JPH09126522A - Control method of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a difference between room temperature and air supply temperature by correcting an air supply temperature target value to an optimum one considering an operation mode and fresh air temperature, and determining compressor frequency in response to a difference between the foregoing optimum value and measured air supply temperature. SOLUTION: An air supply temperature target value is estimated and determined by an indoor control means 11 on the basis of a difference between a measured room temperature detected by a room temperature sensor 7 and a set room temperature detected by a room temperature set means to judge an air conditioning mode. Correction to an air supply temperature optimum value is performed considering outdoor temperature and an indoor operation mode, and operation frequency to a compressor 5 is determined in response to a difference between the corrected optimum value and measured air supply temperature detected by an air supply temperature sensor 8. Hereby, an extreme difference between the room temperature and the air supply temperature is prevented and displeasure of a user such as a chill feeling is prevented.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for controlling an air conditioner having a compressor whose operating frequency can be varied.

[0002]

2. Description of the Related Art In recent years, with the development of various sensors, control methods for air conditioners have been rapidly adapted to the demands of users, and temperature,
By controlling humidity, air flow, air cleanliness, etc., further comfort is pursued in the living space.

A conventional control method used in this type of air conditioner will be described with reference to FIG.

As shown in the figure, an indoor unit 103 having an air blower 101 for sending cold and warm air under the floor and an indoor control means 102, and a room temperature sensor 10 for sensing the indoor temperature.
4 is provided, an air supply temperature sensor 105 for detecting conditioned air sent from under the floor to the room is provided under the floor, and a compressor 106 and an outdoor control means 107 having a variable operating frequency are provided outside the room.
The outdoor unit 108 including the above is provided.

In the above configuration, the target air supply temperature is determined according to the deviation between the room temperature set by the indoor control means 102 and the room temperature measured by the room temperature sensor 104, and the target air supply temperature and the air supply temperature sensor 105 measure the target air supply temperature. The operating frequency of the compressor 106 was controlled according to the difference from the measured measured supply air temperature.

Further, Japanese Patent Laid-Open No. 270854/1992 proposes a control method in which the difference between the set room temperature and the supply air temperature is kept constant during the cooling operation.

Further, in Japanese Patent Laid-Open No. 6-50591,
In addition to the difference between the set room temperature and the measured room temperature, a control method has also been proposed in which the target air supply temperature is determined in consideration of the set wind speed and the type of indoor unit.

[0008]

In such a conventional control method for an air conditioner, the difference between the set room temperature and the measured room temperature is always maintained regardless of whether the outside air temperature changes depending on the season or whether the operation mode is cooling or heating. It is blown out indoors at the determined air supply temperature. For example, when cooling in winter when the outside temperature is low, the blown out cold air has the same situation as cooling in summer if the difference between the set room temperature and the measured room temperature is the same, and the user feels chilly. It was

Further, if the difference between the air supply temperature and the room temperature is suppressed to a constant value in order not to feel chills or warmth,
There was a problem that the time to reach the set room temperature was long.

SUMMARY OF THE INVENTION The first object of the present invention is to provide a method for controlling an air conditioner in which the supply air temperature is set without making an extreme temperature difference between the room temperature and the supply air temperature. To do.

A second object is to set an upper limit on the compressor frequency that determines the supply temperature of the conditioned air.

A third object is to detect the whereabouts of a person in the living room, preferentially supply air to a place where there is no person, and quickly perform air conditioning at a set room temperature.

