JPH119394A - Warm air supplier for bedding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a warm air supplier for bedding with which a comfortable sleeping environment can be always prepared by making the temperature of warm air blown from a warm air blowing port coincident with a set temperature with high accuracy. SOLUTION: Inside a case 1 with which an air intake port 11 and the warm air blowing port are formed, a heater 3 and a blower 4 are provided successively from the side of the air intake port 11, a temperature sensor 5 is arranged near or on the downstream side of a discharging port of that blower 4 and while using the output of the temperature sensor 5, the heater is controlled. Thus, since the temperature sensor 5 is provided inside the passage of warm air heated by the heater 3 and uniformed in temperature distribution by being sufficiently stirred by the blower 4 later, accuracy in the temperature detection of warm air is improved and the warm air temperature can be exactly controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air supply device for a futon for supplying hot air to an air passage formed in a futon, a futon, a bed mat or a futon mat at bedtime. About.

[0002]

2. Description of the Related Art A futon dryer is conventionally known as a device for drying a futon or a mattress. The futon dryer generally dries both by supplying warm air between the futon and the bedding when not in bed.

[0003] By applying such a futon dryer, conventionally, an air passage is formed in a futon such as a feather futon, and warm air is supplied to the air passage at the time of sleeping, so that the temperature at the time of sleeping can be improved. There is known a so-called air control futon or the like which appropriately adjusts the humidity and humidity (for example, see Japanese Patent No. 2616893).

[0004] By the way, the hot air supply device in the conventional futon dryer and the air control futon as described above,
In general, a blower and a heater are arranged in order from the air intake side in a case in which an air intake and a hot air outlet are formed, and the air discharged from the blower is heated by applying the air to the heater to blow it out as hot air. It has a simple structure.
The temperature control of the hot air is performed by disposing a temperature sensor near the hot air outlet and providing a circuit for controlling the heater on / off so that the temperature detection result matches the set temperature.

[0005]

However, in the above-described conventional hot air supply device, the temperature control of the blown hot air is not good. However, according to the air-control futon using such a hot-air supply device, a problem arises in that a hot air having a temperature different from the set temperature is frequently supplied at bedtime, and a comfortable sleeping environment cannot be realized. was there.

The present invention has been made in view of such circumstances, and the temperature of the hot air blown from the hot air outlet can be made to match the set temperature with high accuracy, so that it is always comfortable. It aims to provide a hot air supply device for futons that can create a sleeping environment.

[0007]

In order to achieve the above object, a hot air supply device for a futon according to the present invention comprises an air passage formed in a bed, a futon, a bed mat or a futon mat. In contrast, a hot air supply device for supplying hot air, in a case provided with an air intake and a hot air outlet, a heater and a blower are arranged in order from the air intake side, A temperature sensor is arranged near or downstream of the discharge port of the blower, and is provided with a control circuit for controlling the heater based on the output of the temperature sensor.

In the hot air supply for futon according to the present invention, the control circuit includes a feedback control circuit for driving and controlling the heater based on a deviation signal between the temperature set by the temperature setting device and the temperature detection result by the temperature sensor. It is preferable that゛ The present invention does not apply the air discharged from the blower to the heater to heat it as in the conventional hot air supply device of this type, but instead sucks and discharges the air heated by the heater with the blower, It is intended to achieve the intended purpose by making the spatial temperature distribution of the blown hot air uniform.

[0009] In this type of conventional hot air supply device, the cause of poor control accuracy of the discharged hot air temperature is the presence of uneven spatial temperature of the air heated by the heater. That is, in the method of heating by applying the airflow formed by the blower to the heater, the temperature unevenness of the air based on the shape of the heater is large, and the position of the temperature sensor for detecting the temperature of the hot air is slightly reduced on the downstream side. By changing
It has been found from the study of the present inventors that the detection output changes considerably. Therefore, in this type of conventional hot air supply device, the output of the temperature sensor for detecting the temperature of the hot air does not represent the actual average temperature of the hot air, but the output of the temperature sensor Even if the heater is turned on and off using the above, the hot air blown out does not reach the set temperature.

On the other hand, in the hot air supply device for futon according to the present invention, the air heated by the heater is sucked and blown out by the blower, so that the heated air is uniformly stirred by the blower. Since it passes through the temperature sensor, its temperature detection output is always a value that correctly represents the average temperature of the hot air. Therefore, by controlling the heater using the output of the temperature sensor, the temperature of the hot air always becomes equal to or very close to the set temperature. Further, in the invention according to claim 2, it is possible to finely control the temperature of the hot air by performing feedback control of the heater using an accurate temperature detection output obtained under the above configuration. Even if there is a change in environmental temperature or the like, it is possible to always supply hot air at a temperature very close to the set temperature, and a comfortable sleeping environment can be obtained.

Although the present invention is directed to a hot air supply device for futons, the present invention is equally applicable to bed mats, futon mats and the like, in addition to hanging futons and mattresses. Also,
In the present invention, when the temperature sensor is disposed in the case, the temperature sensor is located near the discharge port of the blower. However, the temperature sensor may be disposed in a hose for blowing hot air communicating with the discharge port of the blower. In short, the point is that there is no particular limitation as long as it is a position through which the warm air discharged from the blower passes and the temperature of the warm air can be detected.

[0012]

FIG. 1 is a longitudinal sectional view showing an internal main structure of an embodiment of the present invention, FIG. 2 is a transverse sectional view showing the same internal main structure, and FIG. It is AA sectional drawing of. In each of these drawings, illustration of components not related to the features of the present invention is omitted.

The case 1 is a resin molded body, and has a lattice-shaped air intake port 11 formed at one end thereof.
A warm air outlet 12 is provided on the side. Case 1
Inside, an air filter 2, a heater 3 and a blower 4 are housed.

The heater 3 is a general-purpose heater such as a nichrome wire, for example, and has a structure wound around a cross-shaped winding frame 31 for a plurality of turns at predetermined intervals.

The blower 4 is a sirocco fan type blower, and has a suction port 41a formed in the side of the casing 41.
The air sucked from the outlet can be discharged from the discharge port 41b. The above-described heater 3 is arranged adjacent to the suction port 41 a of the blower 4. Further, a temperature sensor 5 is disposed at the discharge port 41b of the blower 4.

A hot air outlet 12 of the case 1 is provided with a hose receiver 6 for connecting to a futon, a mat, or the like to which hot air is to be supplied.
Of the nozzle 41b. The hose having one end attached to the hose receiver 6 is connected to a hose receiver provided on a permeable bedding or mat or the like at the other end. That is,
The embodiment of the present invention is provided with a hose receiver to which a hose for supplying hot air can be attached, and a futon having a ventilation path communicating with the hose receiver, a futon, a futon, or The hot air supply device is used to supply hot air to a bed mat or the like at bedtime, but the form of the futon or mat to which the hot air is supplied is not particularly limited.

The heater 3 is feedback-controlled by a temperature control circuit shown in FIG. That is, the output of the temperature sensor 5 is digitized by the A / D converter 71 and then taken into the microcomputer 72. Microcomputer 72
Is also supplied with a temperature set value signal from the temperature setter 73, compares the temperature set value with the temperature data from the A / D converter 71, and outputs the bidirectional signal The gate signal to be supplied to the gate terminal G of the terminal thyristor (trade name: TRIAC) 74 is changed. Interactivity 3
The terminal thyristor 74 has a heater 3 at its second terminal T2.
Of the first terminal T1 and the heater 3
A commercial AC power supply 80 is connected between the other ends.

The microcomputer 72 sets the temperature set value by the temperature setter 73 as a target value, and connects the gate terminal G of the bidirectional three-terminal thyristor 74 to the target value so that the temperature detected value by the temperature sensor 5 matches. The conduction angle of the AC power signal flowing through the heater 3 is feedback-controlled by changing the gate signal to be supplied.

According to the above embodiment, when the heater 3 and the blower 4 are both driven, the blower 4
The air introduced into the case 1 from the air intake 11 of the case 1 by the suction force of the case 1 is guided to the heater 3 via the filter 2 and is heated.
a, and is blown out of the warm air outlet 12 through the hose receiver 6 through the outlet 41b. At this time,
The air heated by passing through the heater 3 is sufficiently stirred by the blower 4 and then becomes warm air and is discharged from the discharge port 41b. The detection output is a value that always represents the average temperature of the hot air discharged from the blower 4, and the temperature distribution of the hot air is uniform even if the mounting position of the temperature sensor 5 is slightly changed. No error is included in the detected temperature value.

Since the power supplied to the heater 3 is feedback-controlled using the temperature data thus accurately selected, the hose receiver 6 of the hot air outlet 12 is controlled.
The temperature of the warm air supplied from the air always exactly matches the set temperature.

Accordingly, through one end of the hose attached to the hose receiver 6, a breathable futon, a mattress,
By connecting a bedding or a bed mat,
Warm air which exactly matches the set temperature is always supplied to the bedding or the mat.

In the embodiment of the present invention, when it is not particularly necessary to supply hot air in summer or the like, the driving of the heater 3 may be stopped and only the blowing function by the blower 4 may be used. Of course.

In the above embodiment, the temperature setting device 73 is used to set the hot air temperature. However, the design temperature may be arbitrarily changed by the microcomputer 72 over time. However, since the output of the temperature sensor 5 accurately represents the temperature of the hot air, the heater 3 always accurately follows the set temperature every moment.

Further, in the above embodiment, an example in which the drive control of the heater 3 is performed by the feedback control has been described. However, the present invention is not particularly limited to the feedback control. 5, the temperature detection output is always accurate, so that it is possible to realize better hot air temperature control than before.

[0025]

As described above, according to the present invention, since the heater, the blower, and the temperature sensor are arranged in this order from the air intake side of the case, when the heater and the blower are driven together, the heater is used. Since the heated air is sucked and discharged by the blower, the warm air passing through the temperature sensor is sufficiently stirred and the temperature distribution becomes uniform,
The temperature detection output by the temperature sensor always represents the average temperature of the hot air. Therefore, by controlling the driving of the heater using the output of the temperature sensor, the warm air blown out from the air outlet through the hose always matches or is very close to the set temperature.

When the power supplied to the heater is feedback-controlled using the outputs of the temperature sensors arranged as described above, the temperature of the hot air can be set more finely even when environmental conditions such as the outside air temperature change. It will match the temperature,
It is possible to always create a comfortable sleeping environment.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main structure of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a main structure of the embodiment of the present invention.

FIG. 3 is a sectional view taken along the line AA in FIG. 1;

FIG. 4 is a main part configuration diagram of a temperature control circuit according to the embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 11 Air intake 12 Hot air outlet 2 Filter 3 Heater 4 Blower 41 Casing 41a Suction port 41b Discharge port 5 Temperature sensor 6 Hose receiver 71 A / D converter 72 Microcomputer 73 Temperature setting device 74 Bidirectional 3 terminal Thyristor 80 commercial AC power supply

Claims (2)

[Claims] Claims 1. An air passage formed in a bed mat, a bed mat, a bed mat, a futon mat, or the like.
A heater and a blower are arranged in order from the air intake side in a case provided with an air intake and a hot air outlet, and a heater for supplying hot air. A hot air supply device for a futon, wherein a temperature sensor is disposed near an outlet or downstream of the outlet, and a control circuit for controlling the heater based on an output of the temperature sensor is provided. 2. The feedback control circuit according to claim 1, wherein the control circuit is a feedback control circuit that drives and controls the heater based on a deviation signal between a temperature set by a temperature setting device and a temperature detection result by the temperature sensor. 2. The hot air supply device for futon according to 1.