JP2020070977A

JP2020070977A - Air conditioner

Info

Publication number: JP2020070977A
Application number: JP2018205563A
Authority: JP
Inventors: 智彦堤; Tomohiko Tsutsumi; 伊藤　裕; Yutaka Ito; 裕伊藤; 顕木下; Akira Kinoshita; 純也米田; Junya Yoneda; 均川島; Hitoshi Kawashima; 貴裕仲田; Takahiro Nakata; 久瑠美加藤; Kurumi Kato
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-05-07
Anticipated expiration: 2038-10-31
Also published as: JP6989780B2

Abstract

To provide an air conditioner capable of optimizing a time of an internal drying operation according to a dehumidifying mode.SOLUTION: An air conditioner includes a refrigerant circuit (RC) in which a compressor (21), an outdoor heat exchanger (23), an expansion mechanism (24) and an indoor heat exchanger (11) are annularly connected, an indoor unit (1) having a casing (10) provided with the indoor heat exchanger (11) in an air passage, and an indoor fan (12) disposed in the air passage of the casing (10), and a control device (100) performing an internal drying operation for drying the inside of the air passage of the indoor unit (1) through at least one of an air blowing operation for circulating indoor air through the indoor heat exchanger (11) by the indoor fan (12), and a heating operation in which the indoor heat exchanger (11) is functioned as a condenser. The air conditioner can perform operations of a plurality of various dehumidifying modes, and the internal drying operation performed after the operation of each of the plurality of dehumidifying modes can apply an operation time various according to the plurality of various dehumidifying modes.SELECTED DRAWING: Figure 1

Description

本開示は、空気調和機に関する。 The present disclosure relates to an air conditioner.

従来、空気調和機としては、室内機と人検知センサを備え、冷房運転や除湿運転後に、人検知センサが人を検知した場合と人を検知しなかった場合で異なる内部乾燥運転を行うものがある(例えば、特開２０１８−１１２３７２号公報(特許文献１)参照)。 Conventionally, as an air conditioner, there is one that includes an indoor unit and a human detection sensor, and performs different internal drying operations when the human detection sensor detects a person and when the human detection sensor does not detect a person after the cooling operation or the dehumidifying operation. (See, for example, JP-A-2018-112372 (Patent Document 1)).

特開２０１８−１１２３７２号公報JP, 2018-112372, A

ところで、上記空気調和機では、除湿運転の終了時よりも冷房運転の終了時の方が熱交換器などに付着した水滴量が多いにも関わらず、冷房運転や除湿運転の終了後に行う内部乾燥運転の時間を同じにしている。 By the way, in the air conditioner, although the amount of water droplets adhering to the heat exchanger is larger at the end of the cooling operation than at the end of the dehumidifying operation, the internal drying performed after the end of the cooling operation or the dehumidifying operation is performed. The driving time is the same.

このため、上記空気調和機では、冷房運転や除湿運転を含む除湿モードに応じた内部乾燥運転の時間の適正化がなされていないため、必要以上に内部乾燥運転が行われて電力が消費されたり、ユーザーが不快に感じたりする場合がある。 Therefore, in the air conditioner, the time for the internal drying operation is not optimized according to the dehumidifying mode including the cooling operation and the dehumidifying operation, so that the internal drying operation is performed more than necessary and power is consumed. , The user may feel uncomfortable.

また、上記空気調和機では、除湿モードによっては、熱交換器などに付着した水滴量が多い運転の終了後に内部乾燥運転を行うことで室内への湿度戻りが発生して、ユーザーに不快感を与える場合がある。 Further, in the air conditioner, depending on the dehumidifying mode, the humidity may return to the room by performing the internal drying operation after the operation with a large amount of water droplets adhering to the heat exchanger, etc., causing discomfort to the user. May be given.

本開示では、除湿モードに応じて内部乾燥運転の時間を適正化できる空気調和機を提案する。 The present disclosure proposes an air conditioner that can optimize the time of the internal drying operation according to the dehumidification mode.

また、本開示では、内部乾燥運転時の湿度戻りを抑制できる空気調和機を提案する。 In addition, the present disclosure proposes an air conditioner that can suppress humidity return during internal drying operation.

本開示の空気調和機は、
圧縮機、室外熱交換器、膨張機構および室内熱交換器が環状に接続された冷媒回路と、
上記室内熱交換器が風通路内に配置されたケーシングと、上記ケーシングの上記風通路内に配置された室内ファンとを有する室内機と、
上記室内ファンにより上記室内熱交換器を介して室内空気を循環させる送風運転および上記室内熱交換器を凝縮器として機能させる暖房運転の少なくとも一方により上記室内機の上記風通路内を乾燥させる内部乾燥運転を行う制御装置と
を備え、
異なる複数の除湿モードの運転が可能であり、
上記複数の除湿モード夫々の運転後に行う上記内部乾燥運転は、上記異なる複数の除湿モードに応じて異なる運転時間を用いることが可能なことを特徴とする。 The air conditioner of the present disclosure is
A compressor, an outdoor heat exchanger, a refrigerant circuit in which an expansion mechanism and an indoor heat exchanger are annularly connected,
An indoor unit having a casing in which the indoor heat exchanger is arranged in a wind passage, and an indoor fan arranged in the wind passage of the casing,
Internal drying for drying the inside of the air passage of the indoor unit by at least one of a blowing operation in which indoor air is circulated through the indoor heat exchanger by the indoor fan and a heating operation in which the indoor heat exchanger functions as a condenser. With a control device for driving,
It is possible to operate in different dehumidification modes,
The internal drying operation performed after the operation of each of the plurality of dehumidification modes is characterized in that different operation times can be used depending on the plurality of different dehumidification modes.

本開示によれば、複数の除湿モード夫々の運転後に行う内部乾燥運転において、異なる複数の除湿モードに応じて異なる運転時間を用いることが可能であるので、室内熱交換器をしっかり乾燥させることを優先する場合は、室内熱交換器の水滴量が多い除湿モードほど、その除湿モードの運転後に行う内部乾燥運転を長くすることで、室内機の風通路内が確実に乾燥されるようにする。これにより、除湿モードに応じて内部乾燥運転の時間を適正化できる。 According to the present disclosure, in the internal drying operation performed after the operation of each of the plurality of dehumidifying modes, it is possible to use different operation times according to different plurality of dehumidifying modes, so that it is possible to firmly dry the indoor heat exchanger. In the case of giving priority to the dehumidifying mode in which the amount of water droplets in the indoor heat exchanger is large, the internal drying operation performed after the operation in the dehumidifying mode is lengthened to ensure that the air passage in the indoor unit is dried. Thereby, the time of the internal drying operation can be optimized according to the dehumidification mode.

また、室内熱交換器から室内への湿度戻りを少なくすることを優先する場合は、室内熱交換器の水滴量が多い除湿モードほど、その除湿モードの運転後に行う内部乾燥運転を短くすることで、室内へ湿気が戻るのを抑える。これにより、除湿モードに応じて内部乾燥運転時の湿度戻りを抑制できる。 If priority is given to reducing the return of humidity from the indoor heat exchanger to the room, the dehumidifying mode in which the amount of water droplets in the indoor heat exchanger is large can be reduced by shortening the internal drying operation performed after the operation in the dehumidifying mode. , Suppress the return of moisture to the room. Thereby, it is possible to suppress the humidity return during the internal drying operation according to the dehumidification mode.

また、本開示の１つの態様に係る空気調和機では、
上記複数の除湿モードの運転は、上記室内熱交換器の実質的に全部を蒸発域とする第１除湿運転と、上記室内熱交換器の一部を凝縮域とする一方、上記室内熱交換器の残りの部分を蒸発域とする第２除湿運転とを含み、
上記第１除湿運転後の上記内部乾燥運転の運転時間は、上記第２除湿運転後の上記内部乾燥運転の運転時間よりも長い。 Further, in the air conditioner according to one aspect of the present disclosure,
The plurality of dehumidifying modes of operation include a first dehumidifying operation in which substantially all of the indoor heat exchanger is in the evaporation region and a portion of the indoor heat exchanger is in the condensation region, while the indoor heat exchanger is in operation. And a second dehumidifying operation in which the remaining portion of
The operating time of the internal drying operation after the first dehumidifying operation is longer than the operating time of the internal drying operation after the second dehumidifying operation.

本開示によれば、室内熱交換器の実質的に全部を蒸発域となる第１除湿運転の終了後の室内熱交換器に付着した水滴量が第２除湿運転よりも多いので、第１除湿運転後の内部乾燥運転の運転時間を長くして、第１除湿運転の終了後の室内機の風通路内を確実に乾燥させることが可能になる。 According to the present disclosure, the amount of water droplets adhering to the indoor heat exchanger after the end of the first dehumidifying operation in which substantially all of the indoor heat exchanger is in the evaporation region is larger than that in the second dehumidifying operation, so the first dehumidifying operation is performed. By increasing the operation time of the internal drying operation after the operation, it is possible to surely dry the inside of the air passage of the indoor unit after the end of the first dehumidifying operation.

また、本開示の１つの態様に係る空気調和機では、
上記複数の除湿モードの運転は、上記室内熱交換器の一部を蒸発域にする一方、上記室内熱交換器の残りの部分を過熱域にする第３除湿運転を含み、
上記第３除湿運転後の上記内部乾燥運転の運転時間は、上記第１除湿運転後の上記内部乾燥運転の運転時間よりも短く、かつ、上記第２除湿運転後の上記内部乾燥運転の運転時間よりも長い。 Further, in the air conditioner according to one aspect of the present disclosure,
The operation in the plurality of dehumidifying modes includes a third dehumidifying operation in which a part of the indoor heat exchanger is in an evaporation region and the remaining part of the indoor heat exchanger is in an overheating region,
The operating time of the internal drying operation after the third dehumidifying operation is shorter than the operating time of the internal drying operation after the first dehumidifying operation, and the operating time of the internal drying operation after the second dehumidifying operation. Longer than.

本開示によれば、室内熱交換器に付着する水滴量が多い第１除湿運転、第３除湿運転、第２除湿運転の順に、内部乾燥運転の運転時間が長短に設定されることで、第１〜第３除湿運転の除湿モードに応じて内部乾燥運転の時間を適正化できる。 According to the present disclosure, the operating time of the internal drying operation is set to be short or long in the order of the first dehumidifying operation, the third dehumidifying operation, and the second dehumidifying operation in which the amount of water droplets adhering to the indoor heat exchanger is large. The time of the internal drying operation can be optimized according to the dehumidifying modes of the first to third dehumidifying operations.

