JPH0444973Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a heater that heats a room by supplying hot water generated by a heat exchanger to a radiator for indoor heating such as a floor panel, and particularly relates to The present invention relates to a heat collection control device that controls heat collection in an exchanger.

(Prior Art) Fig. 2a is a schematic diagram of this type of heating machine, in which 1 is the main body of the heating machine, 2 is a pot-type burner arranged in the center inside the main body 1, and 3 is a combustion A blower for supplying air, and 4 an oil amount regulator equipped with an electromagnetic pump (not shown) for supplying fuel. Reference numeral 5 denotes a radiant cylinder which is placed above the burner 2 and whose side surface is exposed to the outside.The radiator cylinder 5 becomes red hot due to combustion of the burner 2 and heats the room with radiant heat. A cylindrical body 6 is made of glass and covers the outer periphery of the radiation cylinder 5. Reference numeral 7 denotes an exhaust passage connected to the upper part of the radiation tube 5, and the exhaust passage 7 communicates with an exhaust tube 8 protruding from the upper surface of the main body 1.

Reference numeral 9 denotes a heat exchange chamber disposed at an upper outer position of the radiant cylinder 5, and a heat exchanger 10 made of a pipe material is disposed within the heat exchange chamber 9. Further, this heat exchange chamber 9 is formed with an intake port 9a and an exhaust port 9b that communicate with the exhaust passage 7.
The intake port 9 is located near each of the intake port 9a and the exhaust port 9b.
a damper 11a that opens and closes each of the exhaust port 9b and the exhaust port 9b;
11b is provided. This damper 11a, 1
1b are simultaneously opened and closed by a motor 20, which will be described later.

12 is a hot water storage tank for storing the hot water generated by the heat exchanger 10; 13 is a pump for supplying hot water;
Reference numeral 14 designates a floor panel having a hot water circulation passage therein, and the heat exchanger 10, hot water storage tank 12, pump 13, and floor panel 14 constitute a hot water circulation circuit. 12a is a water supply port of the hot water storage tank 12, 15
is a return circuit connected to the discharge side of the pump 13.

16 is a thermistor for detecting the temperature of the incoming water, which is installed in the piping between the heat exchanger 10 and the hot water storage tank 12;
Reference numeral 17 denotes a thermistor for detecting the return water temperature, which is installed in the piping between the floor panel 14 and the heat exchanger 10.

FIG. 2b shows the heat exchanger 10 during floor heating.
18 is a block diagram of a heat collection control device that controls heat collection in a
4 a temperature setting section that can adjust the temperature of the hot water being circulated between high and low temperatures; 19 a microprocessor;
This is a control unit consisting of memory and the like. This control section 19
controls the pump 13 for hot water supply and the motor 20 for driving the damper, respectively, based on the control program stored in the memory based on the detection signals of the thermistors 16 and 17 and the set value of the temperature setting section 18. . Specifically, the average value corresponding to the average water temperature of the forward water temperature and the return water temperature is calculated from the detection signals of the thermistors 16 and 17, and the average value is compared with the set value of the temperature setting means 18, so that the average water temperature is set. When the average water temperature is lower than the set temperature, the motor 20 is rotated to open each damper 11a and 11b to promote heat collection in the heat exchanger 10, and when the average water temperature is higher than the set temperature, the motor 20 is rotated. Each damper 11a,
11b to suppress heat collection.

(Problem to be solved by the invention) However, in the past, the average water temperature of the going water temperature and the returning water temperature was compared with the set temperature, and each damper 11a, 11b was opened and closed based on the comparison result. As shown in the temperature graph in c, when the floor heating starts up with a large temperature difference between the outgoing water temperature and the return water temperature, even if the outgoing hot water is boiling, this cannot be detected by the control side, and the high temperature hot water is There was a problem in that it was supplied to the floor panel 14 as it was.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a heat collection control device for a heater that can prevent hot water from boiling when indoor heating starts up and provide comfortable indoor heating. purpose.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an opening/closing means for opening/closing a heat collection passage that guides exhaust gas from a burner to a heat exchanger, and a means for opening and closing a heat collection passage that leads exhaust gas from a burner to a heat exchanger, and a means for heating a room by heating hot water generated by the heat exchanger. a first temperature sensor that detects the temperature of the outgoing water sent from the heat exchanger to the indoor heating radiator; and a first temperature sensor that detects the temperature of the return water that is returned from the indoor heating radiator to the heat exchanger. A second temperature sensor to detect, a temperature setting means to set the temperature of the circulating water of the indoor heating radiator, and an average water temperature of the outgoing water temperature and the return water temperature based on the detection signals of the first and second temperature sensors. a first signal generating means that calculates an average value, compares the average value with a set value of the temperature setting means, and outputs an opening/closing signal to the opening/closing means based on the comparison result; and a first temperature sensor. a second signal generating means that compares the detection signal with a reference value corresponding to a threshold temperature lower than the boiling temperature and outputs a closing signal to the opening/closing means when the outgoing water temperature is equal to or higher than the threshold temperature; It is characterized by having the following.

(Function) According to the present invention, the first signal generating means determines the outgoing water temperature and the returning water temperature from the detection signals of the first temperature sensor that detects the outgoing water temperature and the second temperature sensor that detects the return water temperature. An average value corresponding to the average water temperature is calculated, and an opening/closing signal is output to the opening/closing means based on a comparison result between the average value and a set value of the temperature setting means.

Further, the second signal generating means compares the detection signal of the first temperature sensor with a reference value corresponding to a threshold temperature lower than the boiling temperature, and determines that the outgoing water temperature is equal to or higher than the threshold temperature. In this case, a closing signal is output to the opening/closing means. By closing the opening/closing means, the heat collection passage that guides the exhaust gas from the burner to the heat exchanger is closed, and heat collection in the heat exchanger is suppressed.

(Example) An example of the present invention will be described below from Figures 1a to 1.
This will be explained with reference to Figure c and Figure 2a, which schematically shows the heater.

Figure 1a shows a block diagram of the heat collection control device, and in the same figure, 21 is a temperature setting unit that can adjust the temperature of hot water circulated to the floor panel 13 during floor heating between high and low temperatures. Yes, the temperature setting section 2
1 is equipped with a variable resistor 21a for temperature setting.

22 is a microprocessor 23, a memory 24,
It is a control unit consisting of an input port 25 and an output port 26, and the input port 25 has a thermistor 1.
6, 17 and the variable resistor 21a are connected,
In addition, the output port 26 has a pump 13 for supplying hot water.
A drive circuit 27 and a drive circuit 28 of the motor 20 for driving the damper are connected.

The control section 22 executes a control program stored in the memory 24 based on the detection signals of the thermistors 16 and 17 connected to the input port 25 and the set value of the temperature setting section 21, that is, the resistance value of the variable resistor 21a. Based on this, a drive signal is output to each of the drive circuits 27 and 28 to drive and control the pump 13 for hot water supply and the motor 20 for driving the damper, respectively.

Next, heat collection control will be explained with reference to the flowchart shown in FIG. 1b.

First, it is determined whether or not a request for floor heating has been made by operating a predetermined switch while the room is being heated by combustion in the burner 2 (step 1). If a request is made, first the drive circuit 27 A drive signal is output to operate the pump 13 to circulate water (step 2). Next, the drive circuit 27
A drive signal is output to rotate the motor 20 and open each damper 11a, 11b (step 3). When the dampers 11a and 11b are opened, exhaust gas is introduced into the heat exchange chamber 9 to the burner 2, and the exhaust gas promotes heat collection in the heat exchanger 10 and gradually heats the water passing through the interior.

Next, the water temperature T1 is determined by the thermistor 16.
is detected (step 4), and the detected signal is compared with a reference value corresponding to a threshold temperature Tr (approximately 80° C.) lower than the boiling temperature (step 5).

If the outgoing water temperature T1 is lower than the threshold temperature Tr, then the return water temperature T is set by the thermistor 17.
2 is detected (step 6), and the detected signal is compared with a reference value corresponding to the threshold temperature Tr (step 7).

If the return water temperature T2 is lower than the threshold temperature Tr, then the average water temperature of the outgoing water temperature T1 and the return water temperature T2 is determined from the detection signals of the thermistors 16 and 17.
An average value corresponding to Ta is calculated (step 9), and the average value is compared with the resistance value of the variable resistor 21a (step 10).

If the average water temperature Ta is lower than the set temperature Ts, each damper 11a, 11b is opened, but if it has already been opened, it will continue to be opened.

In step 5, the outgoing water temperature T1 becomes the threshold temperature.
Tr or higher, or if the return water temperature T2 is higher than the threshold temperature Tr in step 7,
Alternatively, if the average water temperature Ta is equal to or higher than the set temperature Ts set in the temperature setting section 22 in step 9, a drive signal is output to the drive circuit 27 to rotate the motor 20 and close each damper 11a, 11b. (Step 11). By closing the dampers 11a and 11b, the introduction of exhaust gas into the heat exchange chamber 9 is stopped, and heat collection is suppressed.

Next, it is determined whether the floor heating request has been canceled (step 12), and if it has not been canceled, the process returns to step 4. If it is released, each damper 1
1a and 11b (step 13), and pump 1
Stop the operation of Step 3 (Step 14), and proceed to Step 1.
Return to

In this way, according to the embodiment, the outgoing water temperature T1
When at least one of the return water temperature T2 and the return water temperature T2 is equal to or higher than the threshold temperature Tr (approximately 80°C) lower than the boiling temperature, each damper 11a, 11b is closed and the heat exchanger 1
As shown in the temperature graph shown in FIG. It is possible to prevent this and keep the temperature of the incoming hot water near the threshold temperature Tr (approximately 80° C.). Therefore, when the floor heating starts up, high-temperature hot water is not directly supplied to the floor panel 14, making it possible to realize comfortable floor heating.

In the above embodiment, the detection signals of the thermistors 16 and 17 are compared with the reference value corresponding to the threshold temperature Tr, but normally the outgoing water temperature T1 is lower than the returning water temperature T2. Therefore, the same effect as described above can be achieved even if only the detection signal of the thermistor 16 is compared with the reference value corresponding to the threshold temperature Tr. Furthermore, the floor panel shown as a radiator for indoor heating may be another radiator for indoor heating such as a fan convector, a fin convector, or a panel convector.

(Effect of the invention) As explained above, according to the invention, the second signal generation means generates the detection signal of the first temperature sensor and the reference value corresponding to the threshold temperature lower than the boiling temperature. In comparison, when the outgoing water temperature is above this threshold temperature, the opening/closing means can be closed to suppress heat collection in the heat exchanger, so indoor heating with a large temperature difference between the outgoing water temperature and the return water temperature is possible. At the time of rise of temperature, it is possible to prevent the hot water from boiling and keep the temperature of the hot water near the threshold temperature. Therefore, when indoor heating starts up, high-temperature hot water is not directly supplied to the indoor heating radiator, and comfortable indoor heating can be achieved.

[Brief explanation of the drawing]

1a to 1c show one embodiment of the present invention, in which FIG. 1a is a block diagram of a heat collection control device, FIG. 1b is a flowchart of heat collection control, and FIG.
Figure c is a temperature graph related to heat collection control, Figure 2a is a schematic diagram of a heater, Figure 2b is a block diagram of a conventional heat collection control device, and Figure 2c is a temperature graph related to conventional heat collection control. It is a graph. 2... Burner, 10... Heat exchanger, 11a, 1
1b... Damper, 13... Pump (hot water supply means), 14... Floor panel (radiator for indoor heating), 1
6, 17...Thermistor (first and second temperature sensor), 20... Motor, 21a... Variable resistor (temperature setting means), 22... Control unit.

Claims (1)

[Claim for Utility Model Registration] An opening/closing means for opening and closing a heat collection passage that guides burner exhaust gas to a heat exchanger, a hot water supply means for supplying hot water generated in the heat exchanger to a radiator for room heating, a first temperature sensor that detects the temperature of the outgoing water sent from the exchanger to the radiator for indoor heating; a second temperature sensor that detects the temperature of the return water that is returned from the radiator for indoor heating to the heat exchanger; A temperature setting means for setting the temperature of the circulating water of the radiator, and calculating an average value corresponding to the average water temperature of the outgoing water temperature and the returning water temperature from the detection signals of the first and second temperature sensors, and calculating the average value corresponding to the average water temperature of the outgoing water temperature and the returning water temperature, and a first signal generating means that compares the set value of the setting means and outputs an opening/closing signal to the opening/closing means based on the comparison result; and a detection signal of the first temperature sensor and a threshold temperature lower than the boiling temperature. Compare with the standard value corresponding to
A heat collection control device for a heater, comprising: second signal generating means for outputting a closing signal to the opening/closing means when the outgoing water temperature is equal to or higher than a threshold temperature.