JP2941910B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an air conditioner capable of providing a comfortable feeling in a living space such as a room.

[Conventional technology]

Conventionally, air conditioners need to be able to provide a more comfortable indoor environment in addition to the original function of warming the room when it is cold and cooling it when it is hot. Have been proposed.

As one example, the air conditioning method disclosed in Japanese Patent Publication No. 55-48222 is to generate a wind in which the wind direction and the wind vary irregularly with a frequency distribution similar to that of a natural breeze. In this way, a comfortable indoor environment close to nature can be obtained.

As another example, in Japanese Patent Publication No. 61-56805, comfort is improved by irregularly changing physical quantities as stimuli such as heat generation, temperature, and air flow by a stove, an air conditioner, a fan, and the like. A physical quantity control device adapted to be obtained is disclosed. Here, a specific example of an electric stove is shown. According to this, the amount of heat generation and the duration thereof change irregularly, and moreover, a plurality of ways of the change are set, so that the user can select one of them. .

As still another example, the room temperature is periodically changed around the temperature set by the user, and at the same time, the direction (wind direction) of the airflow blown out from the indoor fan is changed so that the wind sometimes hits the occupants in the room. An air conditioner designed to provide a comfortable feeling is also proposed (for example, an "electric store").
(Dempa Shimbun), April 1990 p.202).

[Problems to be solved by the invention]

However, each of the above conventional techniques has the following problems.

In the prior art described in Japanese Patent Publication No. 55-48222, the wind direction and wind speed are changed irregularly to obtain an effect like a natural wind. This is an important factor in obtaining the information, and no consideration has been given to this point. That is, in the conventional technology, it is considered that the room temperature is kept constant.
Even if the user feels comfortable at the wind speed, the sense of comfort may be lost at other wind directions and wind speeds, and the sense of comfort may not always be obtained.

According to the technique described in Japanese Patent Publication No. 61-56805, it is conceivable to change the temperature of the space (that is, the room temperature) when performing the cooling operation with the air conditioner. However, in the case of cooling operation, when the room temperature falls, a comfortable feeling is obtained,
When the room temperature rises, a feeling of comfort is not obtained, but rather a feeling of discomfort may occur. Therefore, even in this conventional technique, a comfortable feeling is not always obtained.

In the prior art of the above-mentioned newspaper announcement, in the case of cooling operation, when lowering the room temperature, it quickly drops with high capacity, and when raising the room temperature, it slowly increases with low capacity,
The wind direction is changed at the outlet, and when the blowing temperature is high, the downward blowing time is lengthened to shorten the time to hit the person, and when the blowing temperature is low, the downward blowing time is shortened to lengthen the time to hit the person.

However, according to the conventional technology, at the time of high-capacity driving, the room temperature may drop too much, the room temperature may drop sharply depending on the target load such as the size of the room, and the skin may feel cold. It does not always mean that a comfortable feeling can be obtained.

Whenever the wind direction is changed, the wind direction angle is preset, and the airflow may not be applied depending on the position of the occupant in the room.

An object of the present invention is to provide an air conditioner that solves such a problem and can always maintain a comfortable feeling.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a first means for changing a target temperature with respect to a set temperature for obtaining a desired room temperature, and a second means for changing a rotation speed of an indoor fan according to a detected room temperature. A control unit having the second means and the control unit, the control unit repeatedly changing the target value and the rotation speed of the indoor fan over time.

(Operation)

With the first and second means, it is possible to change the wind speed of the airflow from the room and from the indoor fan over time.

In the cooling operation, as described above, comfort is felt when the room temperature falls, and when the room temperature rises, the feeling of comfort disappears and discomfort may occur. For this reason, only by changing the room temperature, comfort can be obtained intermittently, but the comfort cannot be maintained.

Therefore, in the present invention, the wind speed of the airflow from the indoor fan is changed according to the room temperature, and the loss of comfort accompanying the rise in the room temperature is compensated for by increasing the wind speed. According to this, it is also possible to prevent the coldness caused by the air current being applied at a strong wind speed when the room temperature falls, by reducing the wind speed.

〔Example〕

First, an outline of an air conditioning method for maintaining a comfortable feeling according to the present invention will be described.

