JPH05215341A - Radiation type heater device - Google Patents

Abstract

PURPOSE:To enable an economical heating operation to be attained by a method wherein a heater inputting, value capable of getting an amount of radiation suitable for a human body at a location spaced apart by a distance is calculated from data about a room temperature and the distance. CONSTITUTION:A distance sensing part 12 converts an output of an ultrasonic wave sensor 3 into a digital signal acting as an inputting data of a distance L ranging from a heater 2 to a human body. A room temperature sensing part 13 converts an output from a temperature sensor 7 into a digital signal acting as an input data of a room temperature. A table for converting the amount of radiation suitable for a selected human body into a heater inputting value in response to a room temperature for every spaced-apart distance between the heater 2 and the human body is stored in advance in a heater input table 15. In this way, it becomes possible to perform a comfortable heating operation suitable for the human body more under a heater capability control responding to the distance from the heater as well as the room temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiant heater such as an electric heater and a reflection type electric stove belonging to a spot heater, and more particularly to temperature control based on room temperature and the amount of radiation received by the human body. The radiant heating device.

[0002]

2. Description of the Related Art The ideal heating method for the human body is to warm up quickly and then keep it in a comfortable zone. In the case of a radiant heater, it is necessary to increase the amount of heat generation in order to warm up quickly, but if this state is maintained, the surface temperature of the human body will become overheated and there is a high possibility of low-temperature burns. .. Therefore, with a manual adjustment function,
Means such as suppressing the amount of heat generation and controlling the heat generation capacity according to the room temperature after a lapse of a certain time after power-on can be considered. In Japanese Utility Model Application Laid-Open No. 62-141110, the energization time is updated every set time while detecting infrared rays emitted from a human body in a predetermined place from a heater and obtaining an output signal detecting the human body. A heating machine that operates is disclosed.

[0003]

However, the above means simply adjusts the amount of heat generation, and in particular, the above means that a person who is heated feels that the amount of superheat due to radiation is large. Therefore, it is not possible to say that good control of heating is achieved by keeping away from the heater naturally and suppressing the amount of heat generation over time. This method is also a control using only room temperature as an index, and when considering radiation, comfortable heating cannot be expected. That is, the condition that the human body feels comfortable heating is related to the amount of radiation received by the human body in addition to room temperature.

Further, the one disclosed in Japanese Utility Model Laid-Open No. 62-141110 merely detects the presence or absence of a person and controls the energizing time of the heater, and no consideration is given to comfortable heating. It is an object of the present invention to provide a radiant heater that controls a heater input taking into consideration not only the room temperature but also the amount of radiation to obtain a good heating feeling.

At the same time, it is an object of the present invention to perform economical heating by controlling the heater input.

[0006]

A radiant heater according to the present invention is a calculation means for calculating a heater input value for obtaining a radiation amount suitable for a human body selected according to a room temperature at a point separated by an arbitrary distance from the heater. It is equipped with. Here, the room temperature and the distance from the heater to the human body can be detected by various sensors.

The calculating means is a microcomputer and ROM
And the digital signal processor can be used.

[0008]

In the spot type heater, only by controlling the heat generation amount of the heater according to the room temperature, the temperature control can be carried out by ignoring the heating effect by radiation. Since the heating effect by radiation changes according to the distance when the heater heat generation amount is constant, in the present invention, the data of the distance from the heater to the human body is also added to the factor for controlling the heater heat generation amount. That is, the calculating means according to the present invention calculates the heater input value that obtains the radiation amount suitable for the human body at the point separated by the distance from the data of the room temperature and the distance. This allows
Even at the same room temperature, the heating value of the heater varies depending on the distance, and a local comfort zone is realized.

[0009]

【Example】

(Embodiment 1) Hereinafter, the present invention will be described in detail with reference to the drawings showing an embodiment. FIG. 1 is a block diagram showing an embodiment of a radiant heating apparatus according to the present invention, and FIG. 2 shows an appearance of a heating apparatus main body. As shown in FIG. 2, the heater to which the present invention is applied is of a spot type that is heated by a heater 2 attached to a main body 1. The heat generation amount of the heater 2 can be manually set by the adjusting knob 4 and can be changed by the heater input value set in the drive unit 5. Further, the main body 1 is provided with a temperature sensor 7 for detecting a room temperature and a distance measuring means using the ultrasonic sensor 3. In the present embodiment, the ultrasonic sensor 3 is provided with an oscillator and a receiver separately.

As shown in FIG. 1, the temperature sensor 7, the ultrasonic sensor 3, and the driving unit 5 serve as an input / output circuit of the computing means 11 for calculating the radiation amount suitable for the human body according to the present invention. There is. That is, the output of the ultrasonic sensor 3 is input to the calculating unit 11 via the distance detecting unit 12, and the output of the temperature sensor 7 is input to the calculating unit 11 via the room temperature detecting unit 13.

The distance detecting section 12 and the room temperature detecting section 13 are a sense amplifier for amplifying the input signal voltage and the amplified voltage are
A / D converter for A / D conversion, and distance detection unit 1
2 converts the output of the ultrasonic sensor 3 into a digital signal as input data of the distance L from the heater 2 to the human body 10,
The room temperature detector 12 converts the output of the temperature sensor 7 into a digital signal as room temperature input data. Computing means 1
1 comprises a central processing unit (CPU) 14 and a heater input table 15. As will be described later, the heater input table 15 stores a table for converting a radiation amount suitable for a human body selected according to room temperature into a heater input value for each discrete distance between the heater 2 and the human body 10. The heater input value obtained from the heater input table 15 is input to the heater power control circuit 16 of the drive unit 5 as the output of the calculation means 11. The heater power control circuit 16 is configured to generate a power output for driving the heater 2 as an output of the drive circuit 5 with a heat generation amount proportional to the heater input value.

FIG. 3 is an explanatory diagram showing the table written in the heater input table 15 in the form of a graph. In this table, the first quadrant I and the fourth quadrant IV share the vertical axis.
And the vertical axis represents the amount of radiation, the horizontal axis in the fourth quadrant IV represents room temperature input data, and the horizontal axis in the first quadrant I represents the heater input value. In the fourth quadrant IV, the relationship between the room temperature and the radiation amount, which is a comfortable zone for the human body, is plotted, and in the first quadrant I, the relationship between the radiation amount and the heater input value for each discrete distance from the heater 2 to the human body. Is plotted.

FIG. 4 shows a flowchart for calculating the heater input value according to the distance L from the heater 2 to the human body using the above table. At the beginning such as when the power is turned on, the calculation means 11 outputs ₀ as the initial heater input value H _{0 in} step S1. In the next step S2, the input data of the room temperature from the room temperature detection unit 13 in which the output of the temperature sensor 7 is converted into a data signal and the input data of the distance from the distance detection unit 12 in which the output of the ultrasonic sensor 3 is converted into a data signal are read. In step S3, the heater input table 15 is driven by using the input data of the room temperature as the horizontal axis data of the fourth quadrant IV in the table of FIG. 3, and the radiation amount of the comfort zone corresponding to the room temperature is determined from the relationship between the room temperature and the radiation amount. calculate. Then, in step S4, the heater input value for obtaining the radiation amount in the comfort zone is obtained at a point separated by the input data of the distance from the distance detection unit 12 based on the relationship between the radiation amount in the first quadrant I and the heater input value. To calculate. Specifically, the amount of radiation that gives a comfortable zone when the room temperature is 5 ° C. is calculated from the table in the fourth quadrant IV in the range of approximately 500 to 1000 (Kcal / m ² h). Furthermore, when the distance L from the heater 2 to the human body is 0.5 m at this room temperature, from the table having the same distance 0.5 m written in the first quadrant I as a parameter,
Heater input value H for obtaining the radiation amount that gives a comfortable zone when the room temperature is 5 ° C. at a point 0.5 m from the heater 2.
₁ is calculated in the range of approximately 0.5 to 2.75 (KW). In this case, whether the comfort zone is slightly hot or cold can be adjusted by, for example, the position of the adjusting knob 4. When the center of the comfort zone is selected by the adjusting knob 4, the heater input value 2 (KW) is calculated for the input data at room temperature of 5 ° C.

In step S4, the heater input value H₁Is obtained
Then, the process branches to step S5. Step S5 is desired
Heater input value H₁Is the current heater input value H₀Is equal to
Is a process for determining whether or not₁Is H₀Is equal to (Y
If ES), the process returns to the routine of steps S2 to S4.
H in step S5₁And H₀When and are equal signs (NO)
Is the desired heater input value H in step S6.₁
Is the current heater input value H ₀To replace step S2
Return to the routine of S4. The calculation means 11 is as described above.
A station that circulates in the loop and corresponds to the distance between the heater 2 and the human body.
Heating can be performed to achieve a local comfort zone.

As described above, in this embodiment, as compared with the conventional control using only room temperature, a good feeling of heating can be obtained even at an arbitrary distance between the heater and the human body, and consumption is performed without performing unnecessary heating. Power can be saved.
As another example, the distance L between the heater and the human body is
The user can manually select the distance measuring means, and the distance measuring means can be omitted.

Further, by using, for example, two distance-measuring ultrasonic sensors, the data of the distance between the heater and the human body as well as the data of the direction of the human body with respect to the heater are detected, and the heater direction is set to the direction in which the human body is present. It can also be moved. In this case, one ultrasonic sensor and a current collecting infrared sensor that detects infrared rays emitted from a human body and outputs an output signal may be used together to detect the distance and the direction.

Further, in the embodiment, the required heater input is calculated by the table divided into two quadrants, but since the radiation amount is constant, the table for directly calculating the heater input value from the room temperature and distance data. Can also be used. (Embodiment 2) Another embodiment will be described with reference to FIGS.

FIG. 5 shows a block diagram of the radiant heating apparatus of this embodiment, and FIG. 6 shows a perspective view thereof. This heater is
In the heater of the first embodiment shown in FIGS. 1 and 2, the radiant heater 2a and a radiant heater driving section 5a for controlling the driving of the radiant heater 2a.
In addition, a warm air heater 2b, a warm air heater drive unit 5b, a sirocco fan 9 and a sirocco fan drive unit 5c are added to have a warm air heating function in addition to the radiant heating function of the first embodiment. Is.

As shown in FIG. 6, a radiant heater 2a is arranged on the upper part of the main body 1, and a warm air blowing port 19 is provided on the lower front surface of the main body 1. The warm air heater 2b shown in FIG. 5 is arranged directly behind the warm air outlet 19, but this warm air heater 2b is not shown in FIG. A sirocco fan 9 having a built-in drive motor is rotatably supported by the main body 1 behind the warm air heater 2b, and a heat exchanger 8 is disposed above the sirocco fan 9. In addition,
The heat exchanger 8 is a part of a heat pump type refrigerating device (not shown) built in the main body 1, and the sirocco fan 9 blows out the air sucked from the back surface of the main body 1 as an external heat source. It cools or heats air.

The operation of this heater is the same as that of the first embodiment, except that the calculating means 11 is based on the room temperature and the distance L, and the radiant heater driving portion 5a, the warm air heater driving portion 5b and the sirocco fan driving portion 5c. Control individually. The radiant heater driving unit 5a and the warm air heater driving unit 5b are power control circuits with built-in power transistors, and perform switching control of energization currents to the radiant heater 2a and the warm air heater 2b.
The sirocco fan drive unit 5c is composed of a power transistor circuit that intermittently controls a current supplied to the sirocco fan 9.

In FIG. 6, when the sirocco fan 9 rotates and the hot air heater 2b is energized, the suction air sucked from the radiant opening in the upper front part of the main body 1 is sucked by the sirocco fan 9b.
And is heated by the warm air heater 2b directly behind the warm air blowing port 19 and is blown out from the warm air blowing port 19 in front of the main body 1.

Other than that, the configuration and operation of the adjusting knob 4, the temperature sensor 7, the ultrasonic sensor 3, the distance detecting section 12, and the room temperature detecting section 13 are the same as in the first embodiment. The operation of the calculation means 11 for driving and controlling the radiant heater 2a and the warm air heater 2b based on the room temperature and the distance L will be described with reference to the flowchart of FIG. First, at the beginning of turning on the power,
The calculation means 11 outputs the radiation heater input W ₁ = 0 and the warm air heater input W ₂ = 0 as the initial heater input values (step S10), and then outputs the digital value of the output of the temperature sensor 7 from the room temperature detection unit 13. Reading, the digital value of the output of the ultrasonic sensor 3 is read from the distance detection unit 12 (step S1
2).

Next, the necessary heat flux q ₀ at the point at the above distance from the room temperature is read by the table (see the fourth quadrant IV in FIG. 3) built in the ROM 15 (see FIG. 5) (step S14) and needs to be read. The required radiant heater input W _o1 at the point of the above distance from the heat flux q _{0 is stored} in the ROM 15 (see FIG. 5).
(Refer) The built-in table (see the first quadrant I in FIG. 3) is used for reading (step S16). However, in this example,
The vertical axis of the table of FIG. 3 represents the required heat flux q ₀ , and the heater input on the horizontal axis of the first quadrant I of FIG. 3 represents the required radiant heater input W _o1 .

Next, the required radiant heater input W obtained_o1But
Maximum allowable input value W of the radiant heater 2a ₁ exceeds max
Check if it exceeds (step S18).
Radiant heater input W of data 2a₁ Is the maximum of the radiant heater 2a
Allowable input value W₁ Check for equality to max (step
S20), if not equal, the radiation input of the radiation heater 2a
W₁ Its maximum value W₁ Set to max and step S22
If not, the process directly goes to step S28.

In step S28, the maximum radiant heat flux q ₁ at the point of the distance L when the maximum value W ₁ max is input to the radiant heater 2a is referred to by referring to the table built in the ROM 15 (see FIG. 8). Search for max. Note that FIG. 8 is equal to the first quadrant I in FIG. 3, and the heat flux q in FIG.
₁ max is a value at a distance L = 0.5 m. next,
From the required heat flux q ₀ obtained up to now, the maximum radiant heat flux q ₁ m
The required warm air heat flux q ₂ to be supplemented by the warm air heater 2b is obtained by subtracting ax (step S34), and the required warm air heat flux q _{2 is} obtained by the table built in the ROM 15 (see FIG. 9). The required warm air heater input W _o2 to the wind heater 2b is searched (step S36).

Here, the table in the fourth quadrant IV of FIG. 9 is for determining the required warm air heat flux (hereinafter, also referred to as a corrected heat flux) q ₂ at a predetermined room temperature from the room temperature and the required warm air heat flux q _2. The table in the fourth quadrant I of FIG. 9 is a table for obtaining the warm air heater input W ₂ of the warm air heater 2b from the corrected heat flux q ₂ and the distance L. The maximum value W ₂ max in FIG. 9 indicates the maximum allowable input to the warm air heater 2b.

Next, determine whether the current warm air heater input W ₂ equal to require warm air heater input W _o2 determined (step S38), if they are equal it, the necessary warm air heater input W _o2 be equal As the warm air heater input W ₂ (step S40), the process returns to step S12. On the other hand, if the required radiant heater input W _o1 is not larger than the maximum value W ₁ max in step S18, it is checked whether or not the current radiant heater input W1 is equal to the required radiant heater input W _o1 (step S30). If they are not equal, the required radiant heater input W _o1 is set as the radiant heater input W ₁ (step S32), and the process returns to step S12.

With this arrangement, spot air heating at a far point where the radiation heater 2a cannot reach the heating capacity can be assisted by warm air heating, which is effective. That is, in a certain distance range, warm air heating is more effective than radiant heating in terms of heating feeling and power efficiency, and it is better to add the warm air heater 2b than to increase the power of the radiant heater 2a. There is. However, when the person to be heated is close to the heater, it is preferable to use radiant heating because there is no noise such as fan or wind. Therefore, according to this embodiment, when the person to be heated is approaching the heater, quiet radiant heating is performed,
When the person to be heated is separated from the heater, warm air heating with relatively low noise and good heating feeling and power efficiency can be added. (Modification) In the above embodiment, the warm air heater 2b is a steplessly controlled electric heater, but it is natural that the warm air heater 2b can be controlled stepwise.

At the beginning of the heating operation, hot air heating, which has a high heating effect for the same electric power even though there is noise, is mainly used, and the radiant heating is changed stepwise (see FIG. 10) or steplessly over time. You can also increase the percentage. Furthermore,
Instead of or in addition to the warm air heater 2b, the heat of the heat exchanger (condenser) 8 of the heat pump type refrigerating apparatus shown in FIG. 6 may be used as a warm air heating heat source. In this case, the heat quantity control of the warm air heating heat source is an on-off two-step control. However, in a heat pump with variable compression capacity or compressor rotation speed, the warm air heat flow is controlled by controlling the compression capacity or compressor rotation speed. The amount of bundles can be controlled.

[0030]

As described above, according to the present invention, by controlling the heater capacity according to the room temperature and the distance from the heater,
Comfortable heating more suitable for the human body is possible.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a radiant heater according to the present invention.

FIG. 2 is a perspective view showing the external appearance of the radiant heater.

FIG. 3 is an explanatory diagram of a table for performing calculation according to the present invention.

FIG. 4 is a flowchart of heater input calculation according to the present invention.

FIG. 5 is a block diagram showing an example of a radiant heating apparatus according to a second embodiment,

FIG. 6 is a perspective view showing the external appearance of the radiant heating device of FIG.

FIG. 7 is a flowchart showing the operation of the radiant heating machine of FIG.

8 is a characteristic diagram showing a table used in FIG. 7,

9 is a characteristic diagram showing a table used in FIG. 7,

FIG. 10 is a timing chart showing a modified operation of the radiant heating machine according to the second embodiment,

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Heater, 3 ... Ultrasonic sensor, 4 ... Adjustment knob, 5 ... Drive part, 7 ... Temperature sensor, 9 ... Blower, 11
... Calculation means (14 ... Central processing unit, 15 ... Heater input table, 12 ... Distance detection unit, 13 ... Room temperature detection unit)

Claims (2)

[Claims] 1. In a radiant heater that drives the heater based on an input value that determines the amount of heat generated by the heater and performs heating with radiant heat from the heater, a radiant amount suitable for a human body selected according to room temperature is set. A radiant heating machine comprising a calculation means for calculating a heater input value to be obtained at a point distant from the heater by an arbitrary distance. 2. A blower for blowing hot air heated by the heater to the point, wherein the calculating means changes a heat quantity ratio between the radiant heating and the warm air heating according to the distance. The radiant heating machine according to Item 1.