JPS62194161A - Temperature control device for combustion equipment - Google Patents

Abstract

PURPOSE:To permit to change a set temperature automatically and effect a control more close to a temperature felt by an user by a method wherein a combustion equipment is controlled by a reference room temperature, obtained by correcting the detecting temperature of a temperature sensor detecting an indoor ambient temperature with a temperature of the main body of the equipment, the wall of a room or the like. CONSTITUTION:A room temperature is increased when heating is started, therefore, a desired temperature, set by a room temperature setting unit 3, is compared with a reference room temperature T0, a micro-computer 4 outputs and stops to output in accordance with a difference obtained by the comparison to control the conduction and non-conduction of a relay 5 through a transistor 6 and a combustion control circuit 8 is controlled by the contact 5a of the relay 5 to keep the room temperature at the set temperature. In this case, said reference room temperature T0 is a temperature obtained by a correcting temperature, operated based on a temperature difference between the detecting temperature T1 of a first temperature sensor 1, detecting the ambient temperature in a room, and the detecting temperature T2 of a second temperature sensor 2, detecting the temperature of the main body of an equipment, the wall of the room or the like, while an combustion equipment is controlled in accordance with the reference room temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a temperature control device for a combustion appliance such as a hot air heater, which controls the combustion of a room temperature so as to maintain it at a set temperature.

Conventional technology> Conventionally, in this type of combustion appliance, the temperature detected by one temperature sensor that detects the indoor atmospheric temperature is set to room temperature, and the combustion appliance is controlled to maintain this room temperature at a set temperature desired by the user. It was something.

<Problems to be Solved by the Invention> By the way, with such conventional temperature control, even when the room temperature reaches the set temperature and the combustion appliance stops operating, especially at the start of heating, the actual temperature of the walls and floor of the room does not change. Because it took time for the so-called ambient temperature to rise sufficiently, the user could not feel very warm.

In addition, to prevent this, it is possible to set the set temperature higher than the originally desired temperature when heating starts, and then reset the set temperature to the originally desired temperature, but this operation was extremely troublesome. .

Means for Solving the Problems This invention focuses on the above points and provides two temperature sensors: a first temperature sensor that detects the indoor atmospheric temperature, and a second temperature sensor that detects the temperature of the appliance body or the walls of the room. The room temperature is adjusted to the temperature detected by the first temperature sensor and the corrected temperature calculated based on the temperature difference between the first temperature sensor and the second temperature sensor, and the combustion appliance is operated according to this reference room temperature. It is designed to be controlled.

Function: When heating starts, the room temperature rises, and the first temperature sensor detects this ambient air temperature, and the alt2 temperature sensor detects the temperature of the appliance itself and the walls of the room.

However, since heating has just started, the temperature of the appliance body and the wall does not rise above the ambient temperature, and the temperature detected by the second temperature sensor is lower than the temperature detected by the first temperature sensor.
Therefore, the temperature detected by the #&1 temperature sensor is adjusted by the corrected temperature calculated based on the temperature difference between the same temperature sensor, and this is used as the reference room temperature to control the combustion appliance according to the set temperature. This is to control combustion appliances with consideration.

<Embodiment> Next, a temperature control device for a combustion appliance according to the present invention will be explained using a preferred embodiment shown in the drawings.

Reference numeral 1 denotes a first temperature sensor consisting of a thermistor or the like, which is installed on the combustion air suction side of the main body (not shown) and detects the indoor atmospheric temperature.

Reference numeral 2 denotes a second temperature sensor, which also includes a thermistor or the like, and is provided on the front surface of the instrument body to detect the ambient temperature of the instrument body or the walls of the room.

Reference numeral 3 denotes a room temperature setting section consisting of a variable resistor, which is used to set a desired room temperature.

Reference numeral 4 denotes a microcomputer to which detected temperature and set temperature signals from the first and second temperature sensors 1.2 and the room temperature setting section 3 are input, and the following arithmetic processing is performed according to each of the input temperature signals. .

T, if T2, T0=T, -(T, -T2)Xi/8 T, if <72, To=T++(Tz T+)XI/8T0: Reference room temperature T1: Temperature detected by the first temperature sensor T2: Temperature detected by the second temperature sensor ('L-Tz) Xi/8 1: Corrected temperature (T2 T1) Xi/8 This microcomputer 4 also sets the reference room temperature T0 obtained by the above formula and the room temperature setting section 3. The set temperature is compared with the set temperature, and a control output for the combustion appliance, which will be described later, is transmitted according to the difference.

Furthermore, the corrected temperature in the above formula should be at most 3 degrees Celsius considering the difference from the actual room temperature, and if the corrected temperature is 3 degrees Celsius or higher, the difference between the actual room temperature felt by the user and the standard room temperature T0 that is the basis for controlling the combustion appliance. This prevents the room from becoming too hot or too cold due to the difference in temperature.

Furthermore, the constant 178 in the above equation was obtained by taking into consideration that the corrected temperature would not become too large.

Reference numeral 5 denotes a relay connected to a transistor 6 which is turned on by the output from the microcomputer 4, and opens and opens a normal m-type relay contact 5a provided in a combustion control circuit 8 connected to an AC power source 7, thereby starting the combustion. Stop and start are controlled based on the difference between the reference room temperature T0 and the set temperature.

In addition, the microcomputer 4 has the first and second temperature sensors 1.2 indicating that the temperature is above the specified temperature regardless of the reference room temperature T0, in this case, the first temperature sensor 1 is above 40°C, and the second temperature sensor is above 45°C. It is programmed to forcibly stop combustion, that is, in the event of an abnormal rise in room temperature due to lack of oxygen, etc., combustion is instantly stopped to ensure safety.

Next, the operation of this embodiment will be explained.

By starting heating now, the indoor temperature will rise, and the desired temperature set by the room temperature setting section 3 will be compared with the reference room temperature T0, and the microcomputer 4 will output and stop the output according to this difference, and the transistor 6 energization and de-energization of the relay 5 are controlled via the relay contact 5a of this relay 5.
The combustion control circuit 8 is controlled to maintain the room temperature at the set temperature, and at this time, the reference room temperature T. A first temperature sensor 1 detects the indoor atmospheric temperature, and a second temperature sensor 2 detects the temperature of the appliance body, the walls of the room, etc., which is lower than the temperature detected by the first temperature sensor 1 at the beginning of heating. It is obtained by inputting the detected temperature by the second temperature sensor 1 into the microcomputer 4 and processing it.
When the temperature detected by the temperature sensor 2 is 4°C, T0 = 8-(8-4)Xi/8 = 7.5°C, and the reference room temperature is 0.5°C lower than the ambient temperature. Combustion is controlled as r0, and the room temperature can be maintained at a level that is felt by the user while taking into account the ambient temperature.

Further, the correction temperature that is adjusted to the temperature detected by the pr&1 temperature sensor 1 is set at a maximum of 3° C. to prevent the temperature during correction from being too large and too far from the actual room temperature, which may cause the user to feel uncomfortable.

Furthermore, the indoor temperature rises abnormally, and the first temperature sensor 1
When the second temperature sensor 2 detects the specified temperature of 45°C or 0°C, the reference room temperature T is reached. Regardless of the detected temperature itself, the micro combiator 4 outputs an output to stop combustion, thereby instantly resolving the abnormal state and maintaining safety.

<Effects of the invention> In short, this invention is the first method for detecting indoor atmospheric temperature.
It is equipped with a temperature sensor 1 and a second temperature sensor 2 that detects the temperature of the appliance body or the wall of the room, and the temperature detected by the fJS1 temperature sensor 1 is equal to the temperature of the first temperature sensor 1 and the second temperature sensor 2. Since the corrected temperature calculated based on the difference is adjusted and the combustion appliance is controlled using this temperature as the standard room temperature, room temperature control can be performed taking into account the ambient temperature of the appliance body, walls, floor, etc. The temperature can be approximated to the temperature felt by the user, and it is extremely convenient since there is no need for the troublesome operation of changing the temperature setting each time as in the conventional method.

Furthermore (II) If the positive temperature is at most 3 degrees Celsius, the difference from the actual room temperature is too large and it becomes too hot or too cold.
There is no need to worry about causing discomfort to the user.

Furthermore, if the room temperature rises above a specified temperature, combustion can be stopped at the temperature detected by the temperature sensor, regardless of the reference room temperature, so that the response to abnormalities is quick and safe.

[Brief explanation of drawings]

The drawing is an electrical circuit diagram showing one embodiment of the present invention. 1... tJrJ1 temperature sensor, 2... 2nd temperature sensor, 4... Microcomputer-1...
Combustion control circuit.

Claims (3)

[Claims] (1) First temperature sensor 1 that detects the indoor atmospheric temperature
and a second temperature sensor 2 that detects the temperature of the appliance body or the wall of the room, and the temperature difference between the first temperature sensor 1 and the second temperature sensor 2 is added to the temperature detected by the first temperature sensor 1. 1. A temperature control device for a combustion appliance, which adjusts a corrected temperature obtained by calculation based on the temperature and controls the combustion appliance using this temperature as a reference room temperature. (2) The temperature control device for a combustion appliance as set forth in claim 1, wherein the corrected temperature is set to a maximum of 3°C. (3) When the temperatures detected by the first and second temperature sensors 1 and 2 are above a specified temperature, the combustion appliance is controlled by the detected temperature itself, regardless of the reference room temperature. and a temperature control device for a combustion appliance according to item 2.