JPH0452568Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a heating device that supplies hot water to a plurality of radiators connected in series from high temperature to low temperature.

[Prior Art] This type of conventional heating device controls the temperature of hot water by circulating hot water obtained from a heat source such as a boiler to a plurality of radiators in the order of high temperature to low temperature. It is designed to be used efficiently. For example, fan convectors and panel radiators, which are generally used indoors, are used as radiators for high temperatures, and panels for floor heating are used as radiators for low temperatures, connected in series. According to this, high temperature water obtained from a heat source is first given to the fan convector, which is operated at an appropriate temperature. The temperature of the hot water that passes through this fan convector decreases, but by matching that temperature to the next floor heating panel, it is possible to operate multiple radiators at the same time in one circulation path. can.

[Problems to be solved by the invention] However, according to the conventional heating device described above, the temperature of the hot water obtained from the heat source is controlled at a constant level at the outlet of the hot water, that is, at the input side of the high-temperature fan convector. If the fan convector is in operation along with the low-temperature floor heating panel, the floor heating panel will be kept at an appropriate temperature, but when the fan convector is stopped, high-temperature water will flow to the floor heating panel and the temperature will rise. There was a problem that the temperature could not be maintained at an appropriate temperature.

[Means for Solving the Problems] The heating device according to the present invention cyclically warms the water in the heat exchanger to a high temperature using the heat generated by the burner that burns with fuel whose supply amount is controlled from the fuel regulator. , hot water is supplied to a plurality of radiators connected in series from high temperature to low temperature in the input/output side circulation path of the heat exchanger, and the amount of fuel supplied is controlled from the heat exchanger. In the heating device configured to perform heating according to the temperature detected by a water temperature sensing element attached to the outgoing pipe to the high temperature radiator, there is another heating device in the return pipe from the low temperature radiator to the heat exchanger. A water temperature sensing element is attached, and means is added to the fuel regulator for controlling the amount of fuel supplied to the combustion burner in response to an output signal obtained from the other water temperature sensing element. do.

[Function] According to this invention, the return hot water of the heat exchanger is controlled by the water temperature sensing element and the fuel controller, so even if the operation of the high temperature radiator is stopped, the low temperature radiator is maintained at an appropriate temperature. be done.

[Embodiments of the invention] Next, examples of the heating device according to the invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment according to the present invention. In this figure, a boiler 1 includes a combustion burner 1a, a heat exchanger 1b that cyclically warms internal water to a high temperature using the heat generated by the combustion burner 1a, and a fuel supply section of the combustion burner 1a, which is incorporated in a control signal. The fuel controller 1c includes a fuel controller 1c that controls opening and closing of the fuel control valve, a water tank 1d, a circulation pump 1e, and thermistors 1f and 1g that send control signals to the fuel controller 1c. The fan convector 2 is a high temperature (approximately 70 to 80 degrees Celsius) heat radiator that is generally used for indoor heating, and is a heat radiation tube formed by bending inside a flat cabinet with an appropriate thickness. The air is sucked in through an air filter on the back, heated by high-temperature water passing through a heat radiation tube, and then sent out as warm air by a fan from a blow-off grill on the front. Note that instead of this fan convector, a high-temperature panel radiator of the type that hangs on a wall may be used. The floor heating panel 3 is a low-temperature (approximately 40 to 55 degrees Celsius) radiator used for floor heating, and has heat radiating tubes arranged through which hot water passes so that heat is evenly transmitted within the panel. be. Among these radiators, the fan convector 2 is connected via an outgoing pipe 4 so as to receive high-temperature hot water from the heat exchanger 1b, and the floor heating panel 3 is connected to its output side. The output side of the floor heating panel 3 is connected to the return port of the heat exchanger 1b via a return pipe 5. Note that a water tank 1d and a circulation pump 1e for circulating hot water are provided in the middle of the input side outgoing pipe 4 of the fan convector 2.

The thermistor 1f is attached to the outer periphery of the outgoing pipe 4 near the hot water outlet of the heat exchanger 1b, and senses the temperature of the hot water supplied to the fan convector 2.
A control signal corresponding to the temperature is sent to the fuel controller 1c. In addition, the thermistor 1g is connected to the heat exchanger 1b.
is attached to the outer periphery of the return pipe 5 near the hot water inlet of the fuel controller 1c, and sends a control signal according to the temperature to the fuel controller 1c.
Send to. The fuel controller 1c includes, for example, two sets of fuel adjustment valves, and receives control signals from the thermistors 1f and 1g to control the corresponding fuel adjustment valves, respectively.

The temperature control operation of the heating device configured as described above will be explained with reference to the graph of FIG. 2. Figure a shows a temperature control cycle for maintaining the floor heating panel 3 at an appropriate temperature regardless of whether or not the fan convector 2 is in operation. This example is a case where the temperature of water sent back from the return pipe 5 of the floor heating panel 3 is set to the reference value _t3 . First, the heat exchanger 1b is operated by the ignition of the combustion burner 1a, increasing the temperature of the water passing through the fan convector 2 and the floor heating panel 3. When the return water temperature exceeds _t3 , the temperature is detected by the thermistor 1g. The combustion burner 1a is controlled to a slight combustion state. Then, as shown in step A, when the temperature continues to rise further and reaches _t4 , the combustion burner 1a is extinguished. When the return water temperature drops below _t'2 due to this extinguishing, combustion burner 1 is activated as detected by thermistor 1g.
a ignites again. In addition, by providing a timer, step A of slight combustion when the return water temperature exceeds _t3
If this condition continues for 30 minutes, combustion burner 1
A can be extinguished.

Furthermore, in the above operation process, the combustion burner 1
When a is controlled to a slight combustion state, if the temperature decreases from _t3 as shown in step B, the combustion burner 1a returns from a slight combustion state to a full combustion state when it reaches _t'2 . Move on to control to increase water temperature.

By repeating such a control cycle, the floor heating panel 3 is maintained at an appropriate temperature. In this case, if the fan convector 2 is in the "on" state, the water temperature in the outgoing pipe 4 is automatically maintained high in anticipation of the temperature drop due to the fan convector 2,
When in the "off" state, the water temperature in the outgoing pipe 4 is maintained at a value that takes into account the decrease caused by the floor heating panel 3.

Fig. 2b shows a case where the fan convector 2 is operated continuously together with the floor heating panel 3, and the water temperature in the return pipe 5 has decreased to below t' ₂ in Fig. a even though the combustion burner 1a is ignited. This shows an example of control. In this state, temperature control is switched from control by thermistor 1G to control by thermistor 1f. Then, when the water temperature in the outgoing pipe 4 exceeds the set temperature _t6 and reaches _t7 in the ignited state of the combustion burner 1a, the combustion burner 1a is extinguished by detection by the thermistor 1f. As a result, when the forward water temperature decreases to _t'5 or less, the combustion burner 1a is ignited again as detected by the thermistor 1f. In addition, in the above, when the outgoing temperature exceeds the set temperature t ₆ and reaches t' ₆ or more, if this state continues for 30 minutes, the combustion burner 1a is extinguished to further precisely control the temperature. be able to.

[Effects of the invention] As is clear from the above explanation, according to the invention, the return water temperature is controlled via the sensing element for a plurality of radiators connected in series from high temperature to low temperature. This not only makes it possible to maintain the low-temperature radiator at an appropriate temperature even when the high-temperature radiator is stopped, but also saves piping and simplifies control functions by eliminating temperature control valves, etc. The effect of improving the economic efficiency of the system is significant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2a is a graph showing a temperature control cycle for maintaining the floor heating panel at an appropriate temperature regardless of whether or not the fan convector is in operation. Figure 2b
1 is a graph showing a control cycle when the fan convector is operated continuously together with the floor heating panel and the water temperature in the return pipe is lower than t' ₂ in FIG. In the figure, 1 is a boiler, 2 is a fan convector, 3 is a floor heating panel, 4 is an outgoing pipe, 5 is a return pipe, 1a is a combustion burner, 1b is a heat exchanger, 1c is a fuel controller, 1d is a water tank , 1e is a circulation pump, and 1f and 1g are thermistors.

Claims (1)

[Scope of Claim for Utility Model Registration] Water in a heat exchanger is cyclically heated to a high temperature by the heat generated by a burner that burns with fuel whose supply amount is controlled from a fuel regulator, and the water in the heat exchanger is heated to a high temperature on the input and output side of the heat exchanger. Hot water is supplied to a plurality of radiators connected in series in the order of high-temperature to low-temperature radiators in the circulation path, and the amount of fuel supplied is controlled by a pipe from the heat exchanger to the high-temperature radiator. In the heating device configured to perform heating according to the temperature detected by a water temperature sensing element attached to the fuel, another water temperature sensing element is attached to the return pipe from the low temperature radiator to the heat exchanger, and A heating device characterized in that the regulator further comprises means for controlling the amount of fuel supplied to the combustion burner in response to an output signal obtained from the other water temperature sensing element.