JP2006118764A - Air conditioner - Google Patents

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JP2006118764A
JP2006118764A JP2004305484A JP2004305484A JP2006118764A JP 2006118764 A JP2006118764 A JP 2006118764A JP 2004305484 A JP2004305484 A JP 2004305484A JP 2004305484 A JP2004305484 A JP 2004305484A JP 2006118764 A JP2006118764 A JP 2006118764A
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expansion valve
compressor
detected
set time
signal
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Hiroyuki Takeuchi
裕幸 武内
Junji Hayashi
淳二 林
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner that can maintain the optimal refrigerating cycle state and derive the capacity to a maximum extent, by detecting the refrigerating cycle state just before a stop of a compressor on detecting OFF signal of a thermostat, promoting the pressure balance during the stop of the compressor by adjusting the opening of an expansion valve, and preventing a liquid refrigerant from returning to the suction side at a time when ON signal of the thermostat is detected and the compressor is started. <P>SOLUTION: Indoor and outdoor air temperatures are detected when OFF signal of the thermostat is detected, and the expansion valve during the stop of the compressor is made to wait ready not in the full closed state but in an opening state determined based on the indoor and outdoor air temperatures. Thus, the durability of the expansion valve is secured, the liquid compression is avoided, the compressor is started certainly, and the refrigerating cycle is stabilized early. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、膨張弁制御を搭載した空気調和機に関するものである。   The present invention relates to an air conditioner equipped with expansion valve control.

従来この種空気調和機の膨張弁制御方法は、図１のフローチャート及び図２のタイムチャート並びに図３のブロック図に示すように、サーモＯＮ後液冷媒が一度に圧縮機の吸入側に返って圧縮機が液圧縮を起こさないように、サーモＯＦＦ信号を検知すると圧縮機を停止すると同時に、膨張弁を閉弁し液冷媒が室内側に流れないように冷媒回路を遮断していた。次にサーモＯＮ信号検知後、所定の時間後膨張弁を全開にすることにより圧力をバランスさせ圧縮機の起動不良を起さないよう最適な冷凍サイクル状態を維持し、性能を最大限に引出すものである（例えば、特許文献１参照）。
特開２００１−１２８０８号公報 Conventionally, the expansion valve control method for this type of air conditioner is such that, as shown in the flowchart of FIG. 1, the time chart of FIG. 2, and the block diagram of FIG. In order to prevent the compressor from causing liquid compression, when the thermo-OFF signal is detected, the compressor is stopped, and at the same time, the expansion valve is closed to shut off the refrigerant circuit so that liquid refrigerant does not flow indoors. Next, after detecting the thermo-ON signal, the expansion valve is fully opened after a predetermined time to maintain the optimum refrigeration cycle so that the pressure is balanced and the compressor does not start up poorly. (For example, see Patent Document 1).
Japanese Patent Laid-Open No. 2001-12808

しかしながら、前記従来の構成では、一定速機のサーモＯＮＯＦＦ回数はインバーター機に比べて多いため、圧縮機停止の度に膨張弁を全閉するには膨張弁の作動耐久に限界があった。   However, in the conventional configuration, since the thermo-ON / OFF frequency of the constant speed machine is larger than that of the inverter machine, there is a limit to the operation durability of the expansion valve to fully close the expansion valve each time the compressor is stopped.

また運転中過負荷状態では、圧縮機停止後高低圧をバランスさせるには時間を要し、ひいてはサーモＯＮ信号を検知して圧縮機を起動させる場合、起動不良の原因となる課題を有していた。   Moreover, in the overload state during operation, it takes time to balance the high and low pressure after the compressor stops, and as a result, when the compressor is started by detecting the thermo-ON signal, there is a problem that causes a start failure. It was.

また上記膨張弁の耐久性の課題を解決するために、サーモＯＦＦを検知したら、膨張弁は全開のままで待機し、その代わりサーモＯＮ時の液冷媒が返って来るのを防ぐために、冷媒回路中にレシーバを入れる手段も考えられるが、レシーバを入れることでの収納スペースの課題、あるいはコストアップの要因となる課題を有していた。   Further, in order to solve the above-mentioned problem of the durability of the expansion valve, when detecting the thermo OFF, the expansion valve is kept fully open to stand by, and instead, the refrigerant circuit is used to prevent the liquid refrigerant from returning when the thermo is ON. Although a means for putting the receiver inside is conceivable, there is a problem of storage space by putting the receiver or a problem that causes an increase in cost.

