JPH06103115B2 - Air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a duct type air conditioner adopting a variable air flow rate control system capable of independently adjusting the room temperature of each room, and particularly to its on / off state. The present invention relates to a control method of a controlled damper.

[Prior Art] Variable air volume control of a duct type air conditioner (hereinafter referred to as "VAN")
There is a throttle type and a bypass type, and there are a two-position control (on / off control) type and a proportional control type depending on the damper control method.

Japanese Patent Application Laid-Open No. 58-81438 can be cited as a prior art relating to the diaphragm-type two-position control system.

This reduces the temperature difference between the top and bottom of the room during heating, and controls the damper on / off to improve comfort.For example, when heating, the damper is turned on when the current room temperature is below the set room temperature. On / off control is performed for the maximum opening, the minimum opening when the temperature exceeds the maximum opening, and the maximum opening and the minimum opening at a certain cycle when the temperature is near the set room temperature.

That is, the difference between the detection signal of the room temperature detection sensor and the signal of the room temperature setting device is input to the differential amplifier, is input to the on / off time difference generator together with the signal from the pulse generator, and the on / off control signal is output to the damper. To be done.

At this time, the total air volume of the duct changes according to the total opening of the dampers, and the pressure inside the duct rises and falls.However, the pressure sensor detects the signal to control the capacity of the air conditioner blower, Keep constant.

Further, as a second conventional technique, there is JP-A-51-119146.

In this system, the duct is equipped with an electric or electromagnetic damper, and the damper is controlled to open during full opening by a signal from the room thermostat to control the room temperature. The damper in the room that does not require air conditioning can be fully closed by a manual switch. In addition, a similar one is used.
There is 87949 publication.

As a third conventional technique, Japanese Patent Publication No. Sho 57-169525 can be cited.

This is mainly for the purpose of improving the feeling of cool air during cooling, and it keeps the total air volume of the duct constant and sifts this air volume by the damper operation of multiple air outlets. The wind blows intermittently when I see.

However, the operation of the damper in the third conventional technique is not performed for the purpose of room temperature control.

A fourth conventional technique is disclosed in Japanese Utility Model Publication No. 48-26056.

This is to forcibly open one specific damper when trying to close all of the on / off type dampers so that they are not all closed at the same time. .

[Problems to be Solved by the Invention] In the air conditioner according to the first prior art described above, the indoor temperature distribution during heating is improved and the room temperature can be controlled to the set value, but the number of dampers is small and the damper When the opening is controlled to be fully open and fully closed, there are frequent opportunities for all dampers to be fully closed at the same time, and the heat source unit and blower must be stopped and restarted each time. As a result, there are problems such as a deviation from the set value of room temperature and an increase in the number of times the heat source device is turned on and off.

Especially in the case of a residential system, the number of rooms is small,
Since forced ventilation is often not performed and the heat load is small, the above problems are likely to occur.

Further, in the air conditioner of the second conventional technique, the damper is controlled to be fully open or medium open, so the heat source device and the blower are not frequently stopped, but the room temperature is set when the heat load is small. There is a problem that the room temperature exceeds the set value during heating because the value cannot be controlled sufficiently accurately.

Furthermore, in the air conditioner of the fourth prior art, when all the dampers are going to be closed, one particular damper is forcibly opened, so that the room temperature of this room is set to the set value as desired. There was a problem that it could not be controlled and it was against energy saving.

As a technique that takes these problems into consideration, Japanese Patent Laid-Open No. Sho 61-1952
No. 33 publication is cited.

This is configured so that when the heat load decreases and all the dampers in each room are closed, the dampers in the specific room are temporarily forcibly opened and the stop of the heat source machine is postponed. It eliminates the frequent on / off operation of.

However, when the heat load decreases and the dampers in each room are fully closed, if you temporarily forcibly open the dampers in a specific room, you can delay the stoppage of the heat source unit for a predetermined time. Although the probability of stopping the heat source unit after the lapse of time decreases, there are times when the stop of the heat source unit is simply delayed, and it is not always possible to extremely reduce the on / off operation of the heat source unit. Or, the capacity of the heat source machine is not effectively used, the heat source machine cannot be downsized, the air flow distribution to each room becomes poor, the wind noise of the damper is large, and the temperature of each room is maintained in a comfortable temperature zone in advance. do not do. In particular, there is a problem that the temperature of each room is not maintained in the comfortable temperature zone during the defrosting operation. The present invention has been made to solve such a problem, and in both defrosting operation and cold / warm air operation, the capacity of the heat source machine is always effectively utilized, and the heat source machine can be downsized and each room The airflow distribution to the air flow is good, the wind noise of the damper is low,
The purpose is to obtain an air conditioner that maintains the temperature of each room in a comfortable temperature zone.

[Means for Solving Problems] An air conditioner according to the present invention switches a heat source device that generates cold air or warm air and the operation of the heat source device to either cold air, warm air, or defrosting operation. A heat source device controller for controlling, a blower for blowing the cold / warm air generated by the heat source device, a duct for guiding the cold / hot air blown by this blower to each room, and each room of this duct It is provided on the branch that leads,
A damper that blows and stops the cold and warm air by opening and closing, and the temperature of each room that changes due to the blowing and stopped cold and warm air of the damper are detected, and the detected temperature and a preset temperature Comparing the room thermostat, the heat load of each room is calculated based on the comparison result of this room thermostat, the heat load measuring means for determining the rank of the heat load of each room by the calculation result, and this heat load A damper opening degree determining means for determining the opening degree of each of the room dampers based on the calculation result of the measuring means, the determination result of the damper opening degree determining means and the heat load of each room determined by the heat load measuring means. Based on the ranking and the defrosting operation signal of the heat source device controller, during the defrosting operation in which the defrosting operation signal of the heat source device controller is received, the damper opening degree determining means determines Based on the opening degree of each room damper described above, the dampers of each room having a higher load order are closed, the dampers of each room having a lower load order are opened, and the total opening value of each room damper is set. Is corrected at a rate exceeding a preset opening value, and the total opening value of each room damper is preset during cold / hot air operation when the defrosting operation signal is not received. When the opening value is exceeded, the opening of each room damper determined by the damper opening determining means is not corrected, and when the total opening value of each room damper is equal to or less than the preset opening value. , Damper opening correction means for sequentially correcting the opening degree of the damper from the room having the higher heat load rank from closed to open, and controlling the opening degree of each room damper based on the correction result of the damper opening correction means With a damper control means, That.

[Operation] In the present invention, in both the defrosting operation and the cold / warm air operation, the total opening value of each room damper is always maintained to exceed the preset opening value.

[Embodiment] An embodiment of the air conditioner of the present invention will be described below with reference to the drawings.

FIG. 1 is a principle diagram showing the basic configuration of the first embodiment of the present invention.

As is apparent from FIG. 1, a heat source device 1 and a blower 2 that generate cold air or hot air, a duct 3 that distributes the cold air or hot air to each room, and a branch portion of the duct 3 that communicates with each room. The dampers 4a to 4d arranged in the room and the room thermostats 5a to 5d installed in each room, and the heat load measuring means 6 for inputting the signals of the room thermostats 5a to 5d measures the heat load of each room. And the order of the size thereof are measured, and the damper opening degree determining means 7 determines the opening degree of the dampers 4a to 4d in each room to open or close based on this heat load. When the total opening is less than a certain value (minimum total opening), the damper opening correction means 8
The damper opening degree of the room having a large heat load is corrected to open under a certain condition, and the damper control means 9 controls the dampers 4a to 4d to open or close based on the result. .

FIG. 2 is a system configuration diagram of the entire air conditioner to which the principle system of FIG. 1 is applied.

In the figure, 10 is an indoor unit that constitutes a heat pump as a heat source unit 1 installed on the ceiling of a house or the like, and is provided with a blower 2, a filter 11 and a heat exchanger 12 inside. 13
Is an outdoor unit installed outdoors. Reference numeral 14 is a branch duct that branches from the duct 3 connected to the indoor unit 10 to each of the rooms 35a to 35d, and 15a to 15d are VAV units installed in the middle of the branch ducts 14a to 14d, which are opened by a motor or the like. It incorporates dampers 4a-4d that are controlled to be closed.

The outlets 16a to 16d are connected to the ends of the branch ducts 14a to 14d, and the suction ports 17a to 17d are attached to each room.

Further, a ceiling suction port 18 is provided on the suction side of the indoor unit 10, and a control device 19 is attached to the indoor unit 10.

Further, a temperature detector 20 and a pressure detector 21 are provided in the duct 3.

Although not shown, the room thermostats 5a to 5d are provided with a room temperature detector and a room temperature setting device. In addition, one of the room thermostats 5a to 5d also serves as a main controller that turns on / off the power and switches between heating and cooling.

FIG. 3 is a specific circuit configuration diagram of the control device 19.

In the figure, 22 is a microcomputer constituting the control device 19, which includes a CPU 23, a memory 24, a timer 25, an input circuit 26,
And an output circuit 27.

Reference numeral 28 is an analog multiplexer into which the detection signals of the room thermostats 5a to 5d, the temperature detector 20 and the pressure detector 21 are input. The output of the analog multiplexer 28 is converted into a digital signal by an A / D (analog / digital) converter 29 and taken into the CPU 23 via the input circuit 26.

The output circuit 27 is connected to the heat source device controller 3 via the photo coupler 30a.
1 is connected. The heat source machine controller 31 is composed of an inverter, and its output is supplied to the heat source machine 1.

Similarly, the blower controller 32 is connected to the output circuit 27 via the photocoupler 30b. The blower controller 32 is composed of an inverter or the like and controls the blower 2.

Furthermore, each damper controller 33 is connected to the output circuit 27 via a photocoupler 30c. Each damper controller 33 is composed of a relay or the like as damper control means, and controls the dampers 4a to 4d to open or close.

Reference numeral 34 is a power source that supplies AC or DC power to the heat source device controller 31, the blower controller 32, and the damper controller 33.

Next, the heating operation will be described with reference to FIGS. 4 and 5 regarding the operation of the above embodiment.

FIG. 4 is a flow chart showing a control program of the damper control portion stored in the memory 24 of the microcomputer 22, and FIG. 5 is an operation explanatory diagram showing a state of the controlled room temperature with respect to the set room temperature.

First, the heat load measuring means 6 executes the processing shown in steps 40 to 43. That is, from the room thermostats 5a to 5d of each room, the values of the room temperature T (I) and the set room temperature R (I) of the room are the analog multiplexer 28 and the A / D converter 2
9. It is input to the CPU 23 via the input circuit 26 (step 40). However, I in the above parentheses indicates a room number.

In the next step 41, the damper control timing is checked, and if it is the control timing, proceed to the next step 42,
If it is not the control timing, the routine for damper control is exited. In step 42, R (I) -T (I) of each room
(At the time of cooling operation, (I) -R (I)) to heat load D (I)
Is required.

In the next step 43, the room with the largest heat load (the room with the largest D (I)) to the room with the smallest heat load (the room with the smallest D (I)) is determined according to the size of D (I).

In the next step 44, it is determined whether the heat source device 1 is being defrosted, and if it is not being defrosted, the process proceeds to the next step 45.

In step 45 as the damper opening determination means 7, D
The size of (I) determines whether the damper of each room is opened or closed.

As shown in FIG. 5, for example, if the current room temperature T (I) is higher than the set room temperature R (I) by A ° C. or more, the dampers 4a to 4d are closed, and T (I) is more than R (I) than B (B). Damper if lower than ℃
Open 4a-4d, T (I) is R (I) + A or R (I)
When the temperature is within the range of −B ° C., the opening is not changed.

Next, in the damper opening correction means 8, step 46 to step
The process of 52 is executed. In step 46, the total opening degree of the dampers determined in step 45 is obtained (if three dampers are open, the integrated value of the opening degree of each damper is determined to be 300%).

Next, at step 47, the total opening of the dampers 4a-4d is determined,
If it is 200% or more, the process proceeds to step 53 described later. In this embodiment, the minimum total opening is 200%. Total opening is 1
00%, that is, if only one damper is open, proceed to the next step 48. In step 48, the dampers of the room having the largest heat load and the room having the second largest heat load obtained in step 43 are opened to set the total opening to 200%.

The control in step 48 is repeated at any time as long as there is a room where the room temperature does not reach the set room temperature. After the processing of step 48 is completed, the routine proceeds to step 53. If it is determined in step 47 that the total opening is 0%, the process proceeds to step 49.

In step 49, it is judged whether or not the state of the total opening degree of 0% has continued, for example, three times or more. If it is within 3 times, go to the next step 50.

In step 50, the opening degrees of the dampers 4a to 4d are calculated again. If the room temperature T (I) is lower than the set room temperature R (I) + A, the dampers are opened.

The damper that was originally determined to be closed in step 45 is T
If the relation of (I) <(R (I) + A) is satisfied, it is changed to open.

This judgment is applied only to the room with the largest heat load, and when T (I) <(R (I) + A), the room with the largest heat load and the room with the second largest heat load are applied. Correct the damper to open so that the total opening of the damper is 200%.

In the next step 51, the total opening of the dampers 4a-4d is calculated again. In the next step 52, the total opening is determined, and if it is not 0% (that is, 200%), the process proceeds to the next step 53. In step 53 as the damper control means 9, the output circuit 27,
A signal is output to the damper controller 33 via the photocoupler 30c to control the dampers 4a to 4d to open or close.

If it is determined in step 44 that defrosting is in progress, the process proceeds to step 55, where the dampers of the room with the smallest heat load and the room with the second smallest heat load are opened, and the dampers of the other rooms are closed. , Go to step 53. According to this control, the phenomenon that the room temperature is lowered by the cold air during defrosting due to the reverse cycle operation of the heat pump is alleviated. Further, in step 49, the total opening of the dampers 4a-4d is 0.
When the condition of% is judged to be 3 times or more,
When it is determined in 52 that the total opening is 0%, the process proceeds to step 54. Step 54 is a special subroutine to stop the heat source unit 1 and the blower 2.

After that, although details are omitted, the temperature detector 20 and the pressure detector
After the detection signal of 21 is digitized by the A / D converter 29 through the analog multiplexer 28, it is passed through the input circuit 26 and the CPU 2
Entered in 3.

The output of this CPU 23 is output circuit 27 and photocouplers 30a, 30b.
A control signal is sent to the heat source machine controller 31 and the blower machine controller 32 respectively via the. Thereby, the heat source unit 1 and the blower 2
The capacity of the blower is varied, and the temperature and pressure of the blown air are controlled to be substantially constant. The above control is repeated by the timer 25 at regular intervals.

As described above, according to this control, the warm air is blown out from the air outlets 16a to 16d.
It is blown out into the room more intermittently. When the dampers 4a to 4d are turned on, the airflow has a large air volume (air velocity), so that the airflow reaches near the floor surface, the vertical temperature difference in the room becomes small, and the temperature distribution becomes good.

In addition, the chances that all the dampers 4a to 4d are closed at the same time is reduced, the number of times the heat source unit 1 and the blower 2 are turned on and off is reduced, and stable operation can be performed. Furthermore, since the minimum total opening of the damper is 200%, the heat source unit 1 and the blower 2 do not operate with low efficiency and small air volume.

In the above embodiment, the number of dampers is four and the minimum total opening is 200%. However, for example, the number of dampers is six.
Minimum total opening of 300% for 3 units, 100% for 3 units
It is advisable to determine the minimum total opening degree in accordance with the number of dampers and the variable capacity range of the heat source unit 1 and the blower unit 2, such as 100% for four units.

Further, in the above-described embodiment, it is determined in step 49 whether or not the damper total opening degree is 0% three times or more.
The number of times is not limited to three, and step 49 can be omitted.

The values of A and B in FIG. 5 can be set freely.

Now, in the above embodiment, the total opening degree in step 47 is 100
%, In step 48, the dampers of the two rooms with large heat loads were corrected to open, and the total opening was set to 200%. In this case, the room temperature has already reached the set room temperature.
The room temperature of the second largest room sometimes exceeded the set room temperature. Further, in the above-described embodiment, the relationship between the number of dampers and the minimum total opening is not automatically selected. An improvement of this point is shown below.

FIG. 6 is a flow chart showing a second embodiment of the control program of the damper control section stored in the memory 24 of the microcomputer 22, and FIG. 7 is an operation explanatory diagram showing the relationship between the set room temperature and the room temperature. Since the steps 40 to 46 shown in the flowchart of FIG. 4 are the same, they are omitted in FIG. 6, and step 53 and step 54 represent the same contents.

Steps 56 to 71 are processing routines of the damper opening correction means 8. First, the total number of dampers (number of dampers) installed in step 56 is determined. This number of dampers is entered in the memory 24 in advance when the system is installed. If the number of dampers is 3 or less, the routine proceeds to step 57, where the minimum total opening is controlled to 100%. When the total opening is 100% or more in step 57, no special control is performed and the process proceeds to step 70 described later. When the total opening is 0%, the routine proceeds to step 58, where the room temperature T (I) of the room with the maximum heat load is compared with the set room temperature R (I), and T (I) <(R (I) + A ), The process proceeds to the next step 59. In step 59, it is judged whether or not the state of the damper total opening 0% is three times or more in succession. If it is three times or more, the damper opening is not corrected and the process proceeds to step 70. In step 58, T (I) <(R (I)
+ A), the 0% condition is 3 at step 59.
If it is within the number of times, go to step 60 and correct the damper in the room with the maximum heat load from closed to open. Originally, the damper opening is changed from closed to open when the room temperature enters the G zone, but the room temperature of the room with the maximum heat load is temporarily set to F so that the heat source device 1 is not frequently stopped. When in the zone, open the damper in this room. By this control, the average room temperature of the room with the maximum heat load is slightly higher than the set room temperature R (I), but does not significantly exceed it. Also, when the room temperature of the room with the maximum heat load is in the E zone, correct it to open up to three times (step
59). This control is not so preferable because it controls the room temperature to be high, and the number of times is limited to three times. During this period, the room temperature drops and the room temperature drops to F zone or G.
There is a possibility that the room with the highest heat load may change to the zone, and the room temperature is not controlled to a high level in only one specific room.

When the number of dampers is 4 or more in step 56, the process proceeds to step 61 to control the minimum total opening to 200%.

When the total opening is 200% or more in step 61, no special control is performed and the process proceeds to step 70. When the total opening is 0%, the routine proceeds to step 62, where the room temperature T (I) of the room with the maximum heat load is compared with the set room temperature R (I), and if the relationship of T (I) <(R (I) + A) is not satisfied. If no special control is performed, the process proceeds to step 70.

When the total opening is 100% in step 61, the process proceeds to step 63, where the room with the maximum heat load is T (I) <(R (I)
If the relationship is −B), the process proceeds to the next step 64. Step
In 64, the room with the second highest heat load is T (I) <(R
In the case of the relationship of (I) + A), the process proceeds to the next step 65, in which the tamper of the room with the maximum heat load and the room with the second largest heat load are opened and the process proceeds to step 70. When it is determined in step 62 that the room with the maximum heat load is T (I) <(R (I) + A), and in step 63, the room with the maximum heat load is T (I) <(R (I) − When it is determined that it is not B),
Both proceed to step 66. In step 66, if it is determined that the room with the second highest heat load has a relationship of T (I) <(R (I) + A), the process proceeds to step 65. If NO is determined, the process proceeds to step 67. move on. In step 67, modify the dampers that are currently open to close (all dampers closed)
Proceed to step 70.

In step 64 above, the room with the second highest heat load is T
If it is determined that the relationship of (I) <(R (I) + A) is not satisfied, the process proceeds to step 68. In step 68, if the room having the maximum heat load has a relationship of T (I) <(R (I) -C), the process proceeds to step 65. If not, the process proceeds to step 69. In step 69, the number of times passing through step 69 is counted. If it is three or more, the process proceeds to step 67, otherwise proceeds to step 65.

In this way, the control with the minimum total opening of 200% does not unnecessarily heat the room where the room temperature is around the set room temperature, and there is a room where only one room has not reached the set room temperature. In this case, control is required to bring the room temperature of this room close to the set room temperature. For example, in a system with four dampers, if three rooms have reached the set room temperature and only one room has not been reached, the minimum total opening is limited to 200%, so open the damper for only one room. It is not possible to do so, and it is necessary to judge whether all four rooms should be closed or two rooms should be opened. In steps 63 to 69, the following judgment is made.

According to the control of the second embodiment, the installed damper
The minimum total opening can be automatically set to 100% or 200% by the total number of 4a to 4d, and when the minimum total opening is 200%, the damper opening determining means 7 determines that the total opening is 100%. If it is decided, the damper opening is modified according to the room temperature of the room with the maximum heat load and the room with the second highest heat load, so each room temperature can be controlled close to the set room temperature, and the dampers 4a-4d You can reduce the chance of all being closed.

The air conditioner of the above embodiment includes dampers 4a to 4d installed on each branch portion of the duct 3 that guides warm air or cold air by the heat source device 1 and the blower 2, and room thermostats 5a to 5d installed in each room. , Room thermostat 5a for each room
Heat load measuring means 6 for detecting the signals of the room temperature and the set room temperature from 5d, measuring the heat load of each room by the difference, and calculating the order of the heat load, and the heat load measuring means 6 Based on the measurement result, the damper opening determination means 7 for controlling the room temperature of the damper opening of each room so that the room temperature falls within the allowable range of the set temperature, and the total opening of the damper based on the determination result of the damper opening determination means 7. When the degree is less than or equal to a specific value, the damper opening correction means 8 for correcting the opening of the dampers 4a to 4d in the room having a large heat load to open, and the damper of each room based on the output of the damper opening correction means 8 And a damper control means 9 for controlling the opening or closing of 4a to 4d.

Therefore, when the total opening of the damper dampers 4a to 4d determined by the damper opening determining means 7 based on the output of the heat load measuring means 6 is small, the damper opening correcting means 8 keeps the opening within a certain condition. Since it is configured to correct the total opening so as to increase, it is less likely that all the dampers 4a to 4d are closed at the same time, the heat source unit 1 and the blower 2 can be operated stably, and the room temperature is almost the same. It can be controlled to the set value. Moreover, the total opening of the dampers 4a to 4d according to the determination result of the damper opening determining means 7 that controls the room temperature so that the room temperature of the room is within the allowable range + A, -B of the set temperature. In the following case, since the opening degree of the damper in the room having a large heat load is corrected to be open, the change in the room temperature can be reduced.

Further, the damper opening correction means 8 sets the minimum total opening degree of the dampers 4a to 4d according to the number of installed dampers 4a to 4d, and the total opening degree determined by the damper opening degree determining means 7 is the minimum. When the total opening is below the maximum, the number of rooms having a large thermal load measured by the thermal load measuring means 6 is opened within a certain condition by the number of rooms satisfying the minimum total opening. The surplus heat energy can be consumed inside, and the change in the room temperature due to the effect is small.

Then, the damper opening correction means 8 includes one damper 4a.
When the opening of 4d to 4d is defined as the opening of 100%, when the minimum total opening is 200% and the total opening of the dampers 4a to 4d determined by the damper opening determining means 7 is 100%, the heat Of the heat loads of each room measured by the load measuring means 6, the dampers 4a to 4d of the room with the largest heat load and the dampers of the second room are corrected to open, so that in the room with a large heat load Excessive heat energy can be digested, and the room affected by it can be specified,
Moreover, there is little change in the room temperature.

Further, the damper opening correction means 8 includes one damper 4a.
When the opening of 4d is defined as 100% of the opening, the damper 4 determined by the damper opening determining means 7 with the minimum total opening of 100%.
When the total opening of a to 4d is 0% (fully closed), the room temperature of the room having the largest heat load among the heat loads of the respective rooms measured by the heat load measuring means 6 is within the allowable range of the set temperature. When it is not inside, the dampers 4a to 4d of the corresponding room are corrected to open, and when the room temperature of the room with the largest heat load is not within the allowable range of the set temperature, excess in the corresponding room. The heat energy is consumed, and the change in the room temperature of the room is set as the set temperature.

Furthermore, when the opening of one damper 4a to 4d is defined as 100% of the opening, the damper opening correction means 8 determines the minimum total opening of 200% by the damper opening determination means 7. When the total opening of the dampers 4a to 4d is 0%, the room temperature of the room with the largest heat load among the heat loads of the respective rooms measured by the heat load measuring means 6 falls within the allowable range of the set temperature. If not, the dampers 4a to 4d of the corresponding room and the second room are corrected to open, so surplus heat energy can be consumed in a room with a large heat load, and the room due to the effect can be specified. And, there is little change in the room temperature.

The damper opening correction means 8 has a minimum total opening of 20.
When the damper opening degree determined by the damper opening degree determining means 7 is 0% and is 100% or 0%, the heat load of the room having the largest heat load and the heat load of the second room are compared, and the magnitude is compared. Depending on the relationship, the dampers 4a to 4d of the two rooms are corrected to be opened or all the dampers 4a to 4d are corrected to be closed, so that it is possible to respond according to the magnitude relationship of the heat load. .

In addition, the opening degree correction by the damper opening degree correction means 8 is limited to a specific number of times, and when the number of times is more than that, correction is not performed. It does not change significantly.

[Effects of the Invention] As described above, since the air conditioner of the present invention is configured as described above, during the cold / warm air operation, the cold / warm air blown from the damper has a reverse temperature.・ In the defrosting operation where the wind is cold, the room temperature does not reach the comfort zone target temperature.Close the dampers in each room with a higher heat load rank and close the dampers in each room that has reached the comfort zone target temperature. Open and always maintain the total opening value of each room damper above the set opening value, maintain the temperature of each room in the comfortable temperature zone, and in cold air and hot air operation,
When the total opening value of each room damper exceeds the set opening value, that is, when the heat balance between the capacity of the heat source device and the total heat load of each room is almost maintained, the heat balance is maintained. , When the capacity of the heat source device becomes larger than the total heat load of each room and the total opening value of the dampers in each room becomes less than the set opening value, the dampers that are closed from the room with the higher heat load rank are opened sequentially. Therefore, the total opening value of each room damper is always maintained above the set opening value, and in order to blow cold / warm air in advance so that the temperature of each room does not exceed the range of the comfortable temperature zone, the heat source is always The capacity of the machine can be effectively utilized, the heat source machine can be downsized, the air flow distribution to each room is good, the wind noise of the damper is small, and the air conditioner that keeps the temperature of each room in the comfortable temperature zone can be obtained. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a principle diagram showing a basic configuration of an air conditioner in a first embodiment of the present invention, and FIG. 2 is a system showing an entire air conditioner in a first embodiment of the present invention. FIG. 3 is a block diagram showing the configuration of the control device for an air conditioner in the first embodiment of the present invention, FIG. 4 is a flow chart for explaining the operation of the control device in FIG. 3, and FIG. Explanatory drawing showing the relationship between the set room temperature and room temperature for explaining the air conditioner in the first embodiment of the present invention, FIG. 6 is a flow chart for explaining the operation of the control device of the second embodiment of the present invention, FIG. 7 is an explanatory view showing the relationship between the set room temperature and the room temperature for explaining the second embodiment of the present invention. In the figure, 1: heat source device 2: blower 3: ducts 4a to 4d: dampers 5a to 5d: room thermostat 6: heat load measuring means 7: damper opening determining means 8: damper opening correcting means 9: damper control means is there. In the drawings, the same reference numerals and symbols indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A heat source device for generating cold air or warm air, a heat source device controller for controlling the operation of the heat source device to be switched between cold air, warm air, and defrosting operation, and for generating the heat source device. A blower for blowing the cold / warm air, a duct for guiding the cold / warm air blown by the blower to each room, and a branch portion for guiding each room of this duct, and opening / closing the cool / hot air A damper that blows out and stops hot air, and a room thermostat that detects the temperature of each room that changes due to blowing out of this damper, stopped cold, and hot air, and compares the detected temperature with a preset temperature, The heat load of each room is calculated based on the comparison result of this room thermostat, and the heat load measuring means for determining the order of the heat load of each room based on the calculation result, and the calculation result of this heat load measuring means. Above Damper opening determining means for determining the opening of the room damper, the determination result of the damper opening determining means and the order of the heat load of each room determined by the heat load measuring means, and the heat source machine controller Based on the defrosting operation signal, during the defrosting operation receiving the defrosting operation signal of the heat source device controller, the opening degree of each room damper determined by the damper opening degree determining means is set to the heat value. Based on load ranking,
Close the damper of each room with a high load rank, open the damper of each room with a low load rank, and correct the total opening value of each room damper at a rate exceeding the preset opening value, Further, during the cold / warm air operation not receiving the defrosting operation signal, when the total opening value of each room damper exceeds a preset opening value, the damper opening determining means If the total opening value of each room damper is not more than the preset opening value without correcting the determined opening of each room damper, the damper openings are closed sequentially from the room with the higher heat load rank. A damper opening correction means for correcting the opening from each of the room dampers based on the correction result of the damper opening correction means,
An air conditioner characterized by having.