JPH0351649A - Air conditioner - Google Patents

Abstract

PURPOSE:To increase an amount of irritation against a physical function of an occu pant or an occupant's brain and provide an efficient comfortable environment by a method wherein in case of performing a cooling operation, an amount of blown air is controlled according to a temperature of a blowing air stream with a blowing air control means and a variation of air volume of the blowing air is added to a controlling of a cooling/heating operation. CONSTITUTION:An interior temperature and a set temperature are compared to each other by operation control means 13 and 14. If its difference is less than a predeter mined temperature range, two threshold values are set according to a value between the interior temperature and the set temperature, a cooling/heating operation having a predetermined temperature range around the set temperature and then the interior temperature is controlled to show a value near the set temperature within a predeter mined temperature range. At this time, an amount of blowing air is controlled by blowing air amount control means (17, 18, 19) according to a temperature of the blow ing air, and a variation of air amount of the discharging air is added to a control of the cooling/heating operation according to a temperature variation around a differ ence between the interior temperature detected by the operation control means 13 and 14 and the set temperature. With such an arrangement as above, an amount of irritation against a physical function of the occupant or the occupant's brain.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner that cools and heats a living space, and particularly relates to an air conditioner that provides a living space with a pleasant and comfortable environment.

[Prior Art] Figures 7 to 9 relate to the air conditioner described in the earlier patent application No. 1-65096, and Figure 7 is a block diagram showing the conventional air conditioner; FIGS. 8 and 9 are flowcharts showing a heating and cooling control means during cooling operation of a conventional air conditioner.

In Fig. 7, (1) is a power switch, (2) is a temperature detector such as a thermistor that detects the indoor temperature, and (3) is an A/C converter that converts the output of the temperature detector (2) into a digital signal. The D conversion section (4) is a switching section that sets the operating temperature and the operating mode when performing the cooling/heating operation.

(6) is an input circuit into which the output of the A/D converter (3) and the output from the switching unit (4) are input, and (7) reads the data from the input circuit and stores it in the memory (8). The circuit (9) outputs instructions according to the execution program being executed.
). And these input circuits (
6), CPU (7), memory (8), and output circuit (9)
Microcomputer (5) which is a heating and cooling control means
is considered. This microcomputer (5) outputs II1 commands for heating and cooling. (13) is executed by the control command of the microcomputer (5).
It is an output adjustment means for controlling on/off of a compressor that generates air-conditioning capacity, and (14) is an air-conditioning generating means that can vary the air-conditioning capacity by varying the rotational speed of the compressor.

Next, the cooling operation of the conventional air conditioner having the above structure will be explained using the flowcharts shown in FIGS. 8 and 9.

In the figure, rTL J is a first set temperature lower than the set temperature "Ts", and rTIIJ is a second set temperature higher than the set temperature rTsJ. Further, the first set temperature rTLJ and the second set temperature rTIIJ are automatically set within a predetermined temperature range by setting the set temperature rTsJ in the switching section (4).

In step S1, a set temperature rTsJ for cooling operation is set, and in step S2, an operating mode, either normal mode or variable mode, is set. In step S3, the indoor temperature rTr
J is detected, and high capability is set in step S4. This high ability setting sets the conditions in step S9, which will be explained later. In step S5, the cumulative time rtJ is initialized (t=0). Then, in step S6, conditions for the operating mode set in step S2 are determined.

If the operation mode set in step S2 is the normal mode, the process advances to step S7. Step S7 uses the set temperature rTsJ set in step S1 and step S3.
The cooling capacity is calculated by comparing the detected indoor temperature "Tr". Then, a control command corresponding to the cooling capacity is applied to the output adjusting means (13) to perform cooling operation.

When the cooling capacity is calculated and the cooling operation is started, the process returns from step S7 to step S1. Therefore, a normal mode control loop is configured from step S1 to step S4, and returns to step S1 through step S5, step S6, and step S7.
Calculation of the cooling capacity for lowering the temperature to the set temperature rTsJ continues, and the cooling operation in the normal mode operation continues.

