JP3415960B2 - Room temperature controller for combustor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling a room temperature to a set temperature in a heater using a burner using oil or gas as a heat source. 2. Description of the Related Art A temperature sensor for detecting the temperature of a room in which a heater is installed and a temperature setting means for determining a room temperature desired by an operator are provided. 2. Description of the Related Art There is known a heater that compares a difference and outputs a difference signal to a combustion amount varying unit, and the combustion amount varying unit acts on a burner to maintain a temperature of a room in which the frame is installed at a set temperature. [0003] In this type of heater, the combustion amount variable means is capable of varying the combustion amount in multiple stages or linearly between the maximum combustion and the minimum combustion. The set temperature can be maintained by burning with a combustion amount comparable to the amount of heat radiated from the room. [0004] The above-mentioned heater may be used in the early autumn or early spring while it is still warm. In such a case, even if the burner burn rate is maintained at the minimum burn rate. Room temperature will rise. Conventionally, as a countermeasure, the burner operation is temporarily stopped when the temperature rises by 2 to 3 ° C. from a set temperature called a save operation, and the burner is operated again near the set temperature. It is. [0005] However, some people always use the save operation mechanism. However, when the heater is an indoor exhaust type, it sometimes emits a bad smell at the time of extinguishing and igniting. Many people rarely use the save operation mechanism. According to the present invention, when the combustion amount of a burner is changed in a plurality of stages or linearly, the variable width of the combustion amount can be realized under all conditions where use of a heater is assumed. The burner combustion depends on temperature conditions,
By specially designating the conditions for blowing the combustion air and the like, the present inventors have focused on the point that it is possible to achieve combustion with a reduced amount of combustion that cannot be used in normal operation. That is, a temperature sensor 2 for detecting the temperature in the room where the frame 1 is installed, a temperature setting means 3 for determining the temperature in the room where the frame 1 is installed, and a room provided in the frame 1 A burner 4 for heating, a combustion amount varying means 5 for varying combustion supplied to the burner 4 and a flow rate of air, and a comparison circuit 6 for comparing temperature data between the temperature sensor 2 and the temperature setting means 3 are provided. A variable combustion amount based on the output signal of the circuit 6
In a heating combustor in which the stage 5 changes the heat generation amount of the burner 4 and the temperature of the room in which the frame 1 is installed is maintained at the temperature specified by the temperature setting unit 3, the combustion amount variable unit 5 includes a plurality of stages. Alternatively, the amount of combustion is varied linearly and combustion is performed with this amount of combustion.
A normal combustion position 5a that can be, the combustion in smaller heating value than passing <br/> normal combustion position 5a at the time of high room temperature
And a mini-combustion position 5b that comes as input temperature data of the comparison circuit 6 and the temperature sensor 2, along with the room temperature is a constant temperature higher than the set temperature, the room temperature is the Mini combustion positive
A determination circuit 7 is provided for instructing the combustion at the mini-combustion position 5b when the combustion in the operation becomes possible . As described above, the change in the amount of combustion of the burner 4 limits the variable range of the amount of combustion so that stable combustion is possible under various conditions in which the heater is used. If the temperature condition can be set, stable combustion from normal maximum combustion to minimum combustion is possible. However, when you Shiboro the combustion amount of burners to minimize combustion less, the amount of combustion air is very low required, the set temperature is low blast air
The air volume is not stable and the air volume varies, so that normal combustion can not be expected . On the other hand, the rotation of the blower at a set temperature is high
The smooth lubrication of the shaft is possible, the amount of blown air is stable, and the combustion can be performed more narrowly than the normal combustion. According to the present invention, the combustion amount varying means 5 performs the normal operation in which the combustion amount is further narrowed than the normal combustion position 5a.
Is provided with a mini-combustion position 5b that cannot be used , and realizes mini-combustion when the temperature becomes higher than a set temperature by a determination circuit 7 by a certain temperature or more and the room temperature becomes higher than a specially designated high temperature. For this reason, since the burner enters a pilot-fire state, the temperature rise at room temperature stops or the room temperature falls. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in the drawings. 1 is a frame of a heater, 2 is a temperature sensor for detecting the temperature in a room where the heater is installed, and 3 is a frame 1 The attached temperature setting means. 4 is a burner mounted in the frame 1, 8 is a blower for blowing combustion air to the burner 4, 9 is a fuel pump for supplying fuel to the burner 4, and 10 is a preheating and ignition heater mounted on the burner 4. When the operation of the heater is started by the operation switch 11, the burner 4 is preheated by the ignition heater 10. Thereafter, when air and fuel are supplied to the burner 4 by the fuel pump 9 and the blower 8, the combustion is started by the heat of the ignition heater 10, and the combustion is completed in the combustion chamber 12 following the burner 4. Reference numeral 13 denotes an air flow passage provided in the frame 1, reference numeral 14 denotes a hot-air outlet provided in the front of the frame 1, and reference numeral 15 denotes a convection fan mounted on the back of the frame 1. The high-temperature combustion gas sent to the flow path 13 is combined with the air blown into the air flow path from the back of the frame 1 by the convection fan 15, and forwardly from the hot air outlet 14 on the front of the frame 1. It is used for blowing and heating. Reference numeral 5 denotes a combustion amount changing means for controlling the fuel pump 9 and the blower 8 to change the combustion amount of the burner 4; and 5a, a normal combustion for changing the combustion amount in a plurality of stages or linearly in the combustion amount changing means 5. A position 6 is a comparison circuit which receives the temperature data of the temperature sensor 2 and the room temperature setting means 3 as input, and the comparison circuit 6 sends a comparison result of both the temperature data to the combustion amount variable means 5 to determine the normal combustion position 5a. The burner 4 is instructed to change the combustion amount. Therefore, when the comparison circuit 6 outputs a negative output signal whose temperature data of the temperature sensor 2 is lower than that of the room temperature setting means 3, the combustion amount variable means 5 sets the fuel pump 9 and the blower 8 corresponding to the maximum combustion amount. , And the burner 4 raises the room temperature by the maximum combustion amount. Next, when the temperature data of the temperature sensor 2 becomes higher than that of the room temperature setting means 3, the comparison circuit 6 sends a positive output signal to the combustion amount variable means 5 and the burner 4
Changes the amount of combustion to medium combustion or small combustion in accordance with the magnitude of the output signal and maintains the room temperature at a constant temperature. [0015] 5b is not a full range that can be set in the temperature setting means 3, combustion <br/> ware stable even I further down the combustion rate than special group to normal combustion position 5a of the temperature conditions specified Mini-combustion position of the variable combustion amount means 5 capable of
Is a judgment circuit which receives the temperature difference data of the comparison circuit 6 and the temperature data of the temperature sensor 2 as inputs. Generally, the determination circuit 7 determines that the room temperature, which is a condition for enabling the burner 4 to perform minute combustion, is a high temperature,
It is determined whether the temperature difference data from the set temperature is large and a small combustion is required, and the determination circuit 7 outputs an output signal to the mini-combustion position 5b of the combustion amount variable means 5 only when the condition is met. And instructs the burner 4 to perform combustion in which the combustion amount is further reduced than the minimum combustion amount in the normal combustion position 5a. In the embodiment of the present invention, when the room temperature data obtained by the temperature sensor 2 is 25 ° C. or more and the temperature difference data of the comparison circuit 6 becomes higher than the set temperature by 5 ° C. or more, there is a request for minute combustion. It is determined that the burner 4 burns with the combustion amount reduced to an extremely small value. Incidentally, even in the case of a combustor equipped with a conventional save operation structure, the room temperature control device may be operated when the save operation is stopped. Therefore, a preferable temperature control can be selected, and the usability is improved. As described above, in a heater using a burner, the room temperature set by the room temperature setting means 3 is maintained, and even if the calorific value of the burner 4 is reduced by the normal automatic operation operation, the surroundings are not affected. Depending on the conditions, it is unavoidable that the room temperature keeps rising, and a save operation structure is conventionally known as a means for this.However, since fire extinguishing and ignition are repeated, it is notorious for its bad smell. I wasn't. [0020] The present invention also dropped the number of revolutions of when the ambient temperature is hot air blower, focusing on the point that the blowing of fine small amount can be stably obtained, which was provided with a mini-combustion position of this order, The room temperature is a condition that enables the burner to perform micro combustion. When the temperature becomes high and the temperature becomes higher than a predetermined desired temperature by a certain temperature, the burner 4 performs combustion limited to the micro combustion amount. In addition, even if the heater is operated continuously, the room temperature does not rise excessively and is stable. For this reason, even if the temperature rises excessively,
It is not necessary to perform the fire extinguishing operation, and comfortable heating can be obtained without being bothered by the odor generated at the time of fire extinguishing and at the time of the next ignition.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a room temperature control device according to the present invention. FIG. 2 is a sectional view of a heater showing an embodiment of the present invention. [Description of Signs] 1 Frame 2 Temperature sensor 3 Temperature setting means 4 Burner 5 Combustion amount variable means 5a Normal combustion position 5b Mini combustion position 6 Comparison circuit 7 Judgment circuit

Claims (1)

(57) [Claims 1] A temperature sensor 2 for detecting the temperature in the room where the frame 1 is installed, a temperature setting means 3 for determining the temperature in the room where the frame 1 is installed, Comparison of the temperature data of the burner 4 for heating the room provided in the frame 1, the combustion amount variable means 5 for varying the combustion supplied to the burner 4 and the flow rate of air, and the temperature sensor 2 and the temperature setting means 3 And a combustion amount varying means 5 based on an output signal of the comparison circuit 6.
In a heating combustor that changes the amount of heat generated by the heater 4 to maintain the temperature of the room in which the frame 1 is installed at the temperature specified by the temperature setting means 3, the combustion amount variable means 5 includes a plurality of stages or linear heaters. normal combustion position the combustion amount by the variable Ru can burn in the combustion amount 5
comprising a a, a mini combustion position 5b that can be burned in smaller heating value than normal combustion position 5a at the time of high ambient temperature, and receives the temperature data of the comparator circuit 6 and the temperature sensor 2, a constant than room temperature the set temperature As the temperature rises, the room temperature is ahead
When the combustion in the mini-combustion position becomes possible , the determination circuit 7 instructs the combustion in the mini-combustion position 5b.
A room temperature control device for a heater, comprising: