JPH04174217A - Heating device - Google Patents

Abstract

PURPOSE:To realize heating operation through a combination of radiation heating and forced convective heating by a simple structure with considerations given to the interior conditions of a room by a method wherein an axial blower is made to rotate regularly when the detected temperature is lower than a predetermined temperature and, when it is not lower than the predetermined temperature, the axial blower is made to rotate reversely. CONSTITUTION:An axial blower 3 is regularly rotated until the interior temperature of a room detected by a thermister 5 reaches about 18 deg.C and a jet of the air drawn into the room from a heat exchanger 2 is directed against the front radiating plate 4 of a heating device 1 to heat its surface. The radiation heat-exchange of the radiating plate 4 thus heated with the objects in the room is conducted to warm the human body near the heating device 1. The flow of air running along the surface of the radiating plate 4 is sent out from the periphery of the heating device 1 to heat the air in the room. When the room temperature rises to about 18 deg.C, the axial blower 3 is made to rotate reversely to decrease the surface temperature of the radiating plate 4 approximately to the room temperature with loss of the radiation effect. The air flow which has passed through the heat exchanger 2 is sent out of the rear part of the heating device 1 and the heating is thereafter effected by convective heat radiation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heating device that uses both convective heat radiation and radiant heat radiation.

2. Description of the Related Art As shown in FIG. 2, a conventional heating device of this type includes a heat exchanger 2 inside a heating device body 1, a blower 3 for generating forced convection, and a heater on the surface of the heating device body 1. A radiant heat sink 4 consisting of an electric heater is provided. This configuration enhances comfort by taking advantage of the respective strengths of forced convection heating, which can raise the indoor air temperature, and radiant heating, which directly heats the human body.

Problems to be Solved by the Invention However, when trying to use forced convection heating and radiant heating depending on the indoor situation with the above configuration, there is a problem that Since each heat supply means is independent,
For example, complex controls such as turning on and off the electric heater and switching the heat medium flow path are required, and elemental parts such as switching valves are also required.

In addition, radiant heating has an excellent heating effect, and is most effective when used mainly when heating starts, and becomes unnecessary once the indoor air temperature rises and you can enjoy almost constant warmth no matter where you are. Become. On the contrary, it also has the disadvantage of causing discomfort due to the asymmetry of radiation, in which only one side of the human body becomes hot when it receives radiant heat from one direction. That is, the radiant heat vj, 4 may become a useless piece of equipment after the room temperature stabilizes.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to realize an operation using a combination of radiant heating and forced convection heating with a simple configuration, taking into account the indoor situation.

Means for Solving the Problems In order to achieve the above-mentioned objects, the present invention provides an axial flow blower that can switch between forward rotation and reverse rotation, and an axial flow blower that generates air when the axial flow blower rotates forwardly. A heat exchanger provided on the upstream side of the airflow, a radiant heat sink provided on the downstream side, a room temperature detection means for detecting indoor temperature, and a temperature detected by the room temperature detection means that is lower than a certain set temperature. and a control device that rotates the axial blower in the forward direction when the temperature is higher than the set temperature, and rotates the axial blower in the reverse direction when the temperature is higher than the set temperature.

Effect of the Invention With the above-described configuration, the present invention heats the radiant heat dissipation plate with the heated airflow to radiate heat at the start of operation when the indoor temperature is low. When the indoor temperature rises, the direction of rotation of the blower is reversed so that the indoor air is heated only by convective heat radiation without heating the radiant heat sink.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIG. As shown in the first section, the heating device main body 1 includes:
Heat exchanger 2, axial flow blower 3 that can be switched between forward and reverse rotation, radiant heat sink 4, thermistor 5 that detects indoor air temperature
, depending on the output level of the thermistor 5 as a control device, the axial flow velocity is 1! The controller 6 includes a control circuit for switching between forward and reverse rotation of the Ll 13.

In the above configuration, the operation will be explained. When the operation is started, the axial blower 3 rotates in the normal direction until the indoor temperature detected by the thermistor 5 reaches 18° C., and the air flow becomes as shown by the solid arrow. Indoor air sucked in from the heat exchanger 2 side is blown onto the radiant heat sink 4 on the front surface of the heating device main body 1, heating the surface. The heated radiant heat dissipation plate 4 exchanges radiant heat with objects in the room and provides a warming effect to the human body near the heating device main body 1. The airflow flowing along the surface of the radiant heat sink 4 is blown out from around the heating device main body 1 and heats the indoor air.

This takes advantage of the fact that when the room temperature is low, such as at the start of operation, the sensation of warmth builds up faster by radiant heat exchange with an object with a higher surface temperature than by increasing the air temperature.

After that, when the room temperature rises to 18°C and the required amount of heat radiation becomes smaller, the indoor air is heated and the radiant heat sink 4
When there is no longer a need for heating, the rotation of the axial blower 3 is reversed to switch the airflow as shown by the dotted line. As a result, the surface temperature of the radiant heat sink 4 drops to approximately the same level as the indoor air temperature, and the radiation effect disappears. The airflow that has passed through the heat exchanger 2 is blown out from the rear of the heating device main body 1, and thereafter heating is performed by convection heat radiation.

As described above, according to the heating device of one embodiment of the present invention, since the presence or absence of radiant heat radiation is controlled by switching the rotation direction of the axial blower 3 based on the room temperature, the heating effect by radiant heat radiation is also used at the time of startup. However, after the room temperature stabilizes, the room can be heated only by convection heat radiation. In other words, with a simple configuration of switching the rotation direction of the axial blower 3 between forward and reverse directions, a heating effect suitable for the indoor environment and the occupant's thermal sensation can be achieved from the start of operation to a stable state.

Effect of the invention As described above, according to the present invention, the following effects can be obtained.

The rotation direction of the axial blower can be switched based on the room temperature to select a combination of radiant heating and forced convection heating, so it is possible to select a combination of radiant heating and forced convection heating. It is possible to realize the operation to maintain indoor air temperature using only forced convection heating by simple means.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a heating device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional heating device. 1... Heating device body, 2... Heat exchanger, 3... Axial blower, 4... Radiation heat sink, End... Thermistor, 6...Controller. Name of agent: Patent attorney Akira Okaji and two others Figure 2 Figure 1 Niri 7 wife / 5゛-°length - Mr. 61 grade my# and

Claims (1)

[Claims] an axial blower capable of forward and reverse rotation, a heat exchanger provided on the upstream side of the airflow generated by the axial blower when the axial blower rotates forwardly, and a heat exchanger provided on the downstream side a radiant heat dissipation plate, a room temperature detection means for detecting indoor air temperature, and when the temperature detected by the room temperature detection means is less than a set temperature value, the axial flow blower is rotated in the normal direction; A heating device equipped with a control device that reversely rotates a flow fan.