JP2004117020A - Infrared detection device and air conditioner using it - Google Patents

Infrared detection device and air conditioner using it Download PDF

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JP2004117020A
JP2004117020A JP2002276953A JP2002276953A JP2004117020A JP 2004117020 A JP2004117020 A JP 2004117020A JP 2002276953 A JP2002276953 A JP 2002276953A JP 2002276953 A JP2002276953 A JP 2002276953A JP 2004117020 A JP2004117020 A JP 2004117020A
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infrared
temperature
cover
sensor
receiving window
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JP3843922B2 (en
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Akira Hidaka
日高　彰
Takashi Matsumoto
松本　崇
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an infrared detection device capable of detecting an accurate temperature through an infrared ray from an infrared detection region. <P>SOLUTION: This device is equipped with a sensor cover comprising an infrared-transparent material for transmitting the infrared ray radiated from the infrared detection region such as the floor or the wall in a room, a light receiving window provided oppositely under the sensor cover, for transmitting the infrared ray, an infrared detection element provided oppositely under the light receiving window, for detecting the infrared quantity, a cylindrical metal wall provided between the infrared detection element and the light receiving window, for transmitting the temperature of the light receiving window to a cold junction reference plane of the infrared detection element, and a cylindrical heat sink provided so as to cover the periphery of the metal wall and comprising a metal material for transmitting the temperature of the sensor cover to the cold junction reference plane. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、室内の床や壁の温度等を赤外線を介して検出する赤外線検出装置及びそれを用いた空気調和機に関するものである。
【０００２】
【従来の技術】
従来の空気調和機等に用いる赤外線検出装置として、赤外線の放射エネルギーを受光するサーモバイル素子（赤外線検出素子）周囲の冷接点部上に、金属やセラミック材等の材質からなる薄肉筒状の支持台（金属壁）を設け、その上に赤外線干渉フィルタの窓材（受光窓）を設けて、薄肉筒状の支持台（金属壁）により窓材（受光窓）とサーモバイル素子（赤外線検出素子）との温度差を無くして、窓材（受光窓）からの赤外線放射エネルギーの影響を少なくすると共に、この窓材を覆うように赤外透過率の高いシーリング材（センサカバー）を備えたキャップを被せ、窓材周囲の空気の流れによる温度の影響も少なくなるようにした構成のものがある（例えば特許文献１参照）
【０００３】
特開昭６３−１０９３３６号公報（第２頁、第１図）
【０００４】
【発明が解決しようとする課題】
従来の赤外線検出装置は、窓材とサーモバイル素子との温度差を少なくし、窓材から放射される赤外線放射エネルギーの影響は防止しているものの、この窓材を覆う赤外透過率の高いシーリング材（センサカバー）から放射される赤外線放射エネルギーの影響を考慮していないために、正確な赤外線放射エネルギーを計測していないという問題があった。
【０００５】
この発明は上記のような問題点を解消するためになされたもので、室内の床や壁等から放射される赤外線放射エネルギーを精度良く検出し、該赤外線放射エネルギーから精度良く温度を検出する赤外線検出装置及びそれを用いた空気調和機を得ることを目的とする。
【０００６】
【課題を解決するための手段】
この発明においては、室内の床や壁等の被赤外線検出領域から放射される赤外線を透過する赤外線透過材からなるセンサカバーと、このセンサカバーの下方に対向して設けられ、前記赤外線を透過する受光窓と、この受光窓の下方に対向して設けられ、前記赤外線量を検出する赤外線検出素子と、この赤外線検出素子の冷接点基準面と前記受光窓との間を接続するように設けられ、前記受光窓の温度を前記冷接点基準面に伝達する筒状の金属壁と、この金属壁の外周面を囲うように設けられ、前記センサカバーの温度を前記冷接点基準面に伝達する金属材料からなる筒状のヒートシンクと、を備えたものである。
【０００７】
