JPS627387Y2 - - Google Patents

Description

[Detailed description of the invention] The invention relates to a stirring type constant temperature device that can be used for the purposes of chemical operations, chemical reactions, heat resistance tests, culture, surface chemical tests, corrosion tests, anticorrosion tests, and equipment cleaning. .

Conventionally, air bath type, water bath type, or oil bath type have been proposed as representative constant temperature devices used for the above purposes, but the temperature range obtained from these constant temperature devices is limited. It was narrowly limited, and there were few that could easily and accurately stir in a constant temperature state.

In other words, in the case of conventional air bath-type constant temperature devices, even if they can stir internally, the temperature can only reach 100℃ at most, and it is not possible to obtain a temperature higher than that, and they are generally large and take a long time to reach a certain temperature. Moreover, the accuracy of temperature control was only roughly within the range of ±1 to 5°C.

In addition, the water tank type had the inconvenience of being able to obtain a temperature of only 100°C or less, requiring water replenishment as the liquid level was constantly dropping, and making the immersed items wet.

Furthermore, since it is in a liquid, it is inconvenient that it cannot be stirred sufficiently.

Furthermore, although oil tank types can be used at high temperatures, they are limited to temperatures of 150 to 200 degrees Celsius, which has the disadvantage that the oil used gradually deteriorates and the immersed items become contaminated with oil. It is almost the same as the aquarium type that stirring is difficult.

Therefore, the present invention eliminates the drawbacks of the conventional constant temperature equipment, has a wide operating temperature range, is capable of stirring under a strictly controlled constant temperature, and is capable of stirring various types of equipment without causing contamination and under reduced pressure. The purpose was to provide a stirring type constant temperature device that could be operated.

That is, in the stirring-type constant temperature device of the present invention, a container is formed with the peripheral side and the bottom made of a metal with high thermal conductivity, a heating device is installed on the peripheral side of the container, and a heat-retaining device is installed at the bottom of the container. Stirring type constant temperature device equipped with a magnetic stirring device that stirs the aluminum plate and container from the outside. It consists of

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front cross-sectional view of the stirring type constant temperature apparatus in Embodiment 1 of the present invention, and FIG. 2 is a perspective view of the external appearance of FIG. 1. be.

First, as shown in Fig. 1, this stirring type constant temperature device is mounted on a support stand 1 and has a container 2 with an open top and a peripheral side and bottom made of metal with high thermal conductivity. , the container 2
It consists of a heater 3, which is a heating device capable of heating the container 2 from its peripheral side, and a magnetic stirring device consisting of a magnet 5 rotated by a motor 4, which can stir the bottom of the container 2 from the outside.

Therefore, the peripheral side of this container 2 is filled with a heat insulating material 6 on the outside of the heater 3 and a metal block 7
Moreover, between the bottom of the container 2 and the magnet 5, a heat-retaining aluminum plate 8 and a heat-shielding asbestos plate 9 are interposed.

In addition, a flat plate 19 provided on the upper surface of this container 2
The top of the container 2 is covered with a glass bell 11 through a heat-resistant and chemical-resistant rubber 10, and a gas vent hole 12 is provided at the top of the glass bell 11. A degassing tube 14 having a hole 13 is provided, and by using the hole 12 and the degassing tube 14, the inside of the container 2 is replaced with nitrogen gas or the like to enable constant temperature operation of unstable samples. . A circular glass plate may be used in place of the glass bell 11, and in this case, a gas venting tube 14 is used to reduce the pressure or return it to normal pressure.

Furthermore, in order to maintain the temperature inside the container 2 constant by the heater 3, a thermistor 15 embedded in the heat-insulating aluminum plate 8 is provided, and it is connected to an indicating temperature controller 17 on the panel 16 shown in FIG. Then turn on heater 3. At the same time, the pilot lamp 18 is turned on and off, and the motor 4 for driving the magnet 5 is turned on. A stirrer 20 and its pilot lamp 18 to be turned off are also provided on this panel 16.

In the stirring-type constant temperature device of the present invention having the above configuration, since the thermal conductivity of the container 2 is extremely good, the temperature can be raised and lowered quickly and the temperature can be easily controlled. For example, at low temperatures, it takes about 15 to 20 minutes. In addition, it reaches a constant temperature in about 25 to 30 minutes at high temperatures, and its accuracy is extremely accurate regardless of the temperature.
In the case of constant voltage, ±0.2 within a certain time
It has been confirmed in experimental results that temperatures in the range from 0.4°C to 0.4°C can be obtained, and temperatures in the range from ±0.5 to 1.0°C can be obtained even over long periods of time.

Therefore, the stirring-type constant temperature device of the present invention can maintain a constant temperature state up to a relatively high temperature range, has high accuracy in temperature control, and is stirred externally using a magnetic stirrer, so that sufficient stirring cannot be performed. It has the advantage of being

In addition, because the temperature is well controlled, it can be safely used continuously at night, and it can be used continuously for weeks to months with just electricity.
The constant temperature device of the present invention can be effectively applied to applications that require a long time, such as drying, chemical reactions, washing, culturing, and observing changes over time.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a stirring type constant temperature apparatus in Example 1 of the present invention, and FIG. 2 is an external perspective view of FIG. 1. 2... Container, 3... Heater, 5... Magnet, 6... Insulating material, 17... Indicating temperature controller.

Claims (1)

[Scope of utility model claims] A container is formed of a metal with high heat conductivity on the side and bottom, and a heating device is installed on the side of the container, and an aluminum plate for heat retention is placed on the bottom of the container, as well as a magnetic type that stirs from the outside of the container. Stirring type constant temperature device equipped with a stirring device.