本発明は前記従来の課題を解決するもので、サーモＯＦＦ信号を検知したら圧縮機停止直前の冷凍サイクル状態を検知して、膨張弁の開度を調節することにより圧縮機停止中の圧力バランスを促進し、かつサーモＯＮ信号を検知して圧縮機起動時、液冷媒が一度に吸入側に返って来るのを防ぐことにより最適な冷凍サイクル状態を維持し能力を最大限に引き出すことを可能にした空気調和機を提供することを目的とする。   The present invention solves the above-described conventional problems. When a thermo-off signal is detected, the refrigeration cycle state immediately before the compressor is stopped is detected, and the pressure balance during the compressor stop is adjusted by adjusting the opening of the expansion valve. It is possible to maintain the optimal refrigeration cycle and maximize the capacity by preventing the liquid refrigerant from returning to the suction side at the same time when the compressor is started by detecting the thermo-ON signal An object of the present invention is to provide an air conditioner.

前記従来の課題を解決するために本発明の空気調和機は第４図の制御ブロック図に示すように、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室外気温を検出して圧縮機を停止し、第１の設定時間膨張弁は目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させるもので、これによって、冷媒流量調節が可能としたものである。   In order to solve the above-mentioned conventional problems, the air conditioner of the present invention detects and compresses the outdoor air temperature when a thermo-OFF signal is detected during cooling, dehumidification or heating operation as shown in the control block diagram of FIG. The machine is stopped, the first set time expansion valve waits at the target opening, and when the thermo ON signal is detected after the first set time, the expansion valve is fully opened and held for the second set time, and then compressed. This is to start the machine, thereby enabling the refrigerant flow rate to be adjusted.

また本発明の空気調和機は第５図の制御ブロック図に示すように、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室外熱交換器温度を検出して圧縮機を停止し、第１の設定時間膨張弁は目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させるもので、これによって、冷媒流量調節が可能としたものである。   Further, as shown in the control block diagram of FIG. 5, the air conditioner of the present invention detects the outdoor heat exchanger temperature and stops the compressor when detecting the thermo OFF signal during cooling, dehumidification or heating operation, The first set time expansion valve waits at the target opening, and when the thermo-ON signal is detected after the first set time, the expansion valve is fully opened and held for the second set time, and then the compressor is started. Thus, the refrigerant flow rate can be adjusted.

また本発明の空気調和機は第６図の制御ブロック図に示すように、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室内温度を検出して圧縮機を停止し、第１の設定時間膨張弁は目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させるもので、これによって、冷媒流量調節が可能としたものである。   Further, as shown in the control block diagram of FIG. 6, the air conditioner of the present invention detects the indoor temperature when the thermo OFF signal is detected during cooling, dehumidification or heating operation, and stops the compressor, The set time expansion valve stands by at the target opening, and when the thermo-ON signal is detected after the first set time, the compressor is started after the expansion valve is fully opened and held for the second set time. Thus, the refrigerant flow rate can be adjusted.

また本発明の空気調和機は第７図の制御ブロック図に示すように、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室内外温度を検出して圧縮機を停止し、第１の設定時間膨張弁は前記室内外温度から設定される開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁は全開にて第２の設定時間保持した後、圧縮機を起動させるもので、これによって、冷媒流量調節が可能としたものである。   Further, as shown in the control block diagram of FIG. 7, the air conditioner of the present invention detects the indoor / outdoor temperature when the thermo OFF signal is detected during cooling, dehumidification or heating operation, and stops the compressor. The expansion valve waits at the opening set from the indoor / outdoor temperature, and when the thermo-ON signal is detected after the first setting time, the expansion valve is fully opened and held for the second setting time, and then compressed. This is to start the machine, thereby enabling the refrigerant flow rate to be adjusted.

また本発明の空気調和機は第８図の制御ブロック図に示すように、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室内外温度を検出して圧縮機停止後、第１の設定時間以降で第２の設定時間までは膨張弁は第１の開度で待機し、第２の設定時間以降第３の設定時間までは膨張弁は第２の開度で待機し、第３の設定時間以降は膨張弁は第３の開度で待機し、サーモＯＮ信号を検知すると、膨張弁は全開にて第４の設定時間保持した後、圧縮機を起動させるもので、これによって、冷媒流量調節が可能としたものである。   Further, as shown in the control block diagram of FIG. 8, the air conditioner of the present invention detects the indoor / outdoor temperature when detecting the thermo OFF signal during cooling, dehumidification or heating operation, and after the compressor is stopped, The expansion valve waits at the first opening until the second setting time after the setting time, and the expansion valve waits at the second opening until the third setting time after the second setting time. After the set time, the expansion valve waits at the third opening, and when the thermo-ON signal is detected, the expansion valve holds the fourth set time in the fully open state, and then starts the compressor. The refrigerant flow rate can be adjusted.

