JPH0365864B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an element for detecting the thermal state of the environment in an air conditioner that provides a comfortable environment for humans.

Configuration of conventional example and its problems As shown in Fig. 1, this type of conventional thermal sensing element has a heating element 2 inside a cylindrical thermal resistor 11 with a height of about 120 mm and a diameter of about 36 mm. Then, a signal corresponding to the amount of heat generated from the heating element 2 is detected while keeping the surface or internal temperature of the thermal resistor 11 constant, or a signal corresponding to the amount of heat generated from the heating element 2 is detected while keeping the temperature on the surface or inside of the thermal resistor 11 constant. It was configured to detect the surface or internal temperature. In this configuration, the thermal resistor 11
However, since only the thermal resistance is considered and no consideration is given to the temperature propagation coefficient, that is, specific heat and specific gravity, the output of the thermal sensing element and the human There is no correlation between the sense of temperature and it is not possible to provide a comfortable environment. Furthermore, since the thermal resistor 11 is fixed, it is not possible to grasp the temperature sensation of a person in response to changes in the state of the person's clothing. Furthermore, in the case of the cylindrical thermal resistor 11 with a height of approximately 120 mm and a diameter of approximately 36 mm, in terms of heat balance between the thermal resistor 11 and the environment, the cylindrical diameter is small relative to the shape of the human body, so heat is generated by convection. There was a problem in that the transmission was excessive and a discrepancy with human temperature sensation occurred.

Purpose of the invention The present invention solves such conventional problems,
A compact and single thermal detection element detects the thermal state of the air-conditioned space, including fluctuations, and correlates with human comfort, taking into account the state of clothing, and operates the air conditioner to create a comfortable space. The purpose is to provide it easily.

Structure of the Invention In order to achieve this object, a heating element, a covering made of a jelly-like substance having a temperature propagation coefficient that roughly matches the temperature propagation rate of human skin and covering the heating element, and a sensor for detecting the temperature of the covering are provided. A thermal sensing element is provided, which includes a body, an outer cover attached to the cover, and a cover having a number of ventilation holes that transmit radiated heat to the outer cover and reduce airflow.
With this configuration, the heat generated by the heating element is transmitted to the cover and the outer cover, and is further transmitted through the cover to exchange radiation heat with surrounding objects and solar radiation, as well as convection heat with the surrounding air through the ventilation holes of the cover. Exchange. This heat transfer mechanism is configured to have a correlation with that of the human body, so the temperature of the covering body determined as a result of heat transfer is detected and the output is used to operate the air conditioner to create a comfortable space. It has the effect of providing.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

In the figure, 1 is the main body of the thermal detection element;
The heating element 2 is covered with a covering 4 made of a jelly-like material whose temperature propagation coefficient roughly matches that of the human skin, and the covering 4 is provided with a sensing member 3 made of a thermocouple for detecting the temperature of the covering 4. On the outside of the covering 4, an outer covering 5 made of a fibrous material whose temperature propagation coefficient roughly matches that of human clothing is disposed. Furthermore, the outer cover 5 has a large number of ventilation holes 6,
A cover 7 made of resin such as polyethylene that transmits radiant heat is provided. Reference numeral 8 denotes a support metal fitting, in which a power supply line 9 to the heating element 2 and a signal line 10 from the detection element 3 are provided.

In the above configuration, from the power supply line 9 to the heating element 2
The heat generated by the constant electric power supplied to the housing is transferred to the cover 4 and the outer cover 5 by conduction, and the radiation is transmitted from the outer surface of the outer cover 5 through the cover 7 and the ventilation holes of the cover 7. Heat is dissipated to the environment by convective heat transfer due to airflow passing through 6. The heat balance between the outer surface of the envelope 5 and the environment is expressed by the following equation.

Hg/Ag=αcg(Tg-Ta)+αrg(Tg-Tr)...(1) However, Hg: amount of heat dissipated from the outer surface of the sheathing Ag: outer surface area of the sheath αcg: distance between the sheath and the environment convective heat transfer coefficient αrg: radiation heat transfer coefficient between the envelope and the environment Tg: outer surface temperature of the envelope Ta: air temperature Tr: ambient radiation temperature On the other hand, the human body also generates heat due to radiation; is transmitted from the outer surface of the human body to clothing and radiated to the environment, so if only dry heat radiation is considered, the heat balance between the clothing surface of the human body and the environment is expressed by the following equation.

Hb/Ab=αcb(Tb-Ta)+αrb(Tb-Tr)...(2) However, Hb: Heat dissipated from the outer surface of the human body Ab: External surface area of the human body αcb: Convection heat between clothing and the environment Transfer coefficient αrb: Radiation heat transfer coefficient between clothing and the environment Tb: External temperature of clothing Ta: Air temperature Tr: Ambient radiation temperature Here, the radiation rate of the outer surface of the outer cover 5 is the radiation rate of the outer surface of the clothing. Since it roughly matches the
Equation (3) holds true.

αrg=αrb≡αr (3) Furthermore, the cover 7 has a space around the outer periphery of the outer cover 5 and has uniform ventilation holes 6 over the entire surface, so that airflow flowing through the ventilation holes 6 can be prevented. The airflow around the envelope 5 is attenuated significantly compared to the front airflow because it is attenuated by the fluid resistance at the vent hole and only a part of the front airflow enters. The convective heat transfer coefficient is a function of wind speed and diameter, and equation (4) holds true even if the diameter of the envelope 5 is made small.

αcg=αcb≡αc...(4) As is clear from equations (1) to (4), the following equation holds true.

Hg/Ag=Hb/Ab=αc(T-Ta)+αr(T-Tr)...(5) However, T: Outer surface temperature Furthermore, the coating 4 roughly matches the temperature propagation rate of the human skin. Since they are made of a jelly-like substance and the outer covering is also made of a fibrous material whose temperature propagation rate roughly matches that of clothing, the temperature behavior of the covering 4 and the outer covering 5 is equal to that of human skin and clothing.

Therefore, if the electric power supplied to the heating element 2 is supplied so that the amount of heat per outer surface of the covering 4 is equal to the amount of heat per outer surface of the human body, and the thermal state of the environment is equal, Equation (5) is satisfied. Therefore, the amount of heat dissipated per unit outer surface is the same for the outer covering and human clothing, and the amount of heat dissipated per unit outer surface is equal to that of the outer covering
Since the temperature behavior of the outer covering 5 is equal to that of the human skin and clothing, the temperature of the covering 4 and the temperature of the human skin are equal.

Since the comfort of a human being in a thermal environment depends on the temperature of the human body's skin, the comfort in that environment can be accurately evaluated by detecting the temperature of the covering 4 of the thermal sensing element.

Next, another embodiment of the present invention will be described using FIG. 4. In Fig. 4, the difference from the above embodiment is that the outer cover 5 is divided into two parts 5 and 5', and a claw 12 is provided on one side, and a socket 13 is provided on the other side, so that they fit together. The cover 7 is similarly divided into two parts 7 and 7', with a claw 14 on one side and a socket 15 on the other side, so that they fit together. By uncoupling the outer cover 5, the outer cover 5 becomes removable, and when the outer cover 5 is removed, it becomes possible to evaluate the environment on a naked body. By selecting and wearing one of the plurality of outer coverings available, it is possible to evaluate the environment in any clothing state.

Effects of the Invention As described above, the thermal sensing element of the present invention provides the following effects.

(1) The covering and outer covering are made of a jelly-like material whose temperature propagation rate roughly matches that of the human skin, ensuring comfort even at the start of air conditioning and during transient changes in the environment due to solar radiation, etc. The air conditioner can be evaluated and quickly controlled to a comfortable state, automatically providing a comfortable environment at all times.

(2) By wearing the outer covering, it is possible to evaluate the comfort considering the state of clothing on the human body, and a comfortable environment corresponding to real life is automatically provided.

(3) Since the structure is configured to equalize the effects of environmental conditions such as temperature, airflow, and radiation on the human body, airflow will not be overestimated.

(4) The structure is simple, and the effect can be obtained reliably at low cost.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a conventional thermal sensing element, Fig. 2 is a schematic perspective view of an embodiment of the thermal sensing element of the present invention, and Fig. 3 is a sectional view taken along line A-A' of the thermal sensing element.
FIG. 4 is an exploded perspective view of another embodiment of the same temperature sensing element. 1...Main body of the thermal detection element, 2...Heating element, 3
... Sensing body, 4... Covering body, 5... Outer covering body, 7...
…cover.

Claims (1)

[Scope of Claims] 1. A heating element, a covering made of a jelly-like material whose temperature propagation rate roughly matches that of human skin, and covering the heating element, a sensing element detecting the temperature of the covering, and A thermal sensing element comprising an outer cover attached to a covering, and a cover provided on the outer periphery of the outer cover and having a large number of ventilation holes. 2. The thermal sensing element according to claim 1, wherein the outer cover is made of a material that roughly matches the temperature propagation rate of clothing on a human body. 3. The thermal sensing element according to claim 1 or 2, wherein the outer cover is configured to be detachable. 4. The outer covering can be selected from a plurality of outer coverings corresponding to the state of clothing of the human body.
The thermal sensing element according to item 1 or 2.