JPH01284254A - Warming device - Google Patents

Abstract

PURPOSE:To shorten the realization time to a set temperature by reducing the temperature difference of a heated article by installing a circulation means which introduces the air heated by a heating means into a warming chamber and allows said warm air to circulate and a selecting means for selecting the flow direction of the heated air which circulates in the warming chamber. CONSTITUTION:When a selecting damper 4 is at the positions 4a and 4c, the warm air generated by a heater 3 and blower 2 flows from the opened port part 8a of a warming chamber 8, and blows out from the passage hole 9a on a floor 9, and passes through mats 30, and is discharged into the air from an opened hole 5 through a duct 6, passing through a passage hole 10a. A portion of the warm air is mixed with the air which flows from an outside air taking-in port 7a from the opened port part 8a, and sent into the blower 2. When a lower part temperature sensor 25 senses the temperature of the death of wall louse of 45 deg.C, the selecting damper 4 is turned by 90 deg., and stops at the positions 4b and 4d. The warm air flows into the duct 6, and blows out from the passage hole 10a on a ceiling 10, and then passes through the mats 30, and a reverse stream passing through the passage hole 9a on the floor 9 is generated, and when the upper part temperature sensor 25 detects a temperature of 45 deg.C, the generation and flow of the warm air are suspended.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heating device used for heating and sterilizing tatami mats.

[Conventional technology]

As a conventional sentencing heat/sterilization device,
As disclosed in No. 9, a sentencing greenhouse is installed in the loading platform of a vehicle, a combustion type heater is used as a heat source to generate warm air, and the warm air is introduced into the heating chamber and circulated. There is a hot air heating method that heats and sterilizes tatami mats.

[Problem to be solved by the invention]

In recent years, with the spread of home air conditioners, the frequency of natural drying of tatami mats has decreased, making it easier for wall insects to infest the inside of tatami mats.

However, in the conventional hot air heating method, since tatami mats have great insulation properties, it takes time to raise the temperature of the tatami core above 45°C, the temperature at which wall insects die. Since the flow of hot air is unidirectional, the heating temperature is not uniform depending on the area of the tatami, so it is difficult to quickly heat a large number of tatami mats at once to a uniform temperature to perform wall-〇 sterilization treatment.

For example, in the conventional hot air heating type underfloor blowout type, the 8th
As shown in the figure, the core temperature of the upper part of the tatami rises slower than the core temperature of the lower part of the tatami, and about 40 minutes after the start of operation, the core temperature of the lower part of the tatami reaches the death temperature of the wall, 45°C. It takes about 90 minutes for the core temperature of the upper part of the tatami to rise, which causes the wall insect sterilization process to take longer. On the other hand, when the core temperature of the upper part of the tatami reaches the death temperature of wall insects, 45°C, the core temperature of the lower part of the tatami reaches nearly 70°C, which is undesirable because it accelerates the deterioration of the material of the tatami.

The present invention was made in view of the above-mentioned circumstances, and by reversing the flow direction of the warm air circulating inside the heating chamber halfway, the temperature difference between parts of the object to be heated is reduced. The object of the present invention is to provide a heating device that takes a short time to reach a set temperature.

[Means to solve the problem]

In order to achieve the above object, the present invention provides: (1) a heating chamber; a heating means for heating air; a circulation means for introducing and circulating the air heated by the heating means into the heating chamber; The heating apparatus further includes a switching means for switching the flow direction of the heated air circulating in the heating chamber by the circulation means.

(2) Note that it is convenient and desirable for the above switching means to be performed by one switching damper.

[Effect]

By configuring as above, the downstream part where the temperature rises slowly relative to the flow direction of the hot air becomes reversed from the middle, and the temperature rises slowly relative to the flow direction of the hot air. Since the temperature is the same as that of the upstream portion, and the temperature rises quickly, the time required is shortened, and the temperature difference between the upstream portion and the downstream portion is also reduced.

This relationship can be expressed in terms of the temperature rise characteristics of the core temperature of the upper and lower parts of the tatami shown in Figure 9. When the core temperature of the lower part of the tatami reaches the set temperature T'C (the temperature at which wall insects die), the warm air is If the flow direction is reversed, the downstream part (upper tatami) of the hot air flow direction will have a temperature rise curve of A', and the upstream part (lower tatami) will have a temperature rise curve of B.
’ temperature rise curve. Therefore, the time to reach the set temperature T″C is shortened from t to t2 as shown in the figure, and the temperature difference between the upstream and downstream parts is reduced from d to d2.

