JPS5921462B2 - heating/cooling machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heating/cooling device that combines radiation, natural convection, and forced convection by a blower, and improves comfort for the human body during heating and cooling by effectively using radiant heat. With the goal.

Conventionally, there are radiators such as panel heaters and panel radiators as alternatives to blower heating/cooling devices.

However, since these devices dissipate heat by radiation and natural convection without using a blower, they lacked power supply capabilities.

For this reason, raising the surface temperature of the equipment in an attempt to increase its capacity poses safety problems such as burns.

On the other hand, conventional equipment that uses only the air blowing method has the disadvantage that the airflow hits the human body, causing discomfort.

Therefore, an air-conditioning/heating machine that combines both types of heat dissipation by radiation and natural convection and heat dissipation by forced convection has been considered.

However, in these devices, there was no control relationship between the two types of heat dissipation, and both were controlled simultaneously by sensing the room temperature.

A thermally comfortable state for the human body is essentially achieved when the amount of heat dissipated from the human body, the room temperature (convection heat dissipation), and the radiant heat received by the human body are balanced.

In other words, for the human body, this balance (
There are countless points where the ratio of convective heat radiation to radiant heat can be determined, but in conventional control methods, room temperature and radiant heat are simultaneously controlled in the same direction, so only one point can be obtained.

For this reason, even if the room temperature is set to an appropriate temperature of around 24°C during heating, it will be too hot if the human body is receiving radiant heat.For this reason, if the room temperature is set lower, the amount of radiant heat received will also decrease. It turns out that it is too cold.

During this period, the temperature sensation for the human body varies greatly, and a comfortable state for the human body can only be obtained if the above-mentioned balance is found.

The present invention solves the above-mentioned conventional drawbacks, and one embodiment of its configuration will be described with reference to the drawings.

Reference numeral 1 designates a main body of a heating/cooling device, in which a surface heating element 2 which radiates heat by radiation and natural convection is provided on the front side, and a heat exchanger 3 which radiates heat by forced convection with a larger amount of heat than the surface heating element 2 inside; A blower 4 is provided.

A switch box 5 includes a main switch 6, a temperature changeover switch 7 for switching the surface temperature of the surface heating element 2 between high and medium low, a room temperature setting lever 8, and the like.

The room temperature setting lever 8 is connected to the surface heating element 2 via a spring 9.
The room temperature setting device 11 is normally set automatically by moving from a high temperature to a low temperature by expanding and contracting the bellows 10 depending on the temperature.

Further, the main body 1 is connected to the room temperature setting device 11 and
A thermosensitive cylinder 12 installed near the suction port 13 installed at the bottom of the unit detects the room temperature and controls forced convection heat radiation by the heat exchanger 3 and blower 4 (ON, OFF control, capacity control).
do.

Furthermore, even if the room temperature setting lever 8 is set automatically, each resident has a preference for the room temperature, so in this case, the room temperature setting lever 8 is inserted into the notch 14 of the room temperature setting scale to manually set the room temperature. I will do it.

In the above embodiment, FIG. 4 shows the amount of heat radiated from the surface heating element 2 at a room temperature of 20° C. and a surrounding wall temperature of 15° C.

In other words, even if the surface temperature of the surface heating element 2 is maintained at 100°C, the total number of calories shown by the solid line, which is the sum of the radiation heat radiation shown by the dotted line and the natural convection heat radiation shown by the dashed-dotted line, is only about 400 kcal/h, which is normally The heating load for a room of about 6 tatami mats is 15
00 to 2000 (kca7/h), this shortfall can be compensated for by forced convection heat radiation by the heat exchanger 3 and the blower 4.

Therefore, as shown in FIG. 5, which shows the relationship between the surface temperature of the surface heating element 2 and the room temperature setting, if the temperature selector switch 7 is set to high, the human body receives strong radiant heat from the surface heating element 2, while the surface heating element 2 When the bellows 10 detects the high temperature of 2, the room temperature setting lever 8 is moved to a lower direction, and the room temperature is automatically set to a lower value. The heat exchanger 3 and the blower 4 are activated by this signal.

Also, if you want to use a child's room at a lower surface temperature for safety reasons, you can set the temperature selector switch 7 to low.In this case, contrary to the above, the room temperature setting lever 8 moves to the high direction. is automatically set to a high value, and the lack of heat radiation of the surface heating element 2 is covered by forced convection, so that the human body can always obtain a constant sense of warmth.

Furthermore, even when the heat radiation by forced convection is controlled and turned off, the heat radiation by the surface heating element 2 and natural convection is still being performed, so that there is less variation in the thermal sensation experienced by the human body than in the past.

As described above, according to the present invention, comfortable heating and cooling can be performed by effectively combining heat radiation control by radiation and natural convection and heat radiation control by forced convection.

[Brief explanation of the drawing]

Fig. 1 is an external view of a heating/cooling device according to an embodiment of the present invention, Fig. 2 is a schematic sectional view taken along line AA' in Fig. 1, and Fig. 3 is a control section taken along line BB' in Fig. 1. FIG. 4 is a graph showing the amount of heat dissipated from the surface heating element, and FIG. 5 is a diagram showing the relationship between the surface temperature of the surface heating element and room temperature according to an embodiment of the present invention. 1...Main body, 2...Surface heating element, 3...
...Heat exchanger, 4...Blower, 7...
...Temperature changeover switch (temperature changeover), 11...
・Room temperature setting device.

Claims (1)

[Claims] 1 A heat exchanger and a blower installed inside the main body that radiate heat through forced convection, a surface heating element installed on the front of the main body that radiates heat through radiation and natural convection, and a temperature control device for manually switching the surface temperature setting of this surface heating element. A heating/cooling machine equipped with a switching device and a room temperature setting device that detects the surface temperature of a surface heating element and sets the room temperature.