JP6853205B2 - Low capacity indoor unit - Google Patents

Low capacity indoor unit Download PDF

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Publication number
JP6853205B2
JP6853205B2 JP2018031021A JP2018031021A JP6853205B2 JP 6853205 B2 JP6853205 B2 JP 6853205B2 JP 2018031021 A JP2018031021 A JP 2018031021A JP 2018031021 A JP2018031021 A JP 2018031021A JP 6853205 B2 JP6853205 B2 JP 6853205B2
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unit
indoor
capacity
low
outdoor
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JP2019143943A (en
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裕記 藤岡
裕記 藤岡
智彦 堤
智彦 堤
勝則 村田
勝則 村田
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Daikin Industries Ltd
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Daikin Industries Ltd
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Priority to JP2018031021A priority Critical patent/JP6853205B2/en
Priority to PCT/JP2019/003197 priority patent/WO2019163451A1/en
Priority to CN201980010681.0A priority patent/CN111656102A/en
Priority to EP19756797.7A priority patent/EP3757471A4/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
    • 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
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031—Sensor arrangements
    • F25B2313/0314—Temperature sensors near the indoor heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031—Sensor arrangements
    • F25B2313/0315—Temperature sensors near the outdoor heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/23—High amount of refrigerant in the system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Description

低能力室内機に関する。 Regarding low-capacity indoor units.

従来、室内の天井に埋め込まれた天吊り型の室内機と、その室内機に接続された室外機とを備えた空気調和機がある(例えば、特開２０１６−１４８５１０号公報(特許文献１)参照)。 Conventionally, there is an air conditioner including a ceiling-mounted indoor unit embedded in the ceiling of an indoor unit and an outdoor unit connected to the indoor unit (for example, Japanese Patent Application Laid-Open No. 2016-148510 (Patent Document 1)). reference).

上記空気調和機において可燃性冷媒を用いている場合、室内機を規定通りの据付高さに据え付けることで国際規格に規定された「冷媒充填量に基づく、適用できる床面積」を満たすようにしている。これによって、万一、室内機から冷媒が漏れても、室内の冷媒濃度が一定以上にならない。 When a flammable refrigerant is used in the above air conditioner, install the indoor unit at the specified installation height so that the "applicable floor area based on the refrigerant filling amount" specified in the international standard is satisfied. There is. As a result, even if the refrigerant leaks from the indoor unit, the concentration of the refrigerant in the room does not exceed a certain level.

特開２０１６−１４８５１０号公報Japanese Unexamined Patent Publication No. 2016-148510

上記従来の空気調和機では、定格冷房能力が２.２ｋＷ以上であるのが一般的であり、定格冷房能力が２.２ｋＷ未満の低能力室内機を洗面所などの床面積が狭い空間に設置する場合は、その低能力室内機から冷媒が漏れて狭い空間に充満すると、冷媒充填量によっては冷媒漏洩時のリスクが高くなるという問題がある。特に、可燃性冷媒(Ｒ３２冷媒などの微燃性冷媒を含む)を用いる場合は、ガス濃度がある程度高くなると、発火などのリスクが高まる。 In the above-mentioned conventional air conditioners, the rated cooling capacity is generally 2.2 kW or more, and a low-capacity indoor unit having a rated cooling capacity of less than 2.2 kW is installed in a space such as a washroom where the floor area is narrow. In this case, if the refrigerant leaks from the low-capacity indoor unit and fills a narrow space, there is a problem that the risk of the refrigerant leak increases depending on the amount of the refrigerant charged. In particular, when a flammable refrigerant (including a slightly flammable refrigerant such as R32 refrigerant) is used, the risk of ignition increases when the gas concentration increases to some extent.

本開示では、冷媒漏洩時のリスクを低減する低能力室内機を提案する。 The present disclosure proposes a low-capacity indoor unit that reduces the risk of refrigerant leakage.

本開示の低能力室内機は、
定格冷房能力が２.２ｋＷ未満であって、
組み合わせが許可された室外機以外の室外機に接続されたときに異常を報知する報知部を備え、
上記組み合わせが許可された室外機のＲ３２冷媒の許容冷媒充填量が、
０．２２７[ｋｇ／ｍ３]×部屋の容積[ｍ ３ ]
以下であり、
上記報知部は、
接続された室外機から通知される該室外機の許容冷媒充填量が、上記定格冷房能力から予め算出された許容冷媒充填量よりも多いとき、異常を報知することを特徴とする。 The low-capacity indoor unit of the present disclosure is
The rated cooling capacity is less than 2.2 kW,
Comprising a notification unit for notifying an abnormality when the combination is connected to the authorized chamber outboard motor than the outdoor unit,
The allowable refrigerant filling amount of the R32 refrigerant of the outdoor unit for which the above combination is permitted is
0.227 [kg / m 3 ] x room volume [m 3 ]
Ri Der below,
The above notification unit
When the allowable refrigerant filling amount of the outdoor unit notified from the connected outdoor unit is larger than the allowable refrigerant filling amount calculated in advance from the rated cooling capacity, an abnormality is notified .

本開示によれば、定格冷房能力が２.２ｋＷ未満であり、組み合わせが許可された室外機以外の室外機に接続されたときに報知部により異常を報知するので、組み合わせが許可された室外機以外の許容冷媒充填量が多い他の室外機が接続されて運転されることがなくなり、冷媒漏洩時のリスクを低減できる。
また、接続された室外機から通知される該室外機の許容冷媒充填量により、組み合わせが許可された室外機か否かを報知部により判断できる。 According to the present disclosure, the rated cooling capacity is less than 2.2kW, so notifies the abnormality by the notification unit when the combination is connected to the authorized chamber outboard motor than the outdoor unit, the combination is permitted outdoor It is possible to reduce the risk of refrigerant leakage because other outdoor units other than the machine, which have a large allowable refrigerant filling amount, are not connected and operated.
Further , the notification unit can determine whether or not the combination is permitted based on the allowable refrigerant filling amount of the outdoor unit notified from the connected outdoor unit.

また、本開示の１つの態様に係る低能力室内機では、
上記定格冷房能力が１.６ｋＷ以下である。 Further, in the low-capacity indoor unit according to one aspect of the present disclosure,
The rated cooling capacity is 1.6 kW or less.

上記実施形態によれば、定格冷房能力が１.６ｋＷ以下であるので、洗面所やキッチンなどの狭い空間の空気調和に適しており、狭い空間における冷媒漏洩時の安全性も高い。 According to the above embodiment, since the rated cooling capacity is 1.6 kW or less, it is suitable for air conditioning in a narrow space such as a washroom or a kitchen, and the safety at the time of refrigerant leakage in a narrow space is high.

また、本開示の１つの態様に係る低能力室内機では、
上記組み合わせが許可された室外機は、複数の室内機が接続可能なマルチ型空気調和機に対応しており、
上記低能力室内機は、上記マルチ型空気調和機の室内機として動作可能であって、上記複数の室内機のうちの少なくとも１つである。 Further, in the low-capacity indoor unit according to one aspect of the present disclosure,
The outdoor units that are allowed to combine the above are compatible with multi-type air conditioners that can connect multiple indoor units.
The low-capacity indoor unit can operate as an indoor unit of the multi-type air conditioner, and is at least one of the plurality of indoor units.

本開示によれば、低能力室内機を少なくとも１つ含む複数の室内機が、組み合わせが許可された室外機に接続されたマルチ型空気調和機を提供できる。 According to the present disclosure, a plurality of indoor units including at least one low-capacity indoor unit can provide a multi-type air conditioner connected to an outdoor unit that is permitted to be combined.

本開示の第１実施形態の低能力室内機を備えたマルチ型空気調和機の構成図である。It is a block diagram of the multi-type air conditioner provided with the low-capacity indoor unit of 1st Embodiment of this disclosure. 上記低能力室内機の斜め下方から見た外観図である。It is an external view seen from diagonally lower side of the said low-capacity indoor unit. 上記低能力室内機の室内制御装置のブロック図である。It is a block diagram of the indoor control device of the said low-capacity indoor unit. 上記室内制御装置の動作を説明するフローチャートである。It is a flowchart explaining operation of the said room control device. 本開示の第２実施形態の低能力室内機の室内制御装置のブロック図である。It is a block diagram of the indoor control device of the low capacity indoor unit of the 2nd Embodiment of this disclosure. 上記室内制御装置の動作を説明するフローチャートである。It is a flowchart explaining operation of the said room control device.

以下、実施形態を説明する。 Hereinafter, embodiments will be described.

〔第１実施形態〕
図１は本開示の第１実施形態の低能力室内機２０Ｃを備えたマルチ型空気調和機の構成図である。 [First Embodiment]
FIG. 1 is a configuration diagram of a multi-type air conditioner including the low-capacity indoor unit 20C according to the first embodiment of the present disclosure.

この第１実施形態のマルチ型空気調和機は、図１に示すように、室内熱交換器４Ａと室内ファン５Ａを有する室内機２０Ａと、室内熱交換器４Ｂと室内ファン５Ｂを有する室内機２０Ｂと、室内熱交換器４Ｃと室内ファン５Ｃを有する低能力室内機２０Ｃと、室内機２０Ａ,２０Ｂおよび低能力室内機２０Ｃに冷媒配管を介して接続された専用室外機１０とを備えている。 As shown in FIG. 1, the multi-type air conditioner of the first embodiment has an indoor unit 20A having an indoor heat exchanger 4A and an indoor fan 5A, and an indoor unit 20B having an indoor heat exchanger 4B and an indoor fan 5B. A low-capacity indoor unit 20C having an indoor heat exchanger 4C and an indoor fan 5C, and a dedicated outdoor unit 10 connected to the indoor units 20A and 20B and the low-capacity indoor unit 20C via a refrigerant pipe are provided.

専用室外機１０は、複数の室内機が接続可能なマルチ型空気調和機に対応しており、低能力室内機２０Ｃは、マルチ型空気調和機の室内機として動作可能である。 The dedicated outdoor unit 10 corresponds to a multi-type air conditioner to which a plurality of indoor units can be connected, and the low-capacity indoor unit 20C can operate as an indoor unit of the multi-type air conditioner.

図１において、１は圧縮機、２は圧縮機１の吐出側に一端が接続された四路切換弁、３は四路切換弁２の他端に一端が接続された室外熱交換器、ＥＶＡ,ＥＶＢ,ＥＶＣは室外熱交換器３の他端に一端が夫々接続された電動膨脹弁、４Ａ,４Ｂ,４Ｃは電動膨脹弁ＥＶＡ,ＥＶＢ,ＥＶＣの他端に一端が夫々接続された室内熱交換器、６は室内熱交換器４Ａ,４Ｂ,４Ｃの他端に四路切換弁２を介して一端が接続され、他端が圧縮機１の吸入側に接続されたアキュムレータである。室内熱交換器４Ａ,４Ｂ,４Ｃ近傍に室内ファン５Ａ,５Ｂ,５Ｃを夫々配置している。 In FIG. 1, 1 is a compressor, 2 is a four-way switching valve having one end connected to the discharge side of the compressor 1, and 3 is an outdoor heat exchanger having one end connected to the other end of the four-way switching valve 2, EVA. , EVB, EVC are electric expansion valves whose ends are connected to the other ends of the outdoor heat exchanger 3, and 4A, 4B, 4C are indoor heats whose ends are connected to the other ends of the electric expansion valves EVA, EVB, EVC, respectively. The exchanger 6 is an accumulator in which one end is connected to the other ends of the indoor heat exchangers 4A, 4B, 4C via a four-way switching valve 2, and the other end is connected to the suction side of the compressor 1. Indoor fans 5A, 5B, 5C are arranged in the vicinity of the indoor heat exchangers 4A, 4B, 4C, respectively.

また、電動膨脹弁ＥＶＡ,ＥＶＢ,ＥＶＣの他端に複数の冷媒配管接続部７Ａ,７Ｂ,７Ｃが接続され、その複数の冷媒配管接続部７Ａ,７Ｂ,７Ｃに連絡配管(冷媒配管)を介して室内熱交換器４Ａ,４Ｂ,４Ｃの一端を夫々接続している。また、室内熱交換器４Ａ,４Ｂ,４Ｃの他端に連絡配管(冷媒配管)を介して複数の冷媒配管接続部８Ａ,８Ｂ,８Ｃが接続されている。 Further, a plurality of refrigerant pipe connection portions 7A, 7B, 7C are connected to the other ends of the electric expansion valves EVA, EVB, EVC, and the plurality of refrigerant pipe connection portions 7A, 7B, 7C are connected via a connecting pipe (refrigerant pipe). One ends of the indoor heat exchangers 4A, 4B, and 4C are connected to each other. Further, a plurality of refrigerant pipe connecting portions 8A, 8B, 8C are connected to the other ends of the indoor heat exchangers 4A, 4B, 4C via a connecting pipe (refrigerant pipe).

上記圧縮機１と四路切換弁２と室外熱交換器３と電動膨脹弁ＥＶＡ,ＥＶＢ,ＥＶＣと室内熱交換器４Ａ,４Ｂ,４Ｃおよびアキュムレータ６で冷媒回路を構成している。この冷媒回路には、微燃性のＲ３２冷媒が充填されている。 The compressor 1, the four-way switching valve 2, the outdoor heat exchanger 3, the electric expansion valves EVA, EVB, EVC, the indoor heat exchangers 4A, 4B, 4C, and the accumulator 6 constitute a refrigerant circuit. This refrigerant circuit is filled with a slightly flammable R32 refrigerant.

また、上記圧縮機１の吐出側に吐出管温度センサ１１を設けている。また、室外熱交換器３に室外熱交換器温度を検出する室外熱交換器温度センサ１２を設けると共に、室外熱交換器３の近傍に室外温度を検出する室外温度センサ１３を設けている。 Further, a discharge pipe temperature sensor 11 is provided on the discharge side of the compressor 1. Further, the outdoor heat exchanger 3 is provided with an outdoor heat exchanger temperature sensor 12 for detecting the outdoor heat exchanger temperature, and an outdoor temperature sensor 13 for detecting the outdoor temperature is provided in the vicinity of the outdoor heat exchanger 3.

また、室内熱交換器４Ａに室内熱交換器温度を検出する室内熱交換器温度センサ１５Ａを設け、室内熱交換器４Ａの近傍に室内温度を検出する室内温度センサ１６Ａを設けている。また、室内熱交換器４Ｂに室内熱交換器温度を検出する室内熱交換器温度センサ１５Ｂを設け、室内熱交換器４Ｂの近傍に室内温度を検出する室内温度センサ１６Ｂを設けている。また、室内熱交換器４Ｃに室内熱交換器温度を検出する室内熱交換器温度センサ１５Ｃを設け、室内熱交換器４Ｃの近傍に室内温度を検出する室内温度センサ１６Ｃを設けている。 Further, the indoor heat exchanger 4A is provided with an indoor heat exchanger temperature sensor 15A for detecting the indoor heat exchanger temperature, and an indoor temperature sensor 16A for detecting the indoor temperature is provided in the vicinity of the indoor heat exchanger 4A. Further, the indoor heat exchanger 4B is provided with an indoor heat exchanger temperature sensor 15B for detecting the indoor heat exchanger temperature, and an indoor temperature sensor 16B for detecting the indoor temperature is provided in the vicinity of the indoor heat exchanger 4B. Further, the indoor heat exchanger 4C is provided with an indoor heat exchanger temperature sensor 15C for detecting the indoor heat exchanger temperature, and an indoor temperature sensor 16C for detecting the indoor temperature is provided in the vicinity of the indoor heat exchanger 4C.

上記専用室外機１０は、マイクロコンピュータと入出力回路などからなる室外制御装置１８を備えている。室外制御装置１８は、圧縮機１と電動膨脹弁ＥＶＡ,ＥＶＢ,ＥＶＣなどを制御する運転制御部１８ａと、通信部１８ｂとを有する。また、室内機２０Ａ,２０Ｂは、図示しない室内制御装置を夫々備えており、低能力室内機２０Ｃは、図２に示す室内制御装置１００を備えている。 The dedicated outdoor unit 10 includes an outdoor control device 18 including a microprocessor and an input / output circuit. The outdoor control device 18 includes a compressor 1, an operation control unit 18a that controls electric expansion valves EVA, EVB, EVC, and the like, and a communication unit 18b. Further, the indoor units 20A and 20B are each provided with an indoor control device (not shown), and the low-capacity indoor unit 20C is provided with the indoor control device 100 shown in FIG.

室内機２０Ａ,２０Ｂの各室内制御装置および低能力室内機２０Ｃの室内制御装置１００は、専用室外機１０の室外制御装置１８と通信線(図示せず)を介して互いに通信を行うことにより、室外制御装置１８と室内機２０Ａ,２０Ｂの室内制御装置および低能力室内機２０Ｃの室内制御装置１００が協調動作することにより、マルチ型空気調和機として動作する。 The indoor control devices 20A and 20B and the indoor control device 100 of the low-capacity indoor unit 20C communicate with each other via a communication line (not shown) with the outdoor control device 18 of the dedicated outdoor unit 10. The outdoor control device 18, the indoor control devices of the indoor units 20A and 20B, and the indoor control device 100 of the low-capacity indoor unit 20C cooperate with each other to operate as a multi-type air conditioner.

上記マルチ型空気調和機において、室内機２０Ａ,２０Ｂおよび低能力室内機２０Ｃで冷房運転を行う場合、四路切換弁２を点線の位置に切り換えて、圧縮機１の運転を開始する。そして、電動膨脹弁ＥＶＡ,ＥＶＢ,ＥＶＣを夫々所定の開度に開く。そして、圧縮機１から吐出した高温高圧のガス冷媒は、室外熱交換器３で室外ファン(図示せず)を運転することにより室外空気との熱交換により凝縮して液冷媒となる。次に、室内熱交換器４Ａ,４Ｂ,４Ｃからの液冷媒は、電動膨脹弁ＥＶＡ,ＥＶＢ,ＥＶＣで減圧された後、室外熱交換器３を運転することにより室内熱交換器４Ａ,４Ｂ,４Ｃで室内空気との熱交換により蒸発してガス冷媒となり、圧縮機１の吸入側に戻る。 In the above-mentioned multi-type air conditioner, when the indoor units 20A and 20B and the low-capacity indoor unit 20C perform the cooling operation, the four-way switching valve 2 is switched to the dotted line position and the operation of the compressor 1 is started. Then, the electric expansion valves EVA, EVB, and EVC are opened to predetermined openings, respectively. Then, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 is condensed by heat exchange with the outdoor air by operating an outdoor fan (not shown) in the outdoor heat exchanger 3 to become a liquid refrigerant. Next, the liquid refrigerant from the indoor heat exchangers 4A, 4B, 4C is depressurized by the electric expansion valves EVA, EVB, EVC, and then the outdoor heat exchanger 3 is operated to operate the indoor heat exchangers 4A, 4B, At 4C, it evaporates by heat exchange with the indoor air to become a gas refrigerant, and returns to the suction side of the compressor 1.

ここで、室内機２０Ａ,２０Ｂの定格冷房能力は２.２ｋＷであり、低能力室内機２０Ｃの定格冷房能力は０.８ｋＷである。すなわち、低能力室内機２０Ｃは、室内機２０Ａ,２０Ｂよりも能力が低い。 Here, the rated cooling capacity of the indoor units 20A and 20B is 2.2 kW, and the rated cooling capacity of the low-capacity indoor unit 20C is 0.8 kW. That is, the low-capacity indoor unit 20C has a lower capacity than the indoor units 20A and 20B.

一方、室内機２０Ａ,２０Ｂおよび低能力室内機２０Ｃで暖房運転を行う場合、四路切換弁２を実線の位置に切り換えて、圧縮機１の運転を開始する。そして、電動膨脹弁ＥＶＡ,ＥＶＢ,ＥＶＣを夫々所定の開度に開く。そして、圧縮機１から吐出した高温高圧のガス冷媒は、室内ファン５Ａ,５Ｂ,５Ｃを運転することにより室内熱交換器４Ａ,４Ｂ,４Ｃで室内空気との熱交換により凝縮して液冷媒となる。次に、室内熱交換器４Ａ,４Ｂ,４Ｃからの液冷媒は、電動膨脹弁ＥＶＡ,ＥＶＢ,ＥＶＣで減圧された後、室外熱交換器３で室外ファン(図示せず)を運転することにより室外空気との熱交換により蒸発してガス冷媒となり、圧縮機１の吸入側に戻る。 On the other hand, when the indoor units 20A and 20B and the low-capacity indoor unit 20C are used for heating operation, the four-way switching valve 2 is switched to the solid line position and the operation of the compressor 1 is started. Then, the electric expansion valves EVA, EVB, and EVC are opened to predetermined openings, respectively. Then, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 is condensed by heat exchange with the indoor air in the indoor heat exchangers 4A, 4B, 4C by operating the indoor fans 5A, 5B, 5C, and becomes a liquid refrigerant. Become. Next, the liquid refrigerant from the indoor heat exchangers 4A, 4B, 4C is depressurized by the electric expansion valves EVA, EVB, EVC, and then the outdoor fan (not shown) is operated by the outdoor heat exchanger 3. It evaporates by heat exchange with the outdoor air to become a gas refrigerant, and returns to the suction side of the compressor 1.

図２は低能力室内機２０Ｃを斜め下方から見た外観図である。この室内機は、天井埋め込み型の室内機である。 FIG. 2 is an external view of the low-capacity indoor unit 20C as viewed from diagonally below. This indoor unit is a ceiling-embedded indoor unit.

この低能力室内機２０Ｃは、図２に示すように、ケーシング本体１０１と、ケーシング本体１０１の下側に取り付けられた矩形状のパネル１０２と、パネル１０２に着脱可能に取り付けられたグリル１０３とを備えている。 As shown in FIG. 2, the low-capacity indoor unit 20C has a casing main body 101, a rectangular panel 102 attached to the lower side of the casing main body 101, and a grill 103 detachably attached to the panel 102. I have.

パネル１０２の長手方向の一方に、パネル１０２の短辺に沿って吹出口１１０を設けている。また、パネル１０２にフラップ１２０を回動可能に取り付けている。図２では、フラップ１２０により吹出口１１０が閉じられた状態を示す。 An outlet 110 is provided along the short side of the panel 102 on one side of the panel 102 in the longitudinal direction. Further, the flap 120 is rotatably attached to the panel 102. FIG. 2 shows a state in which the air outlet 110 is closed by the flap 120.

また、ケーシング本体１０１の側壁から突出するようにドレンソケット１０７を設けている。このドレンソケット１０７に外部からドレンホース(図示せず)を接続する。また、配管接続部１０５,１０６を、ケーシング本体１０１の側壁から突出するように設けている。この配管接続部１０５,１０６に、外部から冷媒配管(図示せず)を接続する。 Further, the drain socket 107 is provided so as to protrude from the side wall of the casing main body 101. A drain hose (not shown) is connected to the drain socket 107 from the outside. Further, the pipe connecting portions 105 and 106 are provided so as to project from the side wall of the casing main body 101. A refrigerant pipe (not shown) is connected to the pipe connection portions 105 and 106 from the outside.

なお、図２において、１０８は電装品部であり、１１１〜１１３は、ケーシング本体１０１から側方に突出するように夫々設けられた吊り金具である。 In FIG. 2, 108 is an electrical component portion, and 111 to 113 are hanging metal fittings provided so as to project laterally from the casing main body 101.

また、図３は低能力室内機２０Ｃの室内制御装置１００のブロック図である。 Further, FIG. 3 is a block diagram of the indoor control device 100 of the low-capacity indoor unit 20C.

上記低能力室内機２０Ｃは、図３に示すように、マイクロコンピュータと入出力回路などからなる室内制御装置１００を備えている。室内制御装置１００は、運転制御部１００ａと、通信部１００ｂと、機種判定部１００ｃと、報知部１００ｄとを有する。 As shown in FIG. 3, the low-capacity indoor unit 20C includes an indoor control device 100 including a microcomputer and an input / output circuit. The indoor control device 100 includes an operation control unit 100a, a communication unit 100b, a model determination unit 100c, and a notification unit 100d.

運転制御部１００ａは、室内温度センサ１６Ｃと室内熱交換器温度センサ１５Ｃの検出信号に基づいて、ファンモータ２１やフラップ駆動部２２を制御する。 The operation control unit 100a controls the fan motor 21 and the flap drive unit 22 based on the detection signals of the indoor temperature sensor 16C and the indoor heat exchanger temperature sensor 15C.

通信部１００ｂは、低能力室内機２０Ｃに接続された専用室外機１０の室外制御装置１８(図１に示す)との通信を通信部１８ｂを介して行う。 The communication unit 100b communicates with the outdoor control device 18 (shown in FIG. 1) of the dedicated outdoor unit 10 connected to the low-capacity indoor unit 20C via the communication unit 18b.

機種判定部１００ｃは、通信部１００ｂにより受信された室外機の機種ＩＤに基づいて、接続された室外機が、低能力室内機２０Ｃとの組み合わせが許可された専用室外機か否かを判定する。 The model determination unit 100c determines whether or not the connected outdoor unit is a dedicated outdoor unit permitted to be combined with the low-capacity indoor unit 20C based on the model ID of the outdoor unit received by the communication unit 100b. ..

報知部１００ｄは、接続された室外機が、上記組み合わせが許可された専用室外機でないと機種判定部１００ｃが判定すると、表示部２３の電源ランプを点滅させて、異常を知らせる。ここで、電源ランプを点滅と同時に、ブザー音を発するようにしてもよい。また、異常を報知する手段は、電源ランプやブザー音に限らず、表示部や音声出力などにより異常を知らせてもよい。 When the model determination unit 100c determines that the connected outdoor unit is not a dedicated outdoor unit for which the above combination is permitted, the notification unit 100d blinks the power lamp of the display unit 23 to notify the abnormality. Here, the buzzer sound may be emitted at the same time as the power lamp blinks. Further, the means for notifying the abnormality is not limited to the power lamp and the buzzer sound, and the abnormality may be notified by a display unit, a voice output, or the like.

図４は室内制御装置１００の動作を説明するフローチャートである。 FIG. 4 is a flowchart illustrating the operation of the indoor control device 100.

まず、低能力室内機２０Ｃに室外機が接続され、電源が最初に投入されたとき、室内制御装置１００の動作がスタートする。 First, when the outdoor unit is connected to the low-capacity indoor unit 20C and the power is first turned on, the operation of the indoor control device 100 starts.

そして、図４に示すステップＳ１で低能力室内機２０Ｃに室外機が接続されたか否かを判定し、低能力室内機２０Ｃに室外機が接続されたと判定すると、ステップＳ２に進む。一方、低能力室内機２０Ｃに室外機が接続されていないときは、ステップＳ１を繰り返す。 Then, in step S1 shown in FIG. 4, it is determined whether or not the outdoor unit is connected to the low-capacity indoor unit 20C, and if it is determined that the outdoor unit is connected to the low-capacity indoor unit 20C, the process proceeds to step S2. On the other hand, when the outdoor unit is not connected to the low-capacity indoor unit 20C, step S1 is repeated.

そして、ステップＳ２で通信部１００ｂにより室外機から機種ＩＤを取得する。 Then, in step S2, the communication unit 100b acquires the model ID from the outdoor unit.

次に、ステップＳ３に進み、室外機から取得された機種ＩＤに基づいて、接続された室外機が、組み合わせが許可された専用室外機か否かを機種判定部１００ｃにより判定する。 Next, the process proceeds to step S3, and the model determination unit 100c determines whether or not the connected outdoor unit is a dedicated outdoor unit for which combination is permitted, based on the model ID acquired from the outdoor unit.

ステップＳ３で専用室外機であると判定すると、ステップＳ４に進む一方、専用室外機でないと判定すると、ステップＳ５に進み、報知部１００ｄにより異常を報知して、処理を終了する。 If it is determined in step S3 that the unit is a dedicated outdoor unit, the process proceeds to step S4, while if it is determined that the unit is not a dedicated outdoor unit, the process proceeds to step S5, the notification unit 100d notifies the abnormality, and the process ends.

そして、ステップＳ４では、通常運転すなわち冷房運転または暖房運転をリモートコントローラなどからの指令に従って行う。 Then, in step S4, the normal operation, that is, the cooling operation or the heating operation is performed according to a command from the remote controller or the like.

上記構成の低能力室内機２０Ｃによれば、定格冷房能力が２.２ｋＷ未満であり、組み合わせが許可された専用室外機１０以外の室外機に接続されたときに報知部１００ｄにより異常を報知する。したがって、専用室外機１０以外の冷媒充填量が多い他の室外機が接続されて運転されることがなくなり、冷媒漏洩時のリスクを低減できる。 According to the low-capacity indoor unit 20C having the above configuration, when the rated cooling capacity is less than 2.2 kW and the combination is connected to an outdoor unit other than the dedicated outdoor unit 10, the notification unit 100d notifies the abnormality. .. Therefore, other than the dedicated outdoor unit 10, other outdoor units having a large amount of refrigerant charged are not connected and operated, and the risk at the time of refrigerant leakage can be reduced.

ここで、専用室外機１０の許容冷媒充填量は、専用室外機１０と、その専用室外機１０に接続された最大数の室内機とで構成されるマルチ型空気調和機において、各室内機が最大配管長で接続されたときに冷媒回路に充填される冷媒充填量である。 Here, the allowable refrigerant filling amount of the dedicated outdoor unit 10 is determined by each indoor unit in the multi-type air conditioner composed of the dedicated outdoor unit 10 and the maximum number of indoor units connected to the dedicated outdoor unit 10. This is the amount of refrigerant charged in the refrigerant circuit when connected with the maximum pipe length.

専用室外機１０の許容冷媒充填量は、１.８ｋｇとしている。この場合、設置箇所が洗面所などを想定して部屋面積３.３ｍ２×天井高さ２.４ｍとしたとき、冷媒漏洩時の最大濃度は、０.２２７ｋｇ／ｍ３(≒１.８ｋｇ／(３.３ｍ２×２.４ｍ))以下となる。 The allowable refrigerant filling amount of the dedicated outdoor unit 10 is 1.8 kg. In this case, assuming that the installation location is a washroom, etc., and the room area is 3.3 m 2 x ceiling height 2.4 m, the maximum concentration at the time of refrigerant leakage is 0.227 kg / m 3 (≈1.8 kg /). (3.3m 2 x 2.4m))

家庭用のマルチ型空気調和機において、許容冷媒充填量は４.０ｋｇとしている。この場合、設置箇所が居室やキッチンなどを想定して部屋面積約７ｍ２×天井高さ２.４ｍとしたとき、冷媒漏洩時の最大濃度を０.２３８ｋｇ／ｍ３(≒４.０ｋｇ／(７ｍ２×２.４ｍ))以下としている。これに対して、洗面所などの狭い空間(３.３ｍ２×２.４ｍ)への冷媒漏洩であっても、低能力室内機２０Ｃを含むマルチ型空気調和機の冷媒漏洩時の最大濃度(０.２２７以下)は小さく、冷媒漏洩に対してより安全である。 In a home-use multi-type air conditioner, the allowable refrigerant filling amount is 4.0 kg. In this case, assuming that the installation location is a living room or kitchen, and the room area is about 7 m 2 x ceiling height 2.4 m, the maximum concentration at the time of refrigerant leakage is 0.238 kg / m 3 (≈4.0 kg / (≈4.0 kg /). 7m 2 x 2.4m)) or less. On the other hand, even if the refrigerant leaks into a narrow space (3.3 m 2 x 2.4 m) such as a washroom, the maximum concentration of the multi-type air conditioner including the low-capacity indoor unit 20C when the refrigerant leaks ( (0.227 or less) is small and safer against refrigerant leaks.

また、低能力室内機２０Ｃの定格冷房能力が１.６ｋＷ(この実施形態では０.８ｋＷ)以下であるので、洗面所などの狭い空間の空気調和に適しており、狭い空間における冷媒漏洩時の安全性も高い。 Further, since the rated cooling capacity of the low-capacity indoor unit 20C is 1.6 kW (0.8 kW in this embodiment) or less, it is suitable for air conditioning in a narrow space such as a washroom, and when a refrigerant leaks in a narrow space. It is also highly safe.

また、低能力室内機２０Ｃを少なくとも１つ含む複数の室内機が専用室外機１０に接続されたマルチ型空気調和機を提供できる。 Further, it is possible to provide a multi-type air conditioner in which a plurality of indoor units including at least one low-capacity indoor unit 20C are connected to the dedicated outdoor unit 10.

上記第１実施形態では、低能力室内機２０Ｃ側に機種判定部１００ｃと報知部１００ｄを備えたが、専用室外機１０側に機種判定部と報知部を備えてもよい。 In the first embodiment, the model determination unit 100c and the notification unit 100d are provided on the low-capacity indoor unit 20C side, but the model determination unit and the notification unit may be provided on the dedicated outdoor unit 10 side.

〔第２実施形態〕
図５は本開示の第２実施形態の低能力室内機２０Ｃの室内制御装置２００のブロック図である。この第２実施形態の低能力室内機２０Ｃは、室内制御装置２００を除いて第１実施形態の低能力室内機２０Ｃと同一の構成をしている。 [Second Embodiment]
FIG. 5 is a block diagram of the indoor control device 200 of the low-capacity indoor unit 20C of the second embodiment of the present disclosure. The low-capacity indoor unit 20C of the second embodiment has the same configuration as the low-capacity indoor unit 20C of the first embodiment except for the indoor control device 200.

この低能力室内機２０Ｃは、図５に示すように、マイクロコンピュータと入出力回路などからなる室内制御装置２００を備えている。室内制御装置２００は、運転制御部２００ａと、通信部２００ｂと、許容冷媒充填量判定部２００ｃと、報知部２００ｄとを有する。 As shown in FIG. 5, the low-capacity indoor unit 20C includes an indoor control device 200 including a microcomputer and an input / output circuit. The indoor control device 200 includes an operation control unit 200a, a communication unit 200b, an allowable refrigerant filling amount determination unit 200c, and a notification unit 200d.

運転制御部２００ａは、室内温度センサ１６Ｃと室内熱交換器温度センサ１５Ｃの検出信号に基づいて、ファンモータ２１やフラップ駆動部２２を制御する。 The operation control unit 200a controls the fan motor 21 and the flap drive unit 22 based on the detection signals of the indoor temperature sensor 16C and the indoor heat exchanger temperature sensor 15C.

通信部２００ｂは、低能力室内機２０Ｃに接続された専用室外機１０の室外制御装置１８(図１に示す)との通信を通信部１８ｂを介して行う。 The communication unit 200b communicates with the outdoor control device 18 (shown in FIG. 1) of the dedicated outdoor unit 10 connected to the low-capacity indoor unit 20C via the communication unit 18b.

許容冷媒充填量判定部２００ｃは、通信部２００ｂにより受信された室外機からの許容冷媒充填量Ｘが、低能力室内機２０Ｃの定格冷房能力０.８ｋＷから予め算出された許容冷媒充填量Ａよりも多いか否かを判定する。 In the allowable refrigerant filling amount determination unit 200c, the allowable refrigerant filling amount X from the outdoor unit received by the communication unit 200b is based on the allowable refrigerant filling amount A calculated in advance from the rated cooling capacity of the low-capacity indoor unit 20C of 0.8 kW. Determine if there are many.

ここで、低能力室内機２０Ｃの定格冷房能力０.８ｋＷから、例えば適用する部屋の床面積(３.３ｍ２)と天井高さ(２.４ｍ)から容積を求め、その容積の室内に冷媒が漏洩したときに、冷媒漏洩時の最大濃度が０.２２７ｋｇ／ｍ３(≒１.８ｋｇ／(３.３ｍ２×２.４ｍ))以下となる許容冷媒充填量Ａを算出しておく。 Here, the volume is obtained from the rated cooling capacity of the low-capacity indoor unit 20C of 0.8 kW, for example, from the floor area (3.3 m 2 ) and ceiling height (2.4 m) of the room to which it is applied, and the refrigerant in the room having that volume is used. Calculate the allowable refrigerant filling amount A so that the maximum concentration at the time of refrigerant leakage is 0.227 kg / m 3 (≈1.8 kg / (3.3 m 2 × 2.4 m)) or less when the refrigerant leaks.

報知部２００ｄは、接続される室外機からの許容冷媒充填量Ｘが、低能力室内機２０Ｃの定格冷房能力から予め算出された許容冷媒充填量Ａよりも多いと許容冷媒充填量判定部２００ｃが判定すると、表示部２３の電源ランプを点滅させて、異常を知らせる。ここで、電源ランプを点滅と同時に、ブザー音を発するようにしてもよい。また、異常を報知する手段は、電源ランプやブザー音に限らず、表示部や音声出力などにより異常を知らせてもよい。 When the permissible refrigerant filling amount X from the connected outdoor unit is larger than the permissible refrigerant filling amount A calculated in advance from the rated cooling capacity of the low-capacity indoor unit 20C, the notification unit 200d tells the permissible refrigerant filling amount determining unit 200c. When the determination is made, the power lamp of the display unit 23 is blinked to notify the abnormality. Here, the buzzer sound may be emitted at the same time as the power lamp blinks. Further, the means for notifying the abnormality is not limited to the power lamp and the buzzer sound, and the abnormality may be notified by a display unit, a voice output, or the like.

図６は、室内制御装置２００の動作を説明するフローチャートである。 FIG. 6 is a flowchart illustrating the operation of the indoor control device 200.

まず、低能力室内機２０Ｃに室外機が接続され、電源が最初に投入されたとき、室内制御装置２００の動作がスタートする。 First, when the outdoor unit is connected to the low-capacity indoor unit 20C and the power is first turned on, the operation of the indoor control device 200 starts.

そして、図６に示すステップＳ１１で低能力室内機２０Ｃに室外機が接続されたか否かを判定し、低能力室内機２０Ｃに室外機が接続されたと判定すると、ステップＳ１２に進む。一方、低能力室内機２０Ｃに室外機が接続されていないときは、ステップＳ１１を繰り返す。 Then, in step S11 shown in FIG. 6, it is determined whether or not the outdoor unit is connected to the low-capacity indoor unit 20C, and if it is determined that the outdoor unit is connected to the low-capacity indoor unit 20C, the process proceeds to step S12. On the other hand, when the outdoor unit is not connected to the low-capacity indoor unit 20C, step S11 is repeated.

そして、ステップＳ１２で通信部２００ｂにより室外機から許容冷媒充填量Ｘを取得する。 Then, in step S12, the communication unit 200b acquires the allowable refrigerant filling amount X from the outdoor unit.

次に、ステップＳ１３に進み、室外機の許容冷媒充填量Ｘが、低能力室内機２０Ｃの定格冷房能力から予め算出された許容冷媒充填量Ａよりも多いか否かを許容冷媒充填量判定部２００ｃにより判定する。 Next, the process proceeds to step S13, and the allowable refrigerant filling amount determination unit determines whether or not the allowable refrigerant filling amount X of the outdoor unit is larger than the allowable refrigerant filling amount A calculated in advance from the rated cooling capacity of the low-capacity indoor unit 20C. Judgment is made by 200c.

ステップＳ１３で許容冷媒充填量Ｘが許容冷媒充填量Ａよりも多いと判定すると、ステップＳ１５に進み、報知部１００ｄにより異常を報知して、処理を終了する。一方、ステップＳ１３で許容冷媒充填量Ｘが許容冷媒充填量Ａ以下であると判定すると、ステップＳ１４に進む。 If it is determined in step S13 that the allowable refrigerant filling amount X is larger than the allowable refrigerant filling amount A, the process proceeds to step S15, the notification unit 100d notifies the abnormality, and the process ends. On the other hand, if it is determined in step S13 that the allowable refrigerant filling amount X is equal to or less than the allowable refrigerant filling amount A, the process proceeds to step S14.

そして、ステップＳ１４では、通常運転すなわち冷房運転または暖房運転をリモートコントローラなどからの指令に従って行う。 Then, in step S14, the normal operation, that is, the cooling operation or the heating operation is performed according to a command from the remote controller or the like.

上記構成の低能力室内機２０Ｃによれば、専用室外機１０の許容冷媒充填量Ｘを、低能力室内機２０Ｃの定格冷房能力から予め算出された許容冷媒充填量Ａよりも小さく設定することによって、低能力室内機２０Ｃが専用室外機１０に接続されたとき、報知部２００ｄは、異常を報知しない。これに対して、専用室外機１０以外の室外機が接続されたとき、通知される該室外機の許容冷媒充填量Ｘが、上記定格冷房能力から予め算出された許容冷媒充填量Ａよりも多いので、報知部２００ｄにより異常を報知する。 According to the low-capacity indoor unit 20C having the above configuration, the allowable refrigerant filling amount X of the dedicated outdoor unit 10 is set to be smaller than the allowable refrigerant filling amount A calculated in advance from the rated cooling capacity of the low-capacity indoor unit 20C. When the low-capacity indoor unit 20C is connected to the dedicated outdoor unit 10, the notification unit 200d does not notify the abnormality. On the other hand, when an outdoor unit other than the dedicated outdoor unit 10 is connected, the permissible refrigerant filling amount X of the outdoor unit notified is larger than the permissible refrigerant filling amount A calculated in advance from the rated cooling capacity. Therefore, the notification unit 200d notifies the abnormality.

上記第２実施形態では、低能力室内機２０Ｃ側に許容冷媒充填量判定部２００ｃを備えたが、専用室外機１０側に許容冷媒充填量判定部を備えてもよい。 In the second embodiment, the allowable refrigerant filling amount determination unit 200c is provided on the low-capacity indoor unit 20C side, but the allowable refrigerant filling amount determination unit may be provided on the dedicated outdoor unit 10 side.

上記第１,第２実施形態では、室外機から取得された機種ＩＤに基づいて、接続された室外機が専用室外機１０か否かを判定したり、室外機からの許容冷媒充填量Ｘが、低能力室内機２０Ｃの定格冷房能力から予め算出された許容冷媒充填量Ａよりも多いか否かを判定したりしたが、接続された室外機が、組み合わせが許可された専用室外機か否かを判定する手段は、これらに限らない。 In the first and second embodiments, it is determined whether or not the connected outdoor unit is the dedicated outdoor unit 10 based on the model ID acquired from the outdoor unit, and the allowable refrigerant filling amount X from the outdoor unit is determined. , It was judged whether or not it was larger than the allowable refrigerant filling amount A calculated in advance from the rated cooling capacity of the low-capacity indoor unit 20C, but whether or not the connected outdoor unit was a dedicated outdoor unit that was allowed to be combined. The means for determining whether or not is not limited to these.

また、上記第１,第２実施形態では、専用室外機１０と、その専用室外機１０に接続された複数の室内機(低能力室内機２０Ｃを含む)とを備えたマルチ型空気調和機について説明したが、専用室外機と低能力室内機とが一対一で接続された空気調和機であってもよい。 Further, in the first and second embodiments, the multi-type air conditioner including the dedicated outdoor unit 10 and a plurality of indoor units (including the low-capacity indoor unit 20C) connected to the dedicated outdoor unit 10 is provided. As described above, it may be an air conditioner in which a dedicated outdoor unit and a low-capacity indoor unit are connected one-to-one.

本開示の具体的な実施の形態について説明したが、本開示は上記第１,第２実施形態に限定されるものではなく、本開示の範囲内で種々変更して実施することができる。 Although the specific embodiments of the present disclosure have been described, the present disclosure is not limited to the first and second embodiments described above, and various modifications can be made within the scope of the present disclosure.

１…圧縮機
２…四路切換弁
３…室外熱交換器
４Ａ,４Ｂ,４Ｃ…室内熱交換器
５Ａ,５Ｂ,５Ｃ…室内ファン
６…アキュムレータ
７Ａ,７Ｂ,７Ｃ…冷媒配管接続部
８Ａ,８Ｂ,８Ｃ…冷媒配管接続部
１０…専用室外機
１１…吐出管温度センサ
１２…室外熱交換器温度センサ
１３…室外温度センサ
１５Ａ,１５Ｂ,１５Ｃ…室内熱交換器温度センサ
１６Ａ,１６Ｂ,１６Ｃ…室内温度センサ
１８…室外制御装置
１８ａ…運転制御部
１８ｂ…通信部
２０Ａ,２０Ｂ…室内機
２０Ｃ…低能力室内機
１００…室内制御装置
１００ａ…運転制御部
１００ｂ…通信部
１００ｃ…機種判定部
１００ｄ…報知部
２００…室内制御装置
２００ａ…運転制御部
２００ｂ…通信部
２００ｃ…許容冷媒充填量判定部
２００ｄ…報知部
ＥＶＡ,ＥＶＢ,ＥＶＣ…電動膨脹弁 1 ... Compressor 2 ... Four-way switching valve 3 ... Outdoor heat exchanger 4A, 4B, 4C ... Indoor heat exchanger 5A, 5B, 5C ... Indoor fan 6 ... Accumulator 7A, 7B, 7C ... Refrigerant pipe connection 8A, 8B , 8C ... Refrigerant pipe connection 10 ... Dedicated outdoor unit 11 ... Discharge pipe temperature sensor 12 ... Outdoor heat exchanger temperature sensor 13 ... Outdoor temperature sensor 15A, 15B, 15C ... Indoor heat exchanger temperature sensor 16A, 16B, 16C ... Indoor Temperature sensor 18 ... Outdoor control device 18a ... Operation control unit 18b ... Communication unit 20A, 20B ... Indoor unit 20C ... Low capacity indoor unit 100 ... Indoor control device 100a ... Operation control unit 100b ... Communication unit 100c ... Model determination unit 100d ... Notification Unit 200 ... Indoor control device 200a ... Operation control unit 200b ... Communication unit 200c ... Allowable refrigerant filling amount determination unit 200d ... Notification unit EVA, EVB, EVC ... Electric expansion valve

Claims (3)

定格冷房能力が２.２ｋＷ未満であって、
組み合わせが許可された室外機以外の室外機に接続されたときに異常を報知する報知部を備え、
上記組み合わせが許可された室外機のＲ３２冷媒の許容冷媒充填量が、
０．２２７[ｋｇ／ｍ３]×部屋の容積[ｍ ３ ]
以下であり、
上記報知部は、
接続された室外機から通知される該室外機の許容冷媒充填量が、上記定格冷房能力から予め算出された許容冷媒充填量よりも多いとき、異常を報知することを特徴とする低能力室内機。 The rated cooling capacity is less than 2.2 kW,
Comprising a notification unit for notifying an abnormality when the combination is connected to the authorized chamber outboard motor than the outdoor unit,
The allowable refrigerant filling amount of the R32 refrigerant of the outdoor unit for which the above combination is permitted is
0.227 [kg / m 3 ] x room volume [m 3 ]
Ri Der below,
The above notification unit
A low-capacity indoor unit characterized in that an abnormality is notified when the allowable refrigerant filling amount of the outdoor unit notified from the connected outdoor unit is larger than the allowable refrigerant filling amount calculated in advance from the rated cooling capacity. .. 請求項１に記載の低能力室内機において、
上記定格冷房能力が１.６ｋＷ以下であることを特徴とする低能力室内機。 In the low-capacity indoor unit according to claim 1,
A low-capacity indoor unit characterized in that the rated cooling capacity is 1.6 kW or less. 請求項１または２に記載の低能力室内機において、
上記組み合わせが許可された室外機は、複数の室内機が接続可能なマルチ型空気調和機に対応しており、
上記低能力室内機は、上記マルチ型空気調和機の室内機として動作可能であって、上記複数の室内機のうちの少なくとも１つであることを特徴とする低能力室内機。 In the low-capacity indoor unit according to claim 1 or 2.
The outdoor units that are allowed to combine the above are compatible with multi-type air conditioners that can connect multiple indoor units.
The low-capacity indoor unit is capable of operating as an indoor unit of the multi-type air conditioner, and is at least one of the plurality of indoor units.
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