JPH0317121B2 - - Google Patents
Info
- Publication number
- JPH0317121B2 JPH0317121B2 JP16086783A JP16086783A JPH0317121B2 JP H0317121 B2 JPH0317121 B2 JP H0317121B2 JP 16086783 A JP16086783 A JP 16086783A JP 16086783 A JP16086783 A JP 16086783A JP H0317121 B2 JPH0317121 B2 JP H0317121B2
- Authority
- JP
- Japan
- Prior art keywords
- door
- heater
- storage room
- temperature
- outer door
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 description 8
- 238000009833 condensation Methods 0.000 description 8
- 230000020169 heat generation Effects 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
- G05D23/2451—Details of the regulator
- G05D23/2454—Details of the regulator using photoelectric elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Devices For Use In Laboratory Experiments (AREA)
- Control Of Temperature (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明は培養等の理化学実験に用いられる恒温
庫に関するものである。[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a thermostatic chamber used for physical and chemical experiments such as culture.
(ロ) 従来技術
此種恒温庫１を第１図に示す。２は前方に開口
せる断熱箱体で、内部の貯蔵室３の内壁に沿つて
貯水層４が形成されている。５は貯蔵室３加熱用
のヒーターであり、図示しない制御装置によつて
発熱を制御される。ここで貯蔵室３は貯水層４を
介してヒーター５に一様に斑無く加熱される。６
は貯蔵室３の開口を閉塞する様に一側に回動自在
に枢支された内扉であり、７は内面周縁に断熱箱
体２の開口周縁に密着するガスケツト８を有した
断熱性の外扉であり、内扉６の外側に於いて一側
を回動自在に枢支されて設けられる。(b) Prior art This type of constant temperature chamber 1 is shown in FIG. Reference numeral 2 denotes a heat insulating box body which opens at the front, and a water storage layer 4 is formed along the inner wall of a storage chamber 3 inside. 5 is a heater for heating the storage chamber 3, and its heat generation is controlled by a control device (not shown). Here, the storage chamber 3 is heated uniformly and without unevenness by the heater 5 via the water storage layer 4. 6
7 is an inner door rotatably supported on one side so as to close the opening of the storage chamber 3, and 7 is an insulating door having a gasket 8 on its inner periphery that is in close contact with the opening periphery of the insulating box 2. This is an outer door, and is provided on the outside of the inner door 6 so as to be rotatably supported on one side.
貯蔵室３内は図示しない制御装置によつてヒー
ター５を制御され、所定の恒温度、恒湿度とされ
るが、貯蔵室３温度と内扉６の温度の差によつて
内扉６内面に結露を生じる事があり、細菌等の培
養に支障を来たす。その為、外扉７には、その内
面に熱伝導的に扉ヒーター９を設けて、この扉ヒ
ーター９の発熱によつて内扉６を加熱して前述の
結露を防止している。 A heater 5 is controlled by a control device (not shown) in the storage room 3 to maintain a predetermined constant temperature and humidity, but due to the difference between the temperature of the storage room 3 and the temperature of the inner door 6, a Condensation may occur, which may interfere with the cultivation of bacteria, etc. Therefore, a door heater 9 is provided on the inner surface of the outer door 7 for heat conduction, and the heat generated by the door heater 9 heats the inner door 6 to prevent the aforementioned dew condensation.
この扉ヒーター９の発熱量は大過ぎれば貯蔵室
３内温度制御に悪影響を及ぼし、又、少なければ
内扉６内面に結露が生じてしまう為に従来では格
別な制御装置によつて適当な発熱量となる様に制
御していた。 If the amount of heat generated by this door heater 9 is too large, it will adversely affect the temperature control inside the storage room 3, and if it is too small, condensation will occur on the inner surface of the inner door 6. The amount was controlled.
(ハ) 発明の目的
本発明は恒温庫に於いて外扉と貯蔵室内との間
に熱の移動を無くすれば内扉内面の結露を防止出
来る点に着目して、該条件を満す様に、貯蔵室内
加熱用のヒーターと扉ヒーターの単位時間当りの
発熱量を選択して両ヒーターを単一の制御装置に
制御する恒温庫を提供する事にある。(c) Purpose of the Invention The present invention focuses on the fact that dew condensation on the inner surface of the inner door can be prevented by eliminating heat transfer between the outer door and the storage chamber in a constant-temperature warehouse, and provides a method to satisfy this condition. Another object of the present invention is to provide a constant temperature warehouse in which a single control device controls both heaters by selecting the amount of heat generated per unit time of a heater for heating the storage room and a door heater.
(ニ) 発明の構成
本発明は断熱箱体とその開口を閉塞する内扉と
内扉外側で前記開口を閉塞する断熱外扉を有し、
所定の恒温度を作る様に成した恒温庫に於いて、
貯蔵室内加熱用のヒーターと外扉内面を加熱する
扉ヒーターとを設け、貯蔵室内加熱用のヒーター
の単位時間当りの発熱量に対する扉ヒーターの単
位時間当りの発熱量の比率を貯蔵室内空気と周囲
空気との熱貫流係数に対する外扉と周囲空気との
熱貫流係数の比率に略一致せしめたものである。(d) Structure of the Invention The present invention includes a heat insulating box, an inner door that closes the opening, and an outer heat insulating door that closes the opening on the outside of the inner door.
In a constant temperature warehouse designed to maintain a predetermined constant temperature,
A heater for heating the storage interior and a door heater that heats the inner surface of the outer door are installed, and the ratio of the calorific value per unit time of the door heater to the calorific value per unit time of the heater for heating the storage interior is calculated based on the ratio of the heat generation amount per unit time to the air in the storage room and the surroundings. The ratio of the coefficient of heat transmission between the outer door and the surrounding air to the coefficient of heat transmission between the outer door and the surrounding air is made approximately equal to the coefficient of heat transmission between the outer door and the surrounding air.
(ホ) 実施例
実施例としては第１図の恒温庫１を用いる。こ
こでヒーター５の単位時間当りの発熱量をQr
（kcal／ｈ）、扉ヒーター９の単位時間当りの発熱
量をQD（kcal／ｈ）、貯蔵室３内温度をTr（℃）、
恒温庫１の設置されている周囲の温度をTO（℃）、
外扉７内面の温度をTDO（℃）、内扉６内面の温度
をTDI（℃）、貯蔵室３内空気と周囲空気との熱貫
流係数をKrAr（kcal／ｈ℃）、外扉７内面と周囲
空気との熱貫流係数をKDOADO（kcal／ｈ℃）、内
扉６内面と貯蔵室３内空気との熱貫流係数をKDr
ADr（kcal／ｈ℃）、内扉６内面と外扉７内面との
熱貫流係数をKDrADr（kcal／ｈ℃）、外扉７内面
と貯蔵室３の間の単位時間当りの移動熱量をQDr
（kcal／ｈ）とすると熱平衡状態では下式が成立
する。(e) Example As an example, the constant temperature chamber 1 shown in FIG. 1 is used. Here, the amount of heat generated per unit time of heater 5 is Q r
(kcal/h), the calorific value of the door heater 9 per unit time is Q D (kcal/h), the temperature inside the storage room 3 is T r (°C),
The temperature of the surrounding area where constant temperature warehouse 1 is installed is T O (℃),
The temperature on the inner surface of outer door 7 is T DO (℃), the temperature on the inner surface of inner door 6 is T DI (℃), and the heat transfer coefficient between the air inside storage room 3 and the surrounding air is K r A r (kcal/h℃). , the heat transfer coefficient between the inner surface of the outer door 7 and the surrounding air is K DO A DO (kcal/h℃), and the heat transfer coefficient between the inner surface of the inner door 6 and the air inside the storage room 3 is K Dr
A Dr (kcal/h℃), the heat transfer coefficient between the inner surface of the inner door 6 and the inner surface of the outer door 7 is K Dr A Dr (kcal/h℃), the coefficient of heat transfer per unit time between the inner surface of the outer door 7 and the storage room 3. Q Dr
(kcal/h), the following formula holds true in a state of thermal equilibrium.
Qr＋QDr＝KrAr（Tr−Tp） ……
QD−QDr＝KDOADO（TDO−TO） ……
QDrKDIADI（TDO−TDI） ……
QDr＝KDrADr（TDI−Tr ……
QDr＝KDIADI・KDrADr（TDO−Tr）
（KDrADr＋KDIADI） ……
ここで貯蔵室３内に熱影響を与える事なく、且
つ内扉６内面に結露を生じる事が無い為の条件は
内扉６内面の温度が貯蔵室３内温度と一致する事
であり、この時外扉７の内面の温度も貯蔵室３内
温度に一致し、又、外扉７内面と貯蔵室３の間の
単位時間当りの移動熱量を無くなるから下式が成
立する。 Q r +Q Dr =K r A r (T r −T p ) ... Q D −Q Dr = K DO A DO (T DO −T O ) ... Q Dr K DI A DI (T DO −T DI ) ... Q Dr = K Dr A Dr (T DI −T r ... Q Dr = K DI A DI・K Dr A Dr (T DO −T r ) (K Dr A Dr +K DI A DI ) ... Here The condition for not having a thermal effect on the interior of the storage room 3 and preventing dew condensation from forming on the inner surface of the inner door 6 is that the temperature on the inner surface of the inner door 6 matches the temperature inside the storage room 3. The temperature of the inner surface of the door 7 also matches the temperature inside the storage chamber 3, and since the amount of heat transferred per unit time between the inner surface of the outer door 7 and the storage chamber 3 is eliminated, the following equation holds true.
TDr＝Tr …… TDO＝Tr …… QDr＝Ｏ …… 以上の式乃至より下式が成立する。 T Dr = T r ... T DO = T r ... Q Dr = O ... From the above equations, the following equations hold true.
Qr／KrAr＝QD／KDOADO ……
即ち、
KDOADO／KrAr＝QD／Qr ……
となり、従つて貯蔵室３内空気と周囲空気との熱
貫流係数KrArと外扉７と周囲空気との熱貫流係
数KDOADOとを測定しておき、扉ヒーター９の単
位時間当り発熱量QDのヒーター５の単位時間当
りの発熱量Qrに対する比率がKrArに対するKDO
ADOの比率と一致する様な扉ヒーター９及びヒー
ター５を選択すれば単一の制御装置によつて内扉
６内面の結露を防止出来る。 Q r /K r A r = Q D /K DO A DO ... That is, K DO A DO /K r A r = Q D /Q r ... Therefore, the difference between the air inside the storage room 3 and the surrounding air is Measure the heat transmission coefficient K r A r and the heat transmission coefficient K DO A DO between the outer door 7 and the surrounding air, and calculate the heat generation per unit time of the heater 5 with the heat generation amount Q D of the door heater 9 per unit time. The ratio to the quantity Q r is K r A r to K DO
By selecting the door heater 9 and heater 5 that match the ratio of A DO , dew condensation on the inner surface of the inner door 6 can be prevented with a single control device.
第２図は恒温庫１の温度制御回路１０の実施例
を示している。ACは交流電源であり、双方向性
三端子サイリスタ１１と直列にヒーター５及び扉
ヒーター９の並列回路が接続されている。１２は
双方向性三端子サイリスタ１１のゲートトリガ回
路を構成する整流回路であり、１３ａは整流回路
１２の通電を制御するフオトサイリスタカブラ１
３のサイリスタである。１４は制御回路であり、
貯蔵室３内の温度を検出する温度検出素子１５の
検出動作に基づき所望の恒温度となる様にフオト
サイリスタカブラ１３を制御する。フオトサイリ
スタカブラ１３は制御回路１４の出力に持続され
制御回路１４の出力が高電位（以下「Ｈ」と称
す。）の時にサイリスタ１３ａが導通し、低電位
（以下「Ｌ」と称す。）の時にサイリスタ１３ａは
不導通である。サイリスタ１３ａが導通すれば双
方向性三端子サイリスタ１１がトリガされて導通
し、ヒーター５及び扉ヒーター９に通電し両ヒー
ター５，９を発熱せしめる。即ち制御回路１４は
その時点の貯蔵室３内温度によつて出力が「Ｈ」
となる時間を変化せしめ、結果的に両ヒーター
５，９の発熱量を増減して貯蔵室３内を所望の恒
温度に保つ様動作する。制御回路１４はＰ制御
（比例制御）或いはPI制御（比例積分制御）動作
により、設定温度と貯蔵室３内温度との差を無く
す様、即ち両者が常に一値する様に動作するもの
である。 FIG. 2 shows an embodiment of the temperature control circuit 10 of the constant temperature warehouse 1. As shown in FIG. AC is an alternating current power source, and a parallel circuit of a heater 5 and a door heater 9 is connected in series with a bidirectional three-terminal thyristor 11. 12 is a rectifier circuit that constitutes a gate trigger circuit of the bidirectional three-terminal thyristor 11; 13a is a photothyristor cover 1 that controls energization of the rectifier circuit 12;
3 thyristor. 14 is a control circuit;
Based on the detection operation of the temperature detection element 15 that detects the temperature inside the storage chamber 3, the photothyristor coupler 13 is controlled to maintain a desired constant temperature. The photothyristor coupler 13 is maintained at the output of the control circuit 14, and when the output of the control circuit 14 is at a high potential (hereinafter referred to as "H"), the thyristor 13a becomes conductive, and when the output of the control circuit 14 is at a low potential (hereinafter referred to as "L"). At times the thyristor 13a is non-conducting. When the thyristor 13a conducts, the bidirectional three-terminal thyristor 11 is triggered and conducts, and the heater 5 and the door heater 9 are energized, causing both heaters 5 and 9 to generate heat. That is, the control circuit 14 outputs "H" depending on the temperature inside the storage chamber 3 at that time.
As a result, the amount of heat generated by both the heaters 5 and 9 is increased or decreased to maintain the inside of the storage chamber 3 at a desired constant temperature. The control circuit 14 operates by P control (proportional control) or PI control (proportional integral control) so as to eliminate the difference between the set temperature and the temperature inside the storage chamber 3, that is, so that both are always at the same value.
ここで両ヒーター５，９のQr，QDは式の関
係に則つて設定しておけば、両ヒーター５，９が
同じ時間通電される事によつて内扉６の内面に結
露は生じない。従つて扉ヒーター９は格別な制御
回路を必要とせず、ヒーター５と並列接続して温
度制御回路１０によつて制御すれば良くなる。 If Q r and Q D of both heaters 5 and 9 are set according to the relationship in the formula, dew condensation will not occur on the inner surface of inner door 6 when both heaters 5 and 9 are energized for the same time. do not have. Therefore, the door heater 9 does not require a special control circuit, and can be connected in parallel with the heater 5 and controlled by the temperature control circuit 10.
(ヘ) 発明の効果
本発明によれば恒温庫の内扉内面への結露を確
実に防止する事が出来る。又、内扉を加熱する扉
ヒーターの制御を貯蔵室内温度制御用の回路によ
つて制御する事が可能となり、格別な制御回路が
不要となると共に、貯蔵室内温度の種々の設定温
度に拘わらず内扉内面温度を貯蔵室内温度と一致
せしめられるので、制御が容易且つ確実となる。(F) Effects of the Invention According to the present invention, it is possible to reliably prevent dew condensation on the inner surface of the inner door of a constant temperature warehouse. In addition, the door heater that heats the inner door can be controlled by the storage room temperature control circuit, eliminating the need for a special control circuit and regardless of the various storage room temperature settings. Since the temperature on the inner surface of the inner door can be made to match the temperature inside the storage room, control becomes easy and reliable.
各図は本発明の実施例を示すもので、第１図は
恒温庫の概略側断面図、第２図は温度制御回路図
である。
２…断熱箱体、３…貯蔵室、５…ヒーター、６
…内扉、７…外扉、９…扉ヒーター。
Each figure shows an embodiment of the present invention; FIG. 1 is a schematic side sectional view of a thermostatic chamber, and FIG. 2 is a temperature control circuit diagram. 2...Insulating box body, 3...Storage room, 5...Heater, 6
...Inner door, 7...Outer door, 9...Door heater.
Claims (1)
閉塞する様取り付けた断熱外扉と、該外扉と前記
断熱箱体間に於いて該断熱箱体の開口を開閉自在
に閉塞する様取り付けた内扉とから成り、貯蔵室
内を所定の恒温度に制御する恒温庫に於いて、前
記貯蔵室内を加熱する様設けた貯蔵室内加熱ヒー
ターと前記外扉内面を加熱する様設けた扉ヒータ
ーとから成り、前記貯蔵室内加熱ヒーターの単位
時間当りの発熱量に対する前記扉ヒーターの単位
時間当りの発熱量の比率が前記貯蔵室内空気と周
囲空気との熱貫流係数に対する前記外扉内面と前
記周囲空気との熱貫流係数の比率に略一致する様
設定した事を特徴とする恒温庫。1. An insulating box, an insulating outer door attached to open and close the opening of the insulating box, and an insulating outer door that opens and closes the opening of the insulating box between the outer door and the insulating box. In a constant-temperature warehouse that controls the inside of the storage room to a predetermined constant temperature, the storage room is made up of a storage room heating heater that is installed to heat the inside of the storage room, and a door that is installed to heat the inner surface of the outer door. a heater, and the ratio of the calorific value per unit time of the door heater to the calorific value per unit time of the storage room heating heater is determined by the inner surface of the outer door and the A constant temperature warehouse characterized by being set to approximately match the ratio of the heat transmission coefficient to the surrounding air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16086783A JPS6051917A (en) | 1983-08-31 | 1983-08-31 | Thermostatic storehouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16086783A JPS6051917A (en) | 1983-08-31 | 1983-08-31 | Thermostatic storehouse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6051917A JPS6051917A (en) | 1985-03-23 |
| JPH0317121B2 true JPH0317121B2 (en) | 1991-03-07 |
Family
ID=15724082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16086783A Granted JPS6051917A (en) | 1983-08-31 | 1983-08-31 | Thermostatic storehouse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6051917A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2621142A1 (en) * | 1987-09-25 | 1989-03-31 | Satin Dominique | Industrial electronic thermostat (3000 watts) |
| JPH0221033A (en) * | 1988-07-08 | 1990-01-24 | Isuzu Motors Ltd | Automatic clutch controller |
| JP2719150B2 (en) * | 1988-07-15 | 1998-02-25 | タバイエスペック株式会社 | Incubator |
| JPH0631920Y2 (en) * | 1988-12-30 | 1994-08-24 | 新田ゼラチン株式会社 | Carbon dioxide incubator |
| CN103268128A (en) * | 2013-04-15 | 2013-08-28 | 上海理工大学 | Microenvironment temperature control system based on singlechip |
-
1983
- 1983-08-31 JP JP16086783A patent/JPS6051917A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6051917A (en) | 1985-03-23 |
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