本発明の空気調和機は最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。   The air conditioner of the present invention can maintain an optimal refrigeration cycle state and maximize performance.

第１の発明は、能力一定型圧縮機と４方弁と室外熱交換器及び送風機並びに冷媒流量を調節する電動膨張弁で形成される室外機において、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室外気温を検出して圧縮機を停止し、第１の設定時間膨張弁は目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。   The first invention is an outdoor unit formed of a constant capacity compressor, a four-way valve, an outdoor heat exchanger, a blower, and an electric expansion valve that adjusts the flow rate of refrigerant, and in the cooling, dehumidifying or heating operation, When the signal is detected, the outdoor temperature is detected, the compressor is stopped, the first set time expansion valve stands by at the target opening, and when the thermo ON signal is detected after the first set time, the expansion valve is fully opened. Then, after maintaining the second set time, the compressor can be started to maintain the optimum refrigeration cycle state and maximize performance.

第２の発明は、特に第１の発明の空気調和機を、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室外熱交換器温度を検出して圧縮機を停止し、第１の設定時間膨張弁は目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる
第３の発明は、特に第１の発明または第２の空気調和機を、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室内吸込み温度を検出して圧縮機を停止し、第１の設定時間膨張弁は目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。 In the second aspect of the invention, particularly when the air conditioner of the first aspect of the invention is in the cooling, dehumidifying or heating operation, when the thermo-OFF signal is detected, the outdoor heat exchanger temperature is detected and the compressor is stopped. The set time expansion valve waits at the target opening, and when the thermo-ON signal is detected after the first set time, the expansion valve is fully opened and held for the second set time, and then the compressor is started to be optimal. The refrigeration cycle state can be maintained and the performance can be maximized. The third invention detects the thermo-OFF signal particularly during the cooling, dehumidification or heating operation of the first invention or the second air conditioner. Then, the indoor suction temperature is detected, the compressor is stopped, the first set time expansion valve stands by at the target opening, and when the thermo-ON signal is detected after the first set time, the expansion valve is fully opened. Hold for 2 set times and then compress By starting the machine, the optimum refrigeration cycle state can be maintained and the performance can be maximized.

第４の発明は、特に第１〜第３のいづれかの空気調和機を、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室内吸込み温度及び外気温を検出して圧縮機を停止し、第１の設定時間膨張弁は前記室内外温度から設定される開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁は全開にて第２の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。   In the fourth aspect of the invention, particularly when any one of the first to third air conditioners is detected during the cooling, dehumidification or heating operation, when the thermo OFF signal is detected, the indoor suction temperature and the outside air temperature are detected and the compressor is stopped. The first set time expansion valve waits at the opening set from the indoor / outdoor temperature, and when the thermo-ON signal is detected after the first set time, the expansion valve is fully opened and held for the second set time. Thereafter, the compressor can be started to maintain the optimum refrigeration cycle state and maximize performance.

第５の発明は、特に第１〜第４のいづれかの空気調和機を、冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると圧縮機停止後第１の設定時間以降で第２の設定時間までは膨張弁は第１の開度で待機し、第２の設定時間以降第３の設定時間までは膨張弁は第２の開度で待機し、第３の設定時間以降は膨張弁は第３の開度で待機し、サーモＯＮ信号を検知すると、膨張弁は全開にて第４の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。   In the fifth aspect of the invention, in particular, when any one of the first to fourth air conditioners is detected during the cooling, dehumidification or heating operation, when the thermo OFF signal is detected, the second setting is made after the first set time after the compressor is stopped. The expansion valve waits at the first opening until time, the expansion valve waits at the second opening after the second set time until the third set time, and the expansion valve Waiting at the third opening and detecting the thermo-ON signal, the expansion valve is fully opened and held for the fourth set time, and then the compressor is started to maintain the optimum refrigeration cycle state and maximize performance. It can be pulled out to the limit.

