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WO2017168570A1 - Climatiseur - Google Patents

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Publication number
WO2017168570A1
WO2017168570A1 PCT/JP2016/060152 JP2016060152W WO2017168570A1 WO 2017168570 A1 WO2017168570 A1 WO 2017168570A1 JP 2016060152 W JP2016060152 W JP 2016060152W WO 2017168570 A1 WO2017168570 A1 WO 2017168570A1
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WO
WIPO (PCT)
Prior art keywords
detection sensor
fibers
filter
air conditioner
fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2016/060152
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English (en)
Japanese (ja)
Inventor
功瑛 ▲高▼栖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2016/060152 priority Critical patent/WO2017168570A1/fr
Publication of WO2017168570A1 publication Critical patent/WO2017168570A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/032—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers
    • F24F1/0323—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/0328—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air
    • F24F1/035—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air characterised by the mounting or arrangement of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/03—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by mounting arrangements
    • F24F1/0317—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by mounting arrangements suspended from the ceiling

Definitions

  • the present invention relates to an air conditioner having a function of detecting air contamination.
  • Some indoor units for air conditioning are provided with a filter that collects dust in indoor air and a dust detection sensor that detects dust sucked from the room.
  • a filter for collecting dust a filter in which fibers are knitted in a mesh shape is often used, but a filter for collecting dust by charging may be used.
  • An example of a dust collection filter that charges and collects dust is disclosed in Patent Document 1.
  • An example of a dust detection sensor is disclosed in Patent Document 2.
  • the optical dust sensor disclosed in Patent Document 2 counts the number of dust passing through the detection region by irradiating the detection region with light and detecting reflected light from the dust passing through the detection region. If the number exceeds a certain amount, it is determined that contamination has occurred.
  • substances that cause dirt in the indoor air are not limited to dust but may be chemical substances.
  • sensors using MEMS Micro-Electro-Mechanical Systems
  • gases such as carbon monoxide and hydrogen.
  • a sensor using the MEMS technology is referred to as a “MEMS sensor”.
  • the MEMS sensor has a structure in which a metal oxide is formed on a silicon substrate.
  • the MEMS sensor detects a change in gas concentration as a change in voltage output on the surface of the metal oxide, and determines that contamination has occurred when a certain amount of change is detected.
  • Patent Document 3 An example of a MEMS sensor is disclosed in Patent Document 3.
  • the optical dust sensor disclosed in Patent Document 2 determines the degree of contamination of the filter from the amount of dust particles passing through the detection region, but it is important where the optical dust sensor is installed. For example, if there is a bias in the wind speed due to the suction of air that is sucked into the air conditioning indoor unit from the room, dust will accumulate quickly only on a part of the filter. Unless an optical dust sensor is installed at a position where dust is likely to accumulate, detection of the occurrence of dirt on the filter will be delayed. This problem also applies to the MEMS sensor disclosed in Patent Document 3. In the sensors disclosed in Patent Documents 2 and 3, there is a problem that it is difficult to determine the sensor installation position.
  • the optical dust sensor disclosed in Patent Document 2 has low detection sensitivity of dust with low reflected light intensity
  • the MEMS sensor disclosed in Patent Document 3 has a detection target determined by the metal type of metal oxide. Therefore, there is a problem that the detection sensitivity is bad for gases other than the detection target.
  • the present invention has been made to solve the above-described problems, and provides an air conditioner that can detect dirt generated in a dust collecting portion with high sensitivity even if the air velocity distribution of air suction is uneven. There is.
  • the air conditioner according to the present invention is arranged across a fan that sucks in indoor air, a dust collecting unit that collects dust in the air sucked by the fan, and an air inlet or outlet in the dust collecting unit, A dirt detection sensor provided with a fiber containing carbon nanotubes, and whether or not dirt is generated in the dust collecting unit based on a change in current flowing through the fiber when a predetermined voltage is applied to the dirt detection sensor. And a control unit.
  • the sensor including carbon nanotubes having high dust detection sensitivity is provided so as to straddle the air inlet or outlet of the dust collecting portion, the dust can be collected even if the air velocity distribution of the air suction is uneven. It is possible to detect dirt generated in the collecting unit with high sensitivity.
  • FIG. 4 is a side perspective view illustrating an example of the internal structure of the air conditioning indoor unit illustrated in FIG. 3.
  • FIG. 2 is a side perspective view illustrating an example of an internal structure when the air conditioning indoor unit illustrated in FIG. 1 includes two heat exchangers.
  • FIG. 1 It is a functional block diagram which shows one structural example of the air conditioner of Embodiment 1 of this invention. It is a figure which shows the example of 1 structure of the dirt detection sensor provided in the air conditioner of Embodiment 1 of this invention. It is a schematic diagram for demonstrating the method to detect the dirt of a filter using the dirt detection sensor shown in FIG. It is a top view which shows the structure of the modification 1 of the dirt detection sensor shown in FIG. It is a top view which shows the structure of the modification 2 of the dirt detection sensor shown in FIG. It is a top view which shows the structure of the modification 3 of the dirt detection sensor shown in FIG. It is a top view which shows the structure of the modification 4 of the dirt detection sensor shown in FIG. It is a functional block diagram which shows one structural example of the air conditioner of Embodiment 2 of this invention. It is a schematic diagram for demonstrating the method to detect the dirt of a filter using the dirt detection sensor shown in FIG.