また、本開示の１つの態様に係る空気調和機では、
上記複数の除湿モードの運転は、上記室内熱交換器の実質的に全部を蒸発域とする第１除湿運転と、上記室内熱交換器の一部を凝縮域とする一方、上記室内熱交換器の残りの部分を蒸発域とする第２除湿運転とを含み、
上記第１除湿運転後の上記内部乾燥運転の運転時間は、上記第２除湿運転後の上記内部乾燥運転の運転時間よりも短い。 Further, in the air conditioner according to one aspect of the present disclosure,
The plurality of dehumidifying modes of operation include a first dehumidifying operation in which substantially all of the indoor heat exchanger is in the evaporation region and a portion of the indoor heat exchanger is in the condensation region, while the indoor heat exchanger is in operation. And a second dehumidifying operation in which the remaining portion of
The operating time of the internal drying operation after the first dehumidifying operation is shorter than the operating time of the internal drying operation after the second dehumidifying operation.

本開示によれば、室内熱交換器の実質的に全部を蒸発域とする第１除湿運転の終了後の室内熱交換器に付着した水滴量が第２除湿運転よりも多いので、室内熱交換器の水滴量が多い第１除湿運転ほど、その第１除湿運転の運転後に行う内部乾燥運転を短くすることで、第１除湿運転の終了後の内部乾燥運転時の湿度戻りを抑制できる。 According to the present disclosure, the amount of water droplets adhering to the indoor heat exchanger after the completion of the first dehumidifying operation in which substantially all of the indoor heat exchanger is the evaporation region is larger than that in the second dehumidifying operation, so that the indoor heat exchange is performed. By reducing the internal drying operation performed after the operation of the first dehumidifying operation as the first dehumidifying operation having a larger amount of water drops in the container, it is possible to suppress the humidity return during the internal drying operation after the end of the first dehumidifying operation.

また、本開示の１つの態様に係る空気調和機では、
上記複数の除湿モードの運転は、上記室内熱交換器の一部を蒸発域にする一方、上記室内熱交換器の残りの部分を過熱域にする第３除湿運転を含み、
上記第３除湿運転後の内部乾燥運転の運転時間は、上記第１除湿運転後の上記内部乾燥運転の運転時間よりも長く、かつ、上記第２除湿運転後の上記内部乾燥運転の運転時間よりも短い。 Further, in the air conditioner according to one aspect of the present disclosure,
The operation in the plurality of dehumidifying modes includes a third dehumidifying operation in which a part of the indoor heat exchanger is in an evaporation region and the remaining part of the indoor heat exchanger is in an overheating region,
The operating time of the internal drying operation after the third dehumidifying operation is longer than the operating time of the internal drying operation after the first dehumidifying operation, and is longer than the operating time of the internal drying operation after the second dehumidifying operation. Is also short.

本開示によれば、室内熱交換器に付着した水滴量が少ない第２除湿運転、第３除湿運転、第１除湿運転の順に、内部乾燥運転の運転時間が長短に設定されることで、第１〜第３除湿運転の終了後の内部乾燥運転時の湿度戻りを抑制できる。 According to the present disclosure, the operation time of the internal drying operation is set to be long or short in the order of the second dehumidification operation, the third dehumidification operation, and the first dehumidification operation in which the amount of water droplets attached to the indoor heat exchanger is small. It is possible to suppress the humidity return during the internal drying operation after the completion of the first to third dehumidifying operations.

また、本開示の１つの態様に係る空気調和機では、
上記第３除湿運転の継続時間が第１所定時間以上のとき、該第３除湿運転後に上記内部乾燥運転を行うと共に、
上記第２除湿運転の継続時間が第２所定時間以上のとき、該第２除湿運転後に上記内部乾燥運転を行う。 Further, in the air conditioner according to one aspect of the present disclosure,
When the duration of the third dehumidifying operation is the first predetermined time or longer, the internal drying operation is performed after the third dehumidifying operation,
When the duration of the second dehumidifying operation is the second predetermined time or more, the internal drying operation is performed after the second dehumidifying operation.

本開示によれば、第３除湿運転の継続時間が第１所定時間未満のとき、すなわち、室内熱交換器に付着した水滴量が少ない短時間の第３除湿運転では内部乾燥運転を行わないので、内部乾燥運転を効率よく行うことができる。また、第２除湿運転の継続時間が第２所定時間未満のとき、すなわち、室内熱交換器に付着した水滴量が少ない短時間の第２除湿運転では内部乾燥運転を行わないので、内部乾燥運転を効率よく行うことができる。 According to the present disclosure, when the duration of the third dehumidification operation is less than the first predetermined time, that is, the internal drying operation is not performed in the short-time third dehumidification operation in which the amount of water droplets adhering to the indoor heat exchanger is small. The internal drying operation can be efficiently performed. In addition, when the duration of the second dehumidifying operation is less than the second predetermined time, that is, in the second dehumidifying operation for a short time when the amount of water droplets adhering to the indoor heat exchanger is small, the internal drying operation is not performed. Can be done efficiently.

本開示の第１実施形態の空気調和器の冷媒回路の回路図である。It is a circuit diagram of a refrigerant circuit of an air harmony machine of a 1st embodiment of this indication. 上記空気調和機の室内機の断面模式図である。It is a cross-sectional schematic diagram of the indoor unit of the said air conditioner. 上記空気調和機の制御ブロック図である。It is a control block diagram of the said air conditioner. 上記空気調和機の冷房除湿運転を説明するための模式図である。It is a schematic diagram for demonstrating the cooling dehumidification operation | movement of the said air conditioner. 上記空気調和機の過絞り除湿運転を説明するための模式図である。It is a schematic diagram for demonstrating the over-throttle dehumidification operation of the said air conditioner. 上記空気調和機の再熱除湿運転を説明するための模式図である。It is a schematic diagram for demonstrating the reheat dehumidification operation | movement of the said air conditioner. 上記空気調和機の冷房除湿運転時、過絞り除湿運転時および再熱除湿運転時のモリエル線図である。It is a Mollier diagram at the time of cooling dehumidification operation of the above-mentioned air harmony machine, at the time of over throttling dehumidification operation, and reheat dehumidification operation. 上記空気調和機の内部乾燥運転を説明するタイミングチャートである。It is a timing chart explaining an internal drying operation of the air conditioner. 本開示の第３実施形態の空気調和機の内部乾燥運転を説明するタイミングチャートである。It is a timing chart explaining the internal drying operation of the air conditioner of the third embodiment of the present disclosure.

以下、実施形態を説明する。なお、図面において、同一の参照番号は、同一部分または相当部分を表わすものである。また、長さ、幅、厚さ、深さ等の図面上の寸法は、図面の明瞭化と簡略化のために実際の尺度から適宜変更されており、実際の相対寸法を表してはいない。 Embodiments will be described below. In the drawings, the same reference numerals represent the same or corresponding parts. Further, dimensions such as length, width, thickness, and depth on the drawing are appropriately changed from an actual scale for the sake of clarity and simplification of the drawing, and do not represent actual relative dimensions.

〔第１実施形態〕
図１は、本開示の第１実施形態の空気調和機が備える冷媒回路ＲＣの回路図である。 [First Embodiment]
FIG. 1 is a circuit diagram of a refrigerant circuit RC included in the air conditioner of the first embodiment of the present disclosure.

上記空気調和機は、空調対象である室内に設置される室内機１と、室外に設置される室外機２とを備える。 The air conditioner includes an indoor unit 1 installed inside a room to be air-conditioned and an outdoor unit 2 installed outdoors.

＜室内機１の構成＞
上記空気調和機の室内機１は、例えば、室内の壁面に取り付けられる壁掛け式の室内ユニットである。この室内機１は、室内熱交換器１１と、この室内熱交換器１１に空気を送る室内ファン１２と、室内熱交換器１１の温度を検出する室内熱交換器温度センサ５１と、室内温度を検出する室内温度センサ５２と、室内湿度を検出する室内湿度センサ５３と、ストリーマ放電ユニット３０とを有する。 <Structure of indoor unit 1>
The indoor unit 1 of the air conditioner is, for example, a wall-mounted indoor unit attached to a wall surface in the room. The indoor unit 1 includes an indoor heat exchanger 11, an indoor fan 12 that sends air to the indoor heat exchanger 11, an indoor heat exchanger temperature sensor 51 that detects the temperature of the indoor heat exchanger 11, and an indoor temperature. It has an indoor temperature sensor 52 for detecting, an indoor humidity sensor 53 for detecting indoor humidity, and a streamer discharge unit 30.

室内熱交換器１１は、室内ファン１２による空気流に関して、室内ファン１２よりも上流側に位置している。この室内熱交換器１１は、室内ファン１２からの空気と冷媒との熱交換を行うために、本体熱交換部１１ａと、補助熱交換部１１ｂと、制御弁の一例としての電磁弁１３とを有する。 The indoor heat exchanger 11 is located upstream of the indoor fan 12 with respect to the air flow from the indoor fan 12. This indoor heat exchanger 11 includes a main body heat exchange section 11a, an auxiliary heat exchange section 11b, and a solenoid valve 13 as an example of a control valve in order to exchange heat between the air from the indoor fan 12 and the refrigerant. Have.

本体熱交換部１１ａは、室内側に位置する正面部１１ａ−１と、室内側とは反対側に位置する背面部１１ａ−２とから成っている。また、正面部１１ａ−１は、冷媒配管Ｌ１２，Ｌ１３および電磁弁１３を介して背面部１１ａ−２に流体的に接続されている。これにより、膨張弁２４から本体熱交換部１１ａへ流れる冷媒は、正面部１１ａ−１を流れた後、背面部１１ａ−２に流入することが可能となっている。 The main body heat exchange section 11a includes a front surface section 11a-1 located on the indoor side and a back surface section 11a-2 located on the opposite side to the indoor side. Further, the front surface portion 11a-1 is fluidly connected to the rear surface portion 11a-2 via the refrigerant pipes L12, L13 and the electromagnetic valve 13. Thereby, the refrigerant flowing from the expansion valve 24 to the main body heat exchange portion 11a can flow into the rear surface portion 11a-2 after flowing through the front surface portion 11a-1.

補助熱交換部１１ｂは、本体熱交換部１１ａの正面部１１ａ−１に関して本体熱交換部１１ａの背面部１１ａ−２側とは反対側に設けられている。すなわち、補助熱交換部１１ｂは、本体熱交換部１１ａの正面部１１ａ−１よりも、室内側に位置する。この補助熱交換部１１ｂは、本体熱交換部１１ａよりも、容積が小さい。また、補助熱交換部１１ｂの一端に冷媒配管Ｌ４が接続され、補助熱交換部１１ｂの他端に、冷媒配管Ｌ１１を介して本体熱交換部１１ａの正面部１１ａ−１を接続している。これにより、膨張弁２４側からの冷媒は、補助熱交換部１１ｂを介して、本体熱交換部１１ａに供給される。 The auxiliary heat exchange part 11b is provided on the side opposite to the back face part 11a-2 side of the main body heat exchange part 11a with respect to the front face part 11a-1 of the main body heat exchange part 11a. That is, the auxiliary heat exchange section 11b is located on the indoor side of the front surface section 11a-1 of the main body heat exchange section 11a. The volume of the auxiliary heat exchange section 11b is smaller than that of the main body heat exchange section 11a. The refrigerant pipe L4 is connected to one end of the auxiliary heat exchange part 11b, and the front face part 11a-1 of the main body heat exchange part 11a is connected to the other end of the auxiliary heat exchange part 11b via the refrigerant pipe L11. Thereby, the refrigerant from the expansion valve 24 side is supplied to the main body heat exchange section 11a via the auxiliary heat exchange section 11b.

室内ファン１２としては、例えば、クロスフローファンが採用される。このクロスフローファンは、室内熱交換器１１で温度などが調整された空気を室内に向けて吹き出す。 As the indoor fan 12, for example, a cross flow fan is adopted. This cross flow fan blows out the air whose temperature is adjusted by the indoor heat exchanger 11 toward the room.

電磁弁１３は、室内熱交換器１１の冷媒パスの中間部に設けられている。より詳しく説明すると、本体熱交換部１１ａの正面部１１ａ−１側と本体熱交換部１１ａの背面部１１ａ−２側との間に差圧を設定するための弁である。電磁弁１３は、大開度および小開度の２位置のみを取ることが可能なオンオフ弁であり、必要時(例えば、後述する再熱除湿運転時)にオンされ、大開度の位置から小開度の位置に切り替えられる。 The solenoid valve 13 is provided in the middle part of the refrigerant path of the indoor heat exchanger 11. More specifically, it is a valve for setting a differential pressure between the front surface portion 11a-1 side of the main body heat exchange portion 11a and the rear surface portion 11a-2 side of the main body heat exchange portion 11a. The solenoid valve 13 is an on / off valve that can take only two positions, a large opening and a small opening, is turned on when necessary (for example, during reheat dehumidification operation described later), and opens from the large opening position to a small opening. Switch to degree position.

＜室外機２の構成＞
上記空気調和機の室外機２は、圧縮機２１と、四路切換弁２２と、室外熱交換器２３と、膨張機構の一例としての膨張弁２４と、アキュムレータ２５と、室外熱交換器２３に空気を送る室外ファン２６とを有する。さらに、室外機２は、室外熱交換器２３の温度を検出する室外熱交換器温度センサ５６と、外気温度を検出する外気温度センサ５７と、膨張弁２４で減圧された冷媒の温度(蒸発温度)を検出する冷媒温度センサ５８とを有する。 <Structure of outdoor unit 2>
The outdoor unit 2 of the air conditioner includes a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an expansion valve 24 as an example of an expansion mechanism, an accumulator 25, and an outdoor heat exchanger 23. An outdoor fan 26 for sending air. Furthermore, the outdoor unit 2 includes an outdoor heat exchanger temperature sensor 56 that detects the temperature of the outdoor heat exchanger 23, an outdoor air temperature sensor 57 that detects the outdoor air temperature, and a temperature of the refrigerant depressurized by the expansion valve 24 (evaporation temperature). ) Is detected.

室外熱交換器２３は、室外ファン２６による空気流に関して、室外ファン２６よりも下流側に位置している。室外熱交換器２３内を流れる冷媒は、室外ファン２６からの空気と熱交換する。 The outdoor heat exchanger 23 is located downstream of the outdoor fan 26 with respect to the air flow from the outdoor fan 26. The refrigerant flowing in the outdoor heat exchanger 23 exchanges heat with the air from the outdoor fan 26.

膨張弁２４は、互いに異なる３以上の開度に調整可能な例えば電動弁であって、制御装置１００(図３に示す)からの信号に応じて開度が変化する。 The expansion valve 24 is, for example, an electric valve that can be adjusted to three or more different opening degrees, and the opening degree changes according to a signal from the control device 100 (shown in FIG. 3).

＜冷媒回路ＲＣの構成＞
また、上記空気調和機の冷媒回路ＲＣは、室内熱交換器１１、圧縮機２１、四路切換弁２２、室外熱交換器２３、膨張弁２４、アキュムレータ２５および冷媒配管Ｌ１〜Ｌ７から成っている。より詳しく説明すると、室内熱交換器１１、圧縮機２１、四路切換弁２２、室外熱交換器２３、膨張弁２４およびアキュムレータ２５が、冷媒配管Ｌ１〜Ｌ７によって流体的に接続される。これにより、環状の冷媒回路ＲＣが構成されている。このような冷媒回路ＲＣにおいて、圧縮機２１を駆動時することにより冷媒が循環する。 <Structure of Refrigerant Circuit RC>
The refrigerant circuit RC of the air conditioner includes an indoor heat exchanger 11, a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an expansion valve 24, an accumulator 25, and refrigerant pipes L1 to L7. .. More specifically, the indoor heat exchanger 11, the compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, the expansion valve 24, and the accumulator 25 are fluidly connected by the refrigerant pipes L1 to L7. Thereby, the annular refrigerant circuit RC is configured. In such a refrigerant circuit RC, the refrigerant is circulated by driving the compressor 21.

また、図示しないが、上記空気調和機は、リモートコントローラ(以下、「リモコン」と言う。)を備える。ユーザーは、リモコンを操作して、自動運転、冷房運転、暖房運転、除湿運転などを開始させたり、停止させたりすることができる。 Further, although not shown, the air conditioner includes a remote controller (hereinafter, referred to as “remote control”). The user can operate the remote controller to start or stop automatic operation, cooling operation, heating operation, dehumidifying operation, and the like.

図２は、室内機１の断面模式図である。 FIG. 2 is a schematic sectional view of the indoor unit 1.

図２に示すように、室内機１は、室内熱交換器１１が風通路内に配置されたケーシング１０と、ケーシング１０の風通路内かつ室内熱交換器１１よりも下流側に配置された室内ファン１２と、ケーシング１０の風通路内かつ室内熱交換器１１よりも上流側にストリーマ放電ユニット３０とを有する。図２において、３１は、吹出口１ａに設けられ、上下方向に回動可能な水平フラップである。また、ケーシング１０の風通路は、太い実線の矢印で示されている空気流の通路である。 As shown in FIG. 2, the indoor unit 1 includes a casing 10 in which an indoor heat exchanger 11 is arranged in the air passage, and an indoor unit arranged in the air passage of the casing 10 and downstream of the indoor heat exchanger 11. The fan 12 and the streamer discharge unit 30 are provided in the air passage of the casing 10 and upstream of the indoor heat exchanger 11. In FIG. 2, reference numeral 31 is a horizontal flap that is provided at the outlet 1a and is vertically rotatable. Further, the wind passage of the casing 10 is an air flow passage indicated by a thick solid line arrow.

ストリーマ放電ユニット３０は、プラズマ放電の一種であるストリーマ放電が発生する。このストリーマ放電の発生時に酸化分解力の高い活性種が生成され、これらの活性種は、ケーシング１０の風通路内において、アンモニア類や、アルデヒド類、窒素酸化物等の小さな有機分子からなる有害成分や臭気成分を分解する。 The streamer discharge unit 30 generates streamer discharge which is a kind of plasma discharge. When this streamer discharge occurs, active species having a high oxidative decomposition power are generated, and these active species are harmful components composed of small organic molecules such as ammonia, aldehydes and nitrogen oxides in the air passage of the casing 10. And decomposes odorous components.

また、図３は、上記空気調和機の制御ブロック図である。 FIG. 3 is a control block diagram of the air conditioner.

上記空気調和機は、図３に示すように、冷媒回路ＲＣを制御する制御装置１００を備える。より詳しく説明すると、制御装置１００は、マイクロコンピュータ、入出力回路などから成っている。この制御装置１００が、室内熱交換器温度センサ５１、室内温度センサ５２、室内湿度センサ５３、室外熱交換器温度センサ５６、外気温度センサ５７、冷媒温度センサ５８などからの信号に基づいて、圧縮機２１、四路切換弁２２、膨張弁２４、室外ファン２６、室内ファン１２、電磁弁１３、ストリーマ放電ユニット３０および水平フラップ用駆動モータ３２などを制御する。 As shown in FIG. 3, the air conditioner includes a control device 100 that controls the refrigerant circuit RC. More specifically, the control device 100 is composed of a microcomputer, an input / output circuit, and the like. The control device 100 performs compression based on signals from the indoor heat exchanger temperature sensor 51, the indoor temperature sensor 52, the indoor humidity sensor 53, the outdoor heat exchanger temperature sensor 56, the outdoor air temperature sensor 57, the refrigerant temperature sensor 58, and the like. The machine 21, the four-way switching valve 22, the expansion valve 24, the outdoor fan 26, the indoor fan 12, the solenoid valve 13, the streamer discharge unit 30, the horizontal flap drive motor 32, and the like are controlled.

また、制御装置１００は、室内熱交換器１１の実質的に全部を蒸発域となる冷房除湿運転を行う冷房除湿運転制御部１００ａと、室内熱交換器１１の一部を蒸発域にする一方、室内熱交換器１１の残りの部分を過熱域にする過絞り除湿運転を行う過絞り除湿運転制御部１００ｂと、室内熱交換器１１の一部を凝縮域とする一方、室内熱交換器１１の残りの部分を蒸発域とする再熱除湿運転を行う再熱除湿運転制御部１００ｃとを有する。この冷房除湿運転制御部１００ａ、過絞り除湿運転制御部１００ｂおよび再熱除湿運転制御部１００ｃは、それぞれ、ソフトウェアにより構成されている。なお、上記冷房除湿運転は、第１除湿運転の一例であり、過絞り除湿運転は、第３除湿運転の一例であり、再熱除湿運転は、第２除湿運転の一例である。 Further, the control device 100 sets a cooling / dehumidifying operation control unit 100a that performs a cooling / dehumidifying operation in which substantially all of the indoor heat exchanger 11 becomes an evaporation area, and a part of the indoor heat exchanger 11 in an evaporation area. An over-throttle dehumidification operation control unit 100b that performs an over-throttle dehumidification operation that sets the remaining portion of the indoor heat exchanger 11 to an overheating area, and a portion of the indoor heat exchanger 11 that serves as a condensation area It has a reheat dehumidification operation control unit 100c that performs the reheat dehumidification operation with the remaining portion as the evaporation region. The cooling and dehumidifying operation control unit 100a, the over-throttle dehumidifying operation control unit 100b, and the reheat dehumidifying operation control unit 100c are each configured by software. The cooling dehumidification operation is an example of the first dehumidification operation, the over-throttle dehumidification operation is an example of the third dehumidification operation, and the reheat dehumidification operation is an example of the second dehumidification operation.

