JPH0378939B2 - - Google Patents
Info
- Publication number
- JPH0378939B2 JPH0378939B2 JP59184672A JP18467284A JPH0378939B2 JP H0378939 B2 JPH0378939 B2 JP H0378939B2 JP 59184672 A JP59184672 A JP 59184672A JP 18467284 A JP18467284 A JP 18467284A JP H0378939 B2 JPH0378939 B2 JP H0378939B2
- Authority
- JP
- Japan
- Prior art keywords
- humidity
- detection element
- humidity detector
- temperature
- detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は自動車用湿度検出器に関し、特に窓ガ
ラスの曇りを防止するシステムに好適な自動車用
湿度検出器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a humidity detector for an automobile, and particularly to a humidity detector for an automobile suitable for a system for preventing fogging of window glass.
従来自動車では運転環境及び車室内環境等を良
好にするための各種装置を備えており、これらの
装置の或るものでは湿度検出器が利用されてい
る。例えば、特開昭56−63513号公報には窓ガラ
スの曇りを防止するシステムが記載されるが、こ
の窓ガラス曇り防止システムでは車室内の湿度状
態が重要な情報となるので、湿度検出器が利用さ
れている。
Conventionally, automobiles are equipped with various devices for improving the driving environment and the interior environment of the vehicle, and some of these devices utilize humidity detectors. For example, Japanese Patent Application Laid-Open No. 56-63513 describes a system for preventing fogging of window glass, but since this window glass fogging prevention system uses the humidity condition inside the vehicle as important information, a humidity detector is required. It's being used.
ところが、従来利用されている湿度検出器は、
雰囲気温度によつて応答速度が変化するという特
性を有し、特に低温になると検出応答の速度が遅
くなる。このため、前述の窓ガラス曇り防止シス
テムでは、曇りの始まりであることを正確に判断
するために車室内の絶対湿度を素早くに検出する
必要があるにもかかわらず、比較的に低温である
梅雨時には素早い湿度検出を行うことができず、
窓ガラスの曇り発生を有効に防止することができ
ないという不具合が起きる。
However, conventionally used humidity detectors are
It has a characteristic that the response speed changes depending on the ambient temperature, and the detection response speed becomes particularly slow at low temperatures. For this reason, the above-mentioned window glass anti-fog system needs to quickly detect the absolute humidity inside the vehicle in order to accurately determine the onset of fogging. Sometimes it is not possible to detect humidity quickly,
A problem occurs in that it is not possible to effectively prevent the occurrence of fogging on the window glass.
本発明の目的は、測定しようとする空間の雰囲
気温度が低い時でも加熱することにより湿度検出
の応答速度を早くすることができ、且つこれを実
現する加熱手段を簡易な構成で安価に設けること
ができ、更に雰囲気の温度が適切に高められる自
動車用湿度検出器を提供することにある。 An object of the present invention is to increase the response speed of humidity detection by heating even when the ambient temperature of the space to be measured is low, and to provide a heating means that achieves this at a simple configuration and at low cost. An object of the present invention is to provide a humidity detector for an automobile that can increase the temperature of the atmosphere appropriately.
本発明に係る自動車用湿度検出器は、被測定空
間の相対湿度を検出する湿度検出素子と、被測定
空間の温度を検出する温度検出素子と、湿度検出
素子の出力信号と温度検出素子の出力信号に基づ
き絶対湿度を求める演算手段とを有する自動車用
湿度検出器において、湿度検出素子が、自動車空
気調和装置の加熱源となるヒータコアに供給され
るエンジン冷却水で加熱されるように構成され
る。
The automotive humidity detector according to the present invention includes a humidity detection element that detects the relative humidity of a space to be measured, a temperature detection element that detects the temperature of the space to be measured, an output signal of the humidity detection element, and an output of the temperature detection element. A humidity detector for an automobile has a calculation means for determining absolute humidity based on a signal, and the humidity detection element is configured to be heated by engine cooling water supplied to a heater core serving as a heating source of an automobile air conditioner. .
また本発明に係る自動車用湿度検出器は、前記
の構成において、湿度検出素子がプリント基板上
に組み込まれ、プリント基板は、取付けベースを
介してエンジン冷却水が流れるパイプ上に固定さ
れるように構成される。 Further, in the automotive humidity detector according to the present invention, in the above configuration, the humidity detection element is incorporated on the printed circuit board, and the printed circuit board is fixed on the pipe through which engine cooling water flows through the mounting base. configured.
本発明に係る自動車湿度検出器は、前記の構成
において、湿度検出器を含むプリント基板が、通
気性のあるカバーで覆われるように構成される。 The automotive humidity detector according to the present invention has the above-mentioned configuration so that the printed circuit board including the humidity detector is covered with a breathable cover.
本発明による自動車用湿度検出器では、加熱手
段として、自動車用空気調和装置の加熱源となる
ヒータコアに供給されるエンジン冷却水が用いら
れる。具体的には、ヒータコアに接続されたエン
ジン冷却水用配送パイプを利用して湿度検出器を
加熱するように構成している。従つて、特別な発
熱装置を設ける必要がなく、構成が簡易で、安価
に作ることができる。また、湿度検出器の周囲空
間は通気性の良いカバーで覆われ、適切な加熱環
境が形成される。
In the automotive humidity detector according to the present invention, engine cooling water supplied to a heater core serving as a heating source of an automotive air conditioner is used as the heating means. Specifically, the humidity detector is configured to be heated using an engine cooling water delivery pipe connected to the heater core. Therefore, there is no need to provide a special heat generating device, and the structure is simple and can be manufactured at low cost. In addition, the space around the humidity detector is covered with a highly breathable cover to create an appropriate heating environment.
以下に、本発明の実施例を添付図面に基づいて
説明する。
Embodiments of the present invention will be described below with reference to the accompanying drawings.
車両１００は、車室１０１を空調するエアコン
ユニツト５０と、このエアコンユニツト５０に接
続され、エンジン１０４の冷却水１１０を循環さ
せる管１０５を有する。このエアコンユニツト５
０は内蔵するヒータコア５１や蒸発器５３、ブロ
ワー５４などで構成される。 The vehicle 100 includes an air conditioner unit 50 that air-conditions a vehicle interior 101, and a pipe 105 that is connected to the air conditioner unit 50 and that circulates cooling water 110 for the engine 104. This air conditioner unit 5
0 is composed of a built-in heater core 51, evaporator 53, blower 54, etc.
このヒータコア５１に接続される金属製のパイ
プ５２には湿度検出器１０が締め具８で固設され
る。 A humidity detector 10 is fixed to a metal pipe 52 connected to the heater core 51 with a fastener 8.
湿度検出器１０は車室１０１に配置され、高分
子感湿材を用いた湿度検出素子１と感温抵抗素子
２を実装したプリント基板３がベース５に固定さ
れ、更に金網状のカバー４で覆われている。検出
素子１，２からの電気的信号は線６とコネクタ７
で電子回路２０に接続している。 The humidity detector 10 is arranged in a vehicle compartment 101, and a printed circuit board 3 on which a humidity detection element 1 made of a polymeric moisture-sensitive material and a temperature-sensitive resistance element 2 are mounted is fixed to a base 5, and further covered with a wire mesh cover 4. covered. Electrical signals from detection elements 1 and 2 are connected to wire 6 and connector 7.
is connected to the electronic circuit 20.
この湿度検出素子１は、相対湿度に対応して電
気抵抗値が変化する特性を持つており、電気的に
相対湿度を表わせる。この相対湿度がステツプ変
化するときの検出応答速度は第４図及び第５図の
ように雰囲気の温度によつて異なり、高温側で早
い応答を現わすものである。 This humidity detection element 1 has a characteristic that its electrical resistance value changes in response to relative humidity, and can electrically represent relative humidity. The detection response speed when the relative humidity changes in steps varies depending on the temperature of the atmosphere, as shown in FIGS. 4 and 5, and the response is faster on the high temperature side.
本湿度検出器１０を用いる窓ガラス曇り防止シ
ステムはエアコンが温調しているとき、つまり冷
却水１１０が循環している状態で機能している。 The window glass fogging prevention system using the present humidity detector 10 functions when the air conditioner is controlling the temperature, that is, when the cooling water 110 is circulating.
これによつて湿度検出器１０は雰囲気温度を車
室内の平均温度よりも高い温度に維持されて作動
するので早い応答速度で相対湿度RH％を検出す
る、と同時に温度検出素子２で雰囲気温度Tsを
検出する。これらの検出量を電気信号で受けた電
子回路２０では、第６図に示す如く絶対湿度AH
を算出してから、車室内の露点温度Tdを求める。
更に温度検出器３０で図示しない窓ガラスの内面
温度Tgを検知することによつて、露点温度Td
窓ガラス内面温度Tgであることは窓ガラスが結
露して曇りを生ずることを判断できる。従つて、
温度Tg＞露点温度Tdの状態を維持するように除
湿、デフロストあるいは換気を起動して曇り初期
に曇り防止を行うことができる。このように、特
に湿度検出応答速度を早くして、窓ガラス曇り初
期を知り、必要最小に除湿、デフロストあるいは
換気を行うことができる。 As a result, the humidity detector 10 operates while maintaining the ambient temperature at a temperature higher than the average temperature in the vehicle interior, so it can detect the relative humidity RH% with a fast response speed, and at the same time, the temperature detecting element 2 detects the ambient temperature Ts. Detect. The electronic circuit 20 receives these detected amounts as electric signals, and as shown in FIG.
After calculating , find the dew point temperature Td inside the vehicle.
Furthermore, by detecting the inner surface temperature Tg of the window glass (not shown) with the temperature detector 30, the dew point temperature Td is determined.
If the window glass inner surface temperature is Tg, it can be determined that the window glass is fogged due to condensation. Therefore,
It is possible to prevent fogging at an early stage by starting dehumidification, defrosting, or ventilation so as to maintain the condition of temperature Tg > dew point temperature Td. In this way, by particularly increasing the humidity detection response speed, it is possible to know when the window glass is starting to fog up, and to perform dehumidification, defrosting, or ventilation to the minimum necessary level.
本実施例によれば、自から発熱体をもつことな
く、エンジン余熱利用によつて、安全で小形にな
る省エネ形にまとまり、かつ検知応答速度を早く
した車室内の絶対湿度を検知できる効果がある。 According to this embodiment, the absolute humidity inside the vehicle can be detected in a safe, compact, and energy-saving form with a faster detection response speed by utilizing the residual heat of the engine without having a heating element of its own. be.
以上の説明で明らかなように、本発明によれ
ば、自動車用湿度検出器において、湿度検出素子
の配置される雰囲気の温度を高める加熱手段を設
けるようにしたため、迅速に湿度検出を行うこと
ができ、特に低温の時期において早い湿度検出応
答速度を得ることができる。
As is clear from the above description, according to the present invention, since the humidity detector for an automobile is provided with a heating means that increases the temperature of the atmosphere in which the humidity detection element is placed, it is possible to quickly detect humidity. This makes it possible to obtain a fast humidity detection response speed, especially in low-temperature periods.
また前記加熱手段としてエンジン冷却水が流れ
るパイプを利用するようにしたため、構成が簡易
となり且つ全体が小形となり、エンジン余熱を利
用して低コストで作ることができる。 Further, since a pipe through which engine cooling water flows is used as the heating means, the structure is simple and the whole is compact, and it can be manufactured at low cost by utilizing engine residual heat.
更に、湿度検出器の周囲空間を通気性の良いカ
バーで覆うようにしたため、湿度検出器の周囲空
間を適切な温度に加熱することができる。 Furthermore, since the space around the humidity detector is covered with a cover with good ventilation, the space around the humidity detector can be heated to an appropriate temperature.
第１図は本発明係る湿度検出器を取付けた車両
の図、第２図は本発明に係る湿度検出器とエアコ
ンユニツトとの配置図、第３図は本発明に係る湿
度検出器内部断面と結線を示す図、第４図及び第
５図は高分子感湿材を用いる湿度検出器の検出応
答をステツプ湿度変化に対して示す図、第６図は
相対湿度と空気温度とから窓ガラス曇り防止制御
する説明図である。
〔符号の説明〕、１……湿度検出素子、２……
温度検出素子、３……プリント基板、５２……
管、１１０……エンジン冷却水。
FIG. 1 is a diagram of a vehicle equipped with a humidity detector according to the present invention, FIG. 2 is a layout diagram of a humidity detector according to the present invention and an air conditioner unit, and FIG. 3 is an internal cross-sectional view of the humidity detector according to the present invention. Figures 4 and 5 are diagrams showing the connections, Figures 4 and 5 are diagrams showing the detection response of a humidity detector using a polymeric moisture-sensitive material to step humidity changes, and Figure 6 is a diagram showing the detection response of a humidity detector using a polymeric moisture-sensitive material to step humidity changes. It is an explanatory view of prevention control. [Explanation of symbols], 1... Humidity detection element, 2...
Temperature detection element, 3... Printed circuit board, 52...
Pipe, 110...Engine cooling water.
Claims (1)
子と、前記被測定空間の温度を検出する温度検出
素子と、前記湿度検出素子の出力信号と前記温度
検出素子の出力信号に基づき絶対湿度を求める演
算手段とを有する自動車用湿度検出器において、
前記湿度検出素子は、自動車空気調和装置の加熱
源となるヒータコアに供給されるエンジン冷却水
で加熱されることを特徴とする自動車用湿度検出
器。 ２ 特許請求の範囲第１項に記載の自動車用湿度
検出器において、前記湿度検出素子はプリント基
板上に組み込まれ、前記プリント基板は、取付け
ベースを介して前記エンジン冷却水が流れるパイ
プ上に固定されることを特徴とする自動車用湿度
検出器。 ３ 特許請求の範囲第２項に記載の自動車湿度検
出器において、湿度検出器を含む前記プリント基
板は、通気性のあるカバーで覆われていることを
特徴とする自動車用湿度検出器。[Claims] 1. A humidity detection element that detects the relative humidity of a space to be measured, a temperature detection element that detects the temperature of the space to be measured, an output signal of the humidity detection element, and an output signal of the temperature detection element. In a humidity detector for an automobile, the humidity detector has a calculation means for determining absolute humidity based on the
The humidity detector for an automobile is characterized in that the humidity detection element is heated by engine cooling water supplied to a heater core serving as a heating source of an automobile air conditioner. 2. In the automotive humidity detector according to claim 1, the humidity detection element is incorporated on a printed circuit board, and the printed circuit board is fixed on a pipe through which the engine cooling water flows through a mounting base. An automotive humidity detector characterized by: 3. The automotive humidity detector according to claim 2, wherein the printed circuit board containing the humidity detector is covered with a breathable cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59184672A JPS6162852A (en) | 1984-09-05 | 1984-09-05 | Humidity detector for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59184672A JPS6162852A (en) | 1984-09-05 | 1984-09-05 | Humidity detector for automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6162852A JPS6162852A (en) | 1986-03-31 |
| JPH0378939B2 true JPH0378939B2 (en) | 1991-12-17 |
Family
ID=16157336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59184672A Granted JPS6162852A (en) | 1984-09-05 | 1984-09-05 | Humidity detector for automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6162852A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6798336B2 (en) * | 2017-02-08 | 2020-12-09 | 株式会社デンソー | Absolute humidity sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5663513A (en) * | 1979-10-31 | 1981-05-30 | Diesel Kiki Co Ltd | Method and apparatus for preventing clouding inside car glass and control moisture for car-air conditioner |
-
1984
- 1984-09-05 JP JP59184672A patent/JPS6162852A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6162852A (en) | 1986-03-31 |
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