JP6993213B2

JP6993213B2 - Drain water backflow prevention device

Info

Publication number: JP6993213B2
Application number: JP2017246541A
Authority: JP
Inventors: 浩彰八代
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2017-12-22
Filing date: 2017-12-22
Publication date: 2022-01-13
Anticipated expiration: 2037-12-22
Also published as: JP2019113240A

Description

本発明は、空気調和機等のドレン水の逆流防止のための動作を行うドレン水逆流防止装置に関する。 The present invention relates to a drain water backflow prevention device that operates for preventing backflow of drain water such as an air conditioner.

現在の住宅の多くは、高気密性を追求した設計となっており、そのような住宅には２４時間換気システムを設置することが義務付けられている。このような住宅において、炊事の際などに台所の換気扇を高速回転させると、室内の気圧は、著しく低下し、外気の気圧に対して負圧の状態となる。このように室内が負圧の状態では、空気調和機のドレンホースから外気が流れ込み、ドレン水が逆流する場合がある。 Many of today's homes are designed for high airtightness, and such homes are required to have a 24-hour ventilation system. In such a house, when the ventilation fan of the kitchen is rotated at high speed during cooking or the like, the atmospheric pressure in the room drops remarkably and becomes a negative pressure with respect to the atmospheric pressure of the outside air. In such a state of negative pressure in the room, outside air may flow from the drain hose of the air conditioner, and the drain water may flow back.

ドレン水の逆流防止策として、従来は、ドレンホースに逆止弁を取り付ける構成が一般的である。また、特許文献１では、ドレンホースにトラップ構造を設けることで逆流を防止しするようにしている。 Conventionally, as a measure to prevent backflow of drain water, a check valve is generally attached to the drain hose. Further, in Patent Document 1, a trap structure is provided in the drain hose to prevent backflow.

特許４５１９６９８号公報Japanese Patent No. 4519698

しかしながら、上記従来のように、ドレンホースに逆止弁を取り付ける構成は、次のような問題点を有している。すなわち、ドレンホース内のドレン水は、室内の負圧の状態が続くとドレンホース内に長期間溜まった状態となり、腐敗してスライム状になる。この場合、逆止弁は、腐敗したドレン水によって機能を損なわれる。 However, the configuration in which the check valve is attached to the drain hose as in the conventional case has the following problems. That is, if the negative pressure in the room continues, the drain water in the drain hose will be accumulated in the drain hose for a long period of time, and will rot and become slimy. In this case, the check valve is impaired by rotting drain water.

また、特許文献１のように、ドレンホースにトラップ部を設ける構成では、トラップ部のドレン水は、長期間溜まった状態になると、同様に腐敗する。このため、ドレンホースの詰まりやカビの発生等を生じる虞がある。 Further, in the configuration in which the trap portion is provided in the drain hose as in Patent Document 1, the drain water in the trap portion is similarly spoiled when it is in a state of being accumulated for a long period of time. Therefore, the drain hose may be clogged or mold may be generated.

一方、室内が負圧状態であることを検出し、室内にいる人や装置が室内の負圧状態を解消するための動作を行えば空気調和機のドレン水の逆流を防止することができる。 On the other hand, if it is detected that the room is in a negative pressure state and the person or device in the room performs an operation to eliminate the negative pressure state in the room, the backflow of the drain water of the air conditioner can be prevented.

したがって、本発明の一態様は、室内の負圧状態を検出し、ドレン水の逆流防止のための動作を行うドレン水逆流防止装置の提供を目的としている。 Therefore, one aspect of the present invention is to provide a drain water backflow prevention device that detects a negative pressure state in a room and operates for preventing backflow of drain water.

上記の課題を解決するために、本発明の一態様に係るドレン水逆流防止装置は、室外の気圧に対する室内の気圧の負圧状態を検出する負圧状態検出部と、前記負圧状態検出部が前記室内の負圧状態を検出したときに、前記室内に設けられたドレン水排出装置が排出するドレン水の逆流を防止するための動作を行う逆流防止対応部とを備え、前記負圧状態検出部は、一端部が前記室内に配置され、他端部が前記室外に配置された管状部材と、前記管状部材の内部に設けられたスイッチと、前記管状部材の内部に設けられ、前記室内の気圧が前記室外の気圧よりも低いときに、前記室内と前記室外との気圧差により前記スイッチの方向へ移動して前記スイッチと接触し、前記スイッチをオンにする移動部材とを備えている。
上記の課題を解決するために、本発明の一態様に係るドレン水逆流防止装置は、室外の気圧に対する室内の気圧の負圧状態を検出する負圧状態検出部と、前記負圧状態検出部が前記室内の負圧状態を検出したときに、前記室内に設けられたドレン水排出装置が排出するドレン水の逆流を防止するための動作を行う逆流防止対応部とを備え、前記負圧状態検出部は、一端部が前記室内に配置され、他端部が前記室外に配置された管状部材と、前記管状部材の内部に設けられたスイッチと、前記管状部材の内部に設けられ、前記室内の気圧が前記室外の気圧よりも低いときに、前記室内と前記室外との気圧差により前記スイッチの方向へ膨張し、前記スイッチに接触して前記スイッチをオンにする膨張部材とを備えている。
上記の課題を解決するために、本発明の一態様に係るドレン水逆流防止装置は、室外の気圧に対する室内の気圧の負圧状態を検出する負圧状態検出部と、前記負圧状態検出部が前記室内の負圧状態を検出したときに、前記室内に設けられたドレン水排出装置が排出するドレン水の逆流を防止するための動作を行う逆流防止対応部とを備え、前記負圧状態検出部は、前記室内の空気を前記室外に開放する開閉部に設けられ、前記開閉部の開閉を検出する開閉センサと、前記開閉センサおよび前記室内に設けられた換気扇と通信し、前記換気扇が回転中であり、かつ前記開閉センサが前記開閉部の閉状態を検出した場合に、前記室内が負圧状態と判定する負圧状態判定部とを備えている。
上記の課題を解決するために、本発明の一態様に係るドレン水逆流防止装置は、室外の気圧に対する室内の気圧の負圧状態を検出する負圧状態検出部と、前記負圧状態検出部が前記室内の負圧状態を検出したときに、前記室内に設けられたドレン水排出装置が排出するドレン水の逆流を防止するための動作を行う逆流防止対応部とを備え、前記負圧状態検出部は、前記室内の空気調和機および換気扇と通信し、前記空気調和機が運転中であり、かつ前記換気扇が回転中である場合に、前記室内が負圧状態と判定する負圧状態判定部を備えている。
上記の課題を解決するために、本発明の一態様に係るドレン水逆流防止装置は、室外の気圧に対する室内の気圧の負圧状態を検出する負圧状態検出部と、前記負圧状態検出部が前記室内の負圧状態を検出したときに、前記室内に設けられたドレン水排出装置が排出するドレン水の逆流を防止するための動作を行う逆流防止対応部とを備え、前記逆流防止対応部は、前記室内が負圧状態であることを知らせ、かつ前記室内の空気を前記室外に開放する開閉部の開放を促す報知を行う負圧状態報知部と、前記負圧状態検出部が前記室内の負圧状態を検出したときに、前記負圧状態報知部を動作させる報知制御部とを備えている。
上記の課題を解決するために、本発明の一態様に係るドレン水逆流防止装置は、室外の気圧に対する室内の気圧の負圧状態を検出する負圧状態検出部と、前記負圧状態検出部が前記室内の負圧状態を検出したときに、前記室内に設けられたドレン水排出装置が排出するドレン水の逆流を防止するための動作を行う逆流防止対応部とを備え、前記ドレン水排出装置は空気調和機であり、前記逆流防止対応部は、前記室内の空気調和機が運転中であるかどうかの情報を取得する情報取得部と、前記負圧状態検出部が前記室内の負圧状態を検出し、かつ前記空気調和機が運転中である場合に、前記空気調和機が発生するドレン水の量を減少させるように前記空気調和機を制御する空気調和機制御部とを備えている。 In order to solve the above problems, the drain water backflow prevention device according to one aspect of the present invention has a negative pressure state detection unit that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure, and the negative pressure state detection unit. The negative pressure is provided with a backflow prevention corresponding unit that operates to prevent the backflow of drain water discharged by the drain water discharge device provided in the room when the negative pressure state in the room is detected. The state detection unit is provided with a tubular member having one end arranged inside the room and the other end arranged outside the room, a switch provided inside the tubular member, and the inside of the tubular member. When the indoor air pressure is lower than the outdoor air pressure, the moving member that moves in the direction of the switch due to the pressure difference between the indoor and outdoor areas and comes into contact with the switch to turn on the switch is provided . There is.
In order to solve the above problems, the drain water backflow prevention device according to one aspect of the present invention has a negative pressure state detection unit that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure, and the negative pressure state detection unit. The negative pressure state is provided with a backflow prevention corresponding unit that operates to prevent the backflow of drain water discharged by the drain water discharge device provided in the room when the negative pressure state in the room is detected. The detection unit is provided with a tubular member having one end arranged inside the room and the other end arranged outside the room, a switch provided inside the tubular member, and the inside of the tubular member, and the detection unit is provided inside the room. It is provided with an expansion member that expands in the direction of the switch due to the pressure difference between the indoor and the outdoor when the atmospheric pressure of the outdoor is lower than the atmospheric pressure of the outdoor, and contacts the switch to turn on the switch. ..
In order to solve the above problems, the drain water backflow prevention device according to one aspect of the present invention has a negative pressure state detection unit that detects the negative pressure state of the indoor pressure with respect to the outdoor pressure, and the negative pressure state detection unit. The negative pressure state is provided with a backflow prevention corresponding unit that operates to prevent the backflow of the drain water discharged by the drain water discharge device provided in the room when the negative pressure state in the room is detected. The detection unit is provided in the opening / closing unit that opens the air in the room to the outside of the room, and communicates with the opening / closing sensor for detecting the opening / closing of the opening / closing unit, the opening / closing sensor, and the ventilation fan provided in the room, and the ventilation fan operates. It is provided with a negative pressure state determining unit that determines that the room is in a negative pressure state when the opening / closing sensor detects the closed state of the opening / closing unit while it is rotating.
In order to solve the above problems, the drain water backflow prevention device according to one aspect of the present invention has a negative pressure state detection unit that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure, and the negative pressure state detection unit. The negative pressure state is provided with a backflow prevention corresponding unit that operates to prevent the backflow of the drain water discharged by the drain water discharge device provided in the room when the negative pressure state in the room is detected. The detection unit communicates with the air conditioner and the ventilation fan in the room, and determines the negative pressure state in which the room is determined to be in a negative pressure state when the air conditioner is in operation and the ventilation fan is rotating. It has a part.
In order to solve the above problems, the drain water backflow prevention device according to one aspect of the present invention has a negative pressure state detection unit that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure, and the negative pressure state detection unit. Is provided with a backflow prevention corresponding unit that operates to prevent the backflow of drain water discharged by the drain water discharge device provided in the room when the negative pressure state in the room is detected. The unit is a negative pressure state notification unit that notifies that the room is in a negative pressure state and prompts the opening / closing unit that opens the air in the room to the outside of the room, and the negative pressure state detection unit is said. It is provided with a notification control unit that operates the negative pressure state notification unit when a negative pressure state in the room is detected.
In order to solve the above problems, the drain water backflow prevention device according to one aspect of the present invention has a negative pressure state detection unit that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure, and the negative pressure state detection unit. The drain water discharge device provided in the room is provided with a backflow prevention corresponding unit that operates to prevent the backflow of the drain water discharged when the negative pressure state in the room is detected. The device is an air conditioner, the backflow prevention corresponding unit is an information acquisition unit that acquires information on whether or not the air conditioner in the room is in operation, and the negative pressure state detection unit is a negative pressure in the room. Provided with an air conditioner control unit that detects a state and controls the air conditioner so as to reduce the amount of drain water generated by the air conditioner when the air conditioner is in operation. There is.

本発明の一態様によれば、室内の負圧状態を検出し、ドレン水の逆流防止のための動作を行うことができる。 According to one aspect of the present invention, it is possible to detect a negative pressure state in a room and perform an operation for preventing backflow of drain water.

本発明の実施形態のドレン水逆流防止装置を備えた空気調和機を示す概略の側面図である。It is a schematic side view which shows the air conditioner provided with the drain water backflow prevention device of embodiment of this invention. 本発明の実施形態のドレン水逆流防止装置の構成を示すブロック図である。It is a block diagram which shows the structure of the drain water backflow prevention device of embodiment of this invention. 図３の（ａ）は、本発明の実施形態のドレン水逆流防止装置が備える負圧状態検出部の負圧の非検出状態を示す説明図、図３の（ｂ）は、図３の（ａ）に示した負圧状態検出部における負圧の検出状態を示す説明図である。FIG. 3A is an explanatory diagram showing a negative pressure non-detection state of the negative pressure state detection unit included in the drain water backflow prevention device according to the embodiment of the present invention, and FIG. 3B is FIG. It is explanatory drawing which shows the detection state of the negative pressure in the negative pressure state detection part shown in a). 図４の（ａ）は、本発明の他の実施形態のドレン水逆流防止装置が備える負圧状態検出部における負圧の非検出状態を示す説明図、図４の（ｂ）は、図４の（ａ）に示した負圧状態検出部における負圧の検出状態を示す説明図である。FIG. 4A is an explanatory diagram showing a negative pressure non-detection state in the negative pressure state detection unit included in the drain water backflow prevention device of another embodiment of the present invention, and FIG. 4B is FIG. 4; It is explanatory drawing which shows the detection state of the negative pressure in the negative pressure state detection part shown in (a). 本発明のさらに他の実施形態のドレン水逆流防止装置が備える負圧状態検出部の構成を示す説明図である。It is explanatory drawing which shows the structure of the negative pressure state detection part provided in the drain water backflow prevention device of still another embodiment of this invention. 図５に示した負圧状態検出部の構成を示すブロック図である。It is a block diagram which shows the structure of the negative pressure state detection part shown in FIG. 図６に示した負圧状態検出部の動作を示すフローチャートである。It is a flowchart which shows the operation of the negative pressure state detection part shown in FIG. 本発明のさらに他の実施形態のドレン水逆流防止装置が備える負圧状態検出部の構成を示すブロック図である。It is a block diagram which shows the structure of the negative pressure state detection part provided in the drain water backflow prevention device of still another embodiment of this invention. 図８に示した負圧状態検出部の動作を示すフローチャートである。It is a flowchart which shows the operation of the negative pressure state detection part shown in FIG. 本発明のさらに他の実施形態のドレン水逆流防止装置の構成を示すブロック図である。It is a block diagram which shows the structure of the drain water backflow prevention device of still another embodiment of this invention. 図１０に示した空気調和機制御部による、空気調和機の圧縮機の換気扇の回転速度に応じた回転速度の制御内容を説明する表である。It is a table explaining the control content of the rotation speed according to the rotation speed of the ventilation fan of the compressor of the air conditioner by the air conditioner control unit shown in FIG. 図１０に示したドレン水逆流防止装置の動作を示すフローチャートである。It is a flowchart which shows the operation of the drain water backflow prevention device shown in FIG. 図１０に示したドレン水逆流防止装置の他の動作を示すフローチャートである。It is a flowchart which shows the other operation of the drain water backflow prevention device shown in FIG.

〔実施形態１〕
（空気調和機１１の構成の概要）
本発明の実施形態について、以下に説明する。図１は本実施形態の空気調和機１１を示す概略の側面図である。 [Embodiment 1]
(Outline of the configuration of the air conditioner 11)
Embodiments of the present invention will be described below. FIG. 1 is a schematic side view showing the air conditioner 11 of the present embodiment.

図１に示すように、空気調和機（ドレン水排出装置）１１は、部屋１の壁２の上部に取り付けられている。空気調和機１１は、例えば冷房、暖房、除湿および送風の各機能等を備えている。空気調和機１１は、ドレンパン２１、ドレンホース２２および補助ホース（管状部材）２３を備えている。ドレンパン２１は空気調和機１１の内部に設けられ、空気調和機１１の内部にて発生したドレン水を受け入れる。ドレンホース２２は、ドレンパン２１内のドレン水を屋外へ排出する。このために、ドレンホース２２は、一端部がドレンパン２１に接続され、他端部が屋外へ引き出されている。補助ホース２３は、一端部が空気調和機１１の内部あるいは部屋１の内部に配置され、他端部がドレンホース２２と同様、屋外へ引き出されている。 As shown in FIG. 1, the air conditioner (drain water discharge device) 11 is attached to the upper part of the wall 2 of the room 1. The air conditioner 11 has, for example, cooling, heating, dehumidifying, and blowing functions. The air conditioner 11 includes a drain pan 21, a drain hose 22, and an auxiliary hose (tubular member) 23. The drain pan 21 is provided inside the air conditioner 11 and receives the drain water generated inside the air conditioner 11. The drain hose 22 discharges the drain water in the drain pan 21 to the outside. For this purpose, one end of the drain hose 22 is connected to the drain pan 21, and the other end is pulled out to the outside. One end of the auxiliary hose 23 is arranged inside the air conditioner 11 or the inside of the room 1, and the other end is pulled out to the outside like the drain hose 22.

（ドレン水逆流防止装置５１の構成）
図２は、本実施形態のドレン水逆流防止装置５１の構成を示すブロック図である。図２に示すように、ドレン水逆流防止装置５１は、負圧状態検出部３１および逆流防止対応部３２を有する。 (Structure of drain water backflow prevention device 51)
FIG. 2 is a block diagram showing the configuration of the drain water backflow prevention device 51 of the present embodiment. As shown in FIG. 2, the drain water backflow prevention device 51 has a negative pressure state detection unit 31 and a backflow prevention corresponding unit 32.

負圧状態検出部３１は、部屋１の室外の気圧に対する室内すなわち部屋１の内部の気圧の負圧状態を検出する。逆流防止対応部３２は、負圧状態検出部３１が部屋１の負圧状態を検出したときに、空気調和機１１のドレン水の逆流を防止するための動作を行う。 The negative pressure state detection unit 31 detects the negative pressure state of the air pressure inside the room, that is, inside the room 1 with respect to the air pressure outside the room 1. The backflow prevention corresponding unit 32 operates to prevent the backflow of the drain water of the air conditioner 11 when the negative pressure state detecting unit 31 detects the negative pressure state in the room 1.

（負圧状態検出部３１の構成）
図３の（ａ）は、本実施形態の負圧状態検出部３１における負圧の非検出状態を示す説明図、図３の（ｂ）は、図３の（ａ）に示した負圧状態検出部３１における負圧の検出状態を示す説明図である。 (Structure of Negative Pressure State Detection Unit 31)
FIG. 3A is an explanatory diagram showing a negative pressure non-detection state in the negative pressure state detection unit 31 of the present embodiment, and FIG. 3B is a negative pressure state shown in FIG. 3A. It is explanatory drawing which shows the detection state of the negative pressure in the detection part 31.

