CN113924166A - Dust collecting device and air conditioner having the same - Google Patents
Dust collecting device and air conditioner having the same Download PDFInfo
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- CN113924166A CN113924166A CN201980097091.6A CN201980097091A CN113924166A CN 113924166 A CN113924166 A CN 113924166A CN 201980097091 A CN201980097091 A CN 201980097091A CN 113924166 A CN113924166 A CN 113924166A
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- 230000007423 decrease Effects 0.000 abstract description 17
- 238000007600 charging Methods 0.000 description 14
- 239000004745 nonwoven fabric Substances 0.000 description 12
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 229920002292 Nylon 6 Polymers 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
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- 229920001155 polypropylene Polymers 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 229940058401 polytetrafluoroethylene Drugs 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- -1 Poly Propylene Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007786 electrostatic charging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/28—Plant or installations without electricity supply, e.g. using electrets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/68—Control systems therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrostatic Separation (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The dust collecting device comprises: a plurality of collecting plates arranged at intervals in a direction intersecting with a direction of air passage in an air passage through which the air passes, and charged by friction; a friction body contacting and rubbing the capture plate; and a drive control unit that controls relative movement between the collection plate and the friction body based on the humidity of the air passing through the collection plate, and that can suppress a decrease in the amount of charge of the collection plate and efficiently collect dust.
Description
Technical Field
The present invention relates to a dust collector that generates static electricity by friction and collects dust in air, and an air conditioner having the dust collector mounted thereon.
Background
Conventionally, there are dust collectors which generate static electricity and collect dust in air. As such a dust collector, there is a dust collector including a plurality of collecting plates arranged at intervals in a direction intersecting with a direction of air passage, and a brush arranged to be inserted into a gap between the collecting plates and to be in contact with surfaces of the collecting plates (see, for example, patent document 1). In this dust collector, static electricity is generated on the surface of the collecting plate by rubbing the collecting plate with a brush while rotating the collecting plate, and dust contained in air passing between the collecting plates is collected by the static electricity.
Prior art documents
Patent document
Patent document 1: japanese laid-open patent publication No. 61-227860
Disclosure of Invention
Problems to be solved by the invention
In the dust collector disclosed in patent document 1, the surface of the collecting plate is rubbed with a brush to induce an electric charge on the surface of the collecting plate. Then, the capture plate is charged by electrostatic charging. When air with high humidity flows in, moisture adheres to the surface of the collection plate, and the electrical resistance of the surface decreases. Therefore, the charges generated on the surface of the collecting plate move, and the charge amount decreases. Since the charge amount has a positive correlation with the dust trapping ability, the charge amount decreases when a high humidity air flows, and as a result, the dust trapping ability decreases. On the other hand, there is a limit to the improvement of the dust trapping ability, and even if the trapping plate is excessively rubbed during the frictional electrification operation, the efficiency of the electric power is deteriorated.
In order to solve the above-described problems, an object of the present invention is to provide a dust collecting device and an air conditioner having the dust collecting device mounted thereon, which can suppress a decrease in dust collecting ability and can perform a frictional electrification operation efficiently to collect dust.
Means for solving the problems
The dust collector of the invention comprises: a plurality of collecting plates arranged at intervals in a direction intersecting with a direction of air passage in an air passage through which the air passes, and charged by friction; a friction body contacting and rubbing the capture plate; and a drive control unit that controls the relative movement between the capture plate and the friction body based on the humidity of the air passing through the capture plate.
The air conditioner of the present invention is equipped with the dust collecting device.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, the drive control section performs the relative movement control at 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 collecting plate can be controlled by means of increasing the contact between the friction body and the collecting plate to increase the charge amount of the collecting plate. Therefore, it is possible to realize a dust collector that can efficiently collect dust while suppressing a decrease in the amount of charge caused by the humidity of the air and reducing a decrease in the dust collecting ability.
Drawings
Fig. 1 is a schematic view showing an air conditioner with a dust collecting device according to embodiment 1 mounted thereon.
Fig. 2 is a perspective view of the dust collecting device according to embodiment 1.
Fig. 3 is a perspective view of a brush included in the dust collecting device according to embodiment 1.
Fig. 4 is a flowchart illustrating the operation of the dust collection device 1 according to embodiment 1.
Fig. 5 is a perspective view showing the structure of the dust collecting device 1 according to embodiment 2.
Fig. 6 is a schematic view showing an air conditioner with a dust collecting device according to embodiment 3 mounted thereon.
Fig. 7 is a perspective view of the dust collecting device according to embodiment 4.
Fig. 8 is a flowchart illustrating the operation of the dust collection device 1 according to embodiment 4.
Fig. 9 is a perspective view of the dust collecting device according to embodiment 5.
Fig. 10 is a flowchart illustrating the operation of the dust collection device 1 according to embodiment 5.
Detailed Description
Hereinafter, a dust collecting device and an air conditioner according to an embodiment will be described with reference to the drawings and the like. In the following drawings, the same or corresponding portions are denoted by the same reference numerals and are common throughout the embodiments described below. The form of the constituent elements shown throughout the specification is merely an example, and is not limited to the form described in the specification. In particular, the combination of the components is not limited to the combination in each embodiment, and the components described in other embodiments can be applied to another embodiment. In the following description, the upper side in the drawing is referred to as "upper side" and the lower side is referred to as "lower side". For easy understanding, terms indicating directions (for example, "right", "left", "front", "rear", and the like) and the like are used as appropriate, but they are used for explanation and are not limited by these terms. The humidity and temperature are not particularly specified in relation to absolute values, but are relatively specified in the state, operation, and the like of the device and the like. In the drawings, the size relationship of each component may be different from the actual one.
A dust collecting device and an air conditioner having the dust collecting device according to embodiment 1 will be described with reference to fig. 1 to 4. Fig. 1 is a schematic view showing an air conditioner with a dust collecting device according to embodiment 1 mounted thereon. Here, the hollow arrows illustrated in fig. 1 and the later-described drawings show the flow of air.
The air conditioner of embodiment 1 includes a dust collector 1 and a heat exchange ventilator 10. The air conditioner is housed in a sunken ceiling 20 in a room of a house. As shown in fig. 1, the sunk ceiling 20 refers to a region where a portion of the ceiling is sunk. In view of the interior appearance, many houses house air conditioners, other air conditioners, and the like are housed together in the ceiling 20 as shown in fig. 1. When the sunk ceiling 20 is used as an installation space of the air conditioner, a larger installation space can be generally secured as compared with the case of installation in a room.
In fig. 1, an outdoor air supply port 21 and an outdoor air discharge port 22 are provided on an outdoor wall surface. Further, an indoor air supply port 23 and an indoor air discharge port 24 are provided on the indoor side of the sunk ceiling 20. Further, an air supply duct 30 and an air discharge duct 40 are formed in the sunken ceiling 20. Supply air duct 30 is an air duct for taking outdoor air from outdoor air supply port 21 into sunken ceiling 20 and sending the air from indoor air supply port 23 to the indoor. The exhaust air duct 40 is an air duct for taking indoor air into the sunken ceiling 20 from the indoor exhaust port 24 and exhausting the air to the outside from the outdoor exhaust port 22.
Further, in the air supply air passage 30, the dust collector 1 and the heat exchange ventilator 10 are arranged in this order from the upstream side. The heat exchange ventilator 10 is disposed 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 collector 1 and the heat exchange ventilator 10. In the exhaust air passage 40, the indoor exhaust port 24 and the outdoor exhaust port 22 are connected by a duct 41 via the heat exchange ventilator 10. The dust collector 1 is connected to the heat exchange ventilator 10 by a communication line 25, and can communicate with each other.
The heat exchange ventilator 10 has a ventilation function and an air conditioning auxiliary function. The ventilation function is a function of supplying outdoor air to the indoor space and discharging indoor air to the outdoor space. As a configuration for realizing this ventilation function, the heat exchange ventilator 10 includes a fan (not shown) that blows air from the outside to the inside of the room in the supply air duct 30 and a fan (not shown) that blows air from the inside to the outside of the room in the exhaust air duct 40.
The air conditioning auxiliary function is a function of recovering heat from discharged indoor air and supplying the recovered heat to supplied air to assist air conditioning operation of a device such as an air conditioner that adjusts the indoor temperature. Since the air conditioning auxiliary function is a function of reducing the energy burden in the equipment, it can also be said to be an energy saving function. As a configuration for realizing this air conditioning auxiliary function, the heat exchange ventilator 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 collector 1 is a device for collecting dust in outdoor air flowing into the sunken ceiling 20 from the outdoor air supply port 21. The following describes details of the dust collecting device 1 according to embodiment 1.
Fig. 2 is a perspective view of the dust collecting device according to embodiment 1. Fig. 3 is a perspective view of a brush included in the dust collecting device according to embodiment 1. The dust collector 1 has a structure in which a plurality of collecting plates 2, a plurality of brushes 3, and a dust box 4, which are rotationally driven in a rotational direction 50, are accommodated in a housing 15.
The frame 15 has an intake port 14a and an exhaust port 14 b. An air passage 16 for discharging the air sucked from the suction port 14a from the discharge port 14b is formed in the housing 15. As shown in fig. 1, the dust collector 1 is provided in an air supply passage 30 of an air conditioner. Therefore, the outdoor air flowing in from the outdoor air supply port 21 passes through the dust collection container 1.
The collection plate 2 is, for example, a circular plastic plate of PP (Poly Propylene) having a thickness of 1mm and a diameter of 300mm and a negative triboelectric charging tendency. However, the material of the collecting plate 2 is not limited to PP, and may be a resin material such as polyvinyl chloride or PTFE (Polytetra Fluoro Ethylene). The collecting plate 2 is arranged in plurality at intervals of, for example, 3mm in a direction intersecting with a direction of passage of the outdoor air in the housing 15, and is integrally joined and integrated by a first shaft 8 penetrating through a central portion of the collecting plate 2.
