JPH0719604A - Gas fan heater equipped with floor heating function - Google Patents

Abstract

PURPOSE:To ensure comfortable floor heating operation even with the less amount of heat radiation along a floor panel by determining the amount of combustion of a combustion apparatus corresponding to hot water temperature. CONSTITUTION:A temperature difference DELTAT(=Tw-Tr) between hot water temperature Tw detected by a hot water sensor 16 and room temperature Tr detected by a room temperature sensor is evaluated to judge whether or not the temperature difference DELTAT is beyond predetermined critical temperature Tc. Thereupon, when the critical temperature Tc is higher than the temperature difference DELTAT, the amount of heat radiation along a floor panel 12 is reduced. Hereby, the hot water temperature Tw is comtemplated to be rapidly raised that the amount of combustion of a burner is determined on the basis of a signal from the hot water sensor 16. As a result, surface temperature of the floor panel 12 is raised to avoid the generation of a trouble of uncomfortableness, thus ensuring combortable floor heating operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas fan heater with a floor heating function capable of controlling room temperature while maintaining comfort of floor heating regardless of the amount of heat radiation on the floor panel.

[0002]

2. Description of the Related Art In a conventional gas fan heater with a floor heating function, since the hot water temperature and room temperature are both low at the time of ignition (when heating is started), the combustion amount of a combustion device such as a burner is maximized and then the combustion amount is increased. Was gradually decreased to control the room temperature to be maintained near a predetermined set room temperature (for example, 22 ° C.).

[0003]

However, in this case, when the heat radiation amount on the floor panel is small (for example, when the room to be heated is large but the floor panel is small),
The hot water temperature rises more rapidly than room temperature, and when the temperature difference between the hot water temperature and room temperature exceeds a predetermined critical temperature, the surface temperature of the floor panel becomes too high, causing discomfort and even burns.

In view of the above circumstances, it is an object of the present invention to provide a gas fan heater with a floor heating function that enables comfortable floor heating operation even when the amount of heat radiation from the floor panel is small. To do.

[0005]

That is, according to the present invention, a gas is burned in a combustion apparatus, and the combustion gas is mixed with room air and blown out as warm air to perform warm air heating and at the same time pass water. In a gas fan heater with a floor heating function that heats a heat exchanger with the combustion gas and circulates hot water in the floor panel, a hot water sensor for detecting the temperature of the hot water and a room temperature for detecting room temperature Provided with a sensor, the hot water temperature detected by the hot water sensor, or when the temperature difference between the hot water temperature and the room temperature detected by the room temperature sensor is less than a predetermined critical temperature, based on the signal from the room temperature sensor The hot water temperature detected by the hot water sensor and the room temperature detected by the room temperature sensor are determined while determining the combustion amount of the combustion device. When the temperature difference is more than the critical temperature of configured to provide a combustion amount control means for determining a combustion quantity of the combustion device on the basis of a signal from the hot water sensor.

[0006]

With the above-described structure, the present invention operates so that the combustion amount of the combustion device is determined corresponding to the hot water temperature when the heat radiation amount in the floor panel is small.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an embodiment of a gas fan heater with a floor heating function according to the present invention, and FIG. 2 is A of FIG.
-A sectional view taken along line A, Fig. 3 is a hot water circuit diagram of the gas fan heater with a floor heating function shown in Fig. 1, Fig. 4 is a graph showing a room temperature control method when the rise in hot water temperature is moderate, and Fig. 5 is a hot water temperature. 5 is a graph showing a room temperature control method in the case where the temperature rises rapidly.

The gas fan heater 1 with a floor heating function according to the present invention has an exterior case 2 as shown in FIGS.
A reserve tank 3 is suspended in the outer case 2. In the reserve tank 3, water 5 for floor heating is stored, and a float 4 capable of constantly detecting the water level of the water 5 floats. A circulation pump 6 is installed below the reserve tank 3. on the other hand,
A combustion chamber 7 is provided on the right side of the reserve tank 3 in FIG. 1, and a burner 11 is provided in the combustion chamber 7.
A heat exchanger 9 is installed below the combustion chamber 7, and a blower fan 10 is installed below the heat exchanger 9. Further, as shown in FIG. 2, an indoor air intake 8 for directly taking in indoor air is provided on the combustion gas inlet side of the heat exchanger 9, and a warm air outlet is provided on the front surface of the outer case 2. 18 is formed.

As shown in FIG. 3, in the reserve tank 3, a floor panel 1 is passed through a circulation pump 6 and a heat exchanger 9.
2, a return pipe 13 that returns from the floor panel 12 to the reserve tank 3 is connected, and the return pipe 13 and the return pipe 15 are connected via a connecting pipe 14 embedded in the floor panel 12. It is connected. A hot water sensor 16, a bimetal switch 17 for preventing overheating, and a valve 19 are provided in the outflow pipe 13, and a bypass pipe 20 is connected between the outflow pipe 13 and the return pipe 15.

Since the gas fan heater with floor heating function 1 according to the present invention has the above-described structure, when the gas fan heater with floor heating function 1 is installed in a room to perform warm air heating and floor heating. , The burner 11 is ignited, the blower fan 10 is driven, and the circulation pump 6 is driven to move the water 5 in the reserve tank 3 into the outflow pipe 13 and the connecting pipe 14.
And through the return pipe 15 to and from the floor panel 12. Then, the air warmed by the burner 11, that is, the warm air, passes through the vicinity of the heat exchanger 9, and then is blown out from the warm air blowing port 18 to perform warm air heating. At the same time, the heat exchanger 9 is warmed by the passage of this warm air, so that the water 5 circulating in the floor panel 12 becomes hot water, and thus floor heating is performed.

Here, the room temperature control of the gas fan heater 1 with a floor heating function is performed by the microcomputer (not shown) incorporated in the gas fan heater 1 with a floor heating function as follows. That is, the microcomputer controls the room temperature to be maintained near a predetermined set room temperature (for example, 22 ° C.) by appropriately adjusting the combustion amount of the burner 11. At this time, a temperature difference ΔT (= Tw-Tr) between the warm water temperature Tw detected by the warm water sensor 16 and the room temperature Tr detected by a room temperature sensor (not shown) is calculated, and the temperature difference ΔT is a predetermined critical value. Temperature Tc (for example,
32 ° C) or higher. As a result, when the temperature difference ΔT is less than the critical temperature Tc (when ΔT <Tc), the amount of heat radiation in the floor panel 12 is large, so that the warm water temperature Tw rises slowly as shown in FIG. It is considered that the burner 11 burns in the burner 11 based on the signal from the room temperature sensor. Conversely, when the temperature difference ΔT is equal to or higher than the critical temperature Tc (when ΔT ≧ Tc),
Since the amount of heat radiated from the floor panel 12 is small, it is considered that the warm water temperature Tw rises rapidly as shown in FIG. 5, so that the surface temperature of the floor panel 12 is too high, which causes an unpleasant situation. In order to avoid it, the combustion amount of the burner 11 is determined based on the signal from the hot water sensor 16.

By performing such control, it becomes possible to use both floor heating and warm air heating in accordance with changes in the heating load of each of the floor panel 12 and the room.

[0014]

As described above, according to the present invention,
Combustion gas is burned by a combustion device such as a burner, and the combustion gas is mixed with indoor air and blown out as warm air to perform warm air heating, and at the same time, a heat exchanger that passes water is heated by the combustion gas to generate hot water. In a gas fan heater with a floor heating function that performs floor heating by circulating in the floor panel, a hot water sensor that detects the temperature of the hot water and a room temperature sensor that detects the room temperature are provided, and the hot water sensor detects the temperature. When the hot water temperature or the temperature difference between the hot water temperature and the room temperature detected by the room temperature sensor is less than a predetermined critical temperature, the combustion amount of the combustion device is determined based on the signal from the room temperature sensor, and the hot water When the temperature difference between the hot water temperature detected by the sensor and the room temperature detected by the room temperature sensor is equal to or higher than the critical temperature. The combustion amount control means such as a microcomputer for determining the combustion amount of the combustion device based on the signal from the hot water sensor is provided in the configuration, so that when the heat radiation amount in the floor panel is small, the combustion amount of the combustion device is reduced. Is determined according to the hot water temperature, it is possible to provide a gas fan heater with a floor heating function capable of performing a comfortable floor heating operation regardless of the amount of heat radiation from the floor panel.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a gas fan heater with a floor heating function according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a hot water circuit diagram of the gas fan heater with a floor heating function shown in FIG.

FIG. 4 is a graph showing a room temperature control method when a rise in warm water temperature is gentle.

FIG. 5 is a graph showing a room temperature control method when the warm water temperature rises rapidly.

[Explanation of symbols]

 1 …… Gas fan heater with floor heating function 5 …… Water for floor heating 9 …… Heat exchanger 11 …… Combustor (burner) 12 …… Floor panel 16 …… Hot water sensor Tc …… Critical temperature Tr …… Room temperature Tw …… Temperature of hot water ΔT …… Temperature difference

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadao Otake 2-18, Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A hot air heating is performed by burning gas in a combustor and mixing the burned gas with room air to blow out as warm air. At the same time, a heat exchanger for passing water is heated by the burned gas. In a gas fan heater with a floor heating function that performs floor heating by circulating hot water in the floor panel, a hot water sensor that detects the temperature of the hot water and a room temperature sensor that detects room temperature are provided, and the hot water sensor detects the temperature. The hot water temperature, or when determining the combustion amount of the combustion device based on the signal from the room temperature sensor when the temperature difference between the hot water temperature and the room temperature detected by the room temperature sensor is less than a predetermined critical temperature, The temperature difference between the hot water temperature detected by the hot water sensor and the room temperature detected by the room temperature sensor is not less than the critical temperature. A gas fan heater with a floor heating function, which is sometimes provided with a combustion amount control means for determining the combustion amount of the combustion device based on a signal from the hot water sensor.