図３の（ａ）（ｂ）に示すように、負圧状態検出部３１は、補助ホース２３の内部に設けられ、揺動部材（移動部材）４１、係止部材４２、ばね取付け部材４３、圧縮ばね４４およびスイッチ４５を備えている。 As shown in FIGS. 3A and 3B, the negative pressure state detection unit 31 is provided inside the auxiliary hose 23, and has a swing member (moving member) 41, a locking member 42, and a spring mounting member 43. It includes a compression spring 44 and a switch 45.

揺動部材４１は、補助ホース２３を塞ぐ形状を有し、上端部を中心として搖動可能（回転可能）である。係止部材４２は、室外側への揺動部材４１の搖動を規制する。 The swing member 41 has a shape that closes the auxiliary hose 23, and is rotatable (rotatable) around the upper end portion. The locking member 42 regulates the swing of the rocking member 41 to the outdoor side.

ばね取付け部材４３は、揺動部材４１よりも室内側の位置に固定されている。圧縮ばね４４は、一端部が揺動部材４１の下部に取り付けられ、他端部がばね取付け部材４３に取り付けられている。圧縮ばね４４は、揺動部材４１を係止部材４２の方向へ押している。 The spring mounting member 43 is fixed at a position on the indoor side of the swing member 41. One end of the compression spring 44 is attached to the lower part of the swing member 41, and the other end of the compression spring 44 is attached to the spring attachment member 43. The compression spring 44 pushes the swing member 41 toward the locking member 42.

スイッチ４５は、揺動部材４１が室内側へ搖動したときに、揺動部材４１の下部が当接するとオンになり、揺動部材４１の下部が離れるとオフになる。 When the rocking member 41 swings toward the room, the switch 45 turns on when the lower part of the rocking member 41 comes into contact with the switch 45, and turns off when the lower part of the rocking member 41 separates.

（逆流防止対応部３２の構成）
本実施形態の逆流防止対応部３２は、例えば空気調和機１１に設けられており、報知制御部６１および負圧状態報知部６２を備えている。 (Structure of backflow prevention corresponding unit 32)
The backflow prevention corresponding unit 32 of the present embodiment is provided in, for example, the air conditioner 11, and includes a notification control unit 61 and a negative pressure state notification unit 62.

報知制御部６１は、例えばマイクロコンピュータからなり、負圧状態検出部３１が部屋１の負圧状態を検出し、スイッチ４５がオンになると、負圧状態報知部６２を動作させる。 The notification control unit 61 is composed of, for example, a microcomputer, and when the negative pressure state detection unit 31 detects the negative pressure state in the room 1 and the switch 45 is turned on, the negative pressure state notification unit 62 is operated.

負圧状態報知部６２は、音声あるいは表示またはそれら両方によって、室内が負圧状態であることを知らせ、かつ室内の空気を前記室外に開放する開閉部の開放を促す報知を部屋１に居る人に対して行う。したがって、負圧状態報知部６２は、音声によって報知する場合、音声信号出力部およびスピーカ等、音声発生のための構成を備える。また、負圧状態報知部６２は、表示によって報知する場合、液晶表示装置等の表示装置を備える。 The negative pressure state notification unit 62 is a person in the room 1 who notifies that the room is in a negative pressure state by voice, display, or both, and notifies the room 1 to open the opening / closing unit that releases the air in the room to the outside of the room. To do. Therefore, the negative pressure state notification unit 62 includes a configuration for generating voice, such as a voice signal output unit and a speaker, when notifying by voice. Further, the negative pressure state notification unit 62 includes a display device such as a liquid crystal display device when notifying by display.

（ドレン水逆流防止装置５１の動作）
上記の構成において、ドレン水逆流防止装置５１の動作について以下に説明する。部屋１が高気密性を有している場合に換気扇を高速回転させると、部屋１は負圧状態となる。 (Operation of drain water backflow prevention device 51)
In the above configuration, the operation of the drain water backflow prevention device 51 will be described below. When the ventilation fan is rotated at high speed when the room 1 has high airtightness, the room 1 is in a negative pressure state.

負圧状態検出部３１は、部屋１が所定値以上の負圧状態（以下、過負圧状態と称する）であることを検出する。負圧状態検出部３１は、部屋１が負圧状態でない場合、および負圧状態であっても所定値未満の負圧状態（以下、非過負圧状態と称する）である場合、図３の（ａ）に示したように、揺動部材４１は圧縮ばね４４に押されて係止部材４２に当接している。一方、負圧状態検出部３１は、部屋１が過負圧状態になると、室内側と室内側との圧力差によって、図３の（ｂ）に示したように、揺動部材４１が室内側へ回転し、スイッチ４５に当接する。これによりスイッチ４５がオンとなり、負圧状態検出部３１は部屋１が過負圧状態であることを検出する。 The negative pressure state detection unit 31 detects that the room 1 is in a negative pressure state (hereinafter, referred to as an over-negative pressure state) of a predetermined value or more. The negative pressure state detecting unit 31 is shown in FIG. 3 when the room 1 is not in the negative pressure state and when the room 1 is in the negative pressure state of less than a predetermined value (hereinafter referred to as the non-over-negative pressure state) even in the negative pressure state. As shown in (a), the swing member 41 is pushed by the compression spring 44 and is in contact with the locking member 42. On the other hand, in the negative pressure state detection unit 31, when the room 1 is in the excessive negative pressure state, the rocking member 41 is on the indoor side as shown in FIG. 3B due to the pressure difference between the indoor side and the indoor side. Rotates to and abuts on the switch 45. As a result, the switch 45 is turned on, and the negative pressure state detection unit 31 detects that the room 1 is in the excessive negative pressure state.

逆流防止対応部３２の報知制御部６１は、負圧状態検出部３１のスイッチ４５がオンになると、負圧状態報知部６２を動作させる。負圧状態報知部６２は、部屋１が過負圧状態であること知らせ、窓やドアの開放を促す報知を行う。これにより、部屋１に居る人は、部屋１が過負圧状態であることを知り、窓またはドアを開放し、部屋１の過負圧状態が解消される。したがって、空気調和機１１のドレン水の逆流を防止することができる。 The notification control unit 61 of the backflow prevention response unit 32 operates the negative pressure state notification unit 62 when the switch 45 of the negative pressure state detection unit 31 is turned on. The negative pressure state notification unit 62 notifies that the room 1 is in an excessive negative pressure state, and notifies that the windows and doors are opened. As a result, the person in the room 1 knows that the room 1 is in the over-negative pressure state, opens the window or the door, and the over-negative pressure state of the room 1 is eliminated. Therefore, it is possible to prevent the backflow of the drain water of the air conditioner 11.

また、負圧状態検出部３１では、部屋１が過負圧状態となって揺動部材４１がスイッチ４５の方向へ搖動した場合に、補助ホース２３を通じて外気が室内側へ流入する。したがって、補助ホース２３を通じて室内側へ流入する外気の分だけ、ドレンホース２２を通じて流入する外気の量が減り、これによってもドレン水の逆流を抑制することができる。 Further, in the negative pressure state detection unit 31, when the room 1 is in the excessive negative pressure state and the swing member 41 swings in the direction of the switch 45, the outside air flows into the room side through the auxiliary hose 23. Therefore, the amount of the outside air flowing through the drain hose 22 is reduced by the amount of the outside air flowing into the room side through the auxiliary hose 23, and the backflow of the drain water can also be suppressed.

なお、本実施形態では、負圧状態検出部３１は、室内の過負圧状態を検出ものとした。しかしながら、負圧状態検出部３１は、室内の過負圧状態にかぎらず、負圧状態を検出するものであってもよい。この場合、逆流防止対応部３２は、負圧状態検出部３１がヘアの負圧状態を検出した場合に動作する。この点は、以下の他の実施形態においても同様である。 In this embodiment, the negative pressure state detection unit 31 detects the excessive negative pressure state in the room. However, the negative pressure state detection unit 31 is not limited to the over-negative pressure state in the room, and may detect the negative pressure state. In this case, the backflow prevention corresponding unit 32 operates when the negative pressure state detecting unit 31 detects the negative pressure state of the hair. This point is the same in the following other embodiments.

〔実施形態２〕
本発明の他の実施形態について、以下に説明する。なお、説明の便宜上、上記実施形態にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を繰り返さない。 [Embodiment 2]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals are given to the members having the same functions as the members described in the above-described embodiment, and the description thereof will not be repeated.

（ドレン水逆流防止装置５２の構成）
本実施形態のドレン水逆流防止装置５２は、図３の（ａ）（ｂ）に示した負圧状態検出部３１に代えて、図４の（ａ）（ｂ）に示す負圧状態検出部７１を備えている。ドレン水逆流防止装置５２の他の構成はドレン水逆流防止装置５１と同様である。 (Structure of drain water backflow prevention device 52)
The drain water backflow prevention device 52 of the present embodiment replaces the negative pressure state detecting unit 31 shown in FIGS. 3A and 3B with the negative pressure state detecting unit shown in FIGS. 4A and 4B. It is equipped with 71. Other configurations of the drain water backflow prevention device 52 are the same as those of the drain water backflow prevention device 51.

（負圧状態検出部７１の構成）
図４の（ａ）は、本実施形態の負圧状態検出部７１における負圧の非検出状態を示す説明図、図４の（ｂ）は、図４の（ａ）に示した負圧状態検出部７１における負圧の検出状態を示す説明図である。 (Structure of Negative Pressure State Detection Unit 71)
FIG. 4A is an explanatory diagram showing a negative pressure non-detection state in the negative pressure state detection unit 71 of the present embodiment, and FIG. 4B is a negative pressure state shown in FIG. 4A. It is explanatory drawing which shows the detection state of the negative pressure in the detection part 71.

