JPH06147592A - Air conditioner - Google Patents

Abstract

PURPOSE:To prevent the generation of a dramatic change in room temperature when automatically switched over from cooling mode to heating mode and vice versa. CONSTITUTION:There are provided an operation control device 17 which controls the operation of an air conditioner under the control of the capacity of a compressor based on a setting temperature set with a room temperature setting apparatus 14 and a room temperature detected with a room temperature detector 15 and a temperature setting apparatus 18 which sets a specified temperature for the setting temperature in the operation control device 17 and a counter 21 which counts the number of halts of the compressor 6 after having switched over from heating mode to cooling mode and vice versa. Furthermore, the operation control device 17 controls both cooling and heating operations in automatic mode. At the same time when the operations are switched over from heating mode to cooling mode under the automatic operation control of cooling and heating, the setting room temperature is increased by a definite value until the number of compressor shutdowns reaches a specified value. When the operations are switched over from cooling mode to heating mode, the setting room temperature is lowered by a definite value until the compressor stop number reaches a specified value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for performing cooling / heating automatic operation control.

[0002]

2. Description of the Related Art As a conventional air conditioner for performing cooling / heating automatic operation control, there is, for example, one disclosed in Japanese Patent Laid-Open No. 60-20035.

An air conditioner for performing the conventional cooling / heating automatic operation control will be described below with reference to the drawings. Figure 1
Reference numeral 0 is a schematic configuration diagram showing a conventional air conditioner, and reference numeral 1 is an indoor unit main body having an indoor heat exchanger 2, an indoor blower 3, and an expansion mechanism 4 for cooling. Reference numeral 5 denotes an outdoor unit main body, which has a compressor 6, an outdoor heat exchanger 7, an outdoor blower 8, a heating expansion mechanism 9, and a four-way valve 10 that switches the flow of refrigerant between cooling and heating. . Further, the indoor unit body 1 is provided with an operation control device 12 that controls the operation of the indoor unit body 1 and the outdoor unit body 5.

Inside the air-conditioned room 13, a room temperature setting device 1 is provided.
4 and a room temperature adjuster 16 having a room temperature detector 15 are arranged to control the room temperature in the air-conditioned room 13 together with the operation control device 12.

The operation control device 12 includes a room temperature setting device 14
The cooling operation, the heating operation, and the blowing operation are automatically controlled based on the difference between the set room temperature T0 set in step 1 and the room temperature t detected by the room temperature detector 15.

The operation of the air conditioner configured as described above for performing the cooling / heating automatic operation control will be described below with reference to FIG.

When the system starts in the cooling / warming automatic operation, the room temperature detector 15 detects the room temperature t and compares it with the set room temperature T0. Room temperature t ≧ setting room temperature TO When in cooling mode, room temperature t <
When the set room temperature is T0, the operation starts in the heating mode (step 1).

In the heating mode, heating operation is performed, and the operation control device 12 operates at the set room temperature T0.
Heating stop temperature T1 (T0 ≦
T1), a cooling start temperature T2 (T1 ≦ T2) higher than the heating stop temperature T1 by a predetermined value, a cooling stop temperature T3 (T0 ≧ T3) lower than the set room temperature T0 by a predetermined value, and a cooling stop temperature T3.
Heating start temperature T4 (T3 ≧ T4) lower by a predetermined value
Are stored respectively (step 2), and when room temperature t ≧ heating stop temperature T1, the compressor 6 is stopped and switched to the blow operation (step 3).

After switching to the blowing operation, the compressor 6 is operated in the cooling mode when the room temperature t ≧ the cooling start temperature T2 and in the heating mode when the room temperature t ≦ the cooling stop temperature T3, and the cooling stop temperature T3 <the room temperature t. <When the cooling start temperature is T2, the blowing operation is maintained (step 4).

In the cooling mode, cooling is performed and the operation control device 12 is operated with respect to the set room temperature T0.
Is the heating stop temperature T1 (T
0 ≦ T1), a cooling start temperature T2 (T1 ≦ T2) higher than the heating stop temperature T1 by a predetermined value, a cooling stop temperature T3 (T0 ≧ T3) lower than the set room temperature T0 by a predetermined value, and a predetermined value lower than the cooling stop temperature T3. Heating start temperature T4 (T3 ≧ T
4) are stored respectively (step 5), and when room temperature t ≦ cooling stop temperature T3, the compressor 6 is stopped and the operation is switched to the blowing operation (step 6).

After switching to the blowing operation, the compressor 6 is operated in the heating mode when the room temperature t ≦ heating start temperature T4 and in the cooling mode when the room temperature t ≧ heating stop temperature T1 and the heating start temperature T4 <room temperature t. <When the heating stop temperature T1 is maintained, the blowing operation is maintained (step 7).

As described above, the cooling operation, the heating operation, and the blowing operation are automatically controlled according to the difference between the set room temperature T0 and the room temperature t, and the room temperature is always maintained at a constant value even if the indoor air conditioning load changes. .

[0013]

However, in the above-mentioned conventional configuration, when the heating mode is switched to the cooling mode, the cooling operation is started from the temperature T2 which is two steps higher than the set temperature T0, and the air conditioning load is switched to the heating mode. Therefore, there is a drawback that the room temperature is suddenly lowered to the cooling stop temperature T3, and the room temperature is suddenly changed, so that the comfort of the room is deteriorated.

Also, when the heating mode is switched to the cooling mode, the room temperature also changes rapidly, and the comfort of the room is impaired.

According to the present invention, the change of the air conditioning load in the room
When switching from the heating mode to the cooling mode or from the cooling mode to the heating mode operation, it is an object to avoid a sudden change in room temperature and maintain a comfortable indoor environment.

[0016]

In order to achieve the above object, the air conditioner of the present invention comprises a compressor having a variable capacity,
Operation control of the air conditioner based on the values of the room temperature setter that sets the room temperature, the room temperature detector that detects the room temperature, the set room temperature set by the room temperature setter, and the room temperature detected by the room temperature detector And an operation control device that operates.

The operation control device includes a temperature setter for internally setting a predetermined temperature with respect to the set room temperature, the number of times the compressor is stopped after switching from the cooling mode to the heating mode, and switching from the heating mode to the cooling mode. Equipped with a counter that counts the number of times the compressor is stopped afterward, during heating operation, the compressor function is increased when the room temperature is lower than the set room temperature, and the compression function is decreased when the room temperature is higher than the set room temperature. Then, the compressor is stopped at a heating stop temperature that is higher than the set room temperature by a specified value to start the air-blowing operation, and the cooling operation is started at a cooling start temperature that is a specified value higher than the heating stop temperature, and the room temperature is set during the cooling operation. Compressor capacity is increased as the temperature rises above room temperature and decreases as room temperature falls below the set room temperature. To stop the compressor at tufts stop temperature and air blowing operation, performs cooling and heating automatic driving control for starting the heating operation at a further predetermined value lower heating start temperature than the cooling stop temperature. Also, when the heating mode is switched to the cooling mode by the cooling / heating automatic operation control, when the number of compressor stops counting the set room temperature by the counter reaches a predetermined number, the temperature is raised to a certain temperature, and when the cooling mode is switched to the heating mode, The control is performed such that the set room temperature is lowered by a constant temperature until the number of times the compressor is stopped by the counter reaches a predetermined number.

In another air conditioner of the present invention, a variable capacity compressor, a room temperature setting device for setting the room temperature, a room temperature detector for detecting the room temperature, and a set room temperature set by the room temperature setting device. And the value of the room temperature detected by the room temperature detector,
And an operation control device for controlling the operation of the air conditioner.

The operation controller is provided with a temperature setter for internally setting a predetermined temperature with respect to the set room temperature, and a timer that operates after switching from cooling to heating and after switching from heating to cooling. During operation, the compressor capacity is controlled to increase the compression function force as the room temperature is lower than the set room temperature and decrease the compression function force as the room temperature is higher than the set room temperature. The machine is stopped and blown, and the cooling operation is started at a cooling start temperature higher by a predetermined value than the heating stop temperature,
During cooling operation, the compressor function is controlled to increase the compression function force when the room temperature is higher than the set room temperature and to decrease the compression function force when the room temperature is lower than the set room temperature. Stop the compressor and start blowing,
Cooling / heating automatic operation control is performed to start heating operation at a heating start temperature that is a predetermined value lower than the cooling stop temperature. In addition, if the heating / cooling automatic operation control switches the heating mode to the cooling mode, the set room temperature is raised for a predetermined period of time, and if the cooling mode is switched to the heating mode, the set room temperature is maintained for a predetermined period of time. Is configured to perform a constant temperature lowering control.

In another air conditioner of the present invention, a variable capacity compressor, a room temperature setting device for setting the room temperature, a room temperature detector for detecting the room temperature, and a set room temperature set by the room temperature setting device. And the value of the room temperature detected by the room temperature detector,
And an operation control device for controlling the operation of the air conditioner.

The operation controller is provided with a temperature setter for setting a predetermined temperature with respect to the set room temperature, and a timer that operates after switching from cooling to heating and after switching from heating to cooling. During operation, the compressor capacity is controlled to increase the compression function force as the room temperature is lower than the set room temperature and decrease the compression function force as the room temperature is higher than the set room temperature. The machine is stopped and blown, and the cooling operation is started at a cooling start temperature higher by a predetermined value than the heating stop temperature,
During cooling operation, the compressor function is controlled to increase the compression function force when the room temperature is higher than the set room temperature and to decrease the compression function force when the room temperature is lower than the set room temperature. Stop the compressor and start blowing,
Cooling / heating automatic operation control is performed to start heating operation at a heating start temperature that is a predetermined value lower than the cooling stop temperature. When the heating mode is switched to the cooling mode by the cooling / heating automatic operation control, the set room temperature is raised to a certain temperature and gradually returned to the original cooling stop temperature with the lapse of the timer, and the cooling mode is switched to the heating mode. In this case, the set room temperature is lowered by a certain temperature, and the control is gradually returned to the original heating stop temperature as the timer elapses.

[0022]

In the air conditioner of the present invention, when the heating mode is switched to the cooling mode, the cooling operation starts at the cooling start temperature that is two steps higher than the set temperature, and the air conditioning load is switched to the heating mode. Although the room temperature decreases, the conventional set room temperature is set to a constant high temperature until the number of times the compressor is stopped reaches a predetermined number of times, so the capacity control of the compressor works early against the decrease in room temperature to reduce the capacity. It is possible to prevent deterioration in comfort due to a rapid temperature change without causing a sudden decrease in room temperature.

Similarly, when the cooling mode is switched to the heating mode, the conventional set room temperature is lowered by a constant temperature until the number of times the compressor is stopped reaches a predetermined number.
The capacity control of the compressor works earlier in response to the rise in the room temperature, the capacity can be reduced, and the comfort level is prevented from being lowered due to the rapid temperature change without causing the rapid room temperature rise.

In another air conditioner of the present invention, when the heating mode is switched to the cooling mode, the set temperature is set to 2 ° C.
Since the air-conditioning load is such that the cooling operation starts from the step-higher cooling start temperature and the heating is switched from heating to room temperature, the room temperature drops sharply, but in order to raise the conventional set room temperature to a constant temperature for a predetermined time, The capacity control of the compressor works earlier with respect to the decrease in room temperature, the capacity can be reduced, and the comfort level is prevented from being deteriorated due to the rapid temperature change without causing the rapid room temperature decrease.

Similarly, even when the cooling mode is switched to the heating mode, the conventional set room temperature is kept at a constant low temperature for a predetermined time. The control works, the ability can be reduced, and the comfortable temperature is prevented from being lowered due to the rapid temperature change without causing the rapid room temperature rise.

In another air conditioner of the present invention, when the heating mode is switched to the cooling mode, the set temperature is set to 2 ° C.
Since the air-conditioning load is such that the cooling operation starts from the higher cooling start temperature and switches from heating to the higher temperature, the room temperature drops rapidly, but the conventional set room temperature is raised to a certain high temperature, and the timer gradually elapses. Since the temperature is returned to the original set room temperature, the capacity control of the compressor works early in response to a decrease in room temperature, and the capacity can be reduced, without causing a sudden decrease in room temperature and a decrease in comfort due to a sudden temperature change. To prevent.

Similarly, when the cooling mode is switched to the heating mode, the conventional set room temperature is lowered to a certain temperature, and the room temperature is gradually raised to the original set room temperature as the timer elapses. On the other hand, the capacity control of the compressor is activated earlier, the capacity can be reduced, and the comfort level is prevented from being lowered due to the rapid temperature change without causing the rapid room temperature rise.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An air conditioner according to an embodiment of the present invention will be described below with reference to the drawings. Parts having the same structures as those of the prior art will be designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a schematic block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of the air conditioner of the same embodiment, and FIG. 3 is a flow chart showing the operation of the air conditioner of the same embodiment.

In FIG. 1, reference numeral 1 denotes an indoor unit main body, which internally has an indoor heat exchanger 2, an indoor blower 3, and a cooling expansion mechanism 4.
have. Reference numeral 5 denotes an outdoor unit body, which internally has a variable capacity compressor 6a, an outdoor heat exchanger 7, an outdoor blower 8, a heating expansion mechanism 9, and a four-way valve 10 for switching the flow of refrigerant between cooling and heating. is doing. Further, the indoor unit body 1 is provided with an operation control device 17 that controls the operation of the indoor unit body 1 and the outdoor unit body 5.

Inside the air-conditioned room 13, a room temperature setting device 1 is provided.
4 and a room temperature adjuster 16 having a room temperature detector 15 are arranged to control the room temperature in the air-conditioned room 13 together with the operation controller 17.

The operation control device 17 includes a room temperature setting device 14
The cooling operation, the heating operation, and the blowing operation are automatically controlled based on the difference between the set room temperature T0 set in step 1 and the room temperature t detected by the room temperature detector 15.

In FIG. 2, reference numeral 17 denotes an operation control device for controlling the air conditioner of this embodiment, which is a heating stop temperature T1 determined by the set room temperature T0 set by the room temperature setting device 14,
Cooling start temperature T2, cooling stop temperature T3, heating start temperature T
4, the temperature setting device 18 for setting 4, the heating stop temperature T1, the cooling start temperature T2, the cooling stop temperature T3, and the heating start temperature T4.
And a temperature comparator 19 for comparing the room temperature t detected by the room temperature detector 4, an operation mode detector 20 for detecting the operation mode, and after switching from the cooling mode to the heating mode and from the heating mode to the cooling mode. The counter 21 that counts the number of times X the compressor 6a is stopped is built in.

The operation controller 17 controls the capacity of the compressor 6a via the outdoor unit controller 22 and switches between cooling and heating according to the comparison result of the temperature comparator 19 and the operation mode detected by the operation mode detector 20. While controlling the four-way valve 10 to be changed, when the heating mode is switched to the cooling mode, the number of times the compressor is stopped X counted by the counter 21 is counted.
For a predetermined number of times X1, set room temperature T0 to a constant temperature A
When the temperature is changed from the cooling mode to the heating mode, the number of compressor stop times counted by the counter 21 X
Until the temperature reaches the predetermined number of times X2
Change to lower only.

Next, a specific example of this operation will be described with reference to the flowchart of FIG. If you start in cooling / heating automatic operation,
The room temperature detector 15 detects the room temperature t and compares it with the set room temperature T0. When the room temperature t ≧ the set room temperature TO, the operation starts in the cooling mode, and when the room temperature t <the set room temperature T0, the operation starts in the heating mode (step 11).

In the heating mode, the heating operation is performed, and the operation controller 17 sets the heating stop temperature T1 (T0≤T0) higher than the set room temperature T0 by a predetermined value.
1), a cooling start temperature T2 (T1 ≦ T2) higher by a predetermined value than the heating stop temperature T1, a cooling stop temperature T3 (T0 ≧ T3) lower by a predetermined value than the set room temperature T0, and a heating start lower by a predetermined value than the cooling stop temperature T3 The temperature T4 (T3 ≧ T4) is set by the temperature setter 18 (step 1).
2).

Next, the counter 21 is operated, and the counted number of times the compressor has stopped X is the number of times of stop X <the predetermined number of times X2.
In the case of, the set temperature correction temperature T0 ′ (T0 ′ = T1−B) corrected to lower the set room temperature T0 by the constant temperature B is set, and the set temperature T0 is corrected, whereby the heating stop temperature T1, Cooling start temperature T2, cooling stop temperature T
3. The heating start temperature T4 is also corrected to be lowered by the constant temperature B (heating stop temperature correction temperature T1 ′, cooling start temperature correction temperature T2 ′, cooling stop temperature correction temperature T3 ′, heating start temperature correction temperature T4 ′). As shown in Table 1, the operating frequency of the compressor 6a is determined based on the corrected relationship between the temperature and the room temperature t, and the capacity control is performed.

[0038]

[Table 1]

Next, room temperature t ≧ heating stop temperature correction temperature T1 ′
In the case of, the compressor 6a is stopped and switched to the blowing operation (step 13).

After switching to the blowing operation, if the room temperature t ≧ cooling start temperature correction temperature T2 ′, the cooling mode is set, and the room temperature t ≦
In the case of the cooling stop temperature correction temperature T3 ′, the compressor 6a is operated in the heating mode, and the cooling stop temperature correction temperature T3 ′ <room temperature t
<If the cooling start temperature is the corrected temperature T2 ′, the blowing operation is maintained (step 14).

In the cooling mode, the cooling operation is performed and the operation control device 1 is operated with respect to the set room temperature T0.
7 is a heating stop temperature T1 higher than the set room temperature T0 by a predetermined value.
(T0 ≦ T1), cooling start temperature T2 (T1 ≦ T2) higher than the heating stop temperature T1 by a predetermined value, cooling stop temperature T3 lower than the set room temperature T0 by a predetermined value (T0 ≧ T3), and a predetermined value higher than the cooling stop temperature T3 Low heating start temperature T4 (T3
≧ T4) is set by the temperature setter 18 (step 15).

Next, the counter 21 is operated, and the counted number of times the compressor has stopped X is the number of times of stop X <the predetermined number of times X1.
In case of, the set temperature correction temperature T0 ″ (T0 ”= T0 + A) is set so that the set room temperature T0 is increased by a constant temperature A, and the set temperature T0 is corrected, so that the heating stop temperature T1 and the cooling start are automatically performed. Temperature T2, cooling stop temperature T
3. The heating start temperature T4 is also corrected to be increased by the constant temperature A (heating stop temperature correction temperature T1 ″, cooling start temperature correction temperature T2 ″, cooling stop temperature correction temperature T3 ″, heating start temperature correction temperature T4 ″). Based on the corrected relationship between the temperature and the room temperature t, the operating frequency of the compressor 6a is determined and capacity control is performed as shown in (Table 2).

[0043]

[Table 2]

Next, room temperature t ≦ cooling stop temperature correction temperature T3 ″
In the case of, the compressor 6a is stopped and switched to the blowing operation (step 16).

After switching to the blowing operation, if the room temperature t ≦ heating start temperature correction temperature T4 ″, the room temperature t ≧ the heating mode.
When the heating stop temperature correction temperature T1 ", the compressor 6a is operated in the cooling mode, and the heating start temperature correction temperature T4"<room temperature t
If the heating stop temperature correction temperature T1 ", the blow operation is maintained (step 17).

As described above, the cooling operation, the heating operation, and the blowing operation are automatically controlled according to the difference between the set room temperature T0 and the room temperature t, and the compression functional force is increased as the room temperature is lower than the set room temperature during the heating operation. A compressor that increases the compression function force when the room temperature is higher than the set room temperature and decreases the compression function force when the room temperature is higher than the set room temperature and decreases the compression function force when the room temperature is lower than the set room temperature during the cooling operation. When the heating mode is switched to the cooling mode next, the cooling start temperature T2 which is two steps higher than the set temperature T0 is performed.
Since the air-conditioning load is such that the cooling operation is started and the air conditioner is switched from heating to room temperature, the room temperature drops sharply. However, until the compressor stop count X reaches the predetermined count X1, the conventional set room temperature T0
Since the temperature of the compressor 6a is increased by a constant temperature A, the capacity of the compressor 6a can be controlled earlier even if the room temperature decreases, and the capacity can be reduced, and the comfort due to the rapid temperature change can be prevented without causing a rapid temperature decrease. It is possible to prevent deterioration of sex.

Similarly, when the cooling mode is switched to the heating mode, the number of times X of stopping the compressor is the predetermined number of times X2.
Since the conventional set room temperature T0 is set to a temperature lower by the constant temperature B until the temperature reaches 0, the capacity control of the compressor 6a works earlier as the room temperature rises, the capacity can be reduced, and a rapid room temperature rise occurs. It is possible to prevent deterioration in comfort due to sudden temperature changes.

Hereinafter, another embodiment of the air conditioner according to the present invention will be described with reference to the drawings. The parts having the same structures as those of the related art will be designated by the same reference numerals, and the detailed description thereof will be omitted.

FIG. 4 is a schematic block diagram of an embodiment of the present invention, FIG. 5 is a block diagram of the air conditioner of the same embodiment, and FIG. 6 is a flow chart showing the operation of the air conditioner of the same embodiment.

In FIG. 4, reference numeral 1 denotes an indoor unit main body, which internally has an indoor heat exchanger 2, an indoor blower 3, and an expansion mechanism 4 for cooling.
have. Reference numeral 5 denotes an outdoor unit body, which internally has a variable capacity compressor 6a, an outdoor heat exchanger 7, an outdoor blower 8, a heating expansion mechanism 9, and a four-way valve 10 for switching the flow of refrigerant between cooling and heating. is doing. Further, the indoor unit body 1 is equipped with an operation control device 23 that controls the operation of the indoor unit body 1 and the outdoor unit body 5.

Inside the air-conditioned room 13, a room temperature setting device 1 is provided.
4 and a room temperature adjuster 16 having a room temperature detector 15 are arranged to control the room temperature in the air-conditioned room 13 together with the operation controller 23.

The operation control device 23 includes the room temperature setting device 14
The cooling operation, the heating operation, and the blowing operation are automatically controlled based on the difference between the set room temperature T0 set in step 1 and the room temperature t detected by the room temperature detector 15.

In FIG. 5, reference numeral 23 denotes an operation control device for controlling the air conditioner of this embodiment, which is a heating stop temperature T1 determined by the set room temperature T0 set by the room temperature setting device 14,
Cooling start temperature T2, cooling stop temperature T3, heating start temperature T
4, a temperature setting device 24 for setting 4, a heating stop temperature T1, a cooling start temperature T2, a cooling stop temperature T3, and a heating start temperature T4.
And a temperature comparator 25 for comparing the room temperature t detected by the room temperature detector 4, an operation mode detector 26 for detecting the operation mode, and a switching from the cooling mode to the heating mode and from the heating mode to the cooling mode. It has a built-in timer 27 that operates.

The operation controller 23 controls the capacity of the compressor 6a via the outdoor unit controller 28 and switches between cooling and heating according to the comparison result of the temperature comparator 25 and the operation mode detected by the operation mode detector 26. While controlling the four-way valve 10 to be changed, when the heating mode is switched to the cooling mode, the timer 27 operates and raises the set room temperature T0 by the constant temperature A until a predetermined time elapses in the timer 27,
When the cooling mode is switched to the heating mode, the timer 27 operates, and the set room temperature T0 is changed so as to be lowered by the constant temperature B until the predetermined time elapses in the timer 27.

Next, a specific example of this operation will be described with reference to the flowchart of FIG. If you start in cooling / heating automatic operation,
The room temperature detector 15 detects the room temperature t and compares it with the set room temperature T0. When the room temperature t ≧ the set room temperature TO, the operation starts in the cooling mode, and when the room temperature t <the set room temperature T0, the operation starts in the heating mode (step 21).

In the heating mode, the heating operation is performed, and the operation controller 23 sets the heating stop temperature T1 (T0≤T) higher than the set room temperature T0 by a predetermined value.
1), a cooling start temperature T2 (T1 ≦ T2) higher by a predetermined value than the heating stop temperature T1, a cooling stop temperature T3 (T0 ≧ T3) lower by a predetermined value than the set room temperature T0, and a heating start lower by a predetermined value than the cooling stop temperature T3 The temperature T4 (T3 ≧ T4) is set by the temperature setter 24 (step 2).
2).

Next, the set temperature correction temperature T corrected so that the set room temperature T0 is lowered by the constant temperature B until the timer 27 operates and the predetermined time elapses by the timer 27.
By setting 0 '(T0' = T1-B) and correcting the set temperature T0, the heating stop temperature T1, the cooling start temperature T2, the cooling stop temperature T3, and the heating start temperature T4 are also constant temperature B. The temperature is corrected to be lowered (heating stop temperature correction temperature T1 ′, cooling start temperature correction temperature T2 ′, cooling stop temperature correction temperature T3 ′, heating start temperature correction temperature T4 ′). As shown in Table 1, the operating frequency of the compressor 6a is determined based on the corrected relationship between the temperature and the room temperature t, and the capacity control is performed.

Next, room temperature t ≧ heating stop temperature correction temperature T1 ′
In this case, the compressor 6a is stopped and the air blow is switched (step 23).

After switching to the blowing operation, if the room temperature t ≧ cooling start temperature correction temperature T2 ′, the room temperature t ≦
In the case of the cooling stop temperature correction temperature T3 ′, the compressor 6a is operated in the heating mode, and the cooling stop temperature correction temperature T3 ′ <room temperature t
<In case of the cooling start temperature correction temperature T2 ′, the blowing operation is maintained (step 24).

In the cooling mode, the cooling operation is performed and the operation control device 2 is operated with respect to the set room temperature T0.
3 is a heating stop temperature T1 higher than the set room temperature T0 by a predetermined value.
(T0 ≦ T1), cooling start temperature T2 (T1 ≦ T2) higher than the heating stop temperature T1 by a predetermined value, cooling stop temperature T3 lower than the set room temperature T0 by a predetermined value (T0 ≧ T3), and a predetermined value higher than the cooling stop temperature T3 Low heating start temperature T4 (T3
≧ T4) is set by the temperature setter 24 (step 25).

Next, the set temperature correction temperature T corrected so that the set room temperature T0 is raised by the constant temperature A until the timer 27 operates and the predetermined time elapses by the timer 27.
By setting 0 ”(T0” = T0 + A) and correcting the set temperature T0, the heating stop temperature T1, the cooling start temperature T2, the cooling stop temperature T3, and the heating start temperature T4 are automatically increased by the constant temperature A. It is corrected (heating stop temperature correction temperature T1 ″, cooling start temperature correction temperature T2 ″, cooling stop temperature correction temperature T3 ″, heating start temperature correction temperature T4 ″). Based on the corrected relationship between the temperature and the room temperature t, the operating frequency of the compressor 6a is determined and capacity control is performed as shown in (Table 2).

Next, room temperature t ≦ cooling stop temperature correction temperature T3 ″
In the case of, the compressor 6a is stopped and switched to the blowing operation (step 26).

After switching to the blowing operation, if the room temperature t ≦ heating start temperature correction temperature T4 ″, the room temperature t ≧ the heating mode.
When the heating stop temperature correction temperature T1 ", the compressor 6a is operated in the cooling mode, and the heating start temperature correction temperature T4"<room temperature t
If the heating stop temperature correction temperature T1 ", the air blowing operation is maintained (step 27).

As described above, the cooling operation, the heating operation, and the blowing operation are automatically controlled according to the difference between the set room temperature T0 and the room temperature t, and the compression function is increased as the room temperature is lower than the set room temperature during the heating operation. A compressor that increases the compression function force when the room temperature is higher than the set room temperature and decreases the compression function force when the room temperature is higher than the set room temperature and decreases the compression function force when the room temperature is lower than the set room temperature during the cooling operation. When the capacity control of 6a is performed and then the heating mode is switched to the cooling mode, the cooling operation starts from the cooling start temperature T2 which is two steps higher than the set temperature T0, and the air-conditioning load is switched to the heating mode. Although the room temperature lowers, the conventional set room temperature T0 is raised to a constant temperature A higher for a predetermined time. Therefore, the capacity control of the compressor 6a works earlier with respect to the lowering of the room temperature. Can be reduced, it is possible to prevent deterioration of comfort due without sudden change in temperature caused a rapid room temperature reduction.

Similarly, when the cooling mode is switched to the heating mode, the conventional set room temperature T0 is lowered by the constant temperature B only for a predetermined time. The ability control of 6a works to reduce the ability, and it is possible to prevent a decrease in comfort due to a sudden temperature change without causing a sudden rise in room temperature.

Hereinafter, another embodiment of the air conditioner according to the present invention will be described with reference to the drawings. The parts having the same structures as those of the prior art will be designated by the same reference numerals, and the detailed description thereof will be omitted.

FIG. 7 is a schematic block diagram of an embodiment of the present invention, FIG. 8 is a block diagram of the air conditioner of the same embodiment, and FIG. 9 is a flow chart showing the operation of the air conditioner of the same embodiment.

In FIG. 7, reference numeral 1 denotes an indoor unit main body, which internally has an indoor heat exchanger 2, an indoor blower 3, and a cooling expansion mechanism 4.
have. Reference numeral 5 denotes an outdoor unit body, which internally has a variable capacity compressor 6a, an outdoor heat exchanger 7, an outdoor blower 8, a heating expansion mechanism 9, and a four-way valve 10 for switching the flow of refrigerant between cooling and heating. is doing. Further, the indoor unit body 1 is provided with an operation control device 29 for controlling the operation of the indoor unit body 1 and the outdoor unit body 5.

Inside the air-conditioned room 13, the room temperature setting device 1 is provided.
4 and a room temperature adjuster 16 having a room temperature detector 15 are arranged to control the room temperature in the air-conditioned room 13 together with the operation controller 29.

The operation control device 29 includes the room temperature setting device 14
The cooling operation, the heating operation, and the blowing operation are automatically controlled based on the difference between the set room temperature T0 set in step 1 and the room temperature t detected by the room temperature detector 15.

In FIG. 8, 29 is an operation control device for controlling the air conditioner of the present embodiment, which is a heating stop temperature T1 determined by the set room temperature T0 set by the room temperature setting device 14,
Cooling start temperature T2, cooling stop temperature T3, heating start temperature T
4, the temperature setting device 30 for setting 4, the heating stop temperature T1, the cooling start temperature T2, the cooling stop temperature T3, and the heating start temperature T4.
And a temperature comparator 31 for comparing the room temperature t detected by the room temperature detector 4, an operation mode detector 32 for detecting an operation mode, and a switching from a cooling mode to a heating mode and from a heating mode to a cooling mode. It incorporates a timer 33 that operates.

The operation control device 29 switches the capacity control of the compressor 6a and the cooling and heating via the outdoor unit controller 34 according to the comparison result of the temperature comparator 31 and the operation mode detected by the operation mode detector 32. The four-way valve 10 to be changed is controlled, and when the heating mode is switched to the cooling mode, the timer 33 is operated and the set room temperature T0 is set.
Is raised by a constant temperature A, and when the cooling mode is switched to the heating mode, the timer 33 is operated and
The set room temperature T0 is changed so as to be lowered by a constant temperature B.

Next, a specific example of this operation will be described with reference to the flowchart of FIG. If you start in cooling / heating automatic operation,
The room temperature detector 15 detects the room temperature t and compares it with the set room temperature T0. When the room temperature t ≧ the set room temperature TO, the operation starts in the cooling mode, and when the room temperature t <the set room temperature T0, the operation starts in the heating mode (step 31).

In the heating mode, the heating operation is performed, and the operation controller 29 sets the heating stop temperature T1 (T0≤T) higher than the set room temperature T0 by a predetermined value.
1), a cooling start temperature T2 (T1 ≦ T2) higher by a predetermined value than the heating stop temperature T1, a cooling stop temperature T3 (T0 ≧ T3) lower by a predetermined value than the set room temperature T0, and a heating start lower by a predetermined value than the cooling stop temperature T3 The temperature T4 (T3 ≧ T4) is set by the temperature setter 30 (step 3).
2).

Next, when the timer 33 operates, the set room temperature T0 is lowered by the constant temperature B, and the set room temperature T0 is gradually raised with the elapsed time C1 of the timer 33.
When the timer 33 has passed the predetermined time C0, the set temperature correction temperature T0 '(T
By setting 0 ′ = T1− (C0−C1) ÷ C0 × B) and correcting the set temperature T0, the heating stop temperature T1, the cooling start temperature T2, the cooling stop temperature T3, and the heating start temperature T4 are automatically set. Is also corrected to be lowered by a constant temperature B (heating stop temperature correction temperature T1 ′, cooling start temperature correction temperature T
2 ', cooling stop temperature correction temperature T3', heating start temperature correction temperature T4 '). As shown in Table 1, the operating frequency of the compressor 6a is determined based on the corrected relationship between the temperature and the room temperature t, and the capacity control is performed.

Next, room temperature t ≧ heating stop temperature correction temperature T1 ′
In the case of, the compressor 6a is stopped and switched to the blowing operation (step 33).

After switching to the blowing operation, if the room temperature t ≧ cooling start temperature correction temperature T2 ′, the cooling mode is set to the room temperature t ≦
In the case of the cooling stop temperature correction temperature T3 ′, the compressor 6a is operated in the heating mode, and the cooling stop temperature correction temperature T3 ′ <room temperature t
<If the cooling start temperature correction temperature T2 ′, the blowing operation is maintained (step 34).

In the cooling mode, the cooling operation is performed and the operation control device 2 is operated with respect to the set room temperature T0.
9 is a heating stop temperature T1 higher than the set room temperature T0 by a predetermined value.
(T0 ≦ T1), cooling start temperature T2 (T1 ≦ T2) higher than the heating stop temperature T1 by a predetermined value, cooling stop temperature T3 lower than the set room temperature T0 by a predetermined value (T0 ≧ T3), and a predetermined value higher than the cooling stop temperature T3 Low heating start temperature T4 (T3
≧ T4) is set by the temperature setter 30 (step 35).

Next, when the timer 33 operates, the set room temperature T0 is raised by a constant temperature A, and the set room temperature T0 is gradually lowered with the elapsed time C1 of the timer 33.
When the timer 33 has passed a predetermined time C0, the set temperature correction temperature T0 ″ (T
By setting 0 ″ = T1 + (C0−C1) ÷ C0 × A) and correcting the set room temperature T0, the heating stop temperature T1, the cooling start temperature T2, the cooling stop temperature T3, and the heating start temperature T4 are also automatically set. The temperature is corrected to be raised by a constant temperature A (heating stop temperature correction temperature T1 ″, cooling start temperature correction temperature T
2 ", cooling stop temperature correction temperature T3", heating start temperature correction temperature T4 "). As shown in (Table 2), the operating frequency of the compressor 6a is determined based on the relationship between the corrected temperature and the room temperature t. Take control.

Next, room temperature t ≦ cooling stop temperature correction temperature T3 ″
In the case of, the compressor 6a is stopped and switched to the blowing operation (step 36).

After switching to the blowing operation, if the room temperature t ≦ heating start temperature correction temperature T4 ″, the heating mode is set, and the room temperature t ≧
When the heating stop temperature correction temperature T1 ", the compressor 6a is operated in the cooling mode, and the heating start temperature correction temperature T4"<room temperature t
If it is the heating stop temperature correction temperature T1 ", the blowing operation is maintained (step 37).

As described above, the cooling operation, the heating operation, and the blowing operation are automatically controlled according to the difference between the set room temperature T0 and the room temperature t, and the compression functional force is increased as the room temperature is lower than the set room temperature during the heating operation. A compressor that increases the compression function force when the room temperature is higher than the set room temperature and decreases the compression function force when the room temperature is higher than the set room temperature and decreases the compression function force when the room temperature is lower than the set room temperature during the cooling operation. When the heating mode is switched to the cooling mode next, the cooling start temperature T2 which is two steps higher than the set temperature T0 is performed.
The air-conditioning load is such that the cooling operation starts and the air-conditioning load switches from heating to heating, so the room temperature drops rapidly, but the conventional set room temperature T0 is set to a constant temperature A higher temperature, and the original temperature gradually increases with the elapsed time of the timer 33. By returning the temperature to the set room temperature T0, the capacity control of the compressor 6a works early against the decrease of the room temperature, the capacity can be reduced, and the comfort due to the abrupt temperature change can be achieved without causing the abrupt temperature decrease. It can prevent the deterioration.

Similarly, when the cooling mode is switched to the heating mode, the conventional set room temperature T0 is set to the constant temperature B.
Then, by gradually returning to the original set room temperature T0 with the lapse of time of the timer 33, the capacity control of the compressor 6a works earlier with respect to the rise of the room temperature, the capacity can be reduced, and the rapid room temperature rise. It is possible to prevent a decrease in comfort due to a sudden temperature change without causing a problem.

[0084]

As described above, according to the air conditioner of the present invention, the cooling operation, the heating operation, and the blowing operation are automatically controlled according to the difference between the set room temperature and the room temperature, and the room temperature is set to the room temperature during the heating operation. The lower the room temperature is higher than the set room temperature, the higher the room temperature is higher than the set room temperature.The lower the room temperature is, the higher the room temperature is higher than the room temperature. When the compressor capacity control is performed to reduce the functioning power, and then the heating mode is switched to the cooling mode, the cooling operation starts from the cooling start temperature that is 2 steps higher than the set temperature, and the air conditioning load is about to switch from heating. Therefore, the room temperature drops rapidly, but by increasing the conventional set room temperature by a certain temperature until the number of times the compressor is stopped reaches a predetermined number, the Force acts control, since gradually decreases without abrupt room temperature reduction, there is no discomfort due to rapid change in room temperature, there is an effect that it is possible to maintain a comfortable indoor environment.

Similarly, when the operation is switched from the cooling mode to the heating mode operation, the conventional set room temperature is kept at a constant low temperature until the number of times the compressor is stopped reaches a predetermined number. Since the capacity control of the compressor works early and the temperature rises gradually without a sudden rise in room temperature, there is an effect that there is no discomfort due to a sudden change in room temperature and a comfortable indoor environment can be maintained.

Further, another air conditioner of the present invention automatically controls the cooling operation, the heating operation and the blowing operation depending on the difference between the set room temperature and the room temperature, and the room temperature is lower than the set room temperature during the heating operation. As the room temperature is higher than the set room temperature, the compression function is decreased, and when the room temperature is higher than the set room temperature, the compression function is increased, and as the room temperature is lower than the set room temperature, the compression function is increased. The capacity of the compressor is reduced, and when the heating mode is switched to the cooling mode next time, the cooling operation starts from the cooling start temperature that is 2 steps higher than the set temperature, and the air conditioning load is the level that switches from heating. Although the room temperature suddenly drops, the capacity of the compressor will be controlled earlier as soon as the room temperature drops by raising the conventional set room temperature to a certain higher temperature for a certain period of time. Because gradually decreases without reduction, without discomfort due to rapid change in room temperature, there is an effect that it is possible to maintain a comfortable indoor environment.

Similarly, when the cooling mode is switched to the heating mode, the conventional set room temperature is kept at a constant lower temperature for a predetermined period of time, so that the capacity of the compressor can be increased earlier even if the room temperature rises. Since the control works and the temperature gradually rises without a sudden temperature rise, there is an effect that a comfortable indoor environment can be maintained without any discomfort due to a sudden room temperature change.

Another air conditioner of the present invention automatically controls the cooling operation, the heating operation, and the blowing operation based on the difference between the set room temperature and the room temperature, and the room temperature is lower than the set room temperature during the heating operation. As the room temperature is higher than the set room temperature, the compression function is decreased, and when the room temperature is higher than the set room temperature, the compression function is increased, and as the room temperature is lower than the set room temperature, the compression function is increased. The capacity of the compressor is reduced, and when the heating mode is switched to the cooling mode next time, the cooling operation starts from the cooling start temperature that is 2 steps higher than the set temperature, and the air conditioning load is the level that switches from heating. , The room temperature will drop rapidly, but by increasing the conventional set room temperature to a certain high temperature and gradually returning it to the original set room temperature with the lapse of the timer, the room temperature will be reduced earlier. Work ability control of the compressor, since gradually decreases without abrupt room temperature reduction, there is no discomfort due to rapid change in room temperature, there is an effect that it is possible to maintain a comfortable indoor environment.

Similarly, when the cooling mode is switched to the heating mode, the conventional set room temperature is lowered to a certain temperature, and the room temperature rises by gradually returning to the original set room temperature as the timer elapses. On the other hand, the capacity control of the compressor is activated earlier, a sudden rise in room temperature does not occur, there is no discomfort due to a sudden change in room temperature, and a comfortable indoor environment can be maintained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of an air conditioner according to the present invention.

FIG. 2 is a block diagram of the air conditioner of the same embodiment.

FIG. 3 is a flowchart showing the operation of the air conditioner of the same embodiment.

FIG. 4 is a schematic configuration diagram of another embodiment of the air conditioner according to the present invention.

FIG. 5 is a block diagram of the air conditioner of the same embodiment.

FIG. 6 is a flowchart showing the operation of the air conditioner of the same embodiment.

FIG. 7 is a schematic configuration diagram of another embodiment of an air conditioner according to the present invention.

FIG. 8 is a block diagram of the air conditioner of the same embodiment.

FIG. 9 is a flowchart showing the operation of the air conditioner of the same embodiment.

FIG. 10 is a schematic configuration diagram of a conventional air conditioner.

FIG. 11 is a flowchart showing the operation of the conventional air conditioner.

[Explanation of symbols]

 2 Indoor heat exchanger 3 Indoor fan 6a Compressor 7 Outdoor heat exchanger 8 Outdoor fan 14 Room temperature setting device 15 Room temperature detector 17,23,29 Operation control device 18,24,30 Temperature setting device 21 Counter 27 , 33 timers

Claims (3)

[Claims] 1. An air conditioner that has an indoor heat exchanger, an indoor blower, a variable capacity compressor, an outdoor heat exchanger, and an outdoor blower, and performs cooling operation and heating operation,
Operates the air conditioner with the values of the room temperature setter that sets the room temperature, the room temperature detector that detects the room temperature, the set room temperature set by the room temperature setter, and the room temperature detected by the room temperature detector. While including an operation control device for controlling, the operation control device, a temperature setter for setting a predetermined temperature for the set room temperature inside, the number of times the compressor stopped after switching from the cooling mode to the heating mode, and heating It is equipped with a counter that counts the number of times the compressor stops after switching from the cooling mode to the cooling mode.In heating operation, the compression function increases when the room temperature is lower than the set room temperature, and the compression function strength increases when the room temperature is higher than the set room temperature. Control the capacity of the compressor to reduce
The compressor operation is stopped at the heating stop temperature higher than the set room temperature by the blower operation, and the cooling operation is started at the cooling start temperature higher than the heating stop temperature by the specified value, and the room temperature is higher than the set room temperature during the cooling operation. The higher the compression function power is, the more the room temperature is lower than the set room temperature.The compression function power is decreased, and the compressor capacity is controlled.The compressor operation is stopped at the cooling stop temperature lower than the set room temperature by a predetermined value, and the blower operation is performed. , Performs the cooling / heating automatic operation control that starts the heating operation at the heating start temperature lower than the cooling stop temperature by the predetermined value, and when the heating / cooling automatic operation control switches the heating mode to the cooling mode, the set room temperature is counted by the counter. When the number of times the compressor is stopped is increased by a certain amount until the number of times it stops reaches a certain number, and the mode is changed from cooling mode to heating mode, the set temperature is An air conditioner compressor number of stops to count was characterized by lowering a constant temperature until a predetermined number of times. 2. An air conditioner that has an indoor heat exchanger, an indoor blower, a variable capacity compressor, an outdoor heat exchanger, and an outdoor blower, and performs cooling operation and heating operation,
Operates the air conditioner with the values of the room temperature setter that sets the room temperature, the room temperature detector that detects the room temperature, the set room temperature set by the room temperature setter, and the room temperature detected by the room temperature detector. With the operation control device for controlling, the operation control device, the temperature setter for setting a predetermined temperature for the set room temperature inside, after switching from the cooling mode to the heating mode, and from the heating mode to the cooling mode It is equipped with a timer that operates after switching, and during heating operation, the compression function power is increased as the room temperature is lower than the set room temperature, and the compression function is controlled as the room temperature is higher than the set room temperature. When the heating stop temperature is higher than the set room temperature by a specified value, the compressor operation is stopped and the air blow operation is performed.The cooling operation is started at the cooling start temperature that is higher than the heating stop temperature by the specified value and the cooling operation is performed. When the room temperature is higher than the set room temperature, the compression function is increased, and when the room temperature is lower than the set room temperature, the compression function is decreased. When the operation is stopped and blown, and the cooling / heating automatic operation control is started to start the heating operation at the heating start temperature lower than the cooling stop temperature by the predetermined value, and when the heating / cooling automatic operation control switches from the heating mode to the cooling mode, An air conditioner that raises the set room temperature by a timer for a predetermined period of time and lowers the set room temperature by a timer for a predetermined period of time when switching from the cooling mode to the heating mode. 3. An air conditioner which has an indoor heat exchanger, an indoor blower, a variable capacity compressor, an outdoor heat exchanger, and an outdoor blower, and which performs cooling operation and heating operation,
Operates the air conditioner with the values of the room temperature setter that sets the room temperature, the room temperature detector that detects the room temperature, the set room temperature set by the room temperature setter, and the room temperature detected by the room temperature detector. With the operation control device for controlling, the operation control device, the temperature setter for setting a predetermined temperature for the set room temperature inside, after switching from the cooling mode to the heating mode, and from the heating mode to the cooling mode It is equipped with a timer that operates after switching, and during heating operation, the compression function power is increased as the room temperature is lower than the set room temperature, and the compression function is controlled as the room temperature is higher than the set room temperature. When the heating stop temperature is higher than the set room temperature by a specified value, the compressor operation is stopped and the air blow operation is performed.The cooling operation is started at the cooling start temperature that is higher than the heating stop temperature by the specified value and the cooling operation is performed. When the room temperature is higher than the set room temperature, the compression function is increased, and when the room temperature is lower than the set room temperature, the compression function is decreased. When the operation is stopped and blown, and the cooling / heating automatic operation control is started to start the heating operation at the heating start temperature lower than the cooling stop temperature by the predetermined value, and when the heating / cooling automatic operation control switches from the heating mode to the cooling mode, Raise the set room temperature to a certain temperature, gradually return to the original set room temperature with the elapsed time of the timer, and switch from cooling mode to heating mode,
An air conditioner characterized by lowering the set room temperature by a certain temperature and gradually returning to the original set room temperature as the timer elapses.