WO2021045026A1 - 給気装置 - Google Patents

給気装置 Download PDF

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Publication number
WO2021045026A1
WO2021045026A1 PCT/JP2020/032984 JP2020032984W WO2021045026A1 WO 2021045026 A1 WO2021045026 A1 WO 2021045026A1 JP 2020032984 W JP2020032984 W JP 2020032984W WO 2021045026 A1 WO2021045026 A1 WO 2021045026A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
air supply
compressor
air volume
control unit
Prior art date
Application number
PCT/JP2020/032984
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
明徳 奥村
Original Assignee
パナソニックＩｐマネジメント株式会社
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 パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2021543765A priority Critical patent/JPWO2021045026A1/ja
Publication of WO2021045026A1 publication Critical patent/WO2021045026A1/ja

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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
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/029—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by the layout or mutual arrangement of components, e.g. of compressors or fans
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • 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
    • F24F7/10—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 air supply, or exhaust, through perforated wall, floor or ceiling

Definitions

  • the present invention relates to an air supply device that supplies outdoor air into a room.
  • a ventilation device in which a refrigeration cycle composed of an evaporator, a condenser, and a compressor is provided to exhaust indoor air, and dehumidify the circulating air during air circulation and supply it into the room is known. ..
  • the ventilation device 100 when performing a dehumidifying operation, moist air is directly drawn from the room without passing through a duct, dehumidified by cooling, and then dry air is blown into the room again without passing through a duct. Met. That is, although the duct is connected to the ventilation device 100, the circulation air passage is used during the dehumidifying operation, and it is irrelevant to the length of the duct.
  • the ventilation device 100 is used for exhaust gas in the first place, it is assumed here that the ventilation device 100 is used for supplying air to a building or a house.
  • the length of the duct connected to the ventilation device 100 varies depending on the construction state of the house.
  • the load on the fan motor may increase and the air volume may be lower than the predetermined air volume.
  • the compressor 102 cannot be cooled properly, the performance of the refrigeration cycle of the ventilation device is lowered, and there is a possibility that the dehumidification amount is lowered.
  • an object of the present invention is to provide an air supply device capable of efficiently dehumidifying supply air regardless of the construction state of a house.
  • the air supply device includes a housing having an outdoor suction port and an indoor air outlet, and an air supply air passage communicating the outdoor suction port and the indoor air outlet.
  • An air supply fan motor that guides air from the outdoor suction port to the indoor air outlet, a dehumidifying part that dehumidifies the air flowing through the air supply air passage by a refrigerant cycle using a compressor, and a duct that guides the outside air to the outdoor suction port.
  • the air supply device is provided with a constant air volume control unit that controls the air volume to a predetermined constant air volume, and the compressor is provided in the air supply air passage and is cooled by the air maintained at a constant air volume by the constant air volume control unit. ..
  • the compressor can be effectively cooled, so that the dehumidifying air can be stably supplied to the room.
  • FIG. 1 is a schematic view of an air supply device according to a first embodiment of the present invention.
  • FIG. 2 is a flowchart showing fan motor output control executed by the constant air volume control unit.
  • FIG. 3 is a schematic view of an air supply device according to a second embodiment of the present invention.
  • FIG. 4 is a flowchart showing control in the dehumidification priority mode when a temperature sensor is used for the compressor.
  • FIG. 5 is a schematic cross-sectional view showing a conventional ventilation device.
  • FIG. 1 is a schematic view schematically showing an air supply device 1.
  • the air supply device 1 has an outdoor suction port 3 on the side surface of the main body 2 which is a box-shaped housing, and an indoor air outlet 4 on the side surface facing the side surface.
  • the main body 2 is provided, for example, in the attic, under the floor, or inside the wall of a house.
  • the outdoor suction port 3 is connected to the outside via an external duct, and outdoor air is guided into the main body 2 via the external duct.
  • the indoor air outlet 4 is connected to the room via an internal duct, and guides the air in the main body 2 into the room.
  • the air supply device 1 includes an air supply air passage 7, an air supply fan motor 10, and a dehumidifying unit 12.
  • the air supply air passage 7 communicates the outdoor suction port 3 and the indoor air outlet 4 inside the main body 2.
  • the air supply fan motor 10 guides air from the outdoor suction port 3 to the indoor air outlet 4 by the rotation of the fan, and as a result, sends air from the outdoor to the indoor.
  • the dehumidifying unit 12 is provided in the air supply air passage 7 and dehumidifies the outdoor air passing through the air supply air passage 7. More specifically, the dehumidifying unit 12 utilizes a refrigeration cycle to dehumidify the outdoor air via an evaporator, and heat the dehumidified air cooled by the dehumidification via a condenser. The heated dehumidified air is blown into the room after cooling the compressor 13 that has generated heat due to the action of the refrigeration cycle.
  • the outdoor air introduced from the outdoor suction port 3 passes through the dehumidifying section 12 and is supplied to the indoor air outlet 4, so that the outdoor air can be introduced and dehumidified.
  • the air supply device 1 includes a constant air volume control unit 11 that controls the air flow of the air supply fan motor 10 to a predetermined air volume.
  • FIG. 2 is a flowchart showing a process of constant air volume control.
  • S an acronym.
  • S1 and the like refer to a processing step.
  • the magnitude of the numerical value indicating the processing step and the processing order are irrelevant.
  • the constant air volume control unit 11 When the constant air volume control is executed, the constant air volume control unit 11 first determines the target air volume (S1). For example, the target air volume may be set to 200 m 3 / h and stored in the air volume constant control unit 11 of the air supply device 1, or an input unit may be provided in the air supply device 1 to input the air volume.
  • the target air volume may be set to 200 m 3 / h and stored in the air volume constant control unit 11 of the air supply device 1, or an input unit may be provided in the air supply device 1 to input the air volume.
  • the constant air volume control unit 11 applies a speed indicator voltage (hereinafter referred to as Vsp) at startup according to the target air volume to the air supply fan motor 10 (S2).
  • Vsp speed indicator voltage
  • the Vsp at startup may be, for example, 2.5 V, and may be an output capable of producing the torque required to start the movement of the DC motor.
  • the constant air volume control unit 11 detects the current and the rotation speed of the air supply fan motor 10 every T seconds for a predetermined time (S3).
  • a Hall IC is provided inside the DC motor, which is an example of the air supply fan motor 10.
  • the Hall IC outputs a pulse signal each time the DC motor rotates by a certain angle.
  • the microcomputer of the air volume constant control unit 11 detects the pulse signal, and derives the rotation speed of the air supply fan motor 10 from the number of pulse signals in a fixed time.
  • a low resistance shunt resistor is connected to the motor drive circuit, and the voltage between the shunt resistors is detected by a microcomputer.
  • the constant air volume control unit 11 derives a current from the voltage and shunt resistance detected by the microcomputer.
  • the predetermined time T seconds for the air volume constant control unit 11 to detect the current of the air supply fan motor 10 and the rotation speed is, for example, 1 second, and the current / rotation speed of the air supply fan motor 10 measured every 100 ms. By setting the moving average value of the value of 1 to 1 second, it may be less affected by noise.
  • the constant air volume control unit 11 refers to the current / rotation speed table (S4).
  • the current and the target rotation speed for the current which are experimentally determined in advance, are stored in association with each other. That is, the target rotation speed can be obtained by referring to the current / rotation speed table based on the current.
  • the constant air volume control unit 11 compares the current rotation speed of the air supply fan motor 10 with the target rotation speed (S5).
  • the current rotation speed of the air supply fan motor 10 and the target rotation speed are different, the current rotation speed of the air supply fan motor 10 and the target rotation speed obtained through the current / rotation speed table are different.
  • the Vsp of the air supply fan motor 10 is determined based on the difference.
  • the Vsp to be determined from the difference between the current rotation speed and the target rotation speed is also stored as a table in which the rotation speed difference and the Vsp to be applied to the rotation speed difference, which are experimentally determined in advance, are associated with each other.
  • the Vsp is determined by referring to the table.
  • the output of the air supply fan motor 10 is changed so that the target air volume is obtained (S5No ⁇ S6). After that, the process proceeds to S3.
  • the air volume is controlled to be constant by repeating the processes of S3 to S7.
  • the air supply device 1 can prevent the air supply air volume from decreasing due to the length of the connected external duct, and can supply a constant air volume to the room. Further, since the ventilation device can be installed regardless of the length of the external duct, the workability of the installer is improved.
  • the temperature of the compressor 13 rises and the dehumidification efficiency decreases when the air volume decreases.
  • the compressor 13 is always cooled constantly, and dehumidification can be performed without lowering the dehumidification efficiency.
  • the air volume is maintained at a predetermined level regardless of the construction state of the house, and the compressor 13 is cooled so that the air can be efficiently supplied and dehumidified in the room.
  • the second embodiment is control when the compressor temperature sensor 14 is used for the compressor 13.
  • the air supply device 1 of the second embodiment will be described focusing on the differences from the air supply device 1 of the first embodiment.
  • the same components as those of the air supply device 1 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
  • FIG. 3 is a schematic view schematically showing the air supply device 1 according to the second embodiment.
  • the air supply device 1 according to the second embodiment includes a compressor temperature sensor 14 and a control unit 15.
  • the compressor temperature sensor 14 detects the temperature of the compressor 13.
  • the control unit 15 controls to select between a dehumidification priority mode that prioritizes dehumidification of air and an air volume priority mode that prioritizes constant air volume control.
  • the air volume priority mode is a mode in which the air flow of the air supply fan motor 10 is controlled to a predetermined air volume.
  • the air volume constant control unit 11 performs the air volume constant control shown in the first embodiment.
  • the dehumidification priority mode is a mode in which the compressor 13 is appropriately cooled by increasing a predetermined air volume when the temperature of the compressor 13 is rising, and the heat generation of the compressor 13 is suppressed. As a result, the dehumidifying capacity via the compressor 13 is maintained within an appropriate range, so that the room can be efficiently dehumidified. Further, when the temperature of the compressor 13 is lowered, the predetermined air volume may be reduced. As a result, the compressor 13 can be cooled with an appropriate air volume, and the energy consumption of the air supply fan motor 10 can be reduced.
  • FIG. 4 is a flowchart showing a process of controlling the dehumidification priority mode.
  • S11 to S12 is the same as that of S1 to S2 in the flowchart of FIG. 2 described above, and thus the description thereof will be omitted.
  • the constant air volume control unit 11 acquires the temperature of the compressor 13 from the compressor temperature sensor 14 (S13).
  • the constant air volume control unit 11 changes the target air volume based on the temperature of the compressor 13 (S14).
  • a method of changing the target air volume will be described. For example, an experiment is conducted in advance to determine a target temperature of the compressor 13 capable of efficiently dehumidifying.
  • the constant air volume control unit 11 raises the target air volume in order to lower the temperature of the compressor 13.
  • the constant air volume control unit 11 lowers the target air volume because the compressor 13 is cooled more than necessary.
  • S15 to S19 is the same as that of S3 to S7 in the flowchart of FIG. 2 described above, and thus the description thereof will be omitted.
  • the target air volume can be changed according to the temperature of the compressor 13.
  • the compressor when the temperature of the compressor 13 is rising, the compressor can be appropriately cooled by increasing the predetermined air volume, and the heat generation of the compressor 13 can be suppressed. That is, the air supply device 1 can suppress the heat generation of the compressor 13 and efficiently dehumidify. Further, when the temperature of the compressor is lowered, the compressor can be cooled with an appropriate air volume by reducing the predetermined air volume, and the energy consumption of the air supply fan motor 10 can be reduced. ..
  • the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments, and it is easy to make various improvements and modifications within a range that does not deviate from the gist of the present invention. It can be inferred. Further, the numerical values given in each of the above embodiments are examples, and it is naturally possible to adopt other numerical values.
  • the air supply device includes a housing having an outdoor suction port and an indoor air outlet, an air supply air passage communicating the outdoor air inlet and the indoor air outlet, and an outdoor air inlet to the indoor side.
  • An air supply fan motor that guides air to the air outlet, a dehumidifying section that dehumidifies the air flowing through the air supply air passage by a refrigerant cycle using a compressor, and an external duct or casing that is a duct that guides the outside air to the outdoor suction port.
  • Controls at least one of the internal duct which is a duct that guides the dehumidified air in the body from the indoor outlet to the room, and the air volume that is blown through the air supply fan motor regardless of the length of the duct to a predetermined constant air volume.
  • the compressor is provided in the air supply air passage, and is cooled by the air maintained at a constant air volume by the air volume constant control unit.
  • the control unit detects the current and rotation speed of the air supply fan motor and controls the output of the air supply fan motor so that the air volume becomes a predetermined value.
  • the control unit detects the current and rotation speed of the air supply fan motor and controls the output of the air supply fan motor so that the air volume becomes a predetermined value.
  • the air supply device of the present invention may include a compressor temperature sensor that detects the temperature of the compressor.
  • the effect of appropriately cooling the compressor and suppressing the heat generation of the compressor can be obtained by increasing the predetermined air volume. Further, when the temperature of the compressor is lowered, the predetermined air volume may be reduced. As a result, the compressor can be cooled with an appropriate air volume, and the effect of reducing the energy consumption of the air supply fan motor can be obtained.
  • the housing of the present invention may be provided in the attic, under the floor, or in the wall. This makes it possible to obtain the effect that the housing can be installed in various places.
  • the air supply device according to the present invention is effective as an air supply device that supplies outdoor air into the room and dehumidifies the room.
  • Air supply device 2 Main body 3 Outdoor suction port 4 Indoor air outlet 7, 101 Air supply air passage 10 Air supply fan motor 11 Constant air volume control unit 12 Dehumidifying unit 13, 102 Compressor 14 Compressor temperature sensor 15 Control unit

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)
PCT/JP2020/032984 2019-09-02 2020-09-01 給気装置 WO2021045026A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021543765A JPWO2021045026A1 (enrdf_load_stackoverflow) 2019-09-02 2020-09-01

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019159288 2019-09-02
JP2019-159288 2019-09-02

Publications (1)

Publication Number Publication Date
WO2021045026A1 true WO2021045026A1 (ja) 2021-03-11

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PCT/JP2020/032984 WO2021045026A1 (ja) 2019-09-02 2020-09-01 給気装置

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JP (1) JPWO2021045026A1 (enrdf_load_stackoverflow)
WO (1) WO2021045026A1 (enrdf_load_stackoverflow)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0468929U (enrdf_load_stackoverflow) * 1990-10-24 1992-06-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0468929U (enrdf_load_stackoverflow) * 1990-10-24 1992-06-18

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