device according to the fourth embodiment. In FIG. 7, the devices and the like having the same reference numerals as those in FIG. 2 perform the same functions as those described in the first embodiment. The dust collecting device 1 according to the fourth embodiment basically has the same configuration as the dust collecting device 1 according to the first embodiment or the second embodiment, but has a temperature detecting device in the dust collecting device 1. The difference is that the temperature sensor 12 is further arranged. The temperature sensor 12 detects the temperature of the air that has passed through the collection plate 2.

FIG. 8 is a diagram showing a flowchart for explaining the operation of the dust collecting device 1 according to the fourth embodiment. Next, the operation of the dust collecting device 1 according to the fourth embodiment will be described with reference to FIG.

When the operation of the dust collecting device 1 is started, a triboelectric charging operation for charging the surface of the collecting plate 2 with static electricity is performed (step S21). In this triboelectric charging operation, the collection plate 2 rotates and the surface of the collection plate 2 rubs against the brush 3, so that the collection plate 2 is triboelectrically charged. Therefore, a command is sent from the drive control unit 7 of the dust collecting device 1 to the motor 6 to rotate the collecting plate 2. At this time, the humidity sensor 11 and the temperature sensor 12 detect the humidity and temperature of the air flowing in the air passage, respectively, and send a signal including the detected humidity data and a signal including the detected temperature data to the drive control unit 7. .. The drive control unit 7 receives a signal including the detected humidity data and the detected temperature data detected by the humidity sensor 11 and the temperature sensor 12, respectively.

The drive control unit 7 compares the detected humidity data included in the received signal with the preset humidity set value, and determines whether or not the detected humidity is lower than the humidity set value (step S22). Further, the drive control unit 7 compares the detected temperature data included in the received signal with the preset temperature set value, and determines whether or not the detected temperature is lower than the temperature set value (step S23). And step S24).

When the drive control unit 7 determines that the detected humidity is "low" in step S22 and further determines that the detected temperature is "low" in step S23, the drive control unit 7 shifts to the low humidity and low temperature mode (step S25). In the low humidity and low temperature mode, the drive control unit 7 sends a rotation command to the motor 6 to rotate at a constant rotation speed Vc [rpm] (step S26). When the drive control unit 7 determines that Tc [seconds] have elapsed for a certain period of time (step S27), the drive control unit 7 sends a rotation stop command for stopping the motor 6 (step S37).

Further, when the drive control unit 7 determines that the detected humidity is "low" in step S22 and further determines that the detected temperature is "high" in step S23, the drive control unit 7 shifts to the low humidity and high temperature mode (step S28). In the low humidity and high temperature mode, the drive control unit 7 sends a rotation command to the motor 6 to rotate at a constant rotation speed Vd [rpm] (step S29). When the drive control unit 7 determines that Td [seconds] have elapsed for a certain period of time (step S30), the drive control unit 7 sends a rotation stop command for stopping the motor 6 (step S37).

Further, when the drive control unit 7 determines that the detected humidity is “high” in step S22 and further determines that the detected temperature is “low” in step S24, the drive control unit 7 shifts to the high humidity / low temperature mode (step S31). In the high humidity and low temperature mode, the drive control unit 7 issues a rotation command to the motor 6 at a constant rotation speed Ve [rpm] (step S32). When the drive control unit 7 determines that Te [seconds] have elapsed for a certain period of time (step S33), the drive control unit 7 sends a rotation stop command for stopping the motor 6 (step S37).

Then, when the drive control unit 7 determines that the detected humidity is "high" in step S22 and further determines that the detected temperature is "high" in step S24, the drive control unit 7 shifts to the high humidity and high temperature mode (step S34). In the high humidity and high temperature mode, the drive control unit 7 sends a rotation command to the motor 6 to rotate at a constant rotation speed Vf [rpm] (step S35). When the drive control unit 7 determines that Tf [seconds] have elapsed for a certain period of time (step S36), the drive control unit 7 sends a rotation stop command for stopping the motor 6 (step S37).

In step S37, the drive control unit 7 determines whether or not Ts [seconds] have elapsed for a certain period of time after the motor 6 is stopped (step S38). When the drive control unit 7 determines that Ts [seconds] have elapsed for a certain period of time, the drive control unit 7 again receives a signal including the detected humidity data and the detected temperature data detected by the humidity sensor 11 and the temperature sensor 12, respectively (step S39). .. The drive control unit 7 compares the detected humidity data included in the received signal with the preset humidity set value. Further, the detection temperature data is compared with the preset temperature set value (step S40). Here, it is assumed that step S22 and step S40 have the same humidity setting value, and step S23 and step S40 have the same temperature setting value, but different setting values may be used. Then, the drive control unit 7 determines the waiting time Tw [seconds] until the next triboelectric charging operation is performed based on the comparison result (step S41). After Tw [seconds] have elapsed (step S42), the triboelectric charging operation is started again, and the process returns to step S21.

At high humidity, the resistance on the surface of the resin plate decreases, and charging is unlikely to occur. Further, when the temperature is low, the amount of water adsorbed by the collecting plate 2 increases, so that the resistance on the surface of the resin plate tends to decrease. Therefore, in order to achieve the predetermined charge amount, it is desirable that the friction operation at high humidity is faster than at low humidity and is performed for a long time. Further, the friction operation at low temperature is faster than that at high temperature, and it is desirable to perform the friction operation for a long time.

Therefore, the rotation speed that is the relative movement speed is Ve [rpm]> Vf [rpm]> Vc [rpm]> Vd [rpm], and the rotation time that is the relative movement time is Te [seconds]> Tf [seconds]. > Tc [seconds]> Td [seconds]. When the rate of decrease in charge on the resin surface is high, it is desirable to increase the cycle (rotational cycle) until the next triboelectric charge operation in order to maintain the predetermined charge amount. Therefore, it is desirable that the waiting time Tw [seconds] be changed according to the detected humidity and the detected temperature. Here, it is desirable to change all of the above-mentioned rotation speed, rotation time, and rotation cycle settings according to the humidity, but it is also possible to change only one of the parameters.

As described above, according to the dust collecting device 1 of the fourth embodiment, the drive control unit 7 and the non-woven fabric 3b of the brush 3 are based on the detected humidity and the detected temperature sent from the humidity sensor 11 and the temperature sensor 12. The relative movement control with the collecting plate 2 is performed. Therefore, when the drive control unit 7 determines that the charge amount of the collection plate 2 is likely to decrease, for example, in high humidity and low temperature air, the rotation speed is increased and the rotation time is lengthened. Then, the contact between the non-woven fabric 3b and the collection plate 2 is increased to increase the charge amount of the collection plate 2. Therefore, it is possible to obtain a dust collecting device 1 that suppresses a decrease in the amount of charge due to air humidity, reduces a decrease in the dust collecting ability, and efficiently collects dust. Further, if the amount of charge required for dust collection is secured, power consumption can be suppressed and dust can be collected efficiently by suppressing the rotation speed of the motor 6.

Further, in the dust collecting device 1 of the first embodiment, the temperature sensor 12 is installed at a position downstream of the collecting plate 2 with respect to the air flow. Therefore, the air collected by the collection plate 2 passes through the temperature sensor 12, so that the adhesion of dust to the temperature sensor 12 can be reduced, and the humidity can be detected accurately for a long time. ..

Embodiment 5.
FIG. 9 is a perspective view of the dust collecting device according to the fifth embodiment. In FIG. 9, the devices and the like having the same reference numerals as those in FIG. 2 perform the same functions as those described in the first embodiment. The dust collecting device 1 according to the fifth embodiment basically has the same configuration as the dust collecting device 1 according to the first embodiment, the second embodiment, or the third embodiment. In the dust collecting device 1 of the fifth embodiment, instead of arranging the humidity sensor 11 and the temperature sensor 12, the charging amount sensor 13 serving as the charging amount detecting device is arranged in the dust collecting device 1. -It is different from the dust collecting device 1 of the fourth embodiment. In the dust collecting device of the fifth embodiment, the charge amount sensor 13 is a surface electrometer that reads the potential of the surface of the object to be measured, a charge amount meter (coulomb meter) that reads the amount of charge, or a sensor having the same function as these. be.

In the first to fourth embodiments, the amount of charge on the surface of the collection plate 2 is predicted based on the humidity of the air flowing into the dust collection device 1, friction rotation control is performed, and the collection plate is controlled. The amount of charge on the surface of No. 2 was increased. The dust collecting device 1 of the fifth embodiment has a charge amount sensor 13 and detects the charge amount of the collection plate 2. The drive control unit 7 performs friction rotation control based on the measured charge amount.

FIG. 10 is a diagram showing a flowchart for explaining the operation of the dust collecting device 1 according to the fifth embodiment. Next, the operation of the dust collecting device 1 according to the fifth embodiment will be described with reference to FIG.

When the operation of the dust collecting device 1 is started, a triboelectric charging operation for charging the surface of the collecting plate 2 with static electricity is performed (step S51). In this triboelectric charging operation, the collection plate 2 rotates and the surface of the collection plate 2 rubs against the brush 3, so that the collection plate 2 is triboelectrically charged. Therefore, a command is sent from the drive control unit 7 of the dust collecting device 1 to the motor 6 to rotate the collecting plate 2. At this time, the charge amount sensor 13 detects the charge amount on the surface of the collection plate 2 and sends a signal including the detected charge amount data to the drive control unit 7.

The drive control unit 7 compares the detected charge amount data included in the received signal with the preset charge amount set value, and determines whether the detected charge amount is lower than the charge amount set value. (Step S52). When the drive control unit 7 determines that the detected charge amount is "high" as a result of comparing the detected charge amount with the charge amount set value, the drive control unit 7 shifts to the high charge amount mode (step S53). In the high charge amount mode, the drive control unit 7 sends a rotation command to the motor 6 to rotate at a constant rotation speed Vg [rpm] (step S54). When the drive control unit 7 determines that Tg [seconds] have elapsed for a certain period of time (step S55), the drive control unit 7 sends a rotation stop command for stopping the motor 6 (step S59).

On the other hand, in step S52, when the drive control unit 7 determines that the detected charge amount is "low", the mode shifts to the low charge amount mode (step S56). In the low charge amount mode, the drive control unit 7 sends a rotation command to the motor 6 to rotate at a constant rotation speed Vh [rpm] (step S57). When it is determined that Th [seconds] have elapsed for a certain period of time (step S58), a rotation stop command for stopping the motor 6 is sent (step S59).

In step S56, the drive control unit 7 determines whether or not Ts [seconds] have elapsed for a certain period of time after the motor 6 is stopped (step S60). When the drive control unit 7 determines that Ts [seconds] have elapsed for a certain period of time, the drive control unit 7 again receives a signal including the detected charge amount data detected by the charge amount sensor 13 (step S61). The drive control unit 7 compares the detected charge amount data included in the received signal with the preset charge amount set value (step S62). Here, it is assumed that step S52 and step S62 have the same charge amount set value, but different set values may be used. Then, the drive control unit 7 determines the waiting time Tw [seconds] until the next triboelectric charging operation is performed based on the comparison result between the detected charge amount and the charge amount set value (step S63). After Tw [seconds] have elapsed (step S64), the triboelectric charging operation is started again, and the process returns to step S51.

When the amount of charge on the surface of the collection plate 2 is low, it is desirable that the friction operation is fast and the operation is performed for a long time in order to achieve the predetermined amount of charge. Therefore, it is desirable that the rotation speed that is the relative movement speed is Vh [rpm]> Vg [rpm], and the rotation time that is the relative movement time is Th [second]> Tg [second]. Further, when the charge amount on the surface of the collection plate 2 is lower than the predetermined charge amount, it is desirable to immediately perform the next triboelectric charge operation. Therefore, it is desirable to set the waiting time Tw [seconds] to 0 [seconds] and start the next triboelectric charging operation. Here, it is desirable to change all the settings of the rotation speed, the rotation time, and the rotation cycle described above according to the amount of charge, but it is also possible to change only one of the parameters.

Embodiment 6.
In the above-described first to fifth embodiments, the drive control unit 7 determines the rotation speed, rotation time, and rotation cycle of the collection plate 2 in the triboelectric charging operation based on the determined mode, and collects the collection plate 2. The drive control of the motor 6 for rotating the plate 2 was performed. However, it is not limited to this. The drive control of the motor 6 may be performed by determining any one or two of the rotation speed, the rotation time, and the rotation cycle.

1 Dust collection device, 2 Collection plate, 3 Brush, 3a Support plate, 3b Non-woven fabric, 3c Mounting hole, 4 Dust box, 4a Tip, 5 Dust, 6 Motor, 7 Drive control unit, 8 1st shaft, 9 2nd Shaft, 10 heat exchange ventilator, 11 humidity sensor, 11A communication device, 12 temperature sensor, 13 charge sensor, 14a inlet, 14b outlet, 15 housing, 15a upper surface, 15b lower surface, 16 air passage, 17 aggregate , 18 1st baffle material, 19 2nd baffle material, 20 falling ceiling, 21 outdoor air supply port, 22 outdoor exhaust port, 23 indoor air supply port, 24 indoor exhaust port, 25 communication line, 30 air supply air passage, 31, 41 ducts, 40 exhaust air passages, 42 air filters, 50 rotation directions.

The dust collecting device according to the present invention is arranged in an air passage through which air passes at intervals in a direction intersecting the air passing direction, and comes into contact with a plurality of collecting plates charged by friction and the collecting plates. provided by relatively moving a friction member frictionally the collecting plate, based on the humidity of the air passing through the collecting plate, and a drive control unit for controlling the relative movement between the collecting plate and the friction member It is a thing.

Claims (15)

A plurality of collection plates arranged at intervals in a direction intersecting the air passage direction in the air passage through which the air passes, and charged by friction.
With a friction body that comes into contact with the collection plate and rubs the collection plate,
A dust collecting device including a drive control unit that controls relative movement between the collecting plate and the friction body based on the humidity of the air passing through the collecting plate. A humidity detection device for detecting the humidity of the air passing through the collection plate is provided.
The dust collecting device according to claim 1, wherein the drive control unit controls relative movement between the collecting plate and the friction body based on a signal including the humidity data sent from the humidity detecting device. The dust collecting device according to claim 2, wherein the humidity detecting device is installed on the downstream side of the collecting plate with respect to the air flow. The dust collecting device according to claim 2, wherein the humidity detecting device is a communication device installed outside the air passage and receiving a signal including the humidity data sent from an external device. When the drive control unit determines that the humidity value of the air passing through the collection plate is higher than the preset humidity setting value, the relative movement speed between the collection plate and the friction body is increased. The collection according to any one of claims 1 to 4, wherein the relative movement control is performed based on one or more of the following, increasing the relative movement time, and shortening the relative movement cycle. Dust device. A temperature detection device for detecting the temperature of the air passing through the collection plate is provided.
The drive control unit further controls the relative movement of the friction body and the collection plate based on a signal including temperature data sent from the temperature detection device, according to any one of claims 2 to 5. The dust collecting device according to one item. The dust collecting device according to claim 6, wherein the temperature detecting device is installed on the downstream side of the collecting plate with respect to the air flow. When the drive control unit determines that the temperature value of the air passing through the collection plate is lower than the preset temperature set value, the relative movement speed between the collection plate and the friction body is increased. The dust collecting device according to claim 6 or 7, wherein the relative movement control is performed based on one or more of the following, increasing the relative movement time, and shortening the relative movement cycle. A plurality of collection plates arranged at intervals in a direction intersecting the air passage direction in the air passage through which the air passes, and charged by friction.
With a friction body that moves the collection plate relatively and rubs the surface of the collection plate,
A dust collecting device including a drive control unit that controls relative movement between the collecting plate and the friction body based on the amount of charge on the surface of the collecting plate. A charge amount detecting device for detecting the charge amount on the surface of the collection plate is provided.
The dust collecting device according to claim 9, wherein the drive control unit controls relative movement between the friction body and the collecting plate based on a signal including data of the charging amount sent from the charging amount detecting device. .. The dust collecting device according to claim 10, wherein the charge amount detecting device is installed on the downstream side of the collecting plate with respect to the air flow. When the drive control unit determines that the charge amount on the surface of the collection plate is smaller than the preset charge amount set value, the drive control unit increases the relative moving speed between the collection plate and the friction body. The dust collecting device according to any one of claims 9 to 11, wherein the relative movement control is performed based on one or more of increasing the relative movement time and shortening the relative movement cycle. .. Any one of claims 1 to 12, wherein the drive control unit rotationally drives the collecting plate with respect to the fixed friction body, and relatively moves the collecting plate and the friction body. The dust collecting device according to one item. An air conditioner equipped with the dust collecting device according to any one of claims 1 to 13. The air equipped with the dust collecting device according to claim 14, further comprising a humidity reducing device installed on the upstream side of the dust collecting device with respect to the air flow and reducing the humidity of the air passing through the dust collecting device. Harmony machine.

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