以下、本発明の実施の形態について図面を参照して説明する。なお本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）
第９図は発明の第１の実施の形態における冷凍サイクル図である。同図において、冷凍サイクルは能力一定型圧縮機１、暖房運転と除霜運転を切換える４方弁２、室外熱交換器３、室外送風機４、室外熱交温度センサー５、電動膨張弁６、室内熱交温度センサー７、室内吸込み温度センサー８とで構成されている。暖房運転時には４方弁２が切り変わることにより、同図の矢印の方向に冷媒が流れるようになっている。 (Embodiment 1)
FIG. 9 is a refrigeration cycle diagram in the first embodiment of the invention. In the figure, the refrigeration cycle is a constant capacity compressor 1, a four-way valve 2 for switching between heating operation and defrosting operation, an outdoor heat exchanger 3, an outdoor blower 4, an outdoor heat exchanger temperature sensor 5, an electric expansion valve 6, an indoor The heat exchange temperature sensor 7 and the indoor suction temperature sensor 8 are configured. When the four-way valve 2 is switched during the heating operation, the refrigerant flows in the direction of the arrow in FIG.

次に第１０図フローチャート及び第１１図のタイムチャートにより、膨張弁制御の動作を説明する。   Next, the operation of the expansion valve control will be described with reference to the flowchart of FIG. 10 and the time chart of FIG.

サーモＯＦＦ信号を検知すると室外気温Ｔｇを検出して圧縮機を停止し、前記外気温Ｔｇが設定温度Ｔｇ１より低い場合、膨張弁は第１の設定時間ｔ１目標開度Ｐｓ１で待機し、前記外気温Ｔｇが設定温度Ｔｇ１より高くてＴｇ２より低い場合、膨張弁は第１の設定時間ｔ１目標開度Ｐｓ２で待機し、前記外気温Ｔｇが設定温度Ｔｇ２より高い場合、膨張弁は第１の設定時間ｔ１目標開度Ｐｓ３で待機し、第１の設定時間ｔ１以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間ｔ２保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。   When the thermo OFF signal is detected, the outdoor air temperature Tg is detected and the compressor is stopped. When the outdoor air temperature Tg is lower than the set temperature Tg1, the expansion valve waits at the first set time t1 target opening Ps1, and the outside When the temperature Tg is higher than the set temperature Tg1 and lower than Tg2, the expansion valve stands by at the first set time t1 target opening Ps2, and when the outside temperature Tg is higher than the set temperature Tg2, the expansion valve is set to the first setting. When the thermo-ON signal is detected after the first set time t1 after waiting at the time t1 target opening Ps3, the expansion valve is fully opened and held for the second set time t2, and then the compressor is started to be optimal. Maintains the refrigeration cycle and maximizes performance.

（実施の形態２）
第１２図及び第１３図は本発明の第２の実施の形態の膨張弁制御方法を示すフローチャート及びタイムチャートである。 (Embodiment 2)
FIGS. 12 and 13 are a flowchart and a time chart showing the expansion valve control method of the second embodiment of the present invention.

サーモＯＦＦ信号を検知すると室外熱交換器温度Ｔｃを検出して圧縮機を停止し前記熱交温度Ｔｃが設定温度Ｔｃ１より低い場合、膨張弁は第１の設定時間ｔ１目標開度Ｐｓ１で待機し、前記熱交温度Ｔｃが設定温度Ｔｃ１より高くてＴｃ２より低い場合、膨張弁は第１の設定時間ｔ１目標開度Ｐｓ２で待機し、前記熱交温度Ｔｃが設定温度Ｔｃ２より高い場合、膨張弁は第１の設定時間ｔ１目標開度Ｐｓ３で待機し、第１の設定時間ｔ１以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間ｔ２保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。   When the thermo OFF signal is detected, the outdoor heat exchanger temperature Tc is detected, the compressor is stopped, and when the heat exchange temperature Tc is lower than the set temperature Tc1, the expansion valve waits at the first set time t1 target opening Ps1. When the heat exchange temperature Tc is higher than the set temperature Tc1 and lower than Tc2, the expansion valve stands by at the first set time t1 target opening Ps2, and when the heat exchange temperature Tc is higher than the set temperature Tc2, Waits at the first set time t1 target opening Ps3, detects the thermo-ON signal after the first set time t1, holds the second set time t2 with the expansion valve fully open, and then starts the compressor By doing so, the optimum refrigeration cycle state can be maintained and the performance can be maximized.

（実施の形態３）
第１４図及び第１５図は本発明の第３の実施の形態の膨張弁制御方法を示すフローチャート及びタイムチャートである。 (Embodiment 3)
FIGS. 14 and 15 are a flowchart and a time chart showing the expansion valve control method of the third embodiment of the present invention.

サーモＯＦＦ信号を検知すると室内吸込み温度Ｔｉを検出して圧縮機を停止し、前記吸込み温度Ｔｉが設定温度Ｔｉ１より低い場合、膨張弁は第１の設定時間ｔ１目標開度Ｐｓ１で待機し、前記熱交温度Ｔｉが設定温度Ｔｉ１より高くてＴｉ２より低い場合、膨張弁は第１の設定時間ｔ１目標開度Ｐｓ２で待機し、前記熱交温度Ｔｉが設定温度Ｔｉ２より高い場合、膨張弁は第１の設定時間ｔ１目標開度Ｐｓ３で待機し、第１の設定時間ｔ１以
降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間ｔ２保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。 When the thermo OFF signal is detected, the indoor suction temperature Ti is detected and the compressor is stopped. When the suction temperature Ti is lower than the set temperature Ti1, the expansion valve waits at the first set time t1 target opening Ps1, When the heat exchange temperature Ti is higher than the set temperature Ti1 and lower than Ti2, the expansion valve stands by at the first set time t1 target opening Ps2, and when the heat exchange temperature Ti is higher than the set temperature Ti2, the expansion valve If the thermo-ON signal is detected after the first set time t1 after waiting for the set time t1 target opening Ps3, the compressor is started after the expansion valve is fully opened and held for the second set time t2. Therefore, the optimum refrigeration cycle state can be maintained and the performance can be maximized.

（実施の形態４）
第１６図及び第１７図は本発明の第４の実施の形態の膨張弁制御方法を示すフローチャート及びタイムチャートである。 (Embodiment 4)
FIGS. 16 and 17 are a flow chart and a time chart showing the expansion valve control method of the fourth embodiment of the present invention.

サーモＯＦＦ信号を検知すると室内吸込み温度Ｔｉ及び外気温Ｔｇを検出して圧縮機を停止し、膨張弁は第１の設定時間ｔ１前記吸込み温度Ｔｉと外気温Ｔｇから図１８に示す温度領域Ｔｅ１−９に相当する目標開度Ｐｓ１−９で待機し、第１の設定時間ｔ１以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間ｔ２保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。   When the thermo OFF signal is detected, the indoor suction temperature Ti and the outside air temperature Tg are detected and the compressor is stopped, and the expansion valve operates from the suction temperature Ti and the outside air temperature Tg for the first set time t1 in the temperature region Te1- shown in FIG. When the thermo-ON signal is detected after the first set time t1 after waiting at the target opening Ps1-9 corresponding to 9, the compressor is started after the expansion valve is fully opened and held for the second set time t2. As a result, the optimum refrigeration cycle state can be maintained and the performance can be maximized.

（実施の形態５）
第１９図及び第２０図は本発明の第５の実施の形態の膨張弁制御方法を示すフローチャート及びタイムチャートである。 (Embodiment 5)
FIGS. 19 and 20 are a flowchart and a time chart showing the expansion valve control method of the fifth embodiment of the present invention.

サーモＯＦＦ信号を検知すると室内吸込み温度Ｔｉ及び外気温Ｔｇを検出して圧縮機を停止し、膨張弁は第１の設定時間ｔ１前記吸込み温度Ｔｉと外気温Ｔｇから図１８に示す温度領域Ｔｅ１−９に相当する目標開度Ｐｓ１ａ−９ａで待機し、第１の設定時間ｔ１を超え第２の設定時間ｔ２以下の場合は、目標開度Ｐｓ１ｂ−９ｂで待機し、第２の設定時間ｔ２を超えた場合は目標開度Ｐｓ１ｃ−９ｃで待機し、第２の設定時間ｔ２以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第３の設定時間ｔ３保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができる。   When the thermo OFF signal is detected, the indoor suction temperature Ti and the outside air temperature Tg are detected and the compressor is stopped, and the expansion valve operates from the suction temperature Ti and the outside air temperature Tg for the first set time t1 in the temperature region Te1- shown in FIG. 9 and waits at the target opening Ps1b-9b when the first set time t1 is exceeded and the second set time t2 is less than or equal to the second set time t2. If exceeded, the system waits at the target opening Ps1c-9c. When a thermo-ON signal is detected after the second set time t2, the compressor is started after the expansion valve is fully opened and held at the third set time t3. As a result, the optimum refrigeration cycle state can be maintained and the performance can be maximized.

以上のように、本発明にかかる空気調和機は、最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことができるので、業務用、店舗用空気調和機の冷媒流量制御等の用途にも適用できる。   As described above, the air conditioner according to the present invention can maintain the optimum refrigeration cycle state and maximize performance, so that it can be used for applications such as refrigerant flow control of commercial and store air conditioners. Is also applicable.

従来の空気調和機の膨張弁制御方法のフローチャートFlowchart of conventional air conditioner expansion valve control method 従来の空気調和機の膨張弁制御方法のタイムチャートTime chart of conventional expansion valve control method for air conditioner 従来の空気調和機の膨張弁制御方法のブロック図Block diagram of a conventional air conditioner expansion valve control method 本発明の第１の実施形態を示す空気調和機のブロック図The block diagram of the air conditioner which shows the 1st Embodiment of this invention. 本発明の第２の実施形態を示す空気調和機のブロック図The block diagram of the air conditioner which shows the 2nd Embodiment of this invention. 本発明の第３の実施形態を示す空気調和機のブロック図The block diagram of the air conditioner which shows the 3rd Embodiment of this invention. 本発明の第４の実施形態を示す空気調和機のブロック図The block diagram of the air conditioner which shows the 4th Embodiment of this invention. 本発明の第５の実施形態を示す空気調和機のブロック図The block diagram of the air conditioner which shows the 5th Embodiment of this invention 本発明の第１の実施形態を示す空気調和機の冷凍サイクル図Refrigeration cycle diagram of the air conditioner showing the first embodiment of the present invention 本発明の第１の実施形態を示す膨張弁制御のフローチャートFlowchart of expansion valve control showing the first embodiment of the present invention 本発明の第１の実施形態を示す膨張弁制御のタイムチャートTime chart of expansion valve control showing the first embodiment of the present invention 本発明の第２の実施形態を示す膨張弁制御のフローチャートFlowchart of expansion valve control showing the second embodiment of the present invention 本発明の第２の実施形態を示す膨張弁制御のタイムチャートExpansion valve control time chart showing a second embodiment of the present invention 本発明の第３の実施形態を示す膨張弁制御のフローチャートFlowchart of expansion valve control showing the third embodiment of the present invention. 本発明の第３の実施形態を示す膨張弁制御のタイムチャートExpansion valve control time chart showing a third embodiment of the present invention 本発明の第４の実施形態を示す膨張弁制御のフローチャートFlowchart of expansion valve control showing the fourth embodiment of the present invention. 本発明の第４の実施形態を示す膨張弁制御のタイムチャートExpansion valve control time chart showing the fourth embodiment of the present invention 本発明の第４の実施形態を示す温度領域を示すグラフThe graph which shows the temperature range which shows the 4th Embodiment of this invention 本発明の第５の実施形態を示す膨張弁制御のフローチャートFlowchart of expansion valve control showing the fifth embodiment of the present invention 本発明の第５の実施形態を示す膨張弁制御のタイムチャートTime chart of expansion valve control showing the fifth embodiment of the present invention

符号の説明Explanation of symbols

１ 圧縮機
２ ４方弁
３ 室外熱交換器
４ 室外送風機
５ 室外熱交温度センサー
６ 膨張弁
７ 室内熱交温度センサー
８ 室内吸込み温度センサー DESCRIPTION OF SYMBOLS 1 Compressor 2 4-way valve 3 Outdoor heat exchanger 4 Outdoor fan 5 Outdoor heat exchange temperature sensor 6 Expansion valve 7 Indoor heat exchange temperature sensor 8 Indoor suction temperature sensor

Claims (5)

能力一定型圧縮機と４方弁と室外熱交換器及び送風機並びに冷媒流量を調節する電動膨張弁で形成される室外機において、冷房除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室外気温を検出して圧縮機を停止し、第１の設定時間膨張弁は目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことを可能とした空気調和機。 In an outdoor unit formed by a constant capacity compressor, a four-way valve, an outdoor heat exchanger, a blower, and an electric expansion valve that adjusts the refrigerant flow rate, when the thermo-OFF signal is detected during cooling dehumidification or heating operation, the outdoor temperature is reduced. Detect and stop the compressor, the first set time expansion valve waits at the target opening, and when the thermo ON signal is detected after the first set time, the expansion valve is fully opened and held for the second set time After that, the air conditioner is able to maintain the optimum refrigeration cycle state by starting the compressor and maximize the performance. 冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室外熱交換器温度を検出して圧縮機を停止し、第１の設定時間膨張弁は目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことを可能にした請求項第１に記載の空気調和機。 During cooling, dehumidification or heating operation, when the thermo OFF signal is detected, the outdoor heat exchanger temperature is detected and the compressor is stopped, the first set time expansion valve waits at the target opening, and the first set time When the thermo-ON signal is detected thereafter, the expansion valve is fully opened and held for the second set time, and then the compressor is started to maintain the optimal refrigeration cycle state and maximize performance. The air conditioner according to claim 1. 冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室内吸込み温度を検出して圧縮機を停止し、第１の設定時間膨張弁は目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことを可能にした請求項第１または第２に記載の空気調和機。 During cooling, dehumidification or heating operation, if a thermo OFF signal is detected, the indoor suction temperature is detected and the compressor is stopped, the first set time expansion valve waits at the target opening, and after the first set time When the thermo-ON signal is detected, the expansion valve is fully opened and held for the second set time, and then the compressor is started to maintain the optimal refrigeration cycle state and to maximize performance. Item 1. An air conditioner according to item 1 or 2. 冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると室内吸込み温度及び室外気温を検出して圧縮機を停止し、第１の設定時間膨張弁は前記室内外温度から設定される目標開度で待機し、第１の設定時間以降でサーモＯＮ信号を検知すると、膨張弁を全開にて第２の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことを可能にした請求項第１〜３のいずれかに記載の空気調和機。 During cooling, dehumidification or heating operation, if a thermo OFF signal is detected, the indoor suction temperature and the outdoor air temperature are detected, the compressor is stopped, and the first set time expansion valve is a target opening set from the indoor / outdoor temperature When the thermo-ON signal is detected after the first set time, the optimum refrigeration cycle state is maintained by starting the compressor after holding the expansion valve fully open for the second set time. The air conditioner according to any one of claims 1 to 3, wherein the air conditioner can be extracted to the maximum. 冷房、除湿または暖房運転時において、サーモＯＦＦ信号を検知すると圧縮機停止後第１の設定時間以下の場合膨張弁は第１の開度で待機し、第１の設定時間以降で第２の設定時間までは膨張弁は第２の開度で待機し、第２の設定時間以降は膨張弁は第３の開度で待機し、サーモＯＮ信号を検知すると、膨張弁は全開にて第３の設定時間保持した後、圧縮機を起動させることにより最適な冷凍サイクル状態を維持し、性能を最大限に引き出すことを可能にした請求項第１〜４のいずれか１項に記載の空気調和機。 When a thermo-off signal is detected during cooling, dehumidification or heating operation, the expansion valve waits at the first opening after the compressor is stopped, and the second setting after the first setting time. Until the time, the expansion valve waits at the second opening, and after the second set time, the expansion valve waits at the third opening. When the thermo-ON signal is detected, the expansion valve is fully opened and the third opening is reached. The air conditioner according to any one of claims 1 to 4, wherein an optimum refrigeration cycle state is maintained by activating the compressor after the set time is maintained, and the performance can be maximized. .
JP2004305484A 2004-10-20 2004-10-20 Air conditioner Pending JP2006118764A (en)

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JP2008286464A (en) * 2007-05-17 2008-11-27 Fuji Koki Corp Valve control device
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JP2011158190A (en) * 2010-02-02 2011-08-18 Panasonic Corp Method for controlling air-conditioner
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JP2008286464A (en) * 2007-05-17 2008-11-27 Fuji Koki Corp Valve control device
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JP2016095105A (en) * 2014-11-17 2016-05-26 パナソニックＩｐマネジメント株式会社 Air conditioning device
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US11098936B2 (en) 2016-11-07 2021-08-24 Gd Midea Heating & Ventilating Equipment Co., Ltd. Multi-split system and liquid return prevention control method thereof
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JP2022172976A (en) * 2021-05-07 2022-11-17 ダイキン工業株式会社 Air-conditioner
JP7216309B2 (en) 2021-05-07 2023-02-01 ダイキン工業株式会社 air conditioner
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US12055312B2 (en) 2021-05-07 2024-08-06 Daikin Industries, Ltd. Air conditioner
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