上記冷房除湿運転(第１除湿運転)、過絞り除湿運転(第３除湿運転)、再熱除湿運転(第２除湿運転)は、室内熱交換器１１の蒸発域の面積が異なる除湿モードの運転である。 The cooling / dehumidifying operation (first dehumidifying operation), the over-throttle dehumidifying operation (third dehumidifying operation), and the reheat dehumidifying operation (second dehumidifying operation) are operations in dehumidifying modes in which the areas of the evaporation regions of the indoor heat exchanger 11 are different. Is.

［冷房除湿運転(第１除湿運転)］
冷房除湿運転(第１除湿運転)は、図１に示すように、四路切換弁２２を実線の切換え位置に切り換えると共に、圧縮機２１を起動することで、開始される。この冷房除湿運転(第１除湿運転)中、圧縮機２１から吐出された高温高圧の冷媒が四路切換弁２２を介して室外熱交換器２３に流入する。そして、室外熱交換器２３で凝縮した冷媒は、膨張弁２４で減圧された後、室内熱交換器１１の補助熱交換部１１ｂと、室内熱交換器１１の本体熱交換部１１ａとに、この順で流入する。この本体熱交換部１１ａおよび補助熱交換部１１ｂで蒸発した冷媒が四路切換弁２２およびアキュムレータ２５を介して圧縮機２１の吸入側に戻る。このように、冷媒が冷媒回路ＲＣを循環するとき、冷房除湿運転制御部１００ａが、圧縮機２１の周波数と膨張弁２４の開度とを調整すると共に、電磁弁１３をオフにすることで、図４に示すように、室内熱交換器１１の全部を実質的に蒸発域(図４に示す斜線領域)とする。これにより、冷房除湿運転(第１除湿運転)は、室内温度を変化させるための能力である顕熱能力が高くなる。 [Cooling dehumidification operation (first dehumidification operation)]
The cooling / dehumidifying operation (first dehumidifying operation) is started by switching the four-way switching valve 22 to the switching position indicated by the solid line and starting the compressor 21, as shown in FIG. During this cooling / dehumidifying operation (first dehumidifying operation), the high-temperature and high-pressure refrigerant discharged from the compressor 21 flows into the outdoor heat exchanger 23 via the four-way switching valve 22. Then, the refrigerant condensed in the outdoor heat exchanger 23 is decompressed by the expansion valve 24, and then is supplied to the auxiliary heat exchange section 11b of the indoor heat exchanger 11 and the main body heat exchange section 11a of the indoor heat exchanger 11. Inflow in order. The refrigerant evaporated in the main body heat exchange section 11a and the auxiliary heat exchange section 11b returns to the suction side of the compressor 21 via the four-way switching valve 22 and the accumulator 25. As described above, when the refrigerant circulates in the refrigerant circuit RC, the cooling / dehumidifying operation control unit 100a adjusts the frequency of the compressor 21 and the opening degree of the expansion valve 24, and turns off the solenoid valve 13, As shown in FIG. 4, the entire indoor heat exchanger 11 is substantially an evaporation region (hatched region shown in FIG. 4). As a result, in the cooling dehumidifying operation (first dehumidifying operation), the sensible heat capacity, which is the capacity for changing the indoor temperature, becomes high.

ここで、室内熱交換器１１の全部を実質的に蒸発域にするとは、室内熱交換器１１の全部を蒸発域にするときだけでなく、所定条件下で室内熱交換器１１において一部を除いた部分だけを蒸発域にするときも含む。この一部(例えば、室内熱交換器１１の全容積の１／３以下の部分)だけが蒸発域とならない所定条件としては、例えば、室内環境などによって、室内熱交換器１１の冷媒出口近傍の部分が過熱域となるときなどがある。 Here, to make the entire indoor heat exchanger 11 substantially in the evaporation region means not only when the entire indoor heat exchanger 11 is in the evaporation region, but also when a part of the indoor heat exchanger 11 is in the evaporation region under a predetermined condition. This includes the case where only the removed part is used as the evaporation area. As a predetermined condition in which only a part of this (for example, a portion of 1/3 or less of the total volume of the indoor heat exchanger 11) does not become the evaporation region, for example, due to the indoor environment, the vicinity of the refrigerant outlet of the indoor heat exchanger 11 There are times when parts become overheated.

［過絞り除湿運転(第３除湿運転)］
過絞り除湿運転(第３除湿運転)は、冷房除湿運転(第１除湿運転)のときと同じ方向に冷媒を流す。このとき、過絞り除湿運転制御部１００ｂが、圧縮機２１の周波数と膨張弁２４の開度とを調整すると共に、電磁弁１３をオフにすることで、室内熱交換器１１の上流側の一部を蒸発域とする一方、室内熱交換器１１の残りの部分を過熱域とする。例えば、過絞り除湿運転制御部１００ｂは、図５に示すように、補助熱交換部１１ｂを蒸発域(斜線のハッチングを付した領域)にする一方、本体熱交換部１１ａの正面部１１ａ−１および背面部１１ａ−２を過熱域(図５に示す点のハッチングを付した領域)にする。これにより、過絞り除湿運転(第３除湿運転)は、冷房除湿運転(第１除湿運転)よりも顕熱能力が低くなるので、室内の熱負荷が高くも低くもないとき、室温の低下を抑制しつつ、室内の除湿を行える。図５では、補助熱交換部１１ｂの全部が蒸発域となるように描かれているが、補助熱交換部１１ｂの一部だけを蒸発域にすることも可能である。すなわち、上記蒸発域は、容積を変更することが可能な可変領域である。 [Excessive dehumidification operation (3rd dehumidification operation)]
The over-throttle dehumidifying operation (third dehumidifying operation) causes the refrigerant to flow in the same direction as the cooling dehumidifying operation (first dehumidifying operation). At this time, the over-throttle dehumidification operation control unit 100b adjusts the frequency of the compressor 21 and the opening degree of the expansion valve 24, and turns off the solenoid valve 13, thereby making one upstream side of the indoor heat exchanger 11. While the part is the evaporation area, the remaining part of the indoor heat exchanger 11 is the overheating area. For example, as shown in FIG. 5, the over-throttle dehumidification operation control unit 100b sets the auxiliary heat exchange unit 11b to the evaporation region (hatched region), while the front face unit 11a-1 of the main body heat exchange unit 11a. And the back surface portion 11a-2 is set to an overheated area (area hatched with dots shown in FIG. 5). As a result, the over-squeezing dehumidifying operation (third dehumidifying operation) has a lower sensible heat capacity than the cooling dehumidifying operation (first dehumidifying operation), so that the room temperature does not drop when the indoor heat load is neither high nor low. It can dehumidify the room while suppressing it. In FIG. 5, the entire auxiliary heat exchange section 11b is drawn as the evaporation zone, but it is also possible to make only part of the auxiliary heat exchange section 11b the evaporation zone. That is, the evaporation region is a variable region whose volume can be changed.

また、上記圧縮機２１および膨張弁２４は、過絞り除湿運転(第３除湿運転)中、蒸発域の容積が負荷に応じて変化するように制御される。例えば、過絞り除湿運転制御部１００ｂは、過絞り除湿運転(第３除湿運転)中、蒸発域が所定容積(例えば、室内熱交換器１１の全容積の２／３)以下となるように、圧縮機２１および膨張弁２４を制御する。 Further, the compressor 21 and the expansion valve 24 are controlled so that the volume of the evaporation region changes according to the load during the over-throttle dehumidifying operation (third dehumidifying operation). For example, during the over-throttle dehumidifying operation (third dehumidifying operation), the over-throttled dehumidifying operation control unit 100b sets the evaporation region to a predetermined volume (for example, 2/3 of the total volume of the indoor heat exchanger 11) or less, The compressor 21 and the expansion valve 24 are controlled.

ここで、上記負荷に応じて変化するとは、室内から蒸発域に供給される熱量に応じて変化することであって、その熱量は例えば室内温度(室内機１が吸い込む空気の温度)と室内風量(室内機１が吹き出す風の量)によって決まる。また、上記負荷は、必要除湿能力(必要冷房能力)に対応しており、例えば、室内温度と設定温度との差に基づいて検知できる。なお、上記設定温度としては、予め設定された温度、または、ユーザーがリモコンで設定した温度が用いられる。 Here, changing according to the load means changing according to the amount of heat supplied from the room to the evaporation region, and the amount of heat is, for example, the indoor temperature (the temperature of the air sucked by the indoor unit 1) and the indoor air volume. (Depends on the amount of wind blown by the indoor unit 1). The load corresponds to the required dehumidifying capacity (requiring cooling capacity), and can be detected based on, for example, the difference between the indoor temperature and the set temperature. As the set temperature, a preset temperature or a temperature set by a user with a remote controller is used.

［再熱除湿運転(第２除湿運転)］
再熱除湿運転(第２除湿運転)は、冷房除湿運転(第１除湿運転)ときと同じ方向に冷媒を流す。このとき、再熱除湿運転制御部１００ｃが、圧縮機２１の周波数と膨張弁２４の開度とを調整すると共に、電磁弁１３をオンにすることで、室内熱交換器１１において電磁弁１３よりも上流側の少なくとも一部を凝縮域にする一方、室内熱交換器１１において電磁弁１３より下流側の少なくとも一部を蒸発域とする。例えば、再熱除湿運転制御部１００ｃは、図６に示すように、補助熱交換部１１ｂと本体熱交換部１１ａの正面部１１ａ−１とを凝縮域(図６に示す格子のハッチングを付した領域)にする一方、本体熱交換部１１ａの背面部１１ａ−２を蒸発域(図６に示す斜線領域)にする。これにより、再熱除湿運転(第２除湿運転)は、過絞り除湿運転(第３除湿運転)よりも顕熱能力が低くなるので、室内の熱負荷が低いとき、室温の低下を抑制しつつ、室内の除湿を行える。 [Reheat dehumidification operation (second dehumidification operation)]
In the reheat dehumidifying operation (second dehumidifying operation), the refrigerant flows in the same direction as in the cooling dehumidifying operation (first dehumidifying operation). At this time, the reheat dehumidification operation control unit 100c adjusts the frequency of the compressor 21 and the opening degree of the expansion valve 24, and turns on the solenoid valve 13, so that in the indoor heat exchanger 11, the solenoid valve 13 is operated. In the indoor heat exchanger 11, at least a part of the indoor heat exchanger 11 on the downstream side of the solenoid valve 13 is an evaporation region. For example, as shown in FIG. 6, the reheat dehumidifying operation control unit 100c condenses the auxiliary heat exchange unit 11b and the front face portion 11a-1 of the main body heat exchange unit 11a into a condensation region (hatched grids shown in FIG. 6). Area), and the back surface portion 11a-2 of the main body heat exchange portion 11a is made into an evaporation area (hatched area shown in FIG. 6). As a result, the reheat dehumidifying operation (second dehumidifying operation) has a lower sensible heat capacity than the over-squeezing dehumidifying operation (third dehumidifying operation). Therefore, when the indoor heat load is low, a decrease in room temperature is suppressed. It can dehumidify the room.

また、上記再熱除湿運転では、電磁弁１３は、小開度の位置に切り替えられる。すなわち、上記再熱除湿運転における電磁弁１３の開度は、空気流量が１０．０Ｌ／ｍｉｎ未満に相当する開度である。上記再熱除湿運転における電磁弁１３の開度は、空気流量が５．０Ｌ／ｍｉｎに相当する開度であれば、好ましい。さらに、上記再熱除湿運転における電磁弁１３の開度は、空気流量が３．５Ｌ／ｍｉｎに相当する開度であれば、さらに好ましい。ここで、「上記再熱除湿運転における電磁弁１３の開度が、空気流量が１０Ｌ／ｍｉｎ未満に相当する開度である」とは、上記開度において冷媒回路ＲＣを流れる空気流量が１０Ｌ／ｍｉｎ未満であることをいうのではなく、電磁弁１３の流量特性から求められる上記開度における空気流量が１０Ｌ／ｍｉｎ未満であることをいう。 Further, in the reheat dehumidifying operation, the solenoid valve 13 is switched to the position of small opening. That is, the opening degree of the solenoid valve 13 in the reheat dehumidifying operation is an opening degree corresponding to an air flow rate of less than 10.0 L / min. It is preferable that the opening degree of the solenoid valve 13 in the reheat dehumidifying operation is an opening degree corresponding to an air flow rate of 5.0 L / min. Furthermore, the opening degree of the solenoid valve 13 in the reheat dehumidifying operation is more preferable as long as the opening degree corresponds to an air flow rate of 3.5 L / min. Here, "the opening degree of the solenoid valve 13 in the reheat dehumidification operation is an opening degree corresponding to an air flow rate of less than 10 L / min" means that the air flow rate flowing through the refrigerant circuit RC is 10 L / min. It does not mean that the air flow rate is less than 10 min / min, but that the air flow rate at the opening degree obtained from the flow rate characteristic of the solenoid valve 13 is less than 10 L / min.

上記冷房除湿運転(第１除湿運転)、過絞り除湿運転(第３除湿運転)または再熱除湿運転(第２除湿運転)は、リモコンの除湿運転のボタンの押下に応じて開始するようになっている。より詳しく説明すると、除湿運転のボタが押下されると、顕熱比ＳＨＦに基づいて、冷房除湿運転(第１除湿運転)、過絞り除湿運転(第３除湿運転)および再熱除湿運転(第２除湿運転)のうちの１つの除湿運転が自動的に選択されて開始する。その後、顕熱比ＳＨＦの変化に応じて、他の除湿運転に自動的に切り替わる。ここで、顕熱比ＳＨＦは、顕熱／(顕熱＋潜熱)で表され、例えば顕熱および潜熱は室内温度と室内湿度に基づいて算出する。 The above-described cooling dehumidification operation (first dehumidification operation), over-throttle dehumidification operation (third dehumidification operation) or reheat dehumidification operation (second dehumidification operation) is started in response to pressing of the dehumidification operation button on the remote controller. ing. More specifically, when the button of the dehumidifying operation is pressed, the cooling dehumidifying operation (first dehumidifying operation), the over-throttle dehumidifying operation (third dehumidifying operation), and the reheat dehumidifying operation (first) are performed based on the sensible heat ratio SHF. One of the two dehumidifying operations) is automatically selected and started. After that, another dehumidifying operation is automatically switched according to the change in the sensible heat ratio SHF. Here, the sensible heat ratio SHF is represented by sensible heat / (sensible heat + latent heat). For example, the sensible heat and the latent heat are calculated based on the room temperature and the room humidity.

図７は、上記空気調和機の冷房除湿運転(第１除湿運転)時、過絞り除湿運転(第３除湿運転)時および再熱除湿運転(第２除湿運転)時のモリエル線図である。 FIG. 7 is a Mollier diagram during the cooling and dehumidifying operation (first dehumidifying operation), the over-throttle dehumidifying operation (third dehumidifying operation), and the reheat dehumidifying operation (second dehumidifying operation) of the air conditioner.

過絞り除湿運転制御部１００ｂの制御は、過絞り除湿運転(第３除湿運転)の蒸発温度は、冷房除湿運転(第１除湿運転)の蒸発温度よりも低くなるように行われる。このとき、膨張弁２４の開度は、通常、冷房除湿運転(第１除湿運転)中の膨張弁２４の開度よりも小さくなる。 The control of the over-throttle dehumidification operation control unit 100b is performed so that the evaporation temperature of the over-throttle dehumidification operation (third dehumidification operation) becomes lower than the evaporation temperature of the cooling dehumidification operation (first dehumidification operation). At this time, the opening degree of the expansion valve 24 is usually smaller than the opening degree of the expansion valve 24 during the cooling and dehumidifying operation (first dehumidifying operation).

再熱除湿運転制御部１００ｃの制御は、再熱除湿運転(第２除湿運転)の蒸発温度が過絞り除湿運転(第３除湿運転)の蒸発温度よりも低くなるように行われる。このとき、膨張弁２４の開度は、過絞り除湿運転(第３除湿運転)中における膨張弁２４の最大開度よりも大きい開度に固定される。 The control of the reheat dehumidification operation control unit 100c is performed so that the evaporation temperature of the reheat dehumidification operation (second dehumidification operation) becomes lower than the evaporation temperature of the over-throttle dehumidification operation (third dehumidification operation). At this time, the opening degree of the expansion valve 24 is fixed to a larger opening degree than the maximum opening degree of the expansion valve 24 during the over-throttle dehumidifying operation (third dehumidifying operation).

また、過絞り除湿運転制御部１００ｂは、過絞り除湿運転(第３除湿運転)の開始後、冷媒温度センサ５８によって検出された蒸発温度を用いて、膨張弁２４の開度を調整する。より具体的に説明すると、上記蒸発温度が所定温度(例えば１０℃)となるように、かつ、室内熱交換器１１の冷媒パスの中間部が過熱域となるように、膨張弁２４の開度が調整される。 In addition, the over-throttle dehumidifying operation control unit 100b adjusts the opening degree of the expansion valve 24 using the evaporation temperature detected by the refrigerant temperature sensor 58 after the start of the over-throttle dehumidifying operation (third dehumidifying operation). More specifically, the opening degree of the expansion valve 24 so that the evaporation temperature becomes a predetermined temperature (for example, 10 ° C.) and the intermediate portion of the refrigerant path of the indoor heat exchanger 11 becomes an overheat region. Is adjusted.

また、冷房除湿運転制御部１００ａと過絞り除湿運転制御部１００ｂは、冷房除湿運転(第１除湿運転)と過絞り除湿運転(第３除湿運転)との切り替えを顕熱比ＳＨＦに基づいて行う。この冷房除湿運転(第１除湿運転)から過絞り除湿運転(第３除湿運転)に切り替えるときの顕熱比ＳＨＦの第１閾値と、再熱除湿運転(第２除湿運転)から冷房除湿運転(第１除湿運転)に切り替えるときの顕熱比ＳＨＦの第２閾値とは、相互の切り替えにおいてヒステリシスを有するように異なる値に設定されている。 Further, the cooling / dehumidifying operation control unit 100a and the over-throttle dehumidifying operation control unit 100b perform switching between the cooling / dehumidifying operation (first dehumidifying operation) and the over-throttle dehumidifying operation (third dehumidifying operation) based on the sensible heat ratio SHF. .. The first threshold value of the sensible heat ratio SHF when switching from the cooling dehumidifying operation (first dehumidifying operation) to the over-throttle dehumidifying operation (third dehumidifying operation), and the reheat dehumidifying operation (second dehumidifying operation) to the cooling dehumidifying operation ( The second threshold value of the sensible heat ratio SHF at the time of switching to the first dehumidification operation) is set to a different value so as to have hysteresis in the mutual switching.

過絞り除湿運転制御部１００ｂと再熱除湿運転制御部１００ｃは、過絞り除湿運転(第３除湿運転)と再熱除湿運転(第２除湿運転)との切り替えを顕熱比ＳＨＦに基づいて行う。この過絞り除湿運転(第３除湿運転)から再熱除湿運転(第２除湿運転)に切り替えるときの顕熱比ＳＨＦの第３閾値と、再熱除湿運転(第２除湿運転)から過絞り除湿運転(第３除湿運転)に切り替えるときの顕熱比ＳＨＦの第２閾値とは、相互の切り替えにおいてヒステリシスを有するように異なる値に設定されている。 The over-throttle dehumidification operation control unit 100b and the reheat dehumidification operation control unit 100c perform switching between the over-throttle dehumidification operation (third dehumidification operation) and the reheat dehumidification operation (second dehumidification operation) based on the sensible heat ratio SHF. .. The third threshold value of the sensible heat ratio SHF at the time of switching from the overheat dehumidification operation (third dehumidification operation) to the reheat dehumidification operation (second dehumidification operation), and the overheat dehumidification operation from the reheat dehumidification operation (second dehumidification operation) The second threshold value of the sensible heat ratio SHF at the time of switching to the operation (third dehumidifying operation) is set to a different value so as to have hysteresis in the mutual switching.

上記構成の空気調和機において、制御装置１００により、冷房除湿運転(第１除湿運転)と過絞り除湿運転(第３除湿運転)および再熱除湿運転(第２除湿運転)のそれぞれの終了後に内部乾燥運転を行う。この内部乾燥運転は、室内ファン１２により室内熱交換器１１を介して室内空気を循環させる送風運転、および、室内熱交換器１１を凝縮器として機能させる暖房運転により、室内機１の風通路内を乾燥させる。 In the air conditioner having the above-described configuration, the control device 100 causes the internal operation after the cooling dehumidifying operation (first dehumidifying operation), the over-throttle dehumidifying operation (third dehumidifying operation), and the reheat dehumidifying operation (second dehumidifying operation). Perform dry operation. The internal drying operation is performed by the indoor fan 12 in which the indoor air is circulated through the indoor heat exchanger 11 and the heating operation in which the indoor heat exchanger 11 functions as a condenser. To dry.

暖房運転は、図１に示すように、四路切換弁２２を点線の切換え位置に切り換えると共に、圧縮機２１を起動することで、開始される。この暖房運転中、圧縮機２１から吐出された高温高圧の冷媒が四路切換弁２２を介して室内熱交換器１１に流入する。そして、室内熱交換器１１で凝縮した冷媒は、膨張弁２４で減圧された後、室外熱交換器２３に流入する。この室外熱交換器２３で蒸発した冷媒が四路切換弁２２およびアキュムレータ２５を介して圧縮機２１の吸入側に戻る。このとき、膨張弁２４を所定開度にし、電磁弁１３をオフにして冷媒回路ＲＣを冷媒が循環することで、室内熱交換器１１は凝縮器として機能し、室外熱交換器２３は蒸発器として機能する。 As shown in FIG. 1, the heating operation is started by switching the four-way switching valve 22 to the switching position indicated by the dotted line and starting the compressor 21. During this heating operation, the high-temperature and high-pressure refrigerant discharged from the compressor 21 flows into the indoor heat exchanger 11 via the four-way switching valve 22. Then, the refrigerant condensed in the indoor heat exchanger 11 is decompressed by the expansion valve 24 and then flows into the outdoor heat exchanger 23. The refrigerant evaporated in the outdoor heat exchanger 23 returns to the suction side of the compressor 21 via the four-way switching valve 22 and the accumulator 25. At this time, the expansion valve 24 is set to a predetermined opening degree, the solenoid valve 13 is turned off, and the refrigerant circulates in the refrigerant circuit RC, whereby the indoor heat exchanger 11 functions as a condenser, and the outdoor heat exchanger 23 is an evaporator. Function as.

図８は、内部乾燥運転を説明するタイミングチャートである。 FIG. 8 is a timing chart illustrating the internal drying operation.

図８に示すように、運転指令が内部乾燥運転となると、最初の期間ｔ１において、ストリーマ放電ユニット３０(図１〜図３に示す)をオンし、水平フラップ用駆動モータ３２により水平フラップ３１を全閉状態から第１所定開度開く。 As shown in FIG. 8, when the operation command is the internal drying operation, the streamer discharge unit 30 (shown in FIGS. 1 to 3) is turned on in the first period t1, and the horizontal flap 31 is driven by the horizontal flap drive motor 32. The first predetermined opening is opened from the fully closed state.

次に、期間ｔ２において、水平フラップ３１を第２所定開度(＞第１所定開度)開くと共に、室内ファン１２を駆動して、室内空気を室内機１の風通路を介して循環させる送風運転を行う。 Next, in the period t2, the horizontal flap 31 is opened by the second predetermined opening (> the first predetermined opening), the indoor fan 12 is driven, and the indoor air is circulated through the air passage of the indoor unit 1. Drive.

次に、期間ｔ３において、室内ファン１２を止めて送風運転を停止すると共に、水平フラップ３１を全閉にする。 Next, in a period t3, the indoor fan 12 is stopped to stop the blowing operation, and the horizontal flap 31 is fully closed.

次に、期間ｔ４において、再び室内ファン１２を駆動して、室内空気を室内機１の風通路を介して循環させる送風運転を行う。このとき、室内ファン１２の回転数を期間ｔ２のときよりも高くしている。 Next, in the period t4, the indoor fan 12 is driven again to perform the blowing operation of circulating the indoor air through the air passage of the indoor unit 1. At this time, the rotation speed of the indoor fan 12 is set higher than that during the period t2.

次に、期間ｔ５において、室内ファン１２を止めて送風運転を停止すると共に、水平フラップ３１を全閉にする。この期間ｔ５の終了時点でストリーマ放電ユニット３０をオフする。 Next, in a period t5, the indoor fan 12 is stopped to stop the blowing operation, and the horizontal flap 31 is fully closed. At the end of this period t5, the streamer discharge unit 30 is turned off.

次に、期間ｔ６において、水平フラップ３１を全閉状態から第３所定開度(＜第１所定開度)開き、能力供給をオンにして暖房運転を行う。 Next, in the period t6, the horizontal flap 31 is opened from the fully closed state to the third predetermined opening (<first predetermined opening), the capacity supply is turned on, and the heating operation is performed.

次に、期間ｔ７において、水平フラップ３１を第２所定開度開いて、室内ファン１２を止めて送風運転を停止する。 Next, in a period t7, the horizontal flap 31 is opened by the second predetermined opening degree, the indoor fan 12 is stopped, and the blowing operation is stopped.

そして、期間ｔ７の終了時点で水平フラップ３１を全閉して、内部乾燥運転を終了する。 Then, at the end of the period t7, the horizontal flap 31 is fully closed and the internal drying operation is ended.

このようにして、室内ファン１２により室内熱交換器１１を介して室内空気を循環させる送風運転および室内熱交換器１１を凝縮器として機能させる暖房運転により室内機１の風通路内を乾燥させる。 In this way, the inside of the air passage of the indoor unit 1 is dried by the blowing operation of circulating the indoor air through the indoor heat exchanger 11 by the indoor fan 12 and the heating operation of causing the indoor heat exchanger 11 to function as a condenser.

上記空気調和機では、冷房除湿運転(第１除湿運転)後の内部乾燥運転において運転時間Ｔ１(＝ｔ１＋…＋ｔ７)を１００分とし、過絞り除湿運転(第３除湿運転)後の内部乾燥運転において、期間ｔ２を短縮して運転時間Ｔ３(＝ｔ１＋…＋ｔ７)を７５分とし、再熱除湿運転(第２除湿運転)後の内部乾燥運転において、期間ｔ２をさらに短縮して運転時間Ｔ２(＝ｔ１＋…＋ｔ７)を５５分としている。 In the above air conditioner, in the internal drying operation after the cooling dehumidifying operation (first dehumidifying operation), the operation time T1 (= t1 + ... + t7) is set to 100 minutes, and the internal drying operation after the over-squeezing dehumidifying operation (third dehumidifying operation) In the internal drying operation after the reheat dehumidifying operation (second dehumidifying operation), the operating time T3 (= t1 + ... + t7) is reduced to 75 minutes, and the operating time T2 is further reduced. = T1 + ... + t7) is 55 minutes.

なお、この第１実施形態では、運転時間Ｔ１を１００分,Ｔ３を７５分,Ｔ２を５５分としたが、空気調和機の構成に応じて適宜設定すればよい。 In the first embodiment, the operating time T1 is 100 minutes, T3 is 75 minutes, and T2 is 55 minutes, but it may be set appropriately according to the configuration of the air conditioner.

上記第１実施形態の空気調和機によれば、冷房除湿運転(第１除湿運転),過絞り除湿運転(第３除湿運転),再熱除湿運転(第２除湿運転)の複数の除湿モード夫々の運転後に行う内部乾燥運転において、異なる運転時間Ｔ１,Ｔ３,Ｔ２を用いることを可能としている。したがって、室内熱交換器１１をしっかり乾燥させることを優先する場合は、室内熱交換器１１の水滴量が多い除湿モードほど、その除湿モードの運転後に行う内部乾燥運転を長くすることで、室内機１の風通路内が確実に乾燥されるようにする。これにより、除湿モードに応じて内部乾燥運転の時間を適正化できる。なお、室内熱交換器１１の水滴量は、室内環境や運転時間によって異なるが、冷房除湿運転(第１除湿運転)をＨ１、過絞り除湿運転(第３除湿運転)をＨ３、再熱除湿運転(第２除湿運転)をＨ２とすると、各運転おける室内熱交換器１１の水滴量は、
Ｈ１＞Ｈ３＞Ｈ２
となっている。 According to the air conditioner of the first embodiment, each of the plurality of dehumidifying modes of the cooling dehumidifying operation (first dehumidifying operation), the over-throttle dehumidifying operation (third dehumidifying operation), and the reheat dehumidifying operation (second dehumidifying operation). It is possible to use different operation times T1, T3, T2 in the internal drying operation performed after the operation. Therefore, when it is prioritized to dry the indoor heat exchanger 11 firmly, the longer the internal drying operation performed after the operation in the dehumidifying mode is, the longer the dehumidifying mode in which the amount of water drops in the indoor heat exchanger 11 is large. Make sure that the inside of the air passage of 1 is dried. Thereby, the time of the internal drying operation can be optimized according to the dehumidification mode. Although the amount of water droplets in the indoor heat exchanger 11 varies depending on the indoor environment and the operating time, the cooling dehumidifying operation (first dehumidifying operation) is H1, the over-throttle dehumidifying operation (third dehumidifying operation) is H3, and the reheat dehumidifying operation is performed. When (second dehumidifying operation) is set to H2, the water droplet amount of the indoor heat exchanger 11 in each operation is
H1>H3> H2
Has become.

また、上記室内熱交換器１１の実質的に全部を蒸発域となる冷房除湿運転(第１除湿運転)の終了後の室内熱交換器１１に付着した水滴量が再熱除湿運転(第２除湿運転)よりも多いので、冷房除湿運転(第１除湿運転)後の内部乾燥運転の運転時間を長くして、冷房除湿運転(第１除湿運転)の終了後の室内機１の風通路内を確実に乾燥させることが可能になる。 In addition, the amount of water droplets adhering to the indoor heat exchanger 11 after the end of the cooling / dehumidifying operation (first dehumidifying operation) in which substantially all of the indoor heat exchanger 11 is in the evaporation region is the reheat dehumidifying operation (second dehumidifying operation). Operation), the operation time of the internal drying operation after the cooling / dehumidifying operation (first dehumidifying operation) is lengthened, and the inside of the air passage of the indoor unit 1 after the cooling / dehumidifying operation (first dehumidifying operation) is finished. It becomes possible to surely dry.

また、室内熱交換器１１に付着する水滴量が多い冷房除湿運転(第１除湿運転)、過絞り除湿運転(第３除湿運転)、再熱除湿運転(第２除湿運転)の順に、内部乾燥運転の運転時間が長短に設定されることで、室内熱交換器１１に付着した水滴量が多い除湿モードの運転で内部乾燥運転時間を長くできる。これにより、冷房除湿運転(第１除湿運転),過絞り除湿運転(第３除湿運転),再熱除湿運転(第２除湿運転)に応じて内部乾燥運転の時間を適正化できる。 Further, the internal drying is performed in the order of the cooling dehumidification operation (first dehumidification operation), the over-throttle dehumidification operation (third dehumidification operation), and the reheat dehumidification operation (second dehumidification operation) in which the amount of water droplets attached to the indoor heat exchanger 11 is large. By setting the operation time of the operation to be short or long, the internal drying operation time can be lengthened in the operation in the dehumidifying mode in which the amount of water droplets adhering to the indoor heat exchanger 11 is large. Thereby, the time of the internal drying operation can be optimized according to the cooling dehumidifying operation (first dehumidifying operation), the over-throttle dehumidifying operation (third dehumidifying operation), and the reheat dehumidifying operation (second dehumidifying operation).

また、過絞り除湿運転(第３除湿運転)の継続時間が第１所定時間(例えば１００分)未満のとき、すなわち、室内熱交換器１１に付着した水滴量が少ない短時間の過絞り除湿運転(第３除湿運転)では内部乾燥運転を行わないので、内部乾燥運転を効率よく行うことができる。また、再熱除湿運転(第２除湿運転)の継続時間が第２所定時間(例えば１００分)未満のとき、すなわち、室内熱交換器１１に付着した水滴量が少ない短時間の再熱除湿運転(第２除湿運転)では内部乾燥運転を行わないので、内部乾燥運転を効率よく行うことができる。 Further, when the duration of the over-throttle dehumidifying operation (third dehumidifying operation) is less than the first predetermined time (for example, 100 minutes), that is, the short-time over-throttle dehumidifying operation in which the amount of water droplets attached to the indoor heat exchanger 11 is small. Since the internal drying operation is not performed in (third dehumidifying operation), the internal drying operation can be efficiently performed. Further, when the duration of the reheat dehumidification operation (second dehumidification operation) is less than the second predetermined time (for example, 100 minutes), that is, the short-time reheat dehumidification operation in which the amount of water droplets adhering to the indoor heat exchanger 11 is small. Since the internal drying operation is not performed in the (second dehumidifying operation), the internal drying operation can be efficiently performed.

〔第２実施形態〕
本開示の第２実施形態の空気調和機は、制御装置１００の動作を除いて第１実施形態の空気調和機と同一の構成をしており、図１〜図８を援用する。 [Second Embodiment]
The air conditioner of the second embodiment of the present disclosure has the same configuration as the air conditioner of the first embodiment except for the operation of the control device 100, and FIGS. 1 to 8 are incorporated.

上記空気調和機では、冷房除湿運転(第１除湿運転)後の内部乾燥運転において運転時間Ｔ１(＝ｔ１＋…＋ｔ７)を５５分とし、過絞り除湿運転(第３除湿運転)後の内部乾燥運転において、期間ｔ２を長くして運転時間Ｔ３(＝ｔ１＋…＋ｔ７)を７５分とし、再熱除湿運転(第２除湿運転)後の内部乾燥運転において、期間ｔ２をさらに長くして運転時間Ｔ２(＝ｔ１＋…＋ｔ７)を１００分としている。 In the above air conditioner, the operation time T1 (= t1 + ... + t7) is set to 55 minutes in the internal drying operation after the cooling dehumidifying operation (first dehumidifying operation), and the internal drying operation after the over-squeezing dehumidifying operation (third dehumidifying operation) In the internal drying operation after the reheat dehumidifying operation (second dehumidifying operation), the operating time T3 (= t1 + ... + t7) is set to 75 minutes, and the operating time T2 is further extended. = T1 + ... + t7) is set to 100 minutes.

なお、この第１実施形態では、運転時間Ｔ１を５５分,Ｔ３を７５分,Ｔ２を１００分としたが、空気調和機の構成に応じて適宜設定すればよい。 In the first embodiment, the operating time T1 is set to 55 minutes, T3 is set to 75 minutes, and T2 is set to 100 minutes, but it may be appropriately set according to the configuration of the air conditioner.

上記第２実施形態の空気調和機によれば、冷房除湿運転(第１除湿運転),過絞り除湿運転(第３除湿運転),再熱除湿運転(第２除湿運転)の複数の除湿モード夫々の運転後に行う内部乾燥運転において、異なる運転時間Ｔ１,Ｔ３,Ｔ２を用いることを可能としている。したがって、室内熱交換器１１から室内への湿度戻りを少なくすることを優先する場合は、室内熱交換器１１の水滴量が多い除湿モードほど、その除湿モードの運転後に行う内部乾燥運転を短くすることで、室内へ湿気が戻るのを抑える。これにより、内部乾燥運転時の湿度戻りを抑制できる。なお、室内熱交換器１１の水滴量は、室内環境や運転時間によって異なるが、冷房除湿運転(第１除湿運転)をＨ１、過絞り除湿運転(第３除湿運転)をＨ３、再熱除湿運転(第２除湿運転)をＨ２とすると、各運転おける室内熱交換器１１の水滴量は、
Ｈ１＞Ｈ３＞Ｈ２
となっている。 According to the air conditioner of the second embodiment, each of the plurality of dehumidifying modes of the cooling dehumidifying operation (first dehumidifying operation), the over-throttle dehumidifying operation (third dehumidifying operation), and the reheat dehumidifying operation (second dehumidifying operation). It is possible to use different operation times T1, T3, T2 in the internal drying operation performed after the operation. Therefore, when priority is given to reducing the humidity return from the indoor heat exchanger 11 to the room, the dehumidifying mode in which the amount of water drops in the indoor heat exchanger 11 is large, the internal drying operation performed after the operation in the dehumidifying mode is shortened. This prevents moisture from returning to the room. Thereby, the humidity return during the internal drying operation can be suppressed. Although the amount of water droplets in the indoor heat exchanger 11 varies depending on the indoor environment and the operating time, the cooling dehumidifying operation (first dehumidifying operation) is H1, the over-throttle dehumidifying operation (third dehumidifying operation) is H3, and the reheat dehumidifying operation is performed. When (second dehumidifying operation) is set to H2, the water droplet amount of the indoor heat exchanger 11 in each operation is
H1>H3> H2
Has become.

また、上記冷房除湿運転(第１除湿運転)の終了後の室内熱交換器１１に付着した水滴量が再熱除湿運転(第２除湿運転)よりも多いので、室内熱交換器１１の水滴量が多い冷房除湿運転(第１除湿運転)ほど、その冷房除湿運転(第１除湿運転)の運転後に行う内部乾燥運転を短くする。これにより、冷房除湿運転(第１除湿運転)の運転終了後の内部乾燥運転時の湿度戻りを抑制できる。 Further, since the amount of water droplets attached to the indoor heat exchanger 11 after the completion of the cooling / dehumidifying operation (first dehumidifying operation) is larger than that in the reheat dehumidifying operation (second dehumidifying operation), the amount of water droplets in the indoor heat exchanger 11 is increased. As the cooling / dehumidifying operation (first dehumidifying operation) increases, the internal drying operation performed after the cooling / dehumidifying operation (first dehumidifying operation) is shortened. As a result, it is possible to suppress humidity return during the internal drying operation after the operation of the cooling dehumidifying operation (first dehumidifying operation).

また、上記室内熱交換器１１に付着した水滴量が少ない再熱除湿運転(第２除湿運転)、過絞り除湿運転(第３除湿運転)、冷房除湿運転(第１除湿運転)の順に、内部乾燥運転の運転時間を長短に設定することで、冷房除湿運転(第１除湿運転),過絞り除湿運転(第３除湿運転),再熱除湿運転(第２除湿運転)の運転終了後の内部乾燥運転時の湿度戻りを抑制できる。 In addition, the reheat dehumidifying operation (second dehumidifying operation), the over-throttle dehumidifying operation (third dehumidifying operation), and the cooling dehumidifying operation (first dehumidifying operation) are performed in this order in the order that the amount of water droplets attached to the indoor heat exchanger 11 is small. By setting the operating time of the dry operation to long or short, the internal after the operation of the cooling dehumidifying operation (first dehumidifying operation), over-throttle dehumidifying operation (third dehumidifying operation), reheat dehumidifying operation (second dehumidifying operation) Humidity return during dry operation can be suppressed.

また、過絞り除湿運転(第３除湿運転)の継続時間が第１所定時間(例えば１００分)未満のとき、すなわち、室内熱交換器１１に付着した水滴量が少ない短時間の過絞り除湿運転(第３除湿運転)では内部乾燥運転を行わないので、内部乾燥運転を効率よく行うことができる。また、再熱除湿運転(第２除湿運転)の継続時間が第２所定時間(例えば１００分)未満のとき、すなわち、室内熱交換器１１に付着した水滴量が少ない短時間の再熱除湿運転(第２除湿運転)では内部乾燥運転を行わないので、内部乾燥運転を効率よく行うことができる。 Further, when the duration of the over-throttle dehumidifying operation (third dehumidifying operation) is less than the first predetermined time (for example, 100 minutes), that is, the short-time over-throttle dehumidifying operation in which the amount of water droplets adhering to the indoor heat exchanger 11 is small. Since the internal drying operation is not performed in (third dehumidifying operation), the internal drying operation can be efficiently performed. Further, when the duration of the reheat dehumidification operation (second dehumidification operation) is less than the second predetermined time (for example, 100 minutes), that is, the short-time reheat dehumidification operation in which the amount of water droplets adhering to the indoor heat exchanger 11 is small. Since the internal drying operation is not performed in the (second dehumidifying operation), the internal drying operation can be efficiently performed.

〔第３実施形態〕
本開示の第３実施形態の空気調和機は、加湿装置(図示せず)と内部乾燥運転の動作を除いて第１実施形態の空気調和機と同一の構成をしており、図１〜図７を援用する。 [Third Embodiment]
The air conditioner of the third embodiment of the present disclosure has the same configuration as the air conditioner of the first embodiment except for the operations of the humidifying device (not shown) and the internal drying operation. Incorporate 7.

この第３実施形態の空気調和機は、外部から加湿ホースを介して加湿空気を室内機１の風通路内に供給する加湿装置を備える。 The air conditioner of the third embodiment includes a humidifying device that externally supplies humidified air into the air passage of the indoor unit 1 via a humidifying hose.

図９は、内部乾燥運転を説明するタイミングチャートである。 FIG. 9 is a timing chart explaining the internal drying operation.

図９に示すように、運転指令が内部乾燥運転となると、最初の期間ｔ１において、ストリーマ放電ユニット３０(図１〜図３に示す)をオンし、水平フラップ用駆動モータ３２により水平フラップ３１を全閉状態から第１所定開度開く。 As shown in FIG. 9, when the operation command is the internal drying operation, the streamer discharge unit 30 (shown in FIGS. 1 to 3) is turned on in the first period t1, and the horizontal flap drive motor 32 drives the horizontal flap 31. The first predetermined opening is opened from the fully closed state.

次に、期間ｔ２ａにおいて、水平フラップ３１を第２所定開度(＞第１所定開度)開くと共に、室内ファン１２を駆動して、室内空気を室内機１の風通路を介して循環させる送風運転を行う。ここで、加湿ホース乾燥指令により、加湿装置においてヒータで加熱された外気が加湿装置から加湿ホースを介して室内機１の風通路内に供給されることにより、加湿ホース内を乾燥させる。 Next, in the period t2a, the horizontal flap 31 is opened by the second predetermined opening (> the first predetermined opening) and the indoor fan 12 is driven to circulate the indoor air through the air passage of the indoor unit 1 Drive. Here, according to the humidifying hose drying command, the outside air heated by the heater in the humidifying device is supplied from the humidifying device to the inside of the air passage of the indoor unit 1 through the humidifying hose to dry the inside of the humidifying hose.

次に、期間ｔ２ｂにおいて、加湿装置を停止して、室内空気を室内機１の風通路を介して循環させる送風運転を続ける。 Next, in the period t2b, the humidifying device is stopped and the blowing operation of circulating the indoor air through the air passage of the indoor unit 1 is continued.

次に、期間ｔ４において、再び室内ファン１２を駆動して、室内空気を室内機１の風通路を介して循環させる送風運転を行う。このとき、室内ファン１２の回転数を期間ｔ２ａ,ｔ２ｂのときよりも高くしている。 Next, in the period t4, the indoor fan 12 is driven again to perform the blowing operation of circulating the indoor air through the air passage of the indoor unit 1. At this time, the rotation speed of the indoor fan 12 is set higher than that during the periods t2a and t2b.

上記第３実施形態の空気調和機において、第１実施形態と同様、室内熱交換器１１をしっかり乾燥させることを優先する場合は、冷房除湿運転(第１除湿運転)後の内部乾燥運転において運転時間Ｔ１(＝ｔ１＋…＋ｔ７)を１００分とし、過絞り除湿運転(第３除湿運転)後の内部乾燥運転において、期間ｔ２を短縮して運転時間Ｔ３(＝ｔ１＋…＋ｔ７)を７５分とし、再熱除湿運転(第２除湿運転)後の内部乾燥運転において、期間ｔ２を短縮して運転時間Ｔ２(＝ｔ１＋…＋ｔ７)を５５分としている。 In the air conditioner of the third embodiment, when priority is given to firmly drying the indoor heat exchanger 11, as in the first embodiment, the operation is performed in the internal drying operation after the cooling / dehumidifying operation (first dehumidifying operation). The time T1 (= t1 + ... + t7) is set to 100 minutes, and in the internal drying operation after the over-throttle dehumidification operation (third dehumidification operation), the period t2 is shortened to set the operation time T3 (= t1 + ... + t7) to 75 minutes, In the internal drying operation after the reheat dehumidifying operation (second dehumidifying operation), the period t2 is shortened and the operating time T2 (= t1 + ... + t7) is set to 55 minutes.

なお、第２実施形態と同様、室内熱交換器１１から室内への湿度戻りを少なくすることを優先する場合は、冷房除湿運転(第１除湿運転)後の内部乾燥運転において運転時間Ｔ１(＝ｔ１＋…＋ｔ７)を５５分とし、過絞り除湿運転(第３除湿運転)後の内部乾燥運転において、期間ｔ２を長くして運転時間Ｔ３(＝ｔ１＋…＋ｔ７)を７５分とし、再熱除湿運転(第２除湿運転)後の内部乾燥運転において、期間ｔ２を長くして運転時間Ｔ２(＝ｔ１＋…＋ｔ７)を１００分としてもよい。 As in the second embodiment, when priority is given to reducing the return of humidity from the indoor heat exchanger 11 to the room, the operation time T1 (= t1 + ... + t7) is set to 55 minutes, and in the internal drying operation after the over-throttle dehumidifying operation (third dehumidifying operation), the period t2 is lengthened to set the operation time T3 (= t1 + ... + t7) to 75 minutes and the reheat dehumidifying operation is performed. In the internal drying operation after (the second dehumidifying operation), the period t2 may be lengthened to set the operation time T2 (= t1 + ... + t7) to 100 minutes.

上記第１〜第３実施形態では、冷房除湿運転(第１除湿運転)と過絞り除湿運転(第３除湿運転)および再熱除湿運転(第２除湿運転)のそれぞれの終了後に内部乾燥運転を行ったが、過絞り除湿運転(第３除湿運転)のない空気調和機にこの発明を適用してもよい。この場合、冷房除湿運転(第１除湿運転)と再熱除湿運転(第２除湿運転)の終了後に、運転時間の異なる内部乾燥運転をそれぞれ行う。 In the first to third embodiments, the internal drying operation is performed after each of the cooling dehumidifying operation (first dehumidifying operation), the over-throttle dehumidifying operation (third dehumidifying operation) and the reheat dehumidifying operation (second dehumidifying operation). However, the present invention may be applied to an air conditioner that does not perform the over-throttle dehumidifying operation (third dehumidifying operation). In this case, after the cooling and dehumidifying operation (first dehumidifying operation) and the reheat dehumidifying operation (second dehumidifying operation) are completed, the internal drying operation with different operation times is performed.

また、第１〜第３実施形態では、ストリーマ放電ユニット３０を備えた空気調和機について説明したが、ストリーマ放電ユニットを備えていない空気調和機にこの発明を適用してもよい。 In addition, in the first to third embodiments, the air conditioner including the streamer discharge unit 30 has been described, but the present invention may be applied to an air conditioner that does not include the streamer discharge unit.

また、第１〜第３実施形態では、室内ファン１２により室内熱交換器１１を介して室内空気を循環させる送風運転および室内熱交換器１１を凝縮器として機能させる暖房運転により室内機１の風通路内を乾燥させる内部乾燥運転を行ったが、送風運転と暖房運転のうちの一方のみによる内部乾燥運転でもよい。 In addition, in the first to third embodiments, the wind of the indoor unit 1 is performed by the blowing operation in which the indoor fan 12 circulates the indoor air via the indoor heat exchanger 11 and the heating operation in which the indoor heat exchanger 11 functions as a condenser. Although the internal drying operation for drying the inside of the passage is performed, the internal drying operation may be performed by only one of the air blowing operation and the heating operation.

本開示の具体的な実施の形態について説明したが、本開示は上記第１〜第３実施形態に限定されるものではなく、本開示の範囲内で種々変更して実施することができる。 Although the specific embodiments of the present disclosure have been described, the present disclosure is not limited to the above first to third embodiments, and various modifications can be implemented within the scope of the present disclosure.

１…室内機
１ａ…吹出口
２…室外機
１０…ケーシング
１１…室内熱交換器
１１ａ…本体熱交換部
１１ａ−１…正面部
１１ａ−２…背面部
１１ｂ…補助熱交換部
１２…室内ファン
１３…電磁弁
２１…圧縮機
２２…四路切換弁
２３…室外熱交換器
２４…膨張弁(膨張機構)
２５…アキュムレータ
２６…室外ファン
３０…ストリーマ放電ユニット
３１…水平フラップ
３２…水平フラップ用駆動モータ
５１…室内熱交換器温度センサ
５２…室内温度センサ
５３…室内湿度センサ
５６…室外熱交換器温度センサ
５７…外気温度センサ
５８…冷媒温度センサ
１００…制御装置
１００ａ…冷房除湿運転制御部
１００ｂ…過絞り除湿運転制御部
１００ｃ…再熱除湿運転制御部
ＲＣ…冷媒回路 DESCRIPTION OF SYMBOLS 1 ... Indoor unit 1a ... Outlet 2 ... Outdoor unit 10 ... Casing 11 ... Indoor heat exchanger 11a ... Main body heat exchange part 11a-1 ... Front part 11a-2 ... Back part 11b ... Auxiliary heat exchange part 12 ... Indoor fan 13 ... solenoid valve 21 ... compressor 22 ... four-way switching valve 23 ... outdoor heat exchanger 24 ... expansion valve (expansion mechanism)
25 ... Accumulator 26 ... Outdoor fan 30 ... Streamer discharge unit 31 ... Horizontal flap 32 ... Horizontal flap drive motor 51 ... Indoor heat exchanger temperature sensor 52 ... Indoor temperature sensor 53 ... Indoor humidity sensor 56 ... Outdoor heat exchanger temperature sensor 57 ... outside air temperature sensor 58 ... refrigerant temperature sensor 100 ... control device 100a ... cooling dehumidification operation control section 100b ... over-throttle dehumidification operation control section 100c ... reheat dehumidification operation control section RC ... refrigerant circuit

Claims

A refrigerant circuit (RC) in which a compressor (21), an outdoor heat exchanger (23), an expansion mechanism (24) and an indoor heat exchanger (11) are annularly connected,
An indoor unit (1) having a casing (10) in which the indoor heat exchanger (11) is arranged in an air passage, and an indoor fan (12) arranged in the air passage of the casing (10). ,
The indoor unit (at least one of a blowing operation in which indoor air is circulated by the indoor fan (12) through the indoor heat exchanger (11) and a heating operation in which the indoor heat exchanger (11) functions as a condenser ( 1) A control device (100) for performing an internal drying operation for drying the inside of the air passage,
It is possible to operate in different dehumidification modes,
An air conditioner characterized in that the internal drying operation performed after each of the plurality of dehumidification modes can use different operation times depending on the plurality of different dehumidification modes.

The air conditioner according to claim 1,
One of the plurality of dehumidifying modes of operation is the first dehumidifying operation in which substantially all of the indoor heat exchanger (11) is in the evaporation region, and the other of which is in the condensing region in part of the indoor heat exchanger (11). And a second dehumidifying operation in which the remaining portion of the indoor heat exchanger (11) serves as an evaporation region,
An air conditioner, wherein the operating time of the internal drying operation after the first dehumidifying operation is longer than the operating time of the internal drying operation after the second dehumidifying operation.

The air conditioner according to claim 2,
The operation in the plurality of dehumidifying modes includes a third dehumidifying operation in which a part of the indoor heat exchanger (11) is in the evaporation region and the rest of the indoor heat exchanger (11) is in the overheating region. ,
The operating time of the internal drying operation after the third dehumidifying operation is shorter than the operating time of the internal drying operation after the first dehumidifying operation, and the operating time of the internal drying operation after the second dehumidifying operation. Air conditioner characterized by being longer than.

The air conditioner according to claim 1,
One of the plurality of dehumidifying modes of operation is the first dehumidifying operation in which substantially all of the indoor heat exchanger (11) is in the evaporation region, and the other of which is in the condensing region in part of the indoor heat exchanger (11). And a second dehumidifying operation in which the remaining portion of the indoor heat exchanger (11) serves as an evaporation region,
An air conditioner characterized in that the operating time of the internal drying operation after the first dehumidifying operation is shorter than the operating time of the internal drying operation after the second dehumidifying operation.

The air conditioner according to claim 4,
The operation in the plurality of dehumidifying modes includes a third dehumidifying operation in which a part of the indoor heat exchanger (11) is in the evaporation region and the rest of the indoor heat exchanger (11) is in the overheating region. ,
The operating time of the internal drying operation after the third dehumidifying operation is longer than the operating time of the internal drying operation after the first dehumidifying operation, and is longer than the operating time of the internal drying operation after the second dehumidifying operation. An air conditioner characterized by a short length.

The air conditioner according to claim 3 or 5,
When the duration of the third dehumidifying operation is the first predetermined time or longer, the internal drying operation is performed after the third dehumidifying operation,
An air conditioner, wherein the internal drying operation is performed after the second dehumidifying operation when the duration of the second dehumidifying operation is a second predetermined time or more.