JPH0672811B2 - Thermal detector - Google Patents
Thermal detectorInfo
- Publication number
- JPH0672811B2 JPH0672811B2 JP61192308A JP19230886A JPH0672811B2 JP H0672811 B2 JPH0672811 B2 JP H0672811B2 JP 61192308 A JP61192308 A JP 61192308A JP 19230886 A JP19230886 A JP 19230886A JP H0672811 B2 JPH0672811 B2 JP H0672811B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heating element
- heat
- fixed resistor
- constant
- 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 - Fee Related
Links
- 238000010438 heat treatment Methods 0.000 claims description 35
- 239000000126 substance Substances 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims 1
- 230000009849 deactivation Effects 0.000 claims 1
- 239000003570 air Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 230000035807 sensation Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 230000000875 corresponding effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 241000282412 Homo Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Radiation Pyrometers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、人間に快適な環境を提供する空気調和装置に
おける環境の温熱状態を検知する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting a thermal state of an environment in an air conditioner that provides a comfortable environment for humans.
従来の技術 本発明に先立ち考えられた構成を第６図を用いて説明す
る。第６図において１はサーミスタを用いた発熱素子で
あり、発熱素子１の外側に輻射熱を透過するポリエチレ
ン樹脂で形成された球形のカバー２が設けられかつ前記
球形カバー２には気流を減衰させて前記発熱素子１の周
囲に導くための開口３が設けられている。前記発熱素子
１は制御手段４により、常に一定の温度に発熱するよう
制御されるが、このとき前記球形カバー２によって前記
発熱素子１の対流熱伝達率及び輻射熱伝達率の値が概略
人体の値と等価になっているため制御手段４の制御負荷
の信号から判断手段５において人体の温熱感覚に対応す
る情報が得られるようになっていた。2. Description of the Related Art A configuration considered prior to the present invention will be described with reference to FIG. In FIG. 6, reference numeral 1 is a heating element using a thermistor, and a spherical cover 2 made of polyethylene resin that transmits radiant heat is provided outside the heating element 1 and the spherical cover 2 is used to attenuate the air flow. An opening 3 is provided for guiding around the heating element 1. The heating element 1 is controlled by the control means 4 so as to always generate heat at a constant temperature. At this time, the convective heat transfer coefficient and the radiant heat transfer coefficient of the heating element 1 are substantially the same as those of the human body by the spherical cover 2. Therefore, the determination means 5 can obtain information corresponding to the thermal sensation of the human body from the signal of the control load of the control means 4.
発明が解決しようとする問題点 しかしながら上記のような構成では、発熱素子を一定の
温度に常に発熱させておく必要があるため、特に電池を
電源として使用した場合に、電池の消耗が早く、実用的
でないという問題点を有していた。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned configuration, since the heating element needs to be constantly heated to a constant temperature, the battery is consumed quickly and practically used especially when the battery is used as a power source. It had a problem that it was not appropriate.
本発明はかかる従来の問題を解消するもので、簡単な電
気回路の付加により、少ない部品構成と簡潔な構造によ
る高生産性と低価格を維持しながら、消費電力を抑える
ことにより電池駆動をも可能にし、気温・気流・輻射温
の人体に対する温熱的影響の一括検知を自己発熱する素
子と簡単な回路で実現することにより、空気調和装置の
きめ細かい制御とそれによる、快適な温熱空間の提供を
目的とする。The present invention solves the above-mentioned conventional problems, and by adding a simple electric circuit, while maintaining high productivity and low cost with a small number of parts and a simple structure, battery driving is possible by suppressing power consumption. By making it possible to perform batch detection of thermal effects on the human body such as air temperature, air flow, and radiant temperature with self-heating elements and a simple circuit, fine control of the air conditioner and provision of a comfortable warm space can be provided. To aim.
問題点を解決するための手段 上記問題点を解決するために本発明の温熱検知装置は、
自身の温度により電気抵抗値が変化する物質からなる発
熱素子と、前記発熱素子への輻射熱を透過しかつ気流を
減少させるカバーと、前記発熱素子を一定の温度に維持
する制御手段と、前記発熱素子の温度を一定にするため
に前記制御手段から前記発熱素子へ供給される電力の変
化から環境の温熱状態を判断する判断手段と、気温を検
知する温度検知体と、前記温度検知体の信号により前記
発熱素子への通電を制限する電力制限手段とからなる構
成としたものである。Means for Solving the Problems In order to solve the above problems, the heat detection device of the present invention is
A heat-generating element made of a substance whose electric resistance value changes according to its own temperature, a cover which transmits radiant heat to the heat-generating element and reduces an air flow, a control means for maintaining the heat-generating element at a constant temperature, and the heat generation. Judging means for judging the thermal state of the environment from the change of the electric power supplied from the control means to the heating element in order to keep the temperature of the element constant, a temperature detector for detecting the temperature, and a signal of the temperature detector. Therefore, a power limiting means for limiting the power supply to the heating element is provided.