If the change mode operation is set in step S2, the process advances from step S6 to step S8. In step S8, the room temperature "Tr" is higher than the second set temperature "T11" which is higher than the set temperature rTs.
” is low or not. If the indoor temperature rTrJ is higher than the second set temperature rTIIJ,
That is, in a state where the indoor temperature at the beginning of cooling has not decreased sufficiently, the process proceeds to step S7, and the control loop of the normal mode operation is returned. For this reason, step S8
Until the indoor temperature reaches IT r J, which satisfies the conditions of
Cooling is performed in normal mode operation.

As cooling progresses, the temperature inside the living room decreases, and the indoor temperature rT
When rJ falls within a range lower than the second set temperature rTIIJ, the condition of step S8 is satisfied and the process proceeds to step S9. This step s9 is for making a conditional judgment as to whether or not the ability is high, and when this routine is entered for the first time, the process proceeds to step 810 since the ability is set to be high in step S4.

Proceeding to step SIO, counting of the cumulative time rtJ, which was reset to zero in step S5, is started. Step 811 determines whether the cumulative time rtJ at which counting has started is greater than a certain time rtcJ that is a preset predetermined time, that is, whether a certain time rtcJ has elapsed since counting started. A conditional judgment is made as to whether or not this is the case.

If the cumulative time rtJ is smaller than the predetermined time rtcJ, that is, if the predetermined time rtcJ has not elapsed, the process proceeds to step S12 based on the condition determination in step Sll.

Step S12 is a first set temperature rTLJ lower than the set set temperature rTsJ set in step S1.
A comparison is made between the temperature and the indoor temperature "T". As a result of the comparison, if the indoor temperature rTrJ is higher than the first set temperature rTLJ, the process proceeds to step 813, where a command for high cooling capacity operation is output to the output adjustment means (13) to perform high capacity cooling operation. Let them do it. Then, the process returns to step SIO. Therefore, if a certain period of time rtcJ has not elapsed, the control loop consisting of the routine of step S10, step 811, step S12, and step 813 will
High-performance cooling continues until step S12, which is a condition determination, is satisfied.

Therefore, the first room temperature "Tr" is the first set temperature r
It drops to TL J.

The indoor temperature IT r J is the first set temperature rTL J
When the temperature decreases to 1, the process proceeds to step S14 based on the condition determination in step S12. In this step 814, the indoor temperature rTrJ becomes the same as the first set temperature rTLJ, and the cooling capacity for maintaining this temperature is calculated and added to the output adjustment means (13) to continue the cooling operation. do. Then, the process returns to step 310. Therefore, until the cumulative time rtJ reaches a certain time rtcJ, the control loop consisting of the routine of step S10, step S11, step S12, and step S14 is executed.
This is to maintain the room temperature rTrJ at the first set temperature rTLJ.

When a certain period of time rtcJ has elapsed, the condition in step S11 is satisfied, so the process proceeds to step S15 to set a low capacity, and in step S16, the cumulative time rtJ is reset to initialize (t=0), Return to step S6.

The operation mode is set to the change mode in step S2, and the indoor temperature rTrJ is set to the second set temperature rTI{J
Since the first set temperature rTI,J is lower,
Step S9 after satisfying step S6 and step S8
Proceed to. In step S9, since the capacity is set to be low in step S15, the condition is not satisfied and the process proceeds to step S17. Step S17 is the step SI
This is similar to O, and counts the cumulative time rtJ. Step 818 is similar to step 811, and is for comparing the constant time "tC" and the cumulative time rtJ.

If the certain time “tC” has not elapsed, step S
Proceeding to step 19, the indoor temperature rT r J and the second set temperature rTtl J are compared. The indoor temperature “Tr” is the second
If the set temperature rTH is lower than the set temperature rTHJ, that is, if the conditions are not satisfied, the process proceeds to step S20, and operation at a low cooling capacity is commanded. Therefore, in step S14, the cooling capacity command for keeping the indoor temperature rT r J constant at the first set temperature rTL J is canceled, resulting in a low capacity cooling operation.

After instructing low-capacity cooling operation in step 820, the process returns to step S17.
8. Due to the control loop consisting of the routine of steps S19 and S20, the low capacity cooling operation of step S20 is continued until the predetermined time rtcJ has elapsed.

Therefore, the indoor temperature rTrJ, which was kept constant at the first set temperature fTLJ, increases.

When the indoor temperature rTrJ rises to the second set temperature rTIIJ due to the low-capacity cooling operation in step 820, the condition determination in step S19 becomes affirmative, and the process proceeds to step S21. Then, the cooling capacity that keeps the indoor temperature iTrJ constant at the second set temperature fTIIJ is calculated, and a command is given to the output adjustment means (13). And step S
Return to 17.

Therefore, the control loop is configured by the routine of step S17, step S18, step S19, and step S21, and the control loop continues until a certain period of time rtcJ has elapsed.
The indoor temperature rT r J is maintained at a constant temperature at the second set temperature rTIIJ.

When the accumulated time rtJ in the step 817 is counted and becomes equal to the constant time "tc", the routine proceeds to step S1 based on the condition judgment in step 818, and similarly to the first time, the routine sets high capacity in the step S4. After satisfying the conditions of steps S8 and S9, the process proceeds to step S10, and high-capacity cooling operation is performed in step S13 until the predetermined time rtcJ has elapsed, and the indoor temperature rTrJ is set to the first set temperature rTL. After the temperature drops to J, the indoor temperature rTrJ is kept constant at the first set temperature rTLJ in step S14.

In this way, the above-mentioned air conditioner inputs the indoor temperature rTrJ and the set temperature rTsJ and performs heating and cooling operation to control the set temperature "Ts" or a temperature close to it. Step S of comparing rT r J and the set temperature "Ts" and performing heating and cooling operation according to the difference when the difference is greater than a predetermined temperature range.
The first control means consisting of the routine from step S1 to step S8 compares the indoor temperature rTrJ and the set temperature rTsJ, and when the difference is less than a predetermined temperature range, the indoor temperature rT
The routine consists of a routine from step S12 to step S14 and a routine from step S19 to step S21, in which two types of threshold values are set depending on the magnitude relationship between rJ and the set temperature rTsJ, and heating and cooling operation is performed in a predetermined temperature range centered on the set temperature. The first control means and the second control means constitute an operation control means. Further, step SIO, step Sll, step S15, and step S limit the time limit for maintaining heating and cooling operation control in a predetermined temperature range by the second control means.
16 routine and step S17, step S18,
It is provided with a timer consisting of a routine of step S22 and step S16.

During the cooling operation, the switching unit (4) sets the operating mode of normal mode operation or variable mode operation, and at the same time sets the set temperature rTsJ to bring the indoor temperature to the desired temperature. Then, the indoor temperature detected by the temperature detector (2) is converted by the A/D converter (3), and this is converted into the detected indoor temperature "Tr" by the microcomputer (5) which is the air conditioning control means. ).

The microcomputer (5) includes a switching section (
In 4), if the normal mode operation is set, the detected indoor temperature ITrJ and the set temperature rTs
The cooling capacity is calculated by performing a comparison calculation with J, and based on this, a command for capacity control is output to the output adjustment means (13).

The output adjusting means (13) varies the cooling capacity of the heating and cooling generating means (14) in accordance with control commands from the microcomputer (5). Therefore, if the temperature difference between the indoor temperature rTrJ and the set temperature rTsJ decreases, the cooling capacity also decreases, and the indoor temperature rTrJ changes to the set temperature rTsJ.
This is to control around TsJ.

In addition, when the switching unit (4) is set to change mode operation, at the beginning of the cooling operation,
Cooling operation is performed in the normal mode operation to cool the room.

When the indoor temperature rTrJ reaches the second set temperature FTIIJ which is higher than the set temperature rTsJ, the indoor temperature rTrJ is set to the second set temperature FTIIJ which is lower than the set temperature rTsJ with high cooling capacity until the cumulative time rtJ is counted and a certain time rtcJ has elapsed. After lowering the set temperature FTI,J to the set temperature FTI, J, the output adjusting means (13
) to maintain the indoor temperature at the first set temperature rTLJ.