また、前記筒状のヒートシンクが、その筒低部に蓋部を有し、該蓋部が前記冷接点基準面に当接するものである。
【０００８】
また、前記センサカバーの温度を検出するカバー温度センサと、前記金属壁の温度を検出する金属壁温度センサと、を具備し、前記カバー温度センサと前記金属壁温度センサとの温度差に基づいて前記赤外線量を補正して出力するものである。
【０００９】
また、前記赤外線量を補正する時、前記センサカバーの比熱容量を考慮して補正するものである。
【００１０】
また、室内の床や壁等の被赤外線検出領域から放射される赤外線を透過する受光窓と、この受光窓の下方に対向して設けられ、前記赤外線量を検出する赤外線検出素子と、この赤外線検出素子の冷接点基準面と前記受光窓との間を接続するように設けられ、前記受光窓の温度を前記冷接点基準面に伝達する筒状の金属壁と、を備えた赤外線検出装置において、
前記受光窓の上方の対向する位置に前記赤外線を透過するセンサカバーを有し、前記金属壁及び前記受光窓を覆うキャップと、このキャップのセンサカバーの温度を検出するカバー温度センサと、前記金属壁の温度を検出するカバー温度センサと、を具備し、前記カバー温度センサと前記金属壁温度センサとの温度差に基づいて前記赤外線量を補正して出力するものである。
【００１１】
また、前記赤外線量を補正する時、前記センサカバーの比熱容量を考慮して補正するものである。
【００１２】
また、前記請求項１から６までのいずれかに記載された赤外線検出装置が、室内を空調する室内ユニットに取り付けられ、前記室内の床や壁等から放射される赤外線を介して温度を検出して制御するものである。
【００１３】
また、前記赤外線検出装置のカバー温度センサが、前記室内ユニットの室内温度を検出する室内温度センサとして活用されたものである。
【００１４】
【発明の実施の形態】
実施の形態１．
以下、この発明の実施の形態１について図１を用いながら説明する。
まず、図１は室内の床、壁等の温度を赤外線を介して非接触で計測する赤外線検出装置の概略断面図であり、この図の１は床や壁等から放射される赤外線量に応じて放射エネルギー信号を出力する赤外線検出素子、２はこの赤外線検出素子１の上方に対向して設けられ、床、壁等からの赤外線エネルギーを受光する赤外線透過材で構成された受光窓、３はこの受光窓２を支持して赤外線検出素子１の上方を囲うように設けられ、受光窓２と赤外線検出素子１の冷接点基準面との互いの熱を伝達する金属壁、４はこの金属壁３の内面温度を測定する金属壁温度センサ、４ａはこの金属壁温度センサ４の温度信号を外部に伝えるための温度信号ピン、１ａは赤外線検出素子１の出力信号を外部に伝えるための放射信号ピンである。
【００１５】
また、７は赤外線検出装置６内に取り付けられ、赤外線検出素子１からの放射エネルギー信号及び金属壁温度センサ４の温度信号を増幅する増幅基板、８は受光窓２の上方に対向して設けられ、冷温風が受光窓２に当たるのを防ぎなら赤外線を透過する赤外線透過材からなるセンサカバー、９はこのセンサカバー８と赤外線検出素子１の冷接点基準面とに当接して配置され、互いの熱を伝えるアルミ等の伝熱性に優れた金属材料料からなる筒状のヒートシンク、１０はセンサカバー８の温度を測定するカバー温度センサ、１１はこのカバー温度センサ１０及び金属壁温度センサ４の温度信号に基づいて赤外線検出素子１からの放射エネルギー信号を修正し、この修正結果に基づいて空気調和機の動作を制御する制御装置である。
【００１６】
次に、このように構成された動作について図１を用いながら説明する。
まず、被赤外線検出領域からの赤外線１２Ａが赤外線検出素子１に入光し、赤外線検出素子１が赤外線１２Ａによって温められると、この素子温度と金属壁３の温度（冷接点基準温度）との温度差に応じて放射信号が増幅基板７に送信されるので、制御手段は当該放射信号から室内被検出領域の温度を検出することになる。
【００１７】
また、この時、センサカバー８の表面と冷接点基準温度面とに接触した伝熱性の良い筒状のヒートシンク９は、センサカバー８の温度と金属壁の温度、即ち、冷接点基準温度とがほぼ同じ温度となるように作用するので、冷温風等がセンサカバー８に当たって温度が変化しても、この温度変化を筒状のヒートシンク９は冷接点基準温度へ伝達し、ほぼ同じ温度となるようにするので、センサカバー８の温度変化による赤外線の影響を受けずに、室内被検出領域からの赤外線量１２Ａを正確に計測し、正確な温度を検出することになる。
【００１８】
また、この時、センサカバー８の温度を検出するカバー温度センサ１０の検出結果と、冷接点基準温度面に接続された金属壁３の温度を検出する金属壁温度センサ４の検出結果とを制御手段に送信し、この送信結果から制御手段がセンサカバー８の温度と金属壁３の温度（冷接点基準温度）との温度差を演算し、この温度差に基づいて前述の計測温度を補正し、この補正結果から室内被検出領域の温度を求めるようにすると、例え、センサカバー８と金属壁３との間に温度差が生じても、図２に示すように、センサカバー８の温度による赤外線の影響を少なくして被赤外線検出領域からの赤外線を検出できるため、正確な温度を検出できるようになる。
【００１９】
即ち、例えば、Ｔｂ＞Ｔａの時は、センサカバー８の温度が金属壁３の温度（冷接点基準温度）よりも高いので、その高い温度分だけ、赤外線量が多くなるため、その分だけ引き、また、Ｔｂ＜Ｔａの時は、センサカバー８の温度が低いので、その低い温度分だけ、赤外線量が減少するくため、その分だけ加算して、センサカバー温度による赤外線の影響を少なくしてやる。
言い換えれば、計測温度をＴ、補正後の室内被検出領域温度をＴｈ、カバー温度センサ１０の検出温度をＴｂ、金属壁温度センサ４の検出温度をＴａとした時、センサカバー８と金属壁３との温度差（Ｔａ−Ｔｂ）分だけ、補正してやる。
【００２０】
また、この時更に、センサカバー８の授受熱量に対する温度変化の割合、言い換えれば、センサカバー８の比熱容量分を考慮して補正してやれば、更に正確な温度を検出できるため、前述の（Ｔａ−Ｔｂ）にセンサカバー８の比熱容量定数αを乗算し、この乗算した値（Ｔａ−Ｔｂ）×α＝ΔＴをセンサカバーの温度補正値として、補正後の室内被検出領域の温度（Ｔｈ）を下式（１）より求めて検出するようにすると、更に正確な温度が検出できる。Ｔｈ＝Ｔ＋（Ｔａ１−Ｔａ２）×α・・・・（１）
【００２１】
なお、このように赤外線量を補正して検出する時には、前述した金属材料からなる筒状のヒートシンクの換わりに、例えば、伝熱性の余り良くないプラスチク材や赤外線透過材を使用して、冷温風等が直接当たらないように、受光窓２の対向する位置にセンサカバー８を有するキャップ構造にしても良い。
【００２２】
また、以上の説明では、金属壁３内の赤外線検出素子１に赤外線を導く受光窓２の温度による赤外線の影響を考慮しなかったのは、受光窓２がセンサカバー８の内側に設けられているため、冷温風等が直接当たる構造ではないこと、かつ、金属壁３の側面による熱伝導だけ無く、アルミ等の伝熱性に優れた金属材料からなる筒状のヒートシンクに囲まれ、このヒートシンクによって受光窓２の周囲空気温度を冷接点基準温度に近づけるような構造になっているために、受光窓２の温度による影響はほとんど無いと考えられるからである。
【００２３】
実施の形態２．
この実施の形態２においては、センサカバー８の温度と金属壁３の温度（冷接点基準温度）とをほぼ同じ温度とするために、図３に示すように、センサカバー８及び金属壁３の側面に接触する筒状のヒートシンク９の低部に蓋部９ａを設け、この蓋部９ａが増幅基板７と赤外線検出素子１の冷接点基準温度面との間に位置するように構成されたものである。
また、この蓋部９ａには赤外線検出装置６の放射信号ピン１ａや温度信号ピン４ａと接触せずに、これらのピンを貫通させる穴を設けている。
【００２４】
なお、このような構成にすると、センサカバー８の温度とが冷接点基準温度面の温度に近づくため、センサカバー８の温度による赤外線の影響を少なくして検出できるので、更に正確な温度を検出できるようになる。
【００２５】
実施の形態３．
この実施の形態３においては、実施の形態１又は２のいずれかの赤外線検出装置を、室内を空調する空気調和機の室内ユニットに用いたものである。
なお、このようにすると、室内の床や壁等から放射される赤外線を介して温度を正確に検出して空調する空気調和機が得られる。
【００２６】
また、この時、センサカバー８の温度を検出するためにカバー温度センサ１０を、空気調和機の室温を計測する室温センサとして活用すると、少ない部品で、室温と床や壁温とを一つセンサで検出できるようになるため、経済的な空気調和機が得られる。
【００２７】
【発明の効果】
以上説明したように、この発明においては、室内の床や壁等の被赤外線検出領域から放射される赤外線を透過する赤外線透過材からなるセンサカバーと、このセンサカバーの下方に対向して設けられ、前記赤外線を透過する受光窓と、この受光窓の下方に対向して設けられ、前記赤外線量を検出する赤外線検出素子と、この赤外線検出素子の冷接点基準面と前記受光窓との間を接続するように設けられ、前記受光窓の温度を前記冷接点基準面に伝達する筒状の金属壁と、この金属壁の外周面を囲うように設けられ、前記センサカバーの温度を前記冷接点基準面に伝達する金属材料からなる筒状のヒートシンクと、を備えたので、センサカバーの温度による赤外線の影響を少なくして被赤外線検出領域からの赤外線を検出できるため、正確な温度を検出する赤外線検出装置が得られる。
【００２８】
また、前記筒状のヒートシンクが、その筒低部に蓋部を有し、該蓋部が前記冷接点基準面に当接するので、更にセンサカバーの温度による赤外線の影響を少なくできるため、更に正確な温度を検出できる赤外線検出装置が得られる。
【００２９】
また、前記センサカバーの温度を検出するカバー温度センサと、前記金属壁の温度を検出する金属壁温度センサと、を具備し、前記カバー温度センサと前記金属壁温度センサとの温度差に基づいて前記赤外線量を補正して出力するので、カバー温度センサと赤外線検出素子の冷接点基準温度との間に温度差が生じても、被赤外線検出領域からの赤外線を正確に検出できるため、正確な温度を検出できる赤外線検出装置が得られる
【００３０】
また、前記赤外線量を補正する時、前記センサカバーの比熱容量を考慮して補正するので、さらに正確な温度を検出できる赤外線検出装置が得られる。
【００３１】
また、室内の床や壁等の被赤外線検出領域から放射される赤外線を透過する受光窓と、この受光窓の下方に対向して設けられ、前記赤外線量を検出する赤外線検出素子と、この赤外線検出素子の冷接点基準面と前記受光窓との間を接続するように設けられ、前記受光窓の温度を前記冷接点基準面に伝達する筒状の金属壁と、を備えた赤外線検出装置において、
前記受光窓の上方の対向する位置に前記赤外線を透過するセンサカバーを有し、前記金属壁及び前記受光窓を覆うキャップと、このキャップのセンサカバーの温度を検出するカバー温度センサと、前記金属壁の温度を検出するカバー温度センサと、を具備し、前記カバー温度センサと前記金属壁温度センサとの温度差に基づいて前記赤外線量を補正して出力するので、カバー温度センサと赤外線検出素子の冷接点基準温度との間に温度差が生じても、被赤外線検出領域からの赤外線を正確に検出できるため、正確な温度を検出できる赤外線検出装置が得られる。
【００３２】
また、前記請求項１から６までのいずれかに記載された赤外線検出装置が、室内を空調する室内ユニットに取り付けられ、前記室内の床や壁等から放射される赤外線を介して温度を検出して制御するので、室内の床や壁等の温度を正確に検出して空調する空気調和機が得られる。
【００３３】
また、前記赤外線検出装置のカバー温度センサが、前記室内ユニットの室内温度を検出する室内温度センサとして活用されたので、一つのセンサで床温と室温と検出できる経済的な空気調和機が得られる。
【図面の簡単な説明】
【図１】この発明の実施の形態１による赤外線検出装置の概略断面図である。
【図２】この発明における冷接点基準温度とセンサカバーの温度との温度差に応じて補正した時と補正しない時との関係を示した図である。
【図３】この発明の実施の形態２による赤外線検出装置の概略断面図である。
【図４】この発明の赤外線検出装置を用いた空気調和機の概略構成図である。
【符号の説明】
１　赤外線検出素子、　１ａ　放射信号ピン２　受光窓、　３　金属壁、　４金属壁温度センサ、　４ａ　温度信号ピン、　６　赤外線検出装置、　７　増基板、　８　センサカバー、　９　ヒートシンク、　９ａ蓋部、　１０　カバー温度センサ、　１１　制御装置、　１２Ａ　赤外線、　１３　空気調和機。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an infrared detection device that detects the temperature of a floor or wall in a room via infrared light, and an air conditioner using the same.
[0002]
[Prior art]
