JPS62180763U

JPS62180763U -

Info

Publication number: JPS62180763U
Application number: JP6912186U
Authority: JP
Priority date: 1986-05-07
Filing date: 1986-05-07
Publication date: 1987-11-17
Anticipated expiration: 2001-05-07
Also published as: JPH0643735Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す構成説明図
、第２図及び第３図はこの考案におけるカラム恒
温槽の設定温度と、これに対応する適正なステツ
ピングモータの回転数との関係を示すグラフであ
る。１……ヒータ、２……センサー、３……温度設
定器、４……温調手段、５……室温検出手段、６
……比較手段、７……カラム恒温槽、８……フア
ン、９……ステツピングモータ、１０……周波数
変換手段。 Fig. 1 is a configuration explanatory diagram showing one embodiment of this invention, and Figs. 2 and 3 show the relationship between the set temperature of the column constant temperature bath and the corresponding appropriate rotation speed of the stepping motor in this invention. This is a graph showing. 1... Heater, 2... Sensor, 3... Temperature setting device, 4... Temperature control means, 5... Room temperature detection means, 6
... Comparison means, 7 ... Column thermostat, 8 ... Fan, 9 ... Stepping motor, 10 ... Frequency conversion means.

Claims

[Scope of utility model registration request]

A heater installed inside the column constant temperature bath, a sensor installed inside the column constant temperature bath to detect the temperature inside the bath, and a temperature setting installed outside the column constant temperature bath to set the temperature inside the bath to a predetermined temperature. The detection signal of the sensor installed outside the column constant temperature chamber is compared with the temperature setting signal output from the temperature measuring device, and if the detection signal is smaller than the temperature setting signal and the difference is within a predetermined value, the heater is heated. A temperature control means that outputs an operation stop signal and outputs a heating operation signal to the heater when the detection signal is smaller than the temperature setting signal and the difference is larger than a predetermined value; a fan for stirring the air inside the column; a stepping motor provided outside the column constant temperature bath for rotating the fan;
a frequency conversion means that is provided outside the column constant temperature chamber and outputs a rotation speed conversion signal to the stepping motor so that the stepping motor operates at a preset rotation speed according to a temperature setting signal from a temperature setting device; and a column constant temperature chamber. A room temperature detection means provided outside the column for detecting the temperature outside the tank, a room temperature detection signal output from the room temperature detection means provided outside the column constant temperature chamber, and a temperature setting signal outputted from the temperature setting device are compared. and when the temperature setting signal is larger than the room temperature detection signal and the difference is within a predetermined value, the frequency conversion means is provided with a comparison means for outputting a reduction signal for reducing the rotation speed of the stepping motor by a predetermined rotation speed. Temperature control device for column constant temperature bath.