The indoor temperature rTrJ is set to the first set temperature rTI. , J, and when a certain time jtcJ elapses, the cumulative time rtJ is reset. Then, the room temperature rTrJ is changed to the set temperature r at a low cooling capacity until the cumulative time rtJ is counted and a certain time rtcJ has elapsed.
After raising the indoor temperature rTIIJ to a second set temperature rTIIJ higher than TsJ, a cooling capacity control command to keep it constant is output to the output adjusting means (13), and the indoor temperature rTrJ is raised to the second set temperature rTIIJ.
The set temperature rTI{J is maintained.

Then, when a certain period of time rtcJ has passed, the cumulative time rt
J is reset again to start counting, and the indoor temperature rTrJ is lowered again to the first set temperature rTI,J by changing to high-capacity cooling operation.

[Problem to be Solved by the Invention] In the conventional air conditioner as described above, the indoor temperature is compared with the set temperature, and the cooling/heating operation is appropriately controlled according to the difference, so that the indoor temperature changes from the set temperature to a predetermined value. By repeatedly raising or lowering the temperature within a set temperature range of -I2, the occupant's physiological functions or cerebrum were stimulated to create a pleasant and comfortable environment. Furthermore, it has been empirically known that this pleasant and comfortable environment is determined by the amount of stimulation given to the physiological functions or cerebrum of the abuser.

That is, for example, in the case of air conditioning operation, the greater the amount of stimulation, the cooler the sensation was.

However, in conventional air conditioners of this type, although the temperature of the outlet air changes as the cooling and heating capacity changes,
The blowout air volume itself was constant, and the room temperature changed very slowly and the response was slow. Moreover, conventional air conditioners of this type frequently stimulate the occupant's physiological functions or cerebrum by appropriately changing the indoor temperature, and the amount of stimulation is limited because the stimulation is only due to temperature changes. There were relatively few. For this reason, it has been desired to provide an air soothing machine that can provide a greater amount of stimulation to residents.

Therefore, this invention provides a greater amount of stimulation to the physiological functions or cerebrum of the occupant when comparing the indoor temperature and the set temperature and appropriately controlling the heating and cooling operation according to the difference, thereby improving the comfort of the indoor environment. The objective is to provide an air conditioner that can promote the

[Means for Solving the Problems] An air conditioner according to the present invention inputs an indoor temperature and a set temperature and performs heating and cooling operation to control the set temperature or a temperature close to the set temperature. A first temperature detection means for detecting temperature compares the indoor temperature detected by the first temperature detection means with a set temperature, and when the difference is greater than a predetermined temperature range, heating and cooling is performed according to the difference. At the same time, if the difference is less than a predetermined temperature range, a threshold value for two volatiles is set based on the magnitude relationship between the indoor temperature and the set temperature, and heating and cooling operation is performed within a predetermined temperature range centered around the set temperature. Operation control means;
a second temperature detection means for detecting the temperature of the airflow of cold air or hot air during the cooling/heating operation; and controlling a blower of cold air or hot air according to the temperature detected by the second temperature detection means. It is equipped with a blowout air volume control means.

[Function] In the air conditioner of the present invention, the operation control means compares the indoor temperature and the set temperature, and when the difference is greater than a predetermined temperature value, performs heating and cooling operation according to the difference, and If the difference is less than a predetermined temperature range, two types of threshold values are set depending on the magnitude relationship between the indoor temperature and the set temperature, and heating and cooling operation is performed within a predetermined temperature range centered around the set temperature, and the indoor temperature is set to the set temperature. Control the temperature within a predetermined range at nearby temperatures. During the cooling/heating operation, the blowing air volume is controlled by the blowing air volume control means according to the temperature of the blowing air flow, and the air cooling/heating is mainly controlled by the temperature change according to the difference between the room temperature and the set temperature by the operation control means. The amount of stimulation given to the occupant's physiological functions or cerebrum is increased by adding changes in the volume of the blown airflow to the operation control.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an air conditioner that is an embodiment of the present invention. Note that in the drawings, (1) to (14) are the same or corresponding components to those of the conventional example, and therefore, redundant explanations will be omitted.

In Fig. 1, (15) is a temperature sensor such as a thermistor installed at the outlet (not shown) of the indoor unit of the air conditioner, and (16) is the digital output of the temperature sensor (15). This is an A/D converter that converts into a signal. The temperature detector (15) and the A/D converter (16) constitute a second temperature detecting means that detects the temperature of the cold air or hot air blowing out during air conditioning operation. Also in this embodiment, as in the conventional example, the temperature detector (2) and the A/D
The indoor temperature is detected by the conversion section (3), and these constitute the first temperature detection means.

The temperatures detected by the first and second temperature detection means are both input to the human power circuit (6) of the microcomputer (5). (17) is a drive circuit that is operated by the output of the output circuit (9) of the microcomputer (5), (18) is a motor that is driven by this drive circuit (17), and (1) is a motor that changes the rotational speed. This is a blower fan that changes the amount of air being blown out. The drive circuit (17), the motor (18), and the blower fan (19) constitute a blowout air volume control means that controls the blowout volume of cold air or warm air.

The blowout air volume by this blowout air volume control means changes according to the temperature detected by the second temperature detection means, and this change command is given according to a predetermined program stored in the memory (8) of the microcomputer (5). .

Next, the operation of the air conditioner of this embodiment will be explained using an example during cooling operation. The air conditioner having the structure described above operates as shown in FIGS. 2 to 4. 2 and 3 are flowcharts showing the heating and cooling control means during cooling operation of an air conditioner according to an embodiment of the present invention, and FIG. 4 is a flowchart showing the amount of air blown during the heating and cooling control operation shown in FIGS. 2 and 3. It is a flowchart which shows the example of blow-out air volume control operation by a control means.

Note that steps S1 to S in FIGS. 2 and 3
The operation of each step in step 21 is as shown in FIGS. 8 and 9 of the above conventional example.
Since it is the same as the figure and performs the same operation as the conventional example, the explanation will be omitted here, and the explanation will focus on the differences.

2 and 3, the difference from the conventional example is that step Ssb is interposed between step S8 and step S9. In this step Ssb, a blowout air volume control operation is performed by the blowout air volume control means. This blowout air volume control operation constitutes a subroutine as shown in FIG.

In FIG. 4, first, in step S31, the blowing temperature T'
is detected. That is, during the cooling/heating operation, the temperature of the airflow of cold air is detected by the second temperature detection means. In step S32, the amount of air blown out is calculated based on the detected temperature. This calculation is performed by the CPU (7) and memory (8) of the microcomputer (5).

Here, the calculation operation of this blown air volume will be explained. FIG. 5 is an operating characteristic diagram showing the relationship between the blowout air volume and the blowout temperature of the blowout air volume control means used in the air conditioner according to the embodiment of the present invention. As shown in this figure, the relationship between the blown air volume and the blown air temperature is such that when the blown air temperature is high, the blown air volume is set to be large, and conversely, when the blown air temperature is low, the blown air volume is set to be small. Then, based on this relationship, the amount of air blown according to the blowing temperature "T" during the cooling/heating control operation is calculated.

Returning to the explanation of FIG. 4 again. In step 832, the blower fan (
1) to control the rotation speed. That is, the drive circuit (17) and motor (18) are operated by the output from the output circuit (9) of the microcomputer (5), and the blower fan (
By appropriately controlling the rotation speed of (1), the actual amount of air blown out can be changed. Thereafter, the control exits from this subroutine, returns to the main routine, and performs the same control operations as in the conventional example.

In this way, in the air conditioner of this embodiment, when the power switch (1) is turned on, heating and cooling control is performed according to the flow shown in FIGS. 2 and 3.

That is, the operation control means compares the indoor temperature and the set temperature, and when the difference is greater than or equal to a predetermined temperature range, the heating and cooling operation is performed according to the difference, and when the difference is less than the predetermined temperature range. Sometimes, a two-way threshold is set depending on the magnitude relationship between the indoor temperature and the set temperature, and air-conditioning/heating operation is performed within a predetermined temperature range centered around the set temperature, so that the indoor temperature is within the predetermined temperature range at a temperature near the set temperature. to control.

Furthermore, the heating and cooling operation control within this predetermined temperature range changes the threshold temperature according to the time limit set by the time limit means. During this cooling/heating operation, the temperature of the blown air flow is detected, and the blown air volume is controlled by the blown air volume control means according to the detected temperature.

Next, the relationships among the cooling capacity, room temperature, outlet temperature, and outlet air volume of the air conditioner of this embodiment will be explained. 6th
The figure is a characteristic diagram showing the relationship between cooling capacity, room temperature, outlet temperature, and outlet air volume in each operation mode of an air conditioner according to an embodiment of the present invention. The horizontal axis represents time, and the vertical axis represents cooling capacity, room temperature, outlet temperature, and outlet air volume, respectively.

In FIG. 6, when the operation mode is set to normal mode and the operation of the air conditioner is started at time rTI J, the room temperature decreases toward the set temperature shown by the broken line. In this air conditioner, the cooling capacity is determined by the difference between the set temperature and the room temperature, so the cooling capacity decreases as the room temperature decreases. Then, at time "T2", the room temperature substantially matches the set temperature, and the cooling capacity also enters the stable range. In addition, when the operation mode is set to change mode at time "T3", the cooling capacity changes periodically by comparing the temperature difference between the set temperature and the room temperature as shown in the figure, and the blowout temperature also changes depending on the cooling capacity and the room temperature. Under the influence, it changes as shown in the figure. As a result, the room temperature changes periodically around the set temperature, and repeatedly rises and falls at a predetermined set temperature.

On the other hand, when the operation mode becomes the change mode at time "T3", in this embodiment, the blowout air volume changes as shown in the figure in accordance with the change in blowout temperature. When the amount of air blown out changes, the airflow of cold air that hits the occupants in the room changes. As a result, the stimulation given to the occupant's physiological functions or cerebrum changes. This stimulus is influenced and affected by the temperature and volume of the airflow hitting the occupant.

In other words, the greater the amount of airflow that hits the occupant, the greater the amount of stimulation to the body, etc., and the lower the temperature of the airflow, the more
The amount of stimulation increases. The relationship between the blowout air volume and the blowout temperature shown in Fig. 5 above is set in consideration of the amount of stimulation given to the occupant's physiological functions or cerebrum by the airflow volume and temperature, and the total stimulation amount due to the airflow. is kept approximately constant.

In this way, in this embodiment, in addition to a predetermined change in room temperature, a change in the volume of the blown airflow is added to pleasantly stimulate the temperature-receptive region of the occupant's skin, thereby further activating physiological functions or the cerebrum.

As described above, in the air conditioner of this embodiment, the indoor mixture rTrJ is set at the set temperature rTs by the heating and cooling operation control operation.
When the indoor temperature "Tr" reaches the first set temperature rTi,J while repeating two rises and falls between the first set temperature rTLJ, which is lower than J, and the second set temperature rTIIJ. This is maintained for a certain period of time tcJ, and when the indoor temperature rT r J reaches the second set temperature 11, this is maintained for a certain period of time rtcJ. Therefore, the indoor temperature rTrJ of the living room repeatedly rises and falls within a certain temperature range with a certain period. Furthermore, during this cooling/heating operation, the blowout air volume is changed according to the temperature of the blowout airflow by the blowout air volume control means. In this way, by adding changes in the air volume of the outlet airflow to the control of the heating and cooling operation mainly based on temperature changes according to the difference between the indoor temperature and the set temperature by the operation control means, it is possible to reduce the stimulation caused by changes in the room temperature and the air volume of the outlet airflow. At the same time, stimulation by change is given to residents' physiological functions. Therefore, the total amount of stimulation given to the occupant's physiological functions or cerebrum is increased compared to the conventional case where only room temperature changes are caused.

As a result, due to changes in room temperature and changes in the airflow volume,
Residents' physiological functions are greatly stimulated, and their cerebral activity becomes more active. In addition, compared to conventional methods, which create a livable and comfortable environment where you do not feel hot or cold in your living room by controlling only changes in room temperature, this can be achieved more effectively and can also contribute to energy savings. .

