JPH0230426B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of controlling a heating device having radiant heating means and forced convection heating means.

Conventional configurations and their problems In general, forced convection heating has sufficient heating capacity after the room temperature has stabilized, but because it is a method that heats indoor air, it takes time to feel comfortable at the start of operation. This has the disadvantage that the low temperature blown air gives a feeling of cold air, especially when the room temperature is still low. On the other hand, with radiant heating, the temperature of the radiant surface rises quickly, and if you get close to the radiant surface, you can feel the feeling of heating immediately after starting operation, but because the temperature and area of the radiant surface are limited, the capacity is small and the entire room unsuitable for heating. Furthermore, since the radiant heat comes from one direction, only part of the human body receives the radiant heat, which may widen the temperature distribution on the surface of the human body and cause discomfort.

The heating device that has both radiant heating means and forced convection heating means was developed to compensate for the drawbacks of both, but at the time of startup,
Since both heating means are started at the same time at their maximum capacity, there is a drawback that the heating effect of radiant heat is interfered with by the low-temperature blowing air.

Figure 1 shows these changes in the thermal sensation at startup, where a is radiant heating only, b is forced convection heating only, and c is radiant heating + forced convection heating. As is clear from this figure, the thermal sensation of radiant heating alone is quick, but it is conditional on being close to the radiant surface; if it is far from the radiant surface, the capacity is insufficient and the room temperature is low and the feeling of comfort will not last forever as shown in a'. I can't. In the case of forced convection alone, the user does not feel comfortable until the room temperature rises to a certain extent, and furthermore, when heating starts, the user feels uncomfortable due to the feeling of cold air. Forced convection + radiation exhibits characteristics between these two, and once the room temperature stabilizes, there will be no inconvenience due to insufficient capacity as with radiant heating alone, but the radiant heating effect at the time of startup will be hindered by the low-temperature blowing air. .

Purpose of the invention The present invention solves such conventional problems,
The purpose of this invention is to improve the sense of warmth at the start of operation of a heating device having radiant heating means and forced convection heating means, and to perform comfortable heating.

Structure of the Invention In order to achieve this object, the present invention includes a control device that has a radiant heating means and a forced convection heating means and that changes the ratio of the radiant heat radiation amount and the forced convection heat radiation amount every moment for a certain period of time after the start of operation. This control device controls the ratio of radiant heat dissipation and forced convection heat dissipation by setting the former large and the latter small at the start of operation, and gradually decreasing the former ratio and gradually increasing the latter ratio over time. It is something to do.

With this configuration, the capacity of the radiant heating means is set relatively high and the capacity of the forced convection heating means is set relatively low out of the total heating capacity at the start of operation, and as time goes on, the capacity of the former is lowered and the capacity of the latter is set. By increasing the temperature, heating is primarily performed using radiant heat that provides a warm sensation at the start of heating, and once the indoor thermal environment has stabilized, a forced convection method is primarily used to heat the entire room.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 to 6.

In the figure, reference numeral 1 denotes a main body of the heating device, which has a radiant panel 2 with a surface heating element on the front, and a blower 3 and an electric heater 4 inside. Furthermore, it has a blower motor 5, an inlet 6, and an outlet 7.

FIG. 4 shows a control circuit of the control device, which includes a first variable resistor 8 that controls the ratio of energization to the radiant panel 2 and the electric heater 4, and a first variable resistor 8 that operates in conjunction with the first variable resistor 8. A second variable resistor 9 for the blower motor 5, a variable resistor control motor 10 that controls the resistance values of the first and second variable resistors 8 and 9 (although not shown, each variable resistor 8, 9 and A timer 11 sets the operating time of the variable resistor controlled motor 10, a relay 12 for circuit self-holding, a timer circuit switch 13, and a main switch 14. Ru. In addition, when the power is OFF,
The first variable resistor 8 is set to be small on the radiant panel 2 side and large on the electric heater 4 side, and the resistance value of the second variable resistor 9 is made large accordingly. The main switch 14 and the timer circuit switch 13 are interlocked.

In the above configuration, when heating starts, first,
A large current flows through the radiant panel 2 side, and only a small current flows through the electric heater 4 and blower motor 5 sides. At this time, the variable resistor control motor 11 has started operating, and the ratio of the resistance values of the first variable resistor 5 on the radiant panel 2 side and the electric heater 4 side is gradually increased, and the resistance value on the radiant panel 2 side is gradually increased. The 4th side is gradually made smaller and changes every moment. At the same time, the resistance value of the second variable resistor 9 for the blower motor 5 is also gradually changed to a smaller value. Furthermore, timer 1
1 has been counting the time since the start of operation,
After the set time has passed, the variable resistor controlled motor 10
energization is stopped, and the resistance value of each variable resistor 8, 9 is fixed.

FIG. 5 shows the changes in each resistance value described above, and the accompanying changes over time in the input heat ratio of the radiant panel 2 and the electric heater 4, that is, the radiant heating means and the forced convection heating means, and the changes in the amount of air blown. Note that T is the set time of the timer 11.

As is clear from Fig. 5, heating is mainly performed by the radiant panel 2 at the beginning of startup.
When a resident approaches the device, a sense of warmth is obtained. At this time, although the capacity of the electric heater 4 is small, the amount of air blown is also small, so the feeling of cold air does not occur. However, if the capacity ratio remains as it is, the room temperature will rise slowly, the location of the occupants will be limited, and the occupants will feel uncomfortable because the radiant heat is only a part of their body.
After a warm sensation is obtained from the radiant heat, the heating capacity of the radiant panel 2 is gradually lowered, and the capacity of the electric heater 4 for forced convection heating is increased, and the air is blown so as not to cause a feeling of cold air. Gradually increase the air volume to increase the rate at which indoor air is heated, causing the room temperature to rise faster. Once the thermal environment throughout the room reaches a comfortable state, forced convection heating is used to maintain that state.

That is, at the beginning of operation, a sense of warmth is obtained through local heating, and then the entire room is heated, so that a tactilely comfortable state is maintained immediately after the start of operation.

FIG. 6 shows the rise of the warm sensation at this time.
Until time T, the human body feels a warm sensation near the radiant panel 2, and after time T, the entire room is heated, so that a comfortable feeling can be obtained in a wide range of the room.

In addition, in this example, the ratio of the amount of radiation heat dissipation and the amount of forced convection heat dissipation was changed linearly, but it was changed stepwise.
Alternatively, it may be changed non-linearly. Furthermore, the total heat amount of the radiant heat release amount plus the forced convection heat release amount may change over time.

Further, although electricity is used as the energy source in this embodiment, similar effects can be obtained with other energy sources such as gas and oil.

Effects of the Invention As described above, the heating device of the present invention provides the following effects.

(1) It has a radiant heating means and a forced convection heating means, and is equipped with a control device that changes the ratio of radiant heat radiation and forced convection heat radiation every moment for a certain period of time after the start of operation. By increasing the proportion of heat dissipation and decreasing the proportion of forced convection heat dissipation, and by decreasing the former proportion and increasing the latter proportion over time, radiant heat can be used to provide a warm sensation immediately when the room temperature is low at the beginning of startup. As the indoor temperature rises and the thermal environment stabilizes, forced convection heating is mainly used to heat the entire room, so it always feels comfortable from the moment the operation starts until after the room has stabilized. This has the effect of providing a state.

(2) Since the amount of radiant heat is gradually lowered, there is less discomfort caused by heating a part of the human body due to the directionality of radiant heat. At this time, the amount of heat dissipated by forced convection gradually increases and the room temperature rises, so the sense of warmth is not impaired.

(3) Since indoor air is heated by forced convection to an extent that does not cause an unpleasant feeling of cold air immediately after the start of operation, the room temperature rises more quickly than in the case of radiant heating alone.

(4) Since the system gradually shifts from radiant heating to forced convection heating, the heating effect of heating the occupants directly through radiant heat and the heating effect of warming the entire room through forced convection maintain the perceived temperature at a nearly constant level. Since the temperature changes slowly while maintaining the same combination, it is possible to obtain a natural heating effect.

[Brief explanation of drawings]

Fig. 1 is a characteristic diagram showing the rise of the thermal sensation in a conventional heating device, Fig. 2 is a perspective view showing an embodiment of the heating device of the present invention, and Fig. 3 is a graph shown in Fig. 2 A-A.
Line sectional view, Figure 4 is the electric circuit diagram of the control device, Figure 5 is the electrical circuit diagram of the control device.
The figure is a characteristic diagram showing the resistance value of each variable resistor in the electric circuit in Figure 4, the heating capacity of each heating means, and the time change of the air flow rate of the blower. It is a characteristic diagram showing the rise of feeling. 1...Heating device main body, 2...Radiation panel, 3...
...Blower, 4...Electric heater, 5...Blower motor, 8...First variable resistor, 9...Second variable resistor, 10...Variable resistor control motor, 11...
...Timer.

Claims (1)

[Claims] 1. A control device is provided which has a radiant heating means and a forced convection heating means and changes the ratio of the amount of radiant heat radiation and the amount of forced convection heat radiation almost continuously over time for a certain period of time after the start of operation, The control device includes a timer that counts the time at the start of operation, and a heat amount setting means that determines the amount of heat released by the radiant heating means and the forced convection heating means. In other words, at the start of operation, the proportion of radiant heat dissipation is set to be large and the proportion of forced convection heat dissipation is set to be small. A heating device with a large proportion of heat radiation.