JPS59112254A - Heating and cooling device for sample - Google Patents

Abstract

PURPOSE:To heat and cool easily a sample by arranging a flow passage for a cooling medium and a heater at a sample storage part, and supplying the cooling medium and powering on the heater alternately. CONSTITUTION:The sample storage part 1 is equipped with a heat insulating case 3 having a lid body 2 on it and a jacket 4 provided in the heat insulating case 3. The jacket 4 is cylindrical and has a sample storage hole 5 at its center part and numbers of grooves 6 at the outer circumference. The cooling medium is supplied from a pipe 9 to those grooves 6 and discharged from a pipe 10. Plural heaters 11 and sensors 12 which detect the temperature of the jacket 4 are embedded along the sample storage hole 5 between the hole 5 and grooves 6. The supply of the cooling medium and the power supply to the heaters 11 are carried out alternately by a timer and an operator heats and cools extremely easily the sample.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating and cooling device used for researching the origins of samples such as semiconductor materials and uranium petals.

In order to analyze the thermal properties of materials such as semiconductor materials and uranium petals, it has been conventionally practiced to periodically heat and cool the above-mentioned samples.

However, in the past, the sample had to be artificially moved back and forth between the heating source and the cooling source installed at a distance b1 to alternately heat and cool the sample, which was extremely time-consuming and time consuming. The heating/cooling period fluctuates, resulting in inconveniences such as the inability to perform the above-mentioned feature analysis with high accuracy.

In view of this situation, the present invention seeks to provide a sample heating and cooling device that can repeatedly heat and cool a sample without moving the sample.

Therefore, in the present invention, a sample storage section is provided in which a cooling medium flow path and a heater are arranged, and a means for alternately supplying the cooling medium and supplying power to the heater is provided. .

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 shows an embodiment of the main body portion of a heating and cooling device according to the present invention, and FIG. 2 is a sound circuit diagram showing the overall configuration of the device of this embodiment.

In FIG. 1, the reference numeral 1 indicates a sample storage section (not shown), and this storage section 1 consists of a heat insulating case 3 with a lid 2 fitted above it, and a jacket 4 fitted into the heat insulating case 3.
It is equipped with

The jacket 4 has a cylindrical shape as shown in FIG.
A sample storage hole 5 is formed in the center, and multiple grooves 6 are formed along the circumferential direction on the outer circumferential surface, and grooves 7 and 8 are formed longitudinally through the grooves 6 at symmetrical positions on the outer circumference. It is.

The groove 7 is closed at the top and has a lower end that exposes the tip of a pipe 9 (see FIG. 1) for introducing the cooling medium. Further, the groove 8 is open at both its upper and lower parts, and a pipe 1 for discharging the cooling medium is provided inside the groove 8.
0 (see Figure 1). Note that the above pipe 1
o opens slightly below the upper end of the groove 8.

Further, in the jacket φ, as shown in FIG. A sensor 12 for detecting the temperature of the jacket 1 is embedded.

As shown in FIG. 2, the pipe 9 is connected to the electromagnetic switching valve 13.
Coolant 16 via cock 14s and pump 157a'
The pipe 10 is connected to the tank 17 in which oil (for example, silicone oil) is stored, and the pipe 10 is connected to the tank 17 via a mixer 18'. The pump 15 and mixer 18 are connected to each other via a cock 19.

The timer 20 shown in FIG. 4 controls the heater 11 and the electromagnetic switching valve 13''a for one hour, and outputs the heater operation signal S1 for the time t1 shown in FIG.
Outputs the solenoid switching valve drive signal StV. The heater control circuit 21 controls the temperature of the jacket 4 to preset values TI, Q.
(for example, 200 C) is detected by the sensor 12.
Judging from the output signal of , when the above temperature 'rh\ is reached, even if the above signal S1 is output, the heater J
It acts to cut off the power supply to 1.

The tank 17 is placed in a refrigerator 22, and the cooling medium 16 in the tank is constantly cooled by this refrigerator.

8. The heat insulating case 3 and its lid 2 are each filled with a heat insulating material 23 inside thereof.

The operation of the device of this embodiment is as follows.

First, before operating the device, remove the lid 2 and place a sample such as uranium bed in a pellet in the sample storage hole 5 (
(not shown) and attach the lid 2 again. Note that the lid body 2 has a cap 24 on its lower surface, and at the same time as the lid body 2 is attached, this cap 24 is attached to the opening of the sample storage hole 5.

