JPH05340607A - Control device for heater - Google Patents

Abstract

PURPOSE:To make a comfortable heating environment in compliance with a body feeling temperature by a method wherein temperatures at a floor and a wall and the like are accurately detected and a room temperature is controlled in compliance with a radiation temperature from each of these locations. CONSTITUTION:A room temperature sensing means 8, a mounting surface temperature sensing means 9 for sensing a floor surface temperature and a timer means for counting a heating time are provided. A correction value determined in response to a temperature difference between the room temperature sensing means 8 and the mounting surface temperature sensing means 9 and a counting time of the timer means is adjusted to a room temperature or the set temperature so as to perform room temperature control. With such an arrangement, it is possible to provide a control device for a heater in which the radiation temperatures of the floor and the wall and the like can be accurately detected and an energy-saving comfortable heating can be attained without changing the body feeling temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a heater, which is capable of performing comfortable room temperature control.

[0002]

2. Description of the Related Art Conventionally, a control device of this type has a first temperature sensor for detecting an ambient temperature in a room and a main body of a device or a wall of a room, as disclosed in, for example, JP-A-62-19461. And a second temperature sensor for detecting the temperature, and the room temperature is defined as the temperature detected by the first temperature sensor plus or minus a correction temperature calculated based on the temperature difference between the first temperature sensor and the second temperature sensor. , There was a device that controlled the combustion equipment according to this standard room temperature.

In this device, the first temperature sensor is provided on the combustion air intake side of the instrument body to detect the ambient temperature in the room, and the second temperature sensor is provided on the front face of the instrument body. It detects the ambient temperature of the main body or the wall of a room. Then, the room temperature detected by the first temperature sensor is adjusted by the corrected temperature calculated based on the temperature difference between the first temperature sensor and the second temperature sensor, and the combustion appliance is controlled with this temperature as the reference room temperature. Perform room temperature control considering the ambient temperature of the equipment body, walls, floor, etc.

Further, like the combustion control device for a heater disclosed in Japanese Utility Model Laid-Open No. 2-69247, an object temperature detector for detecting an object temperature such as a wall forming a room is provided, and the detected temperature and the room temperature are set. Some of them are provided with a combustion control means for increasing or decreasing the combustion intensity according to the temperature difference between them and the room temperature control in consideration of the object temperature of the room such as a wall as in the conventional example.

[0005]

However, in such a conventional control device, the second conventional example for detecting the ambient temperature of the appliance body in the former conventional example or the wall of a room is detected.
The temperature sensor is attached to the front of the instrument body,
Further, since the object temperature detector in the latter conventional example is attached to the rear surface of the heater main body, the influence of hot air inside the main body after the start of operation is large, and the object temperature of a wall or the like can be accurately detected. Was impossible.

Further, since the detection room temperature is corrected and the combustion intensity is increased / decreased only by the temperature difference between the two sensors, the room temperature may be lowered before the wall or the like is warmed, or it may be sufficiently warmed. Nevertheless, the room temperature is still high, and the user has to perform a troublesome operation such as changing the set temperature each time.

The present invention has been made in order to solve the above problems, without increasing the cost.
A heater that can accurately detect the temperature of walls, floors, etc. and that is always comfortable and energy-saving without changing the sensible temperature from the start of heating to long-time operation only by operating the heater. The purpose is to obtain a control device.

[0008]

A first aspect of a control device for a heater according to the present invention is a room temperature detecting means for detecting a room temperature, and a temperature of a heater installation surface is directly or indirectly detected. A correction value determined based on the temperature difference between the room temperature detection means and the installation surface temperature detection means and the time counted by the timer means. Is adjusted to the set temperature detected by the room temperature detecting means to control the room temperature.

A second aspect of the invention is provided with a display means for displaying that the temperature difference between the room temperature detecting means and the installation surface temperature detecting means is below a predetermined value during the heating operation.

Further, a third aspect of the present invention comprises an informing means for informing an abnormality when the temperature difference of the room temperature detecting means exceeds a predetermined value.

Still further, according to a fourth invention, the room temperature detecting means and the installation surface temperature detecting means are constituted by a thermistor having temperature-resistance characteristics having substantially the same characteristics.

[0012]

In the first aspect of the present invention, when the temperature difference between the room temperature detecting means and the installation surface temperature detecting means becomes small, the room temperature is gradually controlled to be low with the passage of time.

In the second invention of the present invention,
When the temperature difference from the installation surface temperature detecting means becomes smaller than a predetermined value, the user is informed by displaying the degree of warming in the room.

Further, in the third invention of the present invention,
When a failure occurs in either the room temperature detecting means or the installation surface temperature detecting means, the state is notified by a display or the like.

Furthermore, in the fourth aspect of the present invention, since the thermistors having the same characteristics are used for the room temperature detecting means and the installation surface temperature detecting means, the temperature difference can be accurately detected, and the microcomputer calculates the temperature difference. When it does, it can be processed with a very small program capacity.

[0016]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1, FIG. 2, and FIG. 3, 1 is an outer frame of a warm air heater, 2 is a bottom plate of the bottom of the main body, 3 is a combustor attached to the bottom plate 2, 4 is a combustion cylinder that covers the flame of the combustor 3, Reference numeral 5 is a partition plate that covers a cartridge tank (not shown), 6 is a partition plate 5, and is a control circuit unit that controls combustion. 7 is a rear surface of the outer frame 1 of the hot air heater. A blower fan for discharging the heat inside as hot air to the outside, 8 is a room temperature thermistor attached to the back surface of the outer frame 1 of the warm air heater to detect the room temperature, and 9 is a floor surface direction from a hole 2a formed in the bottom plate 2. The floor temperature thermistor 10 for detecting the temperature of the floor surface or the radiant heat is a fixture for fixing the floor temperature thermistor 9.

FIG. 4 shows an electric circuit diagram of the control circuit section 6.
In FIG. 4, the detected temperatures of the room temperature thermistor 8 and the floor temperature thermistor 9 and the information of the room temperature setting volume 11 are converted into a voltage and input to a microcomputer 12 (hereinafter referred to as a microcomputer). The microcomputer 12 is equipped with an A / D converter circuit, a memory, a CPU, etc. for processing these pieces of information, and the output thereof is an indicator 13 for notifying the user of room temperature, an operating state, etc., and a combustor 3 A control element 14 for controlling the combustion amount, a control element 15 for controlling the blowing amount of the blower fan 7, and the like are connected. Reference numeral 16 is an oscillator for generating an internal clock of the microcomputer 12 and a reference time of a timer. The room temperature detecting means corresponds to the room temperature thermistor 8, and the installation surface temperature detecting means corresponds to the floor temperature thermistor 9.

Next, the operation will be described with reference to the flowchart of FIG. 5 and the room temperature control diagram of FIG. First, when the operation switch (not shown) is turned on, the combustor 3 and the blower fan 7 operate to start heating (step 20), and at the same time, the timer in the microcomputer 12 starts counting.
When the room temperature detected by the room temperature thermistor 8 rises with the start of heating and reaches the set temperature, the combustion signal of the combustor 3 is reduced by the control signal from the microcomputer 12 and the room temperature is controlled to reach the set temperature ( Step 22).
The set temperature is set in advance in the memory of the microcomputer 12, or the user sets it to a desired temperature before starting heating.

Next, the microcomputer 12 takes in the detected temperatures of the room temperature thermistor 8 and the floor temperature thermistor 9 and calculates the temperature difference (step 23). The temperature of the air in the room warms up quickly with warm air, but the temperature of the floor, walls, etc. does not warm up easily, so the temperature difference is large at the beginning of heating.

As the temperature of the floor and walls warms with the passage of time and the radiant temperature rises, the user is affected by this radiant heat and feels quite warm even at the same room temperature. When the temperature difference between the room temperature thermistor 8 and the floor temperature thermistor 9 falls within 3 ° C., the initial set temperature is corrected to be slightly lower, and the sensible temperature is kept constant and room temperature control is performed so as not to overheat. Specifically, it is determined whether the timer counting from the start of heating has passed 2 hours (step 24), and if it is within 2 hours, the set temperature is corrected to be lower by 1 ° C. (step 25), If it is more than 2 hours, lower the temperature by 2 ℃.

In the case of the above embodiment, the temperature difference between the room temperature thermistor 8 and the floor temperature thermistor 9 is set to 3 ° C., and the set temperature is gradually lowered according to the value of the timer. May be corrected so that the room temperature is controlled to be gradually decreased. Further, the temperature difference between the room temperature thermistor 8 and the floor temperature thermistor 9 which lowers the set temperature may be changed according to the value of the timer. For example, during the first 2 hours from the start of heating, the temperature difference is 3
If the temperature difference is within 2.5 ° C., the set temperature is corrected. If the temperature difference exceeds 2.5 hours, the temperature difference is within 2.5 ° C. When the heater itself continues to operate, the internal temperature rises. In order to detect the floor temperature accurately, it is necessary to minimize the influence of the internal temperature of the main body, but if the temperature difference is changed according to the operating time as in the above example, the influence of the internal temperature will be canceled. can do.

FIG. 7 shows the relationship between the average floor surface temperature of the room and the floor surface temperature below the bottom plate 2 of the heater. Since the floor surface is where the human body directly touches and it represents the temperature of the wall in the room, by measuring the radiation temperature of the floor surface, the temperature sensation felt by the human body can be accurately known. Therefore, by attaching the floor thermistor 9 to the lowest bottom plate 2 of the heater and bringing it into contact with or close to the floor, it is possible to know the average temperature of the room inexpensively and accurately.

Example 2. FIG. 8 is an explanatory diagram in which display means for displaying the degree of warming is added to FIG. This display means is provided in the display unit 13 and indicates the degree of warming of the room during heating by color display such as LEDs. First, since the room temperature is low at the start of heating, "red" is displayed. Next, when the room temperature rises and approaches the set temperature, the display changes to "orange". Furthermore, room temperature thermistor 8 and floor temperature thermistor 9
When the temperature difference between the two is less than 3 ° C, "green" is displayed to inform the user that the floor is sufficiently warm.

By thus providing the color display means, the user can know the degree of warming in the room. Therefore, if it does not meet the user's preference at this point, the set temperature may be changed, and the guide point of the set temperature change point is given, which is convenient. Further, once the temperature is changed, it is not necessary to change the set temperature much thereafter, so that the number of operations can be reduced.

In the above embodiment, if the floor temperature thermistor 9 is out of order, the color of the display means does not change forever, or the floor is lowered to the set temperature even if the floor is not sufficiently warmed. There is. Therefore, the temperature difference between the room temperature thermistor 8 and the floor temperature thermistor 9 is, for example, 20.
When the temperature rises above 0 ° C, one of the thermistors is considered to be out of order, and it may be displayed on the display 13 to inform the user. In this case, if the thermistor that is determined to be close to normal is used as the reference to perform the room temperature control temporarily, the user can perform normal heating operation, and repair the failure by heating. This can be done when the machine is not in use.

Further, since the temperature difference between the room temperature thermistor 8 and the floor temperature thermistor 9 is constantly measured during the operation of the heater,
If these two thermistors with the same temperature-resistance characteristics are used, a slight temperature difference can be accurately detected, and
If the temperature difference of 0 ° C. is used as a reference when the two detected values are equal, the program of the microcomputer 12 is simplified and can be processed with a small program capacity, so an inexpensive microcomputer can be used.

[0027]

As described above, according to the present invention, the correction value determined based on the temperature difference between the room temperature detecting means and the installation surface temperature detecting means and the operation duration time of the heater counted by the timer means. Is controlled to adjust the room temperature detected by the room temperature detecting means or the preset temperature to control the room temperature, so that the radiation temperature of the floor or wall can be accurately notified at low cost, and the sensation It is possible to obtain an energy-saving and comfortable heater control device that does not overheat without changing the temperature.

Further, according to the second aspect of the invention, the number of operations for changing the set temperature during the heating operation can be reduced, and the usability can be obtained.

Further, according to the third aspect of the invention, it is possible to obtain an effect that a failure or malfunction of a component can be seen at a glance.

Furthermore, according to the fourth aspect of the invention, the temperature difference can be detected accurately and the processing can be performed with a small program capacity, so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a rear view of a heater according to an embodiment of the present invention.

FIG. 2 is a structural diagram of a heater according to an embodiment of the present invention.

FIG. 3 is a partially enlarged view of the heater according to the embodiment of the present invention.

FIG. 4 is an electric circuit diagram of a heater according to an embodiment of the present invention.

FIG. 5 is a control flowchart of the heater according to the embodiment of the present invention.

FIG. 6 is a room temperature control diagram of the heater according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram of a floor surface temperature of the heater according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram of a relationship between room temperature control of a heating device and a display unit according to a second embodiment of the present invention.

[Explanation of symbols]

 8 Room Temperature Thermistor (Room Temperature Detection Means) 9 Floor Temperature Thermistor (Installation Surface Temperature Detection Means) 11 Room Temperature Setting Volume 12 Microcomputer 13 Display (Display Means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Shinohara 800 Iwamatsu, Oshima-cho, Nitta-gun, Gunma Sanryo Electric Co., Ltd. Gunma Factory

Claims (4)

[Claims] 1. A room temperature detecting means for detecting room temperature,
An installation surface temperature detecting means for directly or indirectly detecting the temperature of the installation surface of the heater, and a timer means for counting time when heating starts, the temperature difference between the room temperature detection means and the installation surface temperature detection means and the timer. Controlling a room temperature by performing a room temperature control by adjusting a correction value determined based on the time counted by the means to the room temperature detected by the room temperature detecting means or a preset temperature. apparatus. 2. The heating machine according to claim 1, further comprising display means for displaying that the temperature difference between the installation surface temperature detecting means and the room temperature detecting means is below a predetermined value during the heating operation. Control device. 3. The heating device according to claim 1, further comprising a notification unit that notifies an abnormality when a temperature difference between the room temperature detection unit and the installation surface temperature detection unit exceeds a predetermined value. Control device. 4. The control device for a heating machine according to claim 1, wherein the room temperature detecting means and the installation surface temperature detecting means are constituted by a thermistor having substantially the same temperature-resistance characteristics.