As an infrared detector used for conventional air conditioners, a thin cylindrical support made of metal or ceramic material is placed on the cold junction around a thermomobile element (infrared detector) that receives infrared radiation energy. A table (metal wall) is provided, and a window material (light receiving window) of the infrared interference filter is provided thereon. The window material (light receiving window) and the sir mobile element (infrared ray detecting element) ) To reduce the effect of infrared radiation energy from the window material (light-receiving window), and to provide a sealing material (sensor cover) with a high infrared transmittance to cover this window material. There is a configuration in which the influence of the temperature due to the flow of air around the window material is reduced (for example, see Patent Document 1).
[0003]
JP-A-63-109336 (page 2, FIG. 1)
[0004]
[Problems to be solved by the invention]
The conventional infrared detection device reduces the temperature difference between the window material and the thermomobile element, and prevents the effect of infrared radiation energy radiated from the window material, but has a high infrared transmittance covering the window material. Since the influence of infrared radiation radiated from the sealing material (sensor cover) is not taken into account, there is a problem that accurate infrared radiation energy is not measured.
[0005]
The present invention has been made in order to solve the above-described problems, and it is an infrared detection device that detects infrared radiation energy radiated from a floor or wall in a room with high accuracy and detects temperature accurately from the infrared radiation energy. An object is to obtain an apparatus and an air conditioner using the same.
[0006]
[Means for Solving the Problems]
According to the present invention, a sensor cover made of an infrared transmitting material that transmits infrared rays radiated from an infrared detection area such as a floor or a wall in a room, and a light receiving member that is provided below and facing the sensor cover and transmits the infrared light A window, provided below and facing the light receiving window, an infrared detecting element for detecting the amount of infrared light, and provided to connect between the cold junction reference surface of the infrared detecting element and the light receiving window, A cylindrical metal wall for transmitting the temperature of the light receiving window to the cold junction reference surface; and a metal material provided to surround an outer peripheral surface of the metal wall and transmitting the temperature of the sensor cover to the cold junction reference surface. And a cylindrical heat sink made of
[0007]
Further, the cylindrical heat sink has a lid at a lower part of the cylinder, and the lid contacts the cold junction reference surface.
[0008]
A cover temperature sensor for detecting a temperature of the sensor cover; and a metal wall temperature sensor for detecting a temperature of the metal wall, based on a temperature difference between the cover temperature sensor and the metal wall temperature sensor. The infrared ray amount is corrected and output.
[0009]
Further, when the infrared ray amount is corrected, the infrared ray amount is corrected in consideration of the specific heat capacity of the sensor cover.
[0010]
A light-receiving window that transmits infrared light radiated from an infrared-ray detection area such as a floor or a wall in a room; an infrared detecting element that is provided opposite to and below the light-receiving window and detects the amount of infrared light; A cylindrical metal wall that is provided to connect between the cold junction reference surface of the element and the light receiving window, and that transmits the temperature of the light receiving window to the cold junction reference surface,
A cap for covering the metal wall and the light receiving window, having a sensor cover for transmitting the infrared light at a position facing the light receiving window, a cover temperature sensor for detecting a temperature of a sensor cover of the cap, A cover temperature sensor for detecting a temperature of a wall, wherein the infrared ray amount is corrected and output based on a temperature difference between the cover temperature sensor and the metal wall temperature sensor.
[0011]
Further, when the infrared ray amount is corrected, the infrared ray amount is corrected in consideration of the specific heat capacity of the sensor cover.
[0012]
Further, the infrared detection device according to any one of claims 1 to 6 is attached to an indoor unit that air-conditions a room, and detects a temperature via infrared rays radiated from a floor or a wall in the room. Control.
[0013]
Further, the cover temperature sensor of the infrared detection device is used as an indoor temperature sensor for detecting the indoor temperature of the indoor unit.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIG.
First, FIG. 1 is a schematic cross-sectional view of an infrared detector that measures the temperature of a floor, a wall, etc. in a room through infrared rays in a non-contact manner. FIG. An infrared detecting element 2 for outputting a radiant energy signal is provided above the infrared detecting element 1 so as to face the same, and a light receiving window 3 made of an infrared transmitting material for receiving infrared energy from a floor, a wall, or the like is provided. A metal wall, which is provided to support the light receiving window 2 and surrounds the upper part of the infrared detecting element 1, and transfers heat between the light receiving window 2 and the cold junction reference surface of the infrared detecting element 1, 4a is a temperature signal pin for transmitting the temperature signal of the metal wall temperature sensor 4 to the outside, and 1a is a radiation signal pin for transmitting the output signal of the infrared detecting element 1 to the outside. It is.
[0015]
Reference numeral 7 denotes an amplifying board which is mounted in the infrared detecting device 6 and amplifies a radiant energy signal from the infrared detecting element 1 and a temperature signal of the metal wall temperature sensor 4. A sensor cover 9 made of an infrared transmitting material that transmits infrared rays so as to prevent cold and hot air from hitting the light receiving window 2. The sensor cover 9 is disposed in contact with the sensor cover 8 and the cold junction reference surface of the infrared detecting element 1, and A cylindrical heat sink made of a metal material having excellent heat conductivity such as aluminum which transmits heat, 10 is a cover temperature sensor for measuring the temperature of the sensor cover 8, and 11 is the temperature of the cover temperature sensor 10 and the metal wall temperature sensor 4. The control device corrects a radiant energy signal from the infrared detection element 1 based on the signal, and controls the operation of the air conditioner based on the correction result.
[0016]
Next, the operation thus configured will be described with reference to FIG.
First, when the infrared ray 12A from the infrared ray detection area enters the infrared ray detecting element 1 and the infrared ray detecting element 1 is heated by the infrared ray 12A, the temperature of this element temperature and the temperature of the metal wall 3 (cold junction reference temperature) Since the radiation signal is transmitted to the amplification board 7 according to the difference, the control means detects the temperature of the indoor detection target region from the radiation signal.
[0017]
At this time, the cylindrical heat sink 9 having good heat conductivity in contact with the surface of the sensor cover 8 and the cold junction reference temperature surface has a temperature of the sensor cover 8 and a temperature of the metal wall, that is, the cold junction reference temperature. Since the temperature is substantially the same, the temperature change is transmitted to the cold-junction reference temperature by the cylindrical heat sink 9 even when the temperature changes due to the hot or cold air hitting the sensor cover 8 so that the temperature becomes almost the same. Therefore, the amount of infrared rays 12A from the detected area in the room is accurately measured without being affected by the infrared rays due to the temperature change of the sensor cover 8, and the accurate temperature is detected.