Incidentally, although the above embodiment has been explained using the case of cooling operation as an example, the same operation control can be performed in the case of heating operation, and the same effect can be achieved.

In other words, in the case of heating operation, Figures 2 and 3
In the flowchart shown in the figure, the "cooling capacity calculation/command" in step S7 is changed to "heating capacity calculation/command",
“T”≦Tll”, which is the condition judgment in step S8, is
r≧Tll”, which is the conditional judgment in step S12.
r≦TI,” to “TraTL”, and step S
19 conditional judgment “Tr≧TL” is changed to “Tr≦TI,
”, similar operation control becomes possible even during heating operation.

Further, in the above embodiment, an air conditioner has been described in which a time limiter controls a time limit for maintaining heating and cooling operation control within a predetermined temperature range by an operation control means at each set time, but this time limiter is not necessarily required.

Further, in the above embodiment, a case has been described in which there is a selection switch between the normal mode and the change mode, but there may be no selection switch and the vehicle may always operate in the change mode. Further, in the above embodiment, a case has been described in which the change mode is entered when the room temperature is within a range near the set temperature, but it is also possible to always operate in the change mode.

[Effects of the Invention] As explained above, the air conditioner of the present invention compares the indoor temperature and the set temperature using the operation control means, and when the difference is greater than a predetermined temperature range, the air conditioner controls the operation control means to adjust the temperature according to the difference. At the same time, when the difference is less than a predetermined temperature range, two types of threshold values are set depending on the magnitude relationship between the indoor temperature and the set temperature, and the air-conditioning and heating operation is performed within a predetermined temperature range centered around the set temperature. , the indoor temperature is controlled within a predetermined temperature range at a temperature near the set temperature. During the cooling/heating operation, the blowing air volume is controlled by the blowing air volume control means according to the temperature of the blowing air flow, and the air cooling/heating is mainly controlled by the temperature change according to the difference between the room temperature and the set temperature by the operation control means. By adding a simple configuration in which changes in the air volume of the airflow are added to the operation control, the amount of stimulation given to the occupant's physiological functions or the cerebrum can be increased, so a pleasant and comfortable environment can be efficiently and economically realized.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an air conditioner that is an embodiment of the present invention, and FIGS. 2 and 3 are air conditioning control means during cooling operation of the air conditioner that is an embodiment of the present invention. FIG. 4 is a flowchart showing an example of the blowout air volume control operation by the blowout air volume control means during the air conditioning control operation of FIGS. 2 and 3, and FIG. An operating characteristic diagram showing the relationship between the airflow volume and airflow temperature of the airflow control means used, and Figure 6 shows the cooling capacity, room temperature, airflow temperature, and airflow in each operation mode of the air conditioner of the fourth embodiment of the present invention. Characteristic diagram showing the relationship with air volume, Figure 7 is a block diagram showing a conventional air conditioner, Figures 8 and 9
The figure is a professional chart showing a heating and cooling control means during cooling operation of a conventional air conditioner. In the figure, 2: Temperature detector 5: Microcomputer 13: Output adjusting means 14: Cooling/heating generating means 15: Temperature detector 19: Air blowing fan. Note that in the drawings, the same reference numerals and symbols indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] In an air conditioner that inputs an indoor temperature and a set temperature and performs heating and cooling operation to control the set temperature or a temperature close to the set temperature, a first temperature detection means for detecting the indoor temperature; The indoor temperature detected by the first temperature detection means is compared with the set temperature, and if the difference is greater than a predetermined temperature range, heating and cooling operation is performed according to the difference, and the difference is within a predetermined temperature range. an operation control means for setting two types of threshold values depending on the magnitude relationship between the indoor temperature and the set temperature when the temperature is below the set temperature, and performing cooling/heating operation in a predetermined temperature range centered around the set temperature; Alternatively, the device includes a second temperature detection means for detecting the temperature of the hot air blown airflow, and a blowout air volume control means that controls the blowout volume of the cold air or the hot air according to the temperature detected by the second temperature detection means. An air conditioner characterized by: