JPH02210232A - Temperature detection device for combustion heaters, etc. - Google Patents
Temperature detection device for combustion heaters, etc.Info
- Publication number
- JPH02210232A JPH02210232A JP1031776A JP3177689A JPH02210232A JP H02210232 A JPH02210232 A JP H02210232A JP 1031776 A JP1031776 A JP 1031776A JP 3177689 A JP3177689 A JP 3177689A JP H02210232 A JPH02210232 A JP H02210232A
- Authority
- JP
- Japan
- Prior art keywords
- temperature detection
- reference voltage
- temperature
- detection device
- converter
- 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.)
- Granted
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Control Of Combustion (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、石油ファンヒーター、ガス給湯器等の燃焼器
具における温度検出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a temperature detection device for combustion appliances such as oil fan heaters and gas water heaters.
従来の技術
従来から、この種の温度検出装置として、第２図に示す
ような、サーミスタ等の温度検出素子２１と、前記温度
検出素子の端子電圧をディジタル値へ変換するＡ、／Ｄ
変換部２２と、中央制御装置２３とを備え、前記ディジ
タル値に基づいて、中央制御袋Ｗ２３が、表示素子２５
、モータ２６等を制御する構成が用いられている。Ａ／
Ｄ変換部２２においては、基準電圧入力部２７へ供給さ
れた基準電圧が、ｎ段階に分圧され、比較器２８へ供給
される。温度検出素子２１の端子電圧と各分圧とを逐次
、比較することによって、上記端子電圧がｎビットのデ
ィジタル値に変換される。2. Description of the Related Art Conventionally, this type of temperature detection device has been equipped with a temperature detection element 21 such as a thermistor, and A and /D for converting the terminal voltage of the temperature detection element into a digital value, as shown in FIG.
The central control bag W23 includes a converter 22 and a central controller 23, and based on the digital value, the central control bag W23 converts the display element 25
, motor 26, etc. is used. A/
In the D conversion unit 22, the reference voltage supplied to the reference voltage input unit 27 is divided into n stages and supplied to the comparator 28. By successively comparing the terminal voltage of the temperature detection element 21 and each partial voltage, the terminal voltage is converted into an n-bit digital value.
一般に、上記ビット数が多い程、高価になるため、燃焼
暖房機等に於けるＡ／Ｄ変換部には、変換ビット数が８
ビツトまでのものが多く用いられている。Generally, the higher the number of bits, the more expensive it becomes, so the A/D converter in combustion heaters etc. has a conversion bit number of 8.
Bits are often used.
発明が解決しようとする課題
しかしながら上記のような構成では、細かい単位で温度
検出を行なえば、検出できる温度範囲が狭くなり、逆に
広い温度範囲を検出しようとすれば、検出する温度の単
位が粗くなる。燃焼暖房機においては、室温表示や燃焼
制御のために、温度検出を行なっているが、室温表示に
は、比較的広い温度範囲が必要であり、一方、燃焼制御
には、近年の技術向上に伴ない、より細かい単位での温
度検出が要求されるようになってきた。従って、上記の
ような構成では、室温表示のための温度検出と、燃焼制
御のための温度検出とを兼用した場合、燃焼制御で要求
される、より細かい単位での温度検出に充分対応できな
いという課題が生じてきた。Problems to be Solved by the Invention However, with the above configuration, if temperature is detected in small units, the detectable temperature range will be narrowed, and conversely, if a wide temperature range is to be detected, the unit of temperature to be detected will be narrower. It gets rough. Combustion heaters use temperature detection to display room temperature and control combustion. However, displaying room temperature requires a relatively wide temperature range, and combustion control requires improvements in technology in recent years. As a result, temperature detection in finer units has become required. Therefore, with the above configuration, if temperature detection for room temperature display and temperature detection for combustion control are used for both purposes, it cannot sufficiently support temperature detection in finer units required for combustion control. Challenges have arisen.
本発明は、かかる課題を解消するもので、室温表示等の
広い温度検出範囲を確保するとともに、その一部の領域
において、燃焼制御等に必要な細かい単位での温度検出
を可能にすることを目的としたものである。The present invention solves this problem by ensuring a wide temperature detection range such as room temperature display, and in some areas, making it possible to detect temperature in fine units necessary for combustion control etc. This is the purpose.