[0018]
At this time, the detection result of the cover temperature sensor 10 for detecting the temperature of the sensor cover 8 and the detection result of the metal wall temperature sensor 4 for detecting the temperature of the metal wall 3 connected to the cold junction reference temperature surface are controlled. Control means calculates a temperature difference between the temperature of the sensor cover 8 and the temperature of the metal wall 3 (cold junction reference temperature) from the transmission result, and corrects the above-mentioned measured temperature based on the temperature difference. When the temperature of the detected area in the room is obtained from the correction result, even if a temperature difference occurs between the sensor cover 8 and the metal wall 3, as shown in FIG. Since the influence of infrared rays can be reduced and infrared rays from the infrared ray detection area can be detected, accurate temperature can be detected.
[0019]
That is, for example, when Tb> Ta, the temperature of the sensor cover 8 is higher than the temperature of the metal wall 3 (cold junction reference temperature). When Tb <Ta, since the temperature of the sensor cover 8 is low, the amount of infrared rays is not reduced by the lower temperature. Therefore, the amount of infrared rays is reduced by that amount to reduce the influence of infrared rays due to the sensor cover temperature. .
In other words, when the measured temperature is T, the corrected room detected area temperature is Th, the detected temperature of the cover temperature sensor 10 is Tb, and the detected temperature of the metal wall temperature sensor 4 is Ta, the sensor cover 8 and the metal wall 3 are detected. Is corrected by the temperature difference (Ta−Tb).
[0020]
Further, at this time, if the correction is made in consideration of the ratio of the temperature change to the amount of heat exchanged by the sensor cover 8, in other words, the specific heat capacity of the sensor cover 8, a more accurate temperature can be detected. Tb) is multiplied by the specific heat capacity constant α of the sensor cover 8, and the multiplied value (Ta−Tb) × α = ΔT is used as the temperature correction value of the sensor cover, and the corrected temperature (Th) of the detected area in the room is obtained. If the temperature is determined by the following equation (1), a more accurate temperature can be detected. Th = T + (Ta1−Ta2) × α (1)
[0021]
When detecting by correcting the amount of infrared light in this way, instead of the above-described cylindrical heat sink made of a metal material, for example, using a plastic material or an infrared transmitting material having a poor heat transfer property, and using a cold and hot air For example, a cap structure having a sensor cover 8 at a position facing the light receiving window 2 so that the light receiving window 2 does not directly hit may be used.
[0022]
In the above description, the influence of infrared rays due to the temperature of the light receiving window 2 for guiding infrared light to the infrared detecting element 1 in the metal wall 3 is not considered because the light receiving window 2 is provided inside the sensor cover 8. Therefore, the structure is not directly exposed to cold or hot air, and is surrounded by a cylindrical heat sink made of a metal material having excellent heat conductivity such as aluminum without heat conduction by the side surfaces of the metal wall 3. This is because the structure is such that the ambient air temperature of the light receiving window 2 approaches the cold junction reference temperature, so that it is considered that the temperature of the light receiving window 2 hardly affects the temperature.
[0023]
Embodiment 2 FIG.
In the second embodiment, in order to make the temperature of the sensor cover 8 and the temperature of the metal wall 3 (cold junction reference temperature) substantially the same, as shown in FIG. A cover 9a is provided at a lower portion of a cylindrical heat sink 9 which is in contact with a side surface, and the cover 9a is located between the amplification substrate 7 and a cold junction reference temperature surface of the infrared detecting element 1. It is.
The lid 9a is provided with a hole through which the radiation signal pin 1a and the temperature signal pin 4a of the infrared ray detection device 6 do not come into contact with, but penetrate these pins.
[0024]
In this configuration, since the temperature of the sensor cover 8 approaches the temperature of the cold junction reference temperature surface, the temperature of the sensor cover 8 can be detected with less influence of infrared rays. become able to.
[0025]
Embodiment 3 FIG.
In the third embodiment, the infrared detection device according to any one of the first and second embodiments is used for an indoor unit of an air conditioner that air-conditions a room.
In this case, an air conditioner that accurately detects the temperature via infrared rays radiated from the floor, walls, and the like in the room and performs air conditioning is obtained.
[0026]
At this time, if the cover temperature sensor 10 is used as a room temperature sensor for measuring the room temperature of the air conditioner in order to detect the temperature of the sensor cover 8, the room temperature and the floor and wall temperatures can be reduced by one sensor with few components. Since it can be detected, an economical air conditioner can be obtained.
[0027]
【The invention's effect】
As described above, in the present invention, a sensor cover made of an infrared transmitting material that transmits infrared rays radiated from an infrared detection area such as a floor or wall in a room, and provided below and facing the sensor cover, A light receiving window that transmits the infrared light, an infrared light detecting element that is provided opposite to the light receiving window and detects the amount of infrared light, and connects a cold junction reference surface of the infrared light detecting element to the light receiving window; And a cylindrical metal wall that transmits the temperature of the light receiving window to the cold junction reference surface, and is provided so as to surround the outer peripheral surface of the metal wall, and the temperature of the sensor cover is set to the cold junction reference surface. A cylindrical heat sink made of a metal material that transmits to the surface, so that the temperature of the sensor cover can reduce the effect of infrared rays and detect infrared rays from the infrared detection area. Infrared detection device is obtained to detect the.