作用 本発明は上記した構成によって、温度検知体により検知
した周囲気温に応じて、前記電力制限手段によって電力
を抑え、測定時には、前記発熱素子が前記カバーを通し
て周囲の物体、日射と輻射熱交換するとともに周囲空気
と対流熱交換を行うが、このとき前記カバーによって前
記発熱素子と周囲環境との対流熱伝達および輻射熱伝達
の割合を人体のそれと概略一致させているため、前記発
熱素子を前記制御手段によって一定温度に維持するため
の負荷の大小が人体の体温を一定に維持するための負荷
に対応して得られる、これを電気信号として取り出し、
この出力から人体の温熱感覚を省電力にて判断すること
ができる。Effect The present invention has the above-mentioned configuration, and suppresses the electric power by the electric power limiting means in accordance with the ambient temperature detected by the temperature detecting body, and at the time of measurement, the heating element exchanges radiant heat with the surrounding objects, the solar radiation through the cover. Convective heat exchange with the ambient air is performed.At this time, since the ratio of the convective heat transfer and the radiant heat transfer between the heat generating element and the surrounding environment is made substantially equal to that of the human body by the cover, the heat generating element is controlled by the control means. The magnitude of the load for maintaining a constant temperature is obtained corresponding to the load for maintaining the body temperature of the human body constant, and this is taken out as an electric signal,
From this output, the thermal sensation of the human body can be determined with power saving.
実施例 以下、本発明の実施例を添付図面にもとづいて説明す
る。Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図に本発明の温熱検知装置のブロック図を示す。１
はサーミスタを用いた発熱素子であり、第２図の一部切
欠斜視図に詳しく示すように、前記発熱素子１の外側に
輻射熱を透過するポリエチレン等の樹脂で形成されたカ
バー２が設けられかつ前記カバー２には気流を減衰させ
て前記発熱素子１の周囲に導くための開口３が多数設け
られている。前記発熱素子１はサーミスタを用いた温度
検知体６の検知した気温が電力制限手段７における条件
を満たした時に、制御手段４により、常に一定の温度に
発熱するよう制御され、このときの前記制御手段４の制
御負荷の信号から判断手段５において人体の温熱感覚に
対応する情報が得られる。FIG. 1 shows a block diagram of the heat detection device of the present invention. 1
Is a heating element using a thermistor. As shown in detail in the partially cutaway perspective view of FIG. 2, a cover 2 made of a resin such as polyethylene that transmits radiant heat is provided outside the heating element 1. The cover 2 is provided with a number of openings 3 for attenuating the air flow and guiding the air around the heat generating element 1. When the temperature detected by the temperature detector 6 using a thermistor satisfies the condition of the power limiting means 7, the heating element 1 is controlled by the control means 4 so as to always generate heat at a constant temperature. Information corresponding to the thermal sensation of the human body is obtained in the judging means 5 from the signal of the control load of the means 4.
第３図は前記制御手段４及び前記電力制限手段７の構成
を示す回路図であり、この図を用いて詳細に説明する。
前記制御手段４は、前記発熱素子１と、演算増幅器８及
び固定抵抗器９、固定抵抗器10、固定抵抗器11とで前記
発熱素子１の温度を一定に制御する構成としている。FIG. 3 is a circuit diagram showing the configurations of the control means 4 and the power limiting means 7, which will be described in detail with reference to this figure.
The control means 4 is configured to control the temperature of the heating element 1 to be constant by the heating element 1, the operational amplifier 8, the fixed resistor 9, the fixed resistor 10 and the fixed resistor 11.
前記電力制限手段７は、サーミスタ温度検知体６、固定
抵抗器12、固定抵抗器13、固定抵抗器14、演算増幅器15
及びダイオード16、固定抵抗器17、トランジスタ18、固
定抵抗器19、固定抵抗器24、トランジスタ25、固定抵抗
器26、トランジスタ27、発光素子（LED）28、固定抵抗
器29からなる構成としている。The power limiting means 7 includes a thermistor temperature detector 6, a fixed resistor 12, a fixed resistor 13, a fixed resistor 14, and an operational amplifier 15.
