JP3447195B2 - Method and apparatus for controlling inner surface heating of heat insulating bottle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner surface heating that can be suitably used for drying the inner surface of a heat insulating container (hereinafter referred to as a bottle) such as a picnic bottle, a lunch jar, etc., or for baking or firing a paint. A method and an apparatus thereof.

[0002]

2. Description of the Related Art Conventionally, heat treatment of this type of heat-insulating bottle product has been performed by blowing hot air from the opening of the bottle or inserting a heating element into the bottle.

[0003]

However, in the hot air blowing method, it is difficult to control the temperature of the hot air, and at the same time,
The hot air does not go all the way to the part near the bottom of the bottle, so overheated and underheated parts occur,
There was a problem that the quality became unstable.

Further, in the case of the heating element insertion method, it is necessary to control the temperature of the heating element for each bottle, so the management is troublesome and the cost is high, and the air flow in the bottle is small. However, there is a problem in that temperature unevenness easily occurs.

Therefore, the present invention has been made by paying attention to the problems of the prior art as described above, and allows hot air whose temperature is accurately controlled to a constant temperature to be evenly distributed to the bottom of the bottle. Detects that the internal temperature has reached a predetermined temperature and heats it quickly by limiting the introduction of hot air after that, while at the same time detecting that it has been heated reliably and improving the quality, excessive heating It is an object of the present invention to provide a method for controlling the inner surface heating of a heat insulating bottle and a device therefor for preventing the waste of energy.

[0006]

In order to achieve the above object, the invention of the method for controlling the inner surface heating of a heat insulating bottle according to claim 1 is a heat insulating bottle at the opening of a hot air container for supplying hot air at a predetermined temperature. Are airtightly connected, and the hot air in the hot air container is flowed into the heat insulating bottle by sucking through the suction pipe inserted into the bottle from the connected opening, and the temperature in the bottle reaches a predetermined value set in advance. When it reaches, the suction amount of hot air is reduced or suction is stopped and held for a predetermined time, after which the bottle is removed and cooled.

Further, the invention of an inner surface heating device for a heat insulating bottle according to claim 2 is a hot air container provided with a heating means and a temperature adjusting means and having an opening for hermetically connecting the heat insulating bottle, and one end of which is the opening. A suction pipe that is inserted into the heat insulating container so that it can be inserted into the heat insulating bottle and that is disposed in the hot air container so as to be inserted into the heat insulating container; an exhaust unit connected to the other end of the suction pipe; and an intermediate portion of the suction pipe. Flow meter and motorized valve,
It is characterized by further comprising: a temperature sensor attached to the suction pipe protruding from the opening; and a heating control means for the inner surface of the bottle, which receives a signal from the temperature sensor to control the opening degree of the electrically operated valve.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view schematically showing an outline of an embodiment of an inner surface heating device for a heat insulating bottle. In the figure, 1 is a hot air container that forms the body of the inner surface heating device,
It has a heat insulating structure, and an electric heater 2 is installed therein as a heating means. Further, in order to adjust the internal temperature of the hot air container 1, a temperature adjusting means 4 including a temperature detecting means (here, a thermocouple) 3 such as a thermocouple and a thermistor and a temperature controller 4.
A is installed. The electric heater 2 and the thermocouple 3 are connected via a temperature controller 4, and by performing feedback control using a preset temperature (for example, an arbitrary temperature in the range of 100 ° C to 500 ° C) as a target value, the electric heater 2 The heater 2 is turned on / off to maintain the temperature inside the hot air container 1 at a predetermined temperature.

On the upper surface 1a of the hot air container 1, a heat insulating bottle which is an object to be heated, such as a picnic bottle (hereinafter,
A plurality of openings 5 for connecting W (called bottles) are opened. A seal 6 made of heat-resistant ceramic fiber or rubber is attached to the edge of the opening 5 so as to prevent outside air from entering between the bottle W and the hot air container 1 when the bottle W is connected. is there. The opening 5 is not always limited to the upper surface 1a of the hot air container, but may be provided on another wall surface such as the side surface 1b of the hot air container. However, when handling the bottle W in a state where water droplets are attached to the inner wall, if the bottle W is provided on the upper surface 1a, the bottle W may be opened.
This is convenient because water droplets are easily separated and fall into the hot air container 1 when mounted on the.

In the hot air container 1, a number of suction pipes 7 corresponding to the number of the openings 5 are further arranged, and one end of the suction pipes 7 projects outside from the openings 5. The protruding length is set to be within 1/3 of the height of the bottle W mounted in the opening 5 and not in contact with the bottle bottom surface Wa. 1 / height of bottle W
When it is less than 3, hot air is sucked and discharged before reaching the bottom surface Wa of the bottle W when sucked through the suction pipe 7, and the temperature distribution in the bottle tends to be non-uniform. On the other hand, if the tip of the suction pipe 7 comes into contact with the bottom surface Wa of the bottle, suction and exhaust inside the bottle cannot be performed. It is preferable that the tip of the suction tube 7 is as high as possible within the range where it does not contact the bottle bottom Wa. The tip of the suction pipe 7 may be spread out in a trumpet shape having a size that allows it to pass through the mouth of the bottle, and the entire bottom surface Wa of the bottle may contact the flow of hot air as much as possible.

The other end of the suction pipe 7 is connected to the wall surface 1b of the hot air container 1.
Is connected to a blower or an exhaust pump that is the exhaust means 8. A flow meter 10 and a motor-operated valve 11 are provided in the middle of the suction pipe 7 connected to the blower 8 which is the exhaust means. Further, for example, the thermocouple 12 as a temperature sensor that detects the temperature in the bottle W is
It is provided alongside the suction tube 7 protruding from the opening 5. The tip of the thermocouple 12 is 1/3 of the height of the bottle W.
The above is set up so that it may not come into contact with the bottom surface Wa of the bottle.

The thermocouple 12 which is the temperature sensor in the bottle.
Is input to the control device 13 which is a heating control means for controlling the heating of the inside of the bottle W by controlling the opening degree of the electric valve 11, and the opening degree control signal from the control device 13 to the electric valve 11 is inputted. Is output.

Next, a method of controlling the inner surface heating of the bottle W by the inner surface heating device will be described. First, the required temperature in the hot air container 1 is set in advance in the temperature controller 4 according to the processing purpose of the bottle W such as drying, baking of coating, or baking. Further, in order to control the opening degree of the electric valve 11 according to the temperature detected by the thermocouple 12 in the bottle W,
The operation start temperature of the motor-operated valve 11 and the operation mode, that is, the degree of throttle of the motor-operated valve (including fully closed) are set in the heating controller 13. Furthermore, the fully open flow rate of the hot air to be sucked is set in the flow meter 10 so that the heating rate in the bottle becomes uniform.

When the above preparation is completed, the electric heater 2 is energized to raise the temperature in the hot air container 1 to the set temperature. Next, the bottle W whose inner surface is to be heated is attached to the opening 5 of the hot air container 1. At this time, the mouth of the bottle W is attached in close contact with the seal 6.

Subsequently, the blower (exhaust means) 8 is started to suck the gas in the bottle W through the suction pipe 7. By this suction, the hot air in the hot air container 1 at a constant temperature is transferred to the bottle W.
It flows into the inside and spreads to the bottom surface Wa of the bottle. The temperature inside the bottle W is detected every moment by the thermocouple 12 and sent to the heating control device 13. Since the bottle W is a heat insulating bottle, the temperature rises as the air initially present in the bottle is replaced with hot air, and reaches the set temperature. Then, the operation signal of the motor-operated valve 11 is output from the heating control device 13, and the opening degree of the motor-operated valve 11 is adjusted according to a preset operation mode. The suction by the blower 8 decreases as the opening degree of the motor-operated valve 11 is reduced, and the suction by the blower 8 is stopped when the valve is fully closed. Thereby, the introduction of hot air into the bottle W can be restricted.

In this way, by holding the state in which the suction in the bottle is reduced or stopped for a set time,
The inside of the bottle is kept at a uniform temperature for a predetermined time. Then, the bottle W is removed from the opening 5 and cooled.

Thus, according to this embodiment, the following various effects can be obtained. The hot air controlled to a constant temperature evenly flows to the bottom of the bottle, and the inner surface of the bottle can be heated evenly. Moreover, since the temperature inside the bottle is detected and confirmed and the amount of hot air to be sucked is adjusted to control the temperature inside the bottle, the heating temperature of the inner surface of the bottle W can be accurately maintained.

In some cases, the heating control device 13
By changing the temperature set to, the bottles W having different target temperatures can be heated in the same hot air container 1. It is also possible to introduce hot air having a temperature higher than the target temperature into the bottle W to heat the inside of the bottle to a predetermined temperature in a short time. Accordingly, for the purpose of drying, for example, the water on the inner surface of the bottle, including the water adhering to the bottom surface Wa of the bottle, can be evaporated and vaporized entirely rapidly, and can be dried extremely quickly.

Furthermore, since the gas in the bottle W is sucked and hot air is introduced into the bottle W, dirt such as water in the bottle W can be removed cleanly. Further, since the temperature of the hot air in the hot air container 1 is controlled, the heating temperature can be easily changed.

Since the temperature inside the bottle W is measured, it can be confirmed that the bottle W has been heated. Furthermore, when the inside of the bottle W has not reached a predetermined temperature, an alarm is issued so that automated work can be performed with peace of mind.

Moreover, since the hot air can be discharged to the outside of the room by the blower 8, there is no fear that the hot air will deteriorate the working environment. The heating means is not limited to the electric heater 2, and other known heating means such as a gas burner or a steam heater can be used.

[0022]

As described above, according to the present invention,
For example, when drying the inner surface of a heat-insulating bottle such as a picnic bottle or a lunch jar, baking the coating, baking treatment, etc., hot air whose temperature is controlled in advance while sucking through a suction tube inserted in the bottle is used. It is sent into the bottle, and when the inside of the bottle reaches a predetermined temperature, the suction is stopped or reduced and the temperature is maintained for a predetermined time, so that hot air controlled at a constant temperature is uniformly introduced to the bottom of the bottle, and quickly. There is an effect that the inner surface of the bottle is evenly heated and can be processed at an accurately controlled temperature.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing an embodiment of a heating device of the present invention.

[Explanation of symbols]

1 hot air container 2 heating means 3 Temperature measuring means 4 Temperature controller 5 openings 7 suction tube 8 exhaust means 10 Flowmeter 11 Motorized valve 12 Temperature sensor 13 Heating control means

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B05C 9/14 B05C 3/20 B05D 7/22 F26B 3/00

Claims (2)

(57) [Claims] 1. A heat-insulating bottle is hermetically connected to an opening of a hot-air container for supplying hot air at a predetermined temperature, and the hot air in the hot-air container is sucked through the suction pipe inserted into the bottle from the connected opening. Pour into an adiabatic bottle, and when the temperature in the bottle reaches a preset predetermined value, reduce the suction amount of hot air or stop suction and hold for a predetermined time, then remove the bottle and cool it A method for controlling inner surface heating of a heat insulating bottle, characterized by: 2. A hot air container provided with a heating means and a temperature control means and having an opening for airtightly connecting the heat insulating bottle, and one end projecting from the opening so as to be insertable into the heat insulating bottle attached to the opening. A suction pipe disposed in the hot air container, and an exhaust means connected to the other end of the suction pipe,
By controlling the opening degree of the motor-operated valve by receiving a signal from the flowmeter and the motor-operated valve interposed in the middle of the suction pipe, a temperature sensor installed in the suction pipe protruding from the opening, and a signal from the temperature sensor. An inner surface heating control device for a heat insulating bottle, comprising: a heating control means for the inner surface of the bottle.