  • Embodiment 1 FIG.
  • an air conditioner indoor unit called a packaged air conditioner among various indoor units.
  • a packaged air conditioner is an air conditioner that allows a user to select the number and type of indoor units according to the use and volume of a room to be air-conditioned in an office or a store. Examples of the indoor unit include a floor type, a ceiling cassette type, and a ceiling type.
  • the indoor unit include a floor type, a ceiling cassette type, and a ceiling type.
  • the type of indoor unit is a floor-standing type will be described.
  • a case where there is one indoor unit will be described, but a plurality of indoor units may be provided.
  • FIG. 1 is a front view showing an example of the appearance of the air conditioning indoor unit according to Embodiment 1 of the present invention.
  • a part of FIG. 1 is a perspective view, and a perspective configuration is indicated by a broken line.
  • the external shape of the indoor unit shown in FIG. 1 is a box-shaped rectangular parallelepiped.
  • FIG. 1 shows a state where the indoor unit is installed on the floor. In the indoor unit shown in FIG. 1, a direction perpendicular to the floor is defined as “vertical direction”, and a direction parallel to the floor is defined as “lateral direction”. As shown in FIG.
  • the front side of the indoor unit is covered with a decorative panel 1 on the upper side and covered with a front side suction inlet panel 3 on the lower side.
  • An opening 1a is provided in a part of the decorative panel 1, and the operation panel 2 is arranged in the opening 1a.
  • the operation panel 2 includes a display unit (not shown) that displays an operation state including settings of the air conditioner and an environmental state including an indoor temperature, and an operation unit (not illustrated) for the user to instruct the setting and operation of the air conditioner. As shown).
  • a touch panel may be provided on the display unit of the operation panel 2, and a part of the function of the operation unit may be executed by the touch panel.
  • the front side suction port panel 3 is provided with a plurality of intake holes 4.
  • a plurality of intake holes 4 In the example shown in FIG. 1, four rows of 13 intake holes 4 arranged at equal intervals in the vertical direction are provided at equal intervals in the horizontal direction.
  • An opening including the plurality of intake holes 4 (13 ⁇ 4 intake holes 4) is referred to as a front side intake port 20.
  • the types of intake holes 4 are grill holes, punch holes, slits, and the like.
  • the intake hole 4 shown in FIG. 1 is a kind of slit.
  • the material of the front side suction inlet panel 3 is, for example, iron, stainless steel, aluminum, and plastic.
  • a fan case flange 5 having a blow-out port for sending the air after heat conversion into the room.
  • the indoor unit is not the front side suction specification that sucks air from the front side but the rear side suction specification that sucks air from the back side will be described later.
  • FIG. 2 is a rear view showing an example of the appearance of the air conditioning indoor unit shown in FIG. 1.
  • a part of FIG. 2 is a perspective view, and the configuration seen through is indicated by a broken line.
  • the back surface of the indoor unit is covered with a back panel 6.
  • the back side panel 6 is provided with a back side suction port 7 on the side close to the floor surface.
  • the back side suction port 7 is provided with a lattice (not shown) in order to prevent a thing larger than dust, such as a plastic bag, from being sucked.
  • the material of the lattice is not limited to a metal such as iron and aluminum, but may be a non-metal such as plastic.
  • the width which is the length in the lateral direction of the back side suction port 7 is defined as W1.
  • FIG. 3 is a front view showing an example of an internal structure when the indoor unit for air conditioning shown in FIG. 1 has one heat exchanger.
  • FIG. 4 is a side perspective view showing an example of the internal structure of the air conditioning indoor unit shown in FIG. 3. 3 and 4 show a configuration when the indoor unit has one heat exchanger. 3 shows a state in which the decorative panel 1 and the front-side suction inlet panel 3 shown in FIG. 1 and the filter 22 shown in FIG. 4 are removed from the indoor unit shown in FIG.
  • a drain pan 15 for receiving water condensed in the heat exchanger 10 is provided below the heat exchanger 10.
  • a fan 8 that sucks indoor air into the indoor unit and a motor 9 that rotationally drives the fan 8 are provided above the heat exchanger 10.
  • the heat exchanger 10 is configured by integrating a pipe (not shown) through which a refrigerant circulates between the heat exchanger 10 and an outdoor unit (not shown) and a plurality of fins (not shown). 3 and 4, the external appearance of the entire heat exchanger 10 is shown in a simplified form as a plate-shaped rectangular parallelepiped. As shown in FIG. 4, the heat exchanger 10 is inclined toward the floor surface with respect to the longitudinal direction. When attention is paid to the upper and lower sides of the heat exchanger 10 shown in FIG. 4, the upper side approaches the front panel of the indoor unit, and the lower side approaches the rear panel of the indoor unit. In the configuration example shown in FIG. 4, a filter 22 is attached to the heat exchanger 10. The filter 22 is an example of a dust collecting unit that serves to collect dust in the air.
  • the drain pan 15 is connected to a pipe (not shown) for discharging water accumulated in the drain pan 15.
  • a motor-side pulley 12 is attached to the tip of the rotating shaft of the motor 9.
  • a fan-side pulley 11 is attached to the tip of the rotating shaft of the fan 8. Belts are put on the motor-side pulley 12 and the fan-side pulley 11.
  • a plurality of fins are attached to the rotating shaft of the fan 8. When the rotation shaft of the motor 9 rotates, the rotational driving force is transmitted to the fan-side pulley 11 via the motor-side pulley 12 and the belt. When the fan-side pulley 11 rotates, the plurality of fins attached to the rotation shaft of the fan 8 rotate. Thereby, indoor air is suck
  • the vertical dimension of the front side suction port 20 is L1, and the vertical dimension of the back side suction port 7 is H1.
  • the longitudinal dimension L1 of the front side suction port 20 is set to 300 to 1500 [mm]
  • the rear side suction port. 7 has a width W1 of 500 to 2500 [mm]
  • a vertical dimension H1 of the back side suction port 7 is 50 to 500 [mm].
  • the back side suction port 7 is provided so that the lower end of the back side suction port 7 is located in the range of 5 to 200 mm from the upper edge of the drain pan 15 to the upper side.
  • the dimensions are set so as to ensure the air volume and determine the wind speed distribution.
  • the filter 22 is attached to the heat exchanger 10, but a filter may also be provided on the back side suction port 7.
  • FIG. 5 is a side perspective view showing an example of the internal structure when the indoor unit for air conditioning shown in FIG. 1 has two heat exchangers.
  • the indoor unit has two heat exchangers 16a and 16b.
  • the heat exchanger 16a and the heat exchanger 16b are arranged in a V shape, an L shape, or a ⁇ shape as viewed from the side of the indoor unit.
  • FIG. 5 is a side perspective view showing an example of the internal structure when the indoor unit for air conditioning shown in FIG. 1 has two heat exchangers.
  • the indoor unit has two heat exchangers 16a and 16b.
  • the heat exchanger 16a and the heat exchanger 16b are arranged in a V shape, an L shape, or a ⁇ shape as viewed from the side of the indoor unit.
  • FIG. 5 is a side perspective view showing an example of the internal structure when the indoor unit for air conditioning shown in FIG. 1 has two heat exchangers.
  • the indoor unit has two heat exchangers 16a and 16b.
  • the front side suction port 21 is provided in the front side panel 3a, and the back side suction port 17 is provided in the back side panel 6a.
  • the front-side suction port 21 has a plurality of intake holes 4 in the same manner as the front-side suction port 20 shown in FIG.
  • the back side suction port 17 is provided at a position higher than the back side suction port 7 shown in FIG. Further, assuming that the vertical dimension of the back side suction port 17 is H2, the relationship is H2> H1.
  • a filter 25 a is provided on the indoor unit side of the front side suction port 21, and a filter 25 b is provided on the indoor unit side of the back side suction port 17.
  • the filters 25a and 25b are an example of a dust collecting unit. In the configuration example shown in FIG. 5, the heat exchangers 16a and 16b are not provided with a filter.
  • the width of the back side suction port 17 is set to 500 to 2500 [mm] which is the same as the width W1 of the back side suction port 7.
  • the vertical dimension H2 of the back side suction port 17 is set to 30 to 1000 [mm].
  • the back side suction port 17 has a lower end of the back side suction port 17 30 on the upper side from the upper edge of the drain pan 15. It is provided so as to be in the range of up to 1000 [mm]. As described above, when both the front side and the rear side suction ports are used, the pressure loss of the suction air is reduced, the air volume is ensured, and the optimum air speed distribution is determined. The position is set.
  • the longitudinal dimension L2 of the front side suction port 21 is set to 300 to 1500 [mm].
  • the front air pressure is reduced by reducing the pressure loss of the intake air and determining the optimum wind speed distribution.
  • the vertical dimension of the side suction port 21 is set.
  • FIG. 6 is a plan view illustrating a configuration example of the filter illustrated in FIG. 4.
  • the filter 22 has a frame 22a and an opening 22b.
  • the opening 22b is provided in a mesh shape so that a plurality of fibers intersect. Dust sucked together with air from the room is caught by the fibers provided in a mesh shape in the opening 22b.
  • FIG. 6 shows the front side suction port 20 side of the filter 22, and the opening 22 b shown in FIG. 6 corresponds to the air suction port of the filter 22.
  • the back side (not shown) of the opening 22 b corresponds to the air outlet of the filter 22.
  • the opening 22b is shown in the drawing, and the frame 22a is not shown in the drawing.
  • the dimension of the filter 22 it is desirable that each length in the vertical direction, the horizontal direction, and the depth is 50 mm or more. Also for the other filters including the filters 25a and 25b, it is desirable that each dimension in the vertical direction, the horizontal direction, and the depth is 50 mm or more.
  • FIG. 7 is a functional block diagram showing a configuration example of the air conditioner according to Embodiment 1 of the present invention.
  • the air conditioner of Embodiment 1 has an indoor unit 51 and an outdoor unit 52.
  • the indoor unit 51 includes a motor 9, a dirt detection sensor 35, an operation unit 27, and a control unit 40.
  • the control unit 40 is connected to each of the motor 9, the dirt detection sensor 35, the operation unit 27, and the outdoor unit 52.
  • the heat exchanger 10 is connected to the outdoor unit 52 by piping (not shown).
  • the operation unit 27 is included in the operation panel 2. It is assumed that the dirt detection sensor 35 is attached to the suction port of the filter 22 shown in FIG.
  • the control unit 40 includes a microcomputer (not shown) that executes processing according to a predetermined procedure, and a non-volatile memory (not shown) that stores a predetermined voltage and threshold and a reference current value to be measured. Have.
  • the voltage, the reference current value, and the threshold value stored in the nonvolatile memory are values used in the stain detection determination process described later.
  • the control unit 40 controls the motor 9 and the outdoor unit 52 in accordance with instructions input via the operation unit 27.
  • the control unit 40 applies a predetermined voltage to the dirt detection sensor 35 at a constant cycle, measures the current flowing through the dirt detection sensor 35, and determines whether the filter 22 is dirty based on the change in the measured current. Determine whether.
  • the fixed cycle is, for example, 1 to 2 [times / day].
  • the voltage applied to the dirt detection sensor 35 is generated by a step-down circuit (not shown) after an AC voltage supplied from the outside is converted into a DC voltage by a voltage conversion circuit (not shown).
  • the control part 40 may be provided with the function as a remote controller which also performs the air-conditioning control of another indoor unit, when the indoor unit shown in FIG. 1 is provided with two or more.
  • FIG. 8 is a diagram illustrating a configuration example of a dirt detection sensor provided in the air conditioner according to Embodiment 1 of the present invention.
  • the dirt detection sensor 35 shown in FIG. 7 is attached to the opening on the suction port side of the filter 22 shown in FIG. 4
  • it may be attached to the opening on the outlet side.
  • the filter to which the dirt detection sensor 35 is attached is not limited to the filter 22.
  • the dirt detection sensor 35 may be attached to the filter 25a and the filter 25b.
  • the dirt detection sensor 35 has a configuration including fibers 30 including carbon nanotubes.
  • Electrodes 31 and 32 are provided at both ends of the fiber 30.
  • the material of the electrodes 31 and 32 is, for example, copper.
  • the fibers 30 are arranged in the filter 22 along straight lines connecting the centers of two sides facing each other in the lateral direction among the four sides of the rectangular opening.
  • the opening of the filter 22 has two sets of two sides facing each other, but the fiber 30 shown in FIG. 8 connects the center points of the two sides facing each other in the lateral direction.
  • the dirt detection sensor 35 shown in FIG. 8 is provided so that the fibers 30 straddle the opening of the filter 22 in the lateral direction. When the deviation of the wind speed distribution occurs in the lateral direction of the opening of the filter 22, the configuration of the dirt detection sensor 35 shown in FIG. 8 is effective.
  • the material of the fiber 30 is a fiber containing 50 to 100% of carbon nanotubes.
  • the fiber 30 is not a “100% carbon nanotube fiber”, for example, a carbon fiber added with a carbon nanotube can be considered.
  • carbon fibers containing carbon nanotubes are referred to as “nanotube-containing carbon fibers”.
  • the fiber 30 may be composed of a single fiber, or may be a structure in which a plurality of fibers are combined together like a rope to form a single bundle.
  • a plurality of generated carbon nanotubes are attracted to each other by van der Waals force in a manufacturing process, and tend to have a structure called a bundle.
  • This bundle may be the fiber 30.
  • the fiber 30 includes carbon nanotubes, the mechanical strength is high.
  • the mechanical strength increases, and it is possible to prevent a decrease in the sensitivity of the sensor due to deflection due to the air suction force. Deflection of the filter due to air blown from the room, dust, or the like has little influence on the dirt detection sensor 35.
  • the elongation rate of the fiber 30 due to deflection or the like is about 0.1 to 2%, but the influence on the sensitivity of the dirt detection is less than that.
  • the thickness of the fiber 30 can be in the range of 1 ⁇ m to 10 mm.
  • the case where the thickness is 1 ⁇ m is, for example, the case of one carbon nanotube.
  • the case where the thickness is 10 mm is, for example, the case of the bundle or the nanotube-containing carbon fiber.
  • a fiber having a thickness of 1 ⁇ m to 10 mm can be used as the fiber 30.
  • the fiber 30 has a thickness that can be easily seen by an air conditioner administrator and prevents an increase in air resistance. It is desirable that it is.
  • the reason why the thickness of the fiber 30 is easy for the manager to visually recognize is to allow the manager to visually recognize that the fiber 30 is cut when the fiber 30 is cut. .
  • Single-walled carbon nanotubes are called carbon graphene, in which a single atomic layer of carbon is formed into a cylindrical shape, but depending on how they are bonded, it becomes a property of a conductor or a semiconductor.
  • carbon nanotubes having a conductor property are referred to as metal nanotubes
  • carbon nanotubes having a semiconductor property are referred to as semiconductor nanotubes.
  • CVD Chemical Vapor Deposition
  • a centrifugation method using a surfactant density gradient centrifugation method
  • the conductivity of metal nanotubes separated from semiconductor nanotubes is 1000 times that of copper.