[0013]

In order to achieve the above first object, the first method of the air conditioner control method of the present invention is to provide an air outlet provided under the floor of the room and an air inlet provided on the ceiling. An indoor unit that communicates with the indoor unit, an outdoor unit that includes a compressor that can change the operating frequency, a room temperature sensor that detects the indoor temperature, and an air supply that detects the temperature of the air supply air supplied from the indoor unit to the underfloor. A temperature sensor, an outdoor air temperature sensor for detecting an outdoor temperature, and an outdoor control means provided in the outdoor unit so as to control an operating frequency of a compressor provided in the outdoor unit by a signal from the outdoor air temperature sensor and the indoor unit. And indoor control means provided in the indoor unit so as to communicate signals with the outdoor control means according to signals from the room temperature sensor and the supply air temperature sensor, and the set room temperature. The target air supply temperature determined by the difference between the measured room temperature and the operating mode and the outside air temperature are taken into consideration, and the target air supply temperature target value is corrected to the optimum value, and further according to the difference between the optimum value and the measured air supply temperature. The method of determining the compressor frequency is used.

In order to achieve the second object, the second means is to obtain the required frequency Fr value required for the outdoor control means by the difference between the target value of the supply air temperature and the measured supply air temperature. It is a method to control the operation of the compressor by setting the limit according to the pattern.

Further, in order to achieve the third object, the third means is provided with a human body sensor for detecting a human body in a room in which the room is divided into a plurality of rooms, and an air volume adjusting means at the air outlet, so that there is a person in the living room. A method of controlling the air volume of conditioned air and supplying it by distinguishing between a section and a section without people.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, by the method of the above-mentioned first means, when it is necessary to cool a large heat load in the winter, it is in the cooling mode, but it is recognized that it is the winter. The air temperature target value can be suppressed below the normal value, and the degree of discomfort that the user is chilly can be reduced.

Further, according to the method of the second means, the upper limit of the compressor frequency is determined by finely controlling the Fr value, and the blowout temperature can be suppressed.

According to the method of the third means, a human body sensor detects a compartment and a compartment without a person, and the compartment without a person has a large air volume and the compartment with a person has a small air volume. The conditioned air is supplied in, and the air can be quickly conditioned to the set room temperature without causing discomfort to the user.

(First Embodiment) A first embodiment of the present invention will be described below with reference to FIG.

As shown in the figure, an indoor unit 4 is provided in communication with an air outlet 2 provided under the floor 1 in the room and an inlet 3a provided on the ceiling 3, and a compressor 5 capable of varying the operating frequency is provided outdoors. The provided outdoor unit 6 is provided, a room temperature sensor 7 for detecting the indoor temperature and an air supply temperature sensor 8 for detecting the temperature of the air supplied to the underfloor 1 from the indoor unit 4 are provided indoors, and the outdoor unit 6 is provided outdoors. Outdoor temperature sensor 9 for detecting the temperature outside the room
The outdoor unit 6 is provided with the outdoor control means 10 for controlling the operating frequency of the compressor 5 by the signals from the outdoor air temperature sensor 9 and the indoor unit 4, and the outdoor control is performed by the signals from the room temperature sensor 7 and the supply air temperature sensor 8. An indoor control means 11 for communicating a signal to the means 10 is provided in the indoor unit 4.

The control method in the above configuration will be described with reference to control steps. In step s1, the room temperature THst set by the room temperature setting means (not shown) and the measurements detected by the room temperature sensor 7 and the supply air temperature sensor 8 are measured. The room temperature THs, the measured supply air temperature Ts, and the measured outside air temperature TO from the outside air temperature sensor 9 via the outdoor control means 10 are recognized by the indoor control means 11, and in step s2, the indoor control means 11 measures the supply air temperature target value Tst. The supply air temperature target value Tst is determined by calculation based on the difference (THs-THst) between the room temperature THs and the set room temperature THst, and the cooling / heating mode is determined in step s3. Then, in step s4, the outdoor temperature and the indoor operation mode are taken into consideration to correct the supply air temperature optimum value Tst *, and in step s5, the outdoor air temperature is recognized in step s1 and the cooling / heating mode is recognized in step s3. The difference between the optimum supply air temperature Tst * and the measured supply air temperature Ts, that is, the supply air temperature difference ΔTs = Ts−Tst * is obtained.

Next, in step s6, the request frequency Fr value to the compressor 5 is determined, and in step s7, the request frequency Fr.
The value is converted into the compressor target frequency, and the compressor operating frequency is controlled in step s8.

As described above, according to the control method of the air conditioner of the first embodiment of the present invention, since the outdoor temperature and the indoor operation mode can be taken into consideration, the indoor heat load is reduced, for example, in winter when the outdoor temperature is low. When it becomes necessary to cool the air largely, it is in the cooling mode, but it is possible to keep the target value of the air supply temperature below the normal level by recognizing that it is winter, and the outlet temperature will be suitable for the season, making the user chilly. The degree of giving discomfort is limited.

The same applies to the middle season and summer. (Embodiment 2) Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

In the control steps shown in FIG.
The correction of the supply air temperature target value Tst in step s4 corresponds to the change in the outside air temperature and the operation mode. However, in the second embodiment, unlike this, it is assumed that the step of s4 is not performed.
The operation mode in each season is dealt with in steps 6 and s7. Here, the request frequency Fr value will be described. Regarding the supply air temperature difference ΔTs obtained in s5, there is no temperature difference, that is, ΔTs = 0 is Fr0, and when ΔTs is a certain value or more, the maximum value Fr50 of Fr is set. By dividing into 51 steps in this way, the algebra indicating the degree of the capacity requirement to the outdoor unit 6 is replaced. Returning to the control step here, the Fr value determined in step s6 is transmitted from the indoor control means 11 to the outdoor control means 10, and in step s7, the cooling / heating modes and the outdoor temperature stored in the outdoor control means 10 are transmitted. The target frequency is determined in the conversion table for converting the Fr value determined in the range of 1 to the compressor frequency, and the compressor operating frequency control in step s8 becomes possible.

As described above, according to the control method for the air conditioner of the second embodiment of the present invention, the upper limit of the compressor frequency is set by finely controlling and limiting the required frequency Fr by setting the algebra of the Fr value. Can be decided. Therefore, the blowing temperature can be suppressed, the air conditioning can be performed by the blowing temperature suitable for the season, and the user can be prevented from feeling uncomfortable such as being chilly.

In the present embodiment, the Fr value is divided into 51, but if the number of divisions is increased or the number of patterns in the conversion table of Fr value and frequency is increased, the action and effect thereof are increased.

Further, ΔT is used as a parameter for determining the Fr value.
If the time variation of s is also taken into consideration, finer control will be performed.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, a human body sensor 12 for detecting a person's whereabouts and an air volume adjusting means 13 are provided at an air outlet 2 of an underfloor 1 in a room divided into a plurality of rooms, and an indoor control means 11A.
And a blower 4a controlled by the indoor control means 11A is provided in the indoor unit 4.

With the above configuration, for example, a room is divided into a plurality of sections, and one human body sensor 12 and one air outlet 2 provided with the air volume adjusting means 13 are provided for each compartment, and a human body sensor 12 detects the presence of a person. The indoor control means 11 supplies a large amount of conditioned air from the blower 4a provided in the indoor unit 4 to the unoccupied section, and supplies a small amount of air to the unoccupied section. Control to supply with.

As described above, according to the control method of the air conditioner of the third embodiment of the present invention, the room is divided into a plurality of sections, and the human body sensor 12 senses the section with the person and the section without the person to adjust the air volume. By means of this method, the air with a small amount of air is supplied to the section with people and the large amount of air is supplied to the section without people. It does not take a long time for the living room to reach the set room temperature THst, and the desired set temperature can be reached quickly without giving the user a draft feeling.

[0033]

As is apparent from the above embodiments, according to the present invention, an indoor unit provided in communication with an air outlet provided under the floor in a room and an air inlet provided in a ceiling, and a compression capable of varying an operating frequency. An outdoor unit provided with a machine, a room temperature sensor for detecting an indoor temperature, an air supply temperature sensor for detecting a temperature of an air supply supplied from the indoor unit under the floor,
An outdoor air temperature sensor for detecting an outdoor temperature, an outdoor control means provided in the outdoor unit so as to control an operating frequency of a compressor provided in the outdoor unit by a signal from the outdoor air temperature sensor and the indoor unit, and the room temperature. The indoor control means provided in the indoor unit so as to communicate the signal with the outdoor control means by the signal of the sensor and the supply air temperature sensor, the supply air temperature target value determined by the difference between the set room temperature and the measured room temperature. Considering the operation mode and the outside air temperature, the target value of the supply air temperature is corrected to the optimum value and the compressor frequency is determined according to the difference between the optimum value and the measured supply air temperature. It is possible to provide a control device for an air conditioner that does not give a pleasant sensation.

Further, the operating frequency of the compressor is controlled by limiting the required frequency Fr value required of the outdoor control means by the difference between the target value of the supply air temperature and the measured supply air temperature, in a pattern depending on the outside air temperature and the operation mode. Therefore, the upper limit of the compressor is determined, and the blowout temperature can be suppressed.

Further, a human body sensor for detecting a human body and an air volume adjusting means at the air outlet are provided in a room in which the room is divided into a plurality of compartments, and the air volume of the air conditioner is discriminated by distinguishing a compartment with a person and a room without a person. Since it is controlled and supplied, the temperature in the living room can be quickly set to the set temperature without giving a draft feeling to the person in the living room.

[Brief description of the drawings]

FIG. 1A is a schematic diagram showing a control method for an air conditioner according to a first embodiment of the present invention. FIG. 1B is a control step diagram showing a control method for an air conditioner according to the first embodiment.

FIG. 2 is a control step diagram showing a control method of the air conditioner of the second embodiment.

FIG. 3 is a schematic diagram showing a control method of the air conditioner of the third embodiment.

FIG. 4 is a schematic diagram showing a control method of a conventional air conditioner.

[Explanation of symbols]

 1 Underfloor 2 Outlet 3 Ceiling 3a Suction Port 4 Indoor Unit 5 Compressor 6 Outdoor Unit 7 Room Temperature Sensor 8 Air Supply Temperature Sensor 9 Outdoor Air Temperature Sensor 10 Outdoor Control Means 11 Indoor Control Means 11A Indoor Control Means 12 Human Body Sensor 13 Air Volume Adjustment Means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuya Hori 6-61, Imafuku Nishi 6-chome, Joto-ku, Osaka City, Osaka Prefecture Matsushita Seiko Co., Ltd. No. 2 61 Matsushita Seiko Co., Ltd.

Claims (3)

[Claims] 1. An indoor unit provided in communication with an air outlet provided under the floor in the room and an inlet provided on the ceiling, an outdoor unit provided with a compressor capable of varying an operating frequency, and a room temperature for detecting an indoor temperature. A sensor, an air supply temperature sensor that detects the temperature of the air supply supplied from the indoor unit to the underfloor, an outdoor air temperature sensor that detects the outdoor temperature, and a signal from this outdoor air temperature sensor and the indoor unit An outdoor control means provided in the outdoor unit to control the operating frequency of the provided compressor, and an indoor unit provided to communicate with the outdoor control means by signals of the room temperature sensor and the supply air temperature sensor. The indoor air temperature control means is provided, and the air supply temperature target value determined by the difference between the set room temperature and the measured room temperature is set in consideration of the operation mode and the outside air temperature. Control method of an air conditioner that determines the compressor frequency in accordance with the difference to correct the value to the optimum value, yet the optimum value and the measured supply air temperature. 2. The operating frequency of the compressor is controlled by limiting the required frequency Fr value required for the outdoor control means by the difference between the target value of the supply air temperature and the measured supply air temperature by a pattern depending on the outside air temperature and the operation mode. The method for controlling an air conditioner according to claim 1. 3. A human body sensor for detecting a human body in a room divided into a plurality of rooms, and an air flow rate adjusting means at the air outlet are provided, and the air flow rate of the conditioned air is determined by distinguishing between a room with a person and a room without a person. The method for controlling an air conditioner according to claim 1, wherein the air conditioner is controlled and supplied.