課題を解決するための手段
上記課題を解決するために、本発明の温度検出装置は、
サーミスタ等の温度検出素子と前記温度検出素子の端子
間電圧をディジタル値に変換するＡ／Ｄ変換部と、上記
Ａ／Ｄ変換部へ供給する基準電圧を切変える、基準電圧
切変え部とを備えた構成とし、検出目的に応じて、中央
制御装置からの指令によってＡ／Ｄ変換部へ供給する基
準電圧を切変えられるようにしている。Means for Solving the Problems In order to solve the above problems, the temperature detection device of the present invention includes:
A temperature detection element such as a thermistor and an A/D conversion section that converts the voltage between the terminals of the temperature detection element into a digital value, and a reference voltage switching section that switches the reference voltage supplied to the A/D conversion section. According to the purpose of detection, the reference voltage supplied to the A/D converter can be changed by a command from the central controller.
作用
本発明は、上記構成によって、中央制御装置より、基準
電圧切変え部に対して、Ａ／Ｄ変換部へ供給する基１！
電圧を大きくする指令を出すと、サーミスタ等の温度検
出素子の端子電圧が、広い範囲でＡ／Ｄ変換される。逆
に、中央制御装置より、基準電圧切変え部に対して、Ａ
／Ｄ変換部へ供給する基準電圧を小さくする指令を出す
と、サーミスタ等の温度検出素子の端子電圧が、範囲は
狭くなるが、細い単位でＡ／Ｄ変換される。Effect of the present invention With the above configuration, the central controller supplies the reference voltage switching section to the A/D conversion section.
When a command to increase the voltage is issued, the terminal voltage of a temperature detection element such as a thermistor is A/D converted over a wide range. On the other hand, the central controller sends A to the reference voltage switching section.
When a command is issued to reduce the reference voltage supplied to the /D converter, the terminal voltage of a temperature detection element such as a thermistor is A/D converted in small units, although the range becomes narrower.
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
。第１図において、ｌはサーミスタ等の温度検出素子で
、この端子間電圧をＡ／Ｄ変換部２によってディジタル
値に変換し、中央制御装置３へ伝える。中央制御装置３
は、この値に基づいて、表示素子１５や、モータ１６等
を制御する。そして、Ａ／Ｄ変換部２は基準電圧入力部
１７へ供給された基準電圧が、ｎ段階に分圧され比較器
１８へ供給される。そして、この各分圧と温度検出素子
１の端子電圧とを逐次、比較することによって、上記端
子電圧がｎビットのディジタル値に変換される。４は基
準電圧切変え部で、中央制御装置３は、Ａ／Ｄ変換部２
を起動する前に、その検出目的に応じて基準電圧切変え
部４に対して基準電圧を選択する指令を出す、すなわち
、広い範囲での温度検出をする場合は、中央制御袋Ｗ３
より低レベルの信号が出力され、トランジスタ５及び６
がＯＮして、コンデンサ７の端子間電圧は、電源電圧Ｖ
ＣＣよりトランジスタ５及び６のコレクタ、エミッタ間
飽和電圧を差し引いた値とがる。一方、温度検出範囲は
、狭くなるが、細かい単位で温度検出する場合は１．中
央制御袋Ｍ３より高レベルの信号が出力され、トランジ
スタ５及び６が０ＦＦＬ、コンデンサ７の端子間電圧は
、電源電圧ＶＣＣを抵抗８，９及びｌＯにて分割した値
、すなわち、上記の如く、中央制御装置３の指令によっ
て、Ａ／Ｄ変換部２の基準電圧入力部１７へ供給する基
準電圧を切変えることができる。Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. In FIG. 1, 1 is a temperature detection element such as a thermistor, and the voltage between the terminals is converted into a digital value by an A/D converter 2 and transmitted to a central controller 3. Central control device 3
controls the display element 15, motor 16, etc. based on this value. Then, the A/D converter 2 divides the reference voltage supplied to the reference voltage input section 17 into n stages and supplies the divided voltage to the comparator 18 . By successively comparing each of these partial voltages with the terminal voltage of the temperature detection element 1, the terminal voltage is converted into an n-bit digital value. 4 is a reference voltage switching section, and the central control device 3 is an A/D conversion section 2.
Before starting up, issue a command to select the reference voltage to the reference voltage switching unit 4 according to the detection purpose, that is, when detecting temperature in a wide range, the central control bag W3
A lower level signal is output, and transistors 5 and 6
is turned on, the voltage between the terminals of the capacitor 7 becomes the power supply voltage V
It is the value obtained by subtracting the collector-emitter saturation voltage of transistors 5 and 6 from CC. On the other hand, the temperature detection range becomes narrower, but if temperature is detected in small units, 1. A high level signal is output from the central control bag M3, transistors 5 and 6 are 0FFL, and the voltage between the terminals of the capacitor 7 is the value obtained by dividing the power supply voltage VCC by the resistors 8, 9 and IO, that is, as described above. The reference voltage supplied to the reference voltage input section 17 of the A/D conversion section 2 can be changed according to a command from the central control device 3.
発明の効果
以上のように本発明の温度検出装置は、Ａ／Ｄ変換部へ
供給する基準電圧が、検出目的に応じて切変えられるの
で、室温表示等の広い範囲の温度検出と、燃焼制御用の
検出範囲は狭くなるが細かい単位での温度検出とが、一
つの装置で実現できるという利点が得られる。Effects of the Invention As described above, the temperature detection device of the present invention can change the reference voltage supplied to the A/D converter depending on the purpose of detection, so it can be used for temperature detection over a wide range such as room temperature display, and for combustion control. Although the detection range becomes narrower, the advantage is that temperature detection in finer units can be realized with one device.
第１図は、本発明の一実施例における温度検出装置の回
路図、第２図は従来の温度検出装置の回路図である。
ｌ・・・・・・温度検出素子、２・・・・・・Ａ／Ｄ変
換部、３・・・・・・中央制御装置、４・・・・・・基
準電圧切変え部。
代理人の氏名 弁理士 粟野重孝 はか１名第
図
第
図
２求
ど６FIG. 1 is a circuit diagram of a temperature detection device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional temperature detection device. 1...Temperature detection element, 2...A/D conversion unit, 3...Central control unit, 4...Reference voltage switching unit. Name of agent: Patent attorney Shigetaka Awano (1 person) Figure 2 Figure 6
Claims (1)
子間電圧をディジタル値に変換するＡ／Ｄ変換部と、上
記Ａ／Ｄ変換部から、上記ディジタル値を読み取り、そ
の値に基づいて、表示素子、モータ等を制御する中央制
御装置と、上記Ａ／Ｄ変換部へ供給する基準電圧を切変
える基準電圧切変え部とを備え、上記中央制御装置から
の指令によって、上記Ａ／Ｄ変換部へ供給する基準電圧
を切変えられることを特徴とする燃焼暖房機等の温度検
出装置。A temperature detecting element such as a thermistor, an A/D converter that converts the voltage between the terminals of the temperature detecting element into a digital value, and a digital value read from the A/D converter and displayed based on the value. A central control device that controls elements, motors, etc., and a reference voltage switching section that switches a reference voltage supplied to the A/D conversion section, and the A/D conversion section A temperature detection device for a combustion heater, etc., characterized in that the reference voltage supplied to the device can be changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1031776A JPH0814514B2 (en) | 1989-02-10 | 1989-02-10 | Temperature detectors for combustion heaters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1031776A JPH0814514B2 (en) | 1989-02-10 | 1989-02-10 | Temperature detectors for combustion heaters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02210232A true JPH02210232A (en) | 1990-08-21 |
| JPH0814514B2 JPH0814514B2 (en) | 1996-02-14 |
Family
ID=12340456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1031776A Expired - Lifetime JPH0814514B2 (en) | 1989-02-10 | 1989-02-10 | Temperature detectors for combustion heaters |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0814514B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0545232A (en) * | 1991-08-19 | 1993-02-23 | Zexel Corp | Temperature sensing device |
| JP2008170074A (en) * | 2007-01-12 | 2008-07-24 | Fujitsu General Ltd | Electronic equipment with sensor circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55476A (en) * | 1979-04-09 | 1980-01-05 | Seiko Epson Corp | Digital thermometer |
| JPS55131736A (en) * | 1979-03-30 | 1980-10-13 | Sanyo Electric Co Ltd | Temperature measuring device |
| JPS5858429A (en) * | 1981-09-30 | 1983-04-07 | Matsushita Electric Works Ltd | Electronic thermometer |
| JPS6415622A (en) * | 1987-07-09 | 1989-01-19 | Ricoh Kk | Measuring method for temperature |
-
1989
- 1989-02-10 JP JP1031776A patent/JPH0814514B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131736A (en) * | 1979-03-30 | 1980-10-13 | Sanyo Electric Co Ltd | Temperature measuring device |
| JPS55476A (en) * | 1979-04-09 | 1980-01-05 | Seiko Epson Corp | Digital thermometer |
| JPS5858429A (en) * | 1981-09-30 | 1983-04-07 | Matsushita Electric Works Ltd | Electronic thermometer |
| JPS6415622A (en) * | 1987-07-09 | 1989-01-19 | Ricoh Kk | Measuring method for temperature |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0545232A (en) * | 1991-08-19 | 1993-02-23 | Zexel Corp | Temperature sensing device |
| JP2008170074A (en) * | 2007-01-12 | 2008-07-24 | Fujitsu General Ltd | Electronic equipment with sensor circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0814514B2 (en) | 1996-02-14 |
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