JPH10103745A - Detecting device of thermal environment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detecting device of a thermal environment which is subjected to no limitation on a place of installation and which enables attainment of a PMV value of high accuracy. SOLUTION: In a detecting device of a thermal environment which has a temperature sensor 35, an airflow sensor 34, a humidity sensor 39 and a radiation heat sensor 36 and detects a PMV value being an index of the thermal environment on the basis of results of detection obtained from these sensors, the sensors are disposed in the same unit and also at positions where they do not interfere with one another. Since the sensors are disposed in the same unit, a thermal environment detecting unit 30 of the detecting device of the thermal environment being small in size and easy to install can be realized, and since the sensors are disposed at the positions where they do not interfere with one another, in addition, the results of detection of the individual sensors which reflect the thermal environment excellently can be obtained. Thereby the PMV value of high accuracy can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal environment detecting device, and can be applied to, for example, an air conditioner that detects indoor thermal environment information and maintains the indoor environment optimally.

[0002]

2. Description of the Related Art Conventionally, a predictive mean voting (PMV) indicating the comfort of an indoor environment has been obtained, and the PMV is calculated.
There is an air conditioner that controls an air conditioner such as an air conditioner based on V to maintain an optimal indoor environment. In this type of air conditioner, the room temperature,
It is necessary to measure radiant heat, airflow, and humidity. Here, a thermal environment detecting device is used to measure the temperature, radiant heat, airflow, and humidity in the room.

FIG. 8 shows an example of such a thermal environment detecting device. The main body of the thermal environment detecting device 1 is supported by a tripod 2. The main body of the apparatus includes a humidity sensor 3, a radiation sensor 4, a temperature sensor 5, and an air flow sensor 6, and a calculation unit and a display unit 7 for calculating a PMV value based on detection results obtained from the sensors. And a computer 9 having a unit 8.

When calculating this PMV value, a computer 9
The calculation unit inside calculates the sensible temperature based on the air temperature, the radiation temperature and the airflow, and calculates the PMV value based on the sensible temperature and humidity, the amount of clothes and the amount of activity. Specifically, the perceived temperature
[° C] is teq, activity [met] is Met, clothing [clo] is Ic
l, when the water vapor pressure [pa] is pa, the temperature [° C] is ta, the humidity is RH, and the skin surface temperature [° C] is tsk, the PMV value is as follows: PMV = ｛0.303 × exp (-0.036 × Met × 58.15) +0.028｝ × [10.29 + 49.52 × Met−0.78 × tsk + 0.0814 × Met × ta + (0.407 + 0.133 × Met) × RH × pa × 0.01 −0.42 × (Met−1) − ｛ 8.996 / (1 + 1.466 × Icl)｝ (1) × (tsk−teq)] where tsk = 35.7−0.0275 × Met × 58.15.

[0005]

However, in the conventional thermal environment detecting device 1 as shown in FIG. 8, as is apparent from the drawing, there is a disadvantage that the installation location is restricted because the entire device is large. there were. Incidentally, the thermal environment detection device 1 is mainly used for temporarily measuring the indoor thermal environment, and is not always installed indoors to control the air conditioning equipment.

On the other hand, conventionally, a thermal environment detecting unit 10 as shown in FIG. 9 has been proposed in Japanese Patent Laid-Open No. Hei 5-87693. Here, the thermal environment detection unit 10 includes a sensor unit 11, an operation unit 12, and a display unit 13,
The overall structure is very compact. Thus, the thermal environment detection unit 10 can be installed on, for example, a wall surface in a room, and is hardly restricted by an installation place.

Here, the sensor section 11 has a detection element (control element) having a configuration having a heat resistor and a heating source inside the sensor section, which is arranged in a warm environment, and the temperature of the surface or the inside of the heat resistor is controlled by the heating source. Detecting a signal corresponding to the amount of heat dissipated from the detection element while maintaining a constant or detecting a signal corresponding to the surface or internal temperature of the thermal resistor while maintaining a constant amount of heat generated from the heating source, The air conditioner is operated by any of these detected signals, and the thermal environment is controlled so that the detected signals become constant.

Specifically, the sensor section 11 is configured as shown in FIG. That is, the sensory temperature calculation circuit 1
The surface temperature set value S1 is sent from 5 to the surface temperature control unit 16, and the surface temperature control unit 16 outputs a heater current output S2 corresponding to the surface temperature set value S1 to the heater 18 of the detection unit 17. The surface temperature control unit 16 receives the surface temperature detection value S3 detected by the surface temperature detection unit 19 provided near the heater 18, and the surface temperature control unit 16 sets the surface temperature detection value S3 to the surface temperature setting. A heater current output S2 that is equal to the value S1 is output.

The heater current output S2 is supplied to the sensible temperature calculating unit 15, and the sensible temperature calculating unit 15 is supplied with the temperature information S4. The sensible temperature calculator 15 calculates the sensible temperature S5 based on the heater current output S2 and the temperature information.
And sends it to the control unit of the air conditioner.

However, the processing by the thermal environment detection unit 10 is, in a nutshell, for obtaining the sensory temperature S5 as a value approximating the PMV value, and basically, a value approximating the PMV value is obtained. However, in actuality, when any one of the radiation temperature, temperature, humidity, and wind speed changes, the temperature sensor is compared with a PMV value that changes immediately in response to the change. Compared to the thermal environment detection device 1 shown in FIG. 8, a sudden change results in a detection result far from the actual PMV value.

As described above, the thermal environment detecting device 1 as shown in FIG. 8 has a drawback that the installation location is restricted while the PMV value can be detected with high accuracy, and as shown in FIG. The thermal environment detection unit 10 has disadvantages that it is not detected as a PMV value while being not restricted by an installation place, and has poor response to a sudden change.

The present invention has been made in view of the above points, and it is an object of the present invention to propose a thermal environment detecting device capable of obtaining a high-accuracy PMV value without limiting the installation place.

[0013]

Means for Solving the Problems A thermal environment detecting apparatus according to a first aspect of the present invention, which has been made to solve the above problems, has a temperature sensor, an airflow sensor, a humidity sensor, and a radiant heat sensor. In a thermal environment detection device that detects a PMV value that is an index of a thermal environment based on a detection result obtained from each sensor, the sensors are arranged in the same unit, and the sensors are arranged in positions that do not interfere with each other. did.

In the above construction, since the sensors are arranged in the same unit, a thermal environment detecting unit of a thermal environment detecting device which is small and easy to install can be realized. In addition, the sensors are arranged at positions where they do not interfere with each other. Therefore, it is possible to obtain a detection result in which the thermal environment of each sensor is properly reflected, so that a highly accurate PMV value can be obtained. By the way, if the sensors are arranged in the same unit in a dark manner, for example, the heat generated from a certain sensor will adversely affect other sensors, and it will be impossible to obtain a good detection result.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the unit has a multi-stage structure, and the temperature sensor and the airflow sensor are provided on the same step and the heat generated from the airflow sensor is reduced. Arranged at a position that does not adversely affect the temperature sensor, and a humidity sensor is arranged at a step different from the step where the temperature sensor and the airflow sensor are arranged,
The radiant heat sensor is arranged on a step different from the step where the temperature sensor and the airflow sensor are arranged and the step where the humidity sensor is arranged.

In the above configuration, since each sensor is arranged on a different step, it is hardly affected by heat generated from other sensors, and a good detection result can be obtained.

According to a third aspect of the present invention, there is provided a thermal environment detecting apparatus according to the second aspect, wherein a step portion on which a temperature sensor and an airflow sensor are disposed, a step portion on which a humidity sensor is disposed, and a radiant heat sensor. Are insulated by a heat insulating member.

In the above configuration, since each sensor is cut off by the heat insulating member, it is less likely to be affected by heat generated from other sensors, and as a result, a better detection result can be obtained. become.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, the unit comprises a first base having a cylindrical outer shape and a first base having an outer shape of a first base. A second base portion formed on the upper surface of the first base portion such that the center position is in the shape of a column having a smaller radius than the radius, and the center position thereof coincides with the center position of the first base portion; The temperature sensor and the airflow sensor are disposed on the upper surface of the first base portion and at a position apart from each other so that heat generated from the airflow sensor does not adversely affect the temperature sensor. The humidity sensor is located inside the first base portion. And the radiant heat sensor is arranged on the upper surface of the second base.

In the above configuration, the sensors can be arranged in a small unit space that does not interfere with each other.

In the thermal environment detecting device according to the fifth aspect, in addition to the constitution of the fourth aspect, the second base portion is formed by a heat insulating member.

In the above configuration, the heat generated from the radiant heat sensor is hardly transmitted to the temperature sensor, and the heat generated from the airflow sensor and the humidity sensor is hardly transmitted to the radiation sensor.

According to a sixth aspect of the present invention, in addition to the configuration of the fourth or fifth aspect, the temperature sensor and the airflow sensor are formed by a half of the first base on which the humidity sensor is disposed. The first base portion is arranged on the upper surface of the other half of the first base portion.

In the above configuration, it becomes difficult for heat generated from the humidity sensor to be transmitted to the temperature sensor and the airflow sensor.

The thermal environment detecting device according to the seventh aspect of the present invention has the structure of the fourth, fifth or sixth aspect,
A plurality of airflow sensors are provided on the upper surface of the first base.

In the above configuration, when the wind direction changes due to the influence of the second base portion, a different sensor output is obtained from each of the airflow sensors. Wind direction can also be detected.

[0027] Further, the thermal environment detecting apparatus according to claim 8 is characterized in that, in addition to the constitution of claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, or claim 7, radiant heat is detected. The outer shell covering the sensor was colored in a color suitable for the environment in which the unit was mounted.

In the above configuration, since the outer shell is colored in a color suitable for the environment in which the unit is mounted, the unit provided with each sensor can be installed without being noticeable in the environment.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2,
Numeral 30 denotes the thermal environment detecting unit of the embodiment as a whole, wherein the outer shape is a first base portion 31 having a cylindrical shape, and the outer shape is a cylindrical shape having a smaller radius than the radius of the first base portion 31, A second base portion formed on the upper surface of the first base portion so that the center position thereof coincides with the center position of the first base portion;

An airflow sensor 3 is provided on the upper surface of the first base 31.
3, 34 and a temperature sensor 35 are arranged at predetermined intervals. In addition, of the two airflow sensors 33 and 34,
The airflow sensor 33 is a temperature compensation sensor for compensating the temperature of the airflow sensor 34.

Here, the airflow sensors 33 and 34 have a self-heating type thermistor configuration, and detect an airflow velocity by monitoring a change in resistance value when the thermistor is self-heated. In other words, the higher the airflow velocity, the lower the temperature of the thermistor, so its thermal resistance decreases,
The current flowing through the thermistor increases. Accordingly, since the airflow velocity and the current value are in a proportional relationship, the airflow velocity can be obtained based on the current value.

In the temperature sensor 35, a ceramic semiconductor whose resistance changes with temperature and has a negative temperature coefficient of resistance is used as a temperature detecting element, and the ceramic semiconductor is glass-coated. The glass-coated ceramic semiconductor is embedded in a tube having a stainless steel tube at the tip.

On the upper surface of the second base 32, a radiation sensor 36 is provided. As shown in FIG. 2, the radiation sensor section 36 has a radiation sensor 3 in a hollow portion inside a hemispherical outer shell 37.
8 are stored. The radiation sensor unit 36 has an atmosphere (floor,
Infrared rays radiated from the ceiling, walls, human, etc.)
By detecting the temperature in the hollow portion, which rises in accordance with the amount of infrared light as a result, by the radiation sensor 38,
The radiant temperature is detected.

In the case of this embodiment, the outer shell 37 is formed by applying an ivory acrylic resin to the surface of an aluminum case. Compared with the case where the surface color of 37 is black or the like, it is compatible with the indoor environment and can be installed in the room inconspicuously. Note that the radiation sensor 38 is a glass sensor coated with a ceramic semiconductor similarly to the temperature sensor 35 described above.

By the way, in the conventional thermal environment detecting device 1 as shown in FIG. 9, the globe spheres constituting the radiation sensor section are black in consideration of the infrared emissivity, and are very There was a drawback that it was noticeable.
As in this embodiment, the outer shell 3 of the radiation sensor unit 36
Experiments have shown that even when 7 is ivory color, as will be described later, a radiation temperature equivalent to that obtained when the outer shell 37 is black can be obtained.

A humidity sensor 39 is provided in a hollow portion in the first base portion 31. The humidity sensor 39 has a self-heating thermistor type absolute humidity sensor configuration. The principle is that a current is first passed through the thermistor to place the thermistor in a heated state higher than the ambient temperature. Here, the temperature of the thermistor self-heated to about 200 [° C.] changes in the state of heat dissipation due to the thermal conductivity of the surrounding gas, and the resistance value changes accordingly. That is, since the thermal conductivity of steam and that of dry air are different, the thermal conductivity changes according to the amount of water vapor in the dry air. Therefore, the self-heating temperature of the thermistor changes depending on the humidity. Therefore, the resistance value of the thermistor changes with the change of the self-heating temperature, so that an electric signal corresponding to the humidity can be obtained. The surface of the first base portion 31 is partially cut out (not shown) so that the humidity inside the hollow portion where the temperature sensor 39 is provided becomes the same as the outside humidity.

The air flow sensors 33 and 34, the temperature sensor 35,
A radiation sensor 38 and a humidity sensor 39 are electrically connected to a circuit board 40 provided in the first base 31;
Each sensor output is amplified by an amplifier circuit (not shown) provided on the circuit board 40 and sent to a control unit (not shown) for controlling the air conditioner.

As shown in FIG. 1A, the thermal environment detecting unit 30 of this embodiment has a first base 31
A, the height of the first base portion 31 is b, the height of the second base portion 32 is c, and the height of the outer shell 37, that is, the outer shell 3
7 as d, a = 90 [mm], b = 26.
5 [mm], c = 18.5 [mm], and d = 25 [mm], which are very compact.

Here, the air flow sensor 34 and the temperature compensating air flow sensor 33 are installed at a position separated from each other by a circumferential angle of 30 ° around the center of the first base 31, and the air flow sensor 34 and the temperature The sensors 35 are arranged at a circumferential angle of 120 °. This makes it difficult for the heat generated by the airflow sensor 34 to be transmitted to the temperature sensor 35, so that the temperature sensor 35 can accurately detect the indoor temperature without being affected by the heat generated by the airflow sensor 34.

The reason why the airflow sensor 34 and the temperature compensation airflow sensor 33 are arranged at a position having a circumferential angle of 30 ° is that the temperature compensation airflow sensor 33 is too far from the detection airflow sensor 34. If it is arranged at a position, the airflow sensor 34 cannot be temperature-compensated by the temperature compensation airflow sensor 33 by the nearby temperature, and if the temperature compensation airflow sensor 33 is arranged very close to the airflow sensor 34 for detection, self-heating will occur. This is because the influence of the heat generated by the airflow sensor 34 is greatly affected, and the temperature cannot be compensated by the nearby temperature.

Thus, in the thermal environment detecting unit 30, the airflow sensor 34 and the temperature compensating airflow sensor 33 are arranged at a position having a circumferential angle of 30 °, so that the airflow sensor 34 can be accurately determined by the temperature in the vicinity. The temperature can be compensated and an accurate airflow velocity can be detected. Incidentally, the positions of the airflow sensor 34 and the airflow sensor 33 for temperature compensation are not limited to the position where the circumferential angle is 30 °, and the airflow sensor 33 functions as a temperature compensation for the airflow sensor 34 as described above (that is, the airflow sensor 34). The position may be located at a position where the circumferential angle is larger or smaller than 30 °, for example, at a position where the influence of the heat generated by the airflow sensor 34 is small.

In the thermal environment detecting unit 30, the humidity sensor 39 detects the thermal environment detecting unit 30 by, for example, the first base unit 3 by a dashed line BB 'in FIG.
In the case where 1 is divided into two, they are arranged in one half, and the air flow sensors 33 and 34 and the temperature sensor 35 are arranged in the other half where the humidity sensor 39 is not arranged. It has been done. Thus, in the thermal environment detection unit 30, the temperature sensor 35 and the airflow sensor 33 for temperature compensation are not adversely affected by the heat generated by the humidity sensor 39.

Further, in the thermal environment detecting unit 30, as shown in FIG. 2, a heat insulating member 41 is filled in the second base portion 32, so that the radiation sensor portion 36 is provided.
The heat generated in the outer shell 37 does not adversely affect the sensor section.

Further, the airflow sensor 34 for self-heating and the airflow sensor 33 for temperature compensation and the temperature sensor 35 which dislike the influence of heating are arranged on the same plane. The radiation sensor section 36 is not on the same plane, and the temperature compensation airflow sensor 33 and the temperature sensor 35 and the humidity sensor 39 are not on the same plane. An adverse effect of the heating on the compensation airflow sensor 33 and the temperature sensor 35 can be further reduced.

Thus, in the thermal environment detecting unit 30, even when the airflow sensor, the temperature sensor, the radiation sensor, and the humidity sensor are arranged in a very small unit, the temperature generated by the airflow sensor, the humidity sensor, and the radiation sensor unit is used. The sensor can be prevented from being erroneously detected differently from the room temperature.

Next, a description will be given of a thermal environment detecting device for obtaining a PMV value based on the detection result obtained by the thermal environment detecting unit 30. As shown in FIG. 3, the thermal environment detection device 50 includes the above-described thermal environment detection unit 30, an operation unit 51, and a computer unit 52. Here, the radiation temperature, the airflow velocity, the air temperature, and the humidity obtained by the thermal environment detection unit 30 are supplied to the calculation unit 54 via the input unit 53 of the computer 52, and the activity amount and the clothing set by the operation unit 51 Is supplied to the calculation unit 54 via the input unit 53. The calculation unit 54 calculates the PMV value by performing the calculation shown in the equation (1), and sends it to the display / output unit 55.

According to the above configuration, the temperature sensor 35, the airflow sensor 34, and the airflow sensor 33 for temperature compensation are arranged on the same plane, and the temperature sensor 35 and the airflow sensor 34
And the air flow sensor 34
And the airflow sensor 33 are arranged at a predetermined distance from each other, and the humidity sensor 39 is located on a plane different from the temperature sensor 35.
By arranging the radiation sensor unit 36 and the thermal environment detection unit 30, it is possible to realize the thermal environment detection unit 30 capable of obtaining a small and highly accurate PMV value.

The surface color of the outer shell 37 of the radiation sensor unit 36 is set to a color such as ivory which is suitable for the wall surface of the room in which the thermal environment detecting unit 30 is mounted.
The thermal environment detection unit 30 can be installed so as to be inconspicuous. Further, by making the outer shell 37 not a spherical shape but a hemispherical shape, a more compact thermal environment detecting unit 30 can be realized.

An experiment was conducted on the relationship between the color of the outer shell 37 and the sensitivity of the radiation sensor 38. This will be described below. In this experiment, a radiation sensor having a light receiving part (glass epoxy) with a diameter of 10 [mm] was used as the sensor structure, and a thermistor (epoxy coated Matsuba) was bonded to the light receiving part, and the emissivity was measured on the surface. To reduce the size, an aluminum foil was adhered, the sensitivity at that time was measured, and the value was used as a reference.

In the sensitivity measurement, a black body furnace for measuring the sensitivity of the radiation sensor is used to measure the wall temperature (black body surface),
When the room temperature (thermistor temperature for room temperature measurement) and the radiation temperature (thermistor temperature for radiation detection) are TW, TR, and Tg, respectively, the sensitivity R at that time is represented by R = (TR−Tg) / (TR)
−TW) × 100 (%).

In the sensitivity comparison, since there is a slight variation in the measurement sample, the standard sensitivity was measured, and then four kinds of colors (matte black, ivory, transparent paint (= acryl), and gray) were applied. , And the sensitivity was measured, and the ratio was compared. The result is shown in FIG. The parentheses in the figure indicate the sensitivity ratio of each color.

FIG. 5 is a graph showing the sensitivity ratio of each color in FIG. As is clear from FIG. 5, the sensitivity ratio is black, ivory, transparent, and gray in descending order of the sensitivity ratio. It was found that the transparency was almost the same in sensitivity to infrared as black.

Thus, according to this experiment, the surface color of the outer shell 37 is not limited to black as in a conventional globe ball, but may be selected according to the environment in which the thermal environment detecting unit 30 is installed. It was found that the radiation heat detection accuracy could be maintained.

Next, an experiment was conducted on the relationship between the wind direction and the output detected by the airflow sensor 34, and this will be described. In this experiment, the outputs of the airflow sensors 34 when the airflows at the same speed were applied from four directions as shown in FIG. 6A were compared (FIG. 6B). As can be seen from FIG. 6 (B), the detection output changes depending on the wind direction even with the airflow having the same speed. This is due to the influence of the second base 32 and the temperature compensation airflow sensor 33.

As described above, in the thermal environment detection unit 30, the detection of the airflow velocity by the airflow sensor 34 is influenced by the wind direction. However, in an ordinary room, for example, the installation position of the air conditioner is fixed, and the detection result is accordingly. Since it can be seen as a relative value, especially PMV indoors
There is no obstacle to finding the value.

Considering the positive use of the influence of the wind direction, the airflow sensor is connected to the second base 3.
By arranging a plurality of them around 2, it is also possible to obtain the wind direction from their detection outputs.

FIG. 7 shows a PMV value obtained by using the thermal environment detecting unit 30 of the embodiment (curve L1 in FIG. 7).
And a PMV value (curve L2 in the figure) obtained by the conventional standard thermal environment detecting device 1 as shown in FIG. It can also be seen from this figure that a good PMV value can be obtained using the thermal environment detection device 30.

In the above embodiment, the case where the outer shell 37 of the radiation sensor section 36 is hemispherical has been described. However, the present invention is not limited to this. The radiation temperature can be detected with a sensitivity of.

[0059]

As described above, according to the present invention, there are provided a temperature sensor, an airflow sensor, a humidity sensor, and a radiant heat sensor,
In a thermal environment detection device that detects a PMV value, which is an index of the thermal environment, based on the detection results obtained from these sensors, the sensors are arranged in the same unit, and the sensors are arranged in positions that do not interfere with each other. By doing so, the installation location is not limited and the high precision P
A thermal environment detecting device that can obtain an MV value can be realized.

[Brief description of the drawings]

FIG. 1 is a side view and a plan view showing a configuration of a thermal environment detection unit according to an embodiment.

FIG. 2 is a sectional view showing the section.

FIG. 3 is a block diagram illustrating a configuration of a thermal environment detection device.

FIG. 4 is a table showing the sensitivity ratio of the radiation sensor when the color of the outer shell of the radiation sensor unit is changed by an experiment.

FIG. 5 is a graph of the sensitivity ratio.

FIG. 6 is a graph showing a detection output of an airflow sensor when a wind direction is changed by an experiment.

FIG. 7 shows a PMV value obtained by using the thermal environment detection unit of the embodiment and a PM obtained by a conventional thermal environment detection device.
It is a graph shown with a V value.

FIG. 8 is an external configuration diagram showing a conventional thermal environment detection device.

FIG. 9 is an external configuration diagram showing a conventional small thermal environment detection unit.

FIG. 10 is a circuit diagram showing the circuit configuration of FIG. 9;

[Description of Signs] 30 Thermal Environment Detection Unit 31 First Base 32 Second Base 34 Airflow Sensor 35 Temperature Sensor 36 Radiation Sensor 37 Outer Shell 38 Radiation Sensor 39 Humidity Sensor

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI G01N 27/00 G01N 27/00 A G01W 1/02 G01W 1/02 B

Claims (8)

[Claims] 1. A thermal environment detection device comprising a temperature sensor, an airflow sensor, a humidity sensor, and a radiant heat sensor, and detecting a PMV value that is an index of a thermal environment based on detection results obtained from each of the sensors. A thermal environment detecting device, wherein each sensor is arranged in the same unit, and each sensor is arranged at a position where they do not interfere with each other. 2. The unit has a multi-stage configuration, wherein the temperature sensor and the airflow sensor are arranged on the same step and at positions away from each other by heat generated from the airflow sensor so as not to adversely affect the temperature sensor; The humidity sensor is disposed at a step different from the step where the temperature sensor and the airflow sensor are disposed, and the radiant heat sensor is disposed at the step where the temperature sensor and the airflow sensor are disposed and the humidity sensor is disposed. The thermal environment detecting device according to claim 1, wherein the thermal environment detecting device is arranged on a step different from the step. 3. A step in which the temperature sensor and the airflow sensor are arranged, a step in which the humidity sensor is arranged,
3. A step portion on which the radiant heat sensor is disposed is insulated by a heat insulating member.
2. The thermal environment detection device according to 1. 4. The first unit having a cylindrical outer shape.
And the outer shape is a columnar shape whose radius is smaller than the radius of the first base portion, and the first base portion is positioned so that its center position coincides with the center position of the first base portion. A second base portion formed on an upper surface of the base portion, wherein the temperature sensor and the airflow sensor are configured to generate heat from the airflow sensor on the upper surface of the first base portion. The humidity sensor is disposed in a hollow portion formed in the first base portion, and the radiant heat sensor is disposed on an upper surface of the second base portion. The thermal environment detecting device according to claim 1, wherein the thermal environment detecting device is disposed. 5. The thermal environment detecting device according to claim 4, wherein the second base portion is formed of a heat insulating member. 6. The temperature sensor and the airflow sensor,
The half of the first base on which the humidity sensor is arranged is arranged on the upper surface of the other half of the first base. Item 6. The thermal environment detection device according to Item 5. 7. The thermal environment detecting device according to claim 4, wherein a plurality of airflow sensors are provided on an upper surface of the first base portion. 8. The hull covering the radiant heat sensor is colored in a color suitable for the environment in which the unit is mounted. 5. The thermal environment detection device according to claim 6 or claim 7.