JP2001324176A - Blast temperature control vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately control temperature in a vessel used for a drier, culture device, incubator, dry heat sterilizer or the like, by eliminating uneven temperature distribution in the vessel. SOLUTION: A blast temperature control vessel at least has a temperature control vessel main body 2 in which a temperature sensor 30, a heater 20 and a sirocco fan 8 are disposed in a box 4 having an opening and closing door 6, and has a controller 38 for controlling electric power supplied to the heater 20 by receiving detection signals from the sensor 30. A blast guide plate 28 having an air suction hole 26 is provided in front of the sirocco fan 8. Preferably, an outdoor air intake hole 12 should be formed in a back wall 10 of the vessel, which is located rearward of the sirocco fan 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast temperature control tank capable of setting an internal temperature to a desired temperature, and more particularly to a blast temperature control tank in which the temperature in a blast temperature control tank is uniform and accurate. About. The temperature control tank is, for example, a dryer, an incubator,
Used for incubators, dry heat sterilizers, etc.

[0002]

2. Description of the Related Art A temperature control tank capable of arbitrarily setting the temperature in a tank or changing the temperature in the tank arbitrarily includes, for example, a dryer, an incubator, an incubator, a dry heat sterilizer, and a thermostat. Widely used as tanks and the like. These devices are used in physics and chemistry laboratories,
Widely used in various factories.

FIG. 2 shows an example of a conventional dryer using the above-mentioned temperature control tank.

[0004] In FIG. 2, reference numeral 80 denotes a temperature control tank having a hollow rectangular parallelepiped inside, to which an opening / closing door 82 is attached. The object to be dried is passed through the opening / closing door 82 so that the temperature control tank 8
0 inside and out.

A heater 84 is attached to the bottom of the temperature control tank main body 80, and the heater 84 is connected to a controller 86 mounted below the temperature control tank main body 80 by a lead wire 88.

Reference numeral 90 denotes a temperature sensor,
0 is inserted into the main body 80 of the temperature control tank through the back wall 92. A cable 94 sends an output signal of the temperature sensor 90 to the controller 86.

The temperature inside the temperature control tank main body 80 is detected as an electric signal by the temperature sensor 90 and sent to the controller 86 through a cable 94. The controller 86 compares the signal value with the set value and controls the power supplied to the heater, so that the temperature in the temperature control tank main body 80 is controlled to a desired temperature.

Reference numeral 96 denotes an exhaust port provided on the upper wall of the temperature control tank main body 80, and 98 denotes a storage shelf.

The dryer having the above-described structure has a problem that the temperature distribution among the upper, lower and corner portions in the tank is so large that it cannot be used for applications requiring precise control of the temperature in the tank.

[0010]

In order to solve the above problems, the inventor of the present invention has mounted a sirocco fan in the tank, provided a predetermined guide plate in front of the fan, and further provided a sirocco fan. It has been found that the temperature inside the bath can be adjusted with extremely high precision by forming an outside air intake hole at the rear, and the present invention has been completed. Therefore,
An object of the present invention is to solve the above-mentioned problem and to provide a ventilation temperature control tank having high uniformity of the temperature in the tank.

[0011]

The present invention that achieves the above object is as follows.

[1] A temperature control tank in which a temperature sensor, a heater, and a sirocco fan are mounted in a housing having an opening / closing door, and a controller that takes in a detection signal of the temperature sensor and controls power supplied to the heater. Wherein a guide plate having an air suction hole formed in front of the sirocco fan is provided.

[2] The ventilation temperature control tank according to the above [1], which has an outside air intake hole in a back wall of the temperature control layer behind the sirocco fan.

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

[0015]

FIG. 1 is a schematic view showing an example of an embodiment of the present invention.

In FIG. 1, reference numeral 2 denotes a temperature control tank, which comprises a rectangular parallelepiped housing 4 and a door 6. The housing 4
The door 6 is formed of a metal double plate, and is filled with a heat insulating material (not shown) such as glass fiber or asbestos.

A sirocco fan 8 is mounted inside the temperature control tank main body 2, and a back wall 1 behind the sirocco fan 8 is provided.
Rotary shaft 1 inserted in outside air intake hole 12 formed
The motor 16 attached to the outside of the temperature control tank main body 2 by 4
Is transmitted to the sirocco fan 8. Since the outside air intake hole 12 is formed to be sufficiently larger in diameter than the rotating shaft 14, air outside the tank passes through the gap 18 between the outside air intake hole 12 and the rotating shaft 14 as shown by an arrow A. It is adapted to be inhaled appropriately. The size of the gap is determined experimentally, but usually the diameter of the outside air intake hole 12 is preferably about 1.5 to 3 times the diameter of the rotating shaft 14.

A heater 20 made of a heating resistor such as a nichrome wire is attached to the sirocco fan 8 so as to surround the sirocco fan 8. The lead wire 22 of the heater 20 penetrates through the back wall 10 of the temperature control tank main body 2 and is drawn out of the temperature control tank main body 2. Reference numeral 24 denotes a wiring fixing screw provided on the lead wire 22.

At the front of the sirocco fan 8 in the axial direction, a blower guide plate 28 having a suction port 26 formed at the center thereof is mounted parallel to the back wall 10 at a predetermined distance from the back wall 10. Then, when the sirocco fan 8 is operated, as shown by an arrow B, the air in the temperature control tank main body 2 sucked from the air inlet 26 passes through the gap between the back wall 10 and the ventilation guide plate 28, and It is designed to be blown out from the periphery into the temperature control tank.

Reference numeral 30 denotes a case that penetrates the housing 4 and has
A wiring mounting screw 32 is attached to the rear part of the sensor inserted therein. In addition, 34 is a storage shelf attached in the housing 4, and 36 is an exhaust port formed on the upper wall of the housing 4. The opening degree of the exhaust port 36 can be arbitrarily adjusted by a shutter (not shown).

A controller 38 is mounted on the upper surface of the temperature control tank main body 2. This controller 38
Is a separate device that is structurally independent and separate from the temperature control tank main body 2.

The controller 38 and the sensor 30
Are electrically connected by a flexible cable 40.
The controller 38 and the lead 22 of the heater 20 are electrically connected by a flexible cable 42.

Reference numeral 44 denotes a flexible power supply cable for supplying power to the motor 16, and reference numeral 46 denotes a so-called one-touch type connector.

As described above, since the cables 40, 42, and 44 are flexible and bendable, the place where the controller 38 is mounted is not limited to the upper part of the main body 2 of the temperature control tank. Can be installed.

In the controller 38, an arbitrary desired temperature is set in advance. The sensor 30 sends an electric signal corresponding to the temperature inside the thermostat main body 2 to the controller 38. The controller 38 having received the electric signal of the sensor 30 compares the set temperature with the temperature in the temperature control tank main body 2 and sends electric power corresponding to the temperature difference to the heater 20 through the cable 42. Thereby, the temperature in the temperature control tank main body 2 is controlled to the set temperature. Various control methods such as on / off control, proportional control, proportional integral control, and PID control are adopted as the control method.

In the above embodiment, the sensor 3
0, and a lead wire 22 and a cable 40 of the heater 20;
Although the connection with the wire 42 was performed using a wire mounting screw, the present invention is not limited to this, and a commonly used connection method such as soldering, a connector, or a socket is appropriately used. Furthermore, the opening and closing door 6
Is not limited to the front as shown in the figure, but may be, for example, the upper part. Further, the controller 20 can be installed at any location within the reach of the cable. Further, the controller may be formed integrally with the temperature control tank without being separated.

In the above embodiment, the fan is mounted on the back wall. However, the present invention is not limited to this.
A low wall may be used, and in this case, the ventilation guide plate is also moved accordingly.

Further, although the outside air intake hole is shared with the opening for inserting the rotation shaft of the fan, the invention is not limited to this, and it may be formed separately on the back wall, and the number may be plural.

[0029]

According to the present invention, the inside of the tank is blown using a sirocco fan, a blow guide plate is attached to the front of the fan, and if necessary, an outside air intake hole is formed in the back wall of the fan. The temperature in the tank is uniform and can be accurately controlled.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view showing an example of a temperature control tank of the present invention.

FIG. 2 is a schematic side sectional view showing an example of a conventional temperature control tank.

[Explanation of symbols]

 2,80 Main body for temperature control tank 4 Housing 6,82 Open / close door 8 Sirocco fan 10,92 Back wall 12 Outside air intake hole 14 Rotary shaft 16 Motor 18 Gap 20,84 Heater 22,88 Lead wire 24 Wiring mounting screw 26 Intake hole 28 Ventilation guide plate 30, 90 Sensor 32 Wiring mounting screw 34, 98 Storage shelf 36, 96 Exhaust port 38, 86 Controller 40, 42, 44, 94 Cable 46 Connector

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H022 AA02 BA01 BA07 CA50 DA01 DA09 3H034 AA02 AA06 AA13 BB02 BB06 BB19 CC03 DD02 DD28 EE02 EE15 3L054 BE02 3L113 AA01 AB01 AC08 AC44 AC51 AC54 AC64 BA39 CA08 CB05 DA09

Claims (2)

[Claims] 1. A temperature sensor in a housing having an opening / closing door,
With a temperature control tank equipped with a heater and a sirocco fan,
A controller for taking in the detection signal of the temperature sensor and controlling the electric power supplied to the heater, wherein a guide plate having an air suction hole formed in front of the sirocco fan is provided. Characteristic blast temperature control tank. 2. The air temperature control tank according to claim 1, further comprising an outside air intake hole in a rear wall of the temperature control layer behind the sirocco fan.