JP2014218187A - Vehicle air conditioner - Google Patents

Vehicle air conditioner Download PDF

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JP2014218187A
JP2014218187A JP2013099455A JP2013099455A JP2014218187A JP 2014218187 A JP2014218187 A JP 2014218187A JP 2013099455 A JP2013099455 A JP 2013099455A JP 2013099455 A JP2013099455 A JP 2013099455A JP 2014218187 A JP2014218187 A JP 2014218187A
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drain water
vehicle
drain
holding box
atmospheric pressure
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JP6091321B2 (en
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智巳 福井
Tomomi Fukui
智巳 福井
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D27/00—Heating, cooling, ventilating, or air-conditioning

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)

Abstract

PROBLEM TO BE SOLVED: To enable drainage of drain water while keeping airtightness without using electronic components.SOLUTION: A vehicle air conditioner comprises: a drain water reservoir 21 having an exhaust port 5 for drain water 9 and provided on a bottom of an air conditioner main body 100; an airtight holding box 1 provided to cover the exhaust port 5 of the drain water reservoir 21; a communication hole 6 provided in a side surface of the airtight holding box 1 and communicating an internal space of the air conditioner main body 100 with an internal space of the airtight holding box 1; a first air pressure shutoff valve 2 disposed at the exhaust port 5, opened in response to a positive pressure from an outside of a vehicle, and closed in response to a negative pressure from the outside of the vehicle; and a second air pressure shutoff valve 3 disposed at the communication hole 6 and closed in response to the positive pressure from the outside of the vehicle. The second air pressure shutoff valve 3 is opened by the drain water 9 to introduce this drain water 9 into the airtight holding box 1 if a level of the drain water 9 is equal to a preset water level in the drain water reservoir 21, and the first air pressure shutoff valve 2 discharges the drain water 9 in the airtight holding box 1 as indicated by numeral 10 when being opened.

Description

本発明は、気密構造を有する車両用空調装置に関する。   The present invention relates to a vehicle air conditioner having an airtight structure.

蒸発器によって発生するドレン水を屋外に排水する排水機構を備える住宅用の空調室内機においては、ドレンパン出口近傍にフロート式の弁体を配設し、ドレン水が溜まってくると、弁体がドレン水に浮いて上昇し、排水口が開いて排水できるようにしたものがある（例えば、特許文献１参照）。   In residential air conditioning indoor units equipped with a drainage mechanism that drains the drain water generated by the evaporator to the outside, a float type valve element is provided near the drain pan outlet, and when the drain water accumulates, the valve element There is one that floats and rises in drain water so that drainage can open and drain (see, for example, Patent Document 1).

また、住宅用の空気調和機において、ドレンパンの排水口に、電圧を印加すると変形して排水口を開く開閉蓋を設けたものがある（例えば、特許文献２参照）。   Some residential air conditioners are provided with an open / close lid that is deformed when a voltage is applied to the drain port of the drain pan and opens the drain port (for example, see Patent Document 2).

特開２０００-２２０８６１号公報（図１）Japanese Patent Laid-Open No. 2000-220861 (FIG. 1) 特開２００８-２５８７２号公報（図１〜図４）JP 2008-25872 A (FIGS. 1 to 4)

特許文献１，２に記載の技術では、室内の気密性をある程度高めることができる。しかしながら、走行速度が速く、トンネルなどを通過する車両においては、車両内と車両外との間で急激な圧力変動が生じるため、単一の弁体（又は開閉蓋）構造の特許文献１，２に記載の技術を適用することはできない。例えば、弁体や開閉蓋の開放時に車両がトンネルに進入すると車両外（＝空調機本体の外部）で正圧圧力変動が発生し、その影響が車両内に及び、耳が痛くなる、いわゆる「耳ツン現象」が発生する。   With the techniques described in Patent Documents 1 and 2, the indoor airtightness can be enhanced to some extent. However, in a vehicle having a high traveling speed and passing through a tunnel or the like, a sudden pressure fluctuation occurs between the inside of the vehicle and the outside of the vehicle. Therefore, Patent Documents 1 and 2 having a single valve body (or opening / closing lid) structure. The technology described in is not applicable. For example, when the vehicle enters the tunnel when the valve body or the opening / closing lid is opened, a positive pressure fluctuation occurs outside the vehicle (= outside of the air conditioner main body), the effect is inside the vehicle, and the ear becomes painful. The “ear-skin phenomenon” occurs.

そこで、空調機本体内の蒸発器によって発生するドレン水を、排水ポンプによって、排水管を介して強制的に排水することが行われている。排水ポンプは、仕様範囲の気密構造を保つために、排水管を一旦、一定の高さ位置まで延出させて折り返し、さらに下方でも上向きに折り返すことによって揚程を設け、かつトラップが形成されるようにしている。   Therefore, drain water generated by the evaporator in the air conditioner body is forcibly drained by a drain pump through a drain pipe. In order to maintain the airtight structure within the specified range, the drainage pump extends the drainage pipe to a certain height and then turns it back, and then turns it upwards to provide a lift and form a trap. I have to.

しかし、この場合には、電気部品である排水ポンプ用の電動機を使用するため、故障が発生した場合には、ドレン水の排水ができなくなり、空調を停止せざるを得なくなるという難点があった。   However, in this case, since the electric motor for the drainage pump, which is an electrical component, is used, if a failure occurs, the drain water cannot be drained and the air conditioning must be stopped. .

本発明は、前記のような課題を解決するためになされたもので、電気部品を使用することなく、気密を保持しつつ、ドレン水を排水できるようにすることを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to allow drain water to be drained while maintaining airtightness without using an electrical component.

本発明に係る車両用空気調和装置は、蒸発器を有する車両の空調機本体と、蒸発器によって発生したドレン水の排水口を有し、空調機本体の底部に設けられたドレン水受部と、ドレン水受部の排水口を覆うように設けられた気密保持箱と、気密保持箱の側面に設けられ、空調機本体の内部空間と気密保持箱の内部空間とを連通させる連通孔と、排水口に設置され、車両外部からの正圧圧力を受けて開かれ、車両外部からの負圧圧力を受けて閉じられる第１の気圧遮断弁と、連通孔に設置され、車両外部からの正圧圧力を受けて閉じられる第２の気圧遮断弁とを備え、第２の気圧遮断弁は、ドレン水受部のドレン水が予め設定された水位となれば、このドレン水によって開かれてこのドレン水を気密保持箱内に導入させ、第１の気圧遮断弁は、開かれた際に、気密保持箱内のドレン水を排水するものである。   A vehicle air conditioner according to the present invention includes a vehicle air conditioner body having an evaporator, a drain water receiving portion provided at the bottom of the air conditioner body, having a drain outlet for drain water generated by the evaporator. An airtight holding box provided so as to cover the drain port of the drain water receiving portion, a communication hole provided on a side surface of the airtight holding box, and communicating the internal space of the air conditioner body and the internal space of the airtight holding box; A first atmospheric pressure shut-off valve that is installed at the drainage port, opened by receiving a positive pressure pressure from the outside of the vehicle, and closed by receiving a negative pressure pressure from the outside of the vehicle, and a communication hole. A second atmospheric pressure shut-off valve that is closed under pressure, and the second atmospheric pressure shut-off valve is opened by the drain water when the drain water in the drain water receiving portion reaches a preset water level. Drain water is introduced into the airtight holding box, and the first atmospheric pressure cutoff valve is Upon him, it is to drain the drain water in the gas-tight seal box.