[0028]
Further, since the cylindrical heat sink has a lid at a lower portion of the cylinder, and the lid abuts on the cold junction reference surface, the influence of infrared rays due to the temperature of the sensor cover can be further reduced. Thus, an infrared detector capable of detecting various temperatures can be obtained.
[0029]
A cover temperature sensor for detecting a temperature of the sensor cover; and a metal wall temperature sensor for detecting a temperature of the metal wall, based on a temperature difference between the cover temperature sensor and the metal wall temperature sensor. Since the infrared ray amount is corrected and output, even if a temperature difference occurs between the cover temperature sensor and the cold junction reference temperature of the infrared ray detecting element, infrared rays from the infrared ray detection area can be accurately detected, so that accurate An infrared detector capable of detecting temperature is obtained.
In addition, when the infrared ray amount is corrected, the correction is performed in consideration of the specific heat capacity of the sensor cover, so that an infrared detecting device capable of detecting a more accurate temperature can be obtained.
[0031]
A light-receiving window that transmits infrared light radiated from an infrared-ray detection area such as a floor or a wall in a room; an infrared detecting element that is provided opposite to and below the light-receiving window and detects the amount of infrared light; A cylindrical metal wall that is provided to connect between the cold junction reference surface of the element and the light receiving window, and that transmits the temperature of the light receiving window to the cold junction reference surface,
A cap for covering the metal wall and the light receiving window, having a sensor cover for transmitting the infrared light at a position facing the light receiving window, a cover temperature sensor for detecting a temperature of a sensor cover of the cap, A cover temperature sensor for detecting the temperature of the wall; and correcting and outputting the amount of infrared rays based on a temperature difference between the cover temperature sensor and the metal wall temperature sensor. Even if there is a temperature difference between the cold junction reference temperature and the cold junction reference temperature, an infrared ray from the infrared ray detection area can be accurately detected, so that an infrared ray detecting device capable of accurately detecting the temperature can be obtained.
[0032]
Further, the infrared detection device according to any one of claims 1 to 6 is attached to an indoor unit that air-conditions a room, and detects a temperature via infrared rays radiated from a floor or a wall in the room. Since the control is performed, an air conditioner that accurately detects the temperature of the floor or wall in the room and performs air conditioning can be obtained.
[0033]
Further, since the cover temperature sensor of the infrared detection device is used as an indoor temperature sensor for detecting the indoor temperature of the indoor unit, an economical air conditioner that can detect the floor temperature and the room temperature with one sensor can be obtained. .
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of an infrared detecting device according to Embodiment 1 of the present invention.
FIG. 2 is a diagram showing a relationship between a case where correction is performed according to a temperature difference between a cold junction reference temperature and a temperature of a sensor cover and a case where correction is not performed according to the present invention;
FIG. 3 is a schematic sectional view of an infrared detection device according to a second embodiment of the present invention.
FIG. 4 is a schematic configuration diagram of an air conditioner using the infrared detection device of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 infrared detecting element, 1 a radiation signal pin 2 light receiving window, 3 metal wall, 4 metal wall temperature sensor, 4 a temperature signal pin, 6 infrared detecting device, 7 additional board, 8 sensor cover, 9 heat sink, 9 a lid, 10 cover Temperature sensor, 11 control device, 12A infrared ray, 13 air conditioner.

