JP3801268B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner having a humidity adjusting function.
[0002]
[Prior art]
Conventionally, as an air conditioner capable of dehumidifying operation, a method of performing cooling operation with a reduced air volume of an indoor unit (simple method), an indoor heat exchanger divided into a cooler and a heater, or an indoor heat exchanger A system (reheating system) in which an electric heater is provided downstream and the humidity and temperature of blown air are simultaneously adjusted is known.
[0003]
As a control method, as disclosed in, for example, Japanese Patent Application Laid-Open No. 61-59134, an automatic temperature control unit that uses an indoor temperature detection unit and an indoor humidity detection unit to control the temperature to a temperature arbitrarily set by the temperature setting unit. Although there is an operation control method, the detection information from the indoor humidity detection means is only used for ON / OFF of the dehumidification operation.
[0004]
On the other hand, Japanese Patent Application Laid-Open No. 8-86494 discloses a technique in which various dehumidifying operation modes can be selected so that the air conditioner can be used for various applications. . This application includes a dehumidifying operation mode (hereinafter referred to as “Landry” mode) in which the laundry can be dried dry so that the laundry can be dried indoors, Dehumidification operation mode (hereinafter referred to as “outing” mode) that can prevent the occurrence of mold and mold, for example, dew condensation on windows and walls can be removed in winter This is an operation mode (hereinafter referred to as “dew condensation suppression” mode).
[0005]
Here, the “Landry” mode operates the compressor continuously and increases the wind speed of the indoor fan to reduce the humidity as much as possible. The “Outing” mode sets the humidity to “Standard”. In the same manner as in the mode, the wind speed of the indoor fan is reduced. In the “dew condensation suppression” mode, the compressor is continuously operated and the wind speed of the indoor fan is weakened.
[0006]
[Problems to be solved by the invention]
In the conventional air conditioner, normally, as described in JP-A-61-59134, the temperature can be arbitrarily set, but the humidity of the user cannot be arbitrarily set. In general, air conditioners, especially small air conditioners, have many simple dehumidification functions such as cooling operation with reduced air volume, and sufficient dehumidification performance cannot be obtained. It was not possible.
[0007]
Moreover, in the air conditioner described in the above-mentioned JP-A-8-86494, it is possible to select and set various dehumidifying operation modes, and a dehumidifying ability that is normally used (hereinafter referred to as “standard” dehumidifying ability, For example, the humidity is set to be lower than the humidity (in this case, 50%) obtained in the dehumidifying operation mode (hereinafter referred to as “standard” mode) in the dehumidifying capacity where the humidity is 50%) However, the above-mentioned “Landry” mode, “Odekake” mode, and “Condensation suppression” mode allow the air conditioner to be used in a special way. In an environment where the machine performs dehumidifying operation, the user cannot spend comfortably.
[0008]
On the other hand, a sufficient amount of dehumidification can be obtained with the adoption of the reheat method, etc. and the need for comfort is increasing, and more precise and detailed humidity control according to the user's wish is required. Has come to be.
[0009]
In order to meet such needs, an object of the present invention is to provide an air conditioner in which humidity can be adjusted according to user's preference as well as temperature adjustment, and a more comfortable air-conditioning environment can be formed. It is in.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention further adds a “standard” dehumidifying capability and a “strong” dehumidifying capability that lowers the humidity below the “standard” dehumidifying capability as dehumidifying capability in the dehumidifying operation mode, It has a “moderate” dehumidification capability that makes the humidity higher than the “standard” dehumidification capability, and can be set cyclically in the order of “standard” dehumidification capability, “strong” dehumidification capability, and “moderate” dehumidification capability Provide means to do.
[0011]
Such dehumidifying capacity can be arbitrarily selected and set as appropriate with one operating means, and the “standard” dehumidifying capacity is automatically set at the start of the dehumidifying operation, and the operating means is operated after the dehumidifying operation is started. it makes Ru can be selected and set arbitrary dehumidification capacity.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
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 and its operating device, wherein 1 is an air conditioner body, 2 is a remote controller (operating device: hereinafter referred to as remote control), and 3 is a microcomputer. (Hereinafter referred to as a microcomputer) 4 is a receiving circuit, 5 is a room temperature detector, 6 is a humidity detector, 7 is an indoor fan motor, 8 is an outdoor fan motor, 9 is a compressor, 10 is a CPU (central processing unit), 11 is a storage unit, 12 is a power supply, 13 is a microcomputer, 14 is a dehumidification button, 15 is an operation / stop button, 16 is a timer button, 17 is a display unit, 18 is a transmission circuit, 19 is a battery, 20 is a CPU, and 21 is It is a storage unit.
[0014]
In the figure, an air conditioner body 1 has a microcomputer 3 that performs various controls of the air conditioner as a center, a receiving circuit 4 that receives a signal from a remote controller 2, a room temperature detector 5 that detects a room temperature, and a room humidity. It comprises a humidity detector 6 to be detected, an indoor fan motor 7, an outdoor fan motor 8, a compressor 9, and the like, and power is supplied from a power source 12.
[0015]
The microcomputer 3 includes a CPU 10 and a storage unit 11 that stores information such as temperature, humidity, wind speed, and operation time set by the remote controller 2. Further, the humidity detector 6 may be of any system such as a humidity sensor or a system that calculates the humidity from a temperature of the air and the heat exchanger according to a predetermined calculation formula.
[0016]
The remote controller 2 has a control microcomputer 13 as a center, a dehumidifying button 14 for selecting a dehumidifying operation mode, an operation / stop button 15 for operating or stopping the operation, and a set time according to a user's request. The timer button 16 which can be changed, the display part 17 which displays the setting content, the transmission circuit 18 which sends a signal to the air conditioner main body 1, and the battery 19 which supplies electric power to the remote control 2 itself are comprised.
[0017]
The microcomputer 13 includes a CPU 20 and a storage unit 21 that stores preset operation mode information.
[0018]
Note that an operation mode button for setting a cooling and heating operation that is normally provided, a button for setting a temperature, and the like are omitted.
[0019]
In this embodiment, the cooling, heating, and dehumidifying operations may be possible, or only the cooling and dehumidifying operations may be possible. Furthermore, in addition to these operations, it may have a humidification and ventilation function, and the operation and functions are not limited.
[0020]
Here, as the dehumidifying function, a dehumidifying capacity that can secure a sufficient dehumidifying amount is required to enable humidity control. In addition, a reheat dehumidification function that can adjust the temperature of the air blown from the air conditioner body 1 is desirable. Of course, even a simple system may be used as long as the room temperature can be controlled by other means.
[0021]
Note that the cooling operation and the heating operation are performed in the same manner as a normal air conditioner, and therefore, the description thereof is omitted here.
[0022]
The dehumidifying operation is started by pressing the dehumidifying button 14 of the remote controller 2. Here, in order to simplify the explanation, a dedicated dehumidifying button 14 is provided, but it can also be used as another operation button.
[0023]
Here, the dehumidifying button 14 has two functions. One of them is a function for starting the dehumidifying operation, and the other is a function for switching the dehumidifying ability. When the dehumidifying button 14 is pressed while the operation is stopped, the dehumidifying operation is started with a specific dehumidifying capacity (here, the set humidity is set to, for example, “standard” dehumidifying capacity of 50%). Each time the dehumidifying button 14 is pressed, the dehumidifying capacity is set in the order of “strong” dehumidifying capacity that sets the set humidity to 40%, for example, “moderate” dehumidifying capacity that sets the set humidity to 60%, for example, and “standard” dehumidifying capacity. Ability switches cyclically.
[0024]
The setting of the dehumidifying capacity by such an operation is performed as follows.
That is, when the dehumidifying button 14 is pressed in the remote controller 2, the set humidity is obtained by the CPU 20 of the microcomputer 13 in consideration of the set humidity just before that, which is data stored in the storage unit 21 of the microcomputer 13. The data representing the dehumidifying capacity for this is displayed on the display unit 17, and information on the set humidity is transmitted from the transmission circuit 18 to the air conditioner body 1. In the air conditioner main body 1, this information is received by the receiving circuit 4, and the CPU 10 of the microcomputer 3 confirms the humidity in the room by the humidity detector 6, and the dehumidifying operation is performed with the dehumidifying capacity corresponding to the set humidity based on the received information. To do.
[0025]
At this time, the room temperature is set by another means, or the microcomputer 3 in the air conditioner body 1 or the microcomputer 13 in the remote controller 2 automatically sets an appropriate set temperature based on the surrounding environmental conditions and the set humidity. Calculate by calculating.
[0026]
In this way, the air conditioner main body 1 can perform multi-stage switching of humidity as well as temperature, and performs a dehumidifying operation with a dehumidifying capacity according to the set humidity and the set temperature.
[0027]
The operation / stop button 15 is used when starting an operation other than the dehumidifying operation such as heating and cooling operation and when stopping all the operations. When it is desired to start the dehumidifying operation, the dehumidifying button 14 is pressed, and when it is desired to stop the dehumidifying operation, the operating / stop button 15 is pressed.
[0028]
FIG. 2 is an external view showing a front portion provided with the operation unit and display unit 17 of the remote controller 2 in FIG. 1, and parts corresponding to those in FIG.
[0029]
In the figure, the dehumidifying button 14 is provided on the front surface of the remote controller 2, and here, it is assumed that it is described as “dehumidifying”.
[0030]
Further, the display unit 17 shows all display contents displayed here, and actually, only those corresponding to the operation mode at that time are displayed.
[0031]
The display contents of “standard”, “strong”, and “warm” shown in the upper right portion of the display unit 17 represent the dehumidifying ability set by operating the dehumidifying button 14 during the dehumidifying operation. When the dehumidifying button 14 is pressed to start the dehumidifying operation, the dehumidifying operation shown in the upper right part of the display unit 17 is displayed and the dehumidifying operation is started, and the dehumidifying set at this time is set as described above. Since the capability is “standard” dehumidifying capability, “standard” is displayed in the upper right portion of the display unit 17. During the dehumidifying operation, every time the dehumidifying button 14 is pressed, the dehumidifying capacity is switched as described above, and accordingly, the dehumidifying capacity is displayed in the order of “strong”, “restraint”, “standard” and cyclically. Is changed.
[0032]
FIG. 3 is a flowchart showing the dehumidifying operation, and FIG. 4 is a diagram showing a display example on the display unit 17 in such an operation.
[0033]
3, when the air conditioner body 1 (FIG. 1) is in a stopped state and the dehumidifying button 14 of the remote controller 2 (FIG. 2) is pressed (step 100), the dehumidifying operation is started (step 101). “Standard” dehumidification is set, and characters “standard” indicating the set dehumidification are displayed on the display unit 17 of the remote controller 2 as shown in FIG. This state continues as long as the operation / stop button 15 is not pressed (step 103), and continues as long as the dehumidification button 14 is not pressed (step 104).
[0034]
Thereafter, when the dehumidification button 14 is pressed (step 104), the set dehumidification shifts to “strong”, and the switched set dehumidification is displayed on the display unit 17 of the remote controller 2 as shown in FIG. 4B. The word “strong” is displayed (step 105). This state continues as long as the run / stop button 15 is not pressed (step 106), and continues as long as the dehumidification button 14 is not pressed (step 107).
[0035]
After that, when the dehumidifying button 14 is pressed again (step 107), the set dehumidification shifts to “suppression”, and the switched set dehumidification is displayed on the display unit 17 of the remote controller 2 as shown in FIG. The text “Ojime” is displayed (step 108). This state continues as long as the run / stop button 15 is not pressed (step 109), and continues as long as the dehumidification button 14 is not pressed (step 110).
[0036]
After that, when the dehumidifying button 14 is pressed again (step 110), the set dehumidification shifts to “standard”, and the switched set dehumidification is displayed on the display unit 17 of the remote controller 2 as shown in FIG. 4A. Is displayed (step 102).
[0037]
Similarly, as long as the dehumidifying operation continues, every time the dehumidifying button 14 is pressed, the set dehumidifying shifts in the order of “standard”, “strong”, and “repress” and cyclically.
[0038]
Thus, in this embodiment, since each humidity can be set, at the start of the dehumidifying operation, the dehumidifying capacity is set to “standard” with the set humidity being 50%, but this “standard” dehumidifying capacity is set. In dehumidifying operation, for example, when there are many people in the room or people move around and the humidity is felt high and comfort is impaired, or when going out of the dehumidifying operation and going home, sweating If the user feels dehumidification, such as when he / she feels depressing, pressing the dehumidification switch 14 switches the dehumidifying capacity to “strong” and shifts to a dehumidifying operation where the set humidity is 40%. When the dehumidifying operation with the dehumidifying capacity is performed, if the room feels too dry or if it is desired to reduce the power consumption when performing the dehumidifying operation for a long time, the dehumidifying switch 14 is pressed twice. Yo , Switched dehumidification ability to "Me holding", the process proceeds to the dehumidifying operation to 60% of the set humidity, it is possible to selectively use the dehumidification capacity in accordance with the preference of the user.
[0039]
As described above, the set humidity (dehumidification capability) can be switched and changed by operating the dehumidification button 14, but, of course, the order of changing the set humidity is not limited to this. Furthermore, the expression of the dehumidifying ability is not limited to “standard”, “strong”, and “reducing” as described above, but other expressions such as the set humidity value, that is, “standard” is “50%”. And “strong” may be expressed as “40%”, “restraint” may be expressed as “60%”, and so on.
[0040]
If the area used is not comparatively hot and humid, the combination of “Standard” and “Suppress” simplifies the selection operation and prevents unnecessary dehumidifying operation due to erroneous selection, thereby reducing power consumption. It is possible to prevent wasteful use.
[0041]
FIG. 5 is a diagram showing the temperature distribution in the room in the dehumidifying operation and the normal cooling operation. FIG. 5A shows the dehumidifying operation with the “standard” dehumidifying capability, and FIG. Indicates the time of normal cooling operation, both of which are when the set temperature is set to 28 ° C. automatically or by another means.
[0042]
As is clear by comparing FIGS. 5A and 5B, in the dehumidifying operation, the portion of the air flow blown out from the air outlet of the air conditioner body is slightly lower than the set temperature. Although it is 27 ° C lower by 1 ° C, the set temperature is 28 ° C as a whole, but in the case of normal cooling operation, the cold and heavy air blown out from the outlet of the air conditioner body is on the floor It can be seen that there is a large temperature difference between the floor portion and the upper portion. For this reason, people feel that their feet are cold, and comfort is impaired.
[0043]
Of course, when the temperature is sufficiently high, such as in summer, the room can be cooled appropriately by cooling operation, which can provide a comfortable indoor environment. A comfortable indoor environment can be obtained.
[0044]
Each dehumidifying capacity in the above dehumidifying operation is “standard”, “strong”, and “squeezed” are the rotation speed and operating rate of the compressor forming the refrigeration cycle (ratio of compressor operating time per unit time). ) Are set differently.
[0045]
FIG. 6 is a diagram showing a dehumidifying operation mode of the second embodiment of the air conditioner according to the present invention, and this second embodiment also has the same configuration as FIG.
[0046]
In the same figure, the dehumidifying operation mode in this embodiment is a mode classified as a difference in the use of the air conditioner in addition to the mode according to the difference in the dehumidifying ability in the first embodiment, that is, “Landry”. , “Odekake”, and “Rule control” are added, and each time the dehumidifying button 14 (FIG. 1) is pressed, the six modes are switched in the direction of the arrow. Other than this, the second embodiment is the same as the first embodiment described above.
[0047]
Such a dehumidifying operation mode is based on the result of a survey of user needs as shown in FIG. In other words, the “Landry” mode satisfies the user's need to dry laundry in the room by using the dehumidifying function of the air conditioner. Satisfies the needs of users who want to dry mites and suppress the growth of mites and molds, and the “Condensation Control” mode is for users who want to prevent condensation that occurs on windowpanes in the winter. Is satisfied.
[0048]
FIG. 8 is a diagram showing conditions in the dehumidifying operation mode due to such a situation.
[0049]
In the figure, the “standard” mode is a dehumidifying operation mode with the “standard” dehumidifying capacity set at the start of the previous operation. As described above, the set humidity is 50%, and the set temperature is the start of operation. This mode continues unless the room temperature at that time and the wind speed of the indoor fan are weakened to switch to another mode and the operation is not stopped. The dehumidifying operation of each of the “strong” and “moderate” dehumidifying capacities is the same as the dehumidifying operating mode with the “standard” dehumidifying capacities only by changing the set humidity and the wind speed of the indoor fan.
[0050]
In the “Landry” mode, the set temperature is the room temperature at the start of operation, but the compressor is continuously rotated so that the humidity is as low as possible, and the wind speed of the indoor fan is also strong. The operation time in this mode is limited to 3 hours here in consideration of the drying time of the laundry. When this operation time has elapsed, the dehumidifying operation is stopped.
[0051]
In the “outing” mode, the set temperature is approximately 50%, and the set temperature is the outside air temperature. In addition, this mode continues unless the wind speed of the indoor fan is reduced and the mode is switched to another mode, or unless the operation is stopped.
[0052]
In the “dew condensation suppression” mode, the compressor is continuously rotated while ignoring the temperature, the humidity is made as low as possible, and the wind speed of the indoor fan is weakened. The operation time in this mode is limited to 2 hours here in consideration of the time when condensation does not occur and the fact that the operation is continued indefinitely, the cooling state continues. Also in this mode, the dehumidifying operation is stopped when this operation time has elapsed.
[0053]
As described above, according to the second embodiment, it is possible to switch the humidity to obtain a comfortable indoor environment, and to prevent the air conditioner from drying clothes, mites and molds. It can also be used for applications such as indoor drying and air drying to suppress condensation, and it is possible to easily select and set these modes simply by operating the same dehumidifying switch 14.
[0054]
FIG. 9 is an external view showing a third embodiment of the air conditioner according to the present invention, in which 22 is a humidifying unit, and parts corresponding to those in FIG.
[0055]
In the same figure, this 3rd Embodiment combined the humidification unit 22 which can be drive | operated in conjunction with this air conditioner main body 1 with the air conditioner main body 1 of previous 1st or 2nd embodiment. Is. The humidifying unit 22 operates in response to a command from the air conditioner body 1 or a remote controller (not shown) during the dehumidifying operation.
[0056]
That is, for example, when the user depresses the dehumidifying switch 14 (FIG. 1) in a very dry period such as in winter, the dehumidifying operation start mode of the “standard” dehumidifying capability is entered. Lower than the standard humidity setting of the dehumidifying capacity At this time, the microcomputer 3 (FIG. 1) operates the humidifying unit 22 to increase the humidity. When the humidity increases and exceeds the set humidity, the humidifying unit 22 is stopped and the compressor is rotated. The air conditioner body 1 starts the dehumidifying operation. When dehumidification is performed and the humidity becomes lower than the set humidity, the humidifying unit 22 starts to operate and the compressor of the air conditioner main body 1 is stopped. In the following, the set humidity is maintained. A dehumidifying operation is performed. The same applies to the dehumidifying operation of each of the “strong” and “moderate” dehumidifying capabilities.
[0057]
In general, it is considered that humidity is not adjusted by humidification in areas with a humid climate like Japan, but there are still cases where it becomes dry and low humidity on the Pacific side in winter. In such a case, the combination of the air conditioner body 1 and the humidifying unit 22 is effective as described above.
[0058]
In this third embodiment, the humidifying function is provided in a separate unit, but of course, this may be integrated into the air conditioner body or combined with the humidifying function as shown in FIG. It goes without saying that the humidity can be set by the remote controller 2 as well.
[0059]
FIG. 10 is a configuration diagram showing a specific example of the refrigeration cycle in the air conditioner main body 1 described above, in which 23 is a four-way valve, 24 is an outdoor heat exchanger, 25 is an electric expansion valve, and 26 is indoor heat. An exchanger, 26a is a heating side, 26b is a cooling side, 27 is a dehumidifying expansion valve, and 28 is a refrigerant pipe, and parts corresponding to those in FIG.
[0060]
This specific example is a reheating method based on a refrigeration cycle capable of ensuring a sufficient dehumidification amount and adjusting the temperature of blown air.
[0061]
10, in this refrigeration cycle, a compressor 9, a four-way valve 23, an outdoor heat exchanger 24, an electric expansion valve 25, and an indoor heat exchanger 26 are sequentially connected by a refrigerant pipe 28. The indoor heat exchanger 26 is divided into a heating side 26a and a cooling side 26b in a refrigeration cycle by a dehumidifying expansion valve 27.
[0062]
Here, the heat exchanger is assumed to be a so-called cross fin tube type heat exchanger composed of copper pipes laminated with a plurality of thin aluminum plates and penetrated at right angles to the aluminum plates. The same applies to heat exchange of the form. The electric expansion valve 25 and the dehumidifying expansion valve 27 are valves capable of adjusting the throttling action and operate as follows.
[0063]
That is, during the cooling or heating operation, the dehumidifying expansion valve 27 is fully opened (the degree that does not cause the throttling action or the throttling action is at a minimum), and the electric expansion valve 25 has a throttling amount appropriate for cooling or heating. At this time, the indoor heat exchanger 26 acts as one evaporator or condenser on the refrigeration cycle.
[0064]
Conversely, during the dehumidifying operation, the electric expansion valve 25 is fully opened, and the dehumidifying expansion valve 27 is set to an appropriate throttle amount for the dehumidifying operation. The refrigerant is condensed on the heating side 26a of the indoor heat exchanger 26 to heat the air, and is evaporated on the cooling side 26b of the indoor heat exchanger 26 to cool the air. Thereby, dehumidification is performed. And these two air is mixed and sent out indoors, and indoor temperature and humidity are adjusted. In this case, the amount of dehumidification and the temperature of the blown air are adjusted by the rotational speed of the compressor 9, the rotational speed of the outdoor fan (not shown), the rotational speed of the indoor fan, the degree of throttling of the dehumidifying expansion valve 27, and the like. be able to.
[0065]
【The invention's effect】
As described above, according to the present invention, the indoor humidity as well as the indoor temperature can be set according to the user's preference, the indoor situation, the necessity of reducing power consumption, etc. It is possible to obtain a comfortable indoor environment even if it is a thing, and it is possible to perform a dehumidifying operation that can obtain an effect of reducing power consumption without losing comfort in continuous use for a long time. Become.
[0066]
Such switching of the indoor humidity is also possible by operating one operating means, and a predetermined set humidity is set by the first operation of the operating means, and from this predetermined set humidity every time the operating means is operated, Since the set humidity can be cyclically switched in the order of the set humidity lower than the predetermined set humidity and the set humidity higher than the predetermined set humidity, an indoor environment according to the user's preference can be easily obtained. Can be.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a first embodiment of an air conditioner according to the present invention and its operating device.
2 is an external view showing a front portion provided with an operation unit and a display unit of the remote controller in FIG. 1; FIG.
FIG. 3 is a flowchart showing an operation for a dehumidifying operation of the embodiment shown in FIG. 1;
4 is a diagram showing a display example on the display unit of the remote controller shown in FIG. 2 in the dehumidifying operation shown in FIG. 3;
FIG. 5 is a diagram showing a temperature distribution in a room in a dehumidifying operation and a cooling operation.
FIG. 6 is a diagram showing each mode of dehumidifying operation and switching order thereof in the second embodiment of the air conditioner according to the present invention.
7 is a diagram showing the contents of each mode related to the application shown in FIG. 6. FIG.
8 is a diagram showing operating conditions in each mode related to the application shown in FIG.
FIG. 9 is an external view showing another embodiment of the air conditioner according to the present invention.
FIG. 10 is a configuration diagram showing a specific example of a refrigeration cycle in an air conditioner according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air conditioner body 2 Remote control 3 Microcomputer 4 Reception circuit 5 Room temperature detector 6 Humidity detector 7 Indoor fan motor 8 Outdoor fan motor 9 Compressor 10 CPU
DESCRIPTION OF SYMBOLS 11 Memory | storage part 12 Power supply 13 Microcomputer 14 Dehumidification button 15 Run / stop button 16 Timer button 17 Display part 18 Transmission circuit 19 Battery 20 CPU
DESCRIPTION OF SYMBOLS 21 Memory | storage part 22 Humidification unit 23 Four-way valve 24 Outdoor heat exchanger 25 Electric expansion valve 26 Indoor side heat exchanger 26a Heating side 26b of indoor side heat exchanger Cooling side 27 of indoor side heat exchanger 27 Dehumidification expansion valve 28 Refrigerant Piping

Claims (1)

In an air conditioner comprising an indoor heat exchanger having a heat exchanger part that heats during a dehumidifying operation and a heat exchanger part that cools, and at least a dehumidifying operation mode,
The dehumidifying operation mode includes a first dehumidifying operation mode having a predetermined set humidity, a second dehumidifying operation mode having a set humidity lower than the predetermined set humidity, and a first dehumidifying operation mode having a set humidity higher than the predetermined set humidity. 3. A dehumidifying button is provided that enables setting of the dehumidifying operation mode of 3.
At the start of the dehumidifying operation mode by the operation of the dehumidifying button from the operation stop state , the first dehumidifying operation mode is initially set, and each time the dehumidifying button is operated, the initial setting of the first dehumidifying operating mode is performed. An air conditioner configured to be cyclically switchable in the order of the second dehumidifying operation mode, the third dehumidifying operating mode, and the first dehumidifying operating mode.

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