JPH1078824A - Fluid temperature controller and method therefor - Google Patents

Fluid temperature controller and method therefor

Info

Publication number
JPH1078824A
JPH1078824A JP23166496A JP23166496A JPH1078824A JP H1078824 A JPH1078824 A JP H1078824A JP 23166496 A JP23166496 A JP 23166496A JP 23166496 A JP23166496 A JP 23166496A JP H1078824 A JPH1078824 A JP H1078824A
Authority
JP
Japan
Prior art keywords
fluid
temperature
peltier element
container
cooling
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
Application number
JP23166496A
Other languages
Japanese (ja)
Other versions
JP3683655B2 (en
Inventor
Kazunari Ozawa
一成 小澤
Tomohide Uchida
友秀 内田
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.)
TENRYU TECHNIC KK
Original Assignee
TENRYU TECHNIC KK
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 TENRYU TECHNIC KK filed Critical TENRYU TECHNIC KK
Priority to JP23166496A priority Critical patent/JP3683655B2/en
Publication of JPH1078824A publication Critical patent/JPH1078824A/en
Application granted granted Critical
Publication of JP3683655B2 publication Critical patent/JP3683655B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Control Of Temperature (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a fluid temperature controller and the method for always maintaining the temperature of fluid to be supplied in a stable state regardless of the temperature of a factory, etc., where the fluid is processed. SOLUTION: This device is provided with a Peltier element 2 for heating or cooling liquid (b) housed in a case 1, and a first detecting means 3 for detecting the temperature is linked with the liquid (b) or the case 1. Also, a controlling means 4 for operating the switching control of the power source polarity of the heating and cooling of the Peltier element 2 based on preliminarily decided data is linked with the Peltier element 2 and the first detecting means 3.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、流体の温度をあらかじ
め定められたデータ通りに維持することができる流体温
度制御装置およびその方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid temperature control apparatus and method capable of maintaining the temperature of a fluid in accordance with predetermined data.

【0002】[0002]

【従来の技術】電子部品の組立や装着を行なう業界にあ
って、その基板上の配線パターンおよび基準パターンの
上に接合媒体、例えば、ハンダや接着剤等を塗布する際
には、あらかじめ冷温保存されていた接合媒体は、塗布
最適温度にするために加熱した後行なわれる。
2. Description of the Related Art In the industry of assembling and mounting electronic parts, when applying a bonding medium, for example, solder or an adhesive, onto a wiring pattern and a reference pattern on a substrate thereof, a preservation of cold temperature is required. The bonding medium, which has been used, is heated and heated to an optimum temperature for application.

【0003】そして、この接合媒体の温度は、その媒体
の性状や塗布条件に合わせて適宜制御し、その粘性を一
定化させている。
[0003] The temperature of the joining medium is appropriately controlled in accordance with the properties of the medium and the application conditions to make the viscosity constant.

【0004】これにより、供給する接合媒体の塗布量が
均一になったり、供給されたその塗布形状が安定した
り、あるいは、円滑な供給がなされることで塗布時間が
短縮される等の利点がある。
[0004] As a result, there are advantages in that the applied amount of the bonding medium to be supplied becomes uniform, the applied shape of the applied coating medium is stabilized, or the coating time is shortened by smooth supply. is there.

【0005】そして、従来のこの装置は、図2に示すよ
うなものが知られており、容器50に入った接合媒体5
1の加熱には、一般的にシリコンラバーヒータ52が使
用され、温度センサー53と接続させたコントローラ5
4によって、該ヒータ52を制御して希望する設定温度
に維持させる。
[0005] As this conventional apparatus, the one shown in FIG.
In general, a silicon rubber heater 52 is used to heat the controller 1 and a controller 5 connected to a temperature sensor 53.
4 controls the heater 52 to maintain the desired set temperature.

【0006】しかしながら、電子部品の組立や装着作業
を行なう工場,室内が空調管理されている場合や、一般
的な接着剤,ハンダ等の接合媒体の使用においては、接
合媒体に対してヒータによる加熱を与えるのみでよい
が、35℃以上の工場や室内においての作業や、特殊な
接合媒体を使用する場合には、接合媒体に対して冷却を
施す必要とすることがあるもので、特に、外気(室内)
温度が設定値より高いときは、これに伴って接合媒体の
温度も高くなるため、該接合媒体温度を下げるために冷
却しなければならない。
[0006] However, when air-conditioning is controlled in a factory or a room where electronic components are assembled and mounted, or when a bonding medium such as a general adhesive or solder is used, the bonding medium is heated by a heater. However, when working in a factory or room above 35 ° C. or using a special bonding medium, the bonding medium may need to be cooled. (Indoor)
When the temperature is higher than the set value, the temperature of the bonding medium also increases accordingly, so that cooling must be performed to lower the temperature of the bonding medium.

【0007】この場合、塗布装置全体を冷却する方法
や、塗布装置に収容された接合媒体を冷却する方法等が
採用されるものであるが、いずれの場合においても、冷
却装置が必要となるもので、しかもこのものは、装置が
大型となって大きな設置スペースを要すると共に、高価
となって、低廉価の製品の提供が行なえない。等の様々
な問題点を有するものであった。
In this case, a method of cooling the entire coating apparatus, a method of cooling the bonding medium accommodated in the coating apparatus, and the like are adopted. In any case, a cooling apparatus is required. In addition, this device requires a large installation space due to the large size of the device, and is expensive, so that a low-priced product cannot be provided. And other various problems.

【0008】[0008]

【発明が解決しようとする課題】本発明は前記した問題
点を解決するためになされたもので、容体に収容した流
体に加熱または冷却を与えるペルチェ素子を設け、この
流体または容体にその温度を検出する第一検出手段を連
係させると共に、ペルチェ素子と第一検出手段とに、あ
らかじめ定められたデータに基づいてペルチェ素子の加
熱・冷却の電源極性を切換制御する制御手段を連係させ
ることにより、供給しようとする流体の温度を、流体が
処理される工場等の雰囲気温度と関係なく、常に安定し
た状態に維持することができる流体温度制御装置および
その方法を提供することを目的としている。
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has a Peltier element for heating or cooling a fluid contained in a container. By linking the first detecting means to be detected, the Peltier element and the first detecting means, by linking control means for switching and controlling the power supply polarity of heating / cooling of the Peltier element based on predetermined data, It is an object of the present invention to provide a fluid temperature control device and a fluid temperature control device capable of constantly maintaining the temperature of a fluid to be supplied irrespective of the ambient temperature of a factory or the like where the fluid is processed.

【0009】[0009]

【課題を解決するための手段】前記した目的を達成する
ための本発明の手段は、流体を収容する容体と、この流
体に加熱または冷却を与えるペルチェ素子と、前記流体
または容体に連係させてその温度を検出する第一検出手
段と、前記ペルチェ素子と第一検出手段とに連係させ
て、あらかじめ定められたデータに基づいてペルチェ素
子の加熱・冷却の電源極性を切換制御する制御手段と、
を備えさせた流体温度制御装置の構成にある。
Means of the present invention for achieving the above object are a container for containing a fluid, a Peltier device for heating or cooling the fluid, and a device for associating with the fluid or the container. First detection means for detecting the temperature, control means for controlling the switching of the power supply polarity of heating and cooling of the Peltier element based on predetermined data in association with the Peltier element and the first detection means,
The fluid temperature control device is provided with:

【0010】また、流体を収容する容体と、この流体に
加熱または冷却を与えるペルチェ素子と、前記流体また
は容体に連係させてその温度を検出する第一検出手段
と、前記容体の外部に設けて外気温度を検出する第二検
出手段と、前記ペルチェ素子と第一検出手段と第二検出
手段とに連係させて、あらかじめ定められたデータに基
づいてペルチェ素子の加熱・冷却の電源極性を切換制御
する制御手段と、を備えさせた流体温度制御装置の構成
にある。
[0010] Also, a container for containing a fluid, a Peltier element for heating or cooling the fluid, first detecting means linked to the fluid or the container to detect the temperature, and provided outside the container. The second detection means for detecting the outside air temperature, the Peltier element, the first detection means, and the second detection means are linked to control the switching of the power supply polarity for heating / cooling the Peltier element based on predetermined data. And a control means for controlling the fluid temperature.

【0011】そして、容体内に流体を収容して、この流
体に加熱または冷却を与えるペルチェ素子を接続し、流
体またはこの容体に連係させた検出手段が、制御手段に
入力したあらかじめ定められた温度設定値より低い値を
検出したとき、前記ペルチェ素子の電源極性を切り換え
て流体を加熱する工程と、前記温度設定値より高い値を
検出したとき、前記ペルチェ素子の電源極性を切り換え
て流体を冷却する工程とを選択的に行なう流体温度制御
方法にある。
Then, a fluid is accommodated in the vessel, and a Peltier element for heating or cooling the fluid is connected to the fluid, and the detecting means associated with the fluid or the vessel receives a predetermined temperature inputted to the control means. A step of switching the power supply polarity of the Peltier element to heat the fluid when a value lower than the set value is detected, and a step of switching the power supply polarity of the Peltier element to cool the fluid when a value higher than the temperature set value is detected. And a fluid temperature control method for selectively performing the steps of:

【0012】[0012]

【実施例】次に、本発明に関する流体温度制御装置およ
びその方法の実施の一例を図面に基づいて説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a fluid temperature control apparatus and method according to the present invention will be described with reference to the drawings.

【0013】図1においてAは流体温度制御装置で、例
えば、電子部品の組立や装着等を行なう業界にあって、
その基板上の配線パターンおよび基準パターンの上に流
体である接合媒体b、例えば、ハンダや接着剤等の塗布
において、該接合媒体bを、塗布最適温度にするために
加熱した後、この接合媒体bを供給する装置cに採用さ
れるもので、容体1と、ペルチェ素子2と、第一検出手
段3と、制御手段4とにより基本的に構成される。
In FIG. 1, reference numeral A denotes a fluid temperature control device, for example, in the industry of assembling and mounting electronic parts.
In the application of a bonding medium b, which is a fluid, for example, a solder or an adhesive, on the wiring pattern and the reference pattern on the substrate, the bonding medium b is heated to an application optimum temperature, and then the bonding medium b is heated. This is adopted for the device c for supplying b, and is basically composed of the container 1, the Peltier element 2, the first detection means 3, and the control means 4.

【0014】前記した容体1は、ハンダや接着剤等の接
合媒体である流体bを収容するもので、上部に、該流体
bを送り出すための空圧源(図示せず)からの加圧空気
を圧送する送込部材5を取り付けた蓋体6を嵌着してあ
り、下部に、流体bを吐出するニードル7を備えてい
る。
The container 1 contains a fluid b which is a joining medium such as solder or adhesive, and has a pressurized air from a pneumatic source (not shown) for sending out the fluid b. And a needle 7 for discharging the fluid b is provided at the lower part.

【0015】また、この容体1は、ケース8内へ回転自
在に収容されていて、このニードル7は、流体bが塗布
される基板(図示せず)に対して上下動自在に取り付け
られている。
The container 1 is rotatably accommodated in a case 8, and the needle 7 is vertically movably attached to a substrate (not shown) to which the fluid b is applied. .

【0016】前記したペルチェ素子2は、ペルチェ効果
を利用して、流体bに対して加熱または冷却を与えるも
ので、ケース8の適所にその壁部を貫通するように埋設
してあって、一方端面2aを容体1側に対応させ、他方
端面2bをケース8における外方へ、すなわち、大気側
へ対応するように設けられる。
The above-mentioned Peltier element 2 applies heating or cooling to the fluid b by utilizing the Peltier effect, and is buried in an appropriate place of the case 8 so as to penetrate its wall. The end face 2a is provided so as to correspond to the container 1 side, and the other end face 2b is provided so as to face outward in the case 8, that is, toward the atmosphere.

【0017】このペルチェ素子2に電流を流すと、一方
端面2aに発熱が、他方端面2bに吸熱(冷却)が起こ
るもので、前記電流の向き(電源極性)を逆にすると、
発熱,吸熱(冷却)が逆になるものである。
When a current flows through the Peltier element 2, heat is generated on one end face 2a and heat is absorbed (cooled) on the other end face 2b. When the direction of the current (power supply polarity) is reversed,
Heat generation and heat absorption (cooling) are reversed.

【0018】また、このペルチェ素子2の外側には、加
熱・冷却時に生ずる結露の防止のために、被覆部材9,
9を付設してある。
Further, on the outside of the Peltier element 2, a covering member 9,
9 is attached.

【0019】更に、このペルチェ素子2における他方端
面2b側に、ファン等の送排気手段10を設けて、加熱
・冷却効果の向上を計ることもある。
Further, an air supply / exhaust means 10 such as a fan may be provided on the other end face 2b side of the Peltier element 2 to improve the heating / cooling effect.

【0020】前記した第一検出手段3は、流体bまたは
容体1に連係させてその温度を検出するもので、慣用の
温度センサーが利用できるものであって、ニードル7の
近傍に設けることが好ましいものであり、容体1内に設
置することもある。
The first detecting means 3 detects the temperature in association with the fluid b or the container 1, and can use a conventional temperature sensor, and is preferably provided near the needle 7. And may be installed in the container 1.

【0021】前記した制御手段4は、ペルチェ素子2と
第一検出手段3とに連係させて、あらかじめ定められた
データに基づいてペルチェ素子2の加熱・冷却の電源極
性を切換制御するもので、慣用のコンピュータが用いら
れる。
The control means 4 controls the polarity of the power supply for heating / cooling the Peltier element 2 based on predetermined data in association with the Peltier element 2 and the first detection means 3. A conventional computer is used.

【0022】また、この制御手段4には、容体1の外部
に設けて工場や室内の外気温度を検出する第二検出手段
11を接続してあって、第一検出手段3により検出され
た流体b温度とこの第二検出手段11により検出された
外気温度とを比較演算して、制御手段4に設定した流体
bの温度値より外気温度が上昇したときに、ペルチェ素
子2における電源極性を切り換えて容体1内の流体bを
冷却する。
The control means 4 is connected to a second detection means 11 which is provided outside the container 1 and detects the outside air temperature in a factory or a room. Comparing and calculating the temperature b and the outside air temperature detected by the second detection means 11, when the outside air temperature rises from the temperature value of the fluid b set in the control means 4, the power supply polarity in the Peltier element 2 is switched. To cool the fluid b in the container 1.

【0023】したがって、前述のように構成される本発
明に係る装置および方法の一実施例の作用は、以下の通
りである。
Accordingly, the operation of the embodiment of the apparatus and method according to the present invention configured as described above is as follows.

【0024】例えば、基板上に電子部品を実装する際に
は、ハンダ塗布や接着剤塗布がなされるもので、供給装
置cの容体1内には前記接合媒体bが収容されて、所定
の塗布粘性が得られるように該接合媒体bは、容体1ま
たは接合媒体bに連係させたペルチェ素子2により加熱
される。
For example, when electronic components are mounted on a substrate, solder application or adhesive application is performed. The bonding medium b is accommodated in the container 1 of the supply device c, and the predetermined application is performed. The joining medium b is heated by the Peltier element 2 linked to the container 1 or the joining medium b so as to obtain a viscosity.

【0025】このとき、ペルチェ素子2の一方端面2a
が加熱されるように制御手段4を介して電源極性を変え
ると共に、該制御手段4により電流制御を行なうこと
で、容体1内の接合媒体bは設定温度にあるいはその近
似温度となる。
At this time, one end face 2a of the Peltier element 2
By changing the polarity of the power supply via the control means 4 so as to heat the medium, and controlling the current by the control means 4, the bonding medium b in the container 1 becomes the set temperature or an approximate temperature thereof.

【0026】接合媒体bが過加熱されたときは、あるい
は、制御手段4に入力したあらかじめ定められた温度設
定値を越えたときは、第一検出手段3の信号により制御
手段4が働いて、ペルチェ素子2の電源極性が逆に変わ
り、接合媒体bを温度設定値まで冷却して所定温度に維
持する。
When the joining medium b is overheated or when the temperature exceeds a predetermined temperature set value inputted to the control means 4, the control means 4 operates according to the signal of the first detection means 3, and The polarity of the power supply of the Peltier element 2 is reversed, and the bonding medium b is cooled to the set temperature and maintained at the predetermined temperature.

【0027】こうして所定温度に加熱された接合媒体b
は、空圧源からの加圧空気により容体1のニードル7か
ら押し出されて基板上に供給される。
The bonding medium b thus heated to a predetermined temperature
Is pushed out from the needle 7 of the container 1 by pressurized air from the pneumatic source and supplied onto the substrate.

【0028】実装作業が終了した後は、ペルチェ素子2
の電源極性を、制御手段4を操作して逆に変えることに
より、一方端面2aは冷却されて容体1内に残った接合
媒体bが保存に適した低温に温度制御される。
After the mounting operation is completed, the Peltier device 2
Is changed by operating the control means 4, the temperature of the one end face 2a is controlled to a low temperature suitable for preserving the joining medium b remaining in the container 1 by cooling.

【0029】また、実装作業を行なう室内が、制御手段
4に入力した設定温度値より高くなったときは、ニード
ル7より供給される接合媒体bの粘性が変化して、塗布
量や塗布形状に悪影響を与えるものであるから、この外
気温度を第二検出手段11が検知して制御手段4へ送信
し、ペルチェ素子2の電源極性を逆に変えて、一方端面
2aが冷却されるように制御することで、接合媒体bは
温度設定値まで冷却されて所定温度に維持される。
When the temperature of the room in which the mounting operation is performed becomes higher than the set temperature value inputted to the control means 4, the viscosity of the bonding medium b supplied from the needle 7 changes, and the application amount and the application shape are changed. Since this has an adverse effect, the outside air temperature is detected by the second detection means 11 and transmitted to the control means 4 to control the polarity of the power supply of the Peltier element 2 in reverse so that the one end face 2a is cooled. By doing so, the bonding medium b is cooled to the temperature set value and is maintained at the predetermined temperature.

【0030】このように、制御手段4の信号に基づい
て、ペルチェ素子2の電源極性を切り換えて流体を加熱
する工程と、流体を冷却する工程とを選択的に行なうこ
とで、接合媒体bの最適な塗布状態の温度が得られる。
As described above, the step of heating the fluid by switching the polarity of the power supply of the Peltier element 2 and the step of cooling the fluid are selectively performed based on the signal of the control means 4 so that the bonding medium b An optimum coating temperature is obtained.

【0031】また、流体bの異なる特性のものや、塗布
粘性の異なる流体bに対しても本実施例は有効である。
The present embodiment is also effective for a fluid b having different characteristics and a fluid b having a different application viscosity.

【0032】なお、本実施例においては、流体bに接合
媒体を用いたが、各種産業において温度制御が必要な気
体や粒体、粉体、あるいは、粘性の異なる物質等の流動
性のあるものが利用できることはもちろんである。
In this embodiment, the joining medium is used as the fluid b. However, fluids such as gases, granules, powders, or substances having different viscosities that require temperature control in various industries are used. Is of course available.

【0033】[0033]

【発明の効果】前述したように本発明の流体温度制御装
置およびその方法は、ペルチェ素子の電源の極性を切り
換えることにより、一つのペルチェ素子により流体を簡
単に加熱,冷却制御ができて、しかも、装置全体の小型
化が計れ、シンプルな構造となる格別な効果を奏するも
のである。
As described above, the fluid temperature control apparatus and method according to the present invention can easily control the heating and cooling of a fluid by one Peltier element by switching the polarity of the power supply of the Peltier element. In addition, the size of the entire apparatus can be reduced, and a special structure having a simple structure can be obtained.

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

【図1】本発明に関する流体温度制御装置の一実施例の
概略を示す説明図である。
FIG. 1 is an explanatory view schematically showing an embodiment of a fluid temperature control device according to the present invention.

【図2】従来の装置を示す説明図である。FIG. 2 is an explanatory view showing a conventional device.

【符号の説明】[Explanation of symbols]

b 流体 1 容体 2 ペルチェ素子 3 第一検出手段 4 制御手段 11 第二検出手段 b fluid 1 container 2 Peltier element 3 first detecting means 4 control means 11 second detecting means

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 流体を収容する容体と、この流体に加熱
または冷却を与えるペルチェ素子と、前記流体または容
体に連係させてその温度を検出する第一検出手段と、前
記ペルチェ素子と第一検出手段とに連係させて、あらか
じめ定められたデータに基づいてペルチェ素子の加熱・
冷却の電源極性を切換制御する制御手段とを備えさせた
ことを特徴とする流体温度制御装置。
1. A container for containing a fluid, a Peltier device for heating or cooling the fluid, first detecting means for detecting the temperature of the fluid or the container in association with the fluid or the container, and the Peltier device and the first detection. In connection with the means, the heating and heating of the Peltier element based on predetermined data
And a control means for switching and controlling the polarity of the power supply for cooling.
【請求項2】 流体を収容する容体と、この流体に加熱
または冷却を与えるペルチェ素子と、前記流体または容
体に連係させてその温度を検出する第一検出手段と、前
記容体の外部に設けて外気温度を検出する第二検出手段
と、前記ペルチェ素子と第一検出手段と第二検出手段と
に連係させて、あらかじめ定められたデータに基づいて
ペルチェ素子の加熱・冷却の電源極性を切換制御する制
御手段とを備えさせたことを特徴とする流体温度制御装
置。
2. A container for accommodating a fluid, a Peltier element for applying heat or cooling to the fluid, first detecting means for detecting a temperature of the fluid or the container in association with the fluid or the container, and provided outside the container. The second detection means for detecting the outside air temperature, the Peltier element, the first detection means, and the second detection means are linked to control the switching of the power supply polarity for heating / cooling the Peltier element based on predetermined data. And a control means for controlling the temperature of the fluid.
【請求項3】 容体内に流体を収容して、この流体に加
熱または冷却を与えるペルチェ素子を接続し、流体また
はこの容体に連係させた検出手段が、制御手段に入力し
たあらかじめ定められた温度設定値より低い値を検出し
たとき、前記ペルチェ素子の電源極性を切り換えて流体
を加熱する工程と、前記温度設定値より高い値を検出し
たとき、前記ペルチェ素子の電源極性を切り換えて流体
を冷却する工程とを選択的に行なうことを特徴とする流
体温度制御方法。
3. A Peltier element for containing a fluid in a vessel and applying heating or cooling to the fluid is connected, and a detecting means associated with the fluid or the vessel receives a predetermined temperature inputted to the control means. A step of switching the power supply polarity of the Peltier element to heat the fluid when a value lower than the set value is detected, and a step of switching the power supply polarity of the Peltier element to cool the fluid when a value higher than the temperature set value is detected. A fluid temperature control method characterized by selectively performing the steps of:
JP23166496A 1996-09-02 1996-09-02 Bonding medium application device Expired - Fee Related JP3683655B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23166496A JP3683655B2 (en) 1996-09-02 1996-09-02 Bonding medium application device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23166496A JP3683655B2 (en) 1996-09-02 1996-09-02 Bonding medium application device

Publications (2)

Publication Number Publication Date
JPH1078824A true JPH1078824A (en) 1998-03-24
JP3683655B2 JP3683655B2 (en) 2005-08-17

Family

ID=16927054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23166496A Expired - Fee Related JP3683655B2 (en) 1996-09-02 1996-09-02 Bonding medium application device

Country Status (1)

Country Link
JP (1) JP3683655B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101314754B1 (en) * 2011-09-30 2013-10-08 (주) 이이시스 Power device for changing polarity of output voltage for application to chiller equipment and the method of controlling the power device
CN110914676A (en) * 2017-07-06 2020-03-24 M-I有限公司 Automated analysis of drilling fluids
CN113423560A (en) * 2019-02-15 2021-09-21 塞林克公司 System and method for controlled dispensing of temperature sensitive fluids in liquid handling and dispensing systems
US11643898B2 (en) 2018-10-17 2023-05-09 Schlumberger Technology Corporation Systems and methods for monitoring and/or predicting sagging tendencies of fluids

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101314754B1 (en) * 2011-09-30 2013-10-08 (주) 이이시스 Power device for changing polarity of output voltage for application to chiller equipment and the method of controlling the power device
CN110914676A (en) * 2017-07-06 2020-03-24 M-I有限公司 Automated analysis of drilling fluids
US11643898B2 (en) 2018-10-17 2023-05-09 Schlumberger Technology Corporation Systems and methods for monitoring and/or predicting sagging tendencies of fluids
CN113423560A (en) * 2019-02-15 2021-09-21 塞林克公司 System and method for controlled dispensing of temperature sensitive fluids in liquid handling and dispensing systems

Also Published As

Publication number Publication date
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