According to the conventional air conditioner, for example, in the case of cooling, as shown in FIG. 9 (a), when the wind speed of the airflow from the air conditioner is constant and the desired room temperature is set by the user,
As shown in FIG. 9 (b), the room temperature decreases,
When the set temperature is reached, thereafter, the room temperature is maintained at the set temperature. However, according to such an air-conditioning method, as shown in FIG. 9 (c), the air conditioner is started and cooling is started, and when the room temperature falls, the feeling of pleasure increases, and the room temperature reaches the set temperature. The comfort level becomes the highest when it is reached, but thereafter, if the room temperature is maintained at the set temperature, the comfort level gradually fades, and finally, it does not feel uncomfortable or pleasant. According to experiments, it was like this about 60 minutes after feeling very pleasant.

By the way, according to experiments, it has been found that in the case of cooling, a person feels pleasure when the temperature decreases. In the case of cooling, on the contrary, if the temperature rises, people will feel uncomfortable, but even in such a case, if the temperature rises slowly and the amount of rise is small, the air conditioner will It has been found that increasing the blowing speed (wind speed) of the airflow to the occupants removes discomfort as if they were blowing in a gentle breeze, but rather gives them a feeling of comfort.

From this, the present invention, as shown in FIG. 10 (b), causes the temperature to fall and rise alternately in a narrow temperature range including the set temperature, and also as shown in FIG. 10 (a). In the period in which discomfort is caused by a rise in temperature, the wind speed is increased, and according to FIG.
As shown in (2), the air conditioner starts cooling and a comfortable feeling is obtained, and thereafter, the same comfortable feeling is maintained.

According to experiments, the range above and below room temperature is the set temperature ±
It has been found that it is comfortable to set the temperature to 1 ° C. and to change the room temperature at a period of about 20 minutes.

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an air conditioner according to the present invention, wherein 1 is a main body of the air conditioner, 2 is a remote control device (hereinafter, referred to as a remote controller), 10 is a control unit, and 11 is an arithmetic unit. , 12 is a timer, 13 is a room temperature detection unit, 14 is a reception unit, 15 is a room temperature fan, 16 is a compressor, 17 is a wind direction motor, 21 is a control unit, 22 is a main operation switch, 23 is a refreshing button, and 24 is a refresh button. The wind direction button 25 is a transmission unit.

In the figure, when the main operation switch 22 of the remote controller 2 is operated, the control unit 21 generates a power control signal corresponding to the operation and causes the transmission unit 25 to transmit the power control signal. In the main body 1, the power supply control signal is received by the receiving unit 14, and the power of the main body 1 is turned on or off correspondingly. That is, every time the main operation switch 22 of the remote controller 2 is operated, the power of the main body 1 is turned on and off alternately. When the power is turned on in the main unit 1, the indoor fan
The 15 compressors 16 are started, and the control unit 10 controls the indoor fan 15 and the compressor 16 so that the room temperature is maintained at the set temperature while taking in the detection information from the room temperature detection unit 13.

Although not shown, the remote controller 2 is also provided with a temperature setting means. When the user operates the temperature setting means to set a desired temperature, the control section 21 sends a set temperature signal from the transmission section 25 to the main body 1, and the main body 1 The control unit 10 controls the indoor fan 15 and the compressor 16 to bring the indoor temperature to the set temperature.

When the wind direction button 24 is operated with the remote controller 2, the control unit 21 causes the transmission unit 25 to transmit a wind direction signal in response to the operation. In the main unit 1, when the receiving unit 14 receives the wind direction signal, the control unit 10 controls the wind direction motor 17 in response to the signal, whereby the direction of the airflow blown out of the main unit 1 by the indoor fan 15 (wind direction). ) Can be changed repeatedly.

When the wind direction button 24 is operated on the remote controller 2 while the wind direction motor 17 is operating on the main body 1, the wind direction motor 17 stops.

Furthermore, when the refresh button 23 is operated with the remote control 2,
The control unit 21 generates a refreshing signal in response to the
Send from 25. When the body 1 receives the refreshing signal, the timer 12 of the control unit 10 operates in response to the signal, and the arithmetic unit 11 uses the output of the timer 12 and the room temperature detecting unit 13 and the set temperature to set the indoor fan 15 and the like. Control the compressor 16 and the tenth
Driving as described in the figure (hereinafter referred to as refreshing driving)
Is performed.