図４の（ａ）（ｂ）に示すように、負圧状態検出部７１は、補助ホース２３の内部に設けられ、仕切板７２、膨張部材７３およびスイッチ７４を備えている。 As shown in FIGS. 4A and 4B, the negative pressure state detection unit 71 is provided inside the auxiliary hose 23, and includes a partition plate 72, an expansion member 73, and a switch 74.

仕切板７２は、補助ホース２３を塞ぐ形状を有し、中心部に開口部７２ａが形成されている。膨張部材７３は、風船状の部材であり、仕切板７２の開口部７２ａに取り付けられ、室外側に対して室内側が負圧になった場合に膨らむようになっている。スイッチ７４は、膨らんだ膨張部材７３が当接するとオンになり、膨張部材７３が離れるとオフになる。 The partition plate 72 has a shape that closes the auxiliary hose 23, and an opening 72a is formed in the center thereof. The expansion member 73 is a balloon-shaped member, and is attached to the opening 72a of the partition plate 72 so as to expand when the indoor side has a negative pressure with respect to the outdoor side. The switch 74 turns on when the inflated member 73 comes into contact with it, and turns off when the inflatable member 73 separates.

（ドレン水逆流防止装置５２の動作）
上記の構成において、ドレン水逆流防止装置５２の動作について以下に説明する。負圧状態検出部７１は、過負圧状態でない場合、図４の（ａ）に示したように、膨張部材７３が萎んだ状態である。一方、負圧状態検出部７１は、過負圧状態になると、図４の（ｂ）に示したように、膨張部材７３が膨らんでスイッチ７４に当接する。これによりスイッチ７４がオンとなり、負圧状態検出部７１は部屋１が過負圧状態であることを検出する。 (Operation of drain water backflow prevention device 52)
In the above configuration, the operation of the drain water backflow prevention device 52 will be described below. When the negative pressure state detection unit 71 is not in the excessive negative pressure state, the expansion member 73 is in a deflated state as shown in FIG. 4A. On the other hand, in the negative pressure state detection unit 71, when the negative pressure state is reached, the expansion member 73 expands and comes into contact with the switch 74, as shown in FIG. 4B. As a result, the switch 74 is turned on, and the negative pressure state detection unit 71 detects that the room 1 is in the excessive negative pressure state.

逆流防止対応部３２は、前記実施形態の場合と同じ動作を行い、部屋１に居る人は、部屋１が過負圧状態であることを知り、部屋１の開閉部（窓またはドア）を開放し、部屋１の過負圧状態が解消される。したがって、空気調和機１１のドレン水の逆流を防止することができる。 The backflow prevention response unit 32 performs the same operation as in the case of the above embodiment, and the person in the room 1 knows that the room 1 is in an overnegative pressure state and opens the opening / closing unit (window or door) of the room 1. Then, the excessive negative pressure state of the room 1 is eliminated. Therefore, it is possible to prevent the backflow of the drain water of the air conditioner 11.

また、負圧状態検出部７１は、仕切板７２および膨張部材７３が存在することにより、補助ホース２３内において外気と内気とを遮断している。したがって、補助ホース２３を通じて虫、ゴミあるいはほこり等が空気調和機１１の内部または部屋１の内部へ入り込む事態を防止することができる。 Further, the negative pressure state detection unit 71 shields the outside air from the inside air in the auxiliary hose 23 due to the presence of the partition plate 72 and the expansion member 73. Therefore, it is possible to prevent insects, dust, dust, and the like from entering the inside of the air conditioner 11 or the inside of the room 1 through the auxiliary hose 23.

また、湿度が非常に高い地方では、外気が部屋１の内部に入り込むことにより、ドレン水の発生量が著しく増加する。負圧状態検出部７１は、補助ホース２３を通じて外気が部屋１の中に入り込むことがないので、そのような地方に好適である。 Further, in a region where the humidity is very high, the amount of drain water generated is remarkably increased due to the outside air entering the inside of the room 1. The negative pressure state detection unit 71 is suitable for such a region because outside air does not enter the room 1 through the auxiliary hose 23.

〔実施形態３〕
本発明のさらに他の実施形態について、以下に説明する。なお、説明の便宜上、上記実施形態にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を繰り返さない。 [Embodiment 3]
Still other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals are given to the members having the same functions as the members described in the above-described embodiment, and the description thereof will not be repeated.

（ドレン水逆流防止装置５３の構成）
本実施形態のドレン水逆流防止装置５３（図２参照）は、図３の（ａ）（ｂ）に示した負圧状態検出部３１に代えて、図５に示す負圧状態検出部８１を備えている。ドレン水逆流防止装置５３の他の構成はドレン水逆流防止装置５１と同様である。 (Structure of drain water backflow prevention device 53)
The drain water backflow prevention device 53 (see FIG. 2) of the present embodiment uses the negative pressure state detection unit 81 shown in FIG. 5 instead of the negative pressure state detection unit 31 shown in FIGS. 3A and 3B. I have. Other configurations of the drain water backflow prevention device 53 are the same as those of the drain water backflow prevention device 51.

（負圧状態検出部８１の構成）
図５は、本実施形態の負圧状態検出部８１の構成を示す説明図である。図６は、本実施形態の負圧状態検出部８１の構成を示すブロック図である。 (Structure of Negative Pressure State Detection Unit 81)
FIG. 5 is an explanatory diagram showing the configuration of the negative pressure state detection unit 81 of the present embodiment. FIG. 6 is a block diagram showing the configuration of the negative pressure state detection unit 81 of the present embodiment.

図５に示すように、部屋１には空気調和機１１、換気扇１２、出入口ドア（開閉部）１３、窓（開閉部）１４およびベランダ出入口ドア（開閉部）１５が設けられている。換気扇１２は、低速から高速まで回転速度を複数段階に切り替え可能である。出入口ドア１３は部屋１への出入口のドアである。ベランダ出入口ドア１５はベランダへの出入口のドアである。出入口ドア１３、窓１４およびベランダ出入口ドア１５には、それらが閉状態であるか開状態であるかを検出する開閉センサ１６が設けられている。 As shown in FIG. 5, the room 1 is provided with an air conditioner 11, a ventilation fan 12, an entrance / exit door (open / close portion) 13, a window (open / close portion) 14, and a veranda entrance / exit door (open / close portion) 15. The ventilation fan 12 can switch the rotation speed from low speed to high speed in a plurality of stages. The doorway 13 is a doorway to the room 1. The balcony door 15 is a door for the door to the balcony. The doorway 13, the window 14, and the balcony doorway 15 are provided with an open / close sensor 16 for detecting whether they are closed or open.

図６に示すように、負圧状態検出部８１はサーバ８２および開閉センサ１６を備えている。換気扇１２および開閉センサ１６は、サーバ８２との通信機能を有し、サーバ８２は、換気扇１２および開閉センサ１６と通信する。 As shown in FIG. 6, the negative pressure state detection unit 81 includes a server 82 and an open / close sensor 16. The ventilation fan 12 and the open / close sensor 16 have a communication function with the server 82, and the server 82 communicates with the ventilation fan 12 and the open / close sensor 16.

（ドレン水逆流防止装置５３の動作）
上記の構成において、ドレン水逆流防止装置５３の動作について以下に説明する。図７は、負圧状態検出部８１の動作を示すフローチャートである。 (Operation of drain water backflow prevention device 53)
In the above configuration, the operation of the drain water backflow prevention device 53 will be described below. FIG. 7 is a flowchart showing the operation of the negative pressure state detection unit 81.

負圧状態検出動作において、負圧状態検出部８１のサーバ（負圧状態判定部、情報取得部）８２は、換気扇１２と通信し、換気扇１２が高速回転状態であるかどうかを判定する（Ｓ１１）。 In the negative pressure state detection operation, the server (negative pressure state determination unit, information acquisition unit) 82 of the negative pressure state detection unit 81 communicates with the ventilation fan 12 and determines whether or not the ventilation fan 12 is in the high-speed rotation state (S11). ).

Ｓ１１の判定結果がＹＥＳの場合、サーバ８２は、各開閉センサ１６と通信し、いずれかの開閉センサ１６が開状態を検出しているかどうかを判定する（Ｓ１２）。 If the determination result in S11 is YES, the server 82 communicates with each open / close sensor 16 and determines whether or not any of the open / close sensors 16 has detected the open state (S12).

Ｓ１２の判定結果がＹＥＳであれば、サーバ８２は部屋１が過負圧状態と判定する（Ｓ１３）。なお、Ｓ１１とＳ１２との判定動作は、順序が逆であってもよい。 If the determination result in S12 is YES, the server 82 determines that the room 1 is in the overnegative pressure state (S13). The order of the determination operations of S11 and S12 may be reversed.

一方、Ｓ１１の判定結果がＮＯの場合、あるいはＳ１２の判定結果がＮＯの場合、サーバ８２は、部屋１が過負圧状態でないと判定する（Ｓ１４）。 On the other hand, if the determination result of S11 is NO, or if the determination result of S12 is NO, the server 82 determines that the room 1 is not in the overnegative pressure state (S14).

上記のように、換気扇１２が高速回転状態であり、かつ出入口ドア１３、窓１４およびベランダ出入口ドア１５のいずれもが閉状態であれば、部屋１は過負圧状態になっていると考えられる。このような状況の場合に、負圧状態検出部８１は過負圧状態と判定している。 As described above, if the ventilation fan 12 is in a high-speed rotation state and all of the door 13 and the window 14 and the balcony door 15 are closed, it is considered that the room 1 is in a hypernegative pressure state. .. In such a situation, the negative pressure state detection unit 81 determines that the negative pressure state is in an excessive negative pressure state.

逆流防止対応部３２は、前記実施形態の場合と同じ動作を行い、部屋１に居る人は、部屋１が過負圧状態であることを知り、窓またはドアを開放し、部屋１の過負圧状態が解消される。したがって、空気調和機１１のドレン水の逆流を防止することができる。 The backflow prevention response unit 32 performs the same operation as in the case of the above embodiment, and the person in the room 1 knows that the room 1 is in a negative pressure state, opens the window or the door, and causes the room 1 to be negative. The pressure state is eliminated. Therefore, it is possible to prevent the backflow of the drain water of the air conditioner 11.

なお、上述したサーバ８２の構成は、空気調和機１１が備えていてもよい。この場合にはサーバ８２が不要となる。 The configuration of the server 82 described above may be provided in the air conditioner 11. In this case, the server 82 becomes unnecessary.

また、本実施形態では、室内が過負圧状態（負圧状態）であると判定する場合の換気扇１２の条件を換気扇１２が高速回転とした。しかしながら、換気扇１２の条件は、例えば換気扇１２が回転速度の切り替えができない構成である場合など、換気扇１２が単に回転していることであってもよい。この点は、他の実施形態においても同様である。 Further, in the present embodiment, the condition of the ventilation fan 12 when it is determined that the room is in an excessive negative pressure state (negative pressure state) is that the ventilation fan 12 rotates at high speed. However, the condition of the ventilation fan 12 may be that the ventilation fan 12 is simply rotating, for example, when the ventilation fan 12 is configured so that the rotation speed cannot be switched. This point is the same in other embodiments.

〔実施形態４〕
本発明のさらに他の実施形態について、以下に説明する。なお、説明の便宜上、上記実施形態にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を繰り返さない。 [Embodiment 4]
Still other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals are given to the members having the same functions as the members described in the above-described embodiment, and the description thereof will not be repeated.

（ドレン水逆流防止装置５４の構成）
本実施形態のドレン水逆流防止装置５４（図２参照）は、図３の（ａ）（ｂ）に示したドレン水逆流防止装置５１に代えて、図８に示す負圧状態検出部９１を備えている。ドレン水逆流防止装置５４の他の構成はドレン水逆流防止装置５１と同様である。 (Structure of drain water backflow prevention device 54)
The drain water backflow prevention device 54 (see FIG. 2) of the present embodiment replaces the drain water backflow prevention device 51 shown in FIGS. 3 (a) and 3 (b) with a negative pressure state detecting unit 91 shown in FIG. I have. Other configurations of the drain water backflow prevention device 54 are the same as those of the drain water backflow prevention device 51.

（負圧状態検出部９１の構成）
図８は、本実施形態の負圧状態検出部９１の構成を示すブロック図である。図５および図８に示すように、負圧状態検出部９１はサーバ（負圧状態判定部、情報取得部）９２を備えている。空気調和機１１および換気扇１２は、サーバ９２との通信機能を有し、サーバ９２は、空気調和機１１および換気扇１２と通信する。 (Structure of Negative Pressure State Detection Unit 91)
FIG. 8 is a block diagram showing the configuration of the negative pressure state detection unit 91 of the present embodiment. As shown in FIGS. 5 and 8, the negative pressure state detection unit 91 includes a server (negative pressure state determination unit, information acquisition unit) 92. The air conditioner 11 and the ventilation fan 12 have a communication function with the server 92, and the server 92 communicates with the air conditioner 11 and the ventilation fan 12.

（ドレン水逆流防止装置５４の動作）
上記の構成において、ドレン水逆流防止装置５４の動作について以下に説明する。図９は、負圧状態検出部９１の動作を示すフローチャートである。 (Operation of drain water backflow prevention device 54)
In the above configuration, the operation of the drain water backflow prevention device 54 will be described below. FIG. 9 is a flowchart showing the operation of the negative pressure state detection unit 91.

負圧状態検出動作において、負圧状態検出部９１のサーバ９２は、空気調和機１１と通信し、空気調和機１１が運転中かどうかを判定する（Ｓ２１）。 In the negative pressure state detection operation, the server 92 of the negative pressure state detection unit 91 communicates with the air conditioner 11 and determines whether or not the air conditioner 11 is in operation (S21).

Ｓ２１の判定結果がＹＥＳの場合、サーバ９２は、換気扇１２と通信し、換気扇１２が高速回転状態であるかどうかを判定する（Ｓ２２）。 If the determination result of S21 is YES, the server 92 communicates with the ventilation fan 12 and determines whether or not the ventilation fan 12 is in the high-speed rotation state (S22).

Ｓ２２の判定結果がＹＥＳであれば、サーバ９２は部屋１が過負圧状態と判定する（Ｓ２３）。 If the determination result in S22 is YES, the server 92 determines that the room 1 is in the overnegative pressure state (S23).

一方、Ｓ２２の判定結果がＮＯの場合、サーバ９２は、部屋１が過負圧状態でないと判定する（Ｓ２４）。 On the other hand, when the determination result of S22 is NO, the server 92 determines that the room 1 is not in the overnegative pressure state (S24).

空気調和機１１が運転中であれば、出入口ドア１３、窓１４およびベランダ出入口ドア１５は通常閉じられており、換気扇１２が高速回転状態であれば、部屋１は過負圧状態になっていると考えられる。このような状況の場合に、負圧状態検出部９１は室内が過負圧状態であると判定する。 If the air conditioner 11 is in operation, the door 13 and the window 14 and the door 15 on the balcony are normally closed, and if the ventilation fan 12 is rotating at high speed, the room 1 is in an overnegative pressure state. it is conceivable that. In such a situation, the negative pressure state detection unit 91 determines that the room is in an excessive negative pressure state.

なお、上述したサーバ９２の構成は、空気調和機１１が備えていてもよい。この場合にはサーバ９２が不要となる。 The configuration of the server 92 described above may be provided in the air conditioner 11. In this case, the server 92 becomes unnecessary.

〔実施形態５〕
本発明のさらに他の実施形態について、以下に説明する。なお、説明の便宜上、上記実施形態にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を繰り返さない。 [Embodiment 5]
Still other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals are given to the members having the same functions as the members described in the above-described embodiment, and the description thereof will not be repeated.

（ドレン水逆流防止装置５５の構成）
図１０は、本実施形態のドレン水逆流防止装置５５の構成を示すブロック図である。図１０に示すように、ドレン水逆流防止装置５５は、負圧状態検出部３１および逆流防止対応部１０１を備えている。なお、負圧状態検出部３１に代えて負圧状態検出部７１，８１，９１のいずれかを備えていてもよい。 (Structure of drain water backflow prevention device 55)
FIG. 10 is a block diagram showing the configuration of the drain water backflow prevention device 55 of the present embodiment. As shown in FIG. 10, the drain water backflow prevention device 55 includes a negative pressure state detecting unit 31 and a backflow prevention corresponding unit 101. In addition, any of the negative pressure state detection units 71, 81, 91 may be provided instead of the negative pressure state detection unit 31.

（逆流防止対応部１０１の構成）
図１１は、空気調和機制御部１０２による、空気調和機１１の圧縮機の換気扇１２の回転速度に応じた回転速度の制御内容を説明する表である。なお、図１１は、逆流防止対応部１０１の制御内容の理解を容易にするために示したものであり、実際の設計において、図１１の数値を使用するとは限らない。 (Structure of backflow prevention corresponding unit 101)
FIG. 11 is a table for explaining the content of control of the rotation speed according to the rotation speed of the ventilation fan 12 of the compressor of the air conditioner 11 by the air conditioner control unit 102. Note that FIG. 11 is shown for facilitating the understanding of the control content of the backflow prevention corresponding unit 101, and the numerical values in FIG. 11 are not always used in the actual design.

逆流防止対応部１０１は、サーバ９２および空気調和機制御部１０２を備えている。サーバ９２は、通信機能を有する空気調和機１１および換気扇１２と通信し、換気扇１２が運転中か停止中かの情報、および運転中である場合の回転速度についての情報を取得する。 The backflow prevention response unit 101 includes a server 92 and an air conditioner control unit 102. The server 92 communicates with the air conditioner 11 and the ventilation fan 12 having a communication function, and acquires information on whether the ventilation fan 12 is operating or stopped, and information on the rotation speed when the ventilation fan 12 is operating.

空気調和機制御部１０２は、例えばマイクロコンピュータからなり、負圧状態検出部３１が部屋１の過負圧状態を検出した場合に、サーバ９２と通信し、換気扇１２に関する上記情報を取得する。この場合、換気扇１２が回転中であれば、換気扇１２の回転速度に応じて、ドレン水の発生が抑制されるように、空気調和機１１の圧縮機の回転速度を制御するか圧縮機を停止させる。 The air conditioner control unit 102 is composed of, for example, a microcomputer, and when the negative pressure state detection unit 31 detects the over-negative pressure state of the room 1, it communicates with the server 92 and acquires the above information regarding the ventilation fan 12. In this case, if the ventilation fan 12 is rotating, the rotation speed of the compressor of the air conditioner 11 is controlled or the compressor is stopped so that the generation of drain water is suppressed according to the rotation speed of the ventilation fan 12. Let me.

具体的には、図１１に示すように、空気調和機制御部１０２は、換気扇１２の停止時（空気調和機１１の通常運転時）における圧縮機の回転速度に対し、換気扇１２の回転速度が速いほど（換気扇の強弱の設定が強側であるほど）、圧縮機の回転速度の下げ幅が大きくなるように、空気調和機１１を制御する。 Specifically, as shown in FIG. 11, in the air conditioner control unit 102, the rotation speed of the ventilation fan 12 is higher than the rotation speed of the compressor when the ventilation fan 12 is stopped (normal operation of the air conditioner 11). The air conditioner 11 is controlled so that the faster the speed is (the stronger the setting of the strength of the ventilation fan is), the larger the decrease in the rotation speed of the compressor is.

（ドレン水逆流防止装置５３の動作）
上記の構成において、ドレン水逆流防止装置５５の動作について以下に説明する。図１２は、ドレン水逆流防止装置５５の動作を示すフローチャートである。 (Operation of drain water backflow prevention device 53)
In the above configuration, the operation of the drain water backflow prevention device 55 will be described below. FIG. 12 is a flowchart showing the operation of the drain water backflow prevention device 55.

空気調和機１１は、起動すると（Ｓ３１）、室温および設定温度等から、圧縮機の回転速度（Ｓ３２）を決定する。 When the air conditioner 11 is started (S31), the rotation speed (S32) of the compressor is determined from the room temperature, the set temperature, and the like.

次に、空気調和機制御部１０２は、負圧状態検出部３１が室内の過負圧状態を検出していると（Ｓ３３）、サーバ９２と通信し、換気扇１２が回転中であるかどうかを判定する（Ｓ３４）。 Next, when the negative pressure state detection unit 31 detects the over-negative pressure state in the room (S33), the air conditioner control unit 102 communicates with the server 92 to determine whether the ventilation fan 12 is rotating. Judgment (S34).

空気調和機制御部１０２は、Ｓ３４での判定の結果、換気扇１２が回転中であれば、換気扇１２の回転速度の設定を取得し、取得した換気扇１２の回転速度の設定と、圧縮機の現状の回転速度とを参照して、圧縮機の回転速度の低下分（低下させる回転数）を決定する（Ｓ３５）。 As a result of the determination in S34, the air conditioner control unit 102 acquires the setting of the rotation speed of the ventilation fan 12 if the ventilation fan 12 is rotating, sets the acquired rotation speed of the ventilation fan 12, and the current state of the compressor. With reference to the rotation speed of the compressor, the amount of decrease in the rotation speed of the compressor (the number of rotations to be reduced) is determined (S35).

次に、空気調和機制御部１０２は低下分を差し引いた回転速度にて圧縮機が回転するように空気調和機１１を制御する（Ｓ３６）。これにより、圧縮機は、回転速度が低下するか、あるいは停止する。 Next, the air conditioner control unit 102 controls the air conditioner 11 so that the compressor rotates at a rotation speed obtained by subtracting the decrease (S36). As a result, the compressor slows down or stops.

その後、Ｓ３６の制御開始から一定時間が経過するか（Ｓ３７）、ユーザにより空気調和機１１の運転状態がリセットされると（Ｓ３８）、Ｓ３２に戻って、空気調和機１１の運転停止の指示が入力されるまで、それ以下の動作を繰り返す。 After that, when a certain time elapses from the start of control of S36 (S37) or the operating state of the air conditioner 11 is reset by the user (S38), the process returns to S32 and an instruction to stop the operation of the air conditioner 11 is given. The operation below that is repeated until it is input.

上記のように、ドレン水逆流防止装置５５は、空気調和機１１および換気扇１２が運転状態であり、負圧状態検出部３１が過負圧状態を検出した場合に、換気扇１２の回転速度の設定に応じて、空気調和機１１の圧縮機の回転速度を低下させ、あるいは圧縮機を停止させるようにしている。これにより、空気調和機１１でのドレン水の発生が抑制され、その結果、ドレン水の逆流を防止することができる。 As described above, the drain water backflow prevention device 55 sets the rotation speed of the ventilation fan 12 when the air conditioner 11 and the ventilation fan 12 are in the operating state and the negative pressure state detecting unit 31 detects the excessive negative pressure state. Depending on the situation, the rotation speed of the compressor of the air conditioner 11 is reduced or the compressor is stopped. As a result, the generation of drain water in the air conditioner 11 is suppressed, and as a result, the backflow of drain water can be prevented.

また、ドレン水逆流防止装置５５が備える逆流防止対応部１０１は、図２に示した逆流防止対応部３２が備える報知制御部６１および負圧状態報知部６２をさらに備えていてもよい。この場合のドレン水逆流防止装置５５の動作は、図１３のフローチャートのように、Ｓ４１の動作が加わった状態となる。Ｓ４１では、負圧状態報知部６２は、部屋１が過負圧状態であること、窓やドアを開放することを報知する。この場合、部屋１に居る人は、部屋１が過負圧状態であることを知り、部屋１の開閉部（窓またはドア）を開放し、部屋１の過負圧状態が解消され、空気調和機１１のドレン水の逆流を確実に防止することができる。 Further, the backflow prevention corresponding unit 101 included in the drain water backflow prevention device 55 may further include a notification control unit 61 and a negative pressure state notification unit 62 included in the backflow prevention corresponding unit 32 shown in FIG. In this case, the operation of the drain water backflow prevention device 55 is in a state where the operation of S41 is added as shown in the flowchart of FIG. In S41, the negative pressure state notification unit 62 notifies that the room 1 is in the excessive negative pressure state and that the windows and doors are opened. In this case, the person in the room 1 knows that the room 1 is in the over-negative pressure state, opens the opening / closing part (window or door) of the room 1, eliminates the over-negative pressure state of the room 1, and air-conditions. It is possible to reliably prevent the backflow of the drain water of the machine 11.

なお、本実施形態では、空気調和機制御部１０２は、負圧状態検出部３１が室内の負圧状態を検出した場合に、換気扇１２の回転速度が速いほど空気調和機１１の圧縮機の回転速度の低下の程度が大きくなるように、空気調和機１１を制御している。しかしながら、空気調和機制御部１０２は、負圧状態検出部３１が室内の負圧状態を検出し、空気調和機１１が運転中である場合に、空気調和機１１の圧縮機の回転速度が低下するように、空気調和機１１を制御する構成であってもよい。 In the present embodiment, when the negative pressure state detecting unit 31 detects the negative pressure state in the room, the air conditioner control unit 102 rotates the compressor of the air conditioner 11 as the rotation speed of the ventilation fan 12 increases. The air conditioner 11 is controlled so that the degree of decrease in speed becomes large. However, in the air conditioner control unit 102, when the negative pressure state detection unit 31 detects the negative pressure state in the room and the air conditioner 11 is in operation, the rotation speed of the compressor of the air conditioner 11 decreases. As such, the configuration may be such that the air conditioner 11 is controlled.

〔まとめ〕
本発明の態様１に係るドレン水逆流防止装置は、室外の気圧に対する室内の気圧の負圧状態を検出する負圧状態検出部３１と、前記負圧状態検出部３１が前記室内の負圧状態を検出したときに、前記室内に設けられた、ドレン水を排出するドレン水排出装置（例えば空気調和機１１）のドレン水の逆流を防止するための動作を行う逆流防止対応部３２とを備えている。〔summary〕
In the drain water backflow prevention device according to the first aspect of the present invention, the negative pressure state detecting unit 31 for detecting the negative pressure state of the indoor air pressure with respect to the outdoor air pressure and the negative pressure state detecting unit 31 are the negative pressure state in the room. Is provided with a backflow prevention corresponding unit 32 that operates to prevent the backflow of the drain water of the drain water discharge device (for example, the air conditioner 11) provided in the room when the above is detected. ing.

上記の構成によれば、逆流防止対応部３２は、負圧状態検出部３１が室内の負圧状態を検出したときに、ドレン水排出装置（例えば空気調和機１１）のドレン水の逆流を防止するための動作を行う。これにより、ドレン水排出装置のドレン水が室内の負圧状態によって室内へ逆流する事態を防止することができる。 According to the above configuration, the backflow prevention corresponding unit 32 prevents the backflow of drain water of the drain water discharge device (for example, the air conditioner 11) when the negative pressure state detection unit 31 detects the negative pressure state in the room. Do the action to do. As a result, it is possible to prevent the drain water of the drain water discharge device from flowing back into the room due to the negative pressure state in the room.

本発明の態様２に係るドレン水逆流防止装置は、上記態様１において、前記負圧状態検出部３１は、一端部が前記室内に配置され、他端部が前記室外に配置された管状部材（補助ホース２３）と、前記管状部材の内部に設けられたスイッチ４５と、前記管状部材の内部に設けられ、前記室内の気圧が前記室外の気圧よりも低いときに、前記室内と前記室外との気圧差により前記スイッチ４５の方向へ移動して前記スイッチ４５と接触し、前記スイッチ４５をオンにする移動部材（揺動部材４１）とを備えている。 In the drain water backflow prevention device according to the second aspect of the present invention, in the first aspect, the negative pressure state detecting unit 31 is a tubular member having one end arranged inside the room and the other end arranged outside the room. Auxiliary hose 23), a switch 45 provided inside the tubular member, and when the air pressure inside the tubular member is lower than the air pressure outside the room, the indoor and outdoor areas are used. It is provided with a moving member (swing member 41) that moves in the direction of the switch 45 due to the difference in atmospheric pressure, comes into contact with the switch 45, and turns on the switch 45.

上記の構成によれば、負圧状態検出部３１では、室内の気圧が室外の気圧よりも低いときに、移動部材が室内と室外との気圧差によりスイッチ４５の方向へ移動してスイッチ４５と接触し、スイッチ４５をオンにする。これにより、負圧状態検出部３１では、簡単な構成にて室内の負圧状態を検出することができる。 According to the above configuration, in the negative pressure state detection unit 31, when the indoor air pressure is lower than the outdoor air pressure, the moving member moves in the direction of the switch 45 due to the pressure difference between the indoor and outdoor areas, and the switch 45 and the switch 45. Contact and turn on switch 45. As a result, the negative pressure state detection unit 31 can detect the negative pressure state in the room with a simple configuration.

