JPH02280037A - thermal environment sensor - Google Patents

Abstract

PURPOSE:To maintain an adequate heating state by providing a sensitivity adjusting film of a radiation heat transmission type on the external heat environment side of a heat resistor and adjusting the film thickness thereof so that the sensitive temps. of the body sensitivity and the heat environment sensor coincide with each other. CONSTITUTION:The sensitivity adjusting film 12a of the radiation heat transmission type is provided on the external heat environmental side of the heat resistor 11. The radiation heat arriving from the external heat environment at the heat environment sensor transmits the film 12a and is absorbed to the heat resistor 11 having the large absorptivitiy of the radiation heat and is thereby converted to heat energy. This energy is accumulated in the resistor 11 to increase the temp. thereof and to change the output of the temp. sensor 14. Part of the heat is released to the external heat environment. The radiated heat energy is proportional to the thickness of the film 12a. On the other hand, the output of the sensor 14 is inputted to an air conditioner and is utilized for the control. The sensitive temps. of the body sensitive temp. and the heat environment sensor are, therefore, made to coincide with each other by adjusting the thickness of the sensitivity adjusting film, by which the adequate heating state is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal environment sensor, and more particularly to a thermal environment sensor equipped with a heated thermal resistor.

[Prior art]

If the operating state of air conditioning equipment is controlled simply based on the output of a temperature sensor, elements such as heat radiation from walls or airflow will not be reflected in the external thermal environment. Therefore, some methods have been adopted in which, for example, a microcomputer or the like calculates the output of each sensor for each thermal environment element (temperature, radiation, airflow, etc.) to obtain an appropriate control signal. The configuration was complicated and it was disadvantageous in terms of cost. Therefore, control is performed using a thermal environment sensor as described in, for example, Japanese Patent Publications Nos. 56-10538 and 60-12569. That is, as shown in FIG. 6, the thermal resistor 11 is heated by the heater 13, and the temperature of the thermal resistor 11 is measured by a temperature sensor placed in contact with either the internal or external surface. The purpose is to control the external thermal environment by controlling air conditioners and the like based on the temperature.

In the above configuration, there are two methods: one is to maintain the thermal resistor 11 at a constant temperature near human body temperature, and the other is to supply a constant amount of heat from the heater 13 regardless of the temperature of the thermal resistor 11. The heated thermal resistor 11 transmits the radiant heat from the wall etc. and the influence of airflow to the temperature sensor 14, and the temperature can be controlled based on comprehensive temperature information including these elements as well as the air temperature. The thermal environment sensor has the advantage of being simple in configuration and can reduce the cost of the entire system.

[Problem to be solved by the invention]

However, according to the above configuration, it is difficult for the thermal resistor 11 to absorb thermal radiation from a wall or the like, and it is difficult to quickly reflect the influence on the temperature sensor 14.

For example, if there is a considerable amount of heat radiation from the wall surface, and the sensible temperature rises, the air conditioner is still in the heating state, or even if the wall surface has cooled considerably and the heat radiation has decreased, the air conditioner is still in the cooling state. In some cases, there may be a discrepancy between the actual sensible temperature and the sensitivity of the thermal environment sensor. This deviation tends to occur during a transitional period when the external thermal environment is changing, for example, at the beginning of operation of an air conditioner.

The present invention has been proposed in view of the above-mentioned conventional circumstances, and an object of the present invention is to match the sensible temperature with the sensitive temperature of a thermal environment sensor.

[Means to solve the problem]

A thermal environment sensor comprising a heater, a thermal resistor disposed on the external thermal environment side of the heater, and a temperature sensor 14 disposed inside or on the inner surface of the thermal resistor or in contact with the heater. A sensitivity adjustment film 12 is arranged on the thermal environment side of the body.

When adjusting the sensitivity to radiant heat, for example, Fig. 1,
As shown in FIG. 2, a radiant heat transmitting type thermal resistor 12a or a color film 12b is used as the sensitivity adjustment film 12. Also, if you are trying to adjust the sensitivity to airflow,
A wire body 12c is used as a sensitivity adjustment membrane.

[For production]

A radiant heat transmission type thermal resistor 12a is used as the thermal sensitivity adjustment film 12.
In the case of using the radiant heat transmitting type thermal resistor 12a, the radiant heat from the wall or the like becomes heat on the surface of the thermal resistor 11. When the thermal resistance of the transmission type thermal resistor 12a is small, the amount of heat released to the external thermal environment is large, and the amount of heat stored in the thermal resistor 11 is small.Therefore, the effect on the output of the temperature sensor 14 is is small, resulting in overheating.

As the thermal resistance of the transmission type thermal resistor 12a increases, the amount of heat stored in the thermal resistor 11 increases, increasing the output of the temperature sensor +4 and creating an appropriate heating state.

When a colored film is used as the sensitivity adjustment film 12, the degree to which radiant heat is absorbed (reflected) differs depending on the color, and therefore the temperature of the thermal resistor 11 also varies depending on the color of the colored film, which affects the sensitivity. Can be adjusted.

Elements that affect the sensitivity of thermal environment sensors include airflow in addition to radiant heat. Therefore, by arranging the net 12C on the surface of the thermal resistor 11 and adjusting the thickness of the net 12C, the influence of the airflow can be alleviated and adjusted.

〔Example〕

FIG. 1 shows one embodiment of the invention.

A radiant heat transmitting type thermal resistor 12 is arranged on the external thermal environment side of the thermal resistor 11 . In this configuration, the radiant heat that reaches the thermal environment sensor 10 from the external thermal environment is transmitted through the transmission type thermal resistor 12a, and the thermal resistor 1 has a high absorption rate of radiant heat.
1 and converted into thermal energy on the surface of the thermal resistor 11 on the thermal resistor 12a side. This thermal energy is
It is accumulated in the thermal resistor 11 and increases its temperature, changing the output of the temperature sensor 14, and a part of it is accumulated in the thermal resistor 12.
a to the external thermal environment.

Here, the heat energy released to the external thermal environment is inversely proportional to the thermal resistance of the thermal resistor 12a, in other words, the thickness of the thermal resistor 12a. Therefore, if the thermal resistor 12a is extremely thin, most of the thermal energy generated at the interface with the thermal resistor 11 will be released to the external thermal environment, but the thickness of the thermal resistor 12a will increase. As the temperature increases, the amount of heat accumulated at the interface increases, and the temperature of the thermal resistor 11 increases accordingly.

FIG. 5 shows the state of the thermal environment using the thermal environment sensor 10 configured as described above. The output of the temperature sensor 14 of the thermal environment sensor 10 is input to the air conditioner 20 and used to control the air conditioner. In addition, in Figure 5, 3
0 is a sensory measuring device having the same configuration as the thermal environment sensor 10, 4
0 is a temperature sensor.

FIG. 4 shows a state in which the air conditioner is controlled using the output of the thermal environment sensor 10. The broken line is the output of the sensible temperature measuring device 30 in FIG. 5, that is, the measuring device incorporating the thermal environment sensor 10 of the present invention,
As the thermal resistance of 2a becomes thicker (thickness increases), the characteristics change in the direction of the dashed arrow.The solid line is the temperature measured by the temperature sensor 40, and goes in the direction of the tip of the arrow as above. Accordingly, the thickness of the thermal resistor 12a increases.

As is clear from this graph, when the thermal resistor 12a is thin, overheating is likely to occur, for example, as shown by the solid line (■), but this phenomenon can be prevented by adjusting the thickness of the thermal resistor 12a. It can be resolved.

FIG. 2 shows a case where a color film 12b is used as the sensitivity adjustment film. According to this configuration, when a color that easily absorbs radiant heat is used for the color film 12b, the characteristics in the direction of the arrow in FIG. Characteristics close to those at the proximal end can be obtained.

FIG. 3 shows another embodiment of the present invention, in which a net for mitigating the influence of airflow is arranged as a sensitivity adjustment film on the surface of the thermal resistor 11 facing the external thermal environment.

According to this configuration, the smaller the mesh size of the net 14 or the thicker the net 14, the more the influence of airflow is alleviated.

[Brief explanation of drawings]

Figures 1, 2, and 3 are conceptual diagrams showing one embodiment of this invention, Figure 4 is a conceptual diagram of thermal environment measurement using a thermal environment sensor, and Figure 5 is a temperature diagram using this invention. A graph showing the state of the control, and FIG. 6 is a conceptual diagram showing a conventional example. In the figure, 11... thermal resistor, 12... sensitivity adjustment film, 13
...Heater, 14...Temperature sensor diagram

Claims (1)

[Claims] [1] Consisting of a heater, a thermal resistor placed on the external thermal environment side of the heater, and a temperature sensor placed inside or on the inner surface of the thermal resistor or in contact with the heater. A thermal environment sensor, characterized in that a sensitivity adjustment film is disposed on the external thermal environment side of the thermal resistor. [2] The thermal environment sensor according to claim 1, wherein the sensitivity adjustment film is a radiant heat transmission type thermal resistor. [3] The thermal environment sensor according to claim 1, wherein the sensitivity adjustment film is a colored film that absorbs radiant heat of a specific wavelength. [4] The thermal environment sensor according to claim 1, wherein the sensitivity adjustment film is a mesh.