JPS5914019A - Controller of heater - Google Patents

Controller of heater

Info

Publication number
JPS5914019A
JPS5914019A JP57123669A JP12366982A JPS5914019A JP S5914019 A JPS5914019 A JP S5914019A JP 57123669 A JP57123669 A JP 57123669A JP 12366982 A JP12366982 A JP 12366982A JP S5914019 A JPS5914019 A JP S5914019A
Authority
JP
Japan
Prior art keywords
temperature
heater
heated
power
switch
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.)
Pending
Application number
JP57123669A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Ueno
上野 義之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP57123669A priority Critical patent/JPS5914019A/en
Publication of JPS5914019A publication Critical patent/JPS5914019A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/275Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes of temperature
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/1906Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1912Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of Temperature (AREA)

Abstract

PURPOSE:To prolong the life of a heater, by arranging a temperature switch to be opened at the upper limit temperature or more and a high power setter, and a temperature switch to be closed at the upper limit temperature or more and a low power setter in parallel, respectively. CONSTITUTION:An object to be heated is heated at high electric power W1 when the peripheral temperature is maximum B, but excess heat more than necessary causes the upper limit TH of a controlling range to be exceeded. However, a temperature switch 23a is opened and a temperature switch 23b is closed immediately after exceeding the upper limit TH, so that low electric power W2 is supplied to the heater and the object to be heated is heated by a low output. Since sufficient heat to be required at the maximum of peripheral temperature is supplied, the temperature of the object to be heated is reduced because heat supplied from the initial status is finally reduced, and balanced status is kept in the control range.

Description

【発明の詳細な説明】 この発明は1例えば配管及び機器類を特車される温度範
囲で保温するような電気式ヒートレス等の温度制御装置
において、ヒータ?=供給する電力を制御するヒータ制
御装置C二関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention provides: (1) A temperature control device such as an electric heatless device that keeps piping and equipment warm within the temperature range of a special vehicle. = Heater control device C that controls the supplied power.

一般(=電気式の温度制御装置では、一定温度(=維持
したい被加熱体の温度を検知して、ヒータ制御装置C二
より間欠的にヒータへ電力を供給し、この供給される電
カー=対応して発熱するヒータで被加熱体に熱量を与え
、被加熱体の温度制御を行なっている。
In general (= electric temperature control device), it detects the temperature of the object to be heated which is to be maintained at a constant temperature (= The temperature of the heated object is controlled by applying a corresponding amount of heat to the heated object using a heater that generates heat.

上記ヒータ制御装置は被加熱体の温度を検知し、高設定
温度で回路を開き、低設定温度で回路を閉じる温度スイ
ッチで構成され、この温度スイッチを電源回路とヒータ
とでつくられるヒータ回路の中に組み込まれるものであ
る。すなわち、被加熱体をヒータで加熱し、その被加熱
体の温度が高設定温度以上になると温度スイッチが開い
てヒータ回路を開回路とし、ヒータへの電力供給v遮断
Tる。そして、低設定温度まで温度が下がると温度スイ
ッチが閉じてヒータ回路を閉回路とし、再びヒータに電
力な供給して被加熱体を加熱する。
The heater control device described above is composed of a temperature switch that detects the temperature of the heated object, opens the circuit at a high set temperature, and closes the circuit at a low set temperature. It is incorporated inside. That is, a heated object is heated by a heater, and when the temperature of the heated object exceeds a high set temperature, a temperature switch is opened to open the heater circuit, and power supply to the heater is cut off. Then, when the temperature drops to the low set temperature, the temperature switch closes to close the heater circuit, and power is supplied to the heater again to heat the object to be heated.

一方、使用するヒータは周囲温度が最低の時(冬期等)
4二おいても被加熱体の温度維持に十分な熱容量をもつ
ことが必要であり、またヒータの単位出力区分が製作の
都合上段階的に区分されている。したがって必要な出力
と一致したヒータを選定することは困難であることがら
比較的6二容量の大きなヒータを選定している。
On the other hand, the heater is used only when the ambient temperature is at its lowest (such as during winter).
42 also needs to have sufficient heat capacity to maintain the temperature of the heated object, and the unit output of the heater is divided into stages for convenience of manufacture. Therefore, it is difficult to select a heater that matches the required output, so a heater with a relatively large capacity is selected.

しかし、上記のような容量の大きいヒータでは周囲温度
が最高となるとき(夏期等)においては必要熱容量より
相当過大な容量となるので、上記のようなヒータ制御装
置ではm度スイッチが頻繁に開閉されることになる。こ
れにしたがってヒータへの供給電力を断続するためヒー
トサイクル(ヒータの発熱する時間間隔)が短くなり、
断続する高電力によってヒータ芯線が減耗し、ヒータの
寿命を縮めることになる。また。
However, in the case of a large-capacity heater like the one mentioned above, when the ambient temperature is at its highest (such as in the summer), the heat capacity becomes considerably larger than the required heat capacity, so in the heater control device like the one mentioned above, the m-degree switch frequently opens and closes. will be done. Accordingly, the power supply to the heater is intermittent, which shortens the heat cycle (the time interval during which the heater generates heat).
Intermittent high power consumption causes wear and tear on the heater core wire, shortening the lifespan of the heater. Also.

被加熱体I:過大な熱!7¥間欠1=与えるため、熱疲
労によって損傷することもあり、好ましくない。
Heated object I: Excessive heat! 7¥ Intermittent 1 = feeding, which may cause damage due to thermal fatigue, which is not desirable.

この発明は上記欠点な改善してヒータ出力を適正値(二
設定できるようにしてヒータ芯線の減耗を防ぎヒータの
寿命を延ばすと共に、被加熱体、例えば金属シースの熱
疲労(二よる損島を防止することができるヒータ制御装
置を提供するものである。
This invention improves the above-mentioned drawbacks and makes it possible to set the heater output to an appropriate value (2), thereby preventing wear and tear on the heater core wire and prolonging the life of the heater. The present invention provides a heater control device that can prevent such problems.

すなわちこの発明におけるヒータ制御装置は、上限温度
スイッチと高電力設定器、及び上限温間以上で閉じる温
度スイッチと低電力設定器を並列に配置して′m力制御
器へ接続しているものである。
That is, the heater control device according to the present invention has an upper limit temperature switch, a high power setting device, and a temperature switch that closes above the upper limit temperature and a low power setting device arranged in parallel and connected to a power controller. be.

以下1図面C二ついてこの発明の一実施例を説明する。An embodiment of the present invention will be described below with reference to one drawing and two drawings.

第1図に示すようC二、配管や機器等の被加熱体11を
一定温度1″−維持する電気式ヒー))レヌ12は電源
回路13を備えている。この電源回路13はヒータ14
の最高出力時に対する電力を供給する交流電源であり、
ヒータ制御装置15を介してヒータJ41″−電力を供
給する。このヒータ制御装置15は被加熱体11の温度
を検知し、その温度が設定される範囲(二収まるよう1
″−電力を制御するものである。ヒータ14は容量が被
加熱体1)の周囲温度最低のときC二必要な容量以上(
およそ1.5〜2倍)のものを使用し、被加熱体1ノ(
二近接させて設置する。すなわち、電源回路13からの
電力なヒータ制御装置15で必要熱量に相当する電力(
二制御してヒータ14に供給し、被加熱体11(:熱1
を与えるものである。
As shown in FIG.
It is an AC power supply that supplies power at the maximum output of
Electric power is supplied to the heater J41'' via the heater control device 15. This heater control device 15 detects the temperature of the heated object 11, and adjusts the temperature within the set range (2
'' - This is to control the electric power.The heater 14 has a capacity that is greater than or equal to the required capacity (C2) when the ambient temperature of the heated object 1) is the lowest.
Approximately 1.5 to 2 times) is used, and one heated object (
Install the two in close proximity. In other words, the heater control device 15 receives electric power (from the power supply circuit 13) corresponding to the required amount of heat.
Heat 1 is supplied to the heater 14 under two control, and
It gives

第2図は上記ヒータ制御装置15の構成な示Tもので1
図示しない電源回路13と接続される入力端子16&I
、16bを%電源スイッチ17を介して図示しないヒー
タ14と接続される、出力端子18a、18bl二接続
し、ヒータ回路19’4f構成する。そして、ヒータ回
路19の一方の線路1例えば出力端子18aの回路にト
ライアック20を直列に接続する。このトライアック2
0はゲートGから入力する位相パルス信号に従って、ヒ
ータ回路19を流れる交流電流を半周期毎にスイッチン
グして通電時間を制御するもので、ゲー)Gl二対して
制御回路21から位相制御されるゲートパルス信号を与
える。
FIG. 2 shows the configuration of the heater control device 15.
Input terminal 16&I connected to power supply circuit 13 (not shown)
, 16b are connected to output terminals 18a and 18bl, which are connected to a heater 14 (not shown) via a power switch 17, thereby forming a heater circuit 19'4f. Then, the triac 20 is connected in series to one line 1 of the heater circuit 19, for example, to the circuit of the output terminal 18a. This triac 2
0 controls the energization time by switching the alternating current flowing through the heater circuit 19 every half cycle according to the phase pulse signal input from the gate G. Give a pulse signal.

この制御回路21は電源回路13で発生Tる交流電流と
同周期のパルス信号を発信し、このパルス信号を入力さ
れる電圧変化に比例して位相tずらし、この位相パルス
信@を上記トライアック20のゲートGに供給Tるもの
である。すなわち、この制御回路2ノとトライアック2
0とで電力制御器22を構成し、入力される電圧値に従
ってヒータ回路19を流れる電流を制御して電力を設定
している。この電力制御器22に対する位相制御用の入
力電圧回路は温度スイッチ23aと高電力設定器34g
からなる第1の回路A、及び温度スイッチ23bと低電
力設定器24bからなる第2の回路Bとからなり、温度
スイッチ23aあるいは23bの一方を閉路すること(
−よって、直列抵抗でなる高あるいは低電力設定器24
m、24bで設定される電圧信号を制御回路21に供給
するようになる。
This control circuit 21 transmits a pulse signal having the same period as the alternating current T generated in the power supply circuit 13, shifts the phase t of this pulse signal in proportion to the input voltage change, and transmits this phase pulse signal @ to the triac 20. This is what is supplied to the gate G of the circuit. In other words, this control circuit 2 and triac 2
0 constitutes a power controller 22, which controls the current flowing through the heater circuit 19 according to the input voltage value to set the power. The input voltage circuit for phase control for this power controller 22 includes a temperature switch 23a and a high power setting device 34g.
and a second circuit B consisting of a temperature switch 23b and a low power setting device 24b.
- thus a high or low power setting device 24 consisting of a series resistor;
The voltage signal set by m and 24b is supplied to the control circuit 21.

ここで電力設定器34a、24bはそれぞれ独立した可
変抵抗器でなり、その抵抗値を設定することによって制
御回路211二人力される電圧を設定するもので、高電
力設定器24Bではヒータ14へ周囲温度の設計最低峙
(冬期等)(=おいて温度制御範囲内(二保持Tるため
に必要な電力を供給するよう)=抵抗値を設定する。ま
た。
Here, the power setters 34a and 24b are each independent variable resistors, and by setting their resistance values, the voltage applied to the control circuit 211 is set. Set the resistance value at the designed minimum temperature (winter, etc.) within the temperature control range (to supply the power necessary to maintain the temperature).Also.

低電力設定器J?4bでは周囲温度の設計最高時(夏期
等)において上記高電力設定器j4bと同様喀二抵抗値
を設定する。そして、上記温度スイッチ23ta、23
bは被加熱体シー直接取り付けられるもので、温度スイ
ッチ23aは温間制御範囲の上限値以上(二なると開き
、その後制御範囲の下限値以下になると再び閉じるスイ
ッチとし、また温度スイッチ2Jbは制御範囲の上限値
以上になると閉じてその後制御範囲のト限値以下になる
と開くスイッチとする。
Low power setting device J? 4b sets the double resistance value at the designed maximum ambient temperature (summer, etc.) in the same way as the high power setting device j4b. Then, the temperature switches 23ta, 23
Temperature switch 23a is a switch that is directly attached to the heated body seam, and temperature switch 23a is a switch that opens when the upper limit of the warm control range is exceeded (2), and then closes again when the temperature falls below the lower limit of the control range. The switch closes when the control range exceeds the upper limit and then opens when the control range falls below the upper limit.

すなわち、被加熱体11の温度(=対応して温度スイッ
チ23a 、23bのどちらか一方が閉じており、温度
スイッチ23mが閉じていれば高電力設定器24aで設
定されている電圧が電力制御器22(二供給される。そ
して、この電力制御器22では制御回路2](二よって
供給された電圧値(−従ってパルス信号の位相を設定し
、この位相設定されたゲートパルス信号をトライアック
20に供給する。そして、トライアック20によって供
給されたゲートパルス信号に従ってヒータ回路19vス
イツチングし、ヒータ回路〕9を流れる交流電tMを半
周期毎(二通電位相を制御し、ヒータJJV高電力で発
熱させる。
In other words, the temperature of the heated object 11 (=correspondingly, if one of the temperature switches 23a and 23b is closed, and if the temperature switch 23m is closed, the voltage set by the high power setting device 24a is set by the power controller The power controller 22 sets the phase of the pulse signal by the voltage value (-) supplied by the control circuit 2, and sends the phase-set gate pulse signal to the triac 20. Then, the heater circuit 19v is switched in accordance with the gate pulse signal supplied by the triac 20, and the alternating current tM flowing through the heater circuit]9 is controlled every half cycle (two energization phase is controlled), and the heater JJV generates heat with high power.

また、温度スイッチ23bが閉じているときは低電力設
定器24bで設定されている電圧が電力制御器22に入
力し、トライアック20の通電位相を遅らせてヒータ回
路191:流れる電流量を制御し、ヒータ14v低電力
で発熱させ、低出力で被加熱体11を加熱する。
When the temperature switch 23b is closed, the voltage set by the low power setting device 24b is input to the power controller 22, and the energization phase of the triac 20 is delayed to control the amount of current flowing through the heater circuit 191. The heater 14v generates heat with low power and heats the object to be heated 11 with low power.

第3図は上記ヒータ制御装置15を用いたヒートトレス
12を作動したときの被加熱体の温度変化を示したもの
で、周囲温度が最低Aの時。
FIG. 3 shows the temperature change of the heated object when the heat tress 12 using the heater control device 15 is operated, when the ambient temperature is the lowest A.

上記ヒータ制御装置15の電源スィッチ17を閉じると
、温度スイッチ23aが閉、温度スイッチ23bが開と
なっているので高電力W)がヒータ14(=供給されて
被加熱体11′4/加熱していく。この被加熱体1)の
温度は一定温度維持に必要十分な熱量が与えられている
ので制御範囲内で平衡状態となる。また7周囲温度が最
高Bの時には最高Aの時と同様に高電力W1で被加熱体
11を加熱していくが、必要以上C二過大な熱量を与え
ること(二なり、制御範囲の上限値r1+Hを越えてし
まう。しかし、上限値+11Hを越えた直後C二温変ス
イッチ23日が開き、温度スイッチ23bが閉じるので
、低電力W2がヒータ14に供給されて低出力で被加熱
体11を加熱する。その後、被加熱体11の温度は周囲
温度最高時に対する必要十分な熱量が与えられているの
で、結局初期状態より供給される熱量が減少することか
ら温度が下がり、制御範囲内で平衡状態となる。また1
周囲温度が最低時と最高時の中間C1二ある場合(−は
、初めに高電力W1で加熱していくがやはり過大な熱量
を与えているので被加熱体11の温度は制御範囲の上限
値THに達する。ここで温度スイッチ23日が開き、温
度スイッチ23bが閉じて低電力W2がヒーメ牝供給さ
れるので供給熱量が減少して温度が下がる。しかし、こ
の供給熱量は周囲温度最高時に設定されたものなので温
度維持i二は不足であり、制御範囲の下限値TLを越え
てしまう。しかし、下限値TLを越えた直後に温度スイ
ッチ23aが閉じて温度スイッチ23hが開くので高電
力W1をヒータ14I=供給するようになり、過大熱量
を被加熱に与える。そして上記動作を繰り返して制御範
囲内で被加熱−仏温度維持を行なうようになる。
When the power switch 17 of the heater control device 15 is closed, the temperature switch 23a is closed and the temperature switch 23b is open, so high power W) is supplied to the heater 14 (= object to be heated 11'4/heated). The temperature of the object to be heated 1) is in an equilibrium state within the control range since sufficient heat is given to maintain a constant temperature. In addition, when the ambient temperature is the maximum B, the heated object 11 is heated with high power W1 in the same way as when the ambient temperature is the maximum A, but an excessive amount of heat C2 is applied more than necessary (2, the upper limit of the control range). r1+H is exceeded. However, immediately after the upper limit +11H is exceeded, the C two-temperature change switch 23 opens and the temperature switch 23b closes, so low power W2 is supplied to the heater 14 and the heated object 11 is heated at low output. After that, the temperature of the heated object 11 is given the necessary and sufficient amount of heat for the maximum ambient temperature, so the amount of heat supplied decreases from the initial state, so the temperature decreases and reaches an equilibrium within the control range. The state becomes 1 again.
When the ambient temperature is between the lowest and highest ambient temperature C1 (-, the temperature of the heated object 11 is the upper limit of the control range because it is first heated with high power W1, but it still gives an excessive amount of heat) TH is reached.At this point, the temperature switch 23 is opened, the temperature switch 23b is closed, and low power W2 is supplied to the heater, so the amount of heat supplied decreases and the temperature drops.However, this amount of heat supplied is set when the ambient temperature is at its highest. Therefore, the temperature maintenance i2 is insufficient and the lower limit value TL of the control range is exceeded.However, immediately after the lower limit value TL is exceeded, the temperature switch 23a closes and the temperature switch 23h opens, so the high power W1 is The heater 14I is supplied with an excessive amount of heat to the heated object.The above operation is then repeated to maintain the temperature of the heated object within the control range.

したがって、周囲温度が最低又は最高のときには被加熱
体11の温度維持に必要十分な高電力W1又はW2をヒ
ータ14に供給するので、ヒータ14は連続して加熱す
るようになり、また最低時と最高時の中間にある場合で
も関電力W1と低電力W2の切り換えによって常にヒー
タ14に電力を供給しているので、従来の゛嘔源の接断
繰り返しと比較してヒータ14の寿命は飛躍的1=延び
る。またヒータ14が連続して加熱することから、被加
熱体11の熱疲労による損傷を防止することができる。
Therefore, when the ambient temperature is the lowest or highest, high power W1 or W2 necessary and sufficient to maintain the temperature of the heated object 11 is supplied to the heater 14, so that the heater 14 is heated continuously; Since power is always supplied to the heater 14 by switching between the high power W1 and the low power W2 even when it is in the middle of the maximum power, the life of the heater 14 is dramatically extended compared to the conventional method of repeatedly disconnecting and disconnecting the source. 1=extends. Furthermore, since the heater 14 continuously heats the object 11 to be heated, damage caused by thermal fatigue can be prevented.

以上のよう(二この発明I:よれば、ヒータ制御装置を
上限温度以上で開く温度スイッチと高電力設定器、及び
上限温度以上で閉じる温度スイッチと低電力設定器を並
列に配置して電力制御器へ接続すること1二より、ヒー
タへ供給される電力が連続するためヒータの寿命な飛曜
的に延ばし、これ(一対応して連続加熱するので被加熱
体の熱疲労C二よる損傷を防止することができる。
As described above (2) According to this invention I, power is controlled by arranging in parallel a temperature switch and a high power setter that open the heater control device at a temperature higher than the upper limit temperature, and a temperature switch and a low power setter that close the heater control device at a temperature higher than the upper limit temperature. 1) Connecting the heater to the heater continuously extends the life of the heater as power is continuously supplied to the heater. It can be prevented.

さらに、市販の安価な電力制御器と温度スイッチにより
適正なヒータ出力が得られ、被加熱体に対して適切な熱
量を与えることが可能であり。
Furthermore, an appropriate heater output can be obtained using a commercially available inexpensive power controller and temperature switch, making it possible to provide an appropriate amount of heat to the heated object.

ヒータ自体も長期安定状態で使用できる。The heater itself can also be used in a long-term stable state.

この発明は実施例に挙げた機器や配管等のヒートトレス
システムの他(二機器、配管の凍結防止装置やタンク等
の液体加熱用システム等にも利用可能である。
In addition to the heat tress systems for equipment and piping mentioned in the embodiments, the present invention can also be used for equipment, anti-freezing equipment for piping, systems for heating liquids such as tanks, etc.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は機器や配管等の電気式ヒートトレスの構成を説
明する図、第2図はこの発明の一実施例に係るヒータ制
御装置の構成を説明する図。 第3図は上記ヒータ制御装置を用いたヒートトレスを作
動したときの被加熱体の温度曲線を示した因である。 11・・−被加熱体、12・・・ヒートトレス、13・
・・電源回路、14・・・ヒータ、15・−・ヒータ制
御装置、16・・・入力端子、12°”電源スィッチ。 18・・・出力端子、19・・・ヒータ回路、20・・
・トライアック、21・・・制御回路、22・・・電力
制御器、23a・・・上限温度以上で開き、下限値以下
で閉じる温度スイッチ、23b・・・上限温度以上で閉
じ、下限値以下で開く温□□□スイッチ、 21ta・
・・高電力設定器、24b・・・低電力設定器、A・・
・周囲温度最低時の被加熱体の温度曲線、B・・・周囲
温度最高時の温度曲線、C・・・周囲温度が最高と最低
の中間にあるときの温度曲線、W)・・・高電力、W2
・・・低電力。
FIG. 1 is a diagram illustrating the configuration of an electric heat stress such as equipment and piping, and FIG. 2 is a diagram illustrating the configuration of a heater control device according to an embodiment of the present invention. FIG. 3 shows the temperature curve of the object to be heated when the heat tress using the heater control device described above is operated. 11...-Heated object, 12... Heat tress, 13...
... Power supply circuit, 14... Heater, 15... Heater control device, 16... Input terminal, 12°" power switch. 18... Output terminal, 19... Heater circuit, 20...
- Triac, 21... Control circuit, 22... Power controller, 23a... Temperature switch that opens above the upper limit temperature and closes below the lower limit value, 23b... Closes above the upper limit temperature and below the lower limit value. Open warm□□□ switch, 21ta・
...High power setting device, 24b...Low power setting device, A...
・Temperature curve of the heated object at the lowest ambient temperature, B...Temperature curve at the highest ambient temperature, C...Temperature curve when the ambient temperature is between the highest and lowest, W)...High Electric power, W2
...low power.

Claims (1)

【特許請求の範囲】[Claims] 上限温度以上で開く温度スイッチと高電力設定器、及び
上限温度以上で閉じる温度スイッチと低電力設定器を並
列に配置して電力制御器へ接続しているヒータ制御装置
A heater control device in which a temperature switch and a high power setting device that open when the temperature exceeds the upper limit temperature, and a temperature switch and a low power setting device that closes when the temperature exceeds the upper limit are arranged in parallel and connected to a power controller.
JP57123669A 1982-07-15 1982-07-15 Controller of heater Pending JPS5914019A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57123669A JPS5914019A (en) 1982-07-15 1982-07-15 Controller of heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57123669A JPS5914019A (en) 1982-07-15 1982-07-15 Controller of heater

Publications (1)

Publication Number Publication Date
JPS5914019A true JPS5914019A (en) 1984-01-24

Family

ID=14866361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57123669A Pending JPS5914019A (en) 1982-07-15 1982-07-15 Controller of heater

Country Status (1)

Country Link
JP (1) JPS5914019A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0637292U (en) * 1992-10-27 1994-05-17 株式会社豊田自動織機製作所 Forklift split type clamp device
US6706502B2 (en) 2000-10-12 2004-03-16 Goldschmidt Ag Enzymatic preparation of hydroxy fatty acid esters of polyhydric alcohols which are solid at room temperature
JP2016129116A (en) * 2015-01-09 2016-07-14 有限会社フィンテック Hot air heater control system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4428571Y1 (en) * 1966-06-30 1969-11-27

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4428571Y1 (en) * 1966-06-30 1969-11-27

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0637292U (en) * 1992-10-27 1994-05-17 株式会社豊田自動織機製作所 Forklift split type clamp device
US6706502B2 (en) 2000-10-12 2004-03-16 Goldschmidt Ag Enzymatic preparation of hydroxy fatty acid esters of polyhydric alcohols which are solid at room temperature
JP2016129116A (en) * 2015-01-09 2016-07-14 有限会社フィンテック Hot air heater control system

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