〔Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the heating device of the present invention.
is an air mixing damper which mixes the air flowing in from the outside air intake lower a with the warm air discharged from the heating chamber 8 to the duct 7. 2 is a blower for blowing air; 3 is a combustion type heater; air heated by the combustion type heater 3 is supplied with air mixed by the mixing damper 1 by the blower 2, and becomes hot air. Reference numeral 4 denotes a hot air switching damper provided on the downstream side of the combustion type heater 3, which can be reversed by 90 degrees as shown in the figure. Reference numeral 5 indicates an open hole to the outside air provided for blowing out hot air. 6 is a duct that flows hot air,
The openings 8a and 8 of the heating chamber 8 are connected via the switching damper 4.
b.

7 is a duct that also flows warm air, and is connected to the opening 8c of the heating chamber 8.
and the above-mentioned mixing damper 1, and a portion of the warm air circulating in the heating chamber 8 flows into the mixing damper 1 through the duct 7 from the opening 8c. The heating room 8 is formed with a floor 9 having hot air passage holes 9a and a ceiling 1o having hot air passage holes 10a, and tatami mats 30 are arranged on the floor 9.

Reference numeral 25 denotes a temperature sensor for measuring the core temperature of the tatami mat 30, which is installed on the upper and lower sides of the tatami mat 30, respectively.

FIG. 2(a) is a sectional view of the heating device shown in FIG. 1 viewed from above, in which 21 is the motor of the mixing damper 1, 22 is the motor of the switching damper 4, and 24 is a metal pipe, for example. These insertion guides are bent into a U-shape and are installed and fixed in a row horizontally in the heating chamber 8.
are inserted and arranged.

FIG. 2(b) is a sectional view of the heating chamber 8 of FIG. 1 viewed from the side, and the tatami mat 30 is inserted and fixed into the guide 24 as shown in the figure.

Fig. 3 is a perspective view of the heating device shown in Fig. 1 installed on the cargo bed of a car, in which the switching damper 4 is attached to the rear of the combustion heater 3, and the switching damper motor 22 and the open hole 5 for hot air blowout are attached to the side of the switching damper 4. is provided. Note that 23 is a box containing an electric control circuit to be described later.

FIG. 4 is a perspective view of the switching damper 4 located at the back of the switching damper motor 22 in FIG.
The rotation is transmitted to the link 27 and the link 27 moves, thereby rotating the shaft 26 of the switching damper 4, so that the switching damper 4 is rotationally driven.

Next, FIG. 5 shows an electric circuit of the heating device of the present invention. In FIG. 5, 11 is a power source battery, 12 is an operation switch, 13 is a heater relay having a contact 13a, 14 is a blower motor relay having a contact 14a, and 15 is a contact 1.
5a, and 16 and 17 are switching damper motor relays with double contacts 16a and 17a, which are connected in parallel to the battery 11 and connected to the control circuit 20, and housed in the box 23. ing. Note that a temperature sensor 25 is connected to the control circuit 20. The contact 13a is connected to the combustion heater 3, and the contact 1
4a is connected to the blower motor 2, contact 15a is connected to the mixing damper motor 21, and double contacts 16a and 17a are connected with opposite polarities to the switching damper motor 22, respectively, to form an electric circuit.

Next, the operation of the heating device of the present invention will be explained based on the electric circuit diagram shown in FIG. 5 and the embodiment diagrams shown in FIGS. 6 and 7.

First, when the operation switch 12 is turned on, the heater relay 13. Since the blower motor relay 14 and the mixing damper motor relay 15 are energized, the contact 13a closes and the combustion heater 3 operates to start combustion, the contact 14a closes and the blower 2 starts rotating, and the contact 15a closes to start mixing. The rotation of the damper motor 21 opens the mixing damper 1 to the position shown by the dotted line. In this case, since the switching dampers 4 are at positions 4a and 40 as shown in FIG. 6, the hot air generated by the combustion of the combustion heater 3 and the operation of the blower 2 is
As shown by the arrow, it flows into the opening 8a of the heating chamber 8, blows out through the passage hole 9a in the floor 9, passes between the tatami mats 30, passes through the passage hole 10a in the ceiling 10, and exits the opening 8b of the heating chamber 8. It is discharged into the atmosphere from the open hole 5 through the duct 6. On the other hand, a part of the warm air passing between the tatami mats 30 reaches the mixing damper 1 from the opening 8c of the heating chamber 8 through the duct 7 as shown by the arrow, and mixes with the air flowing in from the outside air intake lower a. and sent to blower 2.

After that, when the temperature sensor 25 mounted on the lower side of the tatami mat 30 detects the death temperature of wall insects, 45°C, the switching damper motor relay 16 is energized by an instruction from the control circuit 20, so that the contact 16a changes from 16a+ to 16at, and the switching damper motor 22 starts rotating. The rotation of the switching damper motor 22 is transmitted to the link 27 as described above, and the switching damper 4 is driven to rotate through 90 degrees, and stops at positions 4b and 4d as shown in FIG. Therefore, the warm air flows into the duct 6 as shown by the arrow, flows into the opening 8b of the heating chamber 8, blows out from the passage hole 10a in the ceiling 10, passes between the tatami mats 30, and passes through the passage hole 9a in the floor 9. The hot air flows in the opposite direction and is discharged into the atmosphere from the open hole 5 through the opening 8a of the heating chamber 8. On the other hand, a part of the warm air passing between the tatami mats 30 reaches the mixing damper 1 from the opening 8c of the heating chamber 8 through the duct 7 as before, as shown by the arrow, and flows in from the outside air intake lower a. It is mixed with air and sent to blower 2.

After that, when the temperature sensor 25 mounted on the upper side of the tatami mat 30 detects the death temperature of wall insects, 45°C, the control circuit 20 instructs the heater relay 13°, the blower motor relay 14, and the mixing damper motor relay 15. Since the current is turned off, the contacts 13a, 14a, and 15a open, the combustion heater 3 stops burning, the blower 2 stops rotating, the mixing damper 1 closes, and the generation and flow of hot air stop. On the other hand, the switching damper motor relay is energized from 16 to 17, the relay contact 17a is switched from 17a+ to 17a2, and a reverse voltage is applied to the switching damper motor 22, so the switching damper motor 22 is reversed and the link 27 is As a result, the switching damper 4 is driven to reverse rotation by 90 degrees and returns to the original positions of 4a and 40 as shown in FIG.

As shown in FIG. 7, while the flow of hot air is heating from the ceiling 10 to the floor 9, the temperature sensor 25 located at the bottom of the tatami 30 detects the core temperature of the tatami 30 due to the opening and closing of the door, etc. When the temperature drops below 45°C, the control circuit 20 instructs the switching damper motor relay to switch its energization from 16 to 17, and as described above, the switching damper motor relay 22 reverses and the switching damper 4 moves to 90°. As the tatami mats 30 are rotated in the opposite direction and return to their original positions as shown in FIG. After heating in this state until the temperature reaches °C, the flow direction of the hot air is switched again and heating is started.

Next, in this embodiment, the tatami mats are arranged standing up on the floor in the heating room, but the tatami mats may be stacked horizontally parallel to the floor with gaps between them. In this case, temperature sensors may be installed on the top tatami mat and the bottom tatami mat, respectively, and the hot air flow direction may be switched in the same way as described above.

Note that in this embodiment, a combustion type motor and a blower are used.

Although the switching dampers and the like were all operated by instructions from the control circuit, these operations may also be carried out by manual switch operations.

Further, in this embodiment, the flow direction of the hot air is switched when the core temperature of the tatami reaches the set temperature, but the switch may be performed by setting a time corresponding to the set temperature. Note that the flow direction of the hot air does not necessarily have to be switched to the opposite direction, and it is desirable to switch the flow direction to the optimal flow direction in relation to the hot air blowing position.

Furthermore, in this example, heating and sterilization of tatami mats has been described, but if the heated object is heated with hot air flowing in one direction, temperature differences will occur depending on the part, and such temperature differences cannot be ignored. It can be applied to anything.

〔Effect of the invention〕

As detailed above, the heating device of the present invention has the following advantages: (1) Since the time required to reach the set temperature is short, the heating processing capacity is dramatically improved, and the energy consumption required for heating is also greatly reduced. do.

Since the temperature difference between parts of the heated object is small, material deterioration due to overheating is prevented.

It has great practical effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, FIG. 2(a)
, (b) is a cross-sectional view of the top and side surfaces of Figure 1, Figure 3 is a perspective view of the same vehicle, Figure 4 is a perspective view of the same part, Figure 5 is the electric circuit diagram of Figure 1, 6 and 7 are schematic diagrams showing the same operation, FIG. 8 is a conventional temperature increase diagram, and FIG. 9 is a temperature increase diagram showing the effect of the present invention. 2...Prower, 3...Combustion type heater 24...Switching damper, 6.7...Duct, 8...Heating chamber. Duct Figure 1 Figure 4

Claims (2)

[Claims] (1) a heating chamber; a heating means for heating air; a circulation means for introducing and circulating the air heated by the heating means into the heating chamber; and a heated air circulating within the heating chamber by the circulation means. A heating device comprising: switching means for switching the flow direction of the air. (2) The heating device according to claim 1, wherein the switching means is performed by one switching damper.