JPH08193742A - Air conditioner - Google Patents

Abstract

PURPOSE: To cause a humidity within a room to reach a target humidity in a short time by a method wherein a dehumidifying mode operation is started when it is judged that an air conditioning operation is stopped and a temperature within the room is higher than an upper limit of' a range of predetermined range. CONSTITUTION: In the case that an automatic drying operation start mode is set under a condition in which an operation of an air conditioner is stopped, the automatic drying operation start mode is set by a method wherein an instruction button for instructing the automatic drying operation start mode in a remote controller, for example, is depressed and an operation signal of the automatic drying operation start mode is received through a receiving circuit 76. In the case that the drying operation start mode has been set in this way, a main routine is started to perform the operation and then the room humidity is inputted from a humidity sensor 80c. A setting range of the set humidity under the drying mode is 40 to 60%, for example. Then, the operation starting humidity is a higher humidity than the upper limit of the setting range of the set humidity under the dry mode and 70%, for example.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, it operates in an operation mode including a dehumidifying mode for controlling indoor humidity to a preset humidity to condition indoor air. Regarding air conditioners.

[0002]

2. Description of the Related Art A conventional air conditioner is provided with an indoor heat exchanger for exchanging heat with a refrigerant, an outdoor heat exchanger for exchanging heat with the refrigerant, and a four-way valve for switching the circulation direction of the refrigerant. Therefore, the cooling mode and the dry mode are performed as follows.

That is, in the cooling mode, the four-way valve of the air conditioner is switched so that the refrigerant discharged from the compressor circulates in the order of the outdoor heat exchanger, the capillary tube, the indoor heat exchanger and the compressor, The outdoor heat exchanger condenses the refrigerant, the indoor heat exchanger evaporates the refrigerant, and the room is cooled so that the room temperature reaches the set temperature (set temperature). When the temperature falls to the set temperature, the operation is stopped.

In the dry mode, the compressor is operated with the minimum capacity in the same refrigerating cycle as in the cooling mode, the rotation speed of the fan is set to a low speed (for example, weak), and the fan is intermittently operated. The indoor dehumidification is performed so that the indoor humidity becomes a preset humidity (set humidity), and the operation is stopped when the indoor humidity drops to the set humidity.

[0005]

However, when the indoor humidity is high as in the rainy season, in the above-described air conditioner, the dry mode operation must be started from a high humidity condition in the room. There is a problem that it takes a long time for the humidity to reach the set humidity.

Further, in the above-mentioned air conditioner, when the operation in the cooling mode is performed and the indoor temperature reaches the desired temperature, the operation may be stopped, but the indoor temperature reaches the desired temperature. Even if the operation in the cooling mode is stopped, the indoor humidity does not reach the humidity that the user feels comfortable. Therefore, the user has to newly instruct the dry mode after the operation in the cooling mode is completed, and there is a problem that the operability of switching the operation modes is poor.

An object of the present invention is to provide an air conditioner which solves the above problems.

[0008]

To achieve the above object, the invention according to claim 1 operates in an operation mode including a dehumidification mode for controlling the indoor humidity to a preset humidity within a predetermined humidity range. An air conditioner that harmonizes indoor air, wherein humidity detecting means for detecting indoor humidity, operation stop determining means for determining whether or not operation is stopped, and operation stop by the operation stop determining means Humidity determination means for determining whether the detected humidity is higher than the upper limit of the predetermined humidity range when it is determined that, the humidity detected by the humidity determination means is within the predetermined humidity range. A control means for starting the operation in the dehumidifying mode when it is determined that the temperature is higher than the upper limit.

According to a second aspect of the present invention, a plurality of dehumidification modes are provided for controlling the indoor humidity to a preset humidity within a predetermined humidity range and a cooling mode for controlling the indoor temperature to the preset temperature. An air conditioner that operates in any of the operation modes to condition the air in the room, the humidity detecting means for detecting the indoor humidity, and the operation stop determining means for determining whether or not the operation is stopped. A humidity determining means for determining whether the detected humidity is higher than an upper limit of the predetermined humidity range when the operation stop determining means determines that the operation is stopped; and the humidity determining means. A controller that starts operation in the cooling mode when it is determined that the detected humidity is higher than the upper limit of the predetermined humidity range.

According to a third aspect of the present invention, any one of a plurality of operation modes including a dehumidifying mode for controlling the indoor humidity to a preset humidity setting and a cooling mode for controlling the indoor temperature to the preset temperature setting. An air conditioner that operates in the air conditioner to harmonize the indoor air, comprising switching means for switching the operating mode to the dehumidifying mode when the indoor temperature reaches the set temperature by the operation in the cooling mode. .

According to a fourth aspect of the present invention, there are provided a plurality of dehumidifying modes for controlling the indoor humidity to a preset humidity within a predetermined humidity range and a cooling mode for controlling the indoor temperature to the preset temperature. An air conditioner that operates in any of the operation modes to condition the air in the room, the humidity detecting means for detecting the indoor humidity, and the operation stop determining means for determining whether or not the operation is stopped. A humidity determining means for determining whether the detected humidity is higher than an upper limit of the predetermined humidity range when the operation stop determining means determines that the operation is stopped; and the humidity determining means. When it is determined that the detected humidity is higher than the upper limit of the predetermined humidity range, control means for starting the operation in the cooling mode, and the temperature in the room to the set temperature by the operation in the cooling mode. The operating mode comprises a switching means for switching to the dehumidification mode when it has reached.

[0012]

The air conditioner according to the first aspect of the present invention operates in the operation mode to condition the indoor air. This operation mode includes a dehumidification mode that controls the indoor humidity to a preset humidity within a predetermined humidity range. The predetermined humidity range is, for example, 40 [%] to 60 [%].

The humidity detecting means detects the indoor humidity.
The humidity detecting means detects the humidity in the room even when the air conditioner is operating in the operation mode or when the operation is stopped.

The operation stop judging means judges whether the operation is stopped. The humidity determining means determines that the operation is stopped by the operation stop determining means, and the humidity detected by the humidity detecting means is higher than the upper limit of the predetermined humidity range, that is, 60% in the above example. Determine whether or not. Incidentally, by setting a humidity higher than the upper limit of the predetermined humidity range in advance, the humidity judging means judges that the operation is stopped by the operation stop judging means, and the detected humidity is within the predetermined humidity range set in advance. It may be determined whether or not the humidity is higher than the upper limit.

Then, the control means starts the operation in the dehumidifying mode when the humidity determining means determines that the humidity detected by the humidity detecting means is higher than the upper limit of the predetermined humidity range.

In this way, when the operation is stopped and it is determined that the indoor humidity is higher than the upper limit of the predetermined humidity range, the operation in the dehumidifying mode is started, so that the indoor humidity is set higher than the upper limit of the predetermined humidity range. It is possible to prevent the indoor humidity from becoming higher, and thus it is possible to maintain the indoor humidity near the upper limit of the predetermined humidity range, so that the indoor humidity can be shortened to the preset humidity within the predetermined humidity range. You can reach the time.

The air conditioner according to the second aspect of the present invention operates in the operation mode to condition the indoor air. This operation mode includes a dehumidification mode similar to the first aspect of the invention and a cooling mode for controlling the room temperature to the set temperature.

According to the present invention, the humidity detecting means detects the indoor humidity as in the case of the first aspect of the invention. The humidity detecting means detects the humidity in the room even when the air conditioner is operating in the operation mode or when the operation is stopped.

The operation stop judging means judges whether the operation is stopped. The humidity determining means determines whether or not the operation is determined to be stopped by the operation stop determining means, and the humidity detected by the humidity detecting means is higher than the upper limit of the predetermined humidity range. As in the case of the first aspect of the present invention, a humidity higher than the upper limit of the predetermined humidity range is set in advance, and the humidity determination means is determined to have been stopped by the operation stop determination means, and is detected. It may be possible to determine whether or not the humidity is higher than the upper limit of the preset predetermined humidity range.

Then, the control means starts the operation in the cooling mode when the humidity determining means determines that the humidity detected by the humidity detecting means is higher than the upper limit of the predetermined humidity range.

Here, when it is determined that the indoor humidity is higher than the upper limit of the predetermined humidity range, the reason why the operation in the cooling mode is started is that the dehumidification can be performed even in the operation in the cooling mode. Because.

As described above, when the operation is stopped and it is determined that the indoor humidity is higher than the upper limit of the predetermined humidity range, the cooling mode operation is started, and the dehumidification can be performed even in the cooling mode operation. From this, it is possible to prevent the indoor humidity from becoming higher than the upper limit of the predetermined humidity range, and thus it is possible to maintain the indoor humidity near the upper limit of the predetermined humidity range.

The air conditioner according to the third aspect of the present invention operates in any one of a plurality of operation modes to condition the indoor air. This operation mode includes a dehumidification mode and a cooling mode. The dehumidifying mode of the present invention is a mode for controlling the indoor humidity to a preset set humidity, and the cooling mode is a mode for controlling the indoor temperature to the set preset temperature.

As described above, the dehumidification can be performed even in the cooling mode operation. However, even if the room temperature reaches the set temperature by the cooling mode operation, the indoor humidity is set. It is common that the set temperature has not been reached.

Therefore, in the present invention, the switching means switches the operation mode to the dehumidification mode when the temperature in the room reaches the set temperature by the operation in the cooling mode.

The operation in the cooling mode is started manually or by setting, for example, by a remote controller.

As described above, when the operation in the cooling mode is started by setting the operation in the cooling mode and the temperature in the room reaches the set temperature, the operation mode is switched to the dehumidifying mode, and the humidity in the room is set to the preset humidity set in advance. By controlling the operation in the cooling mode from the cooling mode to the dehumidification mode, it is possible to control the indoor temperature to the set temperature and the indoor humidity to the set humidity. improves.

An air conditioner according to a fourth aspect of the present invention operates in an operation mode to condition indoor air. This operation mode includes the dehumidification mode and the cooling mode similar to those of the invention of claim 2.

According to the present invention, the humidity detecting means detects the indoor humidity as in the second aspect of the invention. The humidity detecting means detects the humidity in the room even when the air conditioner is operating in the operation mode or when the operation is stopped.

The operation stop judging means judges whether the operation is stopped. The humidity determining means determines whether or not the operation is determined to be stopped by the operation stop determining means, and the humidity detected by the humidity detecting means is higher than the upper limit of the predetermined humidity range. As in the second aspect of the present invention, a humidity higher than the upper limit of the predetermined humidity range is set in advance, and the humidity determination means is determined to have been stopped by the operation stop determination means, and is detected. It may be possible to determine whether or not the humidity is higher than the upper limit of the preset predetermined humidity range.

The control means starts the operation in the cooling mode when the humidity determining means determines that the humidity detected by the humidity detecting means is higher than the upper limit of the predetermined humidity range.

The switching means switches the operation mode to the dehumidification mode when the temperature in the room reaches the set temperature due to the operation in the cooling mode.

As described above, when the operation is stopped and it is determined that the indoor humidity is higher than the upper limit of the predetermined humidity range, the operation in the cooling mode is started, and the dehumidification can be performed even in the operation in the cooling mode. In addition, the present invention switches the operation mode to the dehumidification mode when the room temperature reaches the set temperature,
Since the indoor humidity is controlled to a preset humidity setting, the indoor temperature can be set to the set temperature and the indoor humidity can be set by setting the cooling mode operation without switching from the cooling mode to the dehumidifying mode. Can be controlled to
And the operability is improved.

[0034]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1, the air conditioner (air conditioner) of this embodiment includes an indoor unit 10 and an outdoor unit 12.
And an indoor unit 10 and an outdoor unit 1
A coolant circulation passage for circulating a coolant and a hot water circulation passage for circulating hot water are provided in the above.

The indoor unit 10 is provided with an indoor heat exchanger 16 arranged in the air passage of a single unit so that the evaporator in the refrigeration cycle is located above the radiator to which hot water is supplied. Has been. The evaporator comprises a refrigerant coil,
The refrigerant flowing in the refrigerant coil is evaporated to perform heat exchange. Further, the radiator includes a hot water coil, and heat is exchanged by the hot water flowing in the hot water coil. A fan driven by a fan motor 70E, which will be described later, is provided near the indoor heat exchanger 16 to blow air through the indoor heat exchanger 16.

The evaporator of the indoor heat exchanger 16 is connected to the valve 20 of the outdoor unit 12 via the refrigerant pipe 18 composed of a thick pipe. The valve 20 is a muffler 22,
The valve 32 is connected via an accumulator 24, a compressor 26, an outdoor heat exchanger 28 having a refrigerant coil for exchanging heat with the refrigerant flowing in the refrigerant coil, and a capillary tube 30. And the valve 32
However, by being connected to the evaporator of the indoor heat exchanger 16 via the refrigerant pipe 34 formed of a thin tube, a closed refrigerant circulation path, that is, a refrigeration cycle is formed. In addition, in the vicinity of the outdoor heat exchanger 28, a fan motor 112, which will be described later, for passing the outdoor heat exchanger 28 to blow air.
A fan driven by A is provided.

The radiator of the indoor heat exchanger 16 is connected to the hot water inlet nipple 38 of the outdoor unit 12 via the hot water pair tube 36. Hot water inlet nipple 38
Is connected to a hot water outlet nipple 46 via a pressure tank 40 having a pressure cap 41, a pump 42, and a hot water heat exchanger 44. The hot water outlet nipple 46 is connected to the radiator of the indoor heat exchanger 16 via the flow rate variable valve 62 that controls the flow rate of the hot water flowing through the hot water circulation path to form a sealed hot water circulation path. .

The hot water heat exchanger 44 is heated by the gas burner 50 to generate hot water. The pressure tank 40 of the hot water circulation path is connected to the drain tank 52 connected to the drain via the pressure cap 41,
The hot water circulation path is connected to the pressurizing inlet through an injection pipe 56 equipped with a check valve 54, and tap water or the like is injected into the hot water circulation path through the injection pipe 56. Further, the hot water circulation path is connected to a floor mat for floor heating via a branch pipe 60 equipped with a thermal valve 58. Incidentally, 61 is a low temperature thermistor, and 63 is a high temperature thermistor.

In this hot water circulation path, when the water temperature rises and the internal pressure reaches a predetermined value (for example, 0.9 kg / cm ² ) or more, the pressure valve of the pressure cap 41 operates, and hot water flows from the pressure relief port to the drain tank 52. Inflow. On the other hand, when the operation is stopped and the temperature of the hot water drops and the internal pressure of the hot water circulation path drops below a predetermined value, the negative pressure valve operates and the drain tank 5
Hot water is recovered from 2.

FIG. 2 shows an electric circuit of the indoor unit 10. The electric circuit includes a power supply board 70 and a control board 72. The power supply board 70 has a drive circuit 70A connected to a fan motor 70E that adjusts the amount of air supplied to the room, a motor power supply circuit 70B that generates electric power for driving various motors, and electric power for a control circuit. A control circuit power supply circuit 70C and a serial circuit power supply circuit 70D that generates electric power for the serial circuit are provided.

The control board 72 is provided with a serial circuit 72A connected to the serial circuit power supply circuit 70D, a drive circuit 72B for driving the motor, and a microcomputer 72C as a control circuit. The drive circuit 72B includes an upper and lower flap motor 74A, a left and right flap motor 74B, which move the flap up and down.
74C, and a floor sensor motor 74D that rotationally drives a floor sensor that detects the temperature of the floor surface to detect the temperature of the entire floor surface are connected.

Further, the microcomputer 72C has a variable flow rate valve 6
2 is connected, a display LED provided on the display substrate 76 for displaying an operation mode and the like, an optical sensor, a receiving circuit for receiving an operation signal from a remote controller are connected, and further provided on the sensor substrate 78. An area LED for displaying a temperature detection area on the floor and a floor sensor are connected. Further, the microcomputer 72C is connected with a room temperature sensor 80A for detecting room temperature, a heat exchanger temperature sensor 80B for detecting the temperature of the refrigerant coil of the indoor heat exchanger 16, and a humidity sensor 80C for detecting indoor humidity. LED for self-diagnosis provided on the switch board 82,
An operation changeover switch for changing over the operation mode and a self-diagnosis switch are connected. The operation mode switch is provided with an operation mode display, and the current operation mode is displayed by the display LED provided on the display substrate 76. This operation changeover switch can be changed over by remote operation by a remote controller equipped with an operation mode changeover switch (not shown), but can also be changed over manually.

FIG. 3 shows an electric circuit of the outdoor unit 12, which includes a rectifying circuit 100 and a control board 102. The electric circuit of the outdoor unit 12 is connected to the electric circuit of the indoor unit 10 in FIG.

The control board 102 generates electric power for switching the serial circuit 102A connected to the serial circuit power supply circuit 70D of the indoor unit 10, noise filters 102B, 102C, 120D for removing noise, and the inverter 104. A switching power supply circuit 102E and a microcomputer 102F as a control circuit are provided.

An inverter 104 is connected to the switching power supply circuit 102E, and a compressor 106 for compressing a refrigerant is connected to the inverter 104.

The microcomputer 102F controls the switching valve to control the flow rate of gas supplied to the burner, controls the burner combustion degree to control the temperature of hot water, and the burner controller 108 to detect the outside air temperature. Outside air temperature thermistor 110A as an air temperature sensor, outdoor heat exchanger 2
A coil temperature thermistor 110B as a coil temperature sensor for detecting the temperature of the refrigerant coil 8 and a compressor temperature thermistor 110C as a temperature sensor for detecting the temperature of the compressor are connected. Note that 112A is a fan motor, and 112B is a fan motor capacitor.

Next, the operation of this embodiment will be described with reference to the flow chart (see FIG. 4) showing the control routine for the automatic dry start mode.

In this routine, the main power source (1
00 [V]) is input, but the operation of the air conditioner is stopped, the automatic dry start mode is set, or the dry mode operation is stopped, as will be described later. It is executed after a predetermined time has passed from the time (step 130). It should be noted that whether or not the predetermined time has elapsed is determined using a soft timer (not shown).

Here, the automatic dry start mode is set, for example, by pressing an instruction button for the automatic dry start mode of a remote controller (not shown) and receiving an operation signal of the automatic dry start mode via the receiving circuit 76. .

When the automatic dry start mode is set in this way, this routine starts, and in step 122, the humidity in the room is taken in from the humidity sensor 80C, and in step 1
At 24, it is determined whether the taken-in room humidity is higher than the operation start humidity.

Here, in the dry mode described later, the operation is performed so that the indoor humidity becomes a preset set humidity, and the set range of the set humidity in the dry mode is, for example, 40% to 60%. Is. The operation start humidity is higher than the upper limit (60% in the above example) of the set range of the set humidity in the dry mode,
In this embodiment, it is set to 70%. It should be noted that the operation start humidity is not limited to 70% because it may be higher than the upper limit of the set range of the set humidity.

If the taken-in room humidity is higher than the operation start humidity, the affirmative judgment is made in step 124, the dry mode operation is started in step 126, and the room humidity is set in step 128. Humidity [60
[%] (Not limited to this, for example, 55%, 50%, 40% in the set range of the set humidity)
[%] May be used]] It is determined whether or not it is smaller. If the determination in step 124 is negative, this processing ends.

In the dry mode operation, the refrigerant is circulated in the refrigerating cycle and hot water is circulated in the hot water circulation path to radiate the conditioned air cooled and dehumidified by the evaporator. By supplying the conditioned air after reheating with a heater to the room, the indoor humidity is set to the set humidity (60
〔%〕)I have to.

The reason why the conditioned air cooled and dehumidified by the evaporator is reheated by the radiator in this way is supplied to the room for the following reason.
That is, as described above, since the cooling capacity is determined by the rotation speed of the fan, if the fan is intermittently operated at a low speed so that the room temperature does not fall below the set temperature, the room temperature rises and falls depending on the size of the room and the outside air temperature, while the dehumidification In order to do so, the capacity of the compressor cannot be reduced below the minimum capacity, so that the room temperature may decrease from the set temperature by 1 to 2 °, and in some cases about 3 °.

Therefore, in this embodiment, the air cooled and dehumidified by the refrigerant coil of the indoor heat exchanger is warmed by the hot water coil provided in the indoor heat exchanger so as not to fall below the set temperature. .

The refrigerant may simply circulate in the refrigeration cycle described above, and the compressor may be operated with the minimum capacity so that the rotation speed of the fan is low (for example, weak) to intermittently operate the fan. .

Further, fuzzy control of the compressor 26 and fuzzy control of the flow rate variable valve 62 may be performed. That is, in the fuzzy control of the compressor 26, first, the difference between the current humidity and the preset humidity is calculated, and the change amount of this difference per unit time is calculated. Then, the frequency change amount is obtained from the map of the frequency change amount of the compressor 26 which is previously determined by the fuzzy inference rule according to this difference and the change amount of this difference per unit time, and the inverter 104 is controlled to control the compressor 26.
Frequency control. In the fuzzy control of the flow rate variable valve 62, first, the difference between the current room temperature and the preset temperature is calculated, and the change amount of this difference per unit time is calculated. Then, the valve opening / closing change amount is calculated from the map of the valve opening / closing change amount of the flow rate variable valve 62 which is previously determined by the fuzzy inference rule according to the difference and the change amount of the difference per unit time. The variable flow valve 62 is controlled according to the amount of change.

In this way, when the indoor humidity reaches the set humidity by operating in the dry mode, step 128
Is affirmative, and the dry mode operation is stopped in step 130.

As described above, even if the operation of the air conditioner is stopped, the indoor mode is taken in, and when the taken-in humidity is higher than the preset humidity for starting operation, the dry mode is automatically started. However, since the indoor humidity is set to a preset humidity, it is possible to prevent the indoor humidity from becoming higher than the operation start humidity, which allows the indoor humidity to be set in a short time. Can be humidity.

In the embodiment described above, when the operation of the air conditioner is stopped, the indoor humidity is taken in, and when the taken-in humidity is higher than the preset operating humidity, the dry mode is automatically set. Has started,
The present invention is not limited to this, and the cooling mode (details will be described later) may be started instead of the dry mode.

Next, a second embodiment of the present invention will be described.
The configuration of this embodiment is the same as that of the first embodiment described above, and therefore its explanation is omitted.

Next, the operation of this embodiment will be described with reference to the flow chart showing the control routine (see FIG. 5).

This routine is started by receiving the operation signal in which the cooling mode is selected and the set temperature in the room is set from the remote controller through the receiving circuit 76, and in step 142, the room temperature sensor 80A reads the room. Is taken in, and it is determined in step 144 whether the taken-in room temperature is higher than the set temperature. If the determination is negative, the process proceeds to step 150. If the determination is positive, the operation in the cooling mode is started in step 146.

In the cooling mode operation, the refrigeration cycle is controlled so that the refrigerant circulates, the outdoor heat exchanger 28 condenses the refrigerant, and the indoor heat exchanger 16 evaporates the refrigerant. Cool the room.

At this time, fuzzy control of the compressor 26 may be performed. That is, the difference between the present room temperature and the set temperature is calculated, and the change amount of this difference per unit time is calculated. Then, the frequency change amount is obtained from the map of the frequency change amount of the compressor 26 which is previously determined by the fuzzy inference rule according to this difference and the change amount of this difference per unit time, and the inverter is controlled to control the compressor. Perform frequency control.

At the next step 148, it is determined whether the temperature in the room is lower than the set temperature. The operation in the cooling mode is continued until the determination is affirmative, the temperature in the room becomes lower than the set temperature, and when the determination in step 148 is affirmative, the indoor humidity is taken in at step 150, In step 152, it is determined whether or not the indoor humidity is higher than a preset set humidity (for example, 60%). If the determination is negative, the process ends. On the other hand, if the determination is affirmative, step 15
At 4, the dry mode operation is started.

At the next step 156, it is determined whether the indoor humidity is lower than the set humidity. The dry mode operation is continued until the determination is affirmative. When the determination is affirmative, the dry mode operation is stopped in step 158, and the present process is ended.

As described above, after the temperature in the room has reached the set temperature in the operation in the cooling mode, the operation is automatically switched to the dry mode so that the humidity in the room becomes the set humidity. Even if you do not instruct to switch the operation mode from the dry mode to the dry mode, you can set the indoor temperature to the set temperature and the indoor humidity to the set humidity by instructing the cooling mode, improving the operability of switching the operation mode. Can be made.

Next, a third embodiment of the present invention will be described.
Since the configuration of this embodiment is similar to that of the second embodiment, its description is omitted.

Next, the operation of this embodiment will be described with reference to the flow chart showing the control routine (see FIG. 6). Since the operation of this embodiment is substantially the same as that of the second embodiment, The same parts are designated by the same reference numerals, and the description thereof will be omitted.

When it is determined that the room temperature is lower than the set temperature by operating in the cooling mode, the comfortable humidity is fetched from the RAM based on the set temperature in step 149.

Here, the comfortable humidity will be explained. As described above, the preset temperature in the room is set by the remote controller, and the comfortable humidity is determined in advance based on the discomfort index when the temperature in the room is the preset temperature. It is the humidity that a person feels comfortable and is specifically as shown in Table 1 below.

[0073]

[Table 1]

In this embodiment, as shown in Table 1, the comfortable humidity is stored in the RAM (not shown) corresponding to the set temperature.

Then, in step 151, it is judged whether or not the indoor humidity is higher than the comfortable humidity taken in in step 149. If it is judged to be higher, the dry mode operation is started, and in step 155, Determine whether the indoor humidity is lower than the comfortable humidity, until the determination is affirmative,
Continue dry mode operation.

As described above, since the operation mode is automatically switched to the dry mode operation after the indoor temperature reaches the set temperature in the operation in the cooling mode, the operation mode from the cooling mode to the dry mode is changed. Even if you do not instruct to switch, the temperature in the room is set to the set temperature,
The indoor humidity can be made comfortable, and the operability of switching the operation mode can be improved. In addition, in the dry mode, the comfortable humidity that the user feels comfortable at the set temperature is set, so the comfort of the user is also improved.

In the modification of the first embodiment described above, when the operation of the air conditioner is stopped, the indoor humidity is taken in, and the taken-in humidity is higher than the preset humidity and higher than the operation start humidity, Although the cooling mode is automatically started, after starting the cooling mode in this way, step 1 of the control routine shown in FIG.
48 to 158 may be performed, or steps 148 to 158 of the control routine shown in FIG. 6 may be performed.

[0078]

As described above, the invention according to claim 1 starts the operation in the dehumidifying mode when the operation is stopped and it is determined that the indoor humidity is higher than the upper limit of the predetermined humidity range. It is possible to prevent the indoor humidity from becoming higher than the upper limit of the predetermined humidity range, and thus it is possible to maintain the indoor humidity near the upper limit of the predetermined humidity range. It is possible to reach the preset humidity within the range in a short time.
Has the effect.

According to the second aspect of the present invention, when the operation is stopped and it is determined that the indoor humidity is higher than the upper limit of the predetermined humidity range, the cooling mode operation is started, and the dehumidification is performed even in the cooling mode operation. Therefore, it is possible to prevent the indoor humidity from becoming higher than the upper limit of the predetermined humidity range, and thereby, it is possible to maintain the indoor humidity near the upper limit of the predetermined humidity range, and thus the indoor humidity It is possible to reach a preset humidity within a predetermined humidity range in a short time.

According to the third aspect of the invention, when the operation in the cooling mode is started by setting the operation in the cooling mode and the temperature in the room reaches the set temperature, the operation mode is switched to the dehumidification mode and the humidity in the room is preset. Since the set humidity is controlled to the set humidity, the indoor temperature can be controlled to the set temperature and the indoor humidity to the set humidity by setting the operation of the cooling mode without the operation of switching from the cooling mode to the dehumidifying mode. In addition, the operability is improved.

In the invention according to claim 4, when the operation is stopped and it is determined that the indoor humidity is higher than the upper limit of the predetermined humidity range, the operation in the cooling mode is started, and the dehumidification is performed even in the operation in the cooling mode. In addition, in the present invention, when the room temperature reaches the set temperature, the operation mode is switched to the dehumidification mode, and the room humidity is controlled to the preset set humidity. By setting the operation of the cooling mode without the operation of switching to, the indoor temperature can be controlled to the set temperature and the indoor humidity to the set humidity, and the operability is improved.

[Brief description of drawings]

FIG. 1 is a refrigerant and hot water circuit diagram of an air conditioner according to first to third embodiments of the present invention.

FIG. 2 is an electric circuit diagram of an indoor unit of the air conditioner of the above embodiment.

FIG. 3 is an electric circuit diagram of an outdoor unit of the air conditioner of the above embodiment.

FIG. 4 is a flowchart showing a control routine of the first embodiment of the present invention.

FIG. 5 is a flowchart showing a control routine of a second embodiment of the present invention.

FIG. 6 is a flowchart showing a control routine of a third embodiment of the present invention.

[Explanation of symbols]

10 Indoor unit 12 Outdoor unit 72C Microcomputer (operation stop judgment means, humidity judgment means, control means and switching means) 80C Humidity sensor (humidity detection means)

Claims (4)

[Claims] 1. An air conditioner which operates in an operation mode including a dehumidifying mode for controlling the indoor humidity to a preset humidity within a predetermined humidity range to condition the indoor air. Humidity detecting means for detecting, operation stop judging means for judging whether the operation is stopped, and the detected humidity when the operation stop judging means judges that the operation is stopped. Humidity determining means for determining whether the humidity is higher than the upper limit of the humidity range, and when the detected humidity is determined to be higher than the upper limit of the predetermined humidity range, the operation of the dehumidifying mode is started. An air conditioner comprising: 2. One of a plurality of operation modes including a dehumidification mode for controlling the indoor humidity to a preset humidity within a predetermined humidity range and a cooling mode for controlling the indoor temperature to a preset temperature. An air conditioner that operates to harmonize the indoor air, including humidity detection means for detecting indoor humidity, operation stop determination means for determining whether operation is stopped, and operation stop determination Humidity determination means for determining whether the detected humidity is higher than the upper limit of the predetermined humidity range when it is determined that the operation is stopped by means, the humidity detected by the humidity determination means is An air conditioner comprising: a control unit that starts operation in the cooling mode when it is determined that the humidity is higher than the upper limit of the predetermined humidity range. 3. The indoor operation is performed in any one of a plurality of operation modes including a dehumidifying mode for controlling the indoor humidity to a preset set humidity and an air-cooling mode for controlling the indoor temperature to the preset set temperature. An air conditioner for conditioning air, comprising: switching means for switching the operation mode to the dehumidification mode when the temperature in the room reaches the set temperature by the operation in the cooling mode. 4. One of a plurality of operation modes including a dehumidifying mode for controlling the indoor humidity to a preset humidity within a predetermined humidity range and a cooling mode for controlling the indoor temperature to a preset temperature. An air conditioner that operates to harmonize the indoor air, including humidity detection means for detecting indoor humidity, operation stop determination means for determining whether operation is stopped, and operation stop determination Humidity determination means for determining whether the detected humidity is higher than the upper limit of the predetermined humidity range when it is determined that the operation is stopped by means, the humidity detected by the humidity determination means is When it is determined that the temperature is higher than the upper limit of the predetermined humidity range, control means for starting the operation in the cooling mode, and when the temperature in the room reaches the set temperature by the operation in the cooling mode, A switching means for switching the rotation mode to the dehumidification mode, the air conditioner having.