And a diode 16, a fixed resistor 17, a transistor 18, a fixed resistor 19, a fixed resistor 24, a transistor 25, a fixed resistor 26, a transistor 27, a light emitting element (LED) 28, and a fixed resistor 29.
前記電力制限手段７は、前記固定抵抗器13と、前記固定
抵抗器14との抵抗の比あるいは、前記固定抵抗器13と前
記固定抵抗器17の並列合成抵抗と、前記固定抵抗器14の
抵抗比で決まる電圧Vcを前記演算増幅器15の非反転入力
端子20に、前記温度検知体６と、前記固定抵抗器12との
抵抗比で決まる電圧Vvを前記演算増幅器15の反転入力端
子21に入力するように接続してある。これにより前記温
度検知体６の検知する環境の温度Taが、一定温度Ts1よ
りも高いとき（Ta＞Ts1）、前記演算増幅器15の出力22
はハイとなり前記固定抵抗器19を介して前記トランジス
タ18のベースに電流が流れ前記トランジスタ18がオンす
ることにより前記制御回路４が動作する。また、前記温
度検知体６の検知する環境の温度Taが、一定温度Ts2よ
りも低いとき（Ta＜Ts2）、前記演算増幅器15の出力22
はローとなり前記トランジスタ18はオフするため、の前
記制御回路４は動作を停止する。ここで、動作温度Ts1
と停止温度Ts2は、前記固定抵抗器17と前記ダイオード1
6により第４図に示す様に前記温度検知体６の検知する
温度と、前記トランジスタ18のオン・オフの関係にヒス
テリシスを持たせることにより、ハンチングを防止して
いる。The power limiting means 7 is configured such that the ratio of the resistances of the fixed resistor 13 and the fixed resistor 14 or the parallel combined resistance of the fixed resistor 13 and the fixed resistor 17, and the resistance of the fixed resistor 14. The voltage Vc determined by the ratio is input to the non-inverting input terminal 20 of the operational amplifier 15, and the voltage Vv determined by the resistance ratio of the temperature detecting body 6 and the fixed resistor 12 is input to the inverting input terminal 21 of the operational amplifier 15. Connected to do so. Thus, when the temperature Ta of the environment detected by the temperature detector 6 is higher than the constant temperature Ts 1 (Ta> Ts 1 ), the output 22 of the operational amplifier 15
Becomes high, a current flows through the fixed resistor 19 to the base of the transistor 18, and the transistor 18 is turned on to operate the control circuit 4. When the temperature Ta of the environment detected by the temperature detector 6 is lower than the constant temperature Ts 2 (Ta <Ts 2 ), the output 22 of the operational amplifier 15
Goes low, turning off the transistor 18, so that the control circuit 4 stops operating. Where operating temperature Ts 1
And the stop temperature Ts 2 are the fixed resistor 17 and the diode 1
As shown in FIG. 4, hunting is prevented by providing a hysteresis between the temperature detected by the temperature detector 6 and the on / off state of the transistor 18 as shown in FIG.
前記制御手段４が動作すると前記発熱素子１は前記発熱
素子１自身の温度抵抗特性、前記固定抵抗器９、前記固
定抵抗器10、前記固定抵抗器11の抵抗値と電源電圧、前
記演算増幅器８での電圧降下等で決定されるある一定温
度に発熱するが、ここで環境の気温・気流・輻射温度の
何れかが変化して発熱素子の温度を低下させるように働
くと、サーミスタである発熱素子１の抵抗が上りｂ点の
電位が上昇するので、前記演算増幅器８によりａ点とｂ
点の電位差が増幅されｃ点の電位が上昇しその結果前記
発熱素子１に流れる電流が増加する、この電流の増加に
より前記発熱素子１の発熱量が大きくなり、前記発熱素
子１の温度が上昇し、元の温度で安定する。このときｂ
点の電位をボルテージフォロワ23を介して前記判断手段
５に取り出す。When the control means 4 operates, the heating element 1 causes the temperature resistance characteristic of the heating element 1 itself, the resistance value and power supply voltage of the fixed resistor 9, the fixed resistor 10, the fixed resistor 11, and the operational amplifier 8 to operate. It heats up to a certain temperature determined by the voltage drop in the environment, but if any of the ambient air temperature, air flow, or radiant temperature changes here and it acts to lower the temperature of the heating element, the heat generated by the thermistor is generated. Since the resistance of the element 1 rises and the potential at the point b rises, the operational amplifier 8 causes the point a and the point b
The potential difference at the point is amplified and the potential at the point c rises, resulting in an increase in the current flowing through the heating element 1. Due to this increase in the amount of heat generated by the heating element 1, the temperature of the heating element 1 rises. And stabilizes at the original temperature. At this time b
The potential at the point is taken out to the judging means 5 via the voltage follower 23.
さらに、固定抵抗器24、トランジスタ25、固定抵抗器2
6、トランジスタ27、LED28、固定抵抗器29は、前記LED2
4を前記制御手段４の動作停止時に点灯することにより
前記制御手段４の動作停止が目視で確認できるよう設け
たものであり、かつｄ点の信号を前記判断手段５に入力
して環境状態の判断に用いることが可能である。In addition, fixed resistor 24, transistor 25, fixed resistor 2
6, transistor 27, LED28, fixed resistor 29, the LED2
It is provided so that the operation stop of the control means 4 can be visually confirmed by turning on 4 when the operation of the control means 4 is stopped, and the signal at the point d is input to the judgment means 5 to indicate the environmental condition. It can be used for judgment.
前記発熱素子１の表面と環境との熱収支は次式で示され
る。The heat balance between the surface of the heating element 1 and the environment is expressed by the following equation.
Ｑ＝αｃ（Ts−Ta）＋αｒ（Ts−Tr） ……（１） ただし、 Q:発熱素子の単位表面積当りの放熱量（発熱素子の温度
を一定に制御するための負荷） αｃ：発熱素子と環境との対流熱伝達率 Ts:発熱素子の温度（一定に制御） Ta:気温 αｒ：発熱素子と環境との輻射熱伝達率 Tr:周囲輻射温度 ここで前記発熱素子１の表面の輻射熱伝達率αｒを人体
の表面の輻射熱伝達率と概略一致させており、前記カバ
ーの開口３は前記発熱素子１の対流熱伝達率αｃを人体
の平均対流熱伝達率と概略等しくするよう設けているた
め、得られる熱的負荷は同じ環境でその体温を維持する
のに必要な負荷と高い相関が得られる。あらかじめ判断
手段５にはワンチップマイコンのROMの中にサーミスタ
の非線型性を補正するためのテーブル及び第５図に示す
ような前記制御手段４により得られる負荷信号と人体の
温熱感覚との関係を数式あるいはテーブルのかたちでも
っており、これによってその環境における気温・気流・
輻射温によって生じる人体の温熱感覚とほぼ等価な出力
が得られるので、この感覚が中立になるように空調機器
を制御すれば、常に快適な環境が維持される。Q = αc (Ts-Ta) + α r (Ts-Tr) ...... (1) However, Q: (load for controlling the temperature of the heating element constant) amount of heat radiation per unit surface area of the heat generating element alpha c: Convection heat transfer coefficient between heat generating element and environment Ts: Temperature of heat generating element (controlled to be constant) Ta: Air temperature α r : Radiant heat transfer coefficient between heat generating element and environment Tr: Ambient radiant temperature where the surface of the heat generating element 1 The radiant heat transfer coefficient α r is approximately matched with the radiant heat transfer coefficient on the surface of the human body, and the opening 3 of the cover makes the convective heat transfer coefficient α c of the heating element 1 approximately equal to the average convective heat transfer coefficient of the human body. Because of the provision, the resulting thermal load is highly correlated with the load required to maintain that body temperature in the same environment. A table for correcting the non-linearity of the thermistor is stored in the ROM of the one-chip microcomputer in advance in the judging means 5, and the relationship between the load signal obtained by the control means 4 as shown in FIG. 5 and the thermal sensation of the human body. Is expressed in the form of a mathematical formula or table, which allows the temperature, airflow, and
Since an output almost equivalent to the thermal sensation of the human body caused by the radiant temperature can be obtained, if the air conditioner is controlled so that this sensation is neutral, a comfortable environment is always maintained.
上記構成によれば、周囲の気温を検知して回路の作動・
停止の判断を行うためそのための回路が簡単に構成でき
また、回路の作動・停止の温度にヒステリシスを設けた
こともあいまって、確実な動作が行える。また、測定停
止時にLEDを点灯させているためその状態が目視で簡単
に把握出来る。さらに本構成においては、ボルテージフ
ォロワ23の出力に電圧計を接続しその目盛を温冷感に対
応した目盛とすることにより、携帯用の温熱検知装置と
して単独で用いることも可能である。According to the above configuration, the ambient temperature is detected to activate the circuit.
A circuit for that purpose can be easily configured to determine whether or not to stop, and a reliable operation can be performed due to the fact that a hysteresis is provided for the temperature at which the circuit operates and stops. Moreover, since the LED is turned on when the measurement is stopped, the state can be easily grasped visually. Further, in the present configuration, a voltmeter is connected to the output of the voltage follower 23, and the scale is a scale corresponding to the thermal sensation, so that it can be used alone as a portable thermal detection device.
