JPH07113542A - Controlling method for air conditioner - Google Patents

Abstract

PURPOSE:To form a comfortable indoor environment by altering air conditioning control temperature, atmospheric air intake amount and flow rate of an air conditioner according to a human congestion degree. CONSTITUTION:When number of persons in a room is small, a control temperature of an air conditioner 10 is set higher than a reference temperature, an atmospheric air intake damper 11 is throttled, and number of revolutions of a blower 17 is reduced to decrease an air flow rate. When the number of the persons in the room is intermediate, the temperature of the conditioner 10 is set to the reference temperature, the damper 11 is opened, the number of revolutions of the blower 17 is raised as compared with that when the number is small to increase the flow rate. When the number is many, the temperature of the conditioner 10 is set lower than the reference temperature, the damper 11 is opened as compared with that in the case of the intermediate number, and the number of revolutions of the blower 17 is increased as compared with that when the number is intermediate to increase the flow rate. Thus, the air conditioning in the room can be controlled in real time to form a comfortable indoor environment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner control method for realizing energy saving while satisfying a comfortable air conditioning environment in a building or a department store.

[0002]

2. Description of the Related Art Air conditioners such as buildings and department stores are equipped with the functions of cooling, heating and ventilation, and are used to create a comfortable indoor environment or to control the temperature, humidity and cleanliness necessary for the production process and storage of goods. It is essential to maintain a good indoor environment. Except for production energy, most of the building energy consumption is used for building equipment, and among building equipment, air conditioning equipment uses the most energy. Usually, the ratio of electric power energy to the total energy of a building is 80% or more, of which the air conditioning power reaches 40% or more of the total power. Therefore, it is most effective to reduce the electric power required for the air conditioning equipment when considering the energy saving of the building.

Next, a configuration and control example of a conventional air conditioner will be described with reference to FIG. In FIG. 3, reference numeral 10 denotes an air conditioner (air conditioner), which includes a damper 11 for adjusting the amount of intake of outside air, a preheater 12 for preheating air, a filter 13 for filtering air, a cooler 14 for dehumidifying and cooling air, and a humidifier. Humidifier 1 for
5, a heater 16 for heating air, and a blower 17 are provided.

An air supply duct 18 sends air from the air conditioner 10 to the room 20, and the air in the room is sent to the air conditioner again via the air duct 19. This air flow is such that the outside air 1 passes through the damper 11 (air 2), mixes with the ambient air 8 in the summer, becomes 3 through the filter 13, becomes 4 after being cooled by the cooler 14, and is sent by the blower 17. It becomes 7 and blows out into the room 20. In the winter, the outside air 1 is preheated by the preheater 12 so that it can be sufficiently humidified. Then, it is mixed with the atmosphere 8 and filtered to become 3, then reaches 5 through the humidifier 15, is heated up to 6 by the heater 16, and is blown out into the room.

A temperature sensor 21 and a humidity sensor 22 are installed in the room 20. The indoor temperature is detected by a temperature sensor 21 as a temperature output 21 ', and the indoor humidity is detected by a humidity sensor 22 as a humidity output 22', which are input to a controller 23, respectively. The controller 23 outputs a cooling temperature signal 24 and a humidity signal 25 in the summer.
The cooling temperature signal 24 inputs cold water from the refrigerator 30 to a control valve 24 'provided in a cooling pipe 31 leading to the cooler 14 to control the amount of cold water and control the temperature. Humidity signal 2
Reference numeral 5 inputs hot water (or steam) from the boiler 40 to a control valve 25 'provided in a humidifying pipe 42 leading to the humidifier 15, and adjusts the amount of hot water (or steam) to control the humidity.
In winter, the heating temperature signal 26 and the humidity signal 25 are output. The heating temperature signal 26 inputs hot water (or steam) from the boiler 40 to a control valve 26 ′ provided in a heating pipe 43 that guides the heater 16, and adjusts the amount of hot water (or steam) to control the temperature. . The procedure for controlling the humidity by adjusting the amount of hot water (or steam) flowing into the humidifier 15 by the humidity signal 25 is the same as that in the summer. In addition, hot water (or steam) directly flows from the boiler 40 into the preheater 12 that preheats the outside air 1 through the preheating pipe 41.

In this way, the temperature and humidity of the room 20 are
Cold water from the refrigerator 30 or hot water (or steam) from the boiler 40 is detected by the temperature sensor 21 and the humidity sensor 22 so that the respective values become the values set by the controller 23.
The temperature of the air supply 7 can be changed by adjusting the amount of.

[0007]

[Problems to be Solved by the Invention] The above-described configuration and control example of the air conditioner is a system (constant air volume system) in which the amount of blast air is constant and the blast temperature is changed. The same can be said for the variable air volume method that changes the air flow rate, but the conventional air conditioner control method is a method that changes the air temperature or the air flow rate according to the measured values of the indoor temperature sensor and humidity sensor. The effect of the degree of congestion on the indoor temperature had a very long time lag that it appeared over a long period of time. Therefore, in a room or the like where the number of personnel varies greatly, there is a tendency for overcooling or overheating, which may waste power.

That is, the amount of heat generated by the human body is 10 per adult.
The amount of heat is 0 W to 200 W, and this amount of heat becomes radiant heat and raises the room temperature, but due to the time lag at this time, not only does the air conditioning become overcooled or overheated, but in some cases it becomes undercooling or underheating, and there are people in the room. There was a problem of giving offense to.

The present invention has been made in order to solve the above-mentioned problems, and the blast temperature and the blast amount and the outside air intake amount are changed in real time according to the number of people (crowding degree) in the room, and the fluctuation of the person is severe. Even in places, it aims to create an environment that does not cause discomfort to people and to achieve energy savings.

[0010]

[Means for Solving Problems] An air conditioner control method for solving the above problems detects the number of people in a room, and sets the air conditioning control temperature higher than a reference temperature when the number of people is less than a predetermined number. In addition, the outside air intake damper of the air conditioner is adjusted in the closing direction to reduce the amount of outside air intake, and the blower that adjusts the air flow rate of the air conditioner is controlled to a low speed operation state (state 1). When the number of passengers is within the predetermined number, the air conditioning control temperature is set to the reference temperature, and the outside air intake damper and the blower of the air conditioner are operated in the opening direction and at medium speeds faster than those in the state 1 above. When the number of people in the room is equal to or more than a predetermined number, the air conditioning control temperature is set lower than the reference temperature, and the outside air intake damper and the blower of the air conditioner are set to be lower than those in the above state 2. Open each In this case, the control is performed in the direct and fast high-speed driving state (state 3).

[0011]

In the air conditioner control method according to the present invention, the air conditioning control temperature and the outside air intake amount and the air blowing amount of the air conditioner are changed according to the degree of congestion of people in the room. It is possible to control, and it is possible to prevent the air conditioning from being overcooled or undercooled or overheated or underheated, and energy saving can be realized without causing discomfort to a person.

[0012]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram showing the configuration of the air conditioner of the present invention.

In the reference numerals of FIG. 1, the same parts as those of FIG. Here, 27 is a number-of-people detecting device installed in the room 20, and examples of this number-of-people detecting device include, for example, JP-A-5-46732 and JP-A-5-174210.
Are known. The number output 27 ′ obtained by the number detection device 27 is input to the controller 23. The controller 23 outputs a blower control signal 28 for controlling the rotation speed of the blower 17 and a damper control signal 29 for controlling the opening degree of the damper 11 according to the magnitude of the number of people output 27 '. Fig. 2 shows the control of the blower, damper, and temperature at this time.
Explained by.

FIG. 2 is an explanatory diagram showing a method of controlling the air conditioner. In FIG. 2, the horizontal axis represents the number of people and the vertical axis represents the temperature. A small number of people means, for example, that the number of people per unit area is 1 person / m or less, a medium number of people is 1.1 to 2.9 people / m 2, and a large number of people is 3
You can think of it as more than person / m.

Now, if the number of people in the room is small, control of state 1 is performed. That is, the control temperature of the air conditioner is set higher than the reference temperature, and the outside air intake damper 1 of the air conditioner in FIG.
1, the rotation speed of the blower 17 is further reduced to reduce the amount of blown air. This is intended to be controlled in consideration of the amount of heat generated by humans. At that time, it reaches 25 to 30% during cooling and 40 to 50% during heating, and reducing the outside air intake amount greatly contributes to energy saving. In this state 1, since the number of people in the room is small, even if the intake air is throttled, the cleanliness of the air is maintained without significantly increasing the carbon dioxide concentration in the room. This carbon dioxide concentration is 1000 pp for an air-conditioned building of a certain scale or more according to the Building Standards Law and Building Management Law.
Although the maximum carbon dioxide concentration in a building is designed for the maximum number of people to enter the building, the carbon dioxide concentration is generally about 600 when the number of people in the room is small.
It is below ppm.

Next, if the number of people in the room is medium, the control in state 2 is performed. That is, the control temperature of the air conditioner is set to a reference temperature (this reference temperature is, for example, 26 ° C. during cooling and 22 ° C. during heating), and the outside air intake damper 11 of the air conditioner in FIG. The state is opened more than in the state 1, and the number of rotations of the blower 17 is increased more than in the case of a small number.

In addition, the state 3 is controlled by a large number of people in the room. That is, the control temperature of the air conditioner is set lower than the reference temperature (for example, if the temperature is lower than the reference temperature by about 10%, the control temperature becomes 24 ° C during cooling and 20 ° C during heating). The outside air intake damper 11 is opened more than in the state 2 to increase the intake amount of the outside air, and further, the rotation number of the blower 17 is increased to increase the amount of the blown air compared to the case of the number of people. It suppresses the increase in carbon dioxide concentration, which sometimes increases, and keeps the indoor air clean and maintains a comfortable environment.

[0018]

As described above, according to the present invention, the air-conditioning control temperature and the outside air intake amount and the blown air amount of the air conditioner are changed according to the crowded state of the person. Since it can be controlled in real time, it has the effect of saving energy and creating a comfortable indoor environment.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an air conditioner according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a method of controlling an air conditioner.

FIG. 3 is a block diagram showing a configuration and a control example of a conventional air conditioner.

[Explanation of symbols]

 10 Air Conditioner 11 Damper 12 Preheater 13 Filter 14 Cooler 15 Humidifier 16 Heater 17 Blower 18 Air Supply Duct 19 Air Circulation Duct 20 Indoor 21 Temperature Sensor 22 Humidity Sensor 23 Controller 24 Cooling Temperature Signal 25 Humidity Signal 26 Heating Temperature signal 27 Number of people detection device 28 Blower control signal 29 Damper control signal 30 Refrigerator 31 Cooling pipe 40 Boiler 41 Preheating pipe 42 Humidification pipe 43 Heating pipe

Claims (1)

[Claims] 1. An air conditioner that detects temperature and humidity in a room and performs cooling and heating, detects the number of people in the room,
When the number of people is less than or equal to a predetermined number, the control temperature of the air conditioner is set higher than the reference temperature, and the outside air intake damper of the air conditioner is adjusted in the closing direction to reduce the outside air intake amount, and The blower that adjusts the air flow rate of the air conditioner is controlled to a low-speed operation state (state 1), and when the number of people is within a predetermined number, the control temperature of the air conditioner is set to the reference temperature and the outside air is removed. The input damper and the blower are controlled to the open direction and the medium speed operation state which are respectively faster than in the state 1 (state 2), and when the number of persons is equal to or more than a predetermined number, the control temperature of the air conditioner is higher than the reference temperature. A method for controlling an air conditioner, characterized in that the air intake damper and the blower are set to a low speed while being controlled to an opening direction and a high speed operation state (state 3) faster than in the state 2 respectively.