JP2010210164A

JP2010210164A - Method of controlling operation of multi-chamber type air conditioner

Info

Publication number: JP2010210164A
Application number: JP2009057695A
Authority: JP
Inventors: Hiroyuki Takeuchi; 裕幸武内
Original assignee: Panasonic Corp
Current assignee: Panasonic Corp
Priority date: 2009-03-11
Filing date: 2009-03-11
Publication date: 2010-09-24

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of controlling an operation of a multi-chamber type air conditioner, securing refrigerant circulation amount during a refrigerating cycle and properly performing the operation without deficiency in performance. <P>SOLUTION: This method controls the multi-chamber type air conditioner composed of a plurality of indoor units (not shown) connected with an outdoor unit (not shown) provided with a compressor 1 and an outdoor heat exchanger 5, and having a receiver 9 disposed in an outlet of the outdoor heat exchanger 5 and connected through a compressor discharge pipe 1a and a receiver bypass valve 11. A discharge gas bypass valve 10 is disposed in a state of bypassing an inlet and an outlet of the receiver 9, and the discharge gas bypass valve 10 and the receiver bypass valve 11 are simultaneously opened when the number of operation of the connected indoor units is over a set value in starting a cooling operation in the state where a compressor operational frequency is a set value or more, and an outside air temperature is low, thus the accumulation of liquid refrigerant due to increase of pressure in the receiver 9 is prevented, and the refrigerant circulation amount during the refrigerating cycle is secured. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、多室形空気調和機の運転制御方法に関するものである。 The present invention relates to an operation control method for a multi-room air conditioner.

従来この種の多室形空気調和機の運転制御方法を図１７に基づいて説明する。図１７は従来の多室形空気調和機の冷凍サイクル図で、レシーバ９は、室外熱交換器５の出口の膨張弁８の下流側に接続されている。ここで冷房運転時に、室外熱交換器５から出た液冷媒は、一旦レシーバ９内に溜まり、レシーバ９を出た後は、室内熱交換器２０側へ循環される。接続配管が短く、また接続される室内機の台数が少ない場合は、冷媒は、余剰冷媒としてレシーバ９内に溜めて、冷凍サイクル内を最適な冷媒循環量に調節し冷暖房能力を発揮することができるようになっている（例えば、特許文献１参照）。
特許第３９４０２５３号公報 A conventional operation control method for this type of multi-room air conditioner will be described with reference to FIG. FIG. 17 is a refrigeration cycle diagram of a conventional multi-room air conditioner. A receiver 9 is connected to the downstream side of the expansion valve 8 at the outlet of the outdoor heat exchanger 5. Here, during the cooling operation, the liquid refrigerant discharged from the outdoor heat exchanger 5 is temporarily accumulated in the receiver 9 and is circulated to the indoor heat exchanger 20 side after leaving the receiver 9. When the connecting pipe is short and the number of connected indoor units is small, the refrigerant can be stored in the receiver 9 as surplus refrigerant, and the inside of the refrigeration cycle can be adjusted to the optimum refrigerant circulation amount to exert the air conditioning capability. (For example, refer patent document 1).
Japanese Patent No. 3940253

しかしながら、上記従来の多室形空気調和機の運転制御方法では、接続配管が長くかつ接続される室内機の台数が多い場合は、多くの冷媒循環量が必要とされているにも拘らず、特に、室外熱交換器５の出口において、冷媒の過冷却が取れやすい冷房低外気温条件ではレシーバ９内に冷媒が溜まってしまうため、冷媒循環量が不足し、その結果、冷房能力が不足してユーザーに不快感を与えてしまうという課題があった。 However, in the above-described conventional multi-room air conditioner operation control method, when the connecting pipe is long and the number of connected indoor units is large, a large amount of refrigerant circulation is required, In particular, at the outlet of the outdoor heat exchanger 5, the refrigerant accumulates in the receiver 9 under the cooling low outside air temperature condition in which the refrigerant can be easily supercooled, so that the refrigerant circulation amount is insufficient, and as a result, the cooling capacity is insufficient. There is a problem that the user feels uncomfortable.

本発明は、前記従来の課題を解決するもので、熱交換器出口において冷媒の過冷却が取れやすい低外気温条件でもレシーバ内に圧縮機吐出ガスを導入することによって液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することが可能となるため、能力不足状態になることなく適正な運転が可能となる多室形空気調和機の運転制御方法を提供することを目的とする。 The present invention solves the above-described conventional problems, and prevents liquid refrigerant from accumulating by introducing the compressor discharge gas into the receiver even under a low outside air temperature condition where the refrigerant can be supercooled easily at the outlet of the heat exchanger. An object of the present invention is to provide an operation control method for a multi-chamber air conditioner that enables proper operation without being in a state of insufficient capacity because it is possible to ensure the amount of refrigerant circulation in the refrigeration cycle. .

前記従来の課題を解決するために、本発明の多室形空気調和機の運転制御方法は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ低外気温時、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパスし、しかも圧縮機からの吐出ガスがレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 In order to solve the above-described conventional problems, an operation control method for a multi-room air conditioner according to the present invention includes an outdoor unit in which a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, and a pressure reducing device are disposed. It is composed of a plurality of indoor units connected to the outdoor unit, and includes a receiver disposed at the outlet of the outdoor heat exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve. In the operation control method for a multi-chamber air conditioner, a second electromagnetic two-way valve that bypasses the inlet and outlet of the receiver is provided, and at the start of cooling operation, the compressor operating frequency is equal to or higher than a set value, and the low outside temperature When the number of operating indoor units connected exceeds a set value, the second electromagnetic two-way valve is opened simultaneously with the opening of the first electromagnetic two-way valve. The discharge gas from the compressor is introduced into the receiver. In Rukoto, the becomes a high-pressure atmosphere receiver, prevents from accumulating liquid refrigerant, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

また、本発明の多室形空気調和機の運転制御方法は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ吐出圧力が設定値以下のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパスし、しかも圧縮機からの吐出ガス
がレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 The operation control method for a multi-room air conditioner according to the present invention includes a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of the outdoor units connected to the outdoor unit. Operation of a multi-room air conditioner comprising a single indoor unit and provided with a receiver disposed at the outlet of the outdoor heat exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve In the control method, a second electromagnetic two-way valve that bypasses the inlet and outlet of the receiver is provided, and is connected when the cooling operation starts and when the compressor operating frequency is equal to or higher than the set value and the discharge pressure is equal to or lower than the set value. When the number of operating indoor units exceeds a set value, the second electromagnetic two-way valve is opened simultaneously with the opening of the first electromagnetic two-way valve, bypassing the receiver inlet and outlet pipes, Moreover, the discharge gas from the compressor is introduced into the receiver. The receiver is a high-pressure atmosphere, preventing from accumulating liquid refrigerant, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

また、本発明の多室形空気調和機の運転制御方法は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ室外凝縮温度が設定値以下のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパスし、しかも圧縮機からの吐出ガスがレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 The operation control method for a multi-room air conditioner according to the present invention includes a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of the outdoor units connected to the outdoor unit. Operation of a multi-room air conditioner comprising a single indoor unit and provided with a receiver disposed at the outlet of the outdoor heat exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve In the control method, a second electromagnetic two-way valve that bypasses the inlet and outlet of the receiver is provided and connected when the cooling operation starts and the compressor operating frequency is equal to or higher than the set value and the outdoor condensation temperature is equal to or lower than the set value. When the number of operated indoor units exceeds the set value, the second electromagnetic two-way valve is opened simultaneously with the opening of the first electromagnetic two-way valve, bypassing the receiver inlet and outlet pipes. In addition, the discharge gas from the compressor is introduced into the receiver. In, the receiver is a high-pressure atmosphere, it prevents the liquid refrigerant accumulates, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

また、本発明の多室形空気調和機の運転制御方法は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ前記室内機に設けた室内熱交換器の出口温度が設定値以上のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパスし、しかも圧縮機からの吐出ガスがレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 The operation control method for a multi-room air conditioner according to the present invention includes a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of the outdoor units connected to the outdoor unit. Operation of a multi-room air conditioner comprising a single indoor unit and provided with a receiver disposed at the outlet of the outdoor heat exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve In the control method, there is provided a second electromagnetic two-way valve that bypasses the inlet and outlet of the receiver, the compressor operating frequency is equal to or higher than a set value at the start of cooling operation, and the indoor heat exchanger provided in the indoor unit When the outlet temperature is equal to or higher than a set value, and the number of connected indoor units exceeds the set value, the second electromagnetic two-way valve is opened simultaneously with the opening of the first electromagnetic two-way valve. Bypass the receiver inlet and outlet pipes and discharge from the compressor Scan By is introduced into the receiver, the receiver becomes a high-pressure atmosphere, preventing from accumulating liquid refrigerant, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

また、本発明の多室形空気調和機の運転制御方法は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ前記室内機に設けた室内膨張弁の開度が設定値以上のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパスし、しかも圧縮機からの吐出ガスがレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 The operation control method for a multi-room air conditioner according to the present invention includes a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of the outdoor units connected to the outdoor unit. Operation of a multi-room air conditioner comprising a single indoor unit and provided with a receiver disposed at the outlet of the outdoor heat exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve In the control method, a second electromagnetic two-way valve that bypasses the inlet and outlet of the receiver is provided, and the opening of the indoor expansion valve provided in the indoor unit at the start of cooling operation and at a compressor operating frequency that is equal to or higher than a set value. When the degree is equal to or greater than a set value, when the number of connected indoor units exceeds the set value, the second electromagnetic two-way valve is opened simultaneously with the opening of the first electromagnetic two-way valve. Bypass the inlet and outlet pipes of the receiver and discharge gas from the compressor By being introduced into the receiver, the receiver becomes a high-pressure atmosphere, preventing from accumulating liquid refrigerant, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

本発明の多室形空気調和機の運転制御方法は、冷房運転時、レシーバ内に液冷媒が溜まるのを防ぎ冷媒循環量を確保することで冷房能力の低下を防ぐことができる。 The operation control method for a multi-room air conditioner according to the present invention can prevent the cooling capacity from being lowered by preventing the liquid refrigerant from accumulating in the receiver during the cooling operation and securing the refrigerant circulation amount.

第１の発明は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ低外気温時、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパス
し、しかも圧縮機からの吐出ガスがレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 The first invention is composed of a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of indoor units connected to the outdoor unit, and the outdoor heat In an operation control method of a multi-chamber air conditioner provided with a receiver disposed at an outlet of an exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve, an inlet and an outlet of the receiver are connected to each other. By providing a second electromagnetic two-way valve to bypass, when the cooling operation is started and the compressor operating frequency is equal to or higher than a set value and the low outside temperature, the number of connected indoor units exceeds the set value, Simultaneously with the opening of the second electromagnetic two-way valve, the first electromagnetic two-way valve is opened. By bypassing the inlet and outlet pipes of the receiver, the discharge gas from the compressor is introduced into the receiver. , The atmosphere inside the receiver becomes a high-pressure atmosphere, and liquid refrigerant accumulates Prevent, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

第２の発明は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ吐出圧力が設定値以下のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパスし、しかも圧縮機からの吐出ガスがレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 The second invention is composed of a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of indoor units connected to the outdoor unit, and the outdoor heat In an operation control method of a multi-chamber air conditioner provided with a receiver disposed at an outlet of an exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve, an inlet and an outlet of the receiver are connected to each other. A second electromagnetic two-way valve for bypassing is provided, and when the cooling operation is started and the compressor operating frequency is equal to or higher than the set value and the discharge pressure is equal to or lower than the set value, the number of connected indoor units operated is set to the set value. If exceeded, the second electromagnetic two-way valve opens and at the same time the first electromagnetic two-way valve opens, bypassing the inlet and outlet pipes of the receiver, and the discharge gas from the compressor is introduced into the receiver As a result, the atmosphere inside the receiver becomes high pressure, Preventing refrigerant from accumulating, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

第３の発明は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ室外凝縮温度が設定値以下のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパスし、しかも圧縮機からの吐出ガスがレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 A third invention is composed of an outdoor unit having a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, and a pressure reducing device, and a plurality of indoor units connected to the outdoor unit, and the outdoor heat In an operation control method of a multi-chamber air conditioner provided with a receiver disposed at an outlet of an exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve, an inlet and an outlet of the receiver are connected to each other. A bypassed second electromagnetic two-way valve is provided, and when the cooling operation starts and the compressor operating frequency is equal to or higher than the set value and the outdoor condensing temperature is equal to or lower than the set value, the number of operating indoor units connected is the set value. Exceeds the above, the second electromagnetic two-way valve opens and at the same time the first electromagnetic two-way valve opens, bypassing the receiver inlet and outlet pipes, and the discharge gas from the compressor to the receiver As a result, the receiver has a high-pressure atmosphere. Prevents the liquid refrigerant accumulates, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

第４の発明は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ前記室内機に設けた室内熱交換器の出口温度が設定値以上のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパスし、しかも圧縮機からの吐出ガスがレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 4th invention is comprised from the outdoor unit which arrange | positioned the capacity variable type compressor, the outdoor air blower, the outdoor heat exchanger, and the pressure reduction device, and the plurality of indoor units connected to the outdoor unit, and the outdoor heat In an operation control method of a multi-chamber air conditioner provided with a receiver disposed at an outlet of an exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve, an inlet and an outlet of the receiver are connected to each other. A second electromagnetic two-way valve that bypasses is provided, and is connected when the cooling operation starts, when the compressor operating frequency is equal to or higher than the set value, and the outlet temperature of the indoor heat exchanger provided in the indoor unit is equal to or higher than the set value. When the number of operating indoor units exceeds a set value, the second electromagnetic two-way valve is opened simultaneously with the opening of the first electromagnetic two-way valve, bypassing the receiver inlet and outlet pipes, Moreover, the discharge gas from the compressor is introduced into the receiver, The receiver is a high-pressure atmosphere, preventing from accumulating liquid refrigerant, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

第５の発明は、能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ前記室内機に設けた室内膨張弁の開度が設定値以上のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くもので、レシーバの入口と出口管をバイパスし、しかも圧縮機からの吐出ガスがレシーバへ導入されることで、レシーバ内が高圧の雰囲気となり、液冷媒が溜まるのを防ぎ、冷凍サイクル中の冷媒循環量を確保することができる。 A fifth invention is composed of a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of indoor units connected to the outdoor unit, and the outdoor heat In an operation control method of a multi-chamber air conditioner provided with a receiver disposed at an outlet of an exchanger and connected via a compressor discharge pipe and a first electromagnetic two-way valve, an inlet and an outlet of the receiver are connected to each other. A second electromagnetic two-way valve that bypasses is provided, and is connected when the cooling operation starts and when the compressor operating frequency is equal to or higher than the set value and the opening of the indoor expansion valve provided in the indoor unit is equal to or higher than the set value. When the number of operating indoor units exceeds the set value, the second electromagnetic two-way valve is opened simultaneously with the opening of the first electromagnetic two-way valve, bypassing the receiver inlet and outlet pipes, As the discharge gas from the compressor is introduced into the receiver, Inner becomes a high-pressure atmosphere, preventing from accumulating liquid refrigerant, it is possible to secure the refrigerant circulation amount in the refrigeration cycle.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
本発明の第１の実施の形態における多室形空調機の運転制御方法について図１〜４を用いて説明する。図１は、本実施の形態における多室形空気調和機の運転制御方法を用いた多室形空気調和機の冷凍サイクル図、図２は、同多室形空調機の運転制御方法を示す制御ブロック図である。 (Embodiment 1)
An operation control method for a multi-room air conditioner according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a refrigeration cycle diagram of a multi-room air conditioner using the multi-room air conditioner operation control method according to the present embodiment, and FIG. 2 is a control showing the multi-room air conditioner operation control method. It is a block diagram.

図１において、本実施の形態における多室形空調機は、１台の室外機（図示せず）と、前記室外機に接続された複数の室内機（図示せず）から構成され、それぞれ、能力可変型の圧縮機１と、クランクケースヒータ２と、４方弁３と、オイルセパレータ４と、室外熱交換器５と、室外送風機６と、外気温度センサー７と、減圧装置としての膨張弁８と、レシーバ９と、第１の電磁２方弁であるレシーババイパス弁１１と、室内膨張弁１２と、室内熱交換器１３と、室内送風機１４と、室内配管温度センサー１５と、室内吸込み温度センサー１６を備えている。 In FIG. 1, the multi-room air conditioner in the present embodiment is composed of one outdoor unit (not shown) and a plurality of indoor units (not shown) connected to the outdoor unit, Variable capacity compressor 1, crankcase heater 2, four-way valve 3, oil separator 4, outdoor heat exchanger 5, outdoor blower 6, outdoor temperature sensor 7, and expansion valve as a pressure reducing device 8, a receiver 9, a receiver bypass valve 11 that is a first electromagnetic two-way valve, an indoor expansion valve 12, an indoor heat exchanger 13, an indoor blower 14, an indoor piping temperature sensor 15, and an indoor suction temperature. A sensor 16 is provided.

レシーバ９は、室外熱交換器５の出口側で膨張弁８の下流側に、吐出ガスバイパス弁１０及び入口出口バイパス管１０ａを介して接続されている。入口出口バイパス管１０ａの途中には、レシーバ９の入口と出口をバイパスする第２の電磁２方弁である吐出ガスバイパス弁１０が設けられている。 The receiver 9 is connected to the outlet side of the outdoor heat exchanger 5 and to the downstream side of the expansion valve 8 via a discharge gas bypass valve 10 and an inlet / outlet bypass pipe 10a. A discharge gas bypass valve 10 that is a second electromagnetic two-way valve that bypasses the inlet and outlet of the receiver 9 is provided in the middle of the inlet / outlet bypass pipe 10a.

図２において、３１は、冷房、暖房その他の運転モードを検出する運転モード検出装置、３２は、圧縮機運転周波数検出装置、３４は、外気温度センサー７で検出された外気温を記憶する外気温記憶装置、３５は、室内機接続運転台数検出装置、３６は、室内機接続運転台数記憶装置、３７は、圧縮機吐出ガスバイパス弁駆動装置、３８は、レシーバ入出口管バイパス弁駆動装置である。 In FIG. 2, 31 is an operation mode detection device that detects cooling, heating, and other operation modes, 32 is a compressor operation frequency detection device, and 34 is an outside air temperature that stores the outside air temperature detected by the outside air temperature sensor 7. The storage device 35 is an indoor unit connection operation number detection device, 36 is an indoor unit connection operation number storage device, 37 is a compressor discharge gas bypass valve drive device, and 38 is a receiver inlet / outlet pipe bypass valve drive device. .

以下この制御ブロック図に基づいて、本実施の形態における多室形空気調和機の運転制御方法を、図３のフローチャート及び図４のタイムチャートを用いて説明する。 Hereinafter, based on this control block diagram, the operation control method of the multi-room air conditioner in the present embodiment will be described with reference to the flowchart of FIG. 3 and the time chart of FIG.

冷房運転時でしかも起動制御中は、圧縮機周波数はＨｚ１で運転している。起動制御終了後、圧縮機運転周波数は、設定周波数Ｈｚ２まで上昇し、このとき接続運転室内機台数が設定値Ｉｎ１を超えている。しかも、外気温が設定値ＴＯ１を下回っているため、吐出ガスバイパス弁１０及びレシーババイパス弁１１が開く。 During cooling operation and during start-up control, the compressor frequency is operating at Hz1. After the start control is finished, the compressor operating frequency rises to the set frequency Hz2, and at this time, the number of connected operation indoor units exceeds the set value In1. Moreover, since the outside air temperature is lower than the set value TO1, the discharge gas bypass valve 10 and the receiver bypass valve 11 are opened.

これは、外気温が低いと室外熱交換器５の出口の冷媒の過冷却度が取れ、レシーバ９内は満液であると推定されるにも拘らず、圧縮機運転周波数が高く、しかも室内機運転台数が多いので、冷凍サイクル中を循環する冷媒量が不足していると判断し、吐出ガスをレシーバ９内へ導入して高圧の雰囲気とし、レシーバ９内に溜まっている液冷媒を追い出すことができる。また同時に、レシーババイパス弁１１が開くので、室外熱交換器５から吐出された液冷媒は、レシーバ９内に溜まることなく冷凍サイクル中へ循環する。これらにより冷凍サイクル中の冷媒循環量を増加させ、冷房能力を最大限に発揮する。 This is because when the outside air temperature is low, the refrigerant at the outlet of the outdoor heat exchanger 5 can be supercooled and the receiver 9 is presumed to be full, but the compressor operating frequency is high, and the indoor Since the number of operating machines is large, it is determined that the amount of refrigerant circulating in the refrigeration cycle is insufficient, the discharge gas is introduced into the receiver 9 to create a high-pressure atmosphere, and the liquid refrigerant accumulated in the receiver 9 is driven out. be able to. At the same time, since the receiver bypass valve 11 is opened, the liquid refrigerant discharged from the outdoor heat exchanger 5 circulates into the refrigeration cycle without accumulating in the receiver 9. These increase the amount of refrigerant circulating in the refrigeration cycle and maximize the cooling capacity.

（実施の形態２）
図５は、本発明の第２の実施の形態における多室形空気調和機の運転制御方法を示す制御ブロック図、図６は、同多室形空気調和機の運転制御方法を示すフローチャート、図７は、同多室形空気調和機の運転制御方法を示すタイムチャートである。尚、上記第１の実施の形態における多室形空気調和機と同一部分には、同一符号を付してその説明を省略する。 (Embodiment 2)
FIG. 5 is a control block diagram illustrating an operation control method for a multi-room air conditioner according to the second embodiment of the present invention, and FIG. 6 is a flowchart illustrating an operation control method for the multi-room air conditioner. 7 is a time chart showing an operation control method of the multi-room air conditioner. In addition, the same code | symbol is attached | subjected to the same part as the multi-room air conditioner in the said 1st Embodiment, and the description is abbreviate | omitted.

図５〜７において、４３は、吐出圧力検出装置、４４は、吐出圧力記憶装置である。こ
れらの図を用いて、吐出ガスバイパス弁及びレシーババイパス弁の動作を説明する。 5-7, 43 is a discharge pressure detection apparatus, 44 is a discharge pressure memory | storage device. The operation of the discharge gas bypass valve and the receiver bypass valve will be described with reference to these drawings.

冷房運転時でしかも、起動制御中、圧縮機周波数は起動周波数Ｈｚ１で運転している。起動制御終了後、圧縮機運転周波数は設定周波数Ｈｚ２まで上昇し、このとき接続運転室内機台数が設定値Ｉｎ１を超えており、しかも吐出圧力が設定値Ｐｏ１を下回っているため、吐出ガスバイパス弁１０及びレシーババイパス弁１１が開く。 During the cooling operation and during the start-up control, the compressor frequency is operated at the start-up frequency Hz1. After the start-up control is finished, the compressor operating frequency rises to the set frequency Hz2, and at this time, the number of connected operating indoor units exceeds the set value In1, and the discharge pressure is below the set value Po1, so the discharge gas bypass valve 10 and the receiver bypass valve 11 are opened.

これは吐出圧力が低いと室外熱交換器５の出口の冷媒の過冷却度が取れ、レシーバ９内は満液であると推定されるにも拘らず、圧縮機運転周波数が高く、しかも室内機運転台数が多いので、冷凍サイクル中を循環する冷媒量が不足していると判断し、吐出ガスをレシーバ９内へ導入して高圧の雰囲気とし、レシーバ９内に溜まっている液冷媒を追い出すことができる。また同時にレシーババイパス弁１１が開くので室外熱交換器５から吐出された液冷媒は、レシーバ９内に溜まることなく冷凍サイクル中へ循環する。これらにより冷凍サイクル中の冷媒循環量を増加させ、冷房能力を最大限に発揮する。 This is because if the discharge pressure is low, the degree of supercooling of the refrigerant at the outlet of the outdoor heat exchanger 5 can be obtained, and although the receiver 9 is estimated to be full, the compressor operating frequency is high and the indoor unit Since the number of operating units is large, it is determined that the amount of refrigerant circulating in the refrigeration cycle is insufficient, and the discharge gas is introduced into the receiver 9 to create a high-pressure atmosphere, and the liquid refrigerant accumulated in the receiver 9 is expelled. Can do. At the same time, since the receiver bypass valve 11 is opened, the liquid refrigerant discharged from the outdoor heat exchanger 5 circulates into the refrigeration cycle without accumulating in the receiver 9. These increase the amount of refrigerant circulating in the refrigeration cycle and maximize the cooling capacity.

（実施の形態３）
図８は、本発明の第３の実施の形態における多室形空気調和機の運転制御方法を示す制御ブロック図、図９は、同多室形空気調和機の運転制御方法を示すフローチャート、図１０は、同多室形空気調和機の運転制御方法を示すタイムチャートである。尚、上記実施の形態における多室形空気調和機と同一部分には、同一符号を付してその説明を省略する。図８〜１０において、５３は、室外凝縮温度検出装置、５４は、室外凝縮温度記憶装置である。これらの図を用いて吐出ガスバイパス弁１０及びレシーババイパス弁１１の動作を説明する。 (Embodiment 3)
FIG. 8 is a control block diagram illustrating an operation control method for a multi-room air conditioner according to a third embodiment of the present invention, and FIG. 9 is a flowchart illustrating an operation control method for the multi-room air conditioner. 10 is a time chart showing an operation control method of the multi-room air conditioner. In addition, the same code | symbol is attached | subjected to the same part as the multi-chamber type air conditioner in the said embodiment, and the description is abbreviate | omitted. 8-10, 53 is an outdoor condensation temperature detection apparatus, 54 is an outdoor condensation temperature memory | storage device. Operations of the discharge gas bypass valve 10 and the receiver bypass valve 11 will be described with reference to these drawings.

冷房運転時でしかも起動制御中、圧縮機周波数は起動周波数Ｈｚ１で運転している。起動制御終了後、圧縮機運転周波数は、設定周波数Ｈｚ２まで上昇し、このとき接続運転室内機台数が設定値Ｉｎ１を超えており、しかも室外凝縮温度が、設定値Ｔｓｏ１を下回っているため、吐出ガスバイパス弁１０及びレシーババイパス弁１１が開く。 During the cooling operation and during the startup control, the compressor frequency is operating at the startup frequency Hz1. After the start-up control is finished, the compressor operating frequency rises to the set frequency Hz2, and at this time the number of connected operating indoor units exceeds the set value In1, and the outdoor condensation temperature is below the set value Tso1, The gas bypass valve 10 and the receiver bypass valve 11 are opened.

これは、凝縮温度が低いと室外熱交換器出口の冷媒の過冷却度が取れ、レシーバ９内は満液であると推定されるにも拘らず、圧縮機運転周波数が高く、しかも室内機運転台数が多いので、冷凍サイクル中を循環する冷媒量が不足していると判断し、吐出ガスをレシーバ９内へ導入して高圧の雰囲気とし、レシーバ９内に溜まっている液冷媒を追い出すことができる。また同時にレシーババイパス弁１１が開くので室外熱交換器５から吐出された液冷媒は、レシーバ９内に溜まることなく冷凍サイクル中へ循環する。これらにより冷凍サイクル中の冷媒循環量を増加させ、冷房能力を最大限に発揮する。 This is because if the condensation temperature is low, the refrigerant at the outlet of the outdoor heat exchanger can be supercooled, and the receiver 9 is presumed to be full, but the compressor operating frequency is high and the indoor unit is operating. Since there are a large number of units, it is determined that the amount of refrigerant circulating in the refrigeration cycle is insufficient, and the discharge gas is introduced into the receiver 9 to create a high-pressure atmosphere, and the liquid refrigerant accumulated in the receiver 9 is expelled. it can. At the same time, since the receiver bypass valve 11 is opened, the liquid refrigerant discharged from the outdoor heat exchanger 5 circulates into the refrigeration cycle without accumulating in the receiver 9. These increase the amount of refrigerant circulating in the refrigeration cycle and maximize the cooling capacity.

（実施の形態４）
図１１は、本発明の第４の実施の形態における多室形空気調和機の運転制御方法を示す制御ブロック図、図１２は、同多室形空気調和機の運転制御方法を示すフローチャート、図１３は、同多室形空気調和機の運転制御方法を示すタイムチャートである。尚、上記実施の形態における多室形空気調和機と同一部分には、同一符号を付してその説明を省略する。 (Embodiment 4)
FIG. 11 is a control block diagram illustrating an operation control method for a multi-room air conditioner according to a fourth embodiment of the present invention, and FIG. 12 is a flowchart illustrating an operation control method for the multi-room air conditioner. 13 is a time chart showing an operation control method of the multi-room air conditioner. In addition, the same code | symbol is attached | subjected to the same part as the multi-chamber type air conditioner in the said embodiment, and the description is abbreviate | omitted.

図１１〜１３において、６３は、室内熱交温度検出装置、６４は室内熱交温度記憶装置である。これらの図を用いて吐出ガスバイパス弁１０及びレシーババイパス弁１１の動作を説明する。 11-13, 63 is an indoor heat exchanger temperature detection apparatus, 64 is an indoor heat exchanger temperature memory | storage device. Operations of the discharge gas bypass valve 10 and the receiver bypass valve 11 will be described with reference to these drawings.

冷房運転時でしかも起動制御中、圧縮機周波数は、起動周波数Ｈｚ１で運転している。起動制御終了後、圧縮機運転周波数は、設定周波数Ｈｚ２まで上昇し、このとき接続運転
室内機台数が設定値Ｉｎ１を超えており、しかも各室内機の室内熱交換器１３の出口温度を平均した値が設定値Ｔｅ１を上回っているため、吐出ガスバイパス弁１０及びレシーババイパス弁１２が開く。 During the cooling operation and during the startup control, the compressor frequency is operating at the startup frequency Hz1. After the start-up control is finished, the compressor operating frequency rises to the set frequency Hz2. At this time, the number of connected operating indoor units exceeds the set value In1, and the outlet temperature of the indoor heat exchanger 13 of each indoor unit is averaged. Since the value exceeds the set value Te1, the discharge gas bypass valve 10 and the receiver bypass valve 12 are opened.

これは、室内熱交出口温度が高いと冷媒不足で過熱度が取れていると推定されるにも拘らず、圧縮機運転周波数が高く、しかも室内機運転台数が多いので、冷凍サイクル中を循環する冷媒量が不足していると判断し、吐出ガスを、レシーバ９内へ導入して高圧の雰囲気とし、レシーバ９内に溜まっている液冷媒を追い出すことができる。また同時にレシーババイパス弁１２が開くので、室外熱交換器５から吐出された液冷媒は、レシーバ９内に溜まることなく冷凍サイクル中へ循環する。これらにより冷凍サイクル中の冷媒循環量を増加させ、冷房能力を最大限に発揮する。 This is because when the indoor heat exchanger outlet temperature is high, the compressor operating frequency is high and the number of indoor units operating is large, although it is estimated that the degree of superheat is obtained due to insufficient refrigerant. It is determined that the amount of refrigerant to be performed is insufficient, and the discharge gas is introduced into the receiver 9 to create a high-pressure atmosphere, so that the liquid refrigerant accumulated in the receiver 9 can be expelled. At the same time, since the receiver bypass valve 12 is opened, the liquid refrigerant discharged from the outdoor heat exchanger 5 circulates into the refrigeration cycle without accumulating in the receiver 9. These increase the amount of refrigerant circulating in the refrigeration cycle and maximize the cooling capacity.

（実施の形態５）
図１４は、本発明の第５の実施の形態における多室形空気調和機の運転制御方法を示す制御ブロック図、図１５は、同多室形空気調和機の運転制御方法を示すフローチャート、図１６は、同多室形空気調和機の運転制御方法を示すタイムチャートである。尚、上記実施の形態における多室形空気調和機と同一部分には、同一符号を付してその説明を省略する。 (Embodiment 5)
FIG. 14 is a control block diagram illustrating an operation control method for a multi-room air conditioner according to the fifth embodiment of the present invention, and FIG. 15 is a flowchart illustrating an operation control method for the multi-room air conditioner. 16 is a time chart showing an operation control method of the multi-room air conditioner. In addition, the same code | symbol is attached | subjected to the same part as the multi-chamber type air conditioner in the said embodiment, and the description is abbreviate | omitted.

図１４〜１６において、７３は、室内膨張弁開度検出装置、７４は、室内膨張弁開度記憶装置である。これらの図を用いて吐出ガスバイパス弁１０及びレシーババイパス弁１１の動作を説明する。冷房運転時でしかも起動制御中、圧縮機周波数は起動周波数Ｈｚ１で運転している。起動制御終了後、圧縮機運転周波数は、設定周波数Ｈｚ２まで上昇し、このとき接続運転室内機台数が設定値Ｉｎ１を超えており、しかも各室内機の室内膨張弁１２の開度を平均した値が設定値Ｐｓ１を上回っているため、吐出ガスバイパス弁１０及びレシーババイパス弁１１が開く。 14-16, 73 is an indoor expansion valve opening degree detection apparatus, 74 is an indoor expansion valve opening degree memory | storage device. Operations of the discharge gas bypass valve 10 and the receiver bypass valve 11 will be described with reference to these drawings. During the cooling operation and during the startup control, the compressor frequency is operating at the startup frequency Hz1. After the start-up control is finished, the compressor operating frequency rises to the set frequency Hz2, and at this time, the number of connected operating indoor units exceeds the set value In1, and the average value of the opening degree of the indoor expansion valve 12 of each indoor unit Since the value exceeds the set value Ps1, the discharge gas bypass valve 10 and the receiver bypass valve 11 are opened.

これは、室内膨張弁開度が大きいと冷媒不足で過熱度が取れていると推定されるにも拘らず、圧縮機運転周波数が高く、しかも室内機運転台数が多いので、冷凍サイクル中を循環する冷媒量が不足していると判断し、吐出ガスをレシーバ９内へ導入して高圧の雰囲気とし、レシーバ９内に溜まっている液冷媒を追い出すことができる。また同時にレシーババイパス弁１１が開くので室外熱交換器５から吐出された液冷媒は、レシーバ９内に溜まることなく冷凍サイクル中へ循環する。これらにより冷凍サイクル中の冷媒循環量を増加させ、冷房能力を最大限に発揮する。 This is because if the indoor expansion valve opening is large, the compressor operating frequency is high and the number of indoor unit operations is large even though it is estimated that the degree of superheat is low due to insufficient refrigerant. It is determined that the amount of refrigerant to be performed is insufficient, and the discharge gas is introduced into the receiver 9 to create a high-pressure atmosphere, so that the liquid refrigerant accumulated in the receiver 9 can be expelled. At the same time, since the receiver bypass valve 11 is opened, the liquid refrigerant discharged from the outdoor heat exchanger 5 circulates into the refrigeration cycle without accumulating in the receiver 9. These increase the amount of refrigerant circulating in the refrigeration cycle and maximize the cooling capacity.

以上のように、本発明にかかる多室形空気調和機の運転制御方法は、冷房能力を低下させることなく冷凍サイクル中の冷媒循環量を最適に制御することができるので、業務用、店舗用多室形空気調和機のレシーバ制御等の用途にも適用できる。 As described above, the operation control method for the multi-room air conditioner according to the present invention can optimally control the refrigerant circulation amount in the refrigeration cycle without reducing the cooling capacity. It can also be applied to uses such as receiver control for multi-room air conditioners.

本発明の第１の実施の形態における多室形空気調和機の運転制御方法を用いた多室形空気調和機の冷凍サイクル図Refrigeration cycle diagram of a multi-room air conditioner using the operation control method for the multi-room air conditioner according to the first embodiment of the present invention. 同多室形空調機の運転制御方法を示す制御ブロック図Control block diagram showing the operation control method of the multi-room air conditioner 同多室形空気調和機の運転制御方法を示すフローチャートFlowchart showing the operation control method of the multi-room air conditioner 同多室形空気調和機の運転制御方法を示すタイムチャートTime chart showing the operation control method of the multi-room air conditioner 本発明の第２の実施の形態における同多室形空調機の運転制御方法を示す制御ブロック図The control block diagram which shows the operation control method of the multi-room air conditioner in the 2nd Embodiment of this invention 同多室形空気調和機の運転制御方法を示すフローチャートFlowchart showing the operation control method of the multi-room air conditioner 同多室形空気調和機の運転制御方法を示すタイムチャートTime chart showing the operation control method of the multi-room air conditioner 本発明の第３の実施の形態における同多室形空調機の運転制御方法を示す制御ブロック図The control block diagram which shows the operation control method of the multi-room air conditioner in the 3rd Embodiment of this invention 同多室形空気調和機の運転制御方法を示すフローチャートFlowchart showing the operation control method of the multi-room air conditioner 同多室形空気調和機の運転制御方法を示すタイムチャートTime chart showing the operation control method of the multi-room air conditioner 本発明の第４の実施の形態における同多室形空調機の運転制御方法を示す制御ブロック図The control block diagram which shows the operation control method of the multi-room air conditioner in the 4th Embodiment of this invention 同多室形空気調和機の運転制御方法を示すフローチャートFlowchart showing the operation control method of the multi-room air conditioner 同多室形空気調和機の運転制御方法を示すタイムチャートTime chart showing the operation control method of the multi-room air conditioner 本発明の第５の実施の形態における同多室形空調機の運転制御方法を示す制御ブロック図The control block diagram which shows the operation control method of the multi-room air conditioner in the 5th Embodiment of this invention 同多室形空気調和機の運転制御方法を示すフローチャートFlowchart showing the operation control method of the multi-room air conditioner 同多室形空気調和機の運転制御方法を示すタイムチャートTime chart showing the operation control method of the multi-room air conditioner 従来の多室形空気調和機の冷凍サイクル図Refrigeration cycle diagram of a conventional multi-room air conditioner

１圧縮機
１ａ圧縮機吐出管
３４方弁
４オイルセパレータ
５室外熱交換器
６室外送風機
７外気温度センサー
８膨張弁（減圧装置）
９レシーバ
１０吐出ガスバイパス弁（第２の電磁２方弁）
１１レシーババイパス弁（第１の電磁２方弁）
１２室内膨張弁 DESCRIPTION OF SYMBOLS 1 Compressor 1a Compressor discharge pipe 3 4-way valve 4 Oil separator 5 Outdoor heat exchanger 6 Outdoor blower 7 Outside air temperature sensor 8 Expansion valve (pressure reduction device)
9 Receiver 10 Discharge gas bypass valve (second electromagnetic two-way valve)
11 Receiver bypass valve (first electromagnetic two-way valve)
12 Indoor expansion valve

Claims

能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ低外気温時、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くことを特徴とする多室形空気調和機の運転制御方法。 It is composed of a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of indoor units connected to the outdoor unit, and is arranged at the outlet of the outdoor heat exchanger. In a method for controlling the operation of a multi-chamber air conditioner provided with a receiver connected via a compressor discharge pipe and a first electromagnetic two-way valve, a second electromagnetic that bypasses the inlet and outlet of the receiver If a two-way valve is provided and the number of connected indoor units exceeds the set value when the cooling operation starts and the compressor operating frequency is equal to or higher than the set value and the low outside temperature, the second electromagnetic two-way An operation control method for a multi-room air conditioner, wherein the first electromagnetic two-way valve is opened simultaneously with opening of the valve.

能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ吐出圧力が設定値以下のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くことを特徴とする多室形空気調和機の運転制御方法。 It is composed of a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of indoor units connected to the outdoor unit, and is arranged at the outlet of the outdoor heat exchanger. In a method for controlling the operation of a multi-chamber air conditioner provided with a receiver connected via a compressor discharge pipe and a first electromagnetic two-way valve, a second electromagnetic that bypasses the inlet and outlet of the receiver When the number of connected indoor units exceeds the set value when the cooling operation is started and the compressor operating frequency is equal to or higher than the set value and the discharge pressure is equal to or lower than the set value, An operation control method for a multi-room air conditioner, wherein the first electromagnetic two-way valve is opened simultaneously with the opening of the electromagnetic two-way valve.

能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ室外凝縮温度が設定値以下のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くことを特徴とする多室形空気調和機の運転制御方法。 It is composed of a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of indoor units connected to the outdoor unit, and is arranged at the outlet of the outdoor heat exchanger. In a method for controlling the operation of a multi-chamber air conditioner provided with a receiver connected via a compressor discharge pipe and a first electromagnetic two-way valve, a second electromagnetic that bypasses the inlet and outlet of the receiver When a cooling operation is started and the compressor operating frequency is equal to or higher than the set value and the outdoor condensing temperature is equal to or lower than the set value, when the number of connected indoor units exceeds the set value, An operation control method for a multi-room air conditioner, wherein the first electromagnetic two-way valve is opened simultaneously with the opening of the second electromagnetic two-way valve.

能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ前記室内機に設けた室内熱交換器の出口温度が設定値以上のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くことを特徴とする多室形空気調和機の運転制御方法。 It is composed of a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of indoor units connected to the outdoor unit, and is arranged at the outlet of the outdoor heat exchanger. In a method for controlling the operation of a multi-chamber air conditioner provided with a receiver connected via a compressor discharge pipe and a first electromagnetic two-way valve, a second electromagnetic that bypasses the inlet and outlet of the receiver When the cooling operation is started and the compressor operating frequency is equal to or higher than the set value and the outlet temperature of the indoor heat exchanger provided in the indoor unit is equal to or higher than the set value, the connected indoor unit is operated. When the number exceeds the set value, the second electromagnetic two-way valve opens and the first electromagnetic two-way valve opens at the same time.

能力可変型の圧縮機と室外送風機と室外熱交換器と減圧装置を配設した室外機と、前記室外機に接続された複数台の室内機から構成され、前記室外熱交換器の出口に配設され、圧縮機吐出管と第１の電磁２方弁を介して接続されたレシーバを備えた多室形空気調和機の運転制御方法において、前記レシーバの入口と出口をバイパスする第２の電磁２方弁を設け、冷房運転開始時でしかも圧縮機運転周波数が設定値以上でかつ前記室内機に設けた室内膨張弁の開度が設定値以上のとき、接続された前記室内機の運転台数が設定値を上回ると、前記第２の電磁２方弁が開くと同時に、前記第１の電磁２方弁を開くことを特徴とする多室形空気調和機の運転制御方法。 It is composed of a variable capacity compressor, an outdoor fan, an outdoor heat exchanger, an outdoor unit provided with a pressure reducing device, and a plurality of indoor units connected to the outdoor unit, and is arranged at the outlet of the outdoor heat exchanger. In a method for controlling the operation of a multi-chamber air conditioner provided with a receiver connected via a compressor discharge pipe and a first electromagnetic two-way valve, a second electromagnetic that bypasses the inlet and outlet of the receiver The number of connected indoor units operated when a two-way valve is provided and when the cooling operation starts and the compressor operating frequency is equal to or higher than a set value and the opening of the indoor expansion valve provided in the indoor unit is equal to or higher than the set value. When the value exceeds a set value, the second electromagnetic two-way valve opens and the first electromagnetic two-way valve opens at the same time.