本発明の態様３に係るドレン水逆流防止装置は、上記態様１において、前記負圧状態検出部７１は、一端部が前記室内に配置され、他端部が前記室外に配置された管状部材（補助ホース２３）と、前記管状部材の内部に設けられたスイッチ７４と、前記管状部材の内部に設けられ、前記室内の気圧が前記室外の気圧よりも低いときに、前記室内と前記室外との気圧差により前記スイッチ７４の方向へ膨張し、前記スイッチ７４に接触して前記スイッチ７４をオンにする膨張部材７３とを備えている。 In the drain water backflow prevention device according to the third aspect of the present invention, in the first aspect, the negative pressure state detecting unit 71 is a tubular member having one end arranged inside the room and the other end arranged outside the room. The auxiliary hose 23), the switch 74 provided inside the tubular member, and the indoor and outdoor areas when the indoor air pressure is lower than the outdoor air pressure provided inside the tubular member. It is provided with an expansion member 73 that expands in the direction of the switch 74 due to a pressure difference and comes into contact with the switch 74 to turn on the switch 74.

上記の構成によれば、前記負圧状態検出部７１では、室内の気圧が室外の気圧よりも低いときに、膨張部材７３が室内と室外との気圧差によりスイッチ７４の方向へ膨張し、スイッチ７４に接触してスイッチ７４をオンにする。 According to the above configuration, in the negative pressure state detection unit 71, when the indoor air pressure is lower than the outdoor air pressure, the expansion member 73 expands in the direction of the switch 74 due to the pressure difference between the indoor and outdoor areas, and the switch. Contact 74 to turn on switch 74.

これにより、負圧状態検出部７１では、簡単な構成にて室内の負圧状態を検出することができる。また、負圧状態検出部７１では、管状部材内において膨張部材７３により外気と内気とを遮断することができるので、管状部材を通じて虫、ゴミあるいはほこり等がドレン水排出装置（例えば空気調和機１１）の内部または室内へ入り込む事態を防止することができる。さらに、管状部材を介して湿度の高い外気が室内へ入り込む事態を防止することができる。 As a result, the negative pressure state detection unit 71 can detect the negative pressure state in the room with a simple configuration. Further, in the negative pressure state detection unit 71, since the outside air and the inside air can be blocked from each other by the expansion member 73 in the tubular member, insects, dust, dust and the like can be discharged through the tubular member to the drain water discharge device (for example, the air conditioner 11). ) Can be prevented from entering the inside or the room. Further, it is possible to prevent a situation in which high humidity outside air enters the room through the tubular member.

本発明の態様４に係るドレン水逆流防止装置は、上記態様１において、前記負圧状態検出部８１は、前記室内の空気を前記室外に開放する開閉部（出入口ドア１３、窓１４、ベランダ出入口ドア１５）に設けられ、前記開閉部の開閉を検出する開閉センサ１６と、前記開閉センサ１６および前記室内に設けられた換気扇１２と通信し、前記換気扇１２が回転中であり、かつ前記開閉センサ１６が前記開閉部の閉状態を検出した場合に、前記室内が負圧状態と判定する負圧状態判定部（サーバ８２）とを備えている。 In the drain water backflow prevention device according to the fourth aspect of the present invention, in the first aspect, the negative pressure state detection unit 81 is an opening / closing unit (door / exit door 13, window 14, veranda entrance / exit) that opens the air in the room to the outside of the room. The open / close sensor 16 provided on the door 15) for detecting the opening / closing of the opening / closing portion communicates with the opening / closing sensor 16 and the ventilation fan 12 provided in the room, and the ventilation fan 12 is rotating and the opening / closing sensor. 16 includes a negative pressure state determination unit (server 82) that determines that the room is in a negative pressure state when the closed state of the opening / closing unit is detected.

上記の構成によれば、負圧状態判定部は、開閉センサ１６および換気扇１２と通信し、換気扇１２が回転中であり、かつ開閉センサ１６が開閉部の閉状態を検出した場合に、室内が負圧状態と判定する。これにより、負圧状態検出部８１は、室内の負圧状態を適切に検出することができる。 According to the above configuration, the negative pressure state determination unit communicates with the open / close sensor 16 and the ventilation fan 12, and when the ventilation fan 12 is rotating and the open / close sensor 16 detects the closed state of the open / close portion, the room is closed. Judged as a negative pressure state. As a result, the negative pressure state detection unit 81 can appropriately detect the negative pressure state in the room.

本発明の態様５に係るドレン水逆流防止装置は、上記態様１において、前記負圧状態検出部９１は、前記室内の空気調和機１１および換気扇１２と通信し、前記空気調和機１１が運転中であり、かつ前記換気扇１２が回転中である場合に、前記室内が負圧状態と判定する負圧状態判定部（サーバ９２）を備えている。 In the drain water backflow prevention device according to the fifth aspect of the present invention, in the first aspect, the negative pressure state detecting unit 91 communicates with the air conditioner 11 and the ventilation fan 12 in the room, and the air conditioner 11 is in operation. The room is provided with a negative pressure state determination unit (server 92) that determines that the room is in a negative pressure state when the ventilation fan 12 is rotating.

上記の構成によれば、負圧状態判定部は、室内の空気調和機１１および換気扇１２と通信し、空気調和機１１が運転中であり、かつ換気扇１２が回転中である場合に、室内が負圧状態と判定する。この判定では、空気調和機１１が運転中であれば。開閉部（出入口ドア１３、窓１４、ベランダ出入口ドア１５）が閉状態であると見なし、この状態において換気扇１２が回転中であれば室内が負圧状態になると判断する。これにより、負圧状態検出部９１は、室内の負圧状態を適切に検出することができる。 According to the above configuration, the negative pressure state determination unit communicates with the air conditioner 11 and the ventilation fan 12 in the room, and when the air conditioner 11 is operating and the ventilation fan 12 is rotating, the room is closed. Judged as a negative pressure state. In this determination, if the air conditioner 11 is in operation. It is considered that the opening / closing part (doorway door 13, window 14, veranda doorway 15) is in a closed state, and if the ventilation fan 12 is rotating in this state, it is judged that the room is in a negative pressure state. As a result, the negative pressure state detection unit 91 can appropriately detect the negative pressure state in the room.

本発明の態様６に係るドレン水逆流防止装置は、上記態様１から５のいずれか１態様において、前記逆流防止対応部３２は、前記室内が負圧状態であることを知らせ、かつ前記室内の空気を前記室外に開放する開閉部（出入口ドア１３、窓１４、ベランダ出入口ドア１５）の開放を促す報知を行う負圧状態報知部６２と、前記負圧状態検出部３１が前記室内の負圧状態を検出したときに、前記負圧状態報知部６２を動作させる報知制御部６１とを備えている。 In the drain water backflow prevention device according to the sixth aspect of the present invention, in any one of the first to fifth aspects, the backflow prevention corresponding unit 32 notifies that the room is in a negative pressure state, and the room is in a negative pressure state. The negative pressure state notification unit 62 for notifying the opening / closing unit (doorway 13, window 14, veranda doorway 15) that opens the air to the outside of the room, and the negative pressure state detection unit 31 are the negative pressure in the room. It includes a notification control unit 61 that operates the negative pressure state notification unit 62 when a state is detected.

上記の構成によれば、報知制御部６１は、負圧状態検出部３１が室内の負圧状態を検出したときに、負圧状態報知部６２を動作させる。これにより、負圧状態報知部６２は、室内が負圧状態であることを知らせ、かつ開閉部の開放を促す報知を行う。これにより、負圧状態報知部６２の報知を受けた人は開閉部を開放することができ、室内の負圧状態を解消することができる。この結果、ドレン水排出装置（例えば空気調和機１１）のドレン水が室内へ逆流する事態を防止することができる。 According to the above configuration, the notification control unit 61 operates the negative pressure state notification unit 62 when the negative pressure state detection unit 31 detects the negative pressure state in the room. As a result, the negative pressure state notification unit 62 notifies that the room is in a negative pressure state and notifies that the opening / closing unit is opened. As a result, the person who receives the notification of the negative pressure state notification unit 62 can open the opening / closing unit, and can eliminate the negative pressure state in the room. As a result, it is possible to prevent the drain water of the drain water discharge device (for example, the air conditioner 11) from flowing back into the room.

本発明の態様７に係るドレン水逆流防止装置は、上記態様１から５のいずれか１態様において、前記ドレン水排出装置は空気調和機１１であり、前記逆流防止対応部３２は、前記室内の空気調和機１１と通信し、前記空気調和機１１が運転中であるかどうかの情報を取得する情報取得部（サーバ９２）と、前記負圧状態検出部３１が前記室内の負圧状態を検出し、かつ前記空気調和機１１が運転中である場合に、前記空気調和機１１の圧縮機の回転速度が低下するように、前記空気調和機１１を制御する空気調和機制御部１０２を備えている。 In the drain water backflow prevention device according to the seventh aspect of the present invention, in any one of the above aspects 1 to 5, the drain water discharge device is an air conditioner 11, and the backflow prevention corresponding unit 32 is in the room. The information acquisition unit (server 92) that communicates with the air conditioner 11 and acquires information on whether or not the air conditioner 11 is in operation, and the negative pressure state detection unit 31 detect the negative pressure state in the room. In addition, an air conditioner control unit 102 that controls the air conditioner 11 is provided so that the rotation speed of the compressor of the air conditioner 11 decreases when the air conditioner 11 is in operation. There is.

上記の構成によれば、空気調和機制御部１０２は、負圧状態検出部３１が室内の負圧状態を検出し、かつ空気調和機１１が運転中である場合に、空気調和機１１の圧縮機の回転速度が低下するように、空気調和機１１を制御する。 According to the above configuration, the air conditioner control unit 102 compresses the air conditioner 11 when the negative pressure state detection unit 31 detects the negative pressure state in the room and the air conditioner 11 is in operation. The air conditioner 11 is controlled so that the rotation speed of the machine decreases.

これにより、逆流防止対応部３２は、空気調和機１１が発生するドレン水の量を減少させることができる。この結果、空気調和機１１のドレン水が室内へ逆流する事態を防止することができる。 As a result, the backflow prevention corresponding unit 32 can reduce the amount of drain water generated by the air conditioner 11. As a result, it is possible to prevent the drain water of the air conditioner 11 from flowing back into the room.

本発明の態様８に係るドレン水逆流防止装置は、上記態様１から５のいずれか１態様において、前記ドレン水排出装置は空気調和機１１であり、前記逆流防止対応部３２は、前記室内の空気調和機１１および換気扇１２と通信し、前記空気調和機１１および前記換気扇１２が運転中であるかどうかの情報、並びに前記空気調和機１１の圧縮機および前記換気扇１２の回転速度の設定に関する情報を取得する情報取得部（サーバ９２）と、前記負圧状態検出部３１が前記室内の負圧状態を検出し、かつ前記空気調和機１１および前記換気扇１２が運転中である場合に、前記換気扇１２の回転速度が速いほど前記圧縮機の回転速度の低下の程度が大きくなるように、前記空気調和機１１を制御する空気調和機制御部１０２を備えている。 In the drain water backflow prevention device according to the eighth aspect of the present invention, in any one of the above aspects 1 to 5, the drain water discharge device is an air conditioner 11, and the backflow prevention corresponding unit 32 is in the room. Information on whether the air conditioner 11 and the ventilation fan 12 are in operation by communicating with the air conditioner 11 and the ventilation fan 12, and information on setting the rotation speed of the compressor of the air conditioner 11 and the ventilation fan 12. When the information acquisition unit (server 92) and the negative pressure state detecting unit 31 detect the negative pressure state in the room, and the air conditioner 11 and the ventilation fan 12 are in operation, the ventilation fan An air conditioner control unit 102 that controls the air conditioner 11 is provided so that the faster the rotation speed of the 12 is, the greater the degree of decrease in the rotation speed of the compressor.

上記の構成によれば、空気調和機制御部１０２は、負圧状態検出部３１が室内の負圧状態を検出し、かつ空気調和機１１および換気扇１２が運転中である場合に、換気扇１２の回転速度が速いほど空気調和機１１の圧縮機の回転速度の低下の程度が大きくなるように、空気調和機１１を制御する。 According to the above configuration, when the negative pressure state detecting unit 31 detects the negative pressure state in the room and the air conditioner 11 and the ventilation fan 12 are in operation, the air conditioner control unit 102 of the ventilation fan 12 The air conditioner 11 is controlled so that the faster the rotation speed, the greater the degree of decrease in the rotation speed of the compressor of the air conditioner 11.

これにより、逆流防止対応部３２では、換気扇１２の回転速度が速いほど、空気調和機１１の圧縮機の回転速度の低下の程度が大きくなり、空気調和機１１が発生するドレン水の量が減少する。この結果、空気調和機１１のドレン水が室内へ逆流する事態を防止することができる。 As a result, in the backflow prevention corresponding unit 32, the faster the rotation speed of the ventilation fan 12, the greater the degree of decrease in the rotation speed of the compressor of the air conditioner 11, and the smaller the amount of drain water generated by the air conditioner 11. do. As a result, it is possible to prevent the drain water of the air conditioner 11 from flowing back into the room.

本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。さらに、各実施形態にそれぞれ開示された技術的手段を組み合わせることにより、新しい技術的特徴を形成することができる。 The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Further, by combining the technical means disclosed in each embodiment, new technical features can be formed.

１部屋
１１空気調和機（ドレン水排出装置）
１２換気扇
１３出入口ドア（開閉部）
１４窓（開閉部）
１５ベランダ出入口ドア（開閉部）
１６開閉センサ
２１ドレンパン
２２ドレンホース
２３補助ホース（管状部材）
３１，７１，８１，９１負圧状態検出部
３２逆流防止対応部
４１揺動部材（移動部材）
４２係止部材
４３ばね取付け部材
４４圧縮ばね
４５，７４スイッチ
５１～５５ドレン水逆流防止装置
６１報知制御部
６２負圧状態報知部
７２仕切板
７３膨張部材
８２，９２サーバ（負圧状態判定部、情報取得部） 1 room 11 air conditioner (drain water discharge device)
12 Ventilation fan 13 Doorway (opening and closing part)
14 Window (opening and closing part)
15 Veranda entrance door (opening and closing part)
16 Open / close sensor 21 Drain pan 22 Drain hose 23 Auxiliary hose (tubular member)
31, 71, 81, 91 Negative pressure state detection unit 32 Backflow prevention response unit 41 Swing member (moving member)
42 Locking member 43 Spring mounting member 44 Compression spring 45,74 Switch 51-55 Drain water backflow prevention device 61 Notification control unit 62 Negative pressure status notification unit 72 Partition plate 73 Expansion member 82,92 Server (negative pressure status determination unit, Information acquisition department)

Claims

A negative pressure state detector that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure,
When the negative pressure state detection unit detects the negative pressure state in the room, the backflow prevention corresponding unit operates to prevent the backflow of the drain water discharged by the drain water discharge device provided in the room. Equipped with
The negative pressure state detection unit is
A tubular member having one end arranged inside the room and the other end placed outside the room.
A switch provided inside the tubular member and
Provided inside the tubular member, when the air pressure in the room is lower than the air pressure outside the room, the switch moves in the direction of the switch due to the pressure difference between the room and the outside and comes into contact with the switch. A drain water backflow prevention device characterized by having a moving member to turn on .

A negative pressure state detector that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure,
When the negative pressure state detection unit detects the negative pressure state in the room, the backflow prevention corresponding unit operates to prevent the backflow of the drain water discharged by the drain water discharge device provided in the room. Equipped with
The negative pressure state detection unit is
A tubular member having one end arranged inside the room and the other end placed outside the room.
A switch provided inside the tubular member and
Provided inside the tubular member, when the air pressure in the room is lower than the air pressure outside the room, the switch expands in the direction of the switch due to the pressure difference between the room and the outside, and comes into contact with the switch. A drain water backflow prevention device characterized by having an inflatable member to turn on .

A negative pressure state detector that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure,
When the negative pressure state detection unit detects the negative pressure state in the room, the backflow prevention corresponding unit operates to prevent the backflow of the drain water discharged by the drain water discharge device provided in the room. Equipped with
The negative pressure state detection unit is
An opening / closing sensor provided in the opening / closing portion that opens the indoor air to the outside of the room and detects the opening / closing of the opening / closing portion.
When the open / close sensor communicates with the ventilation fan provided in the room, the ventilation fan is rotating, and the open / close sensor detects the closed state of the open / close portion, the room is determined to be in a negative pressure state. A drain water backflow prevention device characterized by having a pressure state determination unit .

A negative pressure state detector that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure,
When the negative pressure state detection unit detects the negative pressure state in the room, the backflow prevention corresponding unit operates to prevent the backflow of the drain water discharged by the drain water discharge device provided in the room. Equipped with
The negative pressure state detecting unit communicates with the air conditioner and the ventilation fan in the room, and determines that the room is in the negative pressure state when the air conditioner is operating and the ventilation fan is rotating. A drain water backflow prevention device characterized by having a negative pressure state determination unit.

A negative pressure state detector that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure,
When the negative pressure state detection unit detects the negative pressure state in the room, the backflow prevention corresponding unit operates to prevent the backflow of the drain water discharged by the drain water discharge device provided in the room. Equipped with
The backflow prevention corresponding part is
A negative pressure state notification unit that notifies that the room is in a negative pressure state and prompts the opening / closing unit that opens the air in the room to the outside of the room.
A drain water backflow prevention device including a notification control unit that operates the negative pressure state notification unit when the negative pressure state detection unit detects a negative pressure state in the room .

A negative pressure state detector that detects the negative pressure state of the indoor air pressure with respect to the outdoor air pressure,
When the negative pressure state detection unit detects the negative pressure state in the room, the backflow prevention corresponding unit operates to prevent the backflow of the drain water discharged by the drain water discharge device provided in the room. Equipped with
The drain water discharge device is an air conditioner.
The backflow prevention corresponding part is
An information acquisition unit that acquires information on whether or not the air conditioner in the room is in operation,
The air conditioner so as to reduce the amount of drain water generated by the air conditioner when the negative pressure state detecting unit detects the negative pressure state in the room and the air conditioner is in operation. A drain water backflow prevention device characterized by having an air conditioner control unit that controls the air conditioner .

The air conditioner control unit reduces the rotation speed of the compressor of the air conditioner when the negative pressure state detecting unit detects the negative pressure state in the room and the air conditioner is in operation. The drain water backflow prevention device according to claim 6 , characterized in that the air conditioner is allowed to flow.

The information acquisition unit acquires information on whether or not the air conditioner and the ventilation fan in the room are in operation.
In the air conditioner control unit, when the negative pressure state detecting unit detects the negative pressure state in the room and the air conditioner and the ventilation fan are in operation, the faster the rotation speed of the ventilation fan, the more the said . The drain water backflow prevention device according to claim 6 , wherein the rotation speed of the compressor of the air conditioner is significantly reduced .