JP3503123B2 - Automatic operation device of air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically controls a comfortable room temperature by an air conditioner.

[0002]

2. Description of the Related Art A compressor and two heat exchangers are provided.
The high temperature and high pressure refrigerant compressed by the compressor is sent to one heat exchanger to liquefy while warming the air passing through the heat exchanger. There is known a refrigeration circuit in which the liquefied refrigerant is sent to the other heat exchanger through the capillary, vaporizes while cooling the air passing through the heat exchanger, and returns to the compressor again.

In order to perform air conditioning in the room by this refrigeration circuit, the operation of the compressor and the operation of the blower are usually controlled by the temperature data of the temperature sensor.
A single operating system, which is suitable for normal use to create a comfortable indoor space, does not always require a comfortable room in a short time when it is started when the room temperature is abnormally high or when it is started in a low temperature and high humidity room. It cannot be air-conditioned.

Therefore, a plurality of operation modes are set in advance, a preferable operation mode is selected according to the room temperature data of the temperature sensor, the operation is performed for a predetermined period of time depending on the selected operation mode, and then the room temperature is again set. The data is read and the operation mode is reset at this point.

[0005]

When the operation mode is selected based on the difference between the preset desired room temperature and the temperature data of the temperature sensor, for example, when the temperature difference is large, cooling (heating) which is stronger than room temperature stability. Is required
When the temperature difference is small, stability at room temperature is required, and it is expected that comfortable air conditioning will be expected by automatically selecting this operation mode, and in many cases it was sufficiently satisfactory.

However, when the operation mode is reset every time after a certain period of time, the expected operation mode is not selected and the compressor is operated in a strong condition such as when there is a large difference from the set temperature even though the room is already stable. In some cases, you may select an operation mode in which there is a large variation in room temperature for continuous operation.
Although the reason was not clear, there is a problem that the expected comfortable air conditioning cannot be obtained.

[0007]

The present invention ensures that the expected operation mode is selected at the time of resetting the operation mode at regular time intervals. The air intake port 2 is provided in the frame body 1 installed in the room. And an air outlet 3, and a heat exchanger 4 that faces the inside of the air inlet 2 and a blower 5 whose discharge side is located at the air outlet 3 near the heat exchanger 4, and The outdoor heat exchanger 6, the compressor 7, and the heat exchanger 4 are connected by a refrigerant pipe 8, a temperature sensor 9 is provided in the vicinity of the heat exchanger 4, and a room temperature setting means 10 is provided in the frame 1. controls the compressor 7 and fan 5 by the chamber temperature setting means 10 and the temperature data of the temperature sensor 9, and stores the beforehand Me double <br/> several operation modes in order to control the compressor 7 and fan 5 a storage unit 11, the temperature sensor at the start of operation The storage unit 11 by the temperature data of 9
When one of the stored operation modes is selected and the operation starts
When operating for a while, the temperature data of the temperature sensor 9
Select one of the operation modes that you remembered
The judgment selection circuit 12 for instructing the operation in the operation mode is provided.
In the air conditioner, the determination / selection circuit 12 uses the temperature data of the temperature sensor 9 a plurality of times after the elapse of a certain time from the start of operation.
Selecting one of the operation modes by, when continued to select Japanese Teiun rolling mode continuously for a predetermined time, and wherein the instructing operation in this particular operating mode.

Further, the judgment selection circuit 12 disables switching between the cooling operation mode and the heating operation mode even if the temperature sensor 9 detects a large temperature change when changing the operation mode of the air conditioner. At the temperature where the operation mode in which the refrigerant flows backward cannot be changed and both cooling and heating can be selected, the operator's selection is prioritized.

[0009]

When the air conditioner is operated, the compressor 7 and the blower 5 are operated, and the heat exchanger 4 attached to the indoor frame 1
The refrigerant is sent to. Then, the temperature of the room air that is directed from the air suction port 2 to the heat exchanger 4 by the blower 5 is detected by the temperature sensor 9. For this reason, the temperature difference from the room temperature setting means 10 becomes clear, so that the fan 5 and the compressor 7 are controlled so that the room temperature matches the set temperature during the cooling / heating operation.

However, this control has different optimum operating conditions when the difference between the room temperature and the set temperature is small and when the difference is large. Therefore, when the temperature difference is large, the rotation speed of the blower 5 is large and rapid cooling is required. On the other hand, when the temperature difference is small, comfort is mainly required by dehumidification, and usually, fine operation to stabilize the room temperature is required, and the basic rotation speed of the blower 5 and the compressor 7 Various operation modes such as "quick cooling", "quick heating", "mild operation", "dehumidifying operation", etc., in which the accuracy of operation and control for the set temperature are variously set, are set manually by the operator. It was

The selection of this operation mode is considerably troublesome, and when this operation mode is automatically selected on the basis of the temperature data of the temperature sensor 9 and the room temperature setting means 10, the condition of the air-conditioned room is time. Since it changes with the passage of time, the optimum condition cannot always be maintained in the operation mode selected first, and the operation mode is reset again by the temperature data of the temperature sensor 9 and the room temperature setting means 10 after the operation for a certain time. It is a thing.

According to the present invention, when the operation mode is reset, the operation mode is selected from a plurality of operation modes stored in the storage unit 11 in advance, and the operation mode is not reset immediately after the elapse of a predetermined time, but is set for a predetermined time. The judgment selection circuit 12 changes the operation mode only when temperature data of a specific operation mode is continuously obtained during a predetermined time, and even if an unstable temperature is detected due to noise or the like. By ignoring this, the optimum operation mode is selected, and a comfortable indoor space can be obtained.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described with reference to the embodiments shown in the drawings. 1 is a frame mounted in an air-conditioned room, 2 is an air suction port provided in the frame, and 3 is air returned to the room after air conditioning. It is an air outlet. Reference numeral 4 is a heat exchanger mounted in the frame 1 in correspondence with the air intake 2, and 5 is a blower mounted in the frame 1 on the back surface of the heat exchanger 4 and having a discharge side continuous with the air outlet 3. A flap 13 for changing the blowing direction of the air is attached to the air outlet 3, and the flap 13 is controlled together with the blower 5.

In order to construct a separate type air conditioner, 14 is an outdoor unit frame installed outdoors, 6 is an outdoor heat exchanger installed in the outdoor unit frame 14, and 15 is an outdoor heat exchanger. A blower fan is attached to face 6 and a capillary 16 is attached to a refrigerant pipe 8 which communicates with the heat exchanger 4 near the outdoor heat exchanger 6.

Reference numeral 7 is a compressor installed in the outdoor unit frame 14, and 17 is a four-way valve attached to the discharge side of the compressor 7. By switching the four-way valve 17, the refrigerant pressurized by the compressor 7 is heated outside the room. It can be sent to the exchanger 6 to blow out cool air from the air outlet 3 of the frame 1, or to send the pressurized refrigerant to the heat exchanger 4 of the frame 1 to blow out hot air from the air outlet 3. it can.

Reference numeral 9 denotes a temperature sensor installed between the air suction port 2 and the heat exchanger 4 in the frame 1 installed indoors.
Is a room temperature setting means 10 attached to the frame 1, and an operation switch of the air conditioner, a manual / automatic changeover switch, and an operation mode changeover switch at the time of manual operation are provided in the vicinity of the operation part of the room temperature setting means 10. Is installed.

In the block diagram of FIG. 2, reference numeral 18 is a comparison circuit, 19 is a timing generation circuit incorporating a timer 19a, 11 is a storage section for operating mode data, 12 is a judgment selection circuit, and the comparison circuit 18 is a temperature sensor 9 And the temperature data of the room temperature setting means 10 are input, and the judgment selection circuit 12 determines the difference signal between the temperature data of both and the current room temperature data.
To enter.

When the operation switch of the air conditioner is operated,
The timing generation circuit 19 sends the first mode selection start signal to the judgment selection circuit 12 after 20 seconds of operation, and the judgment selection circuit 12 considers the difference signal of the temperature data sent from the comparison circuit 18 and the current room temperature. Then, the proper operation mode data is fetched from the operation mode data storage unit 11.

Reference numeral 20 denotes an air conditioner control circuit which receives the operation mode data output from the judgment selection circuit 12, and the air conditioner control circuit 20 determines, based on the appropriate operation mode data output from the judgment selection circuit 12, The blower 5, the compressor 7, the flap drive motor 13a, the four-way valve 17 and the like are controlled with reference to the temperature data of the comparison circuit 18. Therefore, when the difference between the room temperature data and the set temperature data is large, such as immediately after the start of the operation of the air conditioner, the blower 5 is strongly operated to perform the rapid cooling / heating operation in which the variation in the room temperature is large.

Then, when a certain period of time, for example, 40 minutes has elapsed during the operation in this operation mode, the timing generation circuit 19 again sends the mode selection start signal to the determination selection circuit 12. The judgment selection circuit 12 receives the temperature data from the comparison circuit 18 by this signal, takes in the proper operation mode data from the operation mode data storage unit 11 based on the temperature data, and the operation mode data is temporarily stored. The data is held in the data holding unit 12a of the judgment selection circuit 12.

The timing generation circuit 19 determines the mode selection start signal again when a predetermined time, for example, 20 minutes has elapsed since the last generation of the mode selection start signal.
To fetch new operation mode data based on the temperature data of the comparison circuit 18.

This new operating mode data is compared with the previous operating mode data held in the data holding section 12a, and when the same operating mode data is obtained as a result, the operating mode data is sent to the air conditioner control circuit 20 for air conditioning. The machine will continue to operate in this mode of operation. Further, when the comparison result shows different operation mode data, the operation mode of the air conditioner is not changed so that frequent changes of the operation mode do not occur.

When the predetermined time has elapsed and the comparison with the previous operation mode data is completed, the judgment selection circuit 12 clears the data in the data holding section 12a and returns it to the initial state.
The timing generation circuit 19 subsequently sends a mode selection start signal to the determination selection circuit 12 again after a certain period of time has elapsed, and repeatedly operates.

When the above operation is performed, the room temperature approaches the set temperature, and when the operation mode of the air conditioner is the cooling operation, the dehumidifying operation mode is set. Then, if this dehumidifying operation is continued for a long time, the room temperature becomes equal to or lower than the set temperature, and if the operation mode is automatically set, the heating operation is started, but in the present invention, from cooling to heating or from heating to cooling. Since the operation mode cannot be changed, the operation mode is not changed frequently, and the durability of the air conditioner is improved.

Further, in the above description, the operation mode data is taken in twice after the lapse of a certain time and after the lapse of a predetermined time, but the operation mode data may be taken in a plurality of times within the predetermined time. , For example, the data holding unit 1 of the judgment selection circuit 12
When the operation mode data is written in 2a, the determination selection circuit 12 automatically takes in the operation mode data by the temperature data of the comparison circuit 18 at a certain interval and compares it with the operation mode data of the data holding unit 12a. There is.

There is no problem when the operation mode data match, but when the comparison data is different, the next operation mode data is referred to. If the operation mode data is restored, it is suddenly caused by noise or the like. However, the operation mode data of the data holding unit 12a is not changed.

Further, it is different from the operation mode data of the data holding section 12a, and when it matches the next operation mode data to be referred to, it is clear that the operation mode change has occurred within a predetermined time, and the data holding section By rewriting 12a to data having no meaning different from the operation mode data, the operation mode of the air conditioner is not changed after a predetermined time has elapsed. Therefore, the operation mode is changed at least after a fixed time and a predetermined time for capturing the operation mode data, and the operation mode is prevented from frequently changing carelessly.

[0028]

As described above, according to the present invention, when the operation mode of the air conditioner is automatically determined based on the room temperature data and the set temperature data and the automatic operation is performed, the operation mode is changed after a predetermined time. The operation mode of the air conditioner automatically changes only when the operation modes are the same for the same time. For this reason, the driving mode does not change directly in response to the opening of the door when people enter and leave the room and various noises, and frequent changes in the driving mode do not occur, so comfortable driving has become possible. .

Frequently changing the operation mode is not preferable for the air conditioner and causes troubles, and conventionally, the operation mode detection interval has been lengthened. Since the detection interval can be shortened, the operation mode can be quickly changed according to changes in room temperature.

In particular, when the room temperature approaches the set temperature, cooling / warming is switched in the conventional automatic operation, but it is returned to the original state in most cases at the next detection, and it is frequent to do this. Is not good for In the present invention, the switching between cooling and warming is disabled and the dehumidifying operation is continued, for example, during cooling, so switching of the operation mode is eliminated and durability is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an air conditioner showing an embodiment of the present invention.

FIG. 2 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

1 frame 2 Air inlet 3 Air outlet 4 heat exchanger 5 blower 6 outdoor heat exchanger 7 compressor 8 refrigerant tubes 9 Temperature sensor 10 Room temperature setting means 11 Memory 12 Judgment selection circuit

Claims (2)

(57) [Claims] 1. A frame 1 mounted indoors, and an air inlet 2
And an air outlet 3, and a heat exchanger 4 that faces the inside of the air inlet 2 and a blower 5 whose discharge side is located at the air outlet 3 near the heat exchanger 4, and The outdoor heat exchanger 6, the compressor 7, and the heat exchanger 4 are connected to a refrigerant pipe 8
And contact the temperature sensor 9 near the heat exchanger 4,
The frame 1 is provided with a room temperature setting means 10, and the room temperature setting means 1
0 and the temperature data of the temperature sensor 9 causes the compressor 7
And controls the blower 5, a storage unit 11 which stores because multiple several operating modes of the rough or <br/> Ji for controlling the compressor 7 and fan 5, the temperature sensor 9 at the start of operation Storage unit according to temperature data
Select one of the operation modes stored in 11 and start operation
When operating for a certain period of time, the temperature data from the temperature sensor 9 is used again.
Select one of the operation modes stored in memory and select this
The judgment selection circuit 12 for instructing the operation in the specific operation mode
In providing air conditioner, the judgment selection circuit 12 is double the after the start of operation a predetermined time
Several operation modes depending on the temperature data of the temperature sensor 9
Select one of the, to select the special Teiun rolling mode continuously for a predetermined time
When continued to-option, it instructs the operation in this particular operation mode
Automatic operation device of an air conditioner, wherein the this. 2. The determination / selection circuit 12 cannot switch between the cooling operation mode and the heating operation mode even when the temperature sensor 9 detects a large temperature change when changing the operation mode of the air conditioner. The automatic operation device for an air conditioner according to claim 1.