  • the conductivity of the fibers 30 is 1000 times that of copper. Even if the fibers 30 are not all composed of metal nanotubes, the ratio of the metal nanotubes in the fibers 30 may be increased so that the conductivity of the fibers 30 is smaller than the conductivity of copper. In this case, the fiber 30 has better sensitivity than copper for detecting substances that cause dirt in the air. Further, it is possible to adjust the detection sensitivity by adjusting the ratio of the semiconductor nanotubes contained in the fiber 30 according to the type of dust to be detected.
  • the detection target of the dirt detection sensor 35 is not limited to dust, but may be mold or dust generated in a factory.
  • tea powder may be a detection target.
  • wear powder such as metal may be a detection target.
  • the wear powder is, for example, metal powder.
  • carbon nanotube used for the fiber 30 is a single wall was demonstrated, a carbon nanotube may be a multilayer.
  • FIG. 9 is a schematic diagram for explaining a method of detecting filter dirt using the dirt detection sensor shown in FIG. It is assumed that the fiber 30 is configured such that the conductivity of the fiber 30 is higher than that of copper.
  • the control unit 40 applies a voltage between the two electrodes 31 and 32 of the dirt detection sensor 35 via the wirings 41 and 42 at a constant cycle, and measures the current flowing through the dirt detection sensor 35. Then, the control unit 40 calculates a change rate with respect to the reference current value for the measured current, and determines that the filter 22 is contaminated when the change rate is greater than a predetermined threshold value.
  • the voltage applied between the electrode 31 and the electrode 32 of the fiber 30 is V, and the resistance of the fiber 30 is Rf .
  • the resistance values of the wirings 41 and 42 and the electrodes 31 and 32 are R W1 , R W2 , R e1 , and R e2
  • the current value I 0 measured by the control unit 40 is expressed by the following equation (1).
  • I 0 V / (R f + R W1 + R W2 + R e1 + R e2 ) (1)
  • Current value I 0 is the reference current value.
  • the control unit 40 measures the reference current value each time the filter 22 is cleaned and replaced, and updates the stored reference current value.
  • the mechanical strength of the dirt detection sensor 35 is high, but the reference current value of the fiber 30 changes little by little as the filter 22 is used for a long time. Therefore, a reference current value that is a criterion for determining whether or not the filter 22 has deteriorated may be registered in advance in a nonvolatile memory (not shown) of the control unit 40.
  • This reference current value is referred to as a filter reference.
  • the control unit 40 displays a message for prompting replacement or cleaning of the filter 22 on the display unit (not shown) of the operation panel 2 when the measured reference current value is larger than the filter reference before performing the dirt determination. indicate. In this way, the administrator can determine the time for replacement and cleaning of the filter 22. Further, the administrator may adjust the detection sensitivity by adjusting the threshold value TH.
  • the case where the ratio of the semiconductor nanotube in the carbon nanotube contained in the fiber 30 is set high is considered.
  • An example in that case will be described.
  • the air conditioner of Embodiment 1 is installed in a metal processing factory, metal powder is a detection target.
  • the fiber 30 is configured so that the ratio of the semiconductor nanotube to the carbon nanotube contained in the fiber 30 is higher than that of the metal nanotube.
  • the control unit 40 can determine whether the filter 22 is contaminated based on a change in the current flowing through the fiber 30.
  • the control unit 40 may determine based on a change in the resistance value of the fiber 30.
  • values of resistance elements other than the fibers 30 are registered in advance in a nonvolatile memory (not shown) of the control unit 40. Even if the applied voltage value deviates from a predetermined value due to a malfunction of the voltage generation circuit, the deviated voltage value is reflected in the current value. You do n’t have to.
  • Equation (1) and Equation (2) it is understood that when the left side is a resistance value and the right side is transformed to (voltage / current), the deviation generated in the voltage and the deviation generated in the current value are offset.
  • the electrical conductivity of the fiber 30 is increased and the detection sensitivity is set high, it is desirable to make a determination based on a resistance value that can suppress the influence of voltage fluctuation.
  • FIG. 10A is a plan view showing a configuration of Modification 1 of the dirt detection sensor shown in FIG.
  • the dirt detection sensor 35 includes a fiber 30a and electrodes 31a and 32a.
  • the fibers 30 a are arranged along straight lines connecting the centers of two sides facing each other in the vertical direction among the four sides of the rectangular opening.
  • the opening of the filter 22 has two sets of two sides facing each other, but the fiber 30a shown in FIG. 10A connects the center points of the two sides facing each other in the vertical direction. Since the materials of the fibers 30a and the electrodes 31a and 32a are the same as those of the fibers 30 and the electrodes 31 and 32 described with reference to FIG.
  • the dirt detection sensor 35 shown in FIG. 10A is provided so that the fibers 30a straddle the opening of the filter 22 in the vertical direction. When the deviation of the wind speed distribution occurs in the vertical direction of the opening of the filter 22, the configuration of the dirt detection sensor 35 shown in FIG. 10A is effective.
  • FIG. 10B is a plan view showing a configuration of Modification 2 of the dirt detection sensor shown in FIG.
  • the dirt detection sensor 35 includes a fiber 30b and electrodes 31b and 32b.
  • the fibers 30 b are arranged along a straight line connecting two opposing vertices among the four vertices of the square opening.
  • the electrode 31b is arranged at the lower left apex and the electrode 32b is arranged at the upper right apex of the filter 22 shown in FIG. 10B, but the electrode 31b is arranged at the apex 37 and at the apex 38.
  • the fiber 30b may be arranged so that the electrode 32b is arranged. Since the materials of the fiber 30b and the electrodes 31b and 32b are the same as those of the fiber 30 and the electrodes 31 and 32 described with reference to FIG. 8, detailed descriptions thereof are omitted.
  • the dirt detection sensor 35 shown in FIG. 10B is provided so that the fibers 30b straddle the opening of the filter 22 in an oblique direction. The configuration of the dirt detection sensor 35 shown in FIG. 10B is effective regardless of which direction of the wind speed distribution occurs in the vertical direction or the horizontal direction of the opening of the filter 22.
  • the fiber passes along the center of gravity of the shape of the opening of the filter 22 and is provided along a straight line connecting two points on the outer periphery of the opening. It has been.
  • FIG. 10C is a plan view illustrating a configuration of Modification 3 of the dirt detection sensor illustrated in FIG. 8.
  • the dirt detection sensor 35 has two fibers 30c and 30d. Electrodes 31c and 32c and electrodes 31d and 32d are provided at both ends of the fibers 30c and 30d, respectively.
  • the fibers 30c and 30d cross each other at the center of gravity of the shape of the opening of the filter 22 while maintaining insulation from each other.
  • the control unit 40 performs the stain determination for each of the fibers 30c and 30d. Since the materials of the fibers 30c, 30d and the electrodes 31c, 32c, 31d, 32d are the same as those of the fibers 30 and the electrodes 31, 32 described with reference to FIG.
  • the dirt detection sensor 35 shown in FIG. 10C is provided so that the fibers 30c and 30d straddle the opening of the filter 22 in the vertical direction and the horizontal direction. Even if the deviation of the wind speed distribution occurs in any one of the vertical direction and the horizontal direction of the opening of the filter 22, the configuration of the dirt detection sensor 35 shown in FIG. 10B is effective.
  • FIG. 10D is a plan view illustrating a configuration of a fourth modification of the dirt detection sensor illustrated in FIG. 8.
  • the dirt detection sensor 35 has a configuration in which a plurality of fibers 30e are arranged in a mesh pattern.
  • the whole of the plurality of fibers 30e corresponds to the size of the opening of the filter 22, and the shape thereof is a quadrangle.
  • the quadrangle has two sets of two sides facing each other, and the plurality of fibers 30e are arranged along a straight line connecting two sides of each of the two sets.
  • the left-right direction in FIG. 10D is referred to as a horizontal direction
  • the up-down direction is referred to as a vertical direction.
  • Each of the plurality of fibers 30e arranged in the lateral direction has one end connected to the electrode 31e and the other end connected to the electrode 32e.
  • the plurality of fibers 30e arranged in the transverse direction intersects the plurality of fibers 30e arranged in the vertical direction at right angles, but maintains insulation from the fibers 30e arranged in different directions.
  • the control unit 40 performs contamination determination by applying a voltage between the electrode 31e and the electrode 32e. Since the materials of the fibers 30e and the electrodes 31e and 32e are the same as those of the fibers 30 and the electrodes 31 and 32 described with reference to FIG. 8, detailed descriptions thereof are omitted.
  • the dirt detection sensor 35 shown in FIG. 10D is provided so that the plurality of fibers 30e straddle the opening of the filter in the lateral direction.
  • the configuration of the dirt detection sensor 35 shown in FIG. 10D is effective.
  • the plurality of fibers 30e arranged in each of the vertical direction and the horizontal direction contain carbon nanotubes, the strength against the deflection generated in the filter due to the wind speed increases.
  • the control unit 40 performs filter contamination determination based on the current flowing through the plurality of fibers 30e arranged in the horizontal direction, but the determination is performed using the plurality of fibers 30e arranged in the vertical direction. May be.
  • the electrodes 31e and 32e provided on the two lateral sides of the plurality of fibers 30e having a square overall shape may be provided on the two vertical sides of the square.
  • the fibers 30e of the plurality of fibers 30e in the vertical direction and the plurality of fibers 30e in the horizontal direction may be provided so as to be insulated from the other fibers 30e.
  • the control unit 40 it becomes possible for the control unit 40 to apply a voltage to each fiber 30e and measure the current to determine the presence or absence of contamination.
  • the dirt detection sensor 35 shown in FIG. 10D may be used as a filter. When the dirt detection sensor 35 shown in FIG. 10D is used as a filter, the fiber 30e has high mechanical strength, so that the life of the filter can be extended.
  • the dirt detection sensor 35 is disposed so as to straddle the vertical direction, the horizontal direction, or the oblique direction at the suction port or the outlet of the filter. Accordingly, the control unit 40 can detect dirt due to dust when dust such as dust accumulates on a part of the dirt detection sensor 35 even when the wind speed distribution is uneven.
  • the air conditioner of the first embodiment is disposed across the fan 8 that sucks in indoor air, the filter that collects dust in the air sucked by the fan 8, and the air inlet or outlet of the filter. It is determined whether or not the filter is contaminated based on a change in the current flowing through the fiber when a predetermined voltage is applied to the dirt detection sensor 35 and the dirt detection sensor 35 having a fiber containing carbon nanotubes. And a control unit 40.
  • the dirt detection sensor 35 including carbon nanotubes having high conductivity and high dust detection sensitivity is arranged so as to straddle the suction port or the outlet of the filter, even if the wind speed distribution of the air suction is uneven, When dust accumulates on a part of the dirt detection sensor 35, dirt generated on the filter can be detected with high sensitivity.
  • the dirt detection sensor 35 including carbon nanotubes has high mechanical strength and can be reused after being cleaned. Thereby, the operating cost of an air conditioner can be reduced and the influence on an environment can be reduced.
  • the reference value for determining the presence or absence of the deterioration of the filter is provided in advance, regardless of the degree of dust accumulation and the dust accumulation range, It is possible to determine the time for replacement and cleaning.
  • the fiber having high conductivity is used for the dirt detection sensor 35, the current flowing through the dirt detection sensor 35 can be small. Therefore, it is not necessary to provide a large-scale voltage generation circuit and current measurement circuit, and the indoor unit for air conditioning can be reduced in size and cost.
  • the control unit 40 applies a predetermined voltage to the dirt detection sensor 35 at a constant period to measure the current flowing through the fiber, and the reference current value measured in advance for the measured current. If the rate of change is greater than a predetermined threshold value, it may be determined that the filter is dirty. In this case, by using carbon nanotubes having high conductivity for the dirt detection sensor 35, the change in resistance value when dust adheres to the carbon nanotubes is reflected in the current value flowing through the fiber. The presence or absence of contamination can be determined with higher accuracy.
  • the detection unit 45 is further connected to each of the dirt detection sensor 35 and the control unit 40, and the detection unit 45 applies a predetermined voltage to the dirt detection sensor 35 at a constant cycle. Then, the current flowing through the fiber is measured, and the value of the measured current is notified to the control unit 40. The control unit 40 determines the rate of change of the current value notified from the detection unit 45 with respect to the reference current value measured in advance. If the calculated rate of change is greater than a predetermined threshold, it may be determined that the filter is dirty. In this case, since the detection unit 45 that detects the current flowing in the fiber is provided separately from the control unit 40, the detection unit 45 can be provided near the filter.
  • the lengths of the wirings 41 and 42 connecting the detection unit 45 and the control unit 40 can be shortened, and the control unit 40 is caused by the change in the current value caused by the change in the resistance value of the wirings 41 and 42. It is possible to suppress erroneous determination of the occurrence of dirt.
  • the fibers of the dirt detection sensor 35 are arranged along a straight line passing through the center of gravity of the shape of the opening of the suction port or outlet of the filter and connecting two points on the outer periphery of the opening. It may be.
  • the control unit 40 is wider even if the wind speed distribution is uneven. It is possible to detect the contamination of the filter due to the bias in the range.
  • the shape of the opening of the suction port or the outlet of the filter is a quadrangle
  • the opening has two sets of two sides facing each other
  • the fibers of the dirt detection sensor 35 are Of the two sets, they may be arranged along a straight line connecting the center points of two sides of one set.
  • the fibers of the dirt detection sensor 35 are arranged so as to straddle the opening of the filter in the vertical direction or the horizontal direction, even when the deviation of the wind speed distribution occurs in the vertical direction or the horizontal direction of the opening of the filter.
  • the control unit 40 can detect the occurrence of filter contamination.
  • the dirt detection sensor 35 may have two fibers, and the two fibers may cross each other at the center of gravity of the opening while maintaining insulation from each other.
  • the two fibers of the dirt detection sensor 35 are arranged so as to straddle the opening of the filter in the vertical direction and the horizontal direction, the deviation of the wind speed distribution is out of the vertical direction and the horizontal direction of the opening of the filter. Even if it occurs in either direction, the control unit 40 can detect the occurrence of contamination of the filter.
  • the shape of the opening of the suction port or the outlet of the filter is a quadrangle
  • the opening has two sets of two apexes facing each other
  • the fibers of the dirt detection sensor 35 are Of the two sets, they may be arranged along a straight line connecting two vertices of one set.
  • the control unit 40 can detect the occurrence of contamination of the filter.
  • the dirt detection sensor 35 has a plurality of fibers, the shape of the opening of the suction port or the outlet of the filter is a quadrangle, and two sets of two sides facing each other are set.
  • the plurality of fibers may be arranged along a straight line connecting two sides of each of the two sets.
  • the air conditioner of the first embodiment includes a fan 8 that sucks indoor air, a filter that collects dust in the air, a plurality of fibers including carbon nanotubes arranged in a mesh, and a plurality of A control unit that determines whether or not the filter is contaminated based on a change in current flowing through the fiber when a predetermined voltage is applied to both ends of at least one of the fibers It may be.
  • the filter since the filter is composed of fibers containing carbon nanotubes with high dust detection sensitivity, even if the air velocity distribution of air suction is uneven, it occurs in the filter when dust accumulates on a part of the fibers. Dirt can be detected.
  • the carbon nanotube has high mechanical strength, the life of the filter is prolonged.
  • FIG. 11 is a functional block diagram showing a configuration example of the air conditioner according to Embodiment 2 of the present invention.
  • the indoor unit 51 a includes a detection unit 45 connected to each of the dirt detection sensor 35 and the control unit 40 in addition to the configuration shown in FIG. 7.