Claims (8)

室内の床や壁等の被赤外線検出領域から放射される赤外線を透過する赤外線透過材からなるセンサカバーと、このセンサカバーの下方に対向して設けられ、前記赤外線を透過する受光窓と、この受光窓の下方に対向して設けられ、前記赤外線量を検出する赤外線検出素子と、この赤外線検出素子の冷接点基準面と前記受光窓との間を接続するように設けられ、前記受光窓の温度を前記冷接点基準面に伝達する筒状の金属壁と、この金属壁の外周面を囲うように設けられ、前記センサカバーの温度を前記冷接点基準面に伝達する金属材料からなる筒状のヒートシンクと、を備えたことを特徴とする赤外線検出装置。A sensor cover made of an infrared transmitting material that transmits infrared rays emitted from an infrared detection area such as a floor or wall in a room; a light receiving window provided below and facing the sensor cover and transmitting the infrared light; An infrared detecting element provided below the window to detect the amount of infrared light; and a cold junction reference surface of the infrared detecting element and a connection between the light receiving window and the temperature of the light receiving window. A cylindrical metal wall that transmits the cold junction reference surface to the cold junction reference surface, and a cylindrical metal wall that is provided so as to surround the outer peripheral surface of the metal wall and that transmits a temperature of the sensor cover to the cold junction reference surface. An infrared detection device comprising: a heat sink. 前記筒状のヒートシンクが、その筒低部に蓋部を有し、該蓋部が前記冷接点基準面に当接することを特徴とする請求項１に記載の赤外線検出装置。The infrared detection device according to claim 1, wherein the cylindrical heat sink has a lid at a lower part of the cylinder, and the lid contacts the cold junction reference plane. 前記センサカバーの温度を検出するカバー温度センサと、前記金属壁の温度を検出する金属壁温度センサと、を具備し、前記カバー温度センサと前記金属壁温度センサとの温度差に基づいて前記赤外線量を補正して出力することを特徴とする請求項１又は２に記載の赤外線検出装置。A cover temperature sensor for detecting a temperature of the sensor cover, and a metal wall temperature sensor for detecting a temperature of the metal wall, wherein the infrared light is detected based on a temperature difference between the cover temperature sensor and the metal wall temperature sensor. The infrared detection device according to claim 1, wherein an amount is corrected and output. 前記赤外線量を補正する時、前記センサカバーの比熱容量を考慮して補正することを特徴とする請求項３に記載の赤外線検出装置。4. The infrared detecting device according to claim 3, wherein when correcting the amount of infrared light, the correction is performed in consideration of a specific heat capacity of the sensor cover. 5. 室内の床や壁等の被赤外線検出領域から放射される赤外線を透過する受光窓と、この受光窓の下方に対向して設けられ、前記赤外線量を検出する赤外線検出素子と、この赤外線検出素子の冷接点基準面と前記受光窓との間を接続するように設けられ、前記受光窓の温度を前記冷接点基準面に伝達する筒状の金属壁と、を備えた赤外線検出装置において、
前記受光窓の上方の対向する位置に前記赤外線を透過するセンサカバーを有し、前記金属壁及び前記受光窓を覆うキャップと、このキャップのセンサカバーの温度を検出するカバー温度センサと、前記金属壁の温度を検出するカバー温度センサと、を具備し、前記カバー温度センサと前記金属壁温度センサとの温度差に基づいて前記赤外線量を補正して出力することを特徴とする赤外線検出装置。A light-receiving window that transmits infrared light radiated from an infrared-ray-detected area such as a floor or wall in a room, and an infrared detecting element that is provided opposite to and below the light-receiving window and detects the amount of infrared light; A cylindrical metal wall that is provided to connect between the cold junction reference surface and the light receiving window, and that transmits the temperature of the light receiving window to the cold junction reference surface,
A cap for covering the metal wall and the light receiving window, having a sensor cover for transmitting the infrared light at a position facing the light receiving window, a cover temperature sensor for detecting a temperature of a sensor cover of the cap, An infrared detection device, comprising: a cover temperature sensor that detects a temperature of a wall; and correcting and outputting the amount of infrared light based on a temperature difference between the cover temperature sensor and the metal wall temperature sensor. 前記赤外線量を補正する時、前記センサカバーの比熱容量を考慮して補正することを特徴とする請求項５に記載の赤外線検出装置。6. The infrared detecting apparatus according to claim 5, wherein when the infrared ray amount is corrected, the correction is performed in consideration of a specific heat capacity of the sensor cover. 前記請求項１から６までのいずれかに記載された赤外線検出装置が、室内を空調する室内ユニットに取り付けられ、前記床や壁等から放射される赤外線を介して温度を検出して制御することを特徴とする空気調和機。The infrared detection device according to any one of claims 1 to 6, which is attached to an indoor unit that air-conditions a room, detects and controls a temperature via infrared rays radiated from the floor, a wall, or the like. A characteristic air conditioner. 前記赤外線検出装置のカバー温度センサが、前記室内ユニットの室内温度を検出する室内温度センサとして活用されたことを特徴とする請求項７に記載の空気調和機。The air conditioner according to claim 7, wherein the cover temperature sensor of the infrared detection device is used as an indoor temperature sensor for detecting an indoor temperature of the indoor unit.
JP2002276953A 2002-09-24 2002-09-24 Air conditioner Expired - Lifetime JP3843922B2 (en)

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JP2007139660A (en) * 2005-11-21 2007-06-07 Nippon Ceramic Co Ltd Multi-element thermopile module
KR100769587B1 (en) 2006-04-25 2007-10-23 주식회사 이노칩테크놀로지 Non-contact ir temperature sensor
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JP2007139660A (en) * 2005-11-21 2007-06-07 Nippon Ceramic Co Ltd Multi-element thermopile module
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JP2010048644A (en) * 2008-08-21 2010-03-04 Yazaki Corp Gas sample chamber and concentration measuring instrument equipped with it
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JP2017044439A (en) * 2015-08-28 2017-03-02 パナソニックＩｐマネジメント株式会社 Air conditioner
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