WO2015151280A1 - Indoor unit for air conditioning device - Google Patents

Indoor unit for air conditioning device Download PDF

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Publication number
WO2015151280A1
WO2015151280A1 PCT/JP2014/059984 JP2014059984W WO2015151280A1 WO 2015151280 A1 WO2015151280 A1 WO 2015151280A1 JP 2014059984 W JP2014059984 W JP 2014059984W WO 2015151280 A1 WO2015151280 A1 WO 2015151280A1
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WO
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Prior art keywords
blower
vane
indoor unit
protection device
detecting
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PCT/JP2014/059984
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French (fr)
Japanese (ja)
Inventor
悠介 桑原
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三菱電機株式会社
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Priority to PCT/JP2014/059984 priority Critical patent/WO2015151280A1/en
Publication of WO2015151280A1 publication Critical patent/WO2015151280A1/en

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    • 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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/00077—Indoor units, e.g. fan coil units receiving heat exchange fluid entering and leaving the unit as a liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/32—Details or features not otherwise provided for preventing human errors during the installation, use or maintenance, e.g. goofy proof

Definitions

  • the present invention relates to an indoor unit of an air conditioner having a protection function.
  • a conventional inverter-controlled air conditioner has a compressor placed in the casing of an outdoor unit, and controls the operating frequency of the compressor when the operating current of the compressor reaches the operating current of the compressor protection device.
  • the operating current of the compressor reaches the release current of the compressor protection device due to the decrease of the operating frequency
  • the operating frequency of the compressor is increased by the predetermined value by the control device. It was common (see, for example, Patent Document 1). For this reason, in the compressor, the operation was not stopped even when the current reached the operating current of the protective device.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an indoor unit of an air conditioner that can continue driving without stopping the blower during maintenance.
  • An indoor unit of an air conditioner has a suction port and a blower outlet, a housing provided with a service panel that is removed during maintenance, a heat exchanger placed in the housing, and a housing.
  • a blower that sucks air from the suction port and discharges the air from the outlet through the heat exchanger, a control device that controls the blower, and a protection device that stops the blower and protects the blower, The control device continues the driving of the blower so that the protection device does not operate during maintenance.
  • the present invention can continue driving without stopping the blower by keeping the drive current of the blower from exceeding the operating current of the protection device at the time of maintenance.
  • FIG. 1 is a front view schematically showing a configuration of an indoor unit (hereinafter simply referred to as an indoor unit) 1 of an air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the indoor unit 1 which concerns on this Embodiment is provided with the housing
  • a heat exchanger 2 is disposed in the housing 1a.
  • the housing 1a is provided with a suction port 3 in the upper part and a blower outlet 4 in the lower part.
  • a blower 5 is provided in the vicinity of the air outlet 4.
  • electronic components such as the microcomputer 6 are mounted in the housing 1a.
  • a service panel 7 is attached to the wall surface of the housing 1a.
  • a sensor 8 is attached in the vicinity of the service panel 7.
  • the heat exchanger 2 is connected to a compressor, a heat exchanger, an expansion valve, and a refrigerant pipe mounted in an outdoor unit (not shown) to constitute a refrigeration cycle.
  • the blower 5 sucks air from the suction port 3 provided on the upper surface of the housing 1 a of the indoor unit 1, and sends the air exchanged by the heat exchanger 2 from the blower outlet 4. Discharge.
  • the example shown in FIG. 1 is an example of the air conditioner for computers which blows off from a free access floor (under the floor), the positions of the inlet 3 and the outlet 4 may be appropriately changed according to the use. .
  • FIG. 2 is a diagram (a front view (a), a side view (b), and a bottom view (c)) schematically showing the appearance of the housing 1a of the indoor unit 1 in FIG.
  • a plurality of service panels 7 are attached to the front and side of the housing 1a.
  • the service panel 7 is a removable panel. For example, when the maintenance of the indoor unit 1 is performed, the service panel 7 is removed from the casing 1a of the indoor unit 1, and when the maintenance is completed, the service panel 7 is attached to the casing 1a of the indoor unit 1.
  • the arrangement of the service panel 7 is not limited to the example of FIG. 2 and is appropriately provided according to the maintenance site in the housing 1a.
  • FIG. 3 is a schematic block diagram showing a control system of the indoor unit 1 of FIG.
  • the indoor unit 1 includes a microcomputer 6.
  • the microcomputer 6 has functions of a protection device 6a and a control unit 6b.
  • the microcomputer 6 receives signals from the sensor 8 and the current detector 10.
  • the signal from the sensor 8 is a signal corresponding to the removal of the service panel 7.
  • the signal from the current detector 10 is a signal indicating the drive current of the blower 5.
  • the control output of the microcomputer 6 is supplied to the inverter circuit 15.
  • the inverter circuit 15 drives the blower 5.
  • the control unit 6b and the inverter circuit 15 correspond to the control device 20 of the present invention.
  • the temperature sensor 10a is shown in FIG. 3, it is used in the following description and will be ignored in the description here. This also applies to FIGS. 6, 8, and 10 described later.
  • the protective device 6a is set to the operating current 6c, and when the driving current of the blower 5 exceeds the operating current 6c, the protective device 6a is stopped by the inverter circuit 15 via the control unit 6b (or directly). Is supplied to stop the operation of the blower 5. However, in the first embodiment, it is considered that the protection device 6a does not operate during maintenance.
  • control unit 6b When the control unit 6b receives a signal indicating that the service panel 7 has been removed from the sensor 8, the control unit 6b causes the inverter circuit 15 to reduce the frequency of the drive current of the blower 5. Thereafter, when the control unit 6b receives a signal to which the service panel 7 is attached from the sensor 8, the control unit 6b controls the inverter circuit 15 to restore the frequency of the drive current of the blower 5 to the original state. As a result, the current value detected by the current detector 10 does not exceed the operating current 6c set in advance in the protection device 6a, so that the drive can be continued without stopping the blower 5.
  • a predetermined value is set in the control device 20 in advance as the frequency to be changed. For example, when determining the set value of the frequency, assuming that the in-machine pressure loss of the indoor unit 1 decreases by 60 Pa and the current value increases by 2 A when the service panel 7 is removed, the frequency for decreasing the increase is measured in advance. By reducing the amount of the measured frequency when the service panel 7 is removed, it is possible to minimize the reduction in the capacity of the air conditioner.
  • the frequency can be set appropriately. For example, if the current value during normal operation is set to 10A, the current value at which the protective device operates is set to 12A, and the current value increases by 2A when the service panel 7 is removed, the frequency of the drive device is determined by a test performed in advance. If it is known that the current value is reduced by 2 A when the current is reduced by 2 Hz, the driving device is designed so that the decrease in the performance of the air conditioner is minimized within a range not exceeding 12 A of the current value at which the protective device 6 a operates. This frequency may be reduced by 1 to 2 Hz.
  • FIG. 4 is a flowchart for explaining the control operation of the indoor unit 1 according to the first embodiment of the present invention. Hereinafter, based on each step of FIG. 4, it demonstrates, referring FIG.
  • the current value detected by the current detector 10 is reduced by reducing the frequency of the drive current of the blower 5 by decreasing the frequency of the drive current of the blower 5 during maintenance.
  • the operating current 6c is not exceeded. Therefore, even when the service panel 7 is removed and maintenance work is performed, the driving of the blower 5, that is, the operation of the indoor unit 1 can be continued.
  • it is not necessary to stop the operation of the indoor unit 1, and there is no redundancy in capacity, and maintenance can be performed even when the operation of the indoor unit 1 cannot be stopped.
  • it is not necessary to stop the indoor unit 1 when performing maintenance not directly related to the rotation of the blower 5 such as inspection of the float switch, switching of DipSW, switching of contact input, and filter replacement.
  • the protection device 6a is controlled to operate when the driving current of the blower 5 exceeds the operating current 6c, but the operating temperature 6c is set to the protecting device 6a instead of the operating current 6c. You may do it.
  • a form in which the protection device 6a is activated when the temperature of the fan motor 5a of the blower 5 detected by the temperature sensor 10a (see FIG. 3) exceeds the operating temperature 6c is also included in the present invention. Also in this case, when the service panel 7 is removed, the frequency of the drive current of the blower 5 is reduced in the same manner as in the above example.
  • the temperature sensor 10a corresponds to “temperature detection means” in the present invention.
  • FIG. FIG. 5 is a front view schematically showing the configuration of the indoor unit 1 according to Embodiment 2 of the present invention.
  • the operation of the protection device 6a due to the decrease in the frequency of the blower 5 is prevented.
  • the air path resistance is adjusted instead, and the operation of the protection device 6a is performed. The form which prevents is demonstrated.
  • the indoor unit 1 in FIG. 5 is different from the indoor unit 1 in FIG. 1 in that a vane 12 provided at the outlet 4 and a vane drive motor 13 are added.
  • the vane 12 is rotatably provided at the air outlet 4 and adjusts the flow direction of the air discharged from the air outlet 4 by controlling the rotation of the vane drive motor 13.
  • the air outlet 4 is controlled to be closed during maintenance work, and the air outlet 4 is controlled to be released when the maintenance work is completed.
  • FIG. 6 is a schematic block diagram showing an indoor unit control system according to Embodiment 2 of the present invention.
  • a vane drive circuit 16 and two vane drive motors 13 driven by the vane drive circuit 16 are added in comparison with FIG.
  • the control unit 6b, the inverter circuit 15 and the vane drive circuit 16 constitute the control device 20 of the present invention.
  • control unit 6 b When the control unit 6 b receives a signal indicating that the service panel 7 has been removed from the sensor 8, the control unit 6 b drives the vane drive circuit 16 to drive the vane drive motor 13 and controls the vane 12 to rotate in the direction of closing the outlet 4. Thereafter, when the control unit 6b receives a signal to which the service panel 7 is attached from the sensor 8, the control unit 6b controls the rotation of the vane drive circuit 16 to drive the vane drive motor 13 so that the angle of the vane 12 is restored.
  • the in-machine pressure loss of the indoor unit 1 decreases. At this time, by changing the vane angle in a direction to close the outlet 4, the out-of-machine pressure loss of the indoor unit 1 is increased and the blower is driven. An increase in current frequency can be suppressed.
  • FIG. 7 is a flowchart for explaining the control operation of the indoor unit 1 according to Embodiment 2 of the present invention. Hereinafter, based on each step of FIG. 7, it demonstrates, referring FIG.
  • the control unit 6b takes in a signal from the sensor 8 and outputs a control signal for causing the vane drive circuit 16 to control the rotation of the vane 12 in the direction of closing the outlet 4.
  • the vane drive circuit 16 controls the rotation of the vane 12 in a direction to close the air outlet 4.
  • the sensor 8 When the maintenance is completed and the service panel 7 is attached, the sensor 8 outputs a signal corresponding to the sensor.
  • the control unit 6b takes in a signal from the sensor 8 and outputs a control signal for causing the vane drive circuit 16 to perform rotation control in a direction to return the angle of the vane 12 to the original state.
  • the vane drive circuit 16 controls the rotation of the vane 12 so that the angle of the vane 12 is restored.
  • the current value detected by the current detector 10 is prevented by increasing the internal pressure loss of the indoor unit 1 due to the removal of the service panel 7 during maintenance, blocking the outlet 4 and increasing the external pressure loss of the indoor unit. Does not exceed the operating current 6c of the protective device 6a. Therefore, even when the service panel 7 is removed and maintenance work is performed, the driving of the blower 5, that is, the operation of the indoor unit 1 can be continued.
  • the protection device 6a is controlled to operate when the driving current of the blower 5 exceeds the operating current 6c, but the operating temperature 6c is set to the protecting device 6a instead of the operating current 6c. You may do it.
  • a form in which the protection device 6a is activated when the temperature of the fan motor 5a of the blower 5 detected by the temperature sensor 10a (see FIG. 6) exceeds the operating temperature 6c is also included in the present invention. Also in this case, when the service panel 7 is removed, the vane 12 is controlled to rotate in a direction to close the outlet 4 as in the above example.
  • the motor since the external static pressure is increased by blocking the air outlet 4 without changing the frequency of the fan motor 5a and the increase in the current value is suppressed, the motor is not an inverter drive motor. It is also effective for constant speed motors.
  • FIG. FIG. 8 is a schematic block diagram showing an indoor unit control system according to Embodiment 3 of the present invention.
  • Embodiment 1 described above is an example in which the frequency of the drive current that is the output of the inverter circuit 15 is reduced.
  • the operating current 6c of the protection device 6a is changed during maintenance. Is different. For this reason, in Embodiment 3, the operating current 6c of the protection device 6a is rewritten to a large value during maintenance.
  • the operating current 6c (and operating temperature 6c) of the protection device 6a is often set to prevent the fan motor 5a from failing when an overcurrent continues for a long time. There are many cases where there is no problem even if the operating current 6c is increased. Work that involves removing the service panel 7 without stopping the operation of the indoor unit 1 includes float switch maintenance, DipSW change, contact port output, filter replacement, etc., all of which work in a short time. is there. Therefore, for example, after removing the service panel 7, it is possible to introduce a control for increasing the maximum allowable value by 10% for 10 minutes.
  • FIG. 9 is a flowchart illustrating the control operation of the indoor unit 1 according to the third embodiment of the present invention.
  • S300 When the service panel 7 is removed during the operation of the air conditioner, the sensor 8 outputs a signal in response thereto.
  • the control unit 6b takes in the signal from the sensor 8 and rewrites the operating current 6c of the protection device 6a to a large value.
  • S302 The designated time elapses after the control unit 6b takes in the signal from the sensor 8.
  • S303 When the maintenance is completed and the service panel 7 is attached, the sensor 8 outputs a signal corresponding to the sensor.
  • S304 The control unit 6b takes in the signal from the sensor 8 and returns the operating current 6c of the protection device 6a to the original value.
  • the service panel 7 can be attached and detached even during operation without reactivating the protection device 6a by rewriting the operating current 6c at which the protection device 6a operates to a large value.
  • the protection device 6a is controlled to operate when the driving current of the blower 5 exceeds the operating current 6c, but the operating temperature 6c is set to the protecting device 6a instead of the operating current 6c. You may do it.
  • a form in which the protective device 6a is activated when the temperature of the fan motor 5a of the blower 5 detected by the temperature sensor 10a (see FIG. 8) exceeds the operating temperature 6c is also included in the present invention. Also in this case, when the service panel 7 is removed, the operating temperature 6c is rewritten to a large value as in the above example.
  • FIG. 10 is a schematic block diagram showing an indoor unit control system according to Embodiment 4 of the present invention.
  • the operation unit 17 is provided with a maintenance mode and is operated. Therefore, it is determined that maintenance work is in progress.
  • FIG. 11 is a flowchart illustrating the control operation of the indoor unit 1 according to the fourth embodiment of the present invention. Hereinafter, based on each step of FIG. 11, it demonstrates, referring FIG.
  • the current detector 10 detects an increase in the current value and outputs a signal in response thereto.
  • the control unit 6b takes in the signal from the current detector 10 and outputs a control signal for reducing the frequency to the inverter circuit 15, and controls the rotation of the vane 12 in the direction in which the vane 12 is closed in the vane drive circuit 16. The control signal for making it output is output.
  • the inverter circuit 15 lowers the frequency of the blower 5, and the vane drive circuit 16 controls the rotation of the vane 12 in the direction of closing the outlet 4.
  • S403 The current detector 10 detects that the current value returns to the normal value, and outputs a signal in response thereto.
  • the control unit 6b takes in the signal from the current detector 10 and outputs a control signal for reducing the frequency to the inverter circuit 15, and controls the rotation of the vane 12 in the direction in which the vane 12 is closed in the vane drive circuit 16.
  • the control signal for making it output is output.
  • the inverter circuit 15 restores the frequency of the blower 5 and the vane drive circuit 16 controls the rotation of the vane 12 in the direction to restore the angle.
  • control for changing the frequency of the blower 5 and the angle of the vane 12 is performed.
  • either one of the controls may be performed.
  • the protection device 6a when the driving current of the blower 5 exceeds the operating current 6c, the protection device 6a is controlled. However, instead of the operating current 6c, the operating temperature 6c is changed to the protecting device 6a. You may make it set. A form in which the protective device 6a is activated when the temperature of the fan motor 5a of the blower 5 detected by the temperature sensor 10a (see FIG. 10) exceeds the operating temperature 6c is also included in the present invention. Also in this case, when the service panel 7 is removed, the operating temperature 6c is rewritten to a large value as in the above example.
  • the senor is described, but the sensor refers to a sensor that can detect removal of the service panel, such as a proximity sensor such as a contact sensor and a touch sensor.
  • the service panel includes a panel that is removed when performing maintenance of a service window, a service door, and the like.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The purpose of the present invention is to provide a function which, during maintenance, allows an indoor unit to continue to operate without stopping a drive device for an air blower. An indoor unit for an air conditioning device comprises: a housing (1a) provided with a suction opening (3), a discharge opening (4), and a service panel (7) which is removed for maintenance; a heat exchanger (2) mounted within the housing (1a); an air blower (5) provided within the housing (1a) and configured so that the air blower (5) sucks in air from the suction opening (3) and discharges the air from the discharge opening (4) after causing the air to pass through the heat exchanger (2); a control device (20) for controlling the air blower (5); and a protective device (6a) for stopping the operation of the air blower (5) and protecting the air blower (5). During maintenance, the control device (20) keeps the protective device (6a) from operating and allows the air blower (5) to continue to operate.

Description

空気調和装置の室内機Air conditioner indoor unit
　本発明は、保護機能を有する空気調和装置の室内機に関する。 The present invention relates to an indoor unit of an air conditioner having a protection function.
　従来のインバーター制御方式の空気調和装置は、室外機の筐体内に圧縮機を配置し、圧縮機の運転電流が圧縮機の保護装置の動作電流に達したときは、圧縮機の運転周波数を制御装置によって所定値だけ減少させ、逆にこの運転周波数の減少によって圧縮機の運転電流が圧縮機の保護装置の解除電流に達したときは、圧縮機の運転周波数を制御装置によって所定値だけ増加させるのが一般的であった（例えば、特許文献１参照）。このため、圧縮機においては電流が保護装置の動作電流に達した場合でも運転停止することはなかった。 A conventional inverter-controlled air conditioner has a compressor placed in the casing of an outdoor unit, and controls the operating frequency of the compressor when the operating current of the compressor reaches the operating current of the compressor protection device. When the operating current of the compressor reaches the release current of the compressor protection device due to the decrease of the operating frequency, the operating frequency of the compressor is increased by the predetermined value by the control device. It was common (see, for example, Patent Document 1). For this reason, in the compressor, the operation was not stopped even when the current reached the operating current of the protective device.
特開２００５－０６１７３６号公報Japanese Patent Laid-Open No. 2005-061736
　しかし、従来の室内機の送風機においては、運転電流が保護装置の動作電流に達し、保護装置が作動した場合は、空調装置に重大な異常が発生している場合であるため、送風機の運転停止を回避する手段は特に設けられていなかった。 However, in the conventional indoor fan, when the operating current reaches the operating current of the protective device and the protective device is activated, it is a case where a serious abnormality has occurred in the air conditioner. No means for avoiding this was provided.
　このため、室内機のメンテナンスなどの影響を受けて室内機の機内圧損が減少し、送風機を流れる電流が増加し、保護装置が作動することで、送風機が異常停止するという問題点があった。 For this reason, there is a problem that the pressure loss of the indoor unit is reduced due to the influence of the maintenance of the indoor unit, the current flowing through the blower is increased, and the protection device is activated to cause the blower to stop abnormally.
　本発明は、上述のような課題を解決するためになされたもので、保守時に送風機が停止することなく、駆動を継続することができる空気調和装置の室内機を得ることを目的とする。 The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an indoor unit of an air conditioner that can continue driving without stopping the blower during maintenance.
　本発明に係る空気調和装置の室内機は、吸込口及び吹出口を有するとともに、保守時に取り外されるサービスパネルを備えた筐体と、筐体内に載置された熱交換器と、筐体内に設けられ、吸込口から空気を吸引し、熱交換器を経由して吹出口から空気を排出させる送風機と、送風機を制御する制御装置と、送風機の駆動を停止して送風機を保護する保護装置と、を備え、制御装置は、保守時に、保護装置が動作しないようにして、前記送風機の駆動を継続させるものである。 An indoor unit of an air conditioner according to the present invention has a suction port and a blower outlet, a housing provided with a service panel that is removed during maintenance, a heat exchanger placed in the housing, and a housing. A blower that sucks air from the suction port and discharges the air from the outlet through the heat exchanger, a control device that controls the blower, and a protection device that stops the blower and protects the blower, The control device continues the driving of the blower so that the protection device does not operate during maintenance.
　本発明は、保守時に送風機の駆動電流が保護装置の動作電流を超えないようにすることで、送風機が停止することなく、駆動を継続することができる。 The present invention can continue driving without stopping the blower by keeping the drive current of the blower from exceeding the operating current of the protection device at the time of maintenance.
本発明の実施形態１における空気調和装置の室内機の構成を模式的に示した正面図である。It is the front view which showed typically the structure of the indoor unit of the air conditioning apparatus in Embodiment 1 of this invention. 本発明の実施形態１における室内機の外観を模式的に示した図である。It is the figure which showed typically the external appearance of the indoor unit in Embodiment 1 of this invention. 本発明の実施形態１における室内機の制御系を示す概略ブロック図である。It is a schematic block diagram which shows the control system of the indoor unit in Embodiment 1 of this invention. 本発明の実施形態１における室内機１の制御動作を説明するフローチャートである。It is a flowchart explaining the control operation of the indoor unit 1 in Embodiment 1 of this invention. 本発明の実施形態２における室内機の構成を模式的に示した正面図である。It is the front view which showed typically the structure of the indoor unit in Embodiment 2 of this invention. 本発明の実施形態２における室内機の制御系を示す概略ブロック図である。It is a schematic block diagram which shows the control system of the indoor unit in Embodiment 2 of this invention. 本発明の実施形態２における室内機の制御動作を説明するフローチャートである。It is a flowchart explaining the control operation of the indoor unit in Embodiment 2 of this invention. 本発明の実施形態３における室内機の制御系を示す概略ブロック図である。It is a schematic block diagram which shows the control system of the indoor unit in Embodiment 3 of this invention. 本発明の実施形態３における室内機の制御動作を説明するフローチャートである。It is a flowchart explaining the control operation of the indoor unit in Embodiment 3 of this invention. 本発明の実施形態４における室内機の制御系を示す概略ブロック図である。It is a schematic block diagram which shows the control system of the indoor unit in Embodiment 4 of this invention. 本発明の実施形態４における室内機の制御動作を説明するフローチャートである。It is a flowchart explaining the control operation of the indoor unit in Embodiment 4 of this invention.
実施の形態１．
　図１は、本発明の実施の形態１における空気調和装置の室内機（以下、単に室内機という）１の構成を模式的に示した正面図である。
　図１に示されるように、本実施の形態に係る室内機１は、筐体１ａを備えている。筐体１ａ内には熱交換器２が配置されている。筐体１ａは、その上部に吸込口３が設けられ、下部に吹出口４が設けられている。吹出口４の近傍には送風機５が設けられている。また、筐体１ａ内にはマイコン６等の電子部品が搭載されている。筐体１ａの壁面にはサービスパネル７が取付けられている。サービスパネル７の近傍にはセンサ８が取付けられている。なお、熱交換器２は、室外機（図示せず）に搭載された圧縮機、熱交換器及び膨張弁と冷媒配管によって接続されて冷凍サイクルを構成している。 Embodiment 1 FIG.
FIG. 1 is a front view schematically showing a configuration of an indoor unit (hereinafter simply referred to as an indoor unit) 1 of an air-conditioning apparatus according to Embodiment 1 of the present invention.
As FIG. 1 shows, the indoor unit 1 which concerns on this Embodiment is provided with the housing | casing 1a. A heat exchanger 2 is disposed in the housing 1a. The housing 1a is provided with a suction port 3 in the upper part and a blower outlet 4 in the lower part. A blower 5 is provided in the vicinity of the air outlet 4. In addition, electronic components such as the microcomputer 6 are mounted in the housing 1a. A service panel 7 is attached to the wall surface of the housing 1a. A sensor 8 is attached in the vicinity of the service panel 7. The heat exchanger 2 is connected to a compressor, a heat exchanger, an expansion valve, and a refrigerant pipe mounted in an outdoor unit (not shown) to constitute a refrigeration cycle.
　図１に示されるように、送風機５は、室内機１の筐体１ａの上面に設けられた吸込口３から空気を吸引して、熱交換器２で熱交換された空気を吹出口４から排出する。なお、図１に示す例は、フリーアクセスフロア（床下）から吹き出す電算機用のエアコンの例であるが、吸込口３及び吹出口４の位置は、その用途に応じて適宜変更してもよい。 As shown in FIG. 1, the blower 5 sucks air from the suction port 3 provided on the upper surface of the housing 1 a of the indoor unit 1, and sends the air exchanged by the heat exchanger 2 from the blower outlet 4. Discharge. In addition, although the example shown in FIG. 1 is an example of the air conditioner for computers which blows off from a free access floor (under the floor), the positions of the inlet 3 and the outlet 4 may be appropriately changed according to the use. .
　図２は、図１の室内機１の筐体１ａの外観を模式的に示した図（正面図（ａ）、側面図（ｂ）、下面図（ｃ））である。　筐体１ａの正面及び側面には複数のサービスパネル７が取付けられている。サービスパネル７は、取り外しが可能なパネルである。例えば、室内機１の保守を行う場合にはサービスパネル７は室内機１の筐体１ａから取り外され、メンテナンスが終了した場合にはサービスパネル７は室内機１の筐体１ａに取り付けられる。なお、サービスパネル７の配置は、図２の例に限定されるものではなく、筐体１ａ内の保守部位に応じて適宜設けられる。 FIG. 2 is a diagram (a front view (a), a side view (b), and a bottom view (c)) schematically showing the appearance of the housing 1a of the indoor unit 1 in FIG. A plurality of service panels 7 are attached to the front and side of the housing 1a. The service panel 7 is a removable panel. For example, when the maintenance of the indoor unit 1 is performed, the service panel 7 is removed from the casing 1a of the indoor unit 1, and when the maintenance is completed, the service panel 7 is attached to the casing 1a of the indoor unit 1. The arrangement of the service panel 7 is not limited to the example of FIG. 2 and is appropriately provided according to the maintenance site in the housing 1a.
　図３は、図１の室内機１の制御系を示す概略ブロック図である。
　図３に示されるように、室内機１は、マイコン６を備えている。マイコン６は、保護装置６ａ及び制御部６ｂの機能を備えている。マイコン６には、センサ８及び電流検知器１０からの信号を入力する。センサ８からの信号は、サービスパネル７の取り外しに応じた信号である。電流検知器１０からの信号は、送風機５の駆動電流を示す信号である。マイコン６の制御出力は、インバーター回路１５に供給される。インバーター回路１５は送風機５を駆動する。なお、制御部６ｂ及びインバーター回路１５は、本発明の制御装置２０に相当する。また、図３には温度センサ１０ａが図示されているが、後述の説明において利用されるものであり、ここでの説明では無視するものとする。こうしたことは、後述の図６、図８及び図１０においても同様である。 FIG. 3 is a schematic block diagram showing a control system of the indoor unit 1 of FIG.
As shown in FIG. 3, the indoor unit 1 includes a microcomputer 6. The microcomputer 6 has functions of a protection device 6a and a control unit 6b. The microcomputer 6 receives signals from the sensor 8 and the current detector 10. The signal from the sensor 8 is a signal corresponding to the removal of the service panel 7. The signal from the current detector 10 is a signal indicating the drive current of the blower 5. The control output of the microcomputer 6 is supplied to the inverter circuit 15. The inverter circuit 15 drives the blower 5. The control unit 6b and the inverter circuit 15 correspond to the control device 20 of the present invention. Further, although the temperature sensor 10a is shown in FIG. 3, it is used in the following description and will be ignored in the description here. This also applies to FIGS. 6, 8, and 10 described later.
　保護装置６ａは、動作電流６ｃが設定されており、送風機５の駆動電流が動作電流６ｃを超えた場合には、保護装置６ａは制御部６ｂを介して（又は直接）インバーター回路１５に運転停止の信号を供給して、送風機５の運転を停止させる。但し、本実施形態１においては、保守時においては、保護装置６ａが動作しないように配慮されている。 The protective device 6a is set to the operating current 6c, and when the driving current of the blower 5 exceeds the operating current 6c, the protective device 6a is stopped by the inverter circuit 15 via the control unit 6b (or directly). Is supplied to stop the operation of the blower 5. However, in the first embodiment, it is considered that the protection device 6a does not operate during maintenance.
　制御部６ｂは、センサ８からサービスパネル７が取り外された信号を受信した場合、インバーター回路１５に送風機５の駆動電流の周波数を減少させる。その後、制御部６ｂはサービスパネル７が取り付けられた信号をセンサ８から受信した場合、インバーター回路１５に送風機５の駆動電流の周波数を元に戻すように制御を行う。これにより、電流検知器１０が検知した電流値が、予め保護装置６ａに設定された動作電流６ｃを超えることがなくなるため、送風機５が停止することなく、駆動を継続することができる。 When the control unit 6b receives a signal indicating that the service panel 7 has been removed from the sensor 8, the control unit 6b causes the inverter circuit 15 to reduce the frequency of the drive current of the blower 5. Thereafter, when the control unit 6b receives a signal to which the service panel 7 is attached from the sensor 8, the control unit 6b controls the inverter circuit 15 to restore the frequency of the drive current of the blower 5 to the original state. As a result, the current value detected by the current detector 10 does not exceed the operating current 6c set in advance in the protection device 6a, so that the drive can be continued without stopping the blower 5.
　上記の変化させる周波数としては、予め所定の値が制御装置２０に設定されているものとする。例えば、周波数の設定値を決定するに際し、サービスパネル７を取り外すと室内機１の機内圧損が６０Ｐａ減少し、電流値が２Ａ増加すると仮定すると、この増加分を下げる周波数を予め測定しておき、サービスパネル７の取り外し時にその測定した周波数の分だけ低下させることで、空気調和装置の能力の低下を最小限に抑えることができる。 It is assumed that a predetermined value is set in the control device 20 in advance as the frequency to be changed. For example, when determining the set value of the frequency, assuming that the in-machine pressure loss of the indoor unit 1 decreases by 60 Pa and the current value increases by 2 A when the service panel 7 is removed, the frequency for decreasing the increase is measured in advance. By reducing the amount of the measured frequency when the service panel 7 is removed, it is possible to minimize the reduction in the capacity of the air conditioner.
　また、サービスパネル７の位置、サイズによってどれだけ機内圧損が減少するか予め測定しておき、それに対応した分だけ送風機５の周波数を低下させることで、周波数の適切な設定ができるようになる。
　例えば、通常運転時の電流値が１０Ａで、保護装置が作動する電流値が１２Ａと設定されていて、サービスパネル７を取り外すと電流値が２Ａ増加する場合、予め行った試験によって駆動装置の周波数を２Ｈｚ減少させると電流値が２Ａ減少することが分かっていれば、保護装置６ａが作動する電流値の１２Ａを超えない範囲で、空気調和装置の能力の低下も最小限になるように駆動装置の周波数を１～２Ｈｚ減少させればよい。 Further, by measuring in advance how much the in-machine pressure loss is reduced depending on the position and size of the service panel 7 and reducing the frequency of the blower 5 by the corresponding amount, the frequency can be set appropriately.
For example, if the current value during normal operation is set to 10A, the current value at which the protective device operates is set to 12A, and the current value increases by 2A when the service panel 7 is removed, the frequency of the drive device is determined by a test performed in advance. If it is known that the current value is reduced by 2 A when the current is reduced by 2 Hz, the driving device is designed so that the decrease in the performance of the air conditioner is minimized within a range not exceeding 12 A of the current value at which the protective device 6 a operates. This frequency may be reduced by 1 to 2 Hz.
　図４は、本発明の実施形態１に係る室内機１の制御動作を説明するフローチャートである。以下、図４の各ステップに基づき、図３を参照しつつ説明する。 FIG. 4 is a flowchart for explaining the control operation of the indoor unit 1 according to the first embodiment of the present invention. Hereinafter, based on each step of FIG. 4, it demonstrates, referring FIG.
　（Ｓ１００）
　空気調和装置の運転中にサービスパネル７が取り外されると、センサ８がそれに反応した信号を出力する。
　（Ｓ１０１）
　制御部６ｂは、センサ８からの信号を取り込んで、インバーター回路１５に周波数を減少させるための制御信号を出力する（すなわち送風機５側に制御指令を送る）。
　（Ｓ１０２）
インバーター回路１５は送風機５の周波数を低下させる。
　（Ｓ１０３）
　保守が終了してサービスパネル７が取り付けられると、センサ８がそれに反応した信号を出力する。
　（Ｓ１０４）
　制御部６ｂは、センサ８からの信号を取り込んで、インバーター回路１５に周波数を元に戻すための制御信号を出力する（すなわち送風機５側に制御指令を送る）。
　（Ｓ１０５）
　インバーター回路１５は送風機５の周波数を元に戻す。 (S100)
When the service panel 7 is removed during the operation of the air conditioner, the sensor 8 outputs a signal in response thereto.
(S101)
The control unit 6b takes in the signal from the sensor 8 and outputs a control signal for reducing the frequency to the inverter circuit 15 (that is, sends a control command to the blower 5 side).
(S102)
The inverter circuit 15 reduces the frequency of the blower 5.
(S103)
When the maintenance is completed and the service panel 7 is attached, the sensor 8 outputs a signal corresponding to the sensor.
(S104)
The control unit 6b takes in the signal from the sensor 8 and outputs a control signal for returning the frequency to the inverter circuit 15 (that is, sends a control command to the blower 5 side).
(S105)
The inverter circuit 15 restores the frequency of the blower 5.
　以上のように、保守時に送風機５の駆動電流の増加分を送風機５の駆動電流の周波数を下げて電流値を落とすようにすることで、電流検知器１０が検知した電流値が保護装置６ａの動作電流６ｃを超えることがなくなる。このためサービスパネル７を取り外して保守作業をしている状態においても、送風機５の駆動、すなわち室内機１の動作を継続することができる。
　これにより、保守をする場合にも、室内機１の運転を停止させる必要がなくなり、能力に冗長性がなく、室内機１の運転停止ができない場合においても保守を実施することができるようになる。例えば、フロートスイッチの点検やＤｉｐＳＷの切替、接点入力の切替、フィルタ交換など、送風機５の回転に直接関係しない保守を行う際には室内機１の停止が必要ではなくなる。 As described above, the current value detected by the current detector 10 is reduced by reducing the frequency of the drive current of the blower 5 by decreasing the frequency of the drive current of the blower 5 during maintenance. The operating current 6c is not exceeded. Therefore, even when the service panel 7 is removed and maintenance work is performed, the driving of the blower 5, that is, the operation of the indoor unit 1 can be continued.
As a result, even when maintenance is performed, it is not necessary to stop the operation of the indoor unit 1, and there is no redundancy in capacity, and maintenance can be performed even when the operation of the indoor unit 1 cannot be stopped. . For example, it is not necessary to stop the indoor unit 1 when performing maintenance not directly related to the rotation of the blower 5 such as inspection of the float switch, switching of DipSW, switching of contact input, and filter replacement.
　本実施形態１では、送風機５の駆動電流が動作電流６ｃを超えた場合に、保護装置６ａが作動する制御となっているが、動作電流６ｃに代えて動作温度６ｃを保護装置６ａに設定するようにしてもよい。温度センサ１０ａ（図３参照）によって検知された送風機５のファンモーター５ａの温度が、動作温度６ｃを超えた場合に保護装置６ａが作動する形態も、本発明に含まれる。この場合においても、サービスパネル７が取り外された場合には、送風機５の駆動電流の周波数を上記の例と同様に減少させる。なお、温度センサ１０ａは、本発明における「温度検知手段」に相当する。 In the first embodiment, the protection device 6a is controlled to operate when the driving current of the blower 5 exceeds the operating current 6c, but the operating temperature 6c is set to the protecting device 6a instead of the operating current 6c. You may do it. A form in which the protection device 6a is activated when the temperature of the fan motor 5a of the blower 5 detected by the temperature sensor 10a (see FIG. 3) exceeds the operating temperature 6c is also included in the present invention. Also in this case, when the service panel 7 is removed, the frequency of the drive current of the blower 5 is reduced in the same manner as in the above example. The temperature sensor 10a corresponds to “temperature detection means” in the present invention.
　実施の形態２．
　図５は、本発明の実施の形態２における室内機１の構成を模式的に示した正面図である。
　上記の実施の形態１では、送風機５の周波数の減少による保護装置６ａの作動を防ぐようにしたが、本実施の形態２では、それに代えて、風路抵抗を調整し、保護装置６ａの作動を防ぐ形態を説明する。 Embodiment 2. FIG.
FIG. 5 is a front view schematically showing the configuration of the indoor unit 1 according to Embodiment 2 of the present invention.
In the first embodiment, the operation of the protection device 6a due to the decrease in the frequency of the blower 5 is prevented. However, in the second embodiment, the air path resistance is adjusted instead, and the operation of the protection device 6a is performed. The form which prevents is demonstrated.
　図５の室内機１は、上記の図１の室内機１との対比では、吹出口４に設けられたベーン１２と、ベーン駆動モーター１３とが追加されている点が相違する。以下、相違点を中心に説明する。
　ベーン１２は、吹出口４に回動自在に設けられており、ベーン駆動モーター１３の回転制御により、吹出口４から排出される空気の流れ方向を調整するものである。本実施の形態２においては、保守作業時には吹出口４を塞ぐ方向に制御され、保守作業が終了したときには吹出口４を解放する方向に制御される。 The indoor unit 1 in FIG. 5 is different from the indoor unit 1 in FIG. 1 in that a vane 12 provided at the outlet 4 and a vane drive motor 13 are added. Hereinafter, the difference will be mainly described.
The vane 12 is rotatably provided at the air outlet 4 and adjusts the flow direction of the air discharged from the air outlet 4 by controlling the rotation of the vane drive motor 13. In the second embodiment, the air outlet 4 is controlled to be closed during maintenance work, and the air outlet 4 is controlled to be released when the maintenance work is completed.
　図６は、本発明の実施の形態２における室内機の制御系を示す概略ブロック図である。
　本実施の形態２は、図３との対比において、ベーン駆動回路１６と、ベーン駆動回路１６により駆動される２個のベーン駆動モーター１３とが追加されている。なお、本実施の形態２においては、制御部６ｂ、インバーター回路１５及びベーン駆動回路１６が本発明の制御装置２０を構成している。 FIG. 6 is a schematic block diagram showing an indoor unit control system according to Embodiment 2 of the present invention.
In the second embodiment, a vane drive circuit 16 and two vane drive motors 13 driven by the vane drive circuit 16 are added in comparison with FIG. In the second embodiment, the control unit 6b, the inverter circuit 15 and the vane drive circuit 16 constitute the control device 20 of the present invention.
　制御部６ｂは、センサ８からサービスパネル７が取り外された信号を受信した場合、ベーン駆動回路１６にベーン駆動モーター１３を駆動させ、ベーン１２が吹出口４を塞ぐ方向に回転制御させる。その後、制御部６ｂはサービスパネル７が取り付けられた信号をセンサ８から受信した場合、ベーン駆動回路１６にベーン駆動モーター１３を駆動させ、ベーン１２の角度を元に戻す方向に回転制御を行う。 When the control unit 6 b receives a signal indicating that the service panel 7 has been removed from the sensor 8, the control unit 6 b drives the vane drive circuit 16 to drive the vane drive motor 13 and controls the vane 12 to rotate in the direction of closing the outlet 4. Thereafter, when the control unit 6b receives a signal to which the service panel 7 is attached from the sensor 8, the control unit 6b controls the rotation of the vane drive circuit 16 to drive the vane drive motor 13 so that the angle of the vane 12 is restored.
　サービスパネル７を取り外すと、室内機１の機内圧損が減少するが、この時、ベーンの角度を吹出口４を塞ぐ方向に変化させることで、室内機１の機外圧損を増やし、送風機の駆動電流の周波数の上昇を抑えることができる。 When the service panel 7 is removed, the in-machine pressure loss of the indoor unit 1 decreases. At this time, by changing the vane angle in a direction to close the outlet 4, the out-of-machine pressure loss of the indoor unit 1 is increased and the blower is driven. An increase in current frequency can be suppressed.
　図７は、本発明の実施形態２に係る室内機１の制御動作を説明するフローチャートである。以下、図７の各ステップに基づき、図６を参照しつつ説明する。 FIG. 7 is a flowchart for explaining the control operation of the indoor unit 1 according to Embodiment 2 of the present invention. Hereinafter, based on each step of FIG. 7, it demonstrates, referring FIG.
　（Ｓ２００）
　　空気調和装置の運転中にサービスパネル７が取り外されると、センサ８がそれに反応した信号を出力する。 (S200)
When the service panel 7 is removed during the operation of the air conditioner, the sensor 8 outputs a signal in response thereto.
　（Ｓ２０１）
　制御部６ｂは、センサ８からの信号を取り込んで、ベーン駆動回路１６にベーン１２を吹出口４を塞ぐ方向へ回転制御させるための制御信号を出力する。
　（Ｓ２０２）
　ベーン駆動回路１６はベーン１２を吹出口４を塞ぐ方向へ回転制御させる。
　（Ｓ２０３）
　保守が終了してサービスパネル７が取り付けられると、センサ８がそれに反応した信号を出力する。
　（Ｓ２０４）
　制御部６ｂは、センサ８からの信号を取り込んで、ベーン駆動回路１６にベーン１２の角度を元に戻す方向へ回転制御させるための制御信号を出力する。
　（Ｓ２０５）
　ベーン駆動回路１６はベーン１２の角度を元に戻す方向へ回転制御させる。 (S201)
The control unit 6b takes in a signal from the sensor 8 and outputs a control signal for causing the vane drive circuit 16 to control the rotation of the vane 12 in the direction of closing the outlet 4.
(S202)
The vane drive circuit 16 controls the rotation of the vane 12 in a direction to close the air outlet 4.
(S203)
When the maintenance is completed and the service panel 7 is attached, the sensor 8 outputs a signal corresponding to the sensor.
(S204)
The control unit 6b takes in a signal from the sensor 8 and outputs a control signal for causing the vane drive circuit 16 to perform rotation control in a direction to return the angle of the vane 12 to the original state.
(S205)
The vane drive circuit 16 controls the rotation of the vane 12 so that the angle of the vane 12 is restored.
　以上のように、保守時にサービスパネル７の取り外しによる室内機１の機内圧損を、吹出口４を塞ぎ機外圧損を増やすことで、電流値の上昇を防ぎ、電流検知器１０が検知した電流値が保護装置６ａの動作電流６ｃを超えることがなくなる。このためサービスパネル７を取り外して保守作業をしている状態においても、送風機５の駆動、すなわち室内機１の動作を継続することができる。 As described above, the current value detected by the current detector 10 is prevented by increasing the internal pressure loss of the indoor unit 1 due to the removal of the service panel 7 during maintenance, blocking the outlet 4 and increasing the external pressure loss of the indoor unit. Does not exceed the operating current 6c of the protective device 6a. Therefore, even when the service panel 7 is removed and maintenance work is performed, the driving of the blower 5, that is, the operation of the indoor unit 1 can be continued.
　本実施形態２では、送風機５の駆動電流が動作電流６ｃを超えた場合に、保護装置６ａが作動する制御となっているが、動作電流６ｃに代えて動作温度６ｃを保護装置６ａに設定するようにしてもよい。温度センサ１０ａ（図６参照）によって検知された送風機５のファンモーター５ａの温度が、動作温度６ｃを超えた場合に保護装置６ａが作動する形態も、本発明に含まれる。この場合においても、サービスパネル７が取り外された場合には、上記の例と同様にベーン１２を吹出口４を塞ぐ方向へ回転制御させる。 In the second embodiment, the protection device 6a is controlled to operate when the driving current of the blower 5 exceeds the operating current 6c, but the operating temperature 6c is set to the protecting device 6a instead of the operating current 6c. You may do it. A form in which the protection device 6a is activated when the temperature of the fan motor 5a of the blower 5 detected by the temperature sensor 10a (see FIG. 6) exceeds the operating temperature 6c is also included in the present invention. Also in this case, when the service panel 7 is removed, the vane 12 is controlled to rotate in a direction to close the outlet 4 as in the above example.
　なお、本実施形態２では、ファンモーター５ａの周波数を変化させることなく、吹出口４を塞ぐことで機外静圧を上昇させ、電流値の上昇を抑えているため、インバーター駆動のモーターではない一定速モーターの場合にも有効である。 In the second embodiment, since the external static pressure is increased by blocking the air outlet 4 without changing the frequency of the fan motor 5a and the increase in the current value is suppressed, the motor is not an inverter drive motor. It is also effective for constant speed motors.
　実施の形態３．
　図８は、本発明の実施の形態３における室内機の制御系を示す概略ブロック図である。上述の実施の形態１は、インバーター回路１５の出力である駆動電流の周波数を低減させた例であるが、本実施の形態３においては、保護装置６ａの動作電流６ｃを保守時に変更する点においては相違する。このため、本実施の形態３においては、保守時に、保護装置６ａの動作電流６ｃが大きな値に書き換えられる。 Embodiment 3 FIG.
FIG. 8 is a schematic block diagram showing an indoor unit control system according to Embodiment 3 of the present invention. Embodiment 1 described above is an example in which the frequency of the drive current that is the output of the inverter circuit 15 is reduced. However, in Embodiment 3, the operating current 6c of the protection device 6a is changed during maintenance. Is different. For this reason, in Embodiment 3, the operating current 6c of the protection device 6a is rewritten to a large value during maintenance.
　保護装置６ａの動作電流６ｃ（及び動作温度６ｃ）は過電流が長時間続く場合に、ファンモーター５ａが故障することを防ぐために設定されていることが多いため、一時的な時間であれば、動作電流６ｃを上げても問題がない場合が多い。室内機１の運転を停止しないでサービスパネル７の取り外しを伴う作業として、フロートスイッチのメンテナンスやＤｉｐＳＷの変更、接点ポートの出力、フィルタ交換などがあるが、いずれの作業も短時間で終わるものである。そこで、例えばサービスパネル７を取り外してから、１０分間は最大許容値を１０％上げるという制御を導入することができる。 The operating current 6c (and operating temperature 6c) of the protection device 6a is often set to prevent the fan motor 5a from failing when an overcurrent continues for a long time. There are many cases where there is no problem even if the operating current 6c is increased. Work that involves removing the service panel 7 without stopping the operation of the indoor unit 1 includes float switch maintenance, DipSW change, contact port output, filter replacement, etc., all of which work in a short time. is there. Therefore, for example, after removing the service panel 7, it is possible to introduce a control for increasing the maximum allowable value by 10% for 10 minutes.
　図９は、本発明の実施形態３における室内機１の制御動作を説明するフローチャートである。以下、図９の各ステップに基づき、図８を参照しつつ説明する。
　（Ｓ３００）
　空気調和装置の運転中にサービスパネル７が取り外されると、センサ８がそれに反応した信号を出力する。
　（Ｓ３０１）
　制御部６ｂは、センサ８からの信号を取り込んで、保護装置６ａの動作電流６ｃを大きな値に書き換える。
　（Ｓ３０２）
　制御部６ｂがセンサ８から信号を取り込んでから、指定時間が経過する。
　（Ｓ３０３）
　保守が終了してサービスパネル７が取り付けられると、センサ８がそれに反応した信号を出力する。
　（Ｓ３０４）
　制御部６ｂは、センサ８からの信号を取り込んで、保護装置６ａの動作電流６ｃを元の値に戻す。 FIG. 9 is a flowchart illustrating the control operation of the indoor unit 1 according to the third embodiment of the present invention. Hereinafter, based on each step of FIG. 9, it demonstrates, referring FIG.
(S300)
When the service panel 7 is removed during the operation of the air conditioner, the sensor 8 outputs a signal in response thereto.
(S301)
The control unit 6b takes in the signal from the sensor 8 and rewrites the operating current 6c of the protection device 6a to a large value.
(S302)
The designated time elapses after the control unit 6b takes in the signal from the sensor 8.
(S303)
When the maintenance is completed and the service panel 7 is attached, the sensor 8 outputs a signal corresponding to the sensor.
(S304)
The control unit 6b takes in the signal from the sensor 8 and returns the operating current 6c of the protection device 6a to the original value.
　以上のように、保護装置６ａが作動する動作電流６ｃを大きな値に書き換えることで、保護装置６ａが作動することなく、運転中にもサービスパネル７の取り付け及び取り外しをすることができる。
　これにより、メンテナンスをする場合にも室内機１の運転を停止させる必要がなくなり、能力に冗長性がなく、室内機１の運転停止ができない場合においてもメンテナンスを実施することができるようになる。例えば、フロートスイッチの点検やＤｉｐＳＷの切り替え、接点入力の切り替え、フィルタ交換など、送風機５の回転に直接関係しないメンテナンスを行う際は室内機１の停止が必要ではなくなる。 As described above, the service panel 7 can be attached and detached even during operation without reactivating the protection device 6a by rewriting the operating current 6c at which the protection device 6a operates to a large value.
As a result, it is not necessary to stop the operation of the indoor unit 1 even when maintenance is performed, and there is no redundancy in capacity, and the maintenance can be performed even when the operation of the indoor unit 1 cannot be stopped. For example, it is not necessary to stop the indoor unit 1 when performing maintenance not directly related to the rotation of the blower 5, such as inspection of the float switch, switching of DipSW, switching of contact input, and filter replacement.
　本実施形態３では、送風機５の駆動電流が動作電流６ｃを超えた場合に、保護装置６ａが作動する制御となっているが、動作電流６ｃに代えて動作温度６ｃを保護装置６ａに設定するようにしてもよい。温度センサ１０ａ（図８参照）によって検知された送風機５のファンモーター５ａの温度が、動作温度６ｃを超えた場合に保護装置６ａが作動する形態も、本発明に含まれる。この場合においても、サービスパネル７が取り外された場合には、動作温度６ｃを上記の例と同様に大きな値に書き換える。 In the third embodiment, the protection device 6a is controlled to operate when the driving current of the blower 5 exceeds the operating current 6c, but the operating temperature 6c is set to the protecting device 6a instead of the operating current 6c. You may do it. A form in which the protective device 6a is activated when the temperature of the fan motor 5a of the blower 5 detected by the temperature sensor 10a (see FIG. 8) exceeds the operating temperature 6c is also included in the present invention. Also in this case, when the service panel 7 is removed, the operating temperature 6c is rewritten to a large value as in the above example.
実施の形態４． Embodiment 4 FIG.
　図１０は本発明の実施の形態４における室内機の制御系を示す概略ブロック図である。上記の実施の形態１～３においてはセンサ８の出力に基づいて保守作業時であることを判断したが、本実施の形態４においては操作部１７にメンテナンスモードを設けて、それが操作されることにより保守作業時であると判断する。 FIG. 10 is a schematic block diagram showing an indoor unit control system according to Embodiment 4 of the present invention. In the first to third embodiments described above, it is determined that the maintenance work is being performed based on the output of the sensor 8, but in the fourth embodiment, the operation unit 17 is provided with a maintenance mode and is operated. Therefore, it is determined that maintenance work is in progress.
　図１１は、本発明の実施形態４における室内機１の制御動作を説明するフローチャートである。以下、図１１の各ステップに基づき、図１０を参照しつつ説明する。 FIG. 11 is a flowchart illustrating the control operation of the indoor unit 1 according to the fourth embodiment of the present invention. Hereinafter, based on each step of FIG. 11, it demonstrates, referring FIG.
　（Ｓ４００）
　電流検知器１０が電流値の上昇を検知し、それに反応した信号を出力する。
　（Ｓ４０１）
　制御部６ｂは、電流検知器１０からの信号を取り込んで、インバーター回路１５に周波数を減少させるための制御信号を出力するとともに、ベーン駆動回路１６にベーン１２を吹出口４を塞ぐ方向へ回転制御させるための制御信号を出力する。
　（Ｓ４０２）
　インバーター回路１５は送風機５の周波数を低下させ、ベーン駆動回路１６はベーン１２を吹出口４を塞ぐ方向へ回転制御させる。
　（Ｓ４０３）
　電流検知器１０は電流値が通常値に戻ることを検知し、それに反応した信号を出力する。
　（Ｓ４０４）
　制御部６ｂは、電流検知器１０からの信号を取り込んで、インバーター回路１５に周波数を減少させるための制御信号を出力するとともに、ベーン駆動回路１６にベーン１２を吹出口４を塞ぐ方向へ回転制御させるための制御信号を出力する。
　（Ｓ４０５）
　　インバーター回路１５は送風機５の周波数を元に戻すとともに、ベーン駆動回路１６はベーン１２の角度を元に戻す方向へ回転制御させる。 (S400)
The current detector 10 detects an increase in the current value and outputs a signal in response thereto.
(S401)
The control unit 6b takes in the signal from the current detector 10 and outputs a control signal for reducing the frequency to the inverter circuit 15, and controls the rotation of the vane 12 in the direction in which the vane 12 is closed in the vane drive circuit 16. The control signal for making it output is output.
(S402)
The inverter circuit 15 lowers the frequency of the blower 5, and the vane drive circuit 16 controls the rotation of the vane 12 in the direction of closing the outlet 4.
(S403)
The current detector 10 detects that the current value returns to the normal value, and outputs a signal in response thereto.
(S404)
The control unit 6b takes in the signal from the current detector 10 and outputs a control signal for reducing the frequency to the inverter circuit 15, and controls the rotation of the vane 12 in the direction in which the vane 12 is closed in the vane drive circuit 16. The control signal for making it output is output.
(S405)
The inverter circuit 15 restores the frequency of the blower 5 and the vane drive circuit 16 controls the rotation of the vane 12 in the direction to restore the angle.
　以上より、保守時に機外圧損が生じた場合にもファンモーター５ａは停止することなく、動き続けることができる。
　なお、本実施形態４では送風機５の周波数及びベーン１２の角度を変える制御を行っているが、いずれか一方の制御を行うようにしても良い。 As described above, even when an external pressure loss occurs during maintenance, the fan motor 5a can continue to move without stopping.
In the fourth embodiment, control for changing the frequency of the blower 5 and the angle of the vane 12 is performed. However, either one of the controls may be performed.
　また、本実施形態４では、送風機５の駆動電流が動作電流６ｃを超えた場合に、保護装置６ａが作動する制御となっているが、動作電流６ｃに代えて動作温度６ｃを保護装置６ａに設定するようにしてもよい。温度センサ１０ａ（図１０参照）によって検知された送風機５のファンモーター５ａの温度が、動作温度６ｃを超えた場合に保護装置６ａが作動する形態も、本発明に含まれる。この場合においても、サービスパネル７が取り外された場合には、動作温度６ｃを上記の例と同様に大きな値に書き換える。 In the fourth embodiment, when the driving current of the blower 5 exceeds the operating current 6c, the protection device 6a is controlled. However, instead of the operating current 6c, the operating temperature 6c is changed to the protecting device 6a. You may make it set. A form in which the protective device 6a is activated when the temperature of the fan motor 5a of the blower 5 detected by the temperature sensor 10a (see FIG. 10) exceeds the operating temperature 6c is also included in the present invention. Also in this case, when the service panel 7 is removed, the operating temperature 6c is rewritten to a large value as in the above example.
　なお、上記実施の形態１～４において、センサと記述しているが、センサとは接触式センサ及びタッチセンサ等の近接式センサなど、サービスパネルの取り外し等を検知できるセンサを指している。また、サービスパネルと記述しているが、サービスパネルとはサービス窓、サービス扉等のメンテナンスをする時に取り外されるパネルも含まれる。 In the first to fourth embodiments, the sensor is described, but the sensor refers to a sensor that can detect removal of the service panel, such as a proximity sensor such as a contact sensor and a touch sensor. In addition, although described as a service panel, the service panel includes a panel that is removed when performing maintenance of a service window, a service door, and the like.
　１　室内機、１ａ　筐体、２　熱交換器、３　吸込口、４　吹出口、５　送風機、５ａ　ファンモーター、６　マイコン、６ａ　保護装置、６ｂ　制御部、６ｃ　動作電流（動作温度）、７　サービスパネル、８　センサ、１０　電流検知器、１０ａ　温度センサ、１２　ベーン、１３　ベーン駆動モーター、１５　インバーター回路、１６　ベーン駆動回路、１７　操作部、２０　制御装置 1 indoor unit, 1a housing, 2 heat exchanger, 3 inlet, 4 outlet, 5 blower, 5a fan motor, 6 microcomputer, 6a protection device, 6b control unit, 6c operating current (operating temperature), 7 service panel , 8 sensor, 10 current detector, 10a temperature sensor, 12 vane, 13 vane drive motor, 15 inverter circuit, 16 vane drive circuit, 17 operation unit, 20 control device

Claims (13)

  1. 　吸込口及び吹出口を有するとともに、保守時に取り外されるサービスパネルを備えた筐体と、
    　前記筐体内に載置された熱交換器と、
    　前記筐体内に設けられ、前記吸込口から空気を吸引し、前記熱交換器を経由して吹出口から空気を排出させる送風機と、
    　前記送風機を制御する制御装置と、
    　前記送風機の駆動を停止して当該送風機を保護する保護装置と、
    を備え、
    　前記制御装置は、
    　前記保守時に、前記保護装置が動作しないようにして、前記送風機の駆動を継続させる、
    　空気調和装置の室内機。     A housing having a suction port and an air outlet and having a service panel to be removed during maintenance,
    A heat exchanger mounted in the housing;
    A blower that is provided in the housing, sucks air from the suction port, and discharges air from the blowout port via the heat exchanger;
    A control device for controlling the blower;
    A protection device for stopping the blower and protecting the blower;
    With
    The controller is
    During the maintenance, the drive of the blower is continued so that the protection device does not operate.
    Air conditioner indoor unit.
  2. 　前記サービスパネルの取り外しを検知するセンサと、
    　前記送風機の駆動電流を検知する電流検知手段と、
    を更に備え、
    　前記制御装置は、
    　前記センサが前記サービスパネルの取り外しを検知すると、前記送風機の駆動電流の周波数を低下させ、前記送風機の駆動電流が前記保護装置の動作電流を超えないようにする、
    　請求項１に記載の空気調和装置の室内機。     A sensor for detecting removal of the service panel;
    Current detection means for detecting the drive current of the blower;
    Further comprising
    The controller is
    When the sensor detects the removal of the service panel, the frequency of the drive current of the blower is decreased so that the drive current of the blower does not exceed the operating current of the protection device.
    The indoor unit of the air conditioning apparatus of Claim 1.
  3. 　前記サービスパネルの取り外しを検知するセンサと、
    　前記送風機の駆動電流を検知する電流検知手段と、
    　前記吹出口に設けられたベーンと、
    　前記ベーンを駆動するベーン駆動モーターと、
    を備え、
    　前記制御装置は、前記センサが前記サービスパネルの取り外しを検知すると、前記ベーン駆動モーターを制御して前記ベーンの角度を前記吹出口を塞ぐ方向に変更させ、前記送風機の駆動電流が前記保護装置の動作電流を超えないようにする、
    　請求項１に記載の空気調和装置の室内機。     A sensor for detecting removal of the service panel;
    Current detection means for detecting the drive current of the blower;
    A vane provided at the air outlet;
    A vane drive motor for driving the vane;
    With
    When the sensor detects removal of the service panel, the control device controls the vane drive motor to change the angle of the vane in a direction to close the outlet, and the drive current of the blower is controlled by the protection device. Do not exceed the operating current,
    The indoor unit of the air conditioning apparatus of Claim 1.
  4. 　前記サービスパネルの取り外しを検知するセンサと、
    　前記送風機の駆動電流を検知する電流検知手段と、
    を更に備え、
    　前記制御装置は、
    　前記センサが前記サービスパネルの取り外しを検知すると、前記保護装置の動作電流の設定値を増加して設定し、前記保護装置が動作しないようにする、
    　請求項１に記載の空気調和装置の室内機。     A sensor for detecting removal of the service panel;
    Current detection means for detecting the drive current of the blower;
    Further comprising
    The controller is
    When the sensor detects removal of the service panel, the setting value of the operating current of the protection device is increased and set so that the protection device does not operate.
    The indoor unit of the air conditioning apparatus of Claim 1.
  5. 　保守モードが設定される操作部と、
    　前記送風機の駆動電流を検知する電流検知手段と、
    を更に備え、
    　前記制御装置は、
    　前記保守モードが設定されると、前記送風機の駆動電流の周波数を低下させ、前記送風機の駆動電流が前記保護装置の動作電流を超えないようにする、
    　請求項１に記載の空気調和装置の室内機。     An operation unit in which the maintenance mode is set;
    Current detection means for detecting the drive current of the blower;
    Further comprising
    The controller is
    When the maintenance mode is set, the frequency of the drive current of the blower is reduced, so that the drive current of the blower does not exceed the operating current of the protection device,
    The indoor unit of the air conditioning apparatus of Claim 1.
  6. 　保守モードが設定される操作部と、
    　前記送風機の駆動電流を検知する電流検知手段と、
    　前記吹出口に設けられたベーンと、
    　前記ベーンを駆動するベーン駆動モーターと、
    を備え、
    　前記制御装置は、前記保守モードが設定されると、前記ベーン駆動モーターを制御して前記ベーンの角度を前記吹出口を塞ぐ方向に変更させ、前記送風機の駆動電流が前記保護装置の動作電流を超えないようにする、
    　請求項１に記載の空気調和装置の室内機。     An operation unit in which the maintenance mode is set;
    Current detection means for detecting the drive current of the blower;
    A vane provided at the air outlet;
    A vane drive motor for driving the vane;
    With
    When the maintenance mode is set, the control device controls the vane drive motor to change the angle of the vane in a direction to close the outlet, and the drive current of the blower changes the operating current of the protection device. Do not exceed,
    The indoor unit of the air conditioning apparatus of Claim 1.
  7. 　保守モードが設定される操作部と、
    　前記送風機の駆動電流を検知する電流検知手段と、
    を更に備え、
    　前記制御装置は、
    　前記保守モードが設定されると、前記保護装置の動作電流の設定値を増加して設定し、前記保護装置が動作しないようにする、
    　請求項１に記載の空気調和装置の室内機。     An operation unit in which the maintenance mode is set;
    Current detection means for detecting the drive current of the blower;
    Further comprising
    The controller is
    When the maintenance mode is set, the set value of the operating current of the protection device is increased and set so that the protection device does not operate.
    The indoor unit of the air conditioning apparatus of Claim 1.
  8. 　前記サービスパネルの取り外しを検知するセンサと、
    　前記送風機のモーターの温度を検知する温度検知手段と、
    を更に備え、
    　前記制御装置は、
    　前記センサが前記サービスパネルの取り外しを検知すると、前記送風機の駆動電流の周波数を低下させ、前記送風機のモーターの温度が前記保護装置の動作温度を超えないようにする、
    　請求項１に記載の空気調和装置の室内機。     A sensor for detecting removal of the service panel;
    Temperature detecting means for detecting the temperature of the motor of the blower;
    Further comprising
    The controller is
    When the sensor detects the removal of the service panel, the frequency of the drive current of the blower is decreased so that the temperature of the motor of the blower does not exceed the operating temperature of the protection device.
    The indoor unit of the air conditioning apparatus of Claim 1.
  9. 　前記サービスパネルの取り外しを検知するセンサと、
    　前記送風機のモーター温度を検知する温度検知手段と、
    　前記吹出口に設けられたベーンと、
    　前記ベーンを駆動するベーン駆動モーターと、
    を備え、
    　前記制御装置は、前記センサが前記サービスパネルの取り外しを検知すると、前記ベーン駆動モーターを制御して前記ベーンの角度を前記吹出口を塞ぐ方向に変更させ、前記送風機のモーターの温度が前記保護装置の動作温度を超えないようにする、
    　請求項１に記載の空気調和装置の室内機。     A sensor for detecting removal of the service panel;
    Temperature detecting means for detecting the motor temperature of the blower;
    A vane provided at the air outlet;
    A vane drive motor for driving the vane;
    With
    When the sensor detects removal of the service panel, the control device controls the vane driving motor to change the angle of the vane in a direction to close the outlet, and the temperature of the blower motor is controlled by the protection device. Do not exceed the operating temperature of the
    The indoor unit of the air conditioning apparatus of Claim 1.
  10. 　前記サービスパネルの取り外しを検知するセンサと、
    　前記送風機のモーターの温度を検知する温度検知手段と、
    を更に備え、
    　前記制御装置は、
    　前記センサが前記サービスパネルの取り外しを検知すると、前記保護装置の動作温度の設定値を増加して設定し、前記保護装置が動作しないようにする、
    　請求項１に記載の空気調和装置の室内機。     A sensor for detecting removal of the service panel;
    Temperature detecting means for detecting the temperature of the motor of the blower;
    Further comprising
    The controller is
    When the sensor detects removal of the service panel, the set value of the operating temperature of the protection device is increased and set, so that the protection device does not operate.
    The indoor unit of the air conditioning apparatus of Claim 1.
  11. 　保守モードが設定される操作部と、
    　前記駆動装置のモーターの温度を検知する温度検知手段と、
    を更に備え、
    　前記制御装置は、
    　前記保守モードが設定されると、前記送風機の駆動電流の周波数を低下させ、前記送風機のモーターの温度が前記保護装置の動作温度を超えないようにする、
    　請求項１に記載の空気調和装置の室内機。     An operation unit in which the maintenance mode is set;
    Temperature detecting means for detecting the temperature of the motor of the driving device;
    Further comprising
    The controller is
    When the maintenance mode is set, the frequency of the drive current of the blower is reduced, so that the temperature of the motor of the blower does not exceed the operating temperature of the protection device,
    The indoor unit of the air conditioning apparatus of Claim 1.
  12. 　保守モードが設定される操作部と、
    　前記送風機のモーターの温度を検知する温度検知手段と、
    　前記吹出口に設けられたベーンと、
    　前記ベーンを駆動するベーン駆動モーターと、
    を備え、
    　前記制御装置は、前記保守モードが設定されると、前記ベーン駆動モーターを制御して前記ベーンの角度を前記吹出口を塞ぐ方向に変更させ、前記送風機のモーターの温度が前記保護装置の動作温度を超えないようにする、
    　請求項１に記載の空気調和装置の室内機。     An operation unit in which the maintenance mode is set;
    Temperature detecting means for detecting the temperature of the motor of the blower;
    A vane provided at the air outlet;
    A vane drive motor for driving the vane;
    With
    When the maintenance mode is set, the control device controls the vane drive motor to change the angle of the vane in a direction to close the outlet, and the temperature of the blower motor is set to the operating temperature of the protection device. Not to exceed
    The indoor unit of the air conditioning apparatus of Claim 1.
  13. 　保守モードが設定される操作部と、
    　前記送風機のモーターの温度を検知する温度検知手段と、
    を更に備え、
    　前記制御装置は、
    　前記保守モードが設定されると、前記保護装置の動作温度の設定値を増加して設定し、前記保護装置が動作しないようにする、
    　請求項１に記載の空気調和装置の室内機。     An operation unit in which the maintenance mode is set;
    Temperature detecting means for detecting the temperature of the motor of the blower;
    Further comprising
    The controller is
    When the maintenance mode is set, the setting value of the operating temperature of the protection device is increased and set so that the protection device does not operate.
    The indoor unit of the air conditioning apparatus of Claim 1.
PCT/JP2014/059984 2014-04-04 2014-04-04 Indoor unit for air conditioning device WO2015151280A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/059984 WO2015151280A1 (en) 2014-04-04 2014-04-04 Indoor unit for air conditioning device

Publications (1)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1151454A (en) * 1997-08-06 1999-02-26 Fujitsu General Ltd Control method of air conditioner
JP2006029687A (en) * 2004-07-16 2006-02-02 Mitsubishi Electric Corp Controller for air conditioner and control display device for air conditioner
JP2008217229A (en) * 2007-03-01 2008-09-18 Daikin Ind Ltd Equipment management device and equipment management system
JP2012122645A (en) * 2010-12-07 2012-06-28 Mitsubishi Electric Corp Air conditioner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1151454A (en) * 1997-08-06 1999-02-26 Fujitsu General Ltd Control method of air conditioner
JP2006029687A (en) * 2004-07-16 2006-02-02 Mitsubishi Electric Corp Controller for air conditioner and control display device for air conditioner
JP2008217229A (en) * 2007-03-01 2008-09-18 Daikin Ind Ltd Equipment management device and equipment management system
JP2012122645A (en) * 2010-12-07 2012-06-28 Mitsubishi Electric Corp Air conditioner

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