  • the detection unit 45 applies a predetermined voltage between the electrodes 31 and 32 of the dirt detection sensor 35 at a constant period, and measures the current flowing through the fiber 30.
  • the voltage applied to the fiber 30 may be supplied via a wiring from a step-down circuit (not shown) provided in the indoor unit body, and a voltage generation circuit (not shown) is provided in the detection unit 45 in advance. It may be supplied from the inside.
  • FIG. 12 is a schematic diagram for explaining a method of detecting filter dirt using the dirt detection sensor shown in FIG. 11.
  • the detection unit 45 applies a predetermined voltage between the electrodes 31 and 32 of the fiber 30 at a constant period, measures the current flowing through the fiber 30, and notifies the control unit 40 of the measured current value.
  • the control unit 40 calculates the rate of change of the notified current value with respect to the reference current value. Then, when the calculated change rate is larger than the threshold value, the control unit 40 determines that the filter 22 is contaminated.
  • the dirt detection sensor 35 has been described with the configuration shown in FIG. 8, but any one of the dirt detection sensors of the first to fourth modifications described with reference to FIGS. 10A to 10D is implemented in this embodiment. You may apply to the form 2 of.
  • the detection unit 45 that measures the current flowing through the fiber 30 is provided separately from the control unit 40, and thus the detection unit 45 is connected to the filter 22. It becomes possible to provide near. As a result, the length of the wirings 41 and 42 can be shortened. Therefore, it can suppress that the control part 40 misjudges generation
  • FIG. 1 the control part 40 misjudges generation
  • the dust collecting unit that plays the role of collecting dust is described as a filter.
  • the dust collecting unit is a dust collecting filter as disclosed in Patent Document 1. It may be.
  • the air conditioning indoor unit is a packaged air conditioner indoor unit.
  • the air conditioning indoor unit of the present invention is not limited to a packaged air conditioner.
  • the air conditioner to which the present invention is applied may be an air cleaner.
  • the heat exchanger 10 and the outdoor unit 52 may not be provided.
  • 1 makeup panel 1a opening, 2 operation panel, 3 front side suction port panel, 3a front side panel, 4 intake hole, 5 fan case flange, 6 back side panel, 6a back side panel, 7 back side suction port, 8 Fan, 9 motor, 10, 16a, 16b heat exchanger, 11 fan side pulley, 12 motor side pulley, 15 drain pan, 17 back side suction port, 20, 21 front side suction port, 22, 25a, 25b filter, 22a frame , 22b opening, 27 operation part, 30, 30a-30e fiber, 31, 31a-31e electrode, 32, 32a-32e electrode, 35 dirt detection sensor, 37, 38 apex, 40 control part, 41, 42 wiring, 45 Detection unit, 51, 51a indoor unit, 52 outdoor unit.

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  • Life Sciences & Earth Sciences (AREA)
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  • Air Conditioning Control Device (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un climatiseur qui permet de détecter de façon sensible une contamination dans une unité de collecte de poussière même si la distribution de vitesse du vent de l'air aspiré est irrégulière. La solution selon l'invention porte sur un climatiseur comprenant : un ventilateur qui aspire l'air intérieur ; une unité de collecte de poussière qui collecte la poussière dans l'air aspiré par le ventilateur ; un capteur de détection de contamination qui est placé à travers l'orifice d'aspiration d'air ou l'orifice de soufflage de l'unité de collecte de poussière et qui est équipé de fibres contenant un nanotube de carbone ; et une unité de commande qui détermine si une contamination s'est ou non produite dans l'unité de collecte de poussière sur la base d'un changement du courant traversant les fibres lorsqu'une tension prédéterminée est appliquée au capteur de détection de contamination.
PCT/JP2016/060152 2016-03-29 2016-03-29 Climatiseur Ceased WO2017168570A1 (fr)

Priority Applications (1)

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PCT/JP2016/060152 WO2017168570A1 (fr) 2016-03-29 2016-03-29 Climatiseur

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0414115U (fr) * 1990-05-18 1992-02-05
US20050284168A1 (en) * 2004-06-29 2005-12-29 Lg Electronics Inc. Indoor device of separable air conditioner
JP2011021931A (ja) * 2009-07-14 2011-02-03 Sharp Corp 微生物センサユニットおよび空気調和機
WO2013105449A1 (fr) * 2012-01-13 2013-07-18 国立大学法人東京大学 Capteur de gaz
JP2015188832A (ja) * 2014-03-28 2015-11-02 株式会社富士通ゼネラル 電気集塵装置およびフィルタ並びに空気調和機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0414115U (fr) * 1990-05-18 1992-02-05
US20050284168A1 (en) * 2004-06-29 2005-12-29 Lg Electronics Inc. Indoor device of separable air conditioner
JP2011021931A (ja) * 2009-07-14 2011-02-03 Sharp Corp 微生物センサユニットおよび空気調和機
WO2013105449A1 (fr) * 2012-01-13 2013-07-18 国立大学法人東京大学 Capteur de gaz
JP2015188832A (ja) * 2014-03-28 2015-11-02 株式会社富士通ゼネラル 電気集塵装置およびフィルタ並びに空気調和機

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