JPH051842A - Thermal sense arithmetic device - Google Patents

Abstract

PURPOSE:To simplify the constitution of a thermal sense arithmetic device that performs arithmetic on the thermal sense of a human body, make the device smaller, lighter and cheaper, and improve the responsiveness to the atmosphere in a room. CONSTITUTION:A specified temperature Ta* is calculated by a specified temperature arithmetic device 3-1 according to the ambient temperature Ta given by a temperature sensor Tsrf. A thermal energy H(Ta*) is calculated by a thermal energy arithmetic device according to the specified temperature Ta* without receiving feedback of the sensor temperature Tsrf, and given to a heating device. A thermal sense is calculated by a thermal sense arithmetic device according to the ambient temperature Ta, specified temperature Ta* sensor temperature Tsrf, thermal energy H(Ta*) and given by an air flow speed sensor. Therefore, an open loop function, that makes the sensor temperature Tsrf coincide with the specified temperature Ta*, is not needed to provide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal sensation computing device for computing a thermal sensation felt by a human body (for example, indoor thermal environment evaluation index T _AVR ).

[0002]

2. Description of the Related Art There is an indoor thermal environment evaluation index T _AVR (hereinafter simply referred to as an evaluation index) as an evaluation index of a thermal environment felt by a human body, that is, a thermal sensation. This evaluation index T _AVR is defined by the following equation (1). According to the evaluation index T _AVR , the temperature Ta, the radiation temperature Tr, and the airflow velocity V _air can be combined into one, and a comprehensive evaluation of the environment can be performed. In the formula (1) below, α, β, γ,
T _skin is a predetermined coefficient. T _AVR = α ・ Tr + β ・ T
a-γ ・ V _air ^0.5・ (T _skin −Ta) (1)
That, based on the above equation (1), the indoor air temperature Ta, the radiant temperature Tr, by measuring the indoor air velocity V _air at individual sensors, determining the evaluation index T _AVR Nio Isuzu equal rating index T _AVR ^* You can

Recently, as a second method for obtaining the above-mentioned evaluation index T _AVR , a heater is incorporated in the module main body to form an environment measuring section, and the surface temperature (sensor temperature) T _srf of the module main body is based on the temperature Ta. There has been proposed a method of controlling the amount of electric power supplied to the heater so as to match the specific temperature Ta ^* defined by the above (for example, Japanese Patent Application No. 2-250009 by the present applicant). According to this method, the amount of electric power supplied to the heater is set to the thermal energy H (T
The evaluation index T _AVR ^* can be obtained by measuring as a ^* ) and performing the calculation according to the following equation (2). In the equation (2) below, a, b, c and d are predetermined coefficients. T _AVR ^* = a ^* Ta ^* + b ^* H (Ta ^* ) + c ^* Ta + d (2)

[0004]

However, in the above-mentioned second method, a closed loop control function for feedback controlling the sensor temperature T _srf is added as a control function for matching the sensor temperature T _srf with the specific temperature Ta ^* . However, this complicates the device configuration and inevitably raises the price. In addition, the closed loop control is performed by, for example, PID.
When using a controller, the characteristics of PID or PI control have a great influence on the measurement performance of the evaluation index T _AVR ^* . Specifically, the thermal energy H (Ta
^* ) Is not the controlled variable (PV value) but the manipulated variable (MV value), and the measured evaluation index T _AVR ^* is always staggering and unusable, so the gain in the PID controller should be low. Or requires smoothing of the data. However, due to this gain reduction and smoothing, the response characteristic to the indoor environment is greatly deteriorated.

[0005]

The present invention has been made to solve the above problems, and the first invention (the invention according to claim 1) of the invention is the temperature Ta provided through a temperature sensor. calculating a certain temperature Ta ^* based on the specific temperature calculating means, the particular temperature Ta ^* sensor temperature based on the T _sr thermal energy without undergoing feedback _f H (Ta ^*) to calculate the thermal energy H (Ta that this operation ^* ) To the heating means for supplying heat energy, temperature Ta, specific temperature Ta ^* , sensor temperature T _srf , heat energy H (Ta ^* )
And a thermal sensation calculation means for calculating a thermal sensation based on the air velocity V _air supplied via the air flow sensor. The second invention (the invention according to claim 2) is the same as the first invention, except that the room temperature Ta and the specific temperature T are
Based on a ^* , sensor temperature T _srf , thermal energy H (Ta ^* ), indoor air velocity V _air , and coefficients α, β, a ₁ and a ₂ , the indoor thermal environment evaluation index T _AVR ^* is expressed as a thermal sensation below ( The calculation is performed by the expression a). _{^{T AVR * = α · T srf}} + β · Ta-a 1 · H (Ta *) + a 2 · V air n (T srf -Ta *) ··· (a)

[0006]

Therefore, according to the present invention, the sensor temperature T
A closed loop control function for matching _srf with the specific temperature Ta ^* is not required.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The thermal sensation computing device according to the present invention will be described in detail below.

FIG. 2 is a block diagram showing an embodiment of the thermal sensation arithmetic unit. This thermal sensation computing device 1
Includes an input unit 2, a calculation unit 3, and a display output unit 4.
The input unit 2 includes an indoor temperature Ta through the temperature sensor 6, a sensor temperature T _srf from the environment measuring unit 5, and an airflow sensor 7.
The indoor air velocity V _air through V is given as a detected value. Then, these detected values are sent from the input unit 2 to the calculation unit 3, and in the calculation unit 3, the specific temperature Ta ^* , the heater power H (Ta ^* ) as the heat energy, and the evaluation index T _AVR ^*.
Is required.

That is, in the calculation unit 3, as shown in FIG. 1, the specific temperature calculation unit 3-1 calculates the specific temperature Ta ^* by the following equation (3) based on the room temperature Ta. The formula (3) below will be described later. Ta ^* ≈ (γ · Hr / α · A) · (T _skin −Ta) + Ta (3)

[0010] Next, in Hitabawa calculation unit 3-2, based on the particular temperature Ta ^*, without receiving feedback sensor temperature T _srf, by the following equation (4), calculates the Hitabawa H (Ta ^*). H (Ta ^* ) = Hr · (Ta ^* −Ta) + A · (0.2) ⁿ · (Ta ^* −Ta) (4)

Then, the obtained heater power H (Ta
^* ) Is given to the environment measuring unit 5 via the input unit 2.

Here, the environment measuring unit 5 will be described. For example, as shown in FIG. 3A, the environment measuring unit 5 includes an ellipsoidal-shaped module body 5-11 and a heater 5-5 disposed inside the module body 5-11.
12 and a surface temperature sensor 5-13 attached to the module body 5-11. The module main body 5-11 is made of a metal having a good thermal conductivity such as copper or aluminum, and the outer surface thereof is colored as shown by a meshed portion in FIG. It is supposed to be. In this embodiment, the temperature sensor 6 and the airflow sensor 7 are installed on the support pedestal 5-14 of the module body 5-11. Module body 5-11
May have a cylindrical shape or the like, as shown in FIGS. 3 (b) and 4 (b).

The above-mentioned heater power H (Ta ^* ) is given to the heater 5-12 in the environment measuring section 5.
Then, the module main body 5-11 is heated by the heater 5-12, and the sensor temperature T _srf detected by the surface temperature sensor 5-13 is sent to the calculation unit 3 via the input unit 2.

In the calculation unit 3, the sensor temperature T _srf is given to the evaluation index calculation unit 3-3. Evaluation index calculator 3-3
To the room temperature Ta via the temperature sensor 6, the air velocity V _air via the air flow sensor 7, the specific temperature Ta ^* via the specific temperature calculation unit 3-1, the heater power H (Ta ^* ) via the heater power calculation unit 3-2. Is provided, and based on these provided values, the evaluation index T _AVR ^{* is} _calculated by the following equation (5) ^.
To calculate. The following equation (5) will be described later. ^{_{T AVR * = α · T srf}} + β · Ta-a 1 · H (Ta *) + a 2 · V air n (T srf -Ta *) ··· (5)

Evaluation index T obtained by the evaluation index calculation unit 3-3
_{The AVR} ^* is sent to the display output unit 4 and displayed.

[0016] Thus, according to the thermal sensation computing device 1 according to this embodiment obtains a certain temperature Ta ^* based on the room air temperature Ta to be granted through the temperature sensor 6, the sensor temperature based on the particular temperature Ta ^* The heater power H (Ta ^* ) is calculated without receiving the feedback of T _srf , and the calculated heater power H (Ta ^* ) is used for the heater 5-12.
Since the indoor air temperature Ta, the specific temperature Ta ^* , the sensor temperature T _srf , the heater power H (Ta ^* ) and the indoor air velocity V _air are calculated, the evaluation index T _AVR ^* is calculated. A closed-loop control function for matching _srf and the specific temperature Ta ^* is not required, the device configuration is simplified, and the size, weight, and cost can be promoted. In addition, the heater power H is set regardless of the sensor temperature T _srf.
Since only (Ta ^* ) is supplied as a constant, that is, the specific temperature Ta ^* is obtained and the heater power H (T
Since only a ^* ) is provided, the influence of the control characteristics is eliminated, and the responsiveness to the indoor environment is improved. In addition, according to the present embodiment, the overshoot is completely eliminated, and the environment measuring unit 5 can always be safely touched.

Next, the specific temperature Ta ^* and the heater power H
(Ta ^* ) will be described.

[0018] calculate the specific temperature Ta ^* from the indoor air temperature Ta, with this, when a breeze V _AIR0 there is air velocity V _air, H (Ta ^*) as a thermal equilibrium equation satisfied by the environment measuring unit 5 = Hr · (Ta ^* −Ta) + A · V _air0 ⁿ · (Ta ^* −Ta) (6) The relational expression is defined (at this time, Ta ^* = T).
_srf ). Hr: radiant heat transfer coefficient, A: constant specific to the environment measurement unit. This H (Ta ^* ) is actually given to the heater 5-12, and at this time, the module body 5-11
The surface temperature of T is measured as T _srf . Now, the specific temperature Ta ^*
When the evaluation index T _AVR is defined as the equation (1), V _air is regarded as a slight wind velocity V _air0, and α · (A / Hr) · V _air0 ⁿ · (Ta ^* −Ta) = γ · V _air0 ^0.5・ (T _skin − Ta) ・ ・ ・_Set to satisfy (7). That is, Ta ^* = (γ · Hr / α · A) · (V _air0 ^0.5 / V _air0 ⁿ ) · (T _skin −Ta) + Ta ≈ (γ · Hr / α · A) · (T _skin −Ta) + Ta (8), Ta ^* is determined by the room temperature Ta.

Next, the formula for calculating the evaluation index T _AVR ^* will be described.

Although the evaluation index is defined as T _AVR , this can be regarded as a room evaluation temperature in which the _air temperature Ta, the radiation temperature Tr, and the air velocity V _air are combined. The environment measuring section 5, but donates heater power H (Ta ^*) determined by Ta ^*, the surface temperature T _srf is _{^{Ta * ≠ T srf, H (}} Ta *) = Hr · (T srf ^{_{-Tr) + a · V air n}} · (T srf -Ta) has become a ... (9). Therefore, this H (Ta ^* ), Ta, Ta ^*
And from the ^{_{V air, T AVR * = α}} · T srf + β · Ta- (α / Hr) · H (Ta *) + (α / Hr) · A · V air n (T srf -Ta *) ··· (10), where (α / Hr) is a ₁ ,
If (α / Hr) · A is a ₂ , the above-mentioned equation (5) can be derived.

[0021]

As is apparent from the above description, according to the present invention, since the closed loop control function for matching the sensor temperature T _srf and the specific temperature Ta ^* is not required, the device structure is simplified, It is possible to promote small size, light weight, and low price. Further, since the heater power H (Ta ^* ) is uniquely supplied by obtaining the specific temperature Ta ^* , the influence of the control characteristics can be eliminated, and the responsiveness to the indoor environment can be improved.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing a calculation unit in the thermal sensation calculation device shown in FIG.

FIG. 2 is a block configuration diagram showing an embodiment of a thermal sensation calculation device according to the present invention.

FIG. 3 is a schematic vertical cross-sectional view showing an example of an environment measuring unit using an elliptic spherical shape and a cylindrical module main body.

FIG. 4 is an external perspective view of an environment measuring unit using an ellipsoidal and cylindrical module body.

[Explanation of symbols]

1 Thermal sensation calculator 3 operation part 3-1 Specific temperature calculator 3-2 Heater power calculator 3-3 Evaluation index calculator 5 Environmental measurement department 5-11 Module body 5-12 Heater 5-13 Surface temperature sensor 6 Temperature sensor 7 Air flow sensor

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[Procedure amendment]

[Submission date] August 20, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

FIG. 2 is a block diagram showing an embodiment of the thermal sensation calculation device. This thermal sensation computing device 1
Includes an input unit 2, a calculation unit 3, and a display output unit 4.
The input unit 2 includes an indoor air temperature Ta through the temperature sensor 6, a sensor temperature T _{srf from} the environment measuring unit 5, and an airflow sensor 7.
The indoor airflow velocity V _air through is given as a detection value. Then, these detected values are sent from the input unit 2 to the calculation unit 3, and the calculation unit 3 calculates the specific temperature Ta ^* , the heater power H (Ta ^* ) as heat energy, and the evaluation index T.
_AVR ^* is required.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

Next, in the heater power calculation unit 3-2,
Based on the specific temperature Ta ^* , the heater power H (Ta ^* ) is calculated by the following equation (4) without receiving the feedback of the sensor temperature _Tsrf . H (Ta ^* ) = Hr · (Ta ^* −Ta) + A · (0.2) ⁿ · (Ta ^* −Ta) (4)

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

Then, the obtained heater power H (T
a ^* ) is given to the environment measuring unit 5 via the input unit 2.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

The heater power H (Ta ^* ) described above is
It is given to the heater 5-12 in the environment measuring unit 5. Then, the heater 5-12 heats the module main body 5-11, and the sensor degree T _srf detected by the surface temperature sensor 5-13 is sent to the arithmetic unit 3 via the input unit 2.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

In the calculation unit 3, the sensor temperature T _srf is given to the evaluation index calculation unit 3-3. Evaluation index calculator 3
-3, the room temperature Ta through the temperature sensor 6, the air flow velocity V _air through the air flow sensor 7 _{, the} specific temperature calculation unit 3-
Specific temperature Ta ^* through 1, heater power calculation unit 3-2
Heater power H (Ta ^* ) is supplied via
Based on these donated values, the evaluation index T _AVR ^* is calculated by the following equation (5). The following equation (5) will be described later. ^{_{T AVR * = α · T srf}} + β · Ta-a 1 · H (Ta *) + a 2 · V air n (T srf -Ta *) ··· (5)

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

From the room temperature Ta to the specific temperature Ta^*Calculate
Then, using this, the air velocity V_airThere is a breeze V
_airo, The thermal equilibrium equation that the environment measurement unit 5 satisfies
hand H (Ta^*) = Hr · (Ta^*-Ta) + A ・ V_airo ⁿ・ (Ta^*-Ta)                                                         ... (6) The relational expression is defined as (at this time, Ta^*= T
_srfWill be considered). Hr: Radiant heat transfer coefficient, A:
A constant unique to the environment measurement unit. This H (Ta^*) Actually heated
It is given to the heater 5-12. At this time, the module body 5-1
The surface temperature of 1 is T_srfIs measured. Well, specific temperature
Ta^*Is the evaluation index T_AVRIs defined as the above formula (1)
When you do, V_airIs a slight wind speed V_airoAssuming that   α ・ (A / Hr) ・ V_airo ⁿ・ (Ta^*−Ta) = γ · V_airo ^0.5 ・ (T_skin-Ta)     ... (7) To satisfy Ta^*= (Γ · Hr / α · A) · (V_airo ^0.5/ V_airo ⁿ) ・ (T^{s kin} −Ta) + Ta≈ (γ · Hr / α · A) · (T_skin-Ta) + Ta       ... (8) As Ta^*Is determined by the room temperature Ta. However, n
Is in the range of 0.4 to 0.7.

Claims (2)

[Claims] 1. A thermal sensation arithmetic unit provided to an environment measuring unit having a heating means capable of changing a sensor temperature T _srf , wherein an air temperature Ta supplied via a temperature sensor.
Certain temperature Ta ^* and specific temperature calculating means for calculating a, the specific temperature Ta ^* to based the sensor temperature T _srf thermal energy without receiving feedback H (T based on
a ^* ) and calculates the calculated thermal energy H (Ta ^* ) to the heating means; the temperature Ta, the specific temperature Ta ^* , the sensor temperature T _srf , and the thermal energy. A thermal sensation calculation device comprising: thermal sensation calculation means for calculating a thermal sensation based on H (Ta ^* ) and an air velocity V _air supplied via an air flow sensor. 2. The thermal sensation calculation means according to claim 1, wherein the temperature Ta, the specific temperature Ta ^* , the sensor temperature T _srf , the thermal energy H (Ta ^* ), the air velocity V _air , the coefficients α, β,
A thermal sensation calculation device characterized in that the indoor thermal environment evaluation index T _AVR ^* is calculated as a thermal sensation based on a ₁ and a ₂ by the following equation (a). ^{_{T AVR * = α · T srf}} + β · Ta-a 1 · H (Ta *) + a 2 · V air n (T srf -Ta *) ··· (a)