JPH0674526A - Air-conditioning control system - Google Patents

Abstract

PURPOSE:To carry out a comfortable air-conditioning and save the energy by adding the active mass of persons to the air-conditioning based on a thermal heat environment index. CONSTITUTION:An air-conditioning control system comprises an air-conditioner 5 for blowing conditioned air through a plurality of blow-off ports 3, dampers 4 disposed at the blow-off ports 3, an image pick-up device 6 provided on the ceiling of a room 1, an image processor 8 for converting image data photographed by the image pick-up device into the value of the active mass of persons, and an air-conditioning controller 9 for controlling the air conditioner 5 and the dampers 4 based on the value of the active mass of the persons, temperature, humidity, wind velocity and radiation temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning control system for performing comfortable air conditioning based on a heat balance equation in which the amount of human activity is taken into consideration.

[0002]

2. Description of the Related Art The heat and heat conditions surrounding human beings pose a problem of mutual relation as a human-environmental system, and are roughly classified into environmental side elements and human body side elements. In terms of environmental factors, temperature is the first major factor and directs the in-situ thermal environment, to which the factors of humidity, wind speed and radiation are added. The major factors on the human body side are human activity and clothing conditions. The amount of activity is expressed as the amount of energy metabolism, and the amount of heat produced is significantly different between resting and exercising, and the amount of heat released is different between naked and dressed, and the relationship between humans and the environment is different.

The evaluation of the thermal environment as a human-environmental system consists of a combination of environmental factors, and also a thermal response and a feeling of comfort for the human body, and the human body such as the amount of activity and the amount of clothing. Various thermal indicators such as those that add elements on the side have been proposed. These are roughly divided into indicators based on physical measurement and indicators based on the reaction on the human body side. Among them, PMV (pred
icted mean vote) and new effective temperature
rature; ET *) is proposed.

The PMV includes temperature, humidity, air flow, radiation,
ET * is a combination of environmental factors that bring about thermal equilibrium with variables such as the amount of activity and the amount of clothing, and ET * is based on a thermal equilibrium model that includes a body temperature regulation function by sweating, and temperature, humidity, airflow, radiation, activity, and amount of clothing It is a comprehensive evaluation of skin temperature, body temperature, perspiration, heat storage, etc. based on such environmental variables.

[0005]

[Problems to be Solved by the Invention] The thermal environment index based on the heat balance equation such as PMV or ET * is originally
It is determined based on humidity, wind speed, radiant temperature, amount of human activity, amount of clothing, etc., and these indexes are used as guidelines for performing air conditioning control. However, taking air conditioning control using PMV as an example, at present, only four items of temperature, humidity, wind speed, and radiant temperature are treated as variables, and the amount of human activity and the amount of clothing are set assuming the nature of the room. Since the value is used for control, there is a problem that it may not be said that the environment is comfortable as a result of the air conditioning control being performed in the same condition regardless of whether a person is sitting or walking. is doing. For example, if you sit comfortably while you are walking, you may feel chilly, which increases energy consumption.

The present invention solves the above problem, and by adding the activity amount of a person to the conventional air conditioning control based on the thermal environment index, comfortable air conditioning can be achieved and energy saving can be achieved. It is intended to provide an air conditioning control system.

[0007]

To this end, the air conditioning control system of the present invention comprises an air conditioner 5 for blowing conditioned air through a plurality of air outlets 3, and a damper 4 arranged at the air outlet 3.
An image pickup device 6 arranged on the ceiling of the room 1, an image processing device 8 for converting image data taken by the image pickup device into a value of the amount of activity of a person, a value of the amount of activity of the person, temperature, and humidity. ,wind speed,
An air conditioning control device 9 for controlling the air conditioner 5 and the damper 4 based on the radiation temperature is provided. It should be noted that the numbers added to the above-mentioned configurations are for comparison with the drawings for easy understanding, and the configurations of the present invention are not limited by these.

[0008]

In the present invention, for example, as shown in FIG.
The image signal taken by the image pickup device 6 is converted into data of the amount of activity of a person in the image processing device 8, and the output signal thereof is sent to the air conditioning control device 9, and in the air conditioning control device 9,
Air-conditioning control is performed so that the PMV value is obtained based on the activity amount value, temperature, humidity, wind speed, and radiation temperature, and the PMV value is optimized. The PMV value is obtained by a thermal equilibrium equation in which temperature, humidity, wind speed, radiation temperature, and activity amount are variables, and specifically, (-3: cold), (-2: cool), -1 (slightly cool). ), (0: just right), (+1: slightly warm), (+2: warm), (+3: hot), and the air conditioning control is performed so that this becomes 0.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an air conditioning control system of the present invention.

A large number of air outlets 3 connected to the air conditioning duct 2 are arranged on the ceiling of the room 1. A damper 4 is provided at each of the outlets 3, and the air conditioning duct 2 is connected to the air conditioner 5. An image pickup device 6 is arranged at a substantially central portion of the ceiling of the room 1, and takes an image of a person 7 in the room 1. The image signal photographed by the image pickup device 6 is output to the image processing device 8
Is converted into human activity data, and the output signal is sent to the air conditioning control device 9. In the air conditioning control device 9, the PMV value is calculated based on the activity data and the temperature, humidity, wind speed and radiation temperature. The air flow rate of the air conditioner 5 and the openings of the dampers 4 are determined so as to obtain the optimum value, and a control signal is output to the air conditioner 5 and the dampers 4. Further, the activity amount image processed by the image processing device 8 is output to the display 10 as an observation image.

The PMV value is obtained by a thermal equilibrium equation in which temperature, humidity, wind speed, radiation temperature and activity amount are variables, and specifically, (-3: cold), (-2: cool), -1.
It is calculated as (slightly cool), (0: just good), (+1: slightly warm), (+2: warm), (+3: hot), and the air conditioning control is performed so that this becomes 0.

FIG. 2 is a diagram showing an embodiment of an analysis system for analyzing the amount of human activity in the image processing apparatus,
FIG. 3 is a diagram showing an example of an observed image, and FIG. 4 is a diagram for explaining the processing procedure.

In FIG. 2, the image memories 12 and 13 are
Video data (image data) is stored, and this image data is obtained by photographing the monitoring area from above using an image pickup device 6 such as a CCD camera or a video camera. The switching unit 11 switches so as to alternately store the input image data in the image memories 12 and 13 every predetermined time. The moving body extraction unit 4 uses the image memories 12, 13
The moving person is extracted by taking the difference between the images stored in the image memory 15, and the image memories 15 and 16 store the image data in which the moving object is extracted. The position extracting unit 17 extracts the position of the person at each time from the image data of the moving body in the image memories 15 and 16, and the analyzing unit 18 temporally extracts the position of the person as shown in FIG. From the change, the size of the change area, that is, the amount of human activity is obtained. If the person is walking or running, the change area in the image becomes large, and conversely, if the person sits still, the change area becomes small.

The above process will be described with reference to FIG.
The switching unit 11 displays the time from the imaging device 6 as time passes.
Images f1, f2, and f3 are captured in the order of (a), (b), and (c). The switching unit 11 switches the image data so that the first image f1 is stored in the image memory 12 and the next image f2 is stored in the image memory 13. Therefore,
The movement extraction unit 14 reads the image data stored in the image memories 12 and 13, respectively, calculates the difference between the images f1 and f2, and stores the image m12 in the image memory 15.
In the image m12 obtained as the difference between the images f1 and f2, only the changed portion as shown in FIG. 4D, that is, only the information of the moved person whose positions are not the same in the images f1 and f2 remains. Background portions such as stationary objects around the images f1 and f2 are at the same positions in the images f1 and f2 and have no change, and thus are deleted by taking the difference. in this case,
Even in the case of the information of the person who has moved, there is a case where a part of the overlapping portion in the images f1 and f2 is removed, but this can be supplemented by processing such as filling in and expansion. Further, when the third image f3 is captured, the switching unit 11 switches the image data so as to store the image f3 in the image memory 12 again. Then, in the same manner, the dynamic image extracting unit 14 reads the image data stored in the image memories 12 and 13, respectively, and obtains the difference between the images f2 and f3 to obtain the image m23 shown in FIG.
Store in 6.

FIG. 5 is a diagram for explaining another embodiment of the present invention. This embodiment is applied to a method of individually air-conditioning for each area.
At the same time as the amount of activity of the person, its distribution is analyzed, and the air conditioning of each area is controlled according to the distribution of the amount of activity. Alternatively,
By controlling the blowing direction of air conditioning, it is possible to comfortably perform air conditioning in each area.

In the above embodiment, the thermal environment index based on the thermal equilibrium equation based on the PMV value is used for control, but the thermal environment index based on the thermal equilibrium equation based on the ET * value may be used for control.

[0017]

As is apparent from the above description, according to the present invention, an air conditioner for blowing conditioned air through a plurality of air outlets, a damper arranged at the air outlets, and a ceiling portion of a room. And an image processing device for converting image data photographed by the imaging device into a value of the amount of activity of a person, based on the value of the amount of activity of the person, temperature, humidity, wind speed, and radiation temperature. In order to achieve comfortable air conditioning and energy saving by adding the amount of human activity to the conventional air conditioning control based on the thermal environment index, the air conditioning control device for controlling the air conditioner and the damper is provided. You can

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an air conditioning control system of the present invention.

[Figure 2] 1 of analysis system for analyzing the amount of human activity
Figure showing an example

FIG. 3 is a diagram showing an example of an observed image in FIG.

FIG. 4 is a diagram for explaining a processing procedure in FIG.

FIG. 5 is a diagram for explaining another embodiment of the air conditioning control system of the present invention.

[Explanation of symbols]

1 ... Room, 2 ... Air conditioning duct, 3 ... Blowout port, 4 ... Damper,
5 ... Air conditioner 6 ... Imaging device, 7 ... Human, 8 ... Image processing device, 9 ... Air conditioning control device

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yutaka Daimon 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Toyokatsu Sato 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Within the corporation

Claims (1)

[Claims] 1. An air conditioner that blows conditioned air through a plurality of air outlets, a damper disposed at the air outlets, an imaging device disposed on a ceiling of a room, and an image captured by the imaging device. Image processing apparatus for converting the image data of the person into an activity amount value of a person, and an air conditioning control apparatus for controlling the air conditioner and the damper based on the activity amount value of the person, temperature, humidity, wind speed, and radiation temperature. An air-conditioning control system comprising: