JP3423012B2 - Constant temperature device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermostatic device for controlling the inside of a thermostatic chamber at a predetermined temperature to dry medical instruments and samples, and for aging and water evaporation in the engineering field.

[0002]

2. Description of the Related Art A conventional thermostatic device of this type is disclosed in Japanese Patent Laid-Open No. 2-9.
As shown in Japanese Patent No. 3281, the temperature inside the room can be controlled. That is, an inner plate provided at a predetermined interval so as to form an air passage in an inner box forming a temperature-controlled room, a blower provided in the air passage, an air outlet and a suction provided in the inner plate. Mouth, heating means arranged in the ventilation passage near the suction opening, a fan guard fixed to the inner plate so as to cover the suction opening, a temperature sensor provided near the fan guard, and this temperature sensor And a controller for controlling the heating means and the blower on the basis of a signal from the controller to control the temperature inside the temperature-controlled room to a predetermined temperature.

Further, the temperature control device is housed in an electrical equipment box adjacent to the outer box, and the inside of the box is also cooled by ventilation by a blower.

Further, the outer box is made of a steel plate and the inner box is made of a stainless plate.

[0005]

However, according to the above configuration, there is a problem that the warm air in the temperature-controlled room rises and heat is easily radiated from the top plates of the inner box and the outer box, so that the top plate is heated. . Furthermore, since both the outer box and the inner box are made of metal, heat conduction from the inner box to the outer box is large, which promotes a rise in temperature of the outer box.

The present invention has been made to solve the above problems, and suppresses the temperature rise of the outer box with a simple structure.
It is an object of the present invention to provide a thermostatic device having a high temperature control system and less danger during work.

[0007]

According to the present invention, there is provided an insulating box body formed of an outer box, an inner box, and a heat insulating material filled between the two boxes, and a thermostatic chamber formed in the heat insulating box body. A thermostatic device comprising a temperature control device for controlling the inside of a thermostatic chamber to a predetermined temperature, wherein a ventilation duct for circulating outside air is formed on the top surface of the outer box.

[0008] Further , an insulating box formed of an outer box, an inner box, and a heat insulating material filled between the two boxes, a temperature-controlled room formed in the heat-insulated box, and the temperature inside the temperature-controlled room are controlled to a predetermined temperature. In a constant temperature device having a temperature control device, a ventilation duct for circulating outside air is formed on the top surface of the outer box, and a heat insulating material is interposed in the connecting portion between the outer box and the inner box. Is.

[0009]

According to the thermostatic device of the present invention, the top plate of the outer box can be cooled by the air passing through the ventilation duct, and the temperature rise of the outer box can be suppressed. By connecting the ventilation duct to the inside of the electrical equipment box, the outside air can be circulated through the ventilation duct using the existing blower, and the cooling effect of the outer box can be promoted.

Further, since the heat insulating material is interposed in the connecting portion between the outer box and the inner box, it is possible to suppress the heat conduction from the inner box to the outer box and further suppress the temperature rise of the outer box. it can.

[0011]

EXAMPLES Examples of the present invention will be described below. 1 is a thermostatic device of the present invention. This thermostatic device is composed of a heat insulating box body 4 in which a heat insulating material is filled between an outer box 2 and an inner box 3, and a door 5 for opening and closing an opening of the heat insulating box body 4. A constant temperature chamber 6 for storing samples and the like is formed in the inner box 3, and a plurality of stages of net shelves 8 supported by shelf columns 7 are arranged in the constant temperature chamber 6. Further, inner plates 11 are arranged inside the right side plate 9 forming the inner box 3 so as to form a ventilation duct 10 at a predetermined interval. An air outlet 12 is formed at the upper and lower ends of the inner plate 11, and an air inlet 13 is formed at the center. 1 4 is a centrifugal fan disposed within the air duct 10 in correspondence with the inlet 13. 15
Is an electric heater annularly arranged around the suction port 13 in the ventilation duct 10. Reference numeral 16 denotes a fan guard fixed to the inner plate 11 with screws so as to cover the suction port 13. A temperature sensor 18 is provided near the fan guard 16 for temperature adjustment. This temperature sensor 18
The thermocouple is slenderly formed by housing it in a stainless steel tube.

