JP2017044460A

JP2017044460A - Air conditioner

Info

Publication number: JP2017044460A
Application number: JP2015169651A
Authority: JP
Inventors: 田中　慎一; Shinichi Tanaka; 慎一田中
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2015-08-28
Filing date: 2015-08-28
Publication date: 2017-03-02
Anticipated expiration: 2035-08-28
Also published as: JP6573507B2

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner capable of shortening a time required for narrowing a control valve and suppressing refrigerant noise.SOLUTION: A storage part 91 stores a selection condition as to whether a normal opening or narrowed opening is selected, in activation of an air conditioner 100. The selection condition is set to a condition in which refrigerant noise is easy to occur. An indoor control unit 9, when it is determined that indoor temperature and indoor humidity corresponds to the selection condition stored by the storage part 91, sets an expansion valve 3 to the narrowed opening, and then ends operation of initial setting. Also, the indoor control unit 9, when it is determined that the indoor temperature and indoor humidity do not correspond to the selection condition, sets the expansion valve 3 to the normal opening.SELECTED DRAWING: Figure 1

Description

本発明は、空気調和機に関する。 The present invention relates to an air conditioner.

冷房機能及び暖房機能等を有する空気調和機は、一般に室外に設置される室外熱交換器と、室内に設置される室内熱交換器とを備える。室外熱交換器は膨張弁及び圧縮機夫々に接続されている。また、室内熱交換器は、前記膨張弁及び圧縮機夫々に接続されている。 An air conditioner having a cooling function, a heating function, and the like generally includes an outdoor heat exchanger installed outdoors and an indoor heat exchanger installed indoors. The outdoor heat exchanger is connected to each of the expansion valve and the compressor. The indoor heat exchanger is connected to each of the expansion valve and the compressor.

圧縮機、室外熱交換機、膨張弁及び室内熱交換器は、冷凍サイクルを形成しており、空気調和機は、冷凍サイクルを利用して、室内機が設置された室内の冷房又は暖房等を行う。空気調和機が冷房を行う場合、冷媒が圧縮機、室外熱交換機、膨張弁及び室内熱交換器の順に移動する。具体的には、気体状の冷媒は、圧縮機により高温高圧となり、室外熱交換器を経て冷却され、液体となる。その後、冷媒は、膨張弁によりその流量が調節されつつ、減圧されて室内熱交換器に入り、蒸発して周囲の熱を奪い、低温低圧の気体となって圧縮機に戻る。ここで、室外熱交換器は凝縮器として機能し、室内熱交換器は、蒸発器として機能する（例えば、特許文献１参照）。 The compressor, the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger form a refrigeration cycle, and the air conditioner uses the refrigeration cycle to cool or heat the room where the indoor unit is installed. . When the air conditioner performs cooling, the refrigerant moves in the order of the compressor, the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger. Specifically, the gaseous refrigerant becomes high temperature and pressure by the compressor, is cooled through the outdoor heat exchanger, and becomes liquid. After that, the refrigerant is decompressed and enters the indoor heat exchanger while its flow rate is adjusted by the expansion valve, evaporates and takes away ambient heat, and returns to the compressor as a low-temperature and low-pressure gas. Here, an outdoor heat exchanger functions as a condenser, and an indoor heat exchanger functions as an evaporator (for example, refer patent document 1).

特許第３２３３４４７号公報Japanese Patent No. 3323447

しかしながら、空気調和機の起動時においては、冷媒の液化作用が不安定なため、室外熱交換器及び膨張弁の間において、気体及び液体が混ざり合っている。ここで、膨張弁の開度によっては、気体及び液体が混合した冷媒が膨張弁を通過する際、不快な音、いわゆる冷媒音が発生するという問題が生じる。 However, when the air conditioner is started, the liquefaction effect of the refrigerant is unstable, so that gas and liquid are mixed between the outdoor heat exchanger and the expansion valve. Here, depending on the opening degree of the expansion valve, when the refrigerant in which the gas and the liquid are mixed passes through the expansion valve, an unpleasant noise, that is, a so-called refrigerant noise is generated.

本発明は、斯かる事情に鑑みてなされたものであり、その目的とするところは、冷媒音を抑制することができる空気調和機を提供することにある。 The present invention has been made in view of such circumstances, and an object thereof is to provide an air conditioner capable of suppressing refrigerant noise.

本発明に係る空気調和機は、室外熱交換器及び室内熱交換器の間に配され、冷媒の流量を調節する調節弁と、該調節弁の開度を制御する調節弁制御部と、室内温度を測定する室内温度測定部と、室内湿度を測定する湿度測定部とを備え、前記調節弁制御部は、前記室内温度測定部が測定した室内温度が第１閾値よりも高い場合、又は前記湿度測定部が測定した室内湿度が第２閾値よりも高い場合、前記調節弁を第１開度に制御し、前記室内温度が前記第１閾値以下であり、かつ前記室内湿度が前記第２閾値以下である場合、前記調節弁を前記第１開度よりも開度が小さい第２開度に制御することを特徴とする。 An air conditioner according to the present invention is disposed between an outdoor heat exchanger and an indoor heat exchanger, and adjusts a flow rate of refrigerant, a control valve control unit that controls the opening of the control valve, An indoor temperature measuring unit for measuring temperature; and a humidity measuring unit for measuring indoor humidity, wherein the control valve control unit is configured such that the indoor temperature measured by the indoor temperature measuring unit is higher than a first threshold, or When the indoor humidity measured by the humidity measuring unit is higher than the second threshold, the control valve is controlled to the first opening, the indoor temperature is equal to or lower than the first threshold, and the indoor humidity is the second threshold. In the following cases, the control valve is controlled to a second opening that is smaller than the first opening.

本発明に係る空気調和機は、室外温度を測定する室外温度測定部を更に備え、前記調節弁制御部は、更に、前記室外温度測定部が測定した室外温度が第３閾値以上であり、かつ前記室内湿度が前記第２閾値以下である場合には、前記調節弁を前記第２開度に制御することを特徴とする。 The air conditioner according to the present invention further includes an outdoor temperature measurement unit that measures an outdoor temperature, and the control valve control unit further has an outdoor temperature measured by the outdoor temperature measurement unit equal to or greater than a third threshold value, and The control valve is controlled to the second opening when the indoor humidity is equal to or lower than the second threshold value.

本発明に係る空気調和機は、圧縮機と、室内温度及び室外温度に基づいて設定された目標回転数に基づき、前記圧縮機の動作を制御する圧縮機制御部とを更に備え、前記第１開度及び第２開度は、前記目標回転数に対応して設定されており、前記第２開度は、前記第１開度との差が前記目標回転数の大小に応じて大小となるように設定されていることを特徴とする。 The air conditioner according to the present invention further includes a compressor, and a compressor control unit that controls the operation of the compressor based on a target rotational speed set based on an indoor temperature and an outdoor temperature. The opening degree and the second opening degree are set corresponding to the target rotational speed, and the second opening degree is large or small depending on the magnitude of the target rotational speed. It is set as follows.

本発明に係る空気調和機は、前記圧縮機制御部は、前記圧縮機を作動開始から所定の回転数で作動させた後、前記目標回転数に基づいて回転数を上昇させて前記圧縮機を作動させ、前記調節弁制御部は、前記圧縮機制御部が前記圧縮機の回転数を上昇させた後、前記調節弁を前記第１開度としている場合、第１速度で、前記第２開度より小さい第３開度まで絞り、前記調節弁を前記第２開度としている場合、前記第１速度よりも速い第２速度で前記第３開度まで絞ることを特徴とする。 In the air conditioner according to the present invention, the compressor control unit operates the compressor at a predetermined number of rotations from the start of operation, and then increases the number of rotations based on the target number of rotations. The control valve controller is configured to operate the second valve at a first speed when the control valve is at the first opening after the compressor controller has increased the rotational speed of the compressor. When the throttle valve is throttled to a third opening that is less than the second angle and the control valve is set to the second opening, the throttle valve is throttled to the third opening at a second speed that is faster than the first speed.

本発明に係る空気調和機は、前記室外熱交換器には複数の室内熱交換器が接続されていることを特徴とする。 The air conditioner according to the present invention is characterized in that a plurality of indoor heat exchangers are connected to the outdoor heat exchanger.

本発明によれば、調節弁を絞る時間を短縮し、冷媒音を抑制することができる。 ADVANTAGE OF THE INVENTION According to this invention, the time which throttles a control valve can be shortened, and a refrigerant | coolant sound can be suppressed.

実施の形態１に係る空気調和機の構成を示す概略図である。It is the schematic which shows the structure of the air conditioner which concerns on Embodiment 1. FIG. 圧縮機の目標回転数についてのＬＵＴの概念図である。It is a conceptual diagram of LUT about the target rotation speed of a compressor. 膨張弁の開度に係る関数を示すグラフである。It is a graph which shows the function which concerns on the opening degree of an expansion valve. 選択条件を示すグラフである。It is a graph which shows selection conditions. 室内制御部による初期設定の手順を示すフローチャートである。It is a flowchart which shows the procedure of the initial setting by an indoor control part. 実施の形態２における膨張弁の開度に係る関数を示すグラフである。6 is a graph showing a function related to the opening degree of an expansion valve in the second embodiment. 実施の形態２における膨張弁の開度を決定する選択条件を示すグラフである。6 is a graph showing selection conditions for determining the opening degree of the expansion valve in the second embodiment. 室内制御部による初期設定の手順を示すフローチャートである。It is a flowchart which shows the procedure of the initial setting by an indoor control part. 実施の形態３に係る空気調和機の構成を示す概略図である。FIG. 6 is a schematic diagram illustrating a configuration of an air conditioner according to Embodiment 3.

以下、本発明をその実施の形態を示す図面に基づいて詳述する。
（実施の形態１）
図１は、実施の形態１に係る空気調和機の構成を示す概略図である。図１において、１００は空気調和機であり、空気調和機１００は、室外に設置される室外機１０１及び室内に設置される室内機１０２を備えている。空気調和機１００は、冷房機能及び暖房機能を有している。空気調和機１００は、リモートコントローラ１０３を備えており、該リモートコントローラ１０３により、運転のオンオフが行われ、冷房機能及び暖房機能の選択、設定温度等に係る情報が室内機１０２に送信される。なお、空気調和機１００は除湿機能を有していてもよい。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a schematic diagram illustrating a configuration of an air conditioner according to Embodiment 1. FIG. In FIG. 1, reference numeral 100 denotes an air conditioner, and the air conditioner 100 includes an outdoor unit 101 installed outside and an indoor unit 102 installed indoors. The air conditioner 100 has a cooling function and a heating function. The air conditioner 100 includes a remote controller 103. The remote controller 103 turns on and off the operation, and transmits information related to the selection of the cooling function and the heating function, the set temperature, and the like to the indoor unit 102. The air conditioner 100 may have a dehumidifying function.

室外機１０１は、室外熱交換器１と、四方弁２と、膨張弁３と、圧縮機４と、室外送風機５とを有する。室外熱交換器１は、四方弁２及び膨張弁３夫々に接続され、四方弁２には、圧縮機４が接続されている。室外熱交換器１は冷媒による熱交換を行う。圧縮機４は、吸入した冷媒を圧縮して吐出する。圧縮機４は回転圧縮機であり、圧縮力は、動作周波数、即ち回転数に比例する。四方弁２は圧縮機４から吐出、又は圧縮機４に吸入される冷媒の流路を切り替え、膨張弁３は、通過する冷媒の流量を調節し、また減圧する。膨張弁３は開度が０ステップ（全閉）〜４００ステップ（全開）までの４００ステップになっており、ステッピングモータにより段階的に調整される。室外送風機５は、室外熱交換器１に向けて送風する。 The outdoor unit 101 includes an outdoor heat exchanger 1, a four-way valve 2, an expansion valve 3, a compressor 4, and an outdoor fan 5. The outdoor heat exchanger 1 is connected to each of the four-way valve 2 and the expansion valve 3, and the compressor 4 is connected to the four-way valve 2. The outdoor heat exchanger 1 performs heat exchange with a refrigerant. The compressor 4 compresses and discharges the sucked refrigerant. The compressor 4 is a rotary compressor, and the compression force is proportional to the operating frequency, that is, the rotational speed. The four-way valve 2 switches the flow path of the refrigerant discharged from the compressor 4 or sucked into the compressor 4, and the expansion valve 3 adjusts the flow rate of the refrigerant passing therethrough and reduces the pressure. The opening degree of the expansion valve 3 is 400 steps from 0 step (fully closed) to 400 steps (fully open), and is adjusted stepwise by a stepping motor. The outdoor blower 5 blows air toward the outdoor heat exchanger 1.

また、室外熱交換器１には、室外温度を測定する室外温度センサ１０が取り付けられている。圧縮機４には、吐出口側に圧縮機４の吐出温度を測定する吐出センサ４０が取り付けられ、吸入口側に圧縮機４の吸入温度を測定するサクションセンサ４１が取り付けられている。 In addition, an outdoor temperature sensor 10 that measures the outdoor temperature is attached to the outdoor heat exchanger 1. A discharge sensor 40 that measures the discharge temperature of the compressor 4 is attached to the compressor 4 on the discharge port side, and a suction sensor 41 that measures the suction temperature of the compressor 4 is attached to the suction port side.

室外機１０１は、ＣＰＵ（central processing unit ）又はＭＰＵ（microprocessor unit ）を備える室外制御部６を更に有しており、室外制御部６は、四方弁２と、膨張弁３と、圧縮機４と、室外送風機５と、室外温度センサ１０と、吐出センサ４０と、サクションセンサ４１とに接続されている。室外制御部６は、後述するように四方弁２の流路の切替、膨張弁３の開度、圧縮機４の動作及び室外送風機５の動作の制御を行う。また、室外制御部６には、室外温度センサ１０、吐出センサ４０及びサクションセンサ４１夫々が測定した温度が入力される。 The outdoor unit 101 further includes an outdoor control unit 6 including a central processing unit (CPU) or a microprocessor unit (MPU). The outdoor control unit 6 includes a four-way valve 2, an expansion valve 3, and a compressor 4. The outdoor blower 5, the outdoor temperature sensor 10, the discharge sensor 40, and the suction sensor 41 are connected. The outdoor control unit 6 controls the switching of the flow path of the four-way valve 2, the opening degree of the expansion valve 3, the operation of the compressor 4, and the operation of the outdoor blower 5 as described later. In addition, the outdoor controller 6 receives the temperatures measured by the outdoor temperature sensor 10, the discharge sensor 40, and the suction sensor 41.

室内機１０２は、室内熱交換器７と、室内送風機８とを有する。室内熱交換器７は、室外機１０１の四方弁２及び膨張弁３夫々に接続されている。室内熱交換器７は、冷媒による熱交換を行い、室外送風機５は、室内機１０２から室内に向けて送風する。室内熱交換器７には、室内温度を測定する室内温度センサ７０及び室内湿度を測定する湿度センサ７１が取り付けられている。 The indoor unit 102 includes an indoor heat exchanger 7 and an indoor fan 8. The indoor heat exchanger 7 is connected to each of the four-way valve 2 and the expansion valve 3 of the outdoor unit 101. The indoor heat exchanger 7 performs heat exchange with the refrigerant, and the outdoor blower 5 blows air from the indoor unit 102 toward the room. The indoor heat exchanger 7 is provided with a room temperature sensor 70 for measuring the room temperature and a humidity sensor 71 for measuring the room humidity.

室内機１０２は更に室内制御部９と、受信部９０と、記憶部９１とを備える。室内制御部９は、室内送風機８と、室内温度センサ７０と、湿度センサ７１とに接続されている。また、室内制御部９は、ＣＰＵ又はＭＰＵを備え、受信部９０が受信した情報を取得することができ、記憶部９１が記憶する情報を読み出し、また、記憶部９１に演算結果等を記憶させることができる。また、室内制御部９は、室内送風機８の動作の制御等を行う。室内制御部９には、室内温度センサ７０が測定した室内温度及び湿度センサ７１が測定した室内湿度が入力される。更に室内制御部９及び室外制御部６は、通信を行い、温度の測定値、作動命令に関する情報等を交信する。室内制御部９は、室外制御部６に、四方弁２の流路の切替、膨張弁３の開度、圧縮機４の動作及び室外送風機５の動作に係る命令を出力し、室外制御部６は該命令に係る動作を実行する。即ち、室内制御部９は、室外制御部６を介して、四方弁２の流路の切替、膨張弁３の開度、圧縮機４の動作及び室外送風機５の動作を制御する。したがって室内制御部９及び室外制御部６は、膨張弁３の動作を制御する膨張弁制御部及び圧縮機４の動作を制御する圧縮機制御部をなす。 The indoor unit 102 further includes an indoor control unit 9, a receiving unit 90, and a storage unit 91. The indoor control unit 9 is connected to the indoor blower 8, the indoor temperature sensor 70, and the humidity sensor 71. The indoor control unit 9 includes a CPU or MPU, can acquire information received by the receiving unit 90, reads information stored in the storage unit 91, and stores calculation results and the like in the storage unit 91. be able to. The indoor control unit 9 controls the operation of the indoor blower 8 and the like. The room controller 9 receives the room temperature measured by the room temperature sensor 70 and the room humidity measured by the humidity sensor 71. Furthermore, the indoor control unit 9 and the outdoor control unit 6 communicate to exchange measured values of temperature, information on operation commands, and the like. The indoor control unit 9 outputs to the outdoor control unit 6 commands related to the switching of the flow path of the four-way valve 2, the opening degree of the expansion valve 3, the operation of the compressor 4 and the operation of the outdoor blower 5, and the outdoor control unit 6. Performs the operation related to the instruction. That is, the indoor control unit 9 controls the switching of the flow path of the four-way valve 2, the opening degree of the expansion valve 3, the operation of the compressor 4, and the operation of the outdoor blower 5 via the outdoor control unit 6. Therefore, the indoor control unit 9 and the outdoor control unit 6 form an expansion valve control unit that controls the operation of the expansion valve 3 and a compressor control unit that controls the operation of the compressor 4.

受信部９０は、リモートコントローラ１０３が送信した情報を受信し、室内制御部９に入力する。記憶部９１は、ＲＯＭ及びＲＡＭ等を有しており、以下に述べるＬＵＴ（Lookup table）、冷房機能及び暖房機能の設定等、空気調和機１００の動作に関する情報を記憶している。 The receiving unit 90 receives the information transmitted from the remote controller 103 and inputs it to the indoor control unit 9. The storage unit 91 includes a ROM, a RAM, and the like, and stores information related to the operation of the air conditioner 100 such as a LUT (Lookup table), a cooling function, and a heating function setting described below.

記憶部９１は、室外温度及び室内温度に基づいて設定された圧縮機４の目標回転数についてのＬＵＴを記憶している。図２は、圧縮機４の目標回転数についてのＬＵＴの概念図である。図２において、縦軸は、リモートコントローラ１０３の設定温度及び室内温度の差であり、横軸は室外温度である。リモートコントローラ１０３の設定温度及び室内温度の差が大きいほど、また、室外温度が高いほど、目標回転数は大きく設定されている。また、圧縮機４は、所定の初期回転数で作動した後、目標回転数まで回転数が上昇するように制御される。 The storage unit 91 stores an LUT for the target rotational speed of the compressor 4 set based on the outdoor temperature and the indoor temperature. FIG. 2 is a conceptual diagram of the LUT for the target rotational speed of the compressor 4. In FIG. 2, the vertical axis represents the difference between the set temperature of the remote controller 103 and the room temperature, and the horizontal axis represents the outdoor temperature. The larger the difference between the set temperature of the remote controller 103 and the room temperature, and the higher the outdoor temperature, the larger the target rotational speed is set. The compressor 4 is controlled so that the rotational speed increases to the target rotational speed after operating at a predetermined initial rotational speed.

また、記憶部９１は、圧縮機の目標回転数に対する膨張弁３の開度に係る関数を記憶している。記憶部９１は、空気調和機１００の起動時に使用される初期開度に係る関数、及び冷媒の流量が安定する安定開度に係る関数を記憶している。膨張弁３の初期開度には、通常開度及び絞り開度があり、記憶部９１は夫々に係る関数を記憶している。図３は、膨張弁３の開度に係る関数を示すグラフである。図３において、縦軸は、単位をステップとする膨張弁３の開度を示し、横軸は、単位をｒｐｍ（revolution per minute ）とする圧縮機４の目標回転数を示す。細線は通常開度に係る関数を示し、太線は絞り開度に係る関数を示し、一点鎖線は、安定開度に係る関数を示す。通常開度、絞り開度及び安定開度夫々の関数は、傾きが略同一であり、圧縮機４の回転数の増加に伴い、膨張弁３の開度は大きくなっている。また、最も低い目標回転数に対する開度、即ち開度の初期値は通常開度が最も大きく、安定開度が最も小さくなる。したがって、同一の回転数においては、通常開度、絞り開度、安定開度の順に開度は小さくなる。初期開度は、高湿度条件下において、空気調和機１００の起動時に室内熱交換器７への結露を防止するために使用される。圧縮機４の回転数が、初期回転数から目標回転数まで上昇した場合に、膨張弁３は、初期開度から、安定開度となるように制御される。ここで、同一の回転数においては、通常開度から安定開度に絞るよりも絞り開度から安定開度に絞る方が少ないステップ数となるので、安定開度まで絞ることに要する時間が短い。 Moreover, the memory | storage part 91 has memorize | stored the function which concerns on the opening degree of the expansion valve 3 with respect to the target rotation speed of a compressor. The memory | storage part 91 has memorize | stored the function which concerns on the initial opening used at the time of starting of the air conditioner 100, and the function which concerns on the stable opening which the flow volume of a refrigerant | coolant is stabilized. The initial opening of the expansion valve 3 includes a normal opening and a throttle opening, and the storage unit 91 stores a function related to each. FIG. 3 is a graph showing a function related to the opening degree of the expansion valve 3. In FIG. 3, the vertical axis indicates the opening degree of the expansion valve 3 with the unit as a step, and the horizontal axis indicates the target rotational speed of the compressor 4 with the unit as rpm (revolution per minute). A thin line shows a function related to the normal opening, a thick line shows a function related to the throttle opening, and a one-dot chain line shows a function related to the stable opening. The functions of the normal opening, the throttle opening, and the stable opening have substantially the same inclination, and the opening of the expansion valve 3 increases as the rotation speed of the compressor 4 increases. Moreover, the opening with respect to the lowest target rotational speed, that is, the initial value of the opening, has the largest normal opening and the smallest stable opening. Therefore, at the same rotation speed, the opening decreases in the order of the normal opening, the throttle opening, and the stable opening. The initial opening is used to prevent condensation on the indoor heat exchanger 7 when the air conditioner 100 is started under high humidity conditions. When the rotational speed of the compressor 4 increases from the initial rotational speed to the target rotational speed, the expansion valve 3 is controlled so as to have a stable opening from the initial opening. Here, at the same number of rotations, the number of steps from the throttle opening to the stable opening is smaller than the normal opening to the stable opening, so the time required to reduce to the stable opening is short. .

記憶部９１は、更に、空気調和機１００の起動時において、通常開度及び絞り開度のいずれを選択するかについての選択条件を記憶している。図４は、選択条件を示すグラフである。記憶部９１が記憶する室内温度及び室内湿度夫々の閾値に基づいて、通常開度及び絞り開度が選択される。選択条件は冷媒音が発生しやすい条件に設定される。具体的には、記憶部９１は、室内温度が第１閾値Ｘ以下であり、室内湿度が第２閾値Ｙ以下である、即ち図４の斜線領域の範囲を選択条件として記憶している。第１閾値Ｘは１８℃以上であることが好ましく、Ｙは５０％であることが好ましい。 The storage unit 91 further stores a selection condition for selecting which of the normal opening and the throttle opening when the air conditioner 100 is started. FIG. 4 is a graph showing selection conditions. The normal opening degree and the throttle opening degree are selected based on the respective threshold values of the room temperature and the room humidity stored in the storage unit 91. The selection condition is set to a condition where refrigerant noise is likely to occur. Specifically, the storage unit 91 stores, as selection conditions, the range of the hatched area in FIG. 4, that is, the room temperature is the first threshold value X or less and the room humidity is the second threshold value Y or less. The first threshold value X is preferably 18 ° C. or higher, and Y is preferably 50%.

空気調和機１００において、室外熱交換器１、膨張弁３、圧縮機４及び室内熱交換器７は冷凍サイクルをなしている。四方弁２により前記冷凍サイクルにおける冷媒の流路を切り替えることにより、冷房機能及び暖房機能が切り替わる。 In the air conditioner 100, the outdoor heat exchanger 1, the expansion valve 3, the compressor 4, and the indoor heat exchanger 7 form a refrigeration cycle. By switching the refrigerant flow path in the refrigeration cycle by the four-way valve 2, the cooling function and the heating function are switched.

空気調和機１００が冷房を行う場合、気体の冷媒が圧縮機４にて圧縮されて高温高圧となり、四方弁２を介して室外熱交換器１に入り冷却され、低温高圧の液体となる。その後、冷媒は、膨張弁３によりその流量が調節されつつ、減圧されて室内熱交換器７に入り、蒸発して周囲の熱を奪い、低温低圧の気体となって四方弁２を介して圧縮機４に戻る。ここで、室外熱交換器１は、凝縮器として機能し、室内熱交換器７は蒸発器として機能する。 When the air conditioner 100 performs cooling, the gaseous refrigerant is compressed by the compressor 4 to become high temperature and high pressure, enters the outdoor heat exchanger 1 through the four-way valve 2, and is cooled to become low temperature and high pressure liquid. Thereafter, the refrigerant is decompressed while being adjusted in flow rate by the expansion valve 3, enters the indoor heat exchanger 7, evaporates and takes away ambient heat, and becomes a low-temperature and low-pressure gas and is compressed through the four-way valve 2. Return to Machine 4. Here, the outdoor heat exchanger 1 functions as a condenser, and the indoor heat exchanger 7 functions as an evaporator.

空気調和機１００が暖房を行う場合、四方弁２により冷媒の流路が冷房と反対になり、冷媒は、圧縮機４、四方弁２、室内熱交換器７、膨張弁３、室外熱交換器１、四方弁２、圧縮機４の順に流れ、室外熱交換器１は蒸発器として機能し、室内熱交換器７は凝縮器として機能する。 When the air conditioner 100 performs heating, the flow path of the refrigerant is opposite to that of the cooling by the four-way valve 2, and the refrigerant is the compressor 4, the four-way valve 2, the indoor heat exchanger 7, the expansion valve 3, and the outdoor heat exchanger. 1, the four-way valve 2 and the compressor 4 flow in this order, the outdoor heat exchanger 1 functions as an evaporator, and the indoor heat exchanger 7 functions as a condenser.

上述の如く構成された空気調和機１００は、リモートコントローラ１０３の操作によりオンされ、設定された冷房機能又は暖房機能、設定温度等の情報を受信して運転を開始する。受信部９０を介して情報を取得した室内制御部９は、記憶部９１に記憶された情報を読み出し、室外制御部６を介して圧縮機４に作動命令を出力する。圧縮機４が作動することにより冷媒が上述のように流れ、冷房又は暖房が行われる。ここで、空気調和機１００は、冷房の開始において、記憶部９１に記憶されたプログラムに基づき、以下に詳述する初期設定を行い、膨脹弁３の開度を制御する。室内制御部９及び室外制御部６は、膨脹弁３の動作を制御する制御装置をなしており、前記プログラムに係る処理を実行する。なお、該制御装置は、受信部９０及び記憶部９１を含んでいてもよい。また、室内制御部９のみが前記制御装置をなしていてもよい。このとき、室内制御部９は室外制御部６を介さず直接膨張弁３の動作を制御する。 The air conditioner 100 configured as described above is turned on by the operation of the remote controller 103, receives information on the set cooling function or heating function, set temperature, and the like, and starts operation. The indoor control unit 9 that has acquired the information through the receiving unit 90 reads out the information stored in the storage unit 91 and outputs an operation command to the compressor 4 through the outdoor control unit 6. When the compressor 4 is operated, the refrigerant flows as described above, and cooling or heating is performed. Here, the air conditioner 100 controls the opening degree of the expansion valve 3 by performing the initial setting described in detail below based on the program stored in the storage unit 91 at the start of cooling. The indoor control unit 9 and the outdoor control unit 6 form a control device that controls the operation of the expansion valve 3 and executes processing related to the program. The control device may include a receiving unit 90 and a storage unit 91. Moreover, only the indoor control part 9 may comprise the said control apparatus. At this time, the indoor control unit 9 directly controls the operation of the expansion valve 3 without using the outdoor control unit 6.

図５は、室内制御部９による初期設定の手順を示すフローチャートである。室内制御部９は、リモートコントローラ１０３による空気調和機１００の冷房の起動後、次の処理を行うことにより、空気調和機１００の冷房の初期設定を行う。 FIG. 5 is a flowchart showing an initial setting procedure by the indoor control unit 9. The indoor control unit 9 performs initial setting of the cooling of the air conditioner 100 by performing the following processing after the remote controller 103 starts the cooling of the air conditioner 100.

室内制御部９は、受信部９０が受信したリモートコントローラ１０３の設定温度を取得し、室外制御部６を介して、室外温度センサ１０が測定した室外温度を取得し、室内温度センサ７０から室内温度を、湿度センサ７１から室内湿度を取得する（Ｓ１）。室内制御部９は、取得した設定温度及び室内温度の差を算出する（Ｓ２）。その後、室内制御部９は、算出した差及び取得した室外温度に基づき、ＬＵＴを参照して圧縮機４の目標回転数を設定する（Ｓ３）。 The indoor control unit 9 acquires the set temperature of the remote controller 103 received by the receiving unit 90, acquires the outdoor temperature measured by the outdoor temperature sensor 10 via the outdoor control unit 6, and receives the indoor temperature from the indoor temperature sensor 70. The indoor humidity is acquired from the humidity sensor 71 (S1). The room controller 9 calculates the difference between the acquired set temperature and room temperature (S2). Thereafter, the indoor control unit 9 sets the target rotational speed of the compressor 4 with reference to the LUT based on the calculated difference and the acquired outdoor temperature (S3).

その後、室内制御部９は、室内温度及び室内湿度が、記憶部９１が記憶する選択条件に該当するか否かを判定する（Ｓ４）。即ち、室内制御部９は、室内温度が第１閾値Ｘ以下であり、かつ湿度が第２閾値Ｙ以下であるか否かを判定する。 Thereafter, the indoor control unit 9 determines whether the room temperature and the room humidity meet the selection conditions stored in the storage unit 91 (S4). That is, the indoor control unit 9 determines whether the indoor temperature is equal to or lower than the first threshold value X and the humidity is equal to or lower than the second threshold value Y.

室内制御部９は、室内温度及び室内湿度が、記憶部９１が記憶する選択条件に該当すると判定した場合（Ｓ４：ＹＥＳ）、膨張弁３を絞り開度に設定し（Ｓ５）、初期設定の動作を終了する。また、室内制御部９は、室内温度及び室内湿度が、選択条件に該当しないと判定した場合（Ｓ４：ＮＯ）、膨張弁３を通常開度に設定し（Ｓ６）、初期設定の動作を終了する。 When it is determined that the room temperature and the room humidity correspond to the selection conditions stored in the storage unit 91 (S4: YES), the indoor control unit 9 sets the expansion valve 3 to the throttle opening (S5), and performs the initial setting. End the operation. If the room temperature and the room humidity are determined not to satisfy the selection conditions (S4: NO), the indoor control unit 9 sets the expansion valve 3 to the normal opening (S6) and ends the initial setting operation. To do.

初期設定を行った後、室内制御部９は、室外制御部６を介して、膨張弁３を初期設定で設定した開度に制御し、初期回転数で圧縮機４の作動を開始させる。また、室内制御部９は、室内送風機８を作動させ、室外制御部６を介して室外送風機５を作動させる。その後、室内制御部９は、圧縮機４の回転数を初期設定で設定した目標回転数まで上昇させ、膨張弁３を安定開度まで絞る。圧縮機４から吐出された冷媒が冷凍サイクルを経ることにより、空気調和機１００による室内の冷房が行われる。 After performing the initial setting, the indoor control unit 9 controls the expansion valve 3 to the opening set by the initial setting via the outdoor control unit 6 and starts the operation of the compressor 4 at the initial rotational speed. Further, the indoor control unit 9 operates the indoor blower 8 and operates the outdoor blower 5 via the outdoor control unit 6. Thereafter, the indoor control unit 9 raises the rotational speed of the compressor 4 to the target rotational speed set in the initial setting, and throttles the expansion valve 3 to the stable opening degree. The refrigerant discharged from the compressor 4 passes through the refrigeration cycle, so that the air conditioner 100 cools the room.

ここで、空気調和機１００の冷房の起動時においては、冷媒の液化作用が不安定なため、室外熱交換器１及び膨張弁３の間において、気体及び液体が混合している。気体及び液体が混合した冷媒が安定開度よりも大きい開度の膨張弁３を通過する際、不快な音、いわゆる冷媒音が発生するという問題が生じる。安定開度においては、冷媒は膨張弁３を通過する際に略液体となっており、冷媒音は発生し難い。 Here, when the cooling of the air conditioner 100 is started, the liquefaction effect of the refrigerant is unstable, so that gas and liquid are mixed between the outdoor heat exchanger 1 and the expansion valve 3. When the refrigerant mixed with gas and liquid passes through the expansion valve 3 having an opening larger than the stable opening, there arises a problem that unpleasant noise, so-called refrigerant noise is generated. At the stable opening, the refrigerant is substantially liquid when passing through the expansion valve 3, and the refrigerant noise hardly occurs.

上記の構成によれば、冷媒音が発生しやすい室内温度及び室内湿度条件下において、膨張弁３の初期開度を絞り開度に制御し、圧縮機４の回転数が目標回転数まで上昇した場合に、初期開度から安定開度まで膨張弁３の開度を絞る時間を短縮している。これにより、冷媒音が発生する時間を短縮し、冷媒音を抑制することができる。また、冷媒音は、時間の経過に伴って大きくなるが、冷媒音が発生する時間を短縮することにより、冷媒音が小さい時点で冷媒音の発生を終了でき、冷媒音の大きさを抑制することができる。 According to the above configuration, the initial opening degree of the expansion valve 3 is controlled to the throttle opening degree under the room temperature and room humidity conditions in which refrigerant noise is likely to occur, and the rotation speed of the compressor 4 has increased to the target rotation speed. In this case, the time for reducing the opening of the expansion valve 3 from the initial opening to the stable opening is shortened. Thereby, the time which a refrigerant | coolant sound generate | occur | produces can be shortened and a refrigerant | coolant sound can be suppressed. In addition, the refrigerant sound increases with time, but by reducing the time during which the refrigerant sound is generated, the generation of the refrigerant sound can be terminated when the refrigerant sound is low, thereby suppressing the size of the refrigerant sound. be able to.

更に、膨張弁３を速く安定開度まで絞ることにより、空気調和機１００の使用者の快適性を向上させることができ、また、膨張弁３が安定開度である場合、電力消費の効率が良いので、空気調和機１００の冷房における電力消費を低減することができる。なお、室内制御部９は、湿度が第２閾値Ｙ（５０％）より大きい場合、膨張弁３を絞り開度に設定しないので、室内交換機７における結露の問題は生じない。 Furthermore, the comfort of the user of the air conditioner 100 can be improved by quickly narrowing the expansion valve 3 to a stable opening degree. Also, when the expansion valve 3 has a stable opening degree, the power consumption efficiency is improved. Since it is good, the power consumption in the cooling of the air conditioner 100 can be reduced. The indoor control unit 9 does not set the expansion valve 3 to the throttle opening when the humidity is greater than the second threshold Y (50%), so that the problem of condensation in the indoor exchanger 7 does not occur.

なお、室内制御部９は、室外制御部６を介さずに、四方弁２の流路の切替、膨張弁３の開度、圧縮機４の動作及び室外送風機５の動作を直接制御してもよい。このとき、室内制御部９のみが膨脹弁制御部及び圧縮機制御部をなす。また、室外制御部６及び室内制御部９を一つの制御部として、室内機１０２内に設け、前記一つの制御部が上記の動作を行ってもよい。このとき前記一つの制御部が膨脹弁制御部及び圧縮機制御部をなす。 The indoor control unit 9 may directly control the switching of the flow path of the four-way valve 2, the opening degree of the expansion valve 3, the operation of the compressor 4, and the operation of the outdoor blower 5 without using the outdoor control unit 6. Good. At this time, only the indoor controller 9 serves as an expansion valve controller and a compressor controller. Further, the outdoor control unit 6 and the indoor control unit 9 may be provided in the indoor unit 102 as one control unit, and the one control unit may perform the above operation. At this time, the one control unit forms an expansion valve control unit and a compressor control unit.

（実施の形態２）
実施の形態２の空気調和機１００は、実施の形態１と同様の構成をなすが、冷房の初期設定が異なる。実施の形態２に係る空気調和機１００の構成について、実施の形態１と同様な構成については、同一の符号を付してその詳細な説明を省略する。 (Embodiment 2)
The air conditioner 100 of the second embodiment has the same configuration as that of the first embodiment, but the initial setting for cooling is different. About the structure of the air conditioner 100 which concerns on Embodiment 2, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

記憶部９１は、実施の形態１と同様に、膨張弁３の初期開度に係る関数として通常開度に係る関数及び絞り開度に係る関数を記憶し、安定開度に係る関数を記憶している。図６は、実施の形態２における膨張弁３の開度に係る関数を示すグラフである。図６においては、図３と同様に、縦軸は膨張弁３の開度を示し、横軸は圧縮機４の目標回転数を示す。細線は通常開度に係る関数を示し、太線は実施の形態２における絞り開度に係る関数を示し、一点鎖線は、安定開度に係る関数を示す。また、点線は実施の形態１における絞り開度に係る関数を示している。実施の形態２に係る絞り開度では、所定の目標回転数以上の場合の傾きは、図６の点線に示す実施の形態１における絞り開度に係る関数の傾きより小さい。したがって、実施の形態２における絞り開度は、圧縮機４が所定の回転数以上である場合、実施の形態１に比べて圧縮機４の回転数が大きくなるにしたがって安定開度により近い値となる。即ち、絞り開度は、通常開度との差が目標回転数の大小に応じて大小となるように設定されている。なお、所定の回転数以下の場合にも同様に、実施の形態１の絞り開度に係る関数の傾きよりも小さくしてもよい。 Similarly to the first embodiment, the storage unit 91 stores a function related to the normal opening and a function related to the throttle opening as a function related to the initial opening of the expansion valve 3, and stores a function related to the stable opening. ing. FIG. 6 is a graph showing a function related to the opening degree of the expansion valve 3 in the second embodiment. In FIG. 6, as in FIG. 3, the vertical axis indicates the opening degree of the expansion valve 3, and the horizontal axis indicates the target rotational speed of the compressor 4. A thin line shows a function related to the normal opening, a thick line shows a function related to the throttle opening in the second embodiment, and a one-dot chain line shows a function related to the stable opening. A dotted line indicates a function related to the throttle opening in the first embodiment. In the throttle opening according to the second embodiment, the slope when the rotation speed is equal to or higher than the predetermined target rotational speed is smaller than the slope of the function related to the throttle opening in the first embodiment shown by the dotted line in FIG. Therefore, the throttle opening in the second embodiment is closer to the stable opening as the rotation speed of the compressor 4 is larger than that in the first embodiment when the compressor 4 is equal to or higher than the predetermined rotation speed. Become. In other words, the throttle opening is set so that the difference from the normal opening becomes larger or smaller depending on the target rotational speed. Similarly, when the rotational speed is equal to or lower than the predetermined rotational speed, the slope of the function related to the throttle opening degree of the first embodiment may be made smaller.

実施の形態２においては、実施の形態１の選択条件に加え、室外温度も考慮して、絞り開度に設定する。図７は、実施の形態２における膨張弁３の開度を決定する選択条件を示すグラフである。膨張弁３は、室外温度が第３閾値Ｚ以上であり、湿度がＹ以下である場合にも絞り開度に設定される。したがって、図７の斜線領域内に該当した場合、絞り開度に設定する。Ｚは２１℃以上であることが好ましく、このとき冷媒音が発生しやすくなる。ここで、図７は、Ｘ＞Ｚの場合を示しているが、Ｘの値は、Ｚの値以下であってもよい。 In the second embodiment, the throttle opening is set in consideration of the outdoor temperature in addition to the selection conditions of the first embodiment. FIG. 7 is a graph showing selection conditions for determining the opening degree of the expansion valve 3 in the second embodiment. The expansion valve 3 is set to the throttle opening when the outdoor temperature is equal to or higher than the third threshold value Z and the humidity is equal to or lower than Y. Therefore, when it falls within the shaded area in FIG. 7, the throttle opening is set. Z is preferably 21 ° C. or higher. At this time, refrigerant noise is likely to occur. Here, FIG. 7 shows a case where X> Z, but the value of X may be equal to or less than the value of Z.

記憶部９１は、更に膨張弁３の開度を初期開度から安定開度に絞る速度として、第１速度と、該第１速度よりも速く絞る第２速度を記憶している。ここで、膨張弁３は、室内温度センサ７０及びサクションセンサ４１夫々が測定した温度の差と目標とする温度差との差を室内制御部９が積算していき、積算値が初期開度に対応する所定値に達した場合に所定ステップ絞られる。積算値は膨張弁３を絞るごとにリセットされ、膨張弁３は積算を繰り返していくことにより安定開度まで絞られる。これにより、膨張弁３を絞る速度は、前記所定値の大小により決定されることとなる。したがって、第１速度における所定値は、第２速度における所定値よりも大きく設定されている。
なお、膨張弁３は、所定時間が経過するごとに所定ステップ絞ることを繰り返していき、安定開度に到達させるようにしてもよい。この場合所定時間の大小により、第１速度及び第２速度の速さが決定される。 The storage unit 91 further stores a first speed and a second speed at which the expansion valve 3 is throttled faster than the first speed as a speed at which the opening degree of the expansion valve 3 is reduced from the initial opening degree to the stable opening degree. Here, in the expansion valve 3, the indoor control unit 9 accumulates the difference between the temperature difference measured by the indoor temperature sensor 70 and the suction sensor 41 and the target temperature difference, and the accumulated value becomes the initial opening degree. When the corresponding predetermined value is reached, the predetermined step is narrowed down. The integrated value is reset every time the expansion valve 3 is throttled, and the expansion valve 3 is throttled to a stable opening degree by repeating the integration. Thereby, the speed | rate which throttles the expansion valve 3 will be determined by the magnitude of the said predetermined value. Therefore, the predetermined value at the first speed is set larger than the predetermined value at the second speed.
In addition, the expansion valve 3 may be made to reach a stable opening degree by repeating a predetermined step every time a predetermined time elapses. In this case, the speeds of the first speed and the second speed are determined depending on the magnitude of the predetermined time.

図８は、室内制御部９による初期設定の手順を示すフローチャートである。室内制御部９は、空気調和機１００の冷房の起動後、次の処理を行う。 FIG. 8 is a flowchart showing an initial setting procedure by the indoor control unit 9. The indoor control unit 9 performs the following process after the cooling of the air conditioner 100 is started.

室内制御部９は、受信部９０が受信したリモートコントローラ１０３の設定温度を取得し、室外制御部６を介して、室外温度センサ１０が測定した室外温度を取得し、室内温度センサ７０から室内温度を、湿度センサ７１から室内湿度を取得する（Ｓ１１）。室内制御部９は、取得した設定温度及び室内温度の差を算出する（Ｓ１２）。その後、室内制御部９は、算出した差及び取得した室外温度に基づき、ＬＵＴを参照して圧縮機４の目標回転数を設定する（Ｓ１３）。 The indoor control unit 9 acquires the set temperature of the remote controller 103 received by the receiving unit 90, acquires the outdoor temperature measured by the outdoor temperature sensor 10 via the outdoor control unit 6, and receives the indoor temperature from the indoor temperature sensor 70. The indoor humidity is acquired from the humidity sensor 71 (S11). The room controller 9 calculates the difference between the acquired set temperature and room temperature (S12). Thereafter, the indoor control unit 9 sets the target rotational speed of the compressor 4 with reference to the LUT based on the calculated difference and the acquired outdoor temperature (S13).

その後、室内制御部９は、室外温度、室内温度及び室内湿度が、記憶部９１が記憶する選択条件に該当するか否かを判定する（Ｓ１４）。即ち、室内制御部９は、室内温度が第１閾値Ｘ以下又は室外温度が第２閾値Ｚ以上であり、かつ湿度が第２閾値Ｙ以下であるか否かを判定する。 Thereafter, the indoor control unit 9 determines whether the outdoor temperature, the indoor temperature, and the indoor humidity satisfy the selection conditions stored in the storage unit 91 (S14). That is, the indoor control unit 9 determines whether the indoor temperature is equal to or lower than the first threshold value X, the outdoor temperature is equal to or higher than the second threshold value Z, and the humidity is equal to or lower than the second threshold value Y.

室内制御部９は、室外温度、室内温度及び室内湿度が、選択条件に該当すると判定した場合（Ｓ１４：ＹＥＳ）、膨張弁３を絞り開度に設定し（Ｓ１５）、また、第２速度を設定して（Ｓ１６）、初期設定の動作を終了する。また、室内制御部９は、室外温度、室内温度及び室内湿度が、選択条件に該当しないと判定した場合（Ｓ１４：ＮＯ）、膨張弁３を通常開度に設定し（Ｓ１７）、また、第１速度を設定して（Ｓ１８）、初期設定の動作を終了する。 When it is determined that the outdoor temperature, the room temperature, and the room humidity meet the selection conditions (S14: YES), the indoor control unit 9 sets the expansion valve 3 to the throttle opening (S15), and sets the second speed. After setting (S16), the initial setting operation is terminated. Further, when the indoor control unit 9 determines that the outdoor temperature, the room temperature, and the room humidity do not meet the selection conditions (S14: NO), the indoor control unit 9 sets the expansion valve 3 to the normal opening (S17), and One speed is set (S18), and the initial setting operation is terminated.

初期設定を行った後、室内制御部９は、室外制御部６を介して膨張弁３を初期設定で設定した開度に制御し、初期回転数で圧縮機４の作動を開始させる。また、室内制御部９は、室内送風機８を作動させ、室外制御部６を介して室外送風機５を作動させる。その後、室内制御部９は、圧縮機４の回転数を初期設定で設定した目標回転数まで上昇させ、初期設定で設定した絞り速度で膨張弁３を安定開度まで絞る。圧縮機４から吐出された冷媒が冷凍サイクルを経ることにより、空気調和機１００による室内の冷房が行われる。 After performing the initial setting, the indoor control unit 9 controls the expansion valve 3 to the opening set by the initial setting via the outdoor control unit 6 and starts the operation of the compressor 4 at the initial rotational speed. Further, the indoor control unit 9 operates the indoor blower 8 and operates the outdoor blower 5 via the outdoor control unit 6. Thereafter, the indoor control unit 9 increases the rotational speed of the compressor 4 to the target rotational speed set in the initial setting, and throttles the expansion valve 3 to the stable opening at the throttle speed set in the initial setting. The refrigerant discharged from the compressor 4 passes through the refrigeration cycle, so that the air conditioner 100 cools the room.

上記の構成によれば、冷媒音が発生しやすい条件下において、膨張弁の開度を絞り開度に制御して、目標回転数まで上昇した場合に安定開度まで開度を絞る時間を短縮している。これにより、冷媒音が発生する時間を短縮し、冷媒音を抑制することができる。また、冷媒音が発生しやすい条件に室外温度を含めることにより、より確実に冷媒音を抑制することができる。 According to the above configuration, under conditions where refrigerant noise is likely to occur, the opening degree of the expansion valve is controlled to the throttle opening degree, so that the time required to reduce the opening degree to the stable opening degree when the target rotational speed is increased is shortened. doing. Thereby, the time which a refrigerant | coolant sound generate | occur | produces can be shortened and a refrigerant | coolant sound can be suppressed. In addition, by including the outdoor temperature in a condition where refrigerant noise is likely to occur, the refrigerant noise can be more reliably suppressed.

更に、圧縮機の目標回転数が大きい場合、即ち、比較的膨張弁３の開度が大きい場合に、絞り開度において、圧縮機の目標回転数が大きくなるほど、開度を安定開度に近づけている。したがって、膨張弁３の開度が大きく冷媒音が発生しやすい場合に、より速く膨張弁３を安定開度まで絞ることができ、冷媒音を抑制することができる。 Furthermore, when the target rotational speed of the compressor is large, that is, when the opening degree of the expansion valve 3 is relatively large, the opening degree approaches the stable opening degree as the target rotational speed of the compressor increases at the throttle opening degree. ing. Therefore, when the opening degree of the expansion valve 3 is large and refrigerant noise is likely to be generated, the expansion valve 3 can be throttled to a stable opening degree more quickly, and the refrigerant noise can be suppressed.

更に、冷媒音が発生しやすい条件下において、第２速度で膨張弁３を速く安定開度まで絞るので、より冷媒音が発生する時間を短縮でき、冷媒音を抑制することができる。 Furthermore, since the expansion valve 3 is quickly squeezed to the stable opening at the second speed under conditions where refrigerant noise is likely to occur, the time during which refrigerant noise is generated can be further shortened, and refrigerant noise can be suppressed.

また、冷媒音が発生する時間を短縮することにより、冷媒音が小さい時点で冷媒音の発生を終了でき、冷媒音の大きさを抑制することができる。 Further, by shortening the time for generating the refrigerant sound, the generation of the refrigerant sound can be terminated when the refrigerant sound is small, and the magnitude of the refrigerant sound can be suppressed.

（実施の形態３）
実施の形態３は、室内機が複数存在する場合に関する。図９は、実施の形態３に係る空気調和機１００の構成を示す概略図である。実施の形態３に係る空気調和機１００の構成について、実施の形態１及び実施の形態２と同様な構成については、同一の符号を付してその詳細な説明を省略する。実施の形態３に係る空気調和機１００は、室外機１０１、二つの室内機１０２，１０２及び二つのリモートコントローラ１０３，１０３を備える。また、膨張弁３は、室内機１０２、１０２夫々に設けられている。 (Embodiment 3)
The third embodiment relates to a case where there are a plurality of indoor units. FIG. 9 is a schematic diagram showing the configuration of the air conditioner 100 according to Embodiment 3. As shown in FIG. About the structure of the air conditioner 100 which concerns on Embodiment 3, about the structure similar to Embodiment 1 and Embodiment 2, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted. An air conditioner 100 according to Embodiment 3 includes an outdoor unit 101, two indoor units 102 and 102, and two remote controllers 103 and 103. The expansion valve 3 is provided in each of the indoor units 102 and 102.

また、空気調和機１００は、冷媒の流路における分離及び合流を行う二つの分岐器２００、２０１を備える。分岐器２００には、室外熱交換器１が接続されており、膨張弁３、３が並列に接続されている。分岐器２０１には、四方弁２が接続されており、二つの室内熱交換器７、７が、分岐器２０１に並列に接続されている。分岐器２００、２０１の動作は、室外制御部６により制御される。 The air conditioner 100 also includes two branching units 200 and 201 that perform separation and merging in the refrigerant flow path. The outdoor heat exchanger 1 is connected to the branching device 200, and the expansion valves 3 and 3 are connected in parallel. A four-way valve 2 is connected to the branching device 201, and two indoor heat exchangers 7 and 7 are connected to the branching device 201 in parallel. The operations of the branching devices 200 and 201 are controlled by the outdoor control unit 6.

二つの室内機１０２、１０２においては、実施の形態１と同様に記憶部９１が記憶するＬＵＴに基づいて目標回転数を設定する。ここで、室内機１０２の一方のみが起動された場合は、該一方の室内機１０２において設定された目標回転数に基づき、室内制御部９が室外制御部６を介して、圧縮機４を作動させる。室内機１０２、１０２両方が起動された場合は、夫々において設定された目標回転数が室内制御部９、９から室外制御部６に入力される。室外制御部６は、入力された目標回転数を合算し、合算した値に基づいて、圧縮機４を作動させる。このとき、膨張弁３、３は、夫々の室内機１０２において設定された目標回転数に基づき、実施の形態１と同様に開度が制御される。また、室外制御部６は、分岐器２００、２０１の動作を制御することにより、室内機１０２、１０２への冷媒の流量を調節する。 In the two indoor units 102 and 102, the target rotation speed is set based on the LUT stored in the storage unit 91 as in the first embodiment. Here, when only one of the indoor units 102 is activated, the indoor control unit 9 operates the compressor 4 via the outdoor control unit 6 based on the target rotational speed set in the one indoor unit 102. Let When both the indoor units 102 and 102 are activated, the target rotational speed set in each is input from the indoor control units 9 and 9 to the outdoor control unit 6. The outdoor control unit 6 adds the input target rotation speeds, and operates the compressor 4 based on the added values. At this time, the opening degree of the expansion valves 3 and 3 is controlled in the same manner as in the first embodiment based on the target rotational speed set in each indoor unit 102. Further, the outdoor control unit 6 adjusts the flow rate of the refrigerant to the indoor units 102 and 102 by controlling the operations of the branching units 200 and 201.

なお、室内制御部９、９が交信を行い、いずれか一方が、室内機１０２、１０２夫々において設定された目標回転数を合算し、室外制御部６を介さずに、圧縮機４を作動させてもよい。また、室外制御部６及び一方の室内制御部９を一つの制御部として、該一方の室内制御部９に係る室内機１０２内に設け、前記一つの制御部が、上記動作を行ってもよい。 The indoor control units 9 and 9 communicate with each other, and one of them adds the target rotation speeds set in the indoor units 102 and 102, respectively, and operates the compressor 4 without passing through the outdoor control unit 6. May be. The outdoor control unit 6 and one indoor control unit 9 may be provided as one control unit in the indoor unit 102 related to the one indoor control unit 9, and the one control unit may perform the above operation. .

空気調和機１００が冷房運転している場合、圧縮機４から吐出された冷媒は、分岐器２００を通過する際に分離され、分離された冷媒は、夫々、膨張弁３、３を通過して、室内熱交換器７、７に入る。室内熱交換器７、７を通過した冷媒は、分岐器２０１にて合流し、四方弁２を通過して圧縮機４に吸入される。 When the air conditioner 100 is in cooling operation, the refrigerant discharged from the compressor 4 is separated when passing through the branching device 200, and the separated refrigerant passes through the expansion valves 3 and 3, respectively. , Enter the indoor heat exchanger 7,7. The refrigerant that has passed through the indoor heat exchangers 7 and 7 joins at the branching device 201, passes through the four-way valve 2, and is sucked into the compressor 4.

室内制御部９、９は、夫々、記憶部９１が記憶するＬＵＴ、膨張弁３の開度に係る関数、選択条件に従って、膨張弁３の開度を設定する初期設定を実施の形態２と同様に行う。実施の形態３においては、圧縮機４の回転数を、目標回転数を合算した値まで上昇させた後、初期設定で設定した絞り速度で膨張弁３を安定開度まで絞る。 The indoor control units 9 and 9 perform the initial setting for setting the opening degree of the expansion valve 3 in accordance with the LUT stored in the storage unit 91, the function related to the opening degree of the expansion valve 3, and the selection conditions, respectively, as in the second embodiment. To do. In the third embodiment, the rotation speed of the compressor 4 is increased to a value obtained by adding the target rotation speeds, and then the expansion valve 3 is throttled to a stable opening at the throttle speed set in the initial setting.

上記の構成によれば、室内機１０２、１０２の膨張弁３、３における冷媒音を抑制しつつ、室内機１０２、１０２により、二つの室内を冷却することができる。なお、室内機の数は、二つに限られず、三つ以上であってもよい。 According to said structure, two indoors can be cooled with the indoor units 102 and 102, suppressing the refrigerant | coolant sound in the expansion valves 3 and 3 of the indoor units 102 and 102. FIG. Note that the number of indoor units is not limited to two, and may be three or more.

本発明に係る空気調和機（１００）は、室外熱交換器（１）及び室内熱交換器（７）の間に配され、冷媒の流量を調節する調節弁（３）と、該調節弁（３）の開度を制御する調節弁制御部（６、９）と、室内温度を測定する室内温度測定部（７０）と、室内湿度を測定する湿度測定部（７１）とを備え、前記調節弁制御部（６、９）は、前記室内温度測定部（７０）が測定した室内温度が第１閾値よりも高い場合、又は前記湿度測定部（７１）が測定した室内湿度が第２閾値よりも高い場合、前記調節弁（３）を第１開度に制御し、前記室内温度が前記第１閾値以下であり、かつ前記室内湿度が前記第２閾値以下である場合、前記調節弁（３）を前記第１開度よりも開度が小さい第２開度に制御することを特徴とする。 An air conditioner (100) according to the present invention is arranged between an outdoor heat exchanger (1) and an indoor heat exchanger (7), and adjusts the flow rate of refrigerant, the adjusting valve (3) 3) comprising a control valve control section (6, 9) for controlling the opening degree, an indoor temperature measurement section (70) for measuring the room temperature, and a humidity measurement section (71) for measuring the room humidity, When the indoor temperature measured by the indoor temperature measuring unit (70) is higher than the first threshold, or the indoor humidity measured by the humidity measuring unit (71) is lower than the second threshold. The control valve (3) is controlled to the first opening, and the control valve (3) is controlled when the room temperature is not more than the first threshold and the room humidity is not more than the second threshold. ) Is controlled to a second opening that is smaller than the first opening.

本発明によれば、第１閾値及び第２閾値を冷媒音が発生しやすい条件に設定し、該条件に該当する場合に、調節弁（３）を第１開度よりも開度が小さい第２開度に制御し、該当しない場合に、調節弁（３）を第１開度に制御することができる。 According to the present invention, the first threshold value and the second threshold value are set to conditions under which refrigerant noise is likely to be generated, and when this condition is met, the opening of the control valve (3) is smaller than the first opening degree. The control valve (3) can be controlled to the first opening when the opening is controlled to 2 and not applicable.

したがって、起動時に、調節弁（３）を第２開度に制御した後、冷媒の流量が安定するまで開度を絞る場合において、開度を絞る時間を短縮することができる。 Therefore, when the opening degree is reduced until the flow rate of the refrigerant is stabilized after the control valve (3) is controlled to the second opening degree at the time of activation, the time for reducing the opening degree can be shortened.

これにより、冷媒音が発生する時間を短縮し、冷媒音を抑制することができる。また、冷媒音は、時間の経過に伴って大きくなるが、冷媒音が発生する時間を短縮することにより、冷媒音が小さい時点で冷媒音の発生を終了でき、冷媒音の大きさを抑制することができる。更に、調節弁（３）を速く絞ることにより、空気調和機（１００）の使用者の快適性を向上させることができる。 Thereby, the time which a refrigerant | coolant sound generate | occur | produces can be shortened and a refrigerant | coolant sound can be suppressed. In addition, the refrigerant sound increases with time, but by reducing the time during which the refrigerant sound is generated, the generation of the refrigerant sound can be terminated when the refrigerant sound is low, thereby suppressing the size of the refrigerant sound. be able to. Furthermore, the comfort of the user of the air conditioner (100) can be improved by quickly closing the control valve (3).

本発明に係る空気調和機（１００）は、室外温度を測定する室外温度測定部（１０）を更に備え、前記調節弁制御部（６、９）は、更に、前記室外温度測定部（１０）が測定した室外温度が第３閾値以上であり、かつ前記室内湿度が前記第２閾値以下である場合には、前記調節弁（３）を前記第２開度に制御することを特徴とする。 The air conditioner (100) according to the present invention further includes an outdoor temperature measurement unit (10) for measuring an outdoor temperature, and the control valve control unit (6, 9) further includes the outdoor temperature measurement unit (10). When the outdoor temperature measured by is equal to or higher than a third threshold value and the indoor humidity is equal to or lower than the second threshold value, the control valve (3) is controlled to the second opening degree.

本発明によれば、室外温度を冷媒音が発生しやすい条件に含めることができ、より確実に冷媒音を抑制することができる。 According to the present invention, the outdoor temperature can be included in the condition where the refrigerant noise is likely to be generated, and the refrigerant noise can be more reliably suppressed.

本発明に係る空気調和機（１００）は、圧縮機（４）と、室内温度及び室外温度に基づいて設定された目標回転数に基づき、前記圧縮機（４）の動作を制御する圧縮機制御部（６、９）とを更に備え、前記第１開度及び第２開度は、前記目標回転数に対応して設定されており、前記第２開度は、前記第１開度との差が前記目標回転数の大小に応じて大小となるように設定されていることを特徴とする。 The air conditioner (100) according to the present invention includes a compressor control that controls the operation of the compressor (4) based on the compressor (4) and a target rotational speed set based on the indoor temperature and the outdoor temperature. Part (6, 9), wherein the first opening and the second opening are set corresponding to the target rotational speed, and the second opening is equal to the first opening. The difference is set so as to become larger or smaller in accordance with the target rotational speed.

本発明によれば、圧縮機（４）の目標回転数が大きいほど、即ち、調節弁（３）の開度が大きくなるほど、第２開度は、前記第１開度との差が大きい。したがって、調節弁（３）の開度が大きく冷媒音が発生しやすい場合に、より速くに冷媒音を抑制することができる。 According to the present invention, the greater the target rotational speed of the compressor (4), that is, the greater the opening of the control valve (3), the greater the difference between the second opening and the first opening. Therefore, when the opening of the control valve (3) is large and refrigerant noise is likely to occur, the refrigerant noise can be suppressed more quickly.

本発明に係る空気調和機（１００）は、前記圧縮機制御部（６、９）は、前記圧縮機（４）を作動開始から所定の回転数で作動させた後、前記目標回転数に基づいて回転数を上昇させて前記圧縮機（４）を作動させ、前記調節弁制御部（６、９）は、前記圧縮機制御部（６、９）が前記圧縮機（４）の回転数を上昇させた後、前記調節弁（３）を前記第１開度としている場合、第１速度で、前記第２開度より小さい第３開度まで絞り、前記調節弁（３）を前記第２開度としている場合、前記第１速度よりも速い第２速度で前記第３開度まで絞ることを特徴とする。 In the air conditioner (100) according to the present invention, the compressor control unit (6, 9) operates the compressor (4) at a predetermined rotational speed from the start of operation, and then, based on the target rotational speed. The compressor (4) is operated by increasing the rotational speed, and the control valve controller (6, 9) is configured so that the compressor controller (6, 9) determines the rotational speed of the compressor (4). When the control valve (3) is set to the first opening after the increase, the control valve (3) is throttled to a third opening smaller than the second opening at the first speed, and the control valve (3) is moved to the second opening. When it is set as the opening degree, it restrict | squeezes to the said 3rd opening degree by the 2nd speed faster than the said 1st speed.

本発明によれば、冷媒音が発生しやすい条件下において、第２速度で調節弁（３）を第３開度まで絞るので、第３開度で冷媒の流量が安定するように設定した場合に、より冷媒音が発生する時間を短縮でき、冷媒音を抑制することができる。また、冷媒音が発生する時間を短縮することにより、冷媒音が小さい時点で冷媒音の発生を終了でき、冷媒音の大きさを抑制することができる。また、調節弁（３）が第３開度である場合、電力消費の効率が良いので、早く第３開度まで絞ることにより、空気調和機（１００）の電力消費を低減することができる。 According to the present invention, when the control valve (3) is throttled to the third opening degree at the second speed under the condition that the refrigerant noise is likely to be generated, the refrigerant flow rate is set to be stable at the third opening degree. In addition, the time for generating the refrigerant noise can be further shortened, and the refrigerant noise can be suppressed. Further, by shortening the time for generating the refrigerant sound, the generation of the refrigerant sound can be terminated when the refrigerant sound is small, and the magnitude of the refrigerant sound can be suppressed. Further, when the control valve (3) is at the third opening, the power consumption efficiency is good. Therefore, the power consumption of the air conditioner (100) can be reduced by narrowing down to the third opening quickly.

本発明に係る空気調和機（１００）は、前記室外熱交換器（１）には複数の室内熱交換器（１０２、１０２）が接続されていることを特徴とする。 The air conditioner (100) according to the present invention is characterized in that a plurality of indoor heat exchangers (102, 102) are connected to the outdoor heat exchanger (1).

本発明によれば、複数の室内熱交換器（７、７）により、複数の室内を冷却することができる。 According to the present invention, a plurality of rooms can be cooled by the plurality of indoor heat exchangers (7, 7).

本発明に係るプログラムは、室外熱交換器（１）及び室内熱交換器（７）の間に配され、冷媒の流量を調節する調節弁の動作を制御する制御装置（６、９）に、前記室内温度及び前記室内湿度を取得し、前記室内温度が第１閾値以下であるか否か、及び前記室内湿度が第２閾値以下であるか否かを判定し、室内温度が第１閾値以下でないと判定した場合、又は室内湿度が第２閾値以下でないと判定した場合、前記調節弁（３）を第１開度に制御し、前記室内温度が前記第１閾値以下であると判定し、かつ前記室内湿度が前記第２閾値以下であると判定した場合、前記調節弁（３）を前記第１開度よりも開度が小さい第２開度に制御する処理を実行させることを特徴とする。 The program according to the present invention is arranged between the outdoor heat exchanger (1) and the indoor heat exchanger (7), and controls the operation of a regulating valve that adjusts the flow rate of the refrigerant (6, 9), The indoor temperature and the indoor humidity are acquired, and it is determined whether or not the indoor temperature is equal to or lower than a first threshold, and whether the indoor humidity is equal to or lower than a second threshold, and the indoor temperature is equal to or lower than the first threshold. If it is determined that the indoor humidity is not lower than the second threshold, the control valve (3) is controlled to the first opening, and the indoor temperature is determined to be lower than the first threshold. And when it determines with the said indoor humidity being below the said 2nd threshold value, the process which controls the said control valve (3) to the 2nd opening degree smaller than the said 1st opening degree is performed, It is characterized by the above-mentioned. To do.

本発明によれば、空気調和機（１００）において、第１閾値及び第２閾値を冷媒音が発生しやすい条件に設定し、該条件に該当する場合に、調節弁（３）を第１開度よりも開度が小さい第２開度にし、該当しない場合に、調節弁（３）を第１開度とすることができる。 According to the present invention, in the air conditioner (100), the first threshold value and the second threshold value are set to conditions under which refrigerant noise is likely to be generated, and when the condition is satisfied, the control valve (3) is first opened. When the opening degree is smaller than the second opening degree, and does not correspond, the control valve (3) can be set to the first opening degree.

したがって、空気調和機（１００）の起動時に、調節弁（３）を第２開度で開いた後、冷媒の流量が安定するまで開度を絞る場合において、開度を絞る時間を短縮することができる。 Therefore, when opening the control valve (3) at the second opening degree at the time of starting the air conditioner (100) and then reducing the opening degree until the refrigerant flow rate is stabilized, the time for reducing the opening degree is shortened. Can do.

今回開示された実施の形態はすべての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上記した意味ではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。即ち、請求項に示した範囲で適宜変更した技術的手段を組み合わせて得られる実施形態も本発明の技術的範囲に含まれる。 The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

１室外熱交換器
３膨張弁（調節弁）
４圧縮機
６室外制御部
７室内熱交換器
９室内制御部
１０室外温度センサ（室外温度測定部）
７０室内温度センサ（室内温度測定部）
７１湿度センサ（湿度測定部）
１００空気調和機 1 Outdoor heat exchanger 3 Expansion valve (control valve)
4 Compressor 6 Outdoor Control Unit 7 Indoor Heat Exchanger 9 Indoor Control Unit 10 Outdoor Temperature Sensor (Outdoor Temperature Measurement Unit)
70 Indoor temperature sensor (Indoor temperature measurement unit)
71 Humidity sensor (humidity measurement unit)
100 air conditioner

Claims

A control valve that is arranged between the outdoor heat exchanger and the indoor heat exchanger and adjusts the flow rate of the refrigerant;
A control valve control unit for controlling the opening of the control valve;
An indoor temperature measuring unit for measuring the indoor temperature;
A humidity measurement unit that measures indoor humidity,
The control valve controller is
When the room temperature measured by the room temperature measuring unit is higher than a first threshold, or when the room humidity measured by the humidity measuring unit is higher than a second threshold, the control valve is controlled to the first opening,
When the indoor temperature is not more than the first threshold and the indoor humidity is not more than the second threshold, the control valve is controlled to a second opening that is smaller than the first opening. A featured air conditioner.

An outdoor temperature measuring unit for measuring the outdoor temperature;
The control valve controller is
Further, when the outdoor temperature measured by the outdoor temperature measurement unit is equal to or higher than a third threshold value and the indoor humidity is equal to or lower than the second threshold value, the control valve is controlled to the second opening degree. The air conditioner according to claim 1, wherein

A compressor,
A compressor control unit that controls the operation of the compressor based on a target rotational speed set based on an indoor temperature and an outdoor temperature; and
The first opening and the second opening are set corresponding to the target rotational speed,
The air conditioner according to claim 2, wherein the second opening is set such that a difference from the first opening is increased or decreased in accordance with the target rotational speed.

The compressor controller is
After operating the compressor at a predetermined rotational speed from the start of operation, the rotational speed is increased based on the target rotational speed to operate the compressor,
The control valve controller is
After the compressor control unit increases the rotation speed of the compressor,
When the control valve is at the first opening, it is throttled at a first speed to a third opening that is smaller than the second opening;
4. The air conditioner according to claim 3, wherein when the control valve is at the second opening degree, the air conditioner is throttled to the third opening degree at a second speed higher than the first speed.

The air conditioner according to any one of claims 1 to 4, wherein a plurality of indoor heat exchangers are connected to the outdoor heat exchanger.