After the sample is stored, when the timer 20 outputs the signal S1, power is supplied to the heater 11, and the temperature of the jacket rises in the manner illustrated in FIG. 4. The temperature of the jacket 4 is the preset temperature T.
When it rises to h□D, the power supply to the heater 11 is cut off, so the rise rate stops increasing, and from the time when the signal S1 is output, the time 1. & When the signal S1
Instead, a signal S2 is output from the timer 20.

The signal S energizes the solenoid of the solenoid valve 130 to switch the valve, so that the cooling medium 16 discharged from the pump 15 flows from below the groove 7 of the jacket 4 through the pipe 9. The medium 16 moves upwardly through the groove 6 without circulating around the jacket surface. The cooling medium 16 that has passed through the groove 6 flows into the upper end of the pipe 10 through the vertical groove 8 (see FIG. 3) and returns to the tank 17 via the pipe IO and the mixer 18. After being cooled by the refrigerator 22, it is sent into the jacket 4 again by the pump 15.

As a result 1, the heated jacket 4 is rapidly cooled, and the temperature of the jacket drops to the temperature TO in the manner illustrated in FIG. 4. Note that the temperature Tc is 22 is determined by the cooling temperature of the cooling medium 16.

Thus, each time the timer 2o outputs the signals S, , S, periodically, the temperature of the jacket rises and falls in the manner shown in FIG. It is heated and cooled periodically.

The number of repetitions of heating and cooling can be checked by counting the output signal S1 or s, 4 of the timer with a counter (not shown).

By the way, the pipe l passes through the jacket 4.

If the high temperature cooling medium 16 flowing into the tank 17 is directly returned to the tank 17, there is a possibility that the medium cannot be cooled smoothly. Therefore, in this embodiment, a part of the cooling medium 16 discharged from the pump 15 is made to flow into the mixer 18 via the cock 197, where it is mixed with the medium 16 that has passed through the pipe 1O. In this way, the top of the medium 16 in the tank 17 will not rise suddenly, so the refrigerator 2
The medium 16 is cooled more smoothly by the cooling medium 16.

The time t1 shown in FIG. 4 can be changed as appropriate by adjusting the power supplied to the heater 11 using a power regulator (not shown) attached to the heater control circuit 21. Further, the time t2 shown in the figure can be changed by adjusting the flow rate of the cooling medium using the cock 14.

Further, in the above embodiment, the temperature Tc is determined based on the cooling capacity of the cooling medium 16, but as in the case of the heater 11, the configuration is such that the output signal of the temperature sensor is used to select and set the temperature Tc. Of course, this is also possible. Of course, the temperature Tc4 is controlled by the freezing temperature controller of the refrigerator 22.
It is also possible to specify

Furthermore, in the above embodiment, the heating time and the cooling time are managed by the timer 2o, but when the jacket temperature rises to Thx 4' using the output signal of the temperature sensor, the electromagnetic switching valve 13 5, the heater l1g may be activated when the temperature drops to Tc.

According to the present invention, it is possible to operate a heating and cooling device for a sample without moving the sample, so operation by an operator is extremely easy, and since a means for alternately heating and cooling is provided, Heating and cooling of samples can be performed with precision.

[Brief explanation of the drawing]

゛ Fig. 1 is a partially sectional side view of an embodiment of the main body of the heating/cooling device according to the present invention, Fig. 2 is a circuit diagram showing the overall configuration of the device according to the present invention, FIG. 3 is a perspective view showing the structure of the jacket, and FIG. 4 is a diagram illustrating the mode of temperature change in the jacket. l... Sample storage section, 2... Lid, 3... Heat insulation case, 4... Jacket, 5... Sample storage hole, 6, 7
．． 8... Groove, 9, lO... Pipe, 11... Heater, 12... Temperature sensor, 13... Solenoid switching valve, 1
5...Pump, 16...Cooling medium, 17...Tank, 18...Mixer, 2o...Timer, 21...
Heater control circuit. -31' Figure 2 Figure 3 Figure 4 Poem

Claims (1)

[Claims] A sample storage section comprising a sample storage section in which a cooling medium flow path and a heater are arranged, and means for alternately supplying the cooling medium to the flow path and supplying power to the heater. Heating and cooling equipment.