JP2020020558A - Air conditioner - Google Patents

Abstract

To provide an air conditioner capable of shortening an arrival time to a target room temperature at the time of air-warming startup while preventing a user from having a so-called draft feeling at the time of air-warming startup.SOLUTION: An air conditioner includes a compressor 12, an indoor fan 22, an indoor heat exchanger 20, a heat exchange temperature sensor 26 for detecting a heat exchange temperature that is a temperature of a refrigerant in the indoor heat exchanger, an outdoor heat exchanger 14 and a control section 8. The control section 8 includes a small air volume mode and a large air volume mode at the time of air-warming startup. When an indoor temperature B at the time of air-warming startup is less than a first temperature B1, the control section 8 executes the small air volume mode. When an indoor heat exchange temperature C is within a range from a second temperature C2 to a third temperature C3, which is set based on a person skin temperature, in an increasing process from the air-warming startup, the control section executes the large air volume mode.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an air conditioner.

  BACKGROUND ART Conventionally, for example, an air conditioner as disclosed in Patent Document 1 has been known. This air conditioner stops the indoor fan until the pressure of the refrigerant sent from the compression mechanism to the indoor heat exchanger at the time of heating activation reaches a predetermined high pressure threshold. Thereby, the time until the pressure of the refrigerant becomes high is shortened, and the time until the temperature of the refrigerant becomes high is shortened. The air conditioner also selectively performs indoor heat exchange temperature control for stopping an indoor fan until the temperature of the refrigerant passing through the indoor heat exchanger reaches a predetermined heat exchange temperature when heating is started.

JP 2010-261698 A

However, when the conventional air conditioner as shown in Patent Literature 1 intends to quickly supply warm air at the time of heating start, a wind lower than the skin temperature of the user hits the user at the time of heating start, so that the user's There is a problem in that the user feels unpleasant, that is, a so-called draft feeling, as the perceived temperature drops.
On the other hand, in order to prevent this draft feeling from being caused to the user, when controlling the indoor fan to have an air flow according to the heat exchange temperature, when the indoor temperature at the time of heating activation is relatively low, The heat exchange temperature is also relatively low, the air flow of the indoor fan is low, and the time to reach the target room temperature at the time of starting heating is relatively long.

  Therefore, the present invention provides a method of starting heating while reducing the user's perceived temperature by causing the user to feel uncomfortable, that is, making the user feel uncomfortable, because a wind lower than the skin temperature of the user hits the user at the time of starting heating. It aims to shorten the time required to reach the target room temperature at the time.

In order to solve the above-described problems, the present invention provides a compressor that compresses a refrigerant, an indoor fan that blows air into a room, and an indoor heat exchanger that exchanges heat between the refrigerant and air blown by the room fan. A room temperature detection unit that detects an indoor temperature, a heat exchange temperature detection unit that detects a heat exchange temperature in the indoor heat exchanger, an outdoor heat exchanger that exchanges heat between the outside air and the refrigerant, and the indoor fan. A control unit for controlling the control unit, the control unit includes a small air volume mode for blowing a predetermined small air volume from the indoor fan at the time of heating activation and a large air volume mode for blowing a predetermined large air volume from the indoor fan, Executes the small air volume mode when the indoor temperature at the time of starting heating is lower than the first temperature, and then determines the heat exchange temperature based on the skin temperature of a person in a rising process from the time of starting heating. When in the set second temperature in the range of up to the third temperature, it is characterized by performing the air volume mode.
In the present invention configured as described above, the control unit executes the small air volume mode when the room temperature at the time of starting heating is lower than the first temperature, and then sets the heat exchange temperature from the time of starting heating. When the temperature is within the range from the second temperature to the third temperature set based on the skin temperature of the person in the rising process of the above, the large air volume mode is executed. As a result, when the air that is lower than the user's skin temperature hits the user at the time of heating activation, the user's perceived temperature decreases and the user feels uncomfortable. The time to reach room temperature can be shortened.

In the present invention, it is preferable that the control unit further includes a step in which the heat exchange temperature reaches the third temperature after the heat exchange temperature reaches the second temperature in a rising process from the start of heating. And a rotation speed non-decreasing mode for controlling the rotation speed of the indoor fan so as not to decrease.
In the present invention configured as described above, the control unit further controls the heat exchange temperature until the heat exchange temperature reaches the third temperature after the heat exchange temperature reaches the second temperature in the rising process from the start of heating. A rotation speed non-decreasing mode for controlling the rotation speed of the indoor fan not to decrease is provided. Thereby, even after the heat exchange temperature reaches the second temperature in the rising process from the time of starting the heating, even if the heat exchange temperature falls below the second temperature, the supply of a large air volume is maintained by the indoor fan, It is possible to further shorten the time required to reach the target room temperature when heating is started.