During the refreshing operation, the refresh button on the remote control 2
If you operate 23, the driving will be stopped.

Here, as shown in FIG.
The operation of is described together.

Control unit 21, when there is an input in the state waiting for input (step S _20), the main operation step 22, refreshing is the input button
23, it is determined whether those from any wind direction button 24 (step S _21). When this input is from the main operation switch 22 determines whether to generate a power control signal to turn on the computer 1 (operation signal) in the previous operation of the main operation switch 22 (step S ₂₂ ), the power supply control signal to power down the long if the body 1 than to generate a driving signal (stop signal) to generate (step S _23), also generates a driving signal if the generated stop signal (step
S ₂₄ ). Then, to transmit such a power control signal from the transmitting unit 25 (step S _27).

If the input is from the wind direction button 24 (step S
_21), by generating a wind direction signal (step S ₂₅₎ transmitting section 25
It is sent from (step S _27), input refreshing button 2
When it is from 3 to transmit from (step S _21), refreshing signal to generate (step S ₂₆₎ transmitting unit 25 (step S _27).

Note that the same applies to temperature setting and the like, and a description thereof will be omitted.

Next, referring to FIG. 3, the control unit of the main body 1 in FIG.
The ten control operations will be described together.

Control unit 10, when shall apply to the reception waiting state is a received signal (step S _30), or the received signal is a run signal,
To determine whether or other signal is a stop signal (step S _31). When the received signal is a driving signal, as described above, by operating the indoor fan 15 and the compressor 16 to start the operation (step S _32), when the received signal is a stop signal, the indoor fan 15 and the compressor 16 a stop by stopping the operation (step S _40).

Received signal driving signal, except when the stop signal, which is either a refreshing signal, determines whether the wind direction signal (step S _33).

When the received signal is a refreshing signal, if the refreshing operation described in FIG. 10 are currently underway (step S _34), the stops this refreshing operation (step
_S35 ) If the refreshing operation is not currently being performed, the refreshing operation is started (step ₃₆ ). Also,
When the received signal is a wind direction signal, the current wind direction motor 17
If There is in operation (step S _37), which is stopped (step S _37), the stop (step S _38), if the current wind direction motor 17 is stopped, make this work ( step S _39).

In the above description of FIG. 3, description of other operations such as temperature setting is omitted.

The main operation switch and the refreshing button are also provided on the main body 1,
It is needless to say that operation members such as wind direction buttons are provided, and by operating these, the operation shown in FIG. 3 is performed.

The feature of this embodiment is the refreshing operation executed in step _S36 in FIG. This will be described below with reference to FIGS. However, the fourth
FIG. 5 is a timing chart showing the time flow of the refreshing operation, FIG. 5 is a flow chart showing details of the refreshing operation routine (step _S36 ) in FIG. 3, and FIG.
Flow chart showing the details of the temperature achieved routine (step S _51, S ₅₅₎ in FIG, FIG. 7 is flow chart showing the details of the time achieve routine in FIG. 5 (step S _53, S _57), FIG. 8 is is a flow chart showing the details of the indoor fan control routine in FIG. 6 and 7 (step S _63, S _73).

As described above, when the refreshing operation is not being performed on the main body 1 (FIG. 1), the refreshing button 23 of the remote controller 2 is not used.
When (FIG. 1) is operated, a refreshing operation routine (step _{S36 in} FIG. 3) shown in detail in FIG. 5 is executed. Step S ₅₀ to S ₅₈ This refreshing operation is shown in FIG. 5
Is a cycle, and this is the next refreshing button
This is repeated until 23 (FIG. 1) is operated.

In addition, in refreshing driving, as explained earlier,
In order to maintain human comfort, it is preferable that the change in room temperature is ± 1 ° C. of the set temperature and the change width is about 2 ° C. For this purpose, the room temperature detection unit 13 (the (Fig. 1)
The range of change in room temperature detected by the
It is effective to keep it at 5 ° C. In the following description of the operation, the variation width is 0.5 ° C.

First, when the input connexion this operating refreshing operation routine begins in Figure 5, the set temperature the user decides a target temperature (step S _50), enters the temperature achieved routine (step S _51).

In this routine, as shown in FIG. 6, firstly, the timer 12 (FIG. 1) starts operating (step S _60), is by connexion room temperature to room temperature detector 13 is detected (step S _61).
Then, the target temperature (in this case, the set temperature) the compressor 16 (FIG. 1) is driven at a rotation speed corresponding to the difference between the room temperature to be detected (the step S _62).

At the start of the refreshing operation (t ₀ ), as shown in FIG. 4 (a), the temperature detected with respect to the target temperature (= set temperature) indicated by the solid line (indicated by the broken line; hereinafter, simply referred to as room temperature) )
Is sufficiently high, and as shown in FIG.
4 (a) is sufficiently high due to the cooling effect.
As shown in the figure, the room temperature drops rapidly.

In the sixth view, the compressor 16 is driven at step S _62, then the control routine of the indoor fan 15 (step S
₆₃ ) Enter.

In this control routine, as shown in FIG. 8, first, a room temperature is detected by a room temperature detecting section (FIG. 1) (step S1).
S _80), whether the room temperature is (set temperature + 0.25 ° C.) or less is determined (step S _81). In this case, as shown in FIG. 4 (a), almost at the start of the refreshing operation,
Room temperature> (set temperature + 0.25 ° C). Next, it is determined whether or not the room temperature is (set temperature + 0.5 ° C) or more (step
_S82 ). In this case, as shown in FIG.
(Set temperature + 0.5 ° C), indoor fan 15 (1st
FIG. 4) is controlled to generate a weak wind (FIG. 4 (c)).

The above is the control of the indoor fan 15 at the start of the refreshing operation, and the process proceeds to step _S64 in FIG. This step _S64 compares the room temperature with the target temperature (= set temperature),
When the room temperature reaches the target temperature, return to step S _61. That is, step S until the room temperature reaches the target temperature.
₆₁ a series of operations to S ₆₃ are repeated Kaee.

Incidentally, at the start of such a refreshing operation, although room temperature is gradually lowered, (time t ₁ of FIG. 4) room temperature (set temperature + 0.25 ° C.) becomes below, in step S _63, the Figure 8 step as shown in ,, Figure 4 by _{S 81, S 84 (c)} , the indoor fan 15 is controlled switched to breeze from weak wind. Thereby, it is possible to prevent a feeling of skin cold when the room temperature drops to near the set temperature.

Further, the by the operation of step S ₆₂ of Figure 6, it comes near the target temperature is room temperature set temperature, the rotational speed of the compressor 16 also decreases (FIG. 4 (b)).

In FIG. 6, when the room temperature reaches the target temperature (= set temperature) (step _S64 ), the timer 12 (FIG. 1)
Measurement time T (for example, 5 minutes)
If elapsed (step S _65), the Figure 5 step S
Moves connexion starting operation is terminated ₅₂ (time t ₂ of FIG. 4).

When the starting operation as described above ends, as shown in 4 (a), the target temperature (set temperature + 0.25 ° C.) (step S _52), the time achieve the routine shown in detail in Figure 7 move (step S _53).

When this time attainment routine is entered, first, in FIG. 7, the timer 12 (FIG. 1) starts time measurement (step).
S _70), is by connexion room temperature to room temperature detector 13 is detected (step S _71). And the target temperature (= set temperature + 0.25 ° C)
Compressor to rotate at a rotation speed according to the difference between
16 is controlled (step S _72).

That is, although the room temperature rises as the target temperature is raised, the target temperature is raised only by 0.25 ° C., so that the compressor 16 has a low rotation speed but the rotation state is maintained. The rapid rise in room temperature is suppressed, and the temperature rises slowly. As a result, discomfort due to an increase in room temperature is eliminated.

Further, the indoor fan 15 shown in detail in FIG.
Control is performed (step S _74), or more step S ₇₁
A series of operations to S ₇₃ is the time measured by the timer 12 is to Kaee repeated until a predetermined time T (e.g. 5 minutes) (step S _74).

However, this time achievement routine (step in FIG. 5)
During the execution of S _53), as shown in FIG. 4 (c), the indoor fan 15 is Okutsu breeze, in step S ₇₄ of FIG. 7, as shown in FIG. 8, room temperature (set temperature + 0.5 ℃)
Unless otherwise, the breeze will continue to be sent. However, as described above, since the so as to increase the room temperature Wayutsukuri, the until the time measured by the timer 12 reaches the set time T (the step S ₇₄₎ room temperature (set temperature + 0.5 ° C.) Do not reach.