The brush 3 rubs the surface of the collecting plate 2 to electrostatically charge the surface of the collecting plate 2 and sweep off the dust collected by the collecting plate 2. The brush 3 is configured by, for example, attaching a nonwoven fabric 3b of, for example, PA6(Polyamide 6: Polyamide 6) fibers having a positive triboelectric charging tendency to a rectangular support plate 3a of aluminum having a thickness of 1 mm. The nonwoven fabric 3b becomes a friction body. However, the material of the nonwoven fabric 3b is not limited to PA6, and may be, for example, nylon, cotton, or the like. As shown in fig. 3, two mounting holes 3c are opened in the support plate 3a of the brush 3, and the second shaft 9 is inserted into each of the mounting holes 3c to couple the brushes 3. Here, the fibers of the nonwoven fabric 3b are preferably fibers having conductivity mixed with carbon, metal, or the like. Here, an example in which the collection plate 2 is negatively charged is shown, but the collection plate 2 may be positively charged by using PTFE or the like having a strong negative charge tendency as the material of the collection plate 2, for example, PA6 or the material of the friction member of the collection plate 2.
The brush 3 is inserted into the gap between the collecting plates 2 so that the nonwoven fabric 3b contacts the surface of the collecting plates 2, and is disposed downstream of the collecting plates 2. The brushes 3 are disposed between the collecting plates 2 in a posture along the direction of passage of the outdoor air so as to reduce the ventilation resistance against the outdoor air passing through the inside of the housing 15. In the dust collecting device 1 of embodiment 1, the brush 3 is disposed in a horizontal posture. By configuring the brush 3 in this manner, it is effective to reduce the ventilation resistance. Further, all the brushes 3 are connected to the ground. Here, the brush 3 has the following structure: the brush 3 is moved relative to the collection plate 2 by rotating the collection plate 2 while contacting a part of the collection plate 2, and thereby contacts the whole collection plate 2. Therefore, an increase in torque due to friction during rotational driving can be suppressed. If a large part of the collecting plate 2 is rubbed at once, the torque increases, and a large amount of frictional heat is generated, and the energy loss increases. Here, an example in which the brush 3 is disposed on the downstream side of the collection plate 2 is shown, but the brush 3 may be disposed on the upstream side of the collection plate 2.
In the frame body 15, a dust box 4 for collecting aggregates 17 is disposed below the brush 3, and the aggregates 17 are blocks of dust and the like attached to the collecting plate 2 and removed by the brush 3. Further, a first baffle member 18 and a second baffle member 19 are disposed in the frame 15 so as to face each other with the collection plate 2 interposed therebetween. The first baffle member 18 and the second baffle member 19 rectify the outdoor air flowing into the housing 15 so as to pass through the collecting plate 2. The first barrier member 18 is disposed on the inner surface side of the upper surface 15a of the frame 15. The second shutter 19 is disposed on the inner surface side of the lower surface 15b of the frame 15.
The dust collector 1 further includes a motor 6 and a drive control unit 7 for controlling the motor 6, outside the housing 15. The motor 6 is coupled to the first shaft 8 via a gear, and the first shaft 8 is rotated by the rotation of the motor 6. When the first shaft 8 rotates, the capture plate 2 fixed to the first shaft 8 rotates. A humidity sensor 11 is provided on the downstream side of the collecting plate 2 in the dust collecting device 1, and the humidity sensor 11 is a humidity detection means for detecting the humidity of air. By providing the humidity sensor 11 on the downstream side of the collecting plate 2, the air from which the dust has been removed by the collecting plate 2 passes through the humidity sensor 11. Therefore, adhesion of dust to the humidity sensor 11 can be reduced, and humidity can be detected for a long time with high accuracy. A signal including data of the detected humidity detected and obtained 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 collector 1. The drive control unit 7 includes a microcomputer or the like, and performs processing related to control of the device based on a predetermined procedure. Further, an energization control device (not shown) for controlling energization to the motor 6 is provided, and the rotation speed of the motor 6 can be adjusted. Here, particularly when the frictional electrification operation for electrifying the surface of the collection plate 2 is performed, the rotation of the collection plate 2 is controlled in terms of speed, time, and cycle by adjusting the rotation speed of the motor 6, thereby controlling the relative movement of the collection plate 2 and the nonwoven fabric 3b of the brush 3.
Fig. 4 is a flowchart illustrating the operation of the dust collection device 1 according to embodiment 1. Next, the operation of the dust collector 1 according to embodiment 1 will be described with reference to fig. 4. Here, the description will be mainly focused on the control processing of the drive control unit 7. When the operation of the dust collecting device 1 is started, the frictional electrification operation for electrostatically charging the surface of the collecting plate 2 is performed (step S01). In this frictional electrification operation, the surface of the collection plate 2 is rubbed against the brush 3 by rotating the collection plate 2, thereby frictionally electrifying the collection plate 2. Therefore, a command is sent from the drive control unit 7 of the dust collection 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 transmits a signal including data of the detected humidity to the drive controller 7. The drive control unit 7 receives a signal containing data of the detected humidity detected by the humidity sensor 11.
The drive control unit 7 compares the detected humidity data included in the received signal with a 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" after comparing the detected humidity with the humidity set value, it 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 determining that the fixed time Ta [ sec ] has elapsed (step S05), the drive control unit 7 transmits a rotation stop command to stop the motor 6 (step S09).
On the other hand, when the drive control unit 7 determines that the detected humidity is "high" in step S02, the mode is shifted to the high humidity mode (step S06). In the high humidity mode, the drive control unit 7 transmits a rotation command to rotate the motor 6 at a constant rotation speed Vb [ rpm ] (step S07). When it is determined that the predetermined time Tb [ sec ] has elapsed (step S08), a rotation stop command for stopping the motor 6 is transmitted (step S09).
After stopping the motor 6 in step S06, the drive control unit 7 further determines whether a fixed time Ts [ sec ] has elapsed (step S10). When determining that the fixed time Ts [ sec ] has elapsed, the drive control unit 7 receives a signal including the data of the detected humidity detected by the humidity sensor 11 again (step S11). The drive control unit 7 compares the detected humidity data included in the received signal with a preset humidity set value (step S12). Here, the humidity set value in step S02 is the same as that in step S12, but may be a different set value. Then, the drive control unit 7 determines a waiting time Tw [ sec ] until the next frictional electrification operation is performed based on the comparison result between the detected humidity and the humidity set value (step S13). After Tw [ seconds ] has elapsed (step S14), the frictional electrification operation is started again, and the process returns to step S01.
When the humidity is high, the resistance of the surface of the resin plate is reduced, and charging is less likely to occur. Therefore, in order to achieve a predetermined charge amount, it is preferable to perform the rubbing operation faster and longer than in the case of low humidity. Therefore, it is preferable that the rotation speed for the relative movement speed is Vb [ rpm ] > Va [ rpm ], and the rotation time for the relative movement time is Tb [ sec ] > Ta [ sec ]. Further, since the rate of decrease in the electrification of the resin surface is increased when the humidity is high, it is preferable to increase the cycle (rotation cycle) until the next frictional electrification operation in order to maintain a predetermined amount of electrification. Therefore, the waiting time Tw [ sec ] varies depending on the detected humidity, and is preferably set to be shorter as the humidity is higher.
Here, the settings of the rotation speed, the rotation time, and the rotation period are preferably all changed in accordance with the humidity, but only any one of the parameters may be changed. In the above example, the determination of the humidity is only "high" or "low", but the determination may be made in such a manner that the determination criterion is set finely and the "medium" or the like is set, or the medium humidity mode is set. In the middle humidity mode, it is preferable that the rotation speed is a speed between Vb [ rpm ] and Va [ rpm ] and the rotation time is a time between Tb [ sec ] and Ta [ sec ].
After the frictional electrification operation, when the outdoor air is taken into the dust collecting device 1, the outdoor air is rectified by the first baffle member 18 and the second baffle member 19 and passes through the center 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 surfaces of the collecting plates 2 by the static electricity generated on the surfaces of the collecting plates 2. During the frictional electrification operation, 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 portion of the brush 3 as an aggregate 17. When the aggregate 17 has a size equal to or larger than a certain value, it falls down by gravity and is collected in the dust box 4 provided below the brush 3.
In order to facilitate the removal of the aggregates 17 adhering to the brush 3, the drive control unit 7 may perform the triboelectric operation by half-rotating the collection plate 2 in the direction opposite to the rotation direction 50 of the triboelectric operation (hereinafter, referred to as reverse half-rotation) after step S05 or step S08. The drive control unit 7 reversely and half-rotates the collection plate 2, thereby dropping the aggregates 17 attached to the brush 3 and collecting them into the dust box 4. Here, the description is given by making the collection plate 2 rotate in reverse and half, but the rotation amount is only an example, and a combined operation of rotation in the reverse direction and rotation in the forward direction may be performed.
Here, as shown in fig. 1, the dust collector 1 and the heat exchange ventilator 10 at the subsequent stage are connected by a communication line 25 or the like for communicating operation information, and operation information of the frictional electrification operation of the dust collector 1 is transmitted to a control unit (not shown) in the heat exchange ventilator 10. When the dust collection device 1 performs the rotational movement of step S05 of the frictional electrification operation, the operation of the heat exchange ventilator 10 is adjusted so that the flow rate of the air flowing through the dust collection device 1 is slowed or the operation of the heat exchange ventilator 10 is stopped. This prevents the dust separated from the collecting plate 2 from flowing downstream by being blown by the wind, and ensures the collection of the dust into the dust box 4.
As described above, according to the dust collector 1 of embodiment 1, the drive control unit 7 controls the relative movement between the nonwoven fabric 3b of the brush 3 and the collecting plate 2 based on the detected humidity of the air passing through the collecting plate 2 transmitted from the humidity sensor 11 when the frictional electrification operation of the collecting plate 2 is performed. Therefore, when it is determined that air having high humidity passes through the drive control unit 7, the rotation speed of the collecting plate 2 is increased by controlling the motor 6, and the rotation time is prolonged, so that the contact between the nonwoven fabric 3b of the brush 3 and the collecting plate 2 is increased, thereby increasing the amount of charge of the collecting plate 2. Further, as long as the amount of charge necessary for dust collection is secured, the power consumption can be suppressed by suppressing the rotation speed of the motor 6. Therefore, the dust collecting device 1 can efficiently collect dust while suppressing a decrease in the amount of charge due to the humidity of the air and reducing a decrease in the dust collecting ability.
In the dust collection device 1 according to embodiment 1, the humidity sensor 11 is provided at a position on the downstream side of the trap plate 2 with respect to the flow of air. Therefore, by allowing the air collected by the collecting plate 2 to pass through the humidity sensor 11, the adhesion of dust to the humidity sensor 11 can be reduced, and the humidity can be detected with high accuracy for a long time.
The dust collection device 1 according to embodiment 2 basically has the same configuration as the dust collection device 1 according to embodiment 1, but differs in that it includes an air filter. Hereinafter, differences between the dust collecting device 1 of embodiment 2 and the dust collecting device 1 of embodiment 1 will be mainly described. The dust collector 1 according to embodiment 2 has the same configuration as that of the dust collector 1 according to embodiment 1.
Fig. 5 is a perspective view showing the structure of the dust collecting device 1 according to embodiment 2. In fig. 5, the devices and the like denoted by the same reference numerals as those in fig. 2 realize the same functions as those described in embodiment 1. As shown in fig. 5, the dust collection device 1 according to embodiment 2 includes an air filter 42 for collecting dust at the discharge port 14b located on the downstream side of the housing 15. As the air filter 42, a HEPA filter formed by forming a PP meltblown charged nonwoven fabric into a pleated shape is used here. The HEPA filter has high fiber density and 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 according to embodiment 2, the air from which dust and the like in the air are removed by the collecting plate 2 can be further cleaned, and thus a high dust collecting performance can be obtained. Here, in the dust collection device 1 according to embodiment 1, a humidity sensor 11 for detecting the humidity of air is provided on the downstream side of the collecting plate 2 in the dust collection device 1. The dust collection device 1 according to embodiment 2 has the humidity sensor 11 disposed downstream of the air filter 42.
As described above, according to the dust collection device 1 of embodiment 2, the same effect as that of the dust collection device 1 of embodiment 1 can be obtained, and by providing the humidity sensor 11 on the downstream side of the air filter 42, highly cleaned air can be caused to pass through the humidity sensor 11. Therefore, adhesion of dust to the humidity sensor 11 can be reduced, and humidity can be detected for a long time with high accuracy. Thus, the frictional electrification operation can be appropriately performed, and the dust collecting device 1 with less decrease in dust collecting ability due to decrease in the amount of electrification can be realized.
Here, the humidity sensor 11 may be provided in the heat exchange ventilator 10 located at the rear stage of the dust collection container 1. As shown in fig. 5, the dust collection device 1 may have a communication device 11A or the like instead of the humidity sensor 11. The communication device 11A transmits a signal including data of humidity around the installation position of the dust collection instrument 1, which is transmitted from the external device, to the drive control unit 7. The communication device is not required to be installed in the air passage, and is installed outside the air passage.
The air conditioner according to embodiment 3 basically has the same configuration as the air conditioner according to embodiment 1, but differs in that a humidity reducing device such as a heat exchange ventilator 10 or a dehumidifier is disposed in a front stage of the dust collector 1. Here, the heat exchange ventilator 10 is disposed as a humidity reducing device and will be described.
Fig. 6 is a schematic view showing an air conditioner with a dust collecting device according to embodiment 3 mounted thereon. In the air conditioner of fig. 6, when there is high humidity, the heat exchange ventilator 10 or the dehumidifier is operated to perform a humidity reduction process for reducing the humidity of the air flowing in. Thus, air having a lower humidity than the outside air flows into the collecting plate 2 in the dust collecting device 1 located at the rear stage. Therefore, the dust collecting device 1 with less reduction in dust collecting ability due to reduction in the amount of charge of the collecting plate 2 can be realized, and reduction in dust collecting ability in the entire air conditioner can be suppressed.
Fig. 7 is a perspective view of the dust collecting device according to embodiment 4. In fig. 7, the devices and the like denoted by the same reference numerals as those in fig. 2 realize the same functions as those described in embodiment 1. The dust collection device 1 according to embodiment 4 basically has the same configuration as the dust collection device 1 according to embodiment 1 or embodiment 2, but differs in that a temperature sensor 12 serving as a temperature detection means is further disposed in the dust collection device 1. The temperature sensor 12 detects the temperature of the air after passing through the trap plate 2.
Fig. 8 is a flowchart illustrating the operation of the dust collection device 1 according to embodiment 4. Next, the operation of the dust collector 1 according to embodiment 4 will be described with reference to fig. 8.
When the operation of the dust collecting device 1 is started, the frictional electrification operation for electrostatically charging the surface of the collecting plate 2 is performed (step S21). In this frictional electrification operation, the collection plate 2 is rotated to rub the surface of the collection plate 2 against the brush 3, thereby frictionally electrifying the collection plate 2. Therefore, a command is sent from the drive control unit 7 of the dust collection 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 the temperature of the air flowing in the air passage, respectively, and transmit a signal including data of the detected humidity and a signal including data of the detected temperature to the drive controller 7. The drive control unit 7 receives a signal including data of detected humidity and data of detected temperature 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 a preset humidity set value, and determines whether or not the detected humidity is lower than the humidity set value (step S22). The drive control unit 7 compares the detected temperature data included in the received signal with a preset temperature set value, and determines whether or not the detected temperature is lower than the temperature set value (steps S23 and S24).
When the drive control section 7 determines in step S22 that the detected humidity is "low" and determines in step S23 that the detected temperature is "low", it 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 rotate the motor 6 at a constant rotation speed Vc [ rpm ] (step S26). When determining that the fixed time Tc [ sec ] has elapsed (step S27), the drive control unit 7 transmits a rotation stop command to stop the motor 6 (step S37).
When the drive control unit 7 determines in step S22 that the detected humidity is "low" and determines in step S23 that the detected temperature is "high", the operation proceeds to the low humidity high temperature mode (step S28). In the low humidity/high temperature mode, the drive control unit 7 transmits a rotation command to rotate the motor 6 at a constant rotation speed Vd [ rpm ] (step S29). When determining that the fixed time Td [ sec ] has elapsed (step S30), the drive control unit 7 transmits a rotation stop command to stop the motor 6 (step S37).
When the drive control unit 7 determines in step S22 that the detected humidity is "high" and determines in step S24 that the detected temperature is "low", the operation proceeds 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 rotate the motor 6 at a constant rotation speed Ve [ rpm ] (step S32). When determining that the fixed time Te [ sec ] has elapsed (step S33), the drive control unit 7 transmits a rotation stop command to stop the motor 6 (step S37).
Then, when the drive control section 7 determines in step S22 that the detected humidity is "high" and determines in step S24 that the detected temperature is "high", it shifts to the high humidity and high temperature mode (step S34). In the high humidity/high temperature mode, the drive control unit 7 transmits a rotation command to rotate the motor 6 at a constant rotation speed Vf [ rpm ] (step S35). When determining that the fixed time Tf [ sec ] has elapsed (step S36), the drive control unit 7 transmits a rotation stop command to stop the motor 6 (step S37).
After stopping the motor 6 in step S37, the drive control unit 7 further determines whether a fixed time Ts [ sec ] has elapsed (step S38). When determining that the fixed time Ts [ sec ] has elapsed, the drive control unit 7 receives a signal including the data of the detected humidity and the data of the detected temperature detected by the humidity sensor 11 and the temperature sensor 12, respectively, again (step S39). The drive control unit 7 compares the detected humidity data included in the received signal with a preset humidity set value. In addition, the data of the detected temperature is compared with a preset temperature set value (step S40). Here, the humidity set value in step S22 and the temperature set value in step S40 are the same, and the temperature set value in step S23 and the temperature set value in step S40 are the same. Then, the drive control unit 7 determines a waiting time Tw [ sec ] until the next frictional electrification operation is performed based on the comparison result (step S41). After Tw [ seconds ] has elapsed (step S42), the frictional electrification operation is started again, and the process returns to step S21.
When the humidity is high, the resistance of the surface of the resin plate is reduced, and charging is less likely to occur. Further, at a low temperature, the amount of moisture adsorbed by the collection plate 2 increases, and therefore the resistance of the surface of the resin plate tends to decrease. Therefore, in order to achieve a predetermined charge amount, it is preferable to perform the rubbing operation at a high humidity for a longer time than at a low humidity. Further, it is preferable that the friction operation at a low temperature is performed faster and for a longer period of time than at a high temperature.
Therefore, it is preferable that the rotation speed for the relative movement speed be Ve [ rpm ] > Vf [ rpm ] > Vc [ rpm ] > Vd [ rpm ], and the rotation time for the relative movement time be Te [ sec ] > Tf [ sec ] > Tc [ sec ] > Td [ sec ]. When the charge reduction rate of the resin surface is high, it is preferable to increase the cycle (rotation cycle) until the next frictional charging operation in order to maintain a predetermined charge amount. Therefore, it is preferable to vary the waiting time Tw [ sec ] according to the detected humidity and the detected temperature. Here, the settings of the rotation speed, the rotation time, and the rotation period are preferably all changed in accordance with the humidity, but only any one of the parameters may be changed.
As described above, according to the dust collector 1 of embodiment 4, the drive control unit 7 controls the relative movement between the nonwoven fabric 3b of the brush 3 and the collecting plate 2 based on the detected humidity and the detected temperature transmitted from the humidity sensor 11 and the temperature sensor 12. Therefore, when it is determined that the charge amount of the collecting plate 2 is likely to decrease, for example, in the air having high humidity and low temperature, the drive control unit 7 increases the rotation speed, and increases the contact between the nonwoven fabric 3b and the collecting plate 2 by increasing the rotation time, thereby increasing the charge amount of the collecting plate 2. Therefore, the dust collecting device 1 can efficiently collect dust while suppressing a decrease in the amount of charge caused by the humidity of the air and reducing a decrease in the dust collecting ability. Further, as long as the amount of charge required for dust collection is secured, power consumption can be suppressed by suppressing the rotation speed of the motor 6, and dust collection can be efficiently performed.
In the dust collection device 1 according to embodiment 1, the temperature sensor 12 is provided at a position downstream of the collecting plate 2 with respect to the flow of air. Therefore, by allowing the air collected by the collecting plate 2 to pass through the temperature sensor 12, the adhesion of the dust to the temperature sensor 12 can be reduced, and the humidity can be detected with high accuracy for a long time.
Fig. 9 is a perspective view of the dust collecting device according to embodiment 5. In fig. 9, the devices and the like denoted by the same reference numerals as those in fig. 2 realize the same functions as those described in embodiment 1. The dust collection device 1 according to embodiment 5 basically has the same configuration as the dust collection device 1 according to embodiment 1, embodiment 2, or embodiment 3. The dust collection device 1 according to embodiment 5 is different from the dust collection devices 1 according to embodiments 1 to 4 in that: in the dust collection device 1, a charge amount sensor 13 serving as a charge amount detection means is disposed instead of the humidity sensor 11 and the temperature sensor 12. In the dust collector of embodiment 5, the charge amount sensor 13 is a surface potentiometer for reading the potential of the surface to be measured, a charge meter (coulometer) for reading the charge amount, or a sensor functioning similarly to these.
In embodiments 1 to 4, the charge amount on the surface of the collecting plate 2 is predicted based on the humidity of the air flowing into the dust collecting device 1, and the frictional rotation control is performed to increase the charge amount on the surface of the collecting plate 2. The dust collector 1 of embodiment 5 has a charge amount sensor 13, and detects the charge amount of the collecting plate 2. The drive control unit 7 performs frictional rotation control based on the measured charge amount.
Fig. 10 is a flowchart illustrating the operation of the dust collection device 1 according to embodiment 5. Next, the operation of the dust collection device 1 according to embodiment 5 will be described with reference to fig. 10.
When the operation of the dust collecting device 1 is started, the frictional electrification operation for electrostatically charging the surface of the collecting plate 2 is performed (step S51). In this frictional electrification operation, the surface of the collection plate 2 is rubbed against the brush 3 by rotating the collection plate 2, thereby frictionally electrifying the collection plate 2. Therefore, a command is sent from the drive control unit 7 of the dust collection 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 collecting plate 2, and transmits a signal including data of the detected charge amount to the drive control unit 7.
The drive control unit 7 compares the detected charge amount data included in the received signal with a preset charge amount set value, and determines whether or not the detected charge amount is lower than the charge amount set value (step S52). When the drive control unit 7 determines that the detected charging amount is "high" after comparing the detected charging amount with the charging amount set value, it shifts to the high charging amount mode (step S53). In the high charge amount mode, the drive control unit 7 sends a rotation command to rotate the motor 6 at a constant rotation speed Vg [ rpm ] (step S54). When determining that the fixed time Tg [ sec ] has elapsed (step S55), the drive control unit 7 transmits a rotation stop command to stop the motor 6 (step S59).
On the other hand, when the drive control unit 7 determines in step S52 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 transmits a rotation command to rotate the motor 6 at a constant rotation speed Vh [ rpm ] (step S57). When it is determined that the fixed time Th [ sec ] has elapsed (step S58), a rotation stop command for stopping the motor 6 is transmitted (step S59).
After stopping the motor 6 in step S56, the drive control unit 7 further determines whether a fixed time Ts [ sec ] has elapsed (step S60). When determining that the fixed time Ts [ sec ] has elapsed, the drive control unit 7 receives a signal including the data of the detected charge amount detected by the charge amount sensor 13 again (step S61). The drive control unit 7 compares the data of the detected charge amount included in the received signal with a preset charge amount set value (step S62). Here, the explanation is made assuming that step S52 and step S62 are the same charge amount set value, but they may be different set values. Then, the drive control unit 7 determines a waiting time Tw [ sec ] until the next frictional 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 ] has elapsed (step S64), the frictional electrification operation is started again, and the process returns to step S51.
When the charge amount on the surface of the collecting plate 2 is low, it is preferable to perform the rubbing operation quickly and for a long time in order to achieve a predetermined charge amount. Therefore, it is preferable that the rotation speed for the relative movement speed is Vh [ rpm ] > Vg [ rpm ], and the rotation time for the relative movement time is Th [ sec ] > Tg [ sec ]. When the charge amount on the surface of the collecting plate 2 is lower than the predetermined charge amount, it is preferable to immediately perform the next frictional charging operation. Therefore, it is preferable to set the waiting time Tw [ sec ] to 0[ sec ] and start the next frictional electrification operation. Here, it is preferable that all of the settings of the rotation speed, the rotation time, and the rotation period are changed in accordance with the charge amount, but only one of the parameters may be changed.
In embodiments 1 to 5, the drive control unit 7 determines the rotation speed, rotation time, and rotation period of the collection plate 2 during the frictional electrification operation based on the determined mode, and performs drive control of the motor 6 that rotates the collection plate 2. However, the present invention is not limited thereto. One or both of the rotation speed, the rotation time, and the rotation period may be determined to control the driving of the motor 6.
Description of reference numerals
1 dust collector, 2 collecting plate, 3 brush, 3a supporting plate, 3b non-woven fabric, 3c mounting hole, 4 dust box, 4a front end, 5 dust, 6 motor, 7 drive control part, 8 first shaft, 9 second shaft, 10 heat exchange ventilator, 11 humidity sensor, 11A communicator, 12 temperature sensor, 13 charge sensor, 14a suction inlet, 14b discharge outlet, 15 frame, 15a upper surface, 15b lower surface, 16 wind path, 17 aggregate, 18 first baffle piece, 19 second baffle piece, 20 sunken ceiling, 21 outdoor air supply inlet, 22 outdoor air outlet, 23 indoor air supply inlet, 24 indoor air outlet, 25 communication line, 30 air supply wind path, 31, 41 pipeline, 40 air discharge wind path, 42 air filter, 50 rotation direction.
Claims (15)
1. A dust collection implement, wherein the dust collection implement comprises:
a plurality of collecting plates arranged at intervals in a direction intersecting with a direction of air passage in an air passage through which the air passes, and charged by friction;
a friction body that contacts the capture plate and rubs the capture plate; and
a drive control unit that controls relative movement of the capture plate and the friction body based on humidity of the air passing through the capture plate.
2. The dust collection appliance of claim 1,
the dust collector comprises a humidity detection device for detecting the humidity of the air passing through the collecting plate,
the drive control unit controls the relative movement between the capture plate and the friction member based on a signal including the humidity data transmitted from the humidity detection device.
3. The dust collection appliance of claim 2,
the humidity detection means is disposed on a downstream side of the trap plate with respect to the flow of the air.
4. The dust collection appliance of claim 2,
the humidity detection device is a communication device that is provided outside the wind path and receives a signal containing the humidity data transmitted from an external device.
5. The dust collecting appliance according to any one of claims 1 to 4,
the drive control unit performs relative movement control based on one or more of increasing the relative movement speed of the capture plate and the friction member, increasing the relative movement time, and shortening the relative movement cycle when it is determined that the value of the humidity of the air passing through the capture plate is higher than a preset humidity set value.
6. A dust collecting appliance according to any one of claims 2 to 5,
the dust collector comprises a temperature detection device for detecting the temperature of the air passing through the collecting plate,
the drive control unit further performs control of relative movement between the friction body and the capture plate based on a signal including data of temperature transmitted from the temperature detection device.
7. The dust collection appliance of claim 6,
the temperature detection means is disposed on a downstream side of the trap plate with respect to the flow of the air.
8. The dust collecting apparatus of claim 6 or claim 7,
the drive control unit performs relative movement control based on one or more of increasing the relative movement speed of the capture plate and the friction member, increasing the relative movement time, and shortening the relative movement cycle when it is determined that the value of the temperature of the air passing through the capture plate is lower than a preset temperature set value.
9. A dust collection implement, wherein the dust collection implement comprises:
a plurality of collecting plates arranged at intervals in a direction intersecting with a direction of air passage in an air passage through which the air passes, and charged by friction;
a friction body that moves relative to the capture plate and that rubs a surface of the capture plate; and
a drive control unit that controls relative movement of the capture plate and the friction body based on an amount of charge of a surface of the capture plate.
10. The dust collection appliance of claim 9,
the dust collector comprises a charge amount detector for detecting the charge amount on the surface of the collecting plate,
the drive control unit controls the relative movement of the friction body and the capture plate based on a signal including the data of the charge amount transmitted from the charge amount detection device.
11. The dust collection appliance of claim 10,
the charge amount detection device is disposed on a downstream side of the trap plate with respect to the flow of the air.
12. The dust collecting appliance according to any one of claims 9 to 11,
the drive control unit performs relative movement control based on one or more of increasing a relative movement speed of the capture plate and the friction member, increasing a relative movement time, and shortening a relative movement cycle when it is determined that the charge amount on the surface of the capture plate is less than a preset charge amount set value.
13. The dust collecting appliance according to any one of claims 1 to 12,
the drive control unit drives the capture plate to rotate relative to the fixed friction member, and moves the capture plate and the friction member relative to each other.
14. An air conditioner having a dust collecting device mounted thereon,
the dust collector according to any one of claims 1 to 13.
15. The air conditioner with a dust collecting device according to claim 14,
the air conditioner is provided with a humidity reducing device which is arranged on the upstream side of the dust collecting device relative to the flow of air and reduces the humidity of the air passing through the dust collecting device.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/022860 WO2020250263A1 (en) | 2019-06-10 | 2019-06-10 | Dust collection device and air conditioning device provided with dust collection device |
Publications (2)
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| CN113924166A true CN113924166A (en) | 2022-01-11 |
| CN113924166B CN113924166B (en) | 2024-04-02 |
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| CN201980097091.6A Active CN113924166B (en) | 2019-06-10 | 2019-06-10 | Dust collector and air conditioner with same |
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| Country | Link |
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| JP (1) | JP6661845B1 (en) |
| CN (1) | CN113924166B (en) |
| WO (1) | WO2020250263A1 (en) |
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| JP7400387B2 (en) | 2019-06-10 | 2023-12-20 | 三菱電機株式会社 | Dust collector and air conditioner |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6661845B1 (en) | 2020-03-11 |
| JPWO2020250263A1 (en) | 2021-09-13 |
| CN113924166B (en) | 2024-04-02 |
| WO2020250263A1 (en) | 2020-12-17 |
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