Further, the right end portion of the outer box 2 includes a control for controlling the temperature signal from the sensor 18 to be had based Dzu blower 14 and electric heater 15 energized controlled to a constant temperature chamber 6 to a predetermined set temperature An electrical equipment box 17 accommodating the device 24 is integrally formed. It said this is the electrical box within 17 air blower 14
It is cooled by a blower 19 driven coaxially with. That is, the outside air sucked from the intake hole 20 formed in the center of the right side surface of the electrical equipment box 17 is discharged from both the discharge hole 22 formed in the bottom plate 21 and the discharge hole 27 formed in the front surface of the top plate 23 and then the electrical equipment box. It circulates in 17 to cool the electrical components in the box. Here, since a ventilation duct 28 is formed in front of the top plate 23 so as to communicate with the inside of the electrical equipment box 17 and between the outer box 2 and the outer box 2, the upper surface of the outer box 2 is made good by the air passing through this duct. To be cooled. Incidentally, 30 and 31 are packings,
25 is a display panel for displaying the set temperature and the internal temperature, 26
Is an operation panel such as an operation switch and a temperature setting switch.

Further, L-shaped protruding metal fittings 33 are formed on the opening edge 32 of the outer box 2 at intervals, while the inner box 3 has a flange corresponding to the metal fitting 33 of the outer box 2. 34
Are formed. Then, the inner box 3 is screwed by setting the flange 34 on the metal fitting 33. At this time, the metal fitting 3
A heat insulating material 35 made of a silicon resin material is interposed between the flange 3 and the flange 3. The heat insulating material 35 is formed into a C-shaped cross section as shown in FIG.

As a result, even if the outer box 2 and the inner box 3 are made of metal, the heat insulating material 35 having a low thermal conductivity is formed at the connecting portion between the two boxes 2 and 3.
The heat conduction from the inner box 3 to the outer box 2 can be suppressed because of the interposition of the, and the temperature rise of the outer box 2 can be further suppressed.

[0015]

As described above, according to the thermostatic device of the present invention, the top plate of the outer box can be cooled by the air passing through the ventilation duct, and the temperature rise of the outer box can be suppressed. By connecting the ventilation duct to the inside of the electrical equipment box, the outside air can be circulated through the ventilation duct using the existing blower, and the cooling effect of the outer box can be promoted.

Further, since the heat insulating material is interposed at the connecting portion between the outer box and the inner box, it is possible to suppress the heat conduction from the inner box to the outer box and further suppress the temperature rise of the outer box. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a thermostatic device of the present invention.

FIG. 2 is a vertical sectional view of a thermostatic device.

FIG. 3 is a front view of a thermostatic device.

FIG. 4 is a transparent side view of the thermostatic device.

FIG. 5 is a sectional view of a main part of a thermostatic device.

FIG. 6 is an exploded perspective view of a heat insulating box.

FIG. 7 is an exploded perspective view of a main part of a heat insulating box.

FIG. 8 is a cross-sectional view of a main part of a heat insulating box.

FIG. 9 is a perspective view of a main part of an outer box.

[Explanation of symbols]

1 Constant temperature device 2 outer box 3 inner box 4 Insulation box 6 constant temperature room 9 Right side plate 14,19 blower 17 electrical equipment box 22, 27 outlet 23 Top plate 28 Ventilation duct

Claims (2)

(57) [Claims] 1. A heat insulating box formed of an outer box, an inner box, and a heat insulating material filled between the two boxes, a temperature-controlled room formed in the heat-insulated box, and a temperature controlled inside the temperature controlled room. In the thermostatic device including the temperature control device, a ventilation duct for circulating outside air is formed on the top surface of the outer box. 2. An insulating box formed of an outer box, an inner box, and a heat insulating material filled between the two boxes, a temperature-controlled room formed in the heat-insulated box, and a temperature controlled inside the temperature-controlled room. In a constant temperature device including a temperature control device to form a ventilation duct for circulating the outside air on the top surface of the outer box,
A thermostatic device, characterized in that a heat insulating material is interposed at a connecting portion between the outer box and the inner box.