本発明に係る車両用空気調和装置においては、第１の気圧遮断弁２と第２の気圧遮断弁３が、車両外部の気圧の変動に対応して排水口又は連通孔を閉じるので、車両内の気密を保持することができる。
また、車両外部の圧力変動がない時、あるいは車両外部からの負圧圧力を受けて第１の気圧遮断弁が排水口を閉じている時は、第２の気圧遮断弁３が車両外部の圧力変動の影響を受けない。このため、ドレン水受部のドレン水が予め設定された水位となれば、このドレン水によって第２の気圧遮断弁が開かれ、このドレン水を気密保持箱内に導入することができる。気密保持箱内のドレン水は、第１の気圧遮断弁２が開かれる度、排水される。したがって、電気部品を使用することなく、車両内の気密を保持しつつ、気密保持箱内へのドレン水の導入、及び気密保持箱内のドレン水を排水することができる。 In the vehicle air conditioner according to the present invention, the first atmospheric pressure cutoff valve 2 and the second atmospheric pressure cutoff valve 3 close the drain port or the communication hole in response to fluctuations in atmospheric pressure outside the vehicle. The airtightness can be kept.
Further, when there is no pressure fluctuation outside the vehicle, or when the first atmospheric pressure cutoff valve closes the drain due to negative pressure from the outside of the vehicle, the second atmospheric pressure cutoff valve 3 Unaffected by fluctuations. For this reason, if the drain water in the drain water receiving unit reaches a preset water level, the drain water opens the second atmospheric pressure cutoff valve, and this drain water can be introduced into the airtight holding box. The drain water in the airtight holding box is drained every time the first atmospheric pressure cutoff valve 2 is opened. Therefore, it is possible to introduce the drain water into the airtight holding box and drain the drain water in the airtight holding box while maintaining the airtightness in the vehicle without using an electrical component.

本発明の実施形態に係る車両用空気調和装置の気密保持箱部の構成を示す模式図である。It is a mimetic diagram showing composition of an airtight maintenance box part of an air harmony device for vehicles concerning an embodiment of the present invention. 本発明の実施形態に係る車両用空気調和装置の車両外部に気圧の変動がない時の気密保持箱部の第１と第２の気圧遮断弁の動作を示す模式図である。It is a schematic diagram which shows operation | movement of the 1st and 2nd atmospheric pressure cutoff valve of an airtight holding | maintenance box part when there is no fluctuation | variation of atmospheric pressure outside the vehicle of the vehicle air conditioner which concerns on embodiment of this invention. 本発明の実施形態に係る車両用空気調和装置の車両外部に急激な正圧圧力変動があった時の気密保持箱内部の状態を示す模式図である。It is a schematic diagram which shows the state inside an airtight holding | maintenance box when there exists sudden positive pressure pressure fluctuation outside the vehicle of the vehicle air conditioner which concerns on embodiment of this invention.

以下、図示実施形態に基づき本発明の車両用空気調和装置を説明する。
図１は本発明の実施形態に係る車両用空気調和装置の気密保持箱部の構成を示す模式図である。図２は本発明の実施形態に係る車両用空気調和装置の車両外部に気圧の変動がない時の気密保持箱部の第１と第２の気圧遮断弁の動作を示す模式図である。図３は本発明の実施形態に係る車両用空気調和装置の車両外部に急激な正圧圧力変動があった時の気密保持箱内部の状態を示す模式図である。
本発明の実施形態に係る車両用空気調和装置は、空調機本体１００の内部に蒸発器２０と、蒸発器２０の周辺に、蒸発器２０によって発生したドレン水９を受けるドレン水受部２１と、排水口５とが設けられている。また、空調機本体１００のドレン水９の排水口５を覆うように密閉構造を有する気密保持箱１が設けられている。排水口５には、車両外部からの正圧圧力を受けて開かれ、車両外部からの負圧圧力を受けて閉じられる第１の気圧遮断弁２が設置されている。すなわち、第１の気圧遮断弁２は、ドレン水受部２１の上面における排水口５の周縁部に水平配置され、排水口５の一側に第１の水平方向の軸３１を介して取り付けられ、上向き（図１の時計回りＡ）に揺動した時に開かれるようになっている。また、第１の気圧遮断弁２は、その弁体の自由端の上面に、水と比べて比重が小さい（＝浮力が大きい）部品４が取り付けられ、全体として水よりも比重が小さくなるように、つまりフロート式のフラップ弁として構成されている。したがって、気密保持箱１内のドレン水９が予め設定された水位以上となれば、図２のように自由端側が浮上して上向き（図１の時計回りＡ）に回動し、開かれてドレン水９を排水１０する。 Hereinafter, the vehicle air conditioner of the present invention will be described based on the illustrated embodiment.
FIG. 1 is a schematic diagram showing a configuration of an airtight holding box portion of a vehicle air conditioner according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing the operation of the first and second air pressure shut-off valves of the airtight holding box when there is no fluctuation in air pressure outside the vehicle air conditioner according to the embodiment of the present invention. FIG. 3 is a schematic view showing a state inside the airtight holding box when there is a sudden positive pressure pressure fluctuation outside the vehicle of the vehicle air conditioner according to the embodiment of the present invention.
An air conditioner for a vehicle according to an embodiment of the present invention includes an evaporator 20 inside an air conditioner main body 100, and a drain water receiver 21 that receives drain water 9 generated by the evaporator 20 around the evaporator 20. A drainage port 5 is provided. In addition, an airtight holding box 1 having a sealed structure is provided so as to cover the drain port 5 of the drain water 9 of the air conditioner main body 100. The drain port 5 is provided with a first atmospheric pressure cutoff valve 2 that is opened by receiving a positive pressure pressure from the outside of the vehicle and closed by receiving a negative pressure pressure from the outside of the vehicle. That is, the first atmospheric pressure cutoff valve 2 is horizontally disposed at the peripheral edge of the drain port 5 on the upper surface of the drain water receiving unit 21 and is attached to one side of the drain port 5 via the first horizontal shaft 31. It is opened when it swings upward (clockwise A in FIG. 1). In addition, the first atmospheric pressure cutoff valve 2 is provided with a component 4 having a specific gravity smaller than water (= large buoyancy) on the upper surface of the free end of the valve body so that the specific gravity is smaller than that of water as a whole. In other words, it is configured as a float type flap valve. Therefore, when the drain water 9 in the airtight holding box 1 is equal to or higher than a preset water level, the free end surface is lifted and rotated upward (clockwise A in FIG. 1) and opened as shown in FIG. Drain water 9 is drained 10.

また、気密保持箱１の側面には、空調機本体１００の内部空間と当該気密保持箱１の内部空間とを連通させる連通孔６が形成されている。つまり、空調機本体１００の内部空間は、連通孔６、気密保持箱１、及び排水口５を介して車両外部空間に連通している。連通孔６には、車両外部からの正圧圧力を受けて閉じられる第２の気圧遮断弁３が設置されている。すなわち、第２の気圧遮断弁３は、気密保持箱１の内周面における連通孔６の周縁部に垂直配置され、連通孔６の上縁部に第２の水平方向の軸３２を介して取り付けられ、気密保持箱１の内部側（図１の時計回りＢ）に揺動した時に開かれるフラップ弁として構成されている。   Further, on the side surface of the airtight holding box 1, a communication hole 6 is formed for communicating the internal space of the air conditioner main body 100 and the internal space of the airtight holding box 1. That is, the internal space of the air conditioner main body 100 communicates with the vehicle exterior space via the communication hole 6, the airtight holding box 1, and the drain port 5. The communication hole 6 is provided with a second atmospheric pressure cutoff valve 3 that is closed by receiving a positive pressure pressure from the outside of the vehicle. That is, the second atmospheric pressure shut-off valve 3 is arranged vertically on the peripheral edge of the communication hole 6 on the inner peripheral surface of the airtight holding box 1, and is connected to the upper edge of the communication hole 6 via the second horizontal shaft 32. It is configured as a flap valve that is attached and opens when it swings to the inner side of the airtight holding box 1 (clockwise B in FIG. 1).

第１の気圧遮断弁２と第２の気圧遮断弁３とは、車両外部で、図１に白抜き矢印で示す正圧圧力変動７又は負圧圧力変動８が発生した場合に、排水口５又は連通孔６を閉じて、空調機本体１００の内部に外部気圧の影響が及ぶのを防止している。
すなわち、第１の気圧遮断弁２と第２の気圧遮断弁３とは、回転方向が圧力変動方向に応じて互いに逆向きとなるように設置されている。例えば、車両がトンネル内に進入し、車両外部で正圧圧力変動７が発生した場合は、空調機本体１００の内部と車両外部との間で気圧差が生じ、空調機本体１００の内部の圧力が車両外部の圧力よりも低くなる。この気圧差は、第１の気圧遮断弁２を開方向に回動させるように作用するが、第２の気圧遮断弁３には閉方向に回動させるように、あるいは閉状態の保持力として作用する。つまり、車両外部から正圧圧力変動７を受けたときは、第２の気圧遮断弁３によって空調機本体１００内の気密が保持される。また、この時、第１の気圧遮断弁２が浮上して開かれた状態となり、図２のように気密保持箱１内のドレン水９が排水口５から車両外部へ排水１０される。さらに、車両がトンネル内を通過する時に急激に変化する圧力変動によって、第１の気圧遮断弁２が排水口５からの圧力を受けて急激に回動するため、図３のように水しぶき２２が発生する。この水しぶき２２は、第１の気圧遮断弁２が気密保持箱１によって覆われているため、四方に飛び散ることがなく、空調機本体１００内の他の機器及び電線部に水しぶき２２が付着するようなことはない。 The first air pressure shut-off valve 2 and the second air pressure shut-off valve 3 are connected to the drain outlet 5 when a positive pressure fluctuation 7 or a negative pressure fluctuation 8 shown by a white arrow in FIG. Alternatively, the communication hole 6 is closed to prevent the external air pressure from affecting the inside of the air conditioner main body 100.
That is, the first atmospheric pressure cutoff valve 2 and the second atmospheric pressure cutoff valve 3 are installed such that the rotation directions are opposite to each other according to the pressure fluctuation direction. For example, when the vehicle enters the tunnel and a positive pressure pressure fluctuation 7 occurs outside the vehicle, a pressure difference is generated between the inside of the air conditioner body 100 and the outside of the vehicle, and the pressure inside the air conditioner body 100 is increased. Becomes lower than the pressure outside the vehicle. This atmospheric pressure difference acts to rotate the first atmospheric pressure cutoff valve 2 in the opening direction, but the second atmospheric pressure cutoff valve 3 is allowed to rotate in the closing direction or as a holding force in the closed state. Works. That is, when the positive pressure fluctuation 7 is received from the outside of the vehicle, the air pressure inside the air conditioner main body 100 is maintained by the second atmospheric pressure cutoff valve 3. At this time, the first atmospheric pressure cutoff valve 2 is lifted and opened, and the drain water 9 in the airtight holding box 1 is drained 10 from the drain port 5 to the outside of the vehicle as shown in FIG. Further, since the first atmospheric pressure shut-off valve 2 receives the pressure from the drain port 5 due to the pressure fluctuation that suddenly changes when the vehicle passes through the tunnel, the spray 22 is sprayed as shown in FIG. Occur. Since the first atmospheric pressure shut-off valve 2 is covered with the airtight holding box 1, the splash 22 is not scattered in all directions, and the splash 22 is attached to other devices and the electric wires in the air conditioner main body 100. There is nothing wrong.

また、空調機本体１００の外部で負圧圧力変動８が発生した場合は、空調機本体１００の内部と車両外部との間で気圧差が生じ、空調機本体１００の内部の圧力が車両外部の圧力よりも高くなる。この気圧差は、第１の気圧遮断弁２を閉方向に回動させるように、あるいは閉状態の保持力として作用する。つまり、車両外部から負圧圧力変動８を受けたときは、第１の気圧遮断弁２によって空調機本体１００内の気密が保持される。また、この時、第２の気圧遮断弁３は車両外部の圧力変動の影響を受けないので、ドレン水受部２１内のドレン水９が予め設定された水位となれば、ドレン水９によって開かれる。そして、ドレン水９が気密保持箱１内に導入される。   Further, when the negative pressure fluctuation 8 occurs outside the air conditioner main body 100, a pressure difference is generated between the inside of the air conditioner main body 100 and the outside of the vehicle, and the pressure inside the air conditioner main body 100 is outside the vehicle. Higher than pressure. This atmospheric pressure difference acts to rotate the first atmospheric pressure cutoff valve 2 in the closing direction or as a holding force in the closed state. That is, when the negative pressure fluctuation 8 is received from the outside of the vehicle, the first air pressure cutoff valve 2 maintains the airtightness in the air conditioner main body 100. At this time, since the second atmospheric pressure cutoff valve 3 is not affected by pressure fluctuation outside the vehicle, if the drain water 9 in the drain water receiving portion 21 reaches a preset water level, it is opened by the drain water 9. It is. Then, drain water 9 is introduced into the airtight holding box 1.

以上のように、本発明の実施形態に係る車両用空気調和装置によれば、車両内部と車両外部との間で急激な圧力変動が生じても、電気部品を使用することなく、第１の気圧遮断弁２と第２の気圧遮断弁３によって、気密を保持しつつ、つまり急激な圧力変動によって耳が痛くなる「耳ツン現象」を緩和しつつ、ドレン水９を排水１０することができる。   As described above, according to the air conditioning apparatus for a vehicle according to the embodiment of the present invention, even if a sudden pressure fluctuation occurs between the inside of the vehicle and the outside of the vehicle, the first component can be used without using an electrical component. The atmospheric pressure cutoff valve 2 and the second atmospheric pressure cutoff valve 3 can drain the drain water 9 while maintaining airtightness, that is, while alleviating the “ear pun phenomenon” in which ears become aching due to sudden pressure fluctuations. .

また、本発明の実施形態に係る車両用空気調和装置によれば、第１の気圧遮断弁２がフロート式のフラップ弁であるので、気密保持箱１内のドレン水９が予め設定された水位となれば、浮力によって開かれてドレン水９を排水１０することができる。   Further, according to the vehicle air conditioner according to the embodiment of the present invention, since the first atmospheric pressure cutoff valve 2 is a float type flap valve, the drain water 9 in the airtight holding box 1 is set to a preset water level. Then, the drain water 9 can be drained 10 by being opened by buoyancy.

なお、ここでは第１の気圧遮断弁２をフロート式のフラップ弁としているが、これに限定されるものでなく、例えばドレン水９の水位によって鉛直方向に浮き沈みする直動方式のフロート弁であってもよい。   Here, the first atmospheric pressure shut-off valve 2 is a float type flap valve, but is not limited to this. For example, the first atmospheric pressure cutoff valve 2 is a direct acting type float valve that floats and sinks vertically depending on the level of the drain water 9. May be.

１ 気密保持箱、２ 第１の気圧遮断弁、３ 第２の気圧遮断弁、４ 部品、５ 排水口、６ 連通孔、７ 正圧圧力変動、８ 負圧圧力変動、９ ドレン水、１０ 排水、２０ 蒸発器、２１ ドレン水受部、２２ 水しぶき、３１ 第１の水平方向の軸、３２ 第２の水平方向の軸、１００ 空調機本体。   DESCRIPTION OF SYMBOLS 1 Airtight holding box, 2 1st atmospheric pressure shut-off valve, 3rd 2nd atmospheric pressure shut-off valve, 4 parts, 5 drainage port, 6 communication hole, 7 positive pressure fluctuation, 8 negative pressure fluctuation, 9 drain water, 10 drainage , 20 Evaporator, 21 Drain water receiving part, 22 Spray, 31 First horizontal axis, 32 Second horizontal axis, 100 Air conditioner body.

Claims (3)

蒸発器を有する車両の空調機本体と、
前記蒸発器によって発生したドレン水の排水口を有し、前記空調機本体の底部に設けられたドレン水受部と、
前記ドレン水受部の前記排水口を覆うように設けられた気密保持箱と、
前記気密保持箱の側面に設けられ、前記空調機本体の内部空間と該気密保持箱の内部空間とを連通させる連通孔と、
前記排水口に設置され、車両外部からの正圧圧力を受けて開かれ、車両外部からの負圧圧力を受けて閉じられる第１の気圧遮断弁と、
前記連通孔に設置され、車両外部からの正圧圧力を受けて閉じられる第２の気圧遮断弁とを備え、
前記第２の気圧遮断弁は、前記ドレン水受部の前記ドレン水が予め設定された水位となれば、該ドレン水によって開かれて該ドレン水を前記気密保持箱内に導入させ、
前記第１の気圧遮断弁は、開かれた際に、前記気密保持箱内のドレン水を排水することを特徴とする車両用空気調和装置。 An air conditioner body of a vehicle having an evaporator;
A drain water receiving part provided at the bottom of the air conditioner body, having a drain outlet for drain water generated by the evaporator,
An airtight holding box provided to cover the drain outlet of the drain water receiving portion;
A communication hole that is provided on a side surface of the airtight holding box and communicates the internal space of the air conditioner main body with the internal space of the airtight holding box;
A first atmospheric pressure shut-off valve, which is installed at the drain, is opened by receiving a positive pressure from the outside of the vehicle, and is closed by receiving a negative pressure from the outside of the vehicle;
A second atmospheric pressure cutoff valve installed in the communication hole and closed by receiving a positive pressure from the outside of the vehicle;
The second atmospheric pressure shut-off valve is opened by the drain water when the drain water of the drain water receiving unit reaches a preset water level, and the drain water is introduced into the airtight holding box,
When the first atmospheric pressure shut-off valve is opened, drain water in the airtight holding box is drained. 前記第１の気圧遮断弁は、フロート式の弁であり、ドレン水が予め設定された水位となれば、浮力によって開かれて前記ドレン水を排水することを特徴とする請求項１記載の車両用空気調和装置。   2. The vehicle according to claim 1, wherein the first atmospheric pressure cutoff valve is a float type valve, and when the drain water reaches a preset water level, the first atmospheric pressure cutoff valve is opened by buoyancy to drain the drain water. Air conditioning equipment. 前記第１の気圧遮断弁は、前記ドレン水受部の上面における前記排水口の周縁部に軸を介して取り付けられ、上向きに揺動した時に開かれるように形成され、
前記第２の気圧遮断弁は、前記気密保持箱の内周面における前記連通孔の周縁部に軸を介して取り付けられ、前記気密保持箱の内部側に揺動した時に開かれるように形成されていることを特徴とする請求項１又は２記載の車両用空気調和装置。 The first atmospheric pressure shut-off valve is attached to the peripheral edge of the drain outlet on the upper surface of the drain water receiving portion via a shaft, and is formed to be opened when swinging upward,
The second atmospheric pressure cutoff valve is attached to a peripheral edge portion of the communication hole on the inner peripheral surface of the hermetic holding box via a shaft, and is formed so as to be opened when swinging to the inner side of the hermetic holding box. The air conditioner for a vehicle according to claim 1 or 2, wherein
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JPH03104771A (en) * 1989-09-20 1991-05-01 Hitachi Ltd Drainage device of car airconditioner
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