なお、ここではサーミスタにより周囲気温を検知して、
制御手段の作動・停止を行ったが、熱電対あるいは白金
抵抗体等の温度検知体を用いても良い。In addition, here, the ambient temperature is detected by the thermistor,
Although the control means is operated / stopped, a temperature detecting body such as a thermocouple or a platinum resistor may be used.
発明の効果 以上のように本発明の温熱検知装置によれば、周囲環境
の状態に応じて発熱素子への通電を制限するため、電力
の消費を節約することができ省エネルギーであり、電池
駆動での電池の長寿命化が図れる。EFFECTS OF THE INVENTION As described above, according to the thermal detection device of the present invention, since the energization of the heating element is restricted according to the state of the surrounding environment, it is possible to save the consumption of electric power and save energy, and to drive the battery. The battery life can be extended.
第１図は本発明の一実施例の温熱検知装置の構成を示す
ブロック図、第２図は同装置の発熱素子およびカバーの
構成を示す一部分切欠斜視図、第３図は同装置の実施例
の制御手段と電力制限手段の回路図、第４図は同装置の
電力節約手段の動作を示す特性図、第５図は同装置の判
断手段での判断内容を示す特性図、第６図は従来の温熱
検知装置の検知体の構造を示す構成を示す一部切欠斜視
図を含むブロック図である。 １……発熱素子、２……カバー、４……制御手段、５…
…判断手段、６……温度検知体、７……電力制限手段。FIG. 1 is a block diagram showing the structure of a heat detecting device according to an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view showing the structure of a heating element and a cover of the device, and FIG. 3 is an embodiment of the device. Fig. 4 is a circuit diagram of the control means and power limiting means of Fig. 4, Fig. 4 is a characteristic diagram showing the operation of the power saving means of the device, Fig. 5 is a characteristic diagram showing the contents of judgment by the judging means of the device, and Fig. 6 is It is a block diagram including a partial cutaway perspective view showing composition showing a structure of a sensing object of a conventional warmth sensing device. 1 ... Heating element, 2 ... Cover, 4 ... Control means, 5 ...
... Judgment means, 6 ... Temperature detector, 7 ... Power limiting means.
Claims (3)
質からなる発熱素子と、前記発熱素子への輻射熱を透過
しかつ気流を減少させるカバーと、前記発熱素子を一定
の温度に維持する制御手段と、前記発熱素子の温度を一
定にするために前記制御手段から前記発熱素子へ供給さ
れる電力の変化から環境の温熱状態を判断する判断手段
と、気温を検知する温度検知体と、前記温度検知体の信
号により前記発熱素子への通電を制御する電力制限手段
からなる温熱検知装置。1. A heating element made of a substance whose electric resistance changes according to its own temperature, a cover for transmitting radiant heat to the heating element and reducing an air flow, and a control for maintaining the heating element at a constant temperature. Means for determining the temperature of the environment from the change in the electric power supplied from the control means to the heating element in order to keep the temperature of the heating element constant, and a temperature detector for detecting the temperature. A heat detecting device comprising a power limiting means for controlling energization of the heating element according to a signal from a temperature detector.
又は停止し、かつ作動と停止の温度にヒステリシスを持
つ特許請求の範囲第１項記載の温熱検知装置。2. The heat detecting device according to claim 1, wherein the power limiting means activates or deactivates the energization of the heating element and has a hysteresis in the temperature of activation and deactivation.
したときに、発光素子を点灯させ、かつ停止信号を出力
する端子を持つ特許請求の範囲第１項記載の温熱検知装
置。3. The heat detecting device according to claim 1, wherein the power limiting means has a terminal for turning on the light emitting element and outputting a stop signal when power supply to the heating element is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61192308A JPH0672811B2 (en) | 1986-08-18 | 1986-08-18 | Thermal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61192308A JPH0672811B2 (en) | 1986-08-18 | 1986-08-18 | Thermal detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6348419A JPS6348419A (en) | 1988-03-01 |
| JPH0672811B2 true JPH0672811B2 (en) | 1994-09-14 |
Family
ID=16289112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61192308A Expired - Fee Related JPH0672811B2 (en) | 1986-08-18 | 1986-08-18 | Thermal detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672811B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7849682B2 (en) * | 2021-04-05 | 2026-04-22 | 有限会社住空想建築工房 | Ventilation system |
-
1986
- 1986-08-18 JP JP61192308A patent/JPH0672811B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6348419A (en) | 1988-03-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |