JPS5921463B2 - 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.

Traditionally, heat radiators such as panel heaters and panel radiators have been used as an alternative to blower air conditioners, but these devices do not use blowers and dissipate heat through radiation and natural convection, so they lack absolute capacity. was.

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

In addition, since conventional equipment that uses only the ventilation method has the disadvantage that the airflow hits the human body and causes discomfort, we have developed a system that combines both methods, with heat radiation by radiation and natural convection, and heat radiation by forced convection. Ideas have been devised for air conditioners that combine heating and cooling functions.

However, in these devices, there is no control between the two types of heat radiation, and both types are controlled simultaneously by sensing the room temperature.

Essentially, a thermally comfortable state for the human body is achieved when the amount of heat dissipated from the human body is balanced with the room temperature and the radiant heat received by the human body.

In other words, for the human body, there are countless points to balance, such as when the room temperature is high and not receiving much radiant heat, or conversely when the room temperature is low and receiving a large amount of radiant heat, but the conventional control method described above Since the radiant heat and the radiant heat are controlled in the same direction at the same time, only one point can be obtained for that point.

For this reason, even if the room temperature is set to an appropriate temperature of around 24 degrees Celsius 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's too cold this time.

During this period, the temperature sensation for the human body fluctuates greatly, and a comfortable state for the human body can only be achieved 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 denotes a heating/cooling device main body according to the present invention, in which a surface heating element 2 which radiates heat by radiation and natural convection is provided on the front thereof, and a heat exchanger 3 and a blower 4 which radiate heat by forced convection are provided inside.

The circuit for detecting the room temperature and setting the surface temperature of the surface heating element 2 is as shown in FIG.
The surface temperature of the surface heating element 2 can be set using a variable resistor 7 using a thermistor sensor installed nearby to detect the room temperature.

A sensor 8 detects the surface temperature of the surface heating element 2, and is connected in series with the sensor 6.

9 and 10 are parallel resistors connected to the sensor 6°8,
Forms one piece of the temperature detection bridge.

11, 12, and 13 are fixed resistors that also form a temperature detection bridge; 14 is a comparator that receives a signal from the temperature detection bridge; and 15 is a differential feedback resistor.

16 is a transistor for noise prevention, and 17 and 18 are fixed resistors.

19 is a diode for transistor protection, and 20 is a no-coil.

The signals output by these are connected to the diode bridge 21
The normally open relay contact 23 is opened and closed via the transformer 22 to control the load 24 (blower 4).

In the above-described embodiment, when the variable resistor 7 is set to a low value, for example, to control the surface temperature of the surface heating element 2, when the voltage at point B is higher than the reference voltage at point A in FIG. The output turns on the transistor 16 and excites the relay coil 20.

Then, the relay coil 20 closes the normally open relay contact 23 to drive the load 24, and the blower 4 and heat exchanger 3 perform forced convection heat radiation.

In this way, forced convection heat radiation is performed and the room temperature is controlled. While the room temperature changes from a to b as shown in FIG. In the opposite direction, the surface temperature of the surface heating element 2 changes from C to e.

That is, even if the room temperature falls, the surface temperature of the surface heating element 2 rises and the occupant receives more radiant heat, thereby balancing the heat balance of the human body.

In addition, by changing the settings of the variable resistor 7 in the same way according to the resident's preference and clothing condition, for example, a medium setting can be set to d to d' as shown in curve B, and a strong setting can be set as shown in curve C. The set temperatures of C' to 'e and the surface heating element 2 can be controlled.

As explained above, the present invention controls radiant heat according to the room temperature in consideration of the heat balance of the human body, and has an extremely large value in contributing to the comfort of the human body during heating.

[Brief explanation of drawings]

Figure 1 is an external view of the heating/cooling machine according to the present invention, and Figure 2 is the
Figure A-t (schematic sectional view of the line, Figure 3 is an electric circuit diagram for setting the surface temperature of the surface heating element, and Figure 4 is a diagram showing the relationship between the surface heating element and room temperature. 1... Main body, 2... surface heating element, 3...
...Heat exchanger, 4...Blower, 6...
・Room temperature sensor (sensor).

Claims (1)

[Claims] 1 Equipped with a surface heating element installed on the front of the main body that radiates heat by radiation and natural convection, and a blower and heat exchanger installed inside the main body to radiate heat by forced convection, and installed inside or outside the main body to maintain room temperature. A heating/cooling device characterized in that the surface temperature of the surface heating element is set according to the room temperature detected by a sensor.