JPH05196280A - Duct type air conditioner - Google Patents

Abstract

PURPOSE:To enable a range of intake amount of surrounding air to be freely set and to control the most appropriate amount of air ventilation in response to air-tightness performance of a housing, the number of occupants and air conditioning load. CONSTITUTION:Duct type air conditioners are air ventilation blower devices 17 installed at a suction part 6a and a duct 6 between outer walls of the duct type air conditioners. They have an air ventilation amount measuring means 19 for measuring an actual air ventilation amount from a blower 18 of each of the air ventilation blowers 17 and varying state of each of indoor air temperatures of a plurality of conditioned rooms 1 is measured. They are further provided with a room temperature sensor acting as a thermal load measuring means 21, means 22 for determining a set amount of air determined by the thermal load measuring means 21, ventilation air volume determining means 25 determined by means 24 for determining a dilution rate of ventilation air volume and an air blowing adjusting means 20 for adjusting the ventilation air volume in response to opening or closing of a damper 20a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct type air conditioner, and in particular, by controlling the amount of outside air that can be ventilated by introducing outside air, it is suitable for various airtight performances of houses. The present invention relates to an air conditioner capable of ensuring ventilation.

[0002]

2. Description of the Related Art FIG. 4 is an overall configuration of an air-conditioning system relating to a conventional control device for an intake air amount disclosed in, for example, Japanese Patent Laid-Open No. 2-290454. FIG. 5 is a control block diagram thereof. In the figure, 1 is a room (room to be air-conditioned), 2 is a main duct, 3 is an outlet duct, 4 is an air volume adjustment damper, 5 is a return air ventilation duct, 6 is an outside air intake duct, 7 is an intake outside air detector, and 8 is an outside air detector. A damper open / close state detector, 9 is a necessary intake outside air amount calculation formula, 10 is a required intake outside air amount determining means, 11 is an intake outside air amount adjusting proportional damper opening degree determining means,
Reference numeral 12 is the same opening control means, 13 is an intake outside air amount adjustment proportional damper, 13a is an outside air amount adjusting proportional damper control unit, 14 is an intake outside air amount control device, 15 is an outside air intake port, and 16 is an ambient air amount adjusting proportional damper. , 16a are proportional damper control units for controlling the amount of recirculated air.

Next, the operation will be described with reference to the control operation sequence flowchart of FIG. First, the controller 1
4, the items necessary for starting the operation and the initial value of the opening degree of the intake outside air amount adjustment proportional damper 13 are set, and the process enters into the control loop. In step S2, the open / closed state of the air volume control damper 4 is detected by a signal from the damper open / closed state detector 8, and in step S3, the intake outside air amount is detected. Next, in step S4, a required intake outside air amount is determined from the opening degree of each air amount adjusting damper 4 detected in step S2 and the required outside air amount when each air amount adjusting damper 4 is fully opened. In step S5, step S3
The opening degree of the intake outside air amount adjustment proportional damper 13 is determined by comparison with the required intake outside air amount detected in step S3. That is, when the determined required intake air amount is larger than the detected intake air amount, the opening of the intake air amount adjusting proportional damper 8 is increased, and in the opposite case, the intake air amount adjusting proportional damper is opened. To reduce. Further, instead of using the intake outside air amount adjustment proportional damper 13 and its control unit 13a, the recirculation amount adjustment proportional damper 16 and its control unit 16a may be used. That is, when the determined required intake air amount is larger than the detected intake air amount, the opening amount of the recirculation amount adjustment proportional damper 16 is reduced to reduce the recirculation amount, and as a result, the recirculation amount is reduced. Do more. In the opposite case, the degree of opening of the recirculation amount adjusting proportional damper 16 is increased to increase the recirculation amount, and as a result, the intake outside air amount is reduced. In step S6, step S
A control instruction of the opening degree of the intake outside air amount adjustment proportional damper 16 is performed so that the opening degree determined in step 5 is obtained. Step S7 is a holding process for performing the processing loop of steps S2 to S6 at predetermined time intervals.

[0004]

Since the conventional intake outside air amount control device is constructed as described above, the intake outside air amount is limited in advance, and the intake outside air amount is different for the airtight performance of various houses. Since the range of can not be changed, the air conditioning load may increase, and the opposite case is also possible, especially in a house with good airtightness, the intake outside air volume is insufficient and it may adversely affect the human body. is expected,
There was a problem such as.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to set the range of the intake outside air by switching the range of the intake outside air in consideration of the airtightness of the house, the number of people in the room, and the air conditioning load. The purpose is to control the optimal ventilation rate even for houses with various airtight performances.

[0006]

DISCLOSURE OF THE INVENTION A duct type air conditioner according to the present invention is a ventilation air blower that secures a ventilation air flow rate, and a ventilation air flow rate measurement that detects the ventilation air flow rate of the ventilation air blower and measures the actual ventilation air flow rate. Means, and a ventilation blower comprising a ventilation air volume adjusting means provided with a driving means for driving the damper and the damper, is provided between the outer wall and the suction part of the duct type air conditioner, and the indoor temperature of a plurality of air-conditioned rooms is increased. Is required to measure the heat load of each air-conditioned room, a set air volume determination means for determining the set air volume for each air-conditioned room based on the output of this heat load measurement means, and each air-conditioned room. Ventilation air volume dilution rate variable width switching means for switching the variable width of the ventilation air volume, and ventilation air volume dilution rate determining means for determining the ventilation air volume dilution rate required for the air-conditioned room by the switching amount of the ventilation air volume dilution rate variable width switching means. And the above settings It is obtained by a ventilating air amount determining means for determining the actual ventilation power from set airflow and ventilation air volume ratio of dilution from the amount determining means and ventilation power dilution ratio determining means.

[0007]

In the duct type air conditioner according to the present invention, the ventilation air volume dilution rate variable width that differs depending on the airtightness of the house is switched by the output of the ventilation air volume dilution rate variable width switching means to determine the ventilation air volume dilution rate. The ventilation air volume required for the operation is determined from the dilution rate that can satisfy all the required ventilation air volume in each room by the output of the set air volume determination means in each room, which is determined by the heat load change state in each room of the air-conditioned room. The ventilation air blower is driven so that this ventilation air volume can be obtained, and based on the value measured by the ventilation air volume measurement means, the damper of the air flow adjustment means is opened and closed to determine the ventilation air volume. The ventilation air volume determined by the above is adjusted.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, 17 is a ventilation blower installed in the duct part 11 between the suction part 5 and the outer wall of the duct type air conditioner in order to attract the outside air to each room 1 of the plurality of air-conditioned rooms. The ventilation blower 18 to be secured, the ventilation air flow rate measuring means 19 for detecting the ventilation air flow rate of the ventilation blower 18 and measuring the actual ventilation air flow rate, and the drive means (not shown) for driving the damper 20a and the damper 20b. And the ventilation air flow rate adjusting means 20. Two
Reference numeral 1 is a heat load measuring means for detecting the indoor temperature of a plurality of air-conditioned rooms 1 and measuring the heat load of each air-conditioned room 1, 22 is an air-conditioned room by the measurement output from the room temperature sensor 21a of the heat load measuring means. A set air volume determining means for determining the set air volume for each
Reference numeral 23 is a ventilation air volume dilution rate variable width switching means for each air-conditioned room 1
The variable width of the required ventilation air volume is switched. 24
Is a ventilation air volume dilution rate determining means for determining the ventilation air volume dilution rate required for the air-conditioned room 1 by the switching amount of the ventilation air volume dilution rate variable width switching means 23, and 25 is these set air volume determination means 22.
And the ventilation airflow dilution rate determining means 24 and the ventilation airflow rate determining means for determining the actual ventilation airflow rate from the set airflow rate output and the ventilation airflow dilution rate output, and outputs to the ventilation airflow rate adjusting means 20 of the ventilation device 17 for ventilation. The damper 20a is adjusted for opening and closing.

The control contents of the present invention will be described with reference to the control block diagram of FIG. In the duct type air conditioner according to the present invention, the ventilation air volume dilution ratio variable width switching unit 23 that changes the airtightness of the house determines the dilution ratio variable width. As shown in Fig. 3, the variable range of the dilution rate indicates the range of change in the amount of outside air introduced with respect to the air flow rate of the main air conditioner according to the value of the natural ventilation frequency that represents the airtightness of the house. The ratio of the amount of outside air introduced to the air volume is the variable range of the ventilation air volume dilution rate. The following controls will be performed based on the variable range of this ventilation air volume dilution rate. The set air volume of each room is determined by the set air volume determination means 22 based on the heat load change state of each room 1 of the plurality of air-conditioned rooms.

Next, the optimum dilution rate that can satisfy all the required ventilation air volumes in each room is determined by the correlation between the set air volume of each room and the ventilation air volume required for that room, and the optimum ventilation rate that can satisfy all the required ventilation air volumes of each room. The dilution rate is determined, and the ventilation air flow rate determining means 25 determines the ventilation air flow rates required for the plurality of air-conditioned rooms at that time. The ventilation blower 18 is driven so as to obtain this ventilation air volume, and the damper 20a of the air flow adjusting means 20 is based on the value measured by the ventilation air volume measuring means 19.
Adjust the opening and closing degree of.

[0011]

As described above, according to the present invention, a ventilation blower that secures a ventilation air flow rate, and a ventilation air flow rate measuring means that detects the ventilation air flow rate of the ventilation blower and measures the actual ventilation air flow rate, A ventilation blower consisting of a damper and a ventilation air flow rate adjusting means provided with a drive means for driving the damper is provided between the outer wall and the suction part of the duct type air conditioner to detect the indoor temperature of a plurality of air-conditioned rooms. , A heat load measuring means for measuring the heat load of each air-conditioned room, a set air volume determining means for determining a set air volume for each air-conditioned room based on the output of the heat load measuring means, and a ventilation air volume required for each air-conditioned room. The ventilation air volume dilution rate variable width switching means for switching the variable width of the ventilation air volume dilution rate, and the ventilation air volume dilution rate determining means for determining the ventilation air volume dilution rate necessary for the air-conditioned room by the switching amount of the ventilation air volume dilution rate variable width switching means. Replaced with set air volume determination means Since it is equipped with a ventilation air flow rate determination device that determines the actual ventilation air flow rate from the set air flow rate and ventilation air flow rate dilution rate from the air volume dilution rate determination means, an optimal ventilation air volume is secured for a house with various airtight performances. In addition, since it is used as a part of the duct type air conditioner, the required ventilation air volume for each room can be sufficiently secured. Furthermore,
Since the ventilation loss can be suppressed to the minimum, it has the effect of improving energy saving.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a duct type air conditioner that is an embodiment of the present invention.

FIG. 2 is a flowchart showing the ventilation amount control of FIG.

FIG. 3 is a characteristic diagram showing a ventilation volume dilution rate with respect to the airtightness of the house of FIG.

FIG. 4 is an overall configuration diagram showing a conventional duct type air conditioner.

5 is a control block diagram of a main part of FIG.

FIG. 6 is a flowchart showing the ventilation amount control of FIG.

[Explanation of symbols]

 6 Outside Air Intake Duct 6a Suction Part 17 Ventilation Blower 18 Ventilation Blower 19 Ventilation Air Volume Measuring Means 20 Ventilation Air Volume Adjusting Means 20a Damper 21 Heat Load Measuring Means 22 Set Air Volume Determining Means 23 Ventilation Air Volume Dilution Rate Variable Range Switching Means 24 Ventilation Air volume dilution rate determining means 25 Ventilation air volume determining means

Claims (1)

[Claims] 1. A centralized air-blowing means for distributing air to a plurality of air-conditioned rooms by a blower through a duct, and a cool air or a warm air volume by opening and closing dampers installed in the duct portion to the air-conditioned rooms. The blower amount adjusting means to be adjusted, and the damper opening degree of the blower amount adjusting means, during the test operation, the opening and closing degree is changed for each one, while the other is fully closed, and the blower amount of the blower is adjusted. Air volume measuring means for detecting and measuring the actual air volume, pressure measuring means for detecting the air pressure in the duct by the blower and measuring the actual pressure in the duct, and these pressure measuring means and air volume measuring means And a damper control means to calculate the correlation between the air flow rate of the air flow rate adjusting means, the opening / closing degree of the damper, and the pressure inside the duct, and the air flow rate calculating means for calculating the air flow resistance. In the air conditioner, a ventilation air blower that secures a ventilation air flow rate, and a ventilation air flow rate measuring means that detects the ventilation air flow rate of this ventilation air blower and measures the actual ventilation air flow rate,
A ventilation blower consisting of a damper and a ventilation air flow rate adjusting means provided with a drive means for driving the damper is provided between the outer wall and the suction part of the duct type air conditioner to detect the indoor temperature of a plurality of air-conditioned rooms. , A heat load measuring means for measuring the heat load of each air-conditioned room, a set air volume determining means for determining a set air volume for each air-conditioned room based on the output of the heat load measuring means, and a ventilation air volume required for each air-conditioned room. The ventilation air volume dilution rate variable width switching means for switching the variable width of the ventilation air volume dilution rate, and the ventilation air volume dilution rate determining means for determining the ventilation air volume dilution rate necessary for the air-conditioned room by the switching amount of the ventilation air volume dilution rate variable width switching means. A duct type air conditioner comprising: a set air volume determining means and a ventilation air volume dilution rate determining means, and a ventilation air volume determining means for determining an actual ventilation air volume from a set air volume and a ventilation air volume dilution rate.