JP2957804B2 - 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 apparatus for drying medical instruments and samples by controlling the temperature of a thermostatic chamber to a predetermined temperature, and for aging and water evaporation in the field of engineering.

[0002]

2. Description of the Related Art Conventionally, this kind of constant temperature apparatus is disclosed in
As shown in Japanese Patent No. 3281, the temperature of the room can be controlled. That is, an inner plate provided at a predetermined interval so as to form a ventilation path in an inner box forming a constant temperature chamber, a blower provided in the ventilation path, an air outlet and a suction port provided in the inner plate. A mouth, a heating means disposed in an air passage near the suction port, a fan guard fixed to an inner plate so as to cover the suction port, a temperature sensor provided near the fan guard, and the temperature sensor And a control device for controlling the heating means and the blower based on a signal from the controller to control the inside of the constant temperature chamber to a predetermined temperature.

[0003] Here, the outlet is usually formed in a rectangular shape at the upper and lower ends of the inner plate, and heated air is discharged from the upper and lower outlets into the constant temperature chamber.

[0004]

However, according to the above configuration, the outlet is usually formed in a rectangular shape at the upper and lower ends of the inner plate, but when a blower of a centrifugal type is used, If the length of the ventilation path in the vertical direction is not sufficiently ensured, the air volume changes in the width direction of the outlet, and the air discharged from the outlet into the constant temperature chamber does not have a laminar flow, and the temperature distribution in the room is not uniform. There is a problem that the temperature becomes uniform and the temperature control of the constant temperature chamber becomes unstable.

The present invention has been made in order to solve the above-mentioned problem, and has a simple structure so that the amount of air blown out from an air outlet into a constant temperature chamber can be made uniform without increasing the size of the apparatus by forming a long ventilation duct. Therefore, an object of the present invention is to provide a constant temperature apparatus that can stabilize temperature control while promoting uniformization of the temperature distribution in a constant temperature chamber, thereby promoting miniaturization of the apparatus.

[0006]

According to the present invention, there is provided an air outlet and a suction port provided in an inner plate forming a constant temperature chamber, a heating means, a blower and a temperature sensor provided in a ventilation passage in the inner plate. A control device for controlling the heating means and the blower based on a signal from the temperature sensor to control the temperature of the constant temperature chamber to a predetermined temperature, wherein a suction port is formed at the center of the inner plate. In addition, substantially triangular outlets which are point-symmetric with each other are formed at the upper and lower ends of the inner plate.

[0007]

According to the constant temperature apparatus of the present invention, since substantially triangular outlets which are point-symmetric with each other are formed at the upper and lower ends of the inner plate.
In the width direction of the inner plate, since the opening area is small at the outlet on the side where the amount of air from the blower is large, the amount of air blown out is limited, while the opening area on the side where the amount of air from the blower is small is large. Since the total amount of air is blown out and the restriction of the amount of blown air is continuously adjusted in the width direction of the inner plate, the air blown out from the air outlet into the constant temperature chamber has a uniform laminar flow in the width direction. Therefore, with a simple configuration in which the upper and lower ends of the inner plate are cut obliquely to form an air outlet, the temperature distribution in the constant temperature chamber can be made uniform, and a stable temperature can be achieved while promoting miniaturization of the apparatus. It is possible to provide a constant temperature device with which control can be obtained.

[0008]

Next, embodiments of the present invention will be described. 1 is a thermostat of the present invention. The thermostatic apparatus includes a heat insulating box 4 filled with a heat insulating material between an outer box 2 and an inner box 3, and a glass door 5 for opening and closing the opening of the heat insulating box 4. A constant temperature chamber 6 for accommodating a sample or the like is formed in the inner box 3, and a plurality of net shelves 8 supported by shelf columns 7 are arranged in the constant temperature chamber 6. An inner plate 11 is arranged inside the right side plate 9 forming the inner box 3 at a predetermined interval so as to form a ventilation duct 10. This inner plate 1
An air outlet 12 is formed at the upper and lower ends of 1, and an air inlet 13 is formed at the center. Reference numeral 14 denotes a centrifugal blower disposed in the ventilation duct 10 corresponding to the suction port 13. Reference numeral 15 denotes a suction port 13 in the ventilation duct 10.
Is an electric heater arranged in an annular shape around the periphery of the electric heater. Reference numeral 16 denotes a fan guard fixed to the inner plate 11 with screws so as to cover the suction port 13. Reference numeral 18 denotes a temperature sensor for temperature control provided near the fan guard 16. The temperature sensor 18 is formed to be elongated by storing the thermocouple in a stainless steel cylinder. The temperature sensor 18 has one end fixed to the right side plate 9 of the inner box 3 by a screw at the other end of a mounting bracket 21 having an L-shaped cross section. Here, a regulation part 23 projecting into the ventilation duct 10 is formed in a part of the fan guard 16 by bending a wire, and the temperature sensor 18 is configured to accommodate the central part in the regulation part 23. It is attached to. As a result, most of the temperature sensor 18 is located within the range of the suction port 13. At the right end of the outer box 2, there is provided a control device 24 for controlling the energization of the blower 14 and the electric heater 15 based on a signal from the temperature sensor 18 to control the inside of the constant temperature chamber 6 to a predetermined set temperature. Built-in. Reference numeral 25 denotes a display panel for displaying the set temperature and the internal temperature, and 26 denotes an operation panel such as an operation switch and a temperature setting switch.

As shown in FIG. 2, the outlet 12 is formed in a substantially triangular shape which is point-symmetric with each other at the upper and lower ends of the inner plate 11.

In the thermostatic apparatus configured as described above,
When the operation switch of the operation panel 26 is turned on and the operation is started, the electric heater 15 and the blower 14 are operated, and the air heated in the ventilation duct 10 is supplied from the air outlets 12 at the upper and lower ends of the inner plate 11 into the constant temperature chamber 6. At the same time as the air is blown out, the air is sucked in from the suction port 13 and the heated air is circulated in the constant temperature chamber 6. At this time, the electric heater 15 and the blower 14
Based on the signal detected by the temperature sensor 18, the controller 24 controls the energization so that the inside of the constant temperature chamber 6 has a preset temperature.

The upper and lower ends of the inner plate 11 are formed with substantially triangular outlets 12 which are point-symmetric with respect to each other.
In the width direction 1, the blowout air volume is limited because the opening area is small at the outlet 12 </ b> B where the airflow from the blower 14 is large, while the opening area is small at the outlet 12 </ b> A where the airflow from the blower 14 is small. Is large, the entire air volume is blown out.
Is continuously adjusted in the width direction, so that the air blown out from the outlet 12 into the constant temperature chamber 6 has a uniform laminar flow in the width direction. Therefore, with a simple configuration in which the upper and lower ends of the inner plate 11 are cut obliquely to form the air outlets 12, the temperature distribution in the constant temperature chamber 6 can be made uniform, and miniaturization of the apparatus is promoted. It is possible to provide the constant temperature device 1 that can obtain stable temperature control while being stable.

The temperature sensor 18 has one end fixed to the other end of an L-shaped mounting bracket 21 fixed to the right side plate 9 of the inner box 3 by a screw. Since the temperature sensor 18 is housed in the restricting portion 23 formed by bending the sensor 1, even if the temperature sensor 18 is a relatively long and thin cylindrical member, the sensor 1
8 can be fixed to the right side plate 9 of the inner box 3 via the mounting bracket 21, while the other end, which is a free end, is accommodated in the regulating portion 23 of the fan guard 16. As a result, it is possible to prevent the free end of the elongated sensor 18 from falling down, and to reduce the number of parts and simplify the mounting operation while using the fixing bracket 21 of the sensor 18 as only one end.
8 can be arranged in the vicinity of the suction port 13, and the accuracy of temperature control can be improved.

[0013]

As described above, according to the constant temperature apparatus of the present invention, the upper and lower ends of the inner plate are formed with substantially triangular air outlets which are point-symmetric with respect to each other. While the opening area is reduced at the outlet on the side where the amount of air is large to limit the amount of air blown out, the entire area can be blown out by increasing the opening area at the outlet on the side where the amount of air from the blower is small. Since the restriction on the amount of blown air can be continuously adjusted in the width direction of the inner plate, the air blown out from the outlet into the constant temperature chamber can be made into a uniform laminar flow in the width direction. As a result, with a simple configuration in which the upper and lower ends of the inner plate are cut obliquely to form an air outlet, the temperature distribution in the constant temperature chamber can be made uniform, and a stable temperature can be achieved while promoting miniaturization of the apparatus. It is possible to provide a constant temperature device with which control can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a thermostat of the present invention.

FIG. 2 is a side view of a main part of the thermostat.

FIG. 3 is a sectional view of a main part of the thermostat.

FIG. 4 is a plan sectional view of a main part of the thermostat.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 constant temperature device 3 inner box 6 constant temperature room 9 right side plate 10 ventilation duct 11 inner plate 12 outlet 13 suction port 14 blower 18 temperature sensor

Claims (1)

(57) [Claims] 1. An air outlet and a suction port provided in an inner plate forming a constant temperature chamber, a heating means, a blower and a temperature sensor provided in a ventilation path in the inner plate, and a signal from the temperature sensor. A control device for controlling the heating means and the blower to control the temperature of the constant temperature chamber to a predetermined temperature based on a suction port formed in the center of the inner plate, and at the upper and lower ends of the inner plate. A thermostatic apparatus characterized by forming substantially triangular outlets that are point-symmetric to each other.