JP2536317B2 - Air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner provided with a control unit for controlling the number of revolutions of a compressor according to a deviation between a set temperature and a detected room temperature and changing the set temperature after a predetermined time of operation.

[0002]

2. Description of the Related Art Conventionally, as this type of air conditioner, one having a so-called sleep function has been known. In this air conditioner, when the user presses the good night button at bedtime, the control unit raises the set temperature of the cooling operation at that time by, for example, 1 ° C. three times an hour, and finally the set temperature is higher than the initial set temperature. The cooling operation is performed at a set temperature higher by 3 ° C. for a predetermined time or until the morning.

[0003]

However, the above conventional air conditioner uniformly controls the temperature to be raised by 1 ° C. every 1 hour regardless of whether the detected room temperature is higher or lower than the outside air temperature or the set temperature. Since it is performed, even in a tropical night when the outside air temperature is high or when the detected temperature is considerably higher than the set temperature, the set temperature is raised, and there is a drawback that sufficient cooling cannot be obtained and the user feels sleepy. . However, if the cooling operation is continued at the initial set temperature without using the sleep function, the cooling becomes excessive before the dawn when the outside air temperature decreases, not only waste of electric power but also damage to the health of the user. On the other hand, during heating operation, you can press the sleep button to reduce the set temperature by 1 ° C every hour, but if the outside air temperature is too low or the detected room temperature is significantly lower than the set temperature, sufficient heating is not possible. It is not possible to obtain the same problem.

Therefore, an object of the present invention is to change the set temperature based on whether the outside air temperature or the detected room temperature is higher or lower than the set temperature during so-called "good night" operation, so that comfortable air conditioning suitable for the user's sense of temperature is performed. Another object of the present invention is to provide an air conditioner capable of saving energy.

[0005]

In order to achieve the above object, the air conditioner of the present invention is, as illustrated in FIG.
Deviation between the set temperature Ds and the temperature D detected by the room temperature sensor 6 |
A control unit 4 for controlling the number of revolutions of the compressor 9 according to Ds-D |, in which an outside air temperature sensor 8 for detecting an outside air temperature T and a timer means for receiving a timing command signal and measuring a predetermined time 4 and the outside air temperature judging means 4 for judging whether or not the temperature T detected by the outside air temperature sensor 8 is equal to or lower than a constant temperature T ₁ during the cooling operation when the timer means 4 finishes the time counting, and this outside air temperature judgment. When the means 4 determines that the temperature is positive, the temperature D detected by the room temperature sensor 6 is the set temperature Ds.
A room temperature discriminating means 4 for discriminating whether or not a predetermined temperature range H to L has been reached, and a set temperature changing means 4 for raising the set temperature Ds by a constant value when the room temperature discriminating means 4 discriminates affirmative. It is characterized by being provided. Also, during the heating operation, the outside air temperature determination means 4 of the air conditioner,
It is determined whether or not the detected temperature T of the outside air temperature sensor 8 is equal to or higher than a constant temperature T _2, and when the set temperature changing means 4 determines that the room temperature determining means 4 is positive, the set temperature Ds is lowered by a fixed value. You can also Further, the air conditioner may be provided with a repetitive processing means for outputting a timing command signal to the timer means 4 when the set temperature changing means 4 changes the set temperature Ds during the cooling or heating operation.

[0006]

In the air conditioner according to claim 1 during the cooling operation, when the user inputs a timing command signal at bedtime,
The timer means 4 starts measuring a predetermined time. When the timer means 4 has finished measuring the predetermined time, the outside air temperature determination means 4 detects that the temperature T detected by the outside air temperature sensor 8 is the constant temperature T.
_When it is determined to be affirmative here, the room temperature determination means 4 determines whether the temperature D detected by the room temperature sensor 6 has reached a predetermined temperature range H to L near the set temperature Ds. Determine. And if it is determined to be affirmative, the outside air temperature is low,
Moreover, since the detected room temperature is close to the set temperature, the set temperature changing means 4 raises the set temperature Ds by a certain value, considering that cooling may be weakened. As a result, the user does not feel too cold, wasteful cooling is eliminated, and energy is saved.
When the outside air temperature T exceeds the constant temperature T ₁ or when the detected room temperature D has not dropped to the predetermined temperature range H to L, the set temperature Ds is not changed and the first cooling operation is maintained.

In the air conditioner according to the third aspect of the present invention during the heating operation, when the user inputs a timing command signal at bedtime or the like, the timer means 4 starts counting a predetermined time. When the predetermined time of the time counting by the timer means 4 is completed, the outside air temperature determination means 4, the detected temperature T by the outside air temperature sensor 8, it is determined whether or not a predetermined temperature T ₂ or higher, where affirmative and if it is determined,
The room temperature determination means 4 determines whether or not the temperature D detected by the room temperature sensor 6 has reached a predetermined temperature range W to Z near the set temperature Ds. When it is determined that the answer is positive, the outside air temperature is high and the detected room temperature is close to the set temperature. Therefore, the set temperature changing unit 4 determines that the heating may be weakened, and the set temperature Ds is set.
Is lowered by a certain value. As a result, the user does not feel too hot, and wasteful heating is eliminated to save energy. Further, if the outside air temperature T is constant temperature T ₂ less than in the case or detection rt D is not raised to a predetermined temperature range W-Z, the set temperature Ds is not changed, the first heating operation is maintained.

Further, if the air conditioning apparatus of claim 1 or 3 is provided with the repetitive processing means 4, when the set temperature changing means 4 changes the set temperature Ds, the repetitive processing means 4 is provided.
Outputs a time-measurement command signal to the timer means 4, so that the series of processes described above, which starts when the timer means 4 starts measuring a predetermined time, is repeated. Therefore, after the elapse of a predetermined time, the set temperature Ds is a constant value only when the outside air temperature is above a certain temperature during the cooling operation, the outside air temperature is below a certain temperature during the heating operation, and the detected room temperature D is close to the set temperature Ds. Is raised and lowered. Therefore, it is possible to cope with a large fluctuation of the outside air temperature and the like, and it is possible to perform air conditioning that is more comfortable and has a large effect of saving energy.

[0009]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a schematic block diagram of a control circuit of an air conditioner, and this control circuit includes an indoor control unit 1 and an outdoor control unit 3 connected by a signal line 5. The indoor control unit 1 has a room temperature sensor 6 that detects a room temperature, and controls the rotation speed of an indoor fan motor 7 that allows indoor air to flow through the indoor heat exchanger under the control of an indoor microcomputer (microcomputer) 2. . Further, the outdoor control unit 3 has an outdoor air temperature sensor 8 for detecting an outdoor air temperature around the outdoor heat exchanger, and controls the rotation speeds of the compressor 9 and the outdoor fan motor 10 under the control of the outdoor microcomputer 4. .

The outdoor microcomputer 4, as a control unit, sends and receives a signal to and from the indoor microcomputer 2 via the signal line 5, and a deviation | Ds- between the set temperature Ds set by the user and the temperature D detected by the room temperature sensor 6. The compressor 9 and the indoor fan motor 7 are rotated at a rotation speed proportional to D |, and a timer means for performing a good night operation control, an outside air temperature determination means,
It plays the role of room temperature discriminating means, set temperature changing means, and repetitive processing means. Since the outdoor microcomputer 4 serves both as the means according to claim 1 under the cooling operation and the means according to claim 3 under the heating operation, the former will be described first. That is, the outdoor microcomputer 4 receives a timing command signal issued by the user pressing a sleep button (not shown) of the indoor control unit 1 (see S2 in FIG. 3), and causes the built-in timer to set a predetermined time (for example, 2). (Time) is started (see S3 in FIG. 3).

Further, the outdoor microcomputer 4 serves as an outside air temperature determining means during cooling, and when the above timer finishes measuring a predetermined time (see S5 in FIG. 3), the temperature T detected by the outside air temperature sensor 8 is a constant temperature T. _When it is determined whether or not it is ₁ (for example, 25 ° C.) or less (see S6 in FIG. 3) and when it is determined to be affirmative, the temperature D detected by the room temperature sensor 6 serves as a room temperature determination means and is within a predetermined temperature range near the set temperature Ds. Is determined (see S7 in FIG. 3). The predetermined temperature range is, for example, an H to L range of 21 ° C. to 26 ° C. when the set temperature Ds is 25 ° C. as shown in FIG. Further, when the outdoor microcomputer 4 determines that the detected temperature D has reached the predetermined temperature range, it raises the set temperature Ds by a constant value (for example, 1 ° C.) as the set temperature changing means (FIG. 3).
As a repetitive processing means, the self-timer issues a timekeeping command signal to cause the built-in timer to start counting the predetermined time only once again (see S10 in FIG. 3).

The operation of the air conditioner having the above structure during cooling will be described below with reference to FIG. The outdoor microcomputer 4
During the cooling operation, the number of repetitions N is initialized to zero in step S1. Next, when the user presses the sleep button of the indoor control unit 1 in step S2 to generate a timing command signal, the outdoor microcomputer 4 receives this signal and, in step S3, causes the built-in timer to set a predetermined time (2 (Time) is started, and 1 is added to the number of repetitions N in step S4. If it is determined in step S5 that the timer has finished counting, the process proceeds to step S6 and it is determined whether the temperature T detected by the outside air temperature sensor 8 is equal to or lower than a constant temperature T ₁ (25 ° C.). Then, if the detected temperature T exceeds the constant temperature T ₁ , the outside air temperature is considerably high, and therefore, in order to maintain the current cooling operation, the process proceeds to step S9 and the current set temperature Ds is maintained, while the constant temperature T ₁ is maintained. If the following, proceed to step S7. In step S7, it is determined whether the temperature D detected by the room temperature sensor 6 has reached a predetermined temperature range H to L (see FIG. 2) near the set temperature Ds (25 ° C.). If not, the process proceeds to step S9 to maintain the current set temperature Ds, assuming that the indoor heat load is large, while if it is reached, the outside air temperature is low and the room temperature is close to the set temperature.
In step S8, the set temperature Ds is increased by a constant value (1 ° C.). Succeedingly, in a step S10, it is determined that N is 1, so that the process returns to the step S3. Incidentally, step S
When the set temperature Ds is maintained at 9, the process also returns to step S3.

Therefore, the above steps S3 to S9 are repeated again, and after the next predetermined time elapses, that is, 4 hours after pressing the good night button, the outside air temperature T is below the constant temperature T ₁ and the detected room temperature is D. Is set temperature Ds (26 ° C when S8 is passed in the previous loop, 25 when S9 is passed)
Only when the temperature reaches the specified temperature range around
Is further increased by 1 ° C., otherwise, the set temperature Ds at that time is maintained, and the process is ended.

By the above operation, when the outside air temperature is low and the detection temperature is close to the set temperature, the user does not feel too cold because the cooling is weakened. Conversely, the outside air temperature is high or the detection room temperature is set. When it is separated from the temperature, the cooling capacity is maintained, so that it is possible to realize comfortable cooling that suits the user's sense of temperature without feeling too hot. Moreover, since unnecessary excess cooling is eliminated, the energy saving effect can be enhanced. In the above embodiment, not only when the set temperature is increased by 1 ° C., but also when the set temperature is maintained, a series of processes are repeated to watch, so that not only a large decrease in outside air temperature but also It is possible to cope with a sudden drop from the middle, and it is possible to perform cooling that is more comfortable and has a large energy saving effect.

4 and 5 are diagrams for explaining the operation of the outdoor microcomputer 4 as a timer means, an outside air temperature determining means, a room temperature determining means, a set temperature changing means, and a repeating processing means under heating operation. As will be understood by comparing FIG. 5 and FIG. 3, the processing contents of the outdoor microcomputer 4 are different from the contents described above.
₂ (for example, 5 ° C.) or more, and the set temperature Ds is lowered by a constant value (for example, 1 ° C.) in step S8, and as can be seen from FIGS. 4 and 2, the predetermined temperature in step S7. Only the areas are different, and the processes of other steps are the same. Therefore, only different points will be described. The predetermined temperature range in step S7 is set to the set temperature Ds during heating operation as shown in FIG. 4, for example.
Is 20 ° C., it is the W to Z region of 19 ° C. to 23 ° C.

The operation of the air conditioner having the above structure during heating will be described below with reference to FIG. The outdoor microcomputer 4
During the heating operation, the number of repetitions N is initialized to zero in step S1. Next, when the user presses the sleep button of the indoor control unit 1 in step S2 to generate a timekeeping command signal, the outdoor microcomputer 4 receives this signal and in step S3 causes the built-in timer to set a predetermined time (2 (Time) is started, and 1 is added to the number of repetitions N in step S4. If it is determined in step S5 that the timer has finished counting, the process proceeds to step S6 and it is determined whether the temperature T detected by the outside air temperature sensor 8 is equal to or higher than a constant temperature T ₂ (5 ° C.).
Then, if the detected temperature T is less than the predetermined temperature T _2, since the outside air temperature is considerably low to maintain the current heating operation, while maintaining the current set temperature Ds proceeds to step S9, if a constant temperature T ₂ above Go to step S7. In step S7, the temperature D detected by the room temperature sensor 6 is set to the set temperature Ds (2
It is determined whether or not a predetermined temperature range W to Z (see FIG. 4) near 0 ° C.) is reached. If not, the process proceeds to step S9 as if the heat load in the room is large, and the current set temperature Ds is maintained. On the other hand, if the set temperature Ds is reached, the outside air temperature is high and the room temperature is close to the set temperature. At, the set temperature Ds is lowered by a constant value (1 ° C). continue,
In step S10, it is determined that N is 1, and the process returns to step S3. In step S9, the set temperature Ds
Also, when is maintained, the process similarly returns to step S3.

[0017] Thus, repeated treatment of the above-described step S3~S9 again, four hours after the press following a predetermined time has elapsed after That night button, at ambient temperature T is constant temperature T ₂ above, and detected at room temperature D is Only when the temperature reaches a predetermined temperature range near the set temperature Ds (19 ° C. when S8 is passed in the previous loop, 20 ° C. when S9 is passed), further lower the set temperature Ds by 1 ° C., otherwise, at that point. Set temperature Ds
Is maintained, and the process ends.

By the above operation, when the outside air temperature is high and the detected temperature is close to the set temperature, the heating is weakened so that the user does not feel too hot. Conversely, the outside air temperature is low or the detected room temperature is set. When it is separated from the temperature, the heating capacity is maintained, so that it is possible to realize comfortable heating adapted to the user's sense of temperature without feeling too cold. In addition, since unnecessary excess heating is eliminated, the energy saving effect can be enhanced. In the above embodiment, not only when the set temperature is lowered by 1 ° C., but also when the set temperature is maintained, a series of processes are repeated to watch, so that not only a large rise in the outside air temperature, It is possible to cope with a sudden rise from the middle, and it is possible to perform more comfortable and energy-saving heating. Further, in the above embodiment, the number of repetitions by the repetition processing means is one, but it may be plural. Further, the air conditioner of the present invention can be applied not only at bedtime but also to cooling operation by a timer during the daytime.

[0019]

As is apparent from the above description, the air conditioner of the present invention is provided with a control unit for controlling the number of revolutions of the compressor according to the deviation between the set temperature and the temperature detected by the room temperature sensor. When the timer means receives a time-measurement command signal for a predetermined period of time, the outside-air temperature determination means determines whether or not the temperature detected by the outside-air temperature sensor is equal to or lower than a certain temperature during the cooling operation when the time measurement ends, and then this When the determination is affirmative, the room temperature determining means determines whether or not the temperature detected by the room temperature sensor has reached a predetermined range around the set temperature, and when the determination is affirmative, the set temperature changing means keeps the set temperature constant. Since the temperature is raised by just the value, the user does not feel too cold when the outside air temperature is low and the detected room temperature is close to the set temperature, because the cooling is weakened.
In other cases, the cooling capacity is maintained, the body does not feel too hot, and comfortable cooling suitable for the user's temperature sensation can be performed, and excess cooling can be eliminated to enhance the energy saving effect. Further, during the heating operation, the outside air temperature determining means of the air conditioner determines whether or not the detected outside air temperature is equal to or higher than a certain temperature, and when the determination is positive, the set temperature changing means keeps the set temperature constant. If the value is decreased by just the value, the user can comfortably heat the user's temperature sensation and the energy saving effect can be enhanced. Further, if any one of the above-mentioned air conditioners is provided with a repetitive processing means for outputting a timing command signal to the timer means when the set temperature changing means changes the set temperature, it is more comfortable to watch after the set temperature is changed. Thus, air conditioning with a great energy saving effect can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control circuit of an embodiment of an air conditioner of the present invention.

FIG. 2 is a diagram showing a method of determining a room temperature during cooling by the outdoor microcomputer of FIG.

FIG. 3 is a flowchart showing a flow of room temperature control during cooling by the outdoor microcomputer.

FIG. 4 is a diagram showing a method of determining a room temperature during heating by the outdoor microcomputer of FIG.

FIG. 5 is a flowchart showing a flow of room temperature control during heating by the outdoor microcomputer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Indoor control unit, 2 ... Indoor microcomputer, 3 ... Outdoor control unit, 4 ... Outdoor microcomputer, 5 ... Signal line, 6 ... Room temperature sensor, 8 ... Outside air temperature sensor, 9 ... Compressor.

Claims (4)

(57) [Claims] 1. A control unit (4) for controlling the rotational speed of a compressor (9) according to a deviation (| Ds-D |) between a set temperature (Ds) and a temperature (D) detected by a room temperature sensor (6). In an air conditioner equipped with, an outside air temperature sensor (8) for detecting an outside air temperature (T), a timer means (4) for receiving a time-keeping command signal to measure a predetermined time, and a timer means (4) for measuring the time. When the operation is finished, the outside air temperature judging means (4) for judging whether or not the temperature (T) detected by the outside air temperature sensor (8) is equal to or lower than a constant temperature (T ₁ ) during the cooling operation, and the outside air temperature judging means. A room temperature discriminating means for discriminating whether or not the temperature (D) detected by the room temperature sensor (6) has reached a predetermined temperature range (H to L) near the set temperature (Ds) when (4) is determined to be affirmative. (4) and when the room temperature discriminating means (4) discriminates the affirmative, An air conditioner comprising a set temperature changing means (4) for increasing a constant temperature (Ds) by a constant value. 2. A repetitive processing means (4) for outputting the timekeeping command signal to the timer means (4) when the set temperature changing means (4) raises the set temperature (Ds). Air conditioner. 3. A control unit (4) for controlling the rotation speed of the compressor (9) according to a deviation (| Ds-D |) between the set temperature (Ds) and the temperature (D) detected by the room temperature sensor (6). In an air conditioner equipped with, an outside air temperature sensor (8) for detecting an outside air temperature (T), a timer means (4) for receiving a time-keeping command signal to measure a predetermined time, and a timer means (4) for measuring the time. When the operation is finished, an outside air temperature judging means (4) for judging whether or not the temperature (T) detected by the outside air temperature sensor (8) is a constant temperature (T ₂ ) or more during heating operation, and the outside air temperature judging means. When (4) determines that the temperature is positive, it is determined whether or not the temperature (D) detected by the room temperature sensor (6) has reached a predetermined temperature range (W to Z) near the set temperature (Ds). (4) and when the room temperature discriminating means (4) discriminates the affirmative, An air conditioner comprising a set temperature changing means (4) for decreasing the constant temperature (Ds) by a constant value. 4. The repetitive processing means (4) for outputting the timekeeping command signal to the timer means (4) when the set temperature changing means (4) lowers the set temperature (Ds). Air conditioner.