In the present invention, preferably, the first temperature is set within a range of 8 ° C to 12 ° C.
In the present invention configured as described above, when the room temperature B is lower than the first temperature set in the range of 8 ° C. to 12 ° C., the heating is started by executing the small air volume mode, the large air volume mode, or the like. Sometimes, when a wind lower than the user's skin temperature hits the user, the user's perceived temperature drops and the user feels uncomfortable. Can be shortened.

In the present invention, preferably, the second temperature is set within a range of 28 ° C to 33 ° C.
In the present invention configured as described above, the second temperature can be set in a range of 28 ° C to 33 ° C, which is set based on a human skin temperature corresponding to a relatively low room temperature. . This makes it difficult for the user to experience a so-called draft feeling that the user's perceived temperature drops and the user feels uncomfortable when wind that is lower than the user's skin temperature hits the user at the time of heating startup, but the target at the time of heating startup The time to reach room temperature can be shortened.

In the present invention, preferably, the third temperature is set within a range of 36 ° C to 40 ° C.
In the present invention configured as described above, the third temperature can be set in a range of 36 ° C to 40 ° C, which is set based on the skin temperature of the person corresponding to the comparatively high indoor temperature. . Accordingly, when the heat exchange temperature is not higher than the third temperature, the control unit does not increase the heat exchange temperature so as to exceed the upper limit of the skin temperature assumed by the user. Thus, it can be determined that the room temperature can be further increased.

  ADVANTAGE OF THE INVENTION According to the air conditioner of this invention, the wind which is lower than a user's skin temperature hits a user at the time of a heating start, and a user's bodily sensation temperature falls and feels uncomfortable. Also, it is possible to shorten the time required to reach the target room temperature when heating is started.

It is a schematic structure figure of an air conditioner by one embodiment of the present invention. 5 is a flowchart illustrating control performed when the air conditioner according to the embodiment of the present invention starts heating. It is a diagram which shows the relationship between the air volume at the time of heating start by the air conditioner by one Embodiment of this invention, and a heating at the time of a heating start, room temperature, heat exchanger temperature, and time, respectively.

Hereinafter, an air conditioner according to an embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a schematic configuration diagram of an air conditioner according to an embodiment of the present invention.
The air conditioner 1 includes an outdoor unit 2 provided outdoors, an indoor unit 4 provided in a room to be heated, and a refrigerant pipe 6 connecting the outdoor unit 2 and the indoor unit 4 and circulating a refrigerant. . Further, the air conditioner 1 includes a control device 8 for controlling the outdoor unit 2 and the indoor unit 4, and a remote control switch 10 operated by a user.

  The outdoor unit 2 includes a compressor 12 that compresses a refrigerant, an outdoor heat exchanger 14, an expansion valve 16 that decompresses the refrigerant, and an outdoor fan 18 that sucks outside air from outside. The outdoor heat exchanger 14 exchanges heat between the outside air introduced by the outdoor fan 18 and the refrigerant.

The indoor unit 4 includes an indoor heat exchanger 20 for exchanging heat between the refrigerant and the indoor air, an indoor fan 22 for blowing out the air heat-exchanged indoors, and an indoor temperature sensor as a room temperature detecting unit for detecting the indoor indoor temperature. 24, and a heat exchange temperature sensor 26 that detects a heat exchange temperature based on the temperature of the refrigerant in the indoor heat exchanger 20. This heat exchange temperature sensor 26 is attached to the outer surface of the refrigerant pipe 6. The heat exchange temperature sensor 26 detects a heat exchange temperature corresponding to the temperature of the refrigerant in a portion where the refrigerant mainly becomes a two-phase region in the indoor heat exchanger 20. Since there is a correlation between the heat exchange temperature and the outlet temperature of the outlet of the indoor unit 4, an outlet temperature detection sensor is provided at the outlet of the indoor unit 4 instead of the heat exchange temperature sensor 26, Similar control may be performed by estimating the heat exchange temperature from the blowing temperature detected by the detection sensor or from the blowing temperature.
The compressor 12, the indoor heat exchanger 20, the expansion valve 16, and the outdoor heat exchanger 14 are connected by the above-described refrigerant pipe 6, and constitute a refrigeration cycle.

  The user can set the target room temperature by using the remote control switch 10 described above. Here, the target room temperature is, for example, a target room temperature at the center of the room.

  The control device 8 is electrically connected to, for example, the compressor 12, the outdoor fan 18, and the expansion valve 16 of the outdoor unit 2, the indoor fan 22, the indoor temperature sensor 24, the heat exchange temperature sensor 26, and the remote control switch 10 of the indoor unit 4. ing. The control device 8 includes a CPU, a memory, and the like disposed on a substrate, and is a device that is electrically connected based on a predetermined control program stored in the memory, a command signal received from the remote control switch 10, and the like. Can be controlled.

When the room temperature B at the time of starting heating is lower than 10 ° C. (first temperature B1), the control device 8 sets the indoor heat exchange temperature C based on the temperature of the skin of a person in the process of rising from the time of starting heating. When the temperature is within the range of 32 ° C. (second temperature C2) to 38 ° C. (third temperature C3), the indoor fan 22 is driven at a rotation speed corresponding to the large air volume setting, and a large air volume mode at the time of starting heating is provided. . Here, the above-mentioned 10 ° C. (first temperature B1) may be in the range of 8 ° C. to 12 ° C., and 32 ° C. (second temperature C2) may be in the range of 28 ° C. to 33 ° C. 38 ° C. (third temperature C3) may be a temperature in the range of 36 ° C. to 40 ° C.
The large air volume setting is set at the stage of the air volume of the highest level in the setting range from the small air volume to the large air volume of the air volume A (see FIG. 3) of the air blown from the indoor unit 4. Note that the large air volume setting does not necessarily need to be the maximum air volume that can be blown out, and may be set to an air volume within a certain range including the largest level of air volume. For example, the large air volume setting is set as the stage with the largest air volume among the three or five setting ranges from the small air volume to the large air volume. The large air volume setting is set as a large air volume corresponding to the output of the air conditioner 1, and a large air volume corresponding to an output of 3.5 kW is, for example, 11 [m ³ / min], and a large air volume corresponding to an output of 5 kW. Is, for example, 13 [m ³ / min].

If the room temperature B at the time of starting heating is lower than 10 ° C. (first temperature B1), the control device 8 further sets the indoor heat exchange temperature C to 32 ° C. (second temperature) during the rising process from the time of starting heating. Until C2) is reached, a small air volume mode at the time of starting heating is provided in which the indoor fan 22 is driven at a rotation speed corresponding to the small air volume setting. The small air volume setting is set to the stage of the air volume of the smallest level in the setting range from the small air volume to the large air volume of the air volume A (see FIG. 3) of the air blown out from the indoor unit 4. The small air volume setting does not necessarily need to be the lowest air volume that can be blown out, and may be set to an air volume within a certain range including the lowest level air volume. For example, the small air volume setting is set as a stage with the smallest air volume in a three-stage or five-stage setting range from a small air volume to a large air volume.
The controller 8 further sets the indoor heat exchange temperature C to 38 ° C. (third temperature C3) after the indoor heat exchange temperature C reaches 32 ° C. (second temperature C2) in the rising process from the start of heating. A rotation speed non-decreasing mode is provided to control the rotation speed of the indoor fan 22 so as not to decrease until the rotation speed reaches the rotation speed.

  The control device 8 further reduces the rotation speed of the indoor fan 22 when the indoor heat exchange temperature C decreases, and decreases the rotation speed of the indoor fan 22 when the indoor heat exchange temperature C increases. An air flow control mode corresponding to the heat exchange temperature to be increased is provided.

  Next, control contents at the time of starting heating of the air conditioner according to the embodiment of the present invention will be described with reference to FIG. In FIG. 2, S indicates each step.

  As shown in FIG. 2, first, in S1, the user operates the remote control switch 10 to transmit a heating operation command to the control device 8, and starts the heating operation of the air conditioner 1.

Next, the process proceeds to S2, where it is determined whether or not the room temperature B at the time of starting heating is lower than 10 ° C. (first temperature B1). If the room temperature B is not less than 10 ° C., the room temperature B of the living room is relatively high, and it can be determined that the environment can heat the center of the room to the target room temperature relatively quickly by the heat exchange temperature corresponding air volume control mode. To execute a heat exchange temperature corresponding control mode in which an air flow corresponding to a normal heat exchange temperature is blown out.
When the room temperature B is lower than 10 ° C., the control device 8 sets the room temperature B of the living room to a relatively low temperature of lower than 10 ° C. By executing the large air volume mode or the like, it is possible to determine that the environment can heat the center of the room to the target room temperature earlier than by executing the air flow control mode corresponding to the heat exchange temperature.

Next, proceeding to S3, the control device 8 executes the above-described heating start-time small air volume mode.
Next, in S4, it is determined whether or not the indoor heat exchange temperature C is equal to or higher than 32 ° C. (second temperature C2) set based on the skin temperature of the person (user) in the rising process from the time of starting heating. judge. 32 ° C. (second temperature C2) is set as a human skin temperature in a low-temperature environment where the room temperature B is lower than 10 ° C.

  When it is determined that the indoor heat exchange temperature C is not equal to or higher than 32 ° C. (the second temperature C2), the process returns to S3, and the execution of the small air volume mode at the time of heating start is continued.

  If it is determined in S4 that the indoor heat exchange temperature C is equal to or higher than 32 ° C. (the second temperature C2), the process proceeds to S5.

  In S5, when it is determined that the indoor heat exchange temperature C is equal to or higher than 32 ° C. (the second temperature C2), the control device 8 executes the above-described heating start-time large air volume mode.

Next, in S6, the control device 8 executes the rotation speed non-decreasing mode in parallel with the start of the heating start-time large air volume mode.
By executing the rotation speed non-decreasing mode, even if the indoor heat exchange temperature C falls below 32 ° C. (second temperature C2), the air volume blown from the indoor unit 4 is maintained at the large air volume A2, and the indoor temperature B And the time required to reach the target room temperature when heating is started is further reduced.

  Next, proceeding to S7, the control device 8 determines whether or not the indoor heat exchange temperature C is higher than 38 ° C. (third temperature C3) set based on the human skin temperature in the rising process from the start of heating. Is determined. 38 ° C. (third temperature C3) is the assumed upper limit skin temperature of a person in an environment where the room temperature B is higher than the temperature at the time of starting heating and is equal to or lower than the target room temperature.

When the indoor heat exchange temperature C is not higher than 38 ° C. (third temperature C3), that is, when the indoor heat exchange temperature C is equal to or lower than 38 ° C., the indoor heat exchange temperature C is still the upper limit of the skin temperature assumed by the user. , And it can be determined that the room temperature B can be further increased by the large air volume mode at the time of heating activation, and the process returns to S5.
When it is determined that the indoor heat exchange temperature C is higher than 38 ° C. (the third temperature C3), the control device 8 proceeds to S8. In S8, since the indoor heat exchange temperature C has risen to a level exceeding the assumed upper limit skin temperature of the user, the normal heat exchange temperature corresponding air volume control mode is executed.

Next, with reference to FIG. 2 and FIG. 3, the relationship between the air volume, the indoor temperature, the heat exchanger temperature and the time at the time of starting heating by the air conditioner according to the embodiment of the present invention and the air conditioner of the comparative example will be described.
In S1 of FIG. 2, the user starts the heating operation of the air conditioner 1. The start time (start time) of the heating operation of the air conditioner 1 is indicated by time t0 in FIG. The room temperature B at the time t0 is the room temperature B0, and the room heat exchange temperature C is almost the same as the room temperature B0. The room temperature B0 is a relatively low temperature of less than 10 ° C.

  The control device 8 executes the heating start small air volume mode in S3. When the indoor heat exchange temperature C rises to the predetermined temperature C1 at time t1, the indoor fan 22 is started. Since the indoor fan 22 is rotated at a rotation speed corresponding to the small air volume setting, the indoor air with the small air volume A1 is blown into the room from the indoor unit 4. After time t1, the indoor heat exchange temperature C continues to rise. The control device 8 continues the small air volume operation even if the indoor heat exchange temperature C rises, and maintains the indoor fan 22 at a rotation speed corresponding to the small air volume setting. Since only the small amount of air A1 is blown out from the indoor unit 4, the indoor temperature B in the room is the room temperature B0 from time t1 to time t2 described later, and is substantially constant.

The control device 8 proceeds to S4 and determines whether or not the indoor heat exchange temperature C is equal to or higher than 32 ° C. (second temperature C2). When it is determined that the indoor heat exchange temperature C is not equal to or higher than 32 ° C., the indoor heat exchange temperature C has not yet reached the human skin temperature, and if the air volume is increased, the skin temperature of the user will increase. Since it is determined that the lower wind hits the user during heating, the user's perceived temperature may drop and the user may feel uncomfortable, that is, a so-called draft feeling, and the process returns to S3.
In S4, if it is determined that the indoor heat exchange temperature C is equal to or higher than 32 ° C., the indoor heat exchange temperature C has reached the skin temperature of the user, and even if the air volume is increased, Since it is determined that the wind higher than the skin temperature of the user hits the user at the time of heating and it is difficult for the user to generate a so-called draft feeling, the process proceeds to S5.

  In S5, the indoor fan 22 is raised from the rotation speed a1 corresponding to the small airflow setting to the rotation speed a2 corresponding to the large airflow setting. Since the indoor fan 22 is rotated at the rotation speed a2, the indoor unit 4 blows the inside air having the large air volume A2 into the room. After time t2, the indoor heat exchange temperature C temporarily drops below the second temperature C2.

  In S6, the control device 8 executes the rotation speed non-decreasing mode after the time t2, so that the indoor heat exchange temperature C reaches 32 ° C. in the rising process from the time of starting the heating, and thereafter, the indoor heat exchange temperature C becomes lower. Until the temperature reaches 38 ° C., control is performed so that the rotation speed of the indoor fan 22 is not reduced. Therefore, even if the indoor heat exchange temperature C falls below the second temperature C2, the control device 8 maintains the rotational speed of the indoor fan 22 at the rotational speed a2 without lowering. Therefore, even if the indoor heat exchange temperature C falls below the second temperature C2, the air volume blown out from the indoor unit 4 is maintained at the large air volume A2, and the increase in the indoor temperature B is promoted. Shorten the arrival time. After the time t2, the indoor unit 4 continuously blows the inside air with the large air volume A2, so that the indoor temperature B in the room greatly increases from the time t2 and continues to increase. As described above, the control device 8 proceeds to S7 in a state where the large air volume mode at the time of heating start and the rotation speed non-decreasing mode are executed.

  In S7, when it is determined that the indoor heat exchange temperature C becomes higher than 38 ° C. at the time t3, the control device 8 ends the execution of the heating start-up large air volume mode and the rotation speed non-decreasing mode, and performs the heat exchange temperature correspondence. The execution of the air volume control mode is started. At time t3, the rotation speed of the indoor fan 22 is slightly increased from the rotation speed a2 to the rotation speed a3 based on the indoor heat exchange temperature C in the air flow control mode corresponding to the heat exchange temperature. Since the indoor fan 22 is rotated at the rotation speed a3, the indoor unit 4 blows the inside air having the large air volume A3 into the room. After time t3, the indoor heat exchange temperature C continues to rise slightly, but the fluctuation width is reduced and stabilized. After the time t3, the rotation speed of the indoor fan 22 is substantially constant at the rotation speed a3 corresponding to the indoor heat exchange temperature C.

Next, as a comparative example, with reference to FIG. 3, heating is started under the same conditions as the present invention (the heating operation is started at room temperature B0 and time t0), and the air flow control corresponding to the heat exchange temperature is started from the time of starting the heating. The following describes the lapse of time of the air volume, the room temperature, and the heat exchanger temperature from the start of heating when the mode is executed.
First, when the heating operation of the air conditioner 1 is started, the control device 8 executes a heat exchange temperature corresponding air volume control mode. The start time of the heating operation of the air conditioner 1 is indicated by time t0 in FIG. At the time t0, the room temperature B in the room is the room temperature B0, and the room heat exchange temperature C is almost the same as the room temperature. The control device 8 activates the indoor fan 22 from time t1 as soon as the preparation for the start of heating is completed, for example, as soon as the indoor heat exchange temperature C rises to the predetermined temperature C1, and executes the air flow control mode corresponding to the heat exchange temperature.

After the time t1, in the air flow control mode corresponding to the heat exchange temperature, as the indoor heat exchange temperature C increases after the time t1, the rotation speed of the indoor fan 22 is increased stepwise from a1. Along with this, the room temperature B also gradually rises. Since the rotation speed of the indoor fan 22 is increased stepwise with respect to the rise of the indoor heat exchange temperature C, the rotation speed of the indoor fan 22 is a1 from time t1 to t2.
In the comparative example, the total air volume blown from the indoor unit 4 from time t1 to time t3 is smaller than the total air volume A blown from the indoor unit 4 from time t1 to time t3 in the present embodiment. I have. Therefore, in both the comparative example and the present embodiment, even when the indoor heat exchange temperature C becomes close to the third temperature C3 at the time t3, the indoor temperature B3 ′ of the comparative example is a value lower than the indoor temperature B3 of the present embodiment. It has become.

  According to the air conditioner 1 according to the embodiment of the present invention described above, the control device 8 executes the small air volume mode when the indoor temperature at the time of heating activation is lower than the first temperature, and then executes the indoor operation. When the heat exchange temperature C is within the range from the second temperature C2 to the third temperature C3 set based on the skin temperature of the person in the rising process from the start of heating, the large air volume mode is executed. As a result, the wind at a temperature lower than the user's skin temperature hits the user at the time of heating activation, and the user's perceived temperature drops. The time to reach room temperature can be shortened.

  Furthermore, according to the air conditioner 1 according to one embodiment of the present invention, the control device 8 further controls the indoor heat exchange temperature after the indoor heat exchange temperature C reaches the second temperature C2 in the rising process from the time of starting heating. Until the exchange temperature C reaches the third temperature C3, a rotation speed non-decreasing mode for controlling the rotation speed of the indoor fan 22 not to decrease is provided. As a result, even if the indoor heat exchange temperature C falls below the second temperature C2 after the indoor heat exchange temperature C reaches the second temperature C2 in the rising process from the start of heating, the indoor fan 22 increases the temperature. The supply of the air volume can be maintained, and the time to reach the target room temperature at the time of starting heating can be further reduced.

  Furthermore, according to the air conditioner 1 according to the embodiment of the present invention, when the room temperature B is lower than the first temperature set in the range of 8 ° C to 12 ° C, the small air volume mode, the large air volume mode, and the like. As a result, the user's perceived temperature decreases due to the wind that is lower than the user's skin temperature hitting the user at the time of heating startup, and the user feels uncomfortable. The time to reach the target room temperature can be shortened.

  Furthermore, according to the air conditioner 1 according to one embodiment of the present invention, the second temperature C2 is in a range of 28 ° C to 33 ° C, which is set based on a human skin temperature corresponding to a relatively low room temperature B. Can be set within As a result, the wind at a temperature lower than the user's skin temperature hits the user at the time of heating activation, and the user's perceived temperature drops. The time to reach room temperature can be shortened.

  Furthermore, according to the air conditioner 1 according to one embodiment of the present invention, the third temperature C3 is in a range of 36 ° C to 40 ° C set based on the skin temperature of a person corresponding to the comparatively high indoor temperature B. Can be set within Accordingly, when the indoor heat exchange temperature C is not higher than the third temperature C3, the control device 8 increases such that the indoor heat exchange temperature C still exceeds the upper limit of the skin temperature assumed by the user. In other words, it can be determined that the room temperature B can be further increased by the large air volume mode at the time of heating start.

DESCRIPTION OF SYMBOLS 1 Air conditioner 12 Compressor 14 Outdoor heat exchanger 20 Indoor heat exchanger 22 Indoor fan B1 First temperature C Heat exchange temperature C2 Second temperature C3 Third temperature

Claims (5)

A compressor for compressing the refrigerant,
An indoor fan that blows air into the room,
An indoor heat exchanger that exchanges heat between the refrigerant and air blown out by the indoor fan,
A room temperature detecting unit for detecting an indoor temperature;
A heat exchange temperature detection unit that detects a heat exchange temperature in the indoor heat exchanger,
An outdoor heat exchanger that exchanges heat between the outside air and the refrigerant,
A control unit for controlling the indoor fan,
The control unit includes a small air volume mode for blowing a predetermined small air volume from the indoor fan at the time of heating activation and a large air volume mode for blowing a predetermined large air volume from the indoor fan,
The control unit executes the small air volume mode when the indoor temperature at the time of starting heating is lower than the first temperature, and then, in a process of increasing the heat exchange temperature from the start of heating, the human skin An air conditioner that executes the large air volume mode when the temperature is within a range from a second temperature to a third temperature set based on a temperature.   The control unit further controls the number of rotations of the indoor fan after the heat exchange temperature reaches the second temperature in a process of rising from the time of heating activation until the heat exchange temperature reaches the third temperature. The air conditioner according to claim 1, further comprising a rotation speed non-decreasing mode for controlling so as not to reduce the rotation speed.   The air conditioner according to claim 1, wherein the first temperature is set within a range of 8 ° C. to 12 ° C. 4.   4. The air conditioner according to claim 1, wherein the second temperature is set in a range from 28 ° C. to 33 ° C. 5.   The air conditioner according to any one of claims 1 to 4, wherein the third temperature is set within a range of 36C to 40C.

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