Time achieved routine (step S _53, Figure 7) and the measurement time of the running timer 12 reaches the set time T (time T ₃ of FIG. 4), this routine is completed, the target temperature (set temperature +0 is changed to .5 ° C.) (step S ₅₄ of FIG. 5), the process proceeds to the temperature achieved routine (step S ₅₅ of FIG. 5).

This routine also consists of a series of operations shown in FIG. 6, and is repeated until the room temperature reaches the target temperature (= set temperature 0.5 ° C.). Then, when the room temperature reaches the (set temperature + 0.5 ° C.), that is, the target temperature in this case (time T _{4 in} FIG. ₄ ),
In the control routine of the indoor fan 15 (step S _63), the eighth
The step S _82, S ₈₃ of FIG., The indoor fan 15 so as mode is changed to the weak wind from breeze, discomfort due to the room temperature has risen is removed.

Further, in FIG. 6, (step S ₆₄₎ and the room temperature reaches the target temperature, if the measurement time of the timer 12 has elapsed the set time (step S _65), in Figure 5, the temperature achieved routine (step _S55 ) ends. That is,
Temperature achieved routine of step S ₅₅ is provided to room temperature reaches the target temperature (= setting temperature + 0.5 ° C.),
When room temperature within the measurement time of the timer 12 does not reach the set time T has reached to the target temperature, it terminates the temperature achieved routine step S ₅₅ and waits for the measurement time is the set time T. This is to prevent a change in the room temperature or a change in the wind speed of the air flow from being accelerated more than a certain degree during the refreshing operation.

In Figure 5, the temperature achieved routine step S ₅₅ as described above is completed (time t ₄ in FIG. 4), then is lowered to the target temperature again (set temperature + 0.25 ° C.) (step S _56), proceed to the next time achieve routine (step S _57).

This routine also consists of a series of operations shown in FIG.
In this case, since the target temperature was lowered from (set temperature + 0.5 ° C.) to (set temperature + 0.25 ° C.) (time t _{4 in} FIG. ₄ ),
As shown in FIG. 4 (b), the rotation speed of the compressor 16 is increased to increase the cooling effect, and as shown in FIG. 4 (a), the room temperature decreases (step S in FIG. 7). ₇₂ ). And
Figure 4 time t ₅ at configuration time measured by the timer 12 the time T
And is reached (step S ₇₄ of FIG. 7), the time achieved routine step S ₅₇ in FIG. 5 is completed, the flow returns to step S ₅₀ through step S _58. Again the target temperature in the step S ₅₀ becomes the set temperature, the process proceeds to step S ₅₁ consisting of a series of operations shown in Figure 6.

During the execution of the temperature achieved routine of FIG. 5 time achieving routine step S ₅₇ or step S _51,, i.e.,
During the period in which the room temperature reaches the set temperature from the time t4 in FIG. ₄ , the room temperature always becomes (room temperature + 0.25 ° C.) or less, but at that time (time t4 in FIG. ₄ ), the step in FIG. the step S _81, S ₈₄ of FIG. 8 in step S ₇₃ of S ₆₃ or FIG. 7, switched breeze from the weak wind indoor fan 15, to eliminate the feeling of peel cold due to a reduction in room temperature.

Here, In summary, the time t ₂ ~t ₃ of FIG. 4 is an operation period of the step S _52, S ₅₃ of FIG. 5, of FIG. 4 time t ₃ ~t ₄ of FIG. 5 operation period of step S _54, S _55, fourth
Step S _56, the operation period of the S ₅₇ of the time t ₄ ~t ₅ of FIG. FIG. 5, the time t ₅ ~t ₆ of FIG. 4 is an operation period of the step S _50, S ₅₁ of FIG. 5, When the start operation until the fourth diagram of time described previously t ₂ is finished, is Kaee repeated series of operations described above, refreshing button 23 of FIG. 1 is operated until a stop command (FIG. 5 step S ₅₈₎ refreshing operation of is continued.

Although the refreshing operation is performed as described above, the wind direction motor 17 may be operated during the refreshing operation, and the wind direction may be changed at the same time.

〔The invention's effect〕

As described above, according to the present invention, the control unit repeatedly changes the target temperature and the rotation speed of the indoor fan with the passage of time, so that the comfortable feeling can be maintained not intermittently. For example, in the case of the cooling operation, while raising and lowering the room temperature, a weak wind is sent when the room temperature rises, and a breeze is sent when the room temperature falls, so that a comfortable feeling when the room temperature falls can be obtained, and the room temperature can be reduced. The unpleasant sensation at the time of rising can be eliminated by the weak wind, and the skin chill can be removed by switching from the weak wind at the time of lowering the room temperature to the breeze, so that the comfortable feeling can always be maintained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the air conditioner according to the present invention, FIG. 2 is a flow chart showing the operation of the remote control device in FIG. 1, and FIG. FIG. 4 is a timing chart showing the refreshing operation of the air conditioner body, FIG. 5 is a flowchart showing the refreshing operation routine in FIG. 3 in detail, and FIG. 5 is a flow chart showing a specific example of a temperature achieving routine in FIG. 5, FIG. 7 is a flowchart showing a specific example of a time achieving routine in FIG. 5, and FIG. 8 is an indoor fan control routine in FIG. 6 and FIG. FIG. 9 is a flow chart showing a specific example, FIG. 9 is a diagram showing a cooling operation in a conventional air conditioner and its effect, and FIG. 10 is a diagram showing a cooling mode of the air conditioner according to the present invention in a cooling mode. Wayaka illustrates operation and its effect. DESCRIPTION OF SYMBOLS 1 ... Air conditioner main body, 2 ... Remote control device, 10 ... Control part, 11 ... Calculation part, 12 ... Timer, 13 ...
... room temperature detector, 14 ... receiver, 15 ... room fan, 16 ...
... compressor, 23 ... refreshing buttons.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazunari Minami 5-1-134 Nakagawa, Adachi-ku, Tokyo Inside the Home Appliances Division, Hitachi, Ltd. (72) Koichi Seki 5-1-1 Nakagawa, Adachi-ku, Tokyo No. 34 Inside the Home Appliances Business Division of Hitachi, Ltd. (56) References JP-A-3-156242 (JP, A) JP-A-56-72715 (JP, A) JP-A-3-55452 (JP, A) (58) ) Field surveyed (Int.Cl. ⁶ , DB name) F24F 11/02

Claims (6)

(57) [Claims] A room temperature detecting unit for detecting a room temperature, an indoor fan for sending an airflow into a room, a control unit for setting a set temperature for obtaining a desired room temperature, and a control unit for setting a set temperature for the control unit. An air conditioner provided with a compressor controlled in accordance with the set temperature, wherein the control unit sets a target temperature with respect to the indoor temperature that changes within a temperature range determined according to the set temperature of a predetermined temperature range during a cooling operation. A first means for performing a period from when the room temperature detected by the room temperature detecting unit reaches the upper limit of the temperature range to when the room temperature detected by the room temperature detecting unit drops to a predetermined temperature determined according to the set temperature in the temperature range during the cooling operation. And a second means for increasing the rotation speed of the indoor fan, wherein the target temperature and the rotation speed of the indoor fan are repeatedly changed over time. 2. The air conditioner according to claim 1, wherein the change of the target temperature by the first means is an alternating repetition of a stepwise rise and a stepwise fall. 3. The air conditioner according to claim 1, wherein a change width of the target temperature is made narrower than a change width of the indoor temperature due to an airflow from the indoor fan. 4. The air conditioner according to claim 3, wherein the variation range of the target temperature is 0.5 ° C. 5. The room according to claim 2, wherein the first means sets a room temperature detected by the room temperature detection section when the target temperature is a lower limit or an upper limit of the temperature range. Waiting for the temperature to reach the target temperature, changing the target temperature stepwise, and when the target temperature is not the lower limit or the upper limit of the temperature range, the target temperature is changed with the elapse of a preset time. An air conditioner characterized by being operated. 6. The air conditioner according to claim 1, wherein the second means is configured to reduce a wind speed of the airflow when a room temperature detected by the room temperature detecting section becomes higher than a first predetermined value. An air conditioner, wherein when the room temperature detected by the room temperature detection unit becomes lower than a second predetermined value lower than a first predetermined value, the wind speed of the airflow is reduced.