JP2007212079A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of providing comfortable air conditioning in an intermediate period such as rainy season by eliminating feeling of discomfort such as humidity after the rain, while preventing overcooling. <P>SOLUTION: This air conditioner 1 changes a target humidity to a humidity of a conditioned room in operating a switch 58 or before and after the operation, or a humidity lower than the humidity kept in operating the switch 58 by a prescribed value or lower than the same by a prescribed ratio, and changes a target temperature to a temperature of the conditioned room in operating the switch 58 or before and after the operation, a temperature kept in operating the switch 58, or a value after prescribed correction to the temperature. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioner that performs a dehumidifying operation of a conditioned room by an air cooling action by an evaporator and an air heating action by a condenser.

  Conventionally, an air conditioner having a refrigeration cycle composed of, for example, a compressor, a condenser, a decompression device, and an evaporator is used for air conditioning such as cooling and heating in a conditioned room or dehumidification. When performing cooling operation with an air conditioner, the high-temperature and high-pressure refrigerant gas discharged from the compressor is condensed by releasing heat to the outdoor side with an outdoor heat exchanger (condenser), and decompressed with a decompression device. Then, it flows into the indoor heat exchanger (evaporator) where it evaporates and cools the air by cooling the air. The refrigerant that has exchanged heat with the air in the conditioned room passes through a four-way valve that switches the refrigerant flow path, and repeats the cycle of returning to the compressor.

  During the heating operation, the refrigerant flow path is switched by the four-way valve, the indoor heat exchanger acts as a condenser, and the outdoor heat exchanger acts as an evaporator to perform heating. Further, when performing the dehumidifying operation, the same circulation of the refrigerant as in the cooling operation is formed, and a part of the indoor heat exchanger acts as an evaporator and the other part acts as a condenser. When air is cooled by the evaporator, moisture in the air is condensed at the same time to perform dehumidification, and the air after cooling is mixed with the air heated by the condenser, and the dehumidifying operation is performed without changing the temperature in the conditioned room Was done.

On the other hand, an air conditioner has been devised that increases the dehumidifying capacity of the conditioned room by a certain amount. That is, the air conditioner is provided with an operating device having a capacity increasing means, and the air conditioner can increase the dehumidifying capacity in the dehumidifying operation by a certain amount by operating the operating device. It is configured as follows. Thereby, it was comprised so that the humidity in a to-be-conditioned room could be made low, without having to consider various conditions, such as setting temperature at all (refer patent document 1).
Japanese Patent Laid-Open No. 10-61997

  However, the conventional air conditioner has lowered the target humidity when it is felt that the conditioned room is a little sultry, so when a predetermined time elapses in this state, the humidity is lowered and the room temperature is also lowered, so that it can be experienced. It will be too cold. This time, the room temperature that was too low must be restored. For this reason, adjustment of the dehumidification operation of the air conditioner has been troublesome.

  The present invention was made in order to solve the problems of the related art, and eliminates the unpleasant feeling of steaming after the rain while preventing over-cooling, so that air conditioning is comfortable during intermediate periods such as during the rainy season. It aims at providing the air conditioner which can implement | achieve.

That is, the air conditioner of the present invention uses at least a refrigerant compressor, a condenser, a decompression mechanism, an air cooling action by an evaporator in a refrigeration cycle having an evaporator, and an air heating action by a condenser. A dehumidifying function for dehumidifying the room, and controlling the capacity of the refrigerant compressor based on the temperature and target temperature of the conditioned room and / or the humidity and target humidity of the conditioned room, and a predetermined switch In response to the operation, the target humidity is a value lower by a predetermined value than the humidity of the conditioned room when the switch is operated, the humidity of the conditioned room near the operation, or the humidity held in the storage unit when the switch is operated. Alternatively, the target temperature is changed to a value lower by a predetermined ratio, and the target temperature is the temperature of the conditioned room at the time of operating the switch, the temperature of the conditioned room near the time of operating, the temperature held in the storage unit at the time of operating the switch, or these Temperature And changing the temperature of performing a predetermined correction.

  In the air conditioner of the invention of claim 2, in the above, the target humidity, the target temperature, the changed target humidity, and the changed target temperature are any one of a plurality of predetermined values. Features.

  The air conditioner of the invention of claim 3 is the air conditioner according to claim 3, wherein, after the switch is operated, when the switch or a different switch is operated again, the target humidity and the target temperature are not changed by the switch operation. The target humidity and the target temperature, or a humidity or temperature close to them is characterized.

  The air conditioner of the invention of claim 4 uses at least a refrigerant compressor, a condenser, a decompression mechanism, an air cooling action by an evaporator in a refrigeration cycle having an evaporator, and an air heating action by a condenser. Having a dehumidifying function for dehumidifying the conditioned room, and controlling the capacity of the refrigerant compressor based on the temperature and target temperature of the conditioned room and / or the humidity and target humidity of the conditioned room, In response to a predetermined switch operation, the target humidity is set to the humidity of the conditioned room when the switch is operated, the humidity of the conditioned room near the switch operation, or the humidity held in the storage unit when the switch is operated. If the humidity in the conditioned room becomes the target humidity before the change after the predetermined switch operation, the target humidity is changed to the target before the change based on the switch operation. Humidity or Characterized by a value close to target humidity.

  An air conditioner according to a fifth aspect of the invention is characterized in that, in the first to third aspects, when the target humidity is changed, the operating capacity of the refrigerant compressor is increased at the same time.

  An air conditioner according to a sixth aspect of the invention is characterized in that, in the fifth aspect, an upper limit is set during a period in which the capacity of the refrigerant compressor is increased.

  The air conditioner according to a seventh aspect of the invention has a cooling function for cooling the conditioned room by the air cooling action by the evaporator in addition to any of the fourth to sixth aspects, and operates the switch. Sometimes, when the difference between the temperature of the conditioned room and the target temperature is equal to or greater than a predetermined value, the target humidity is changed after a strong cooling operation.

  According to the present invention, the air to be conditioned is dehumidified using an air cooling action by an evaporator and an air heating action by a condenser in a refrigeration cycle having at least a refrigerant compressor, a condenser, a pressure reducing mechanism, and an evaporator. In an air conditioner that has a dehumidifying function and controls the capacity of the refrigerant compressor based on the temperature and target temperature of the conditioned room and / or the humidity and target humidity of the conditioned room, and responds to a predetermined switch operation. The target humidity is lower by a predetermined value or by a predetermined rate than the humidity of the conditioned room when the switch is operated, the humidity of the conditioned room near the operation, or the humidity held in the storage unit when the switch is operated. The target temperature is set to the temperature of the conditioned room when the switch is operated or the temperature of the conditioned room near the time of operation, the temperature held in the storage unit when the switch is operated, or these temperatures. Since change correction to the temperature were, for example, when the conditioning chamber is felt a little hot and sticky, short time as the temperature of the conditioning chamber, and it becomes possible to perform rapid dehumidifying operation. As a result, it is possible to remove the unpleasant feeling steamed after the rain while preventing over-cooling and to achieve comfortable air conditioning in the intermediate period such as during the rainy season.

  According to the invention of claim 2, in the above, the target humidity, the target temperature, the changed target humidity, and the changed target temperature are any one of a plurality of predetermined values. When the room to be conditioned is felt a little hot and humid, it is possible to prevent the air from becoming too cold, and to eliminate the unpleasant feeling of steaming and steaming after the rain, etc., and comfortable air conditioning can be achieved.

  According to the invention of claim 3, in the above claims, when the switch or a different switch is operated again after the switch is operated, the target humidity and the target temperature are changed to the target humidity before the change by the switch operation. In addition, since the target temperature or the humidity or temperature close to the target temperature is set, it is possible to prevent the temperature and humidity from being excessively lowered. Thereby, suitable air conditioning can be achieved.

  According to the invention of claim 4, the air is cooled by the evaporator and the air is heated by the condenser in the refrigeration cycle having at least the refrigerant compressor, the condenser, the decompression mechanism, and the evaporator. In an air conditioner having a dehumidifying function for dehumidifying a conditioned room and controlling the capacity of the refrigerant compressor based on the temperature and target temperature of the conditioned room and / or the humidity and target humidity of the conditioned room, In response to the switch operation, the target humidity is determined from the humidity of the conditioned room when the switch is operated, the humidity of the conditioned room near the switch operation, or the humidity held in the storage unit when the switch is operated. When the humidity of the conditioned room becomes the target humidity before the change after the predetermined switch operation, and the target humidity is changed to the target humidity before the change based on the switch operation or Concerned Since a value close to target humidity, it is possible to perform a wet rapid removal of the harmonic chamber. In particular, if the humidity in the conditioned room is a value that is a predetermined value lower or a value that is lower by a predetermined percentage, the humidity is excessively lowered by automatically returning it to the target humidity before the change or a value close to the target humidity. Can be prevented. Thereby, suitable air conditioning can be achieved.

  According to the invention of claim 5, when the target humidity is changed in claims 1 to 3, the capacity of the refrigerant compressor is increased, so that quicker dehumidification can be performed in a short time. It becomes possible. Thereby, for example, when it is felt that the conditioned room is slightly humid, comfortable air conditioning can be achieved in a short time.

  According to the invention of claim 6, in claim 5, since the upper limit is set during the period in which the operation capacity of the refrigerant compressor is increased, the stress on the compressor due to continuous operation is suppressed. It is something that can be done.

  According to the invention of claim 7, in addition to any of claims 4 to 6, it has a cooling function of cooling the conditioned room by the air cooling action by the evaporator, and when the switch is operated, If the difference between the temperature in the conditioned room and the target temperature is greater than or equal to the specified value, the target humidity is changed after a strong cooling operation, so the conditioned room can be quickly set to the target humidity and temperature. It becomes possible. In particular, since a strong cooling operation is performed first, comfortable air conditioning can be realized in a short time when the user feels uncomfortable after steaming.

  The main feature of the present invention is to perform dehumidification in a short time and quickly with the temperature kept unchanged when it is felt that the conditioned room is slightly humid. For the purpose of dehumidifying in a short time and quickly, the target humidity is a value lower than the humidity of the conditioned room at or near the operation of the switch or the humidity held in the memory when the switch is operated Or, it was realized by changing to a value lower by a predetermined percentage.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a refrigerant circuit diagram of an air conditioner 1 showing an embodiment of the present invention. The air conditioner 1 includes an indoor unit 20 (in a dotted frame) provided in a conditioned room and an outdoor unit 21 (in a dotted frame) provided outside the room. The indoor unit 20 and the outdoor unit 21 include general-purpose microcomputers 53 and 75 (shown in FIGS. 2 and 3) each having a storage unit (memory) (not shown) capable of storing various data. The microcomputer 53 and the microcomputer 75 transmit and receive data to each other, and operate the air conditioner 1.

  In the figure, reference numeral 2 is a variable operating capacity (variable rotation speed) refrigerant compressor, 3 is a four-way valve that switches the direction of refrigerant flow, and 4 is an outdoor heat exchanger provided outside the room, for heating operation. In the figure, it acts as an evaporator, and acts as a condenser during cooling and heating operations. 6, 8 is an electric expansion valve (of the present invention) in which the throttle amount (flow rate) of the refrigerant can be arbitrarily adjusted according to the control signal Equivalent to decompression mechanism). 10 is a strainer, and 5 is a blower fan (propeller fan) for blowing air to the outdoor heat exchanger 4.

  Reference numerals 12 and 14 denote indoor heat exchangers divided into two, which act as a condenser during heating operation, act as an evaporator during cooling operation, and condense at the electric expansion valve 8 during dehumidification operation. Acts on the evaporator and the evaporator. Reference numeral 16 denotes an accumulator, which is annularly connected by a refrigerant pipe as shown in the figure, and constitutes a part of the refrigerant circuit. The indoor heat exchanger 12 is provided in the indoor unit 20 (inside the dotted line frame in FIG. 1) constituting the air conditioner 1 and is formed in a side face shape that is bent along the suction panel 26 of the indoor unit 20. (Shown in FIG. 4). The structure of the indoor unit 20 will be described in detail later.

  Both the indoor side heat exchangers 12 and 14 are connected in series via the electric expansion valve 8, and when the opening degree of the electric expansion valve 8 is in a fully open state, the indoor side heat exchangers 12 and 14 are substantially Unite and act as an evaporator or condenser. Further, when the opening degree of the electric expansion valve 8 is adjusted to a predetermined throttle amount (decompression amount), the refrigerant is circulated by switching the indoor heat exchangers 12 and 14 to the condenser and the evaporator (or the four-way valve 3). Is reversed, the indoor heat exchangers 12 and 14 can act as evaporators and condensers, and the dehumidifying operation can be performed.

  The electric expansion valve 8 is provided with an electromagnetic valve (electromagnetic on-off valve) whose opening degree can be adjusted to either full open or full close, and this electromagnetic valve and a capillary tube in parallel, although not shown. There is no problem. In this case, when the electromagnetic valve is in the fully opened state, the indoor heat exchangers 12 and 14 function substantially as a unit, and function as heat exchangers for cooling and heating. Further, when the solenoid valve is closed, the amount of throttling (refrigerant amount) is adjusted by the capillary tube, so that it can act as the indoor heat exchanger 12 condenser and evaporator.

  Further, when the state of the four-way valve 3 is in the state shown by the solid line in FIG. 1, and the opening degree of the electric expansion valve 8 is fully open (at this time, the opening degree of the electric expansion valve 6 is a predetermined throttle amount). The high-temperature and high-pressure refrigerant discharged from the refrigerant compressor 2 dissipates heat in the outdoor heat exchanger 4 through the four-way valve 3 and is condensed. The refrigerant condensed in the outdoor heat exchanger 4 is throttled by the electric expansion valve 6, evaporates in the indoor heat exchangers 12 and 14 through the strainer 10 and exhibits a cooling action, and then the four-way valve 3 and the accumulator 16 are opened. After that, the refrigerant is again sucked into the refrigerant compressor 2 to form a refrigeration cycle. At this time, a cooling operation is performed in which the refrigerant evaporates in the indoor heat exchangers 12 and 14 and the cooled air is supplied to the conditioned room by the blower fan 15 (cross flow fan).

  When the opening degree of the electric expansion valve 6 is fully open and the opening degree of the electric expansion valve 8 is a predetermined throttle amount, the high-temperature and high-pressure refrigerant discharged from the refrigerant compressor 2 passes through the four-way valve 3. It passes through the outdoor heat exchanger 4 as it is. At this time, the microcomputer 53 stops the blower fan 5 of the outdoor heat exchanger 4 or adjusts the air volume according to the room temperature of the conditioned room. Both the blower fans 5 and 15 use DC brushless motors, and are configured so that the amount of blown air can be varied substantially linearly. The outdoor unit 21 includes an outdoor heat exchanger 4, an air blowing fan 5, an electric expansion valve 6, a refrigerant compressor 2, and the like provided outside.

  The refrigerant exiting the outdoor heat exchanger 4 flows into the indoor heat exchanger 12 through the electric expansion valve 6 and the strainer 10, and the air heated by the indoor heat exchanger 12 is covered by the blower fan 15. While being supplied to the conditioned room for heating operation, the refrigerant that has exited the indoor heat exchanger 12 is throttled by the electric expansion valve 8, and the refrigerant evaporates in the indoor heat exchanger 14, thereby achieving a cooling action. Is done.

  In the indoor heat exchanger 14, the cooled air and the air heated by the indoor heat exchanger 12 are mixed by the blower fan 15 in the indoor heat exchanger 12 and then supplied to the conditioned room. At this time, the opening degree (throttle amount) of the electric expansion valve 8 is controlled by the microcomputer 53, and the temperature of the discharge air supplied into the conditioned room is controlled.

  That is, when the air is cooled in the indoor heat exchanger 14, moisture in the air is condensed to form dew and adhere to the surface of the indoor heat exchanger 14 to perform dehumidification. Then, the refrigerant that has exited the indoor heat exchanger 14 forms a refrigeration cycle that is sucked into the refrigerant compressor 2 again via the four-way valve 3 and the accumulator 16. The dehumidifying operation in the air conditioner 1 will be described in detail later.

  On the other hand, during the heating operation, the microcomputer 53 constitutes a refrigerant circuit in which the four-way valve 3 is switched to the state indicated by the dotted line (FIG. 1), and the opening degree of the electric expansion valve 8 is fully opened to open the opening degree of the electric expansion valve 6. Is adjusted to a predetermined aperture amount. As a result, the high-temperature and high-pressure refrigerant discharged from the refrigerant compressor 2 is condensed in the indoor heat exchangers 14 and 12 via the four-way valve 3. This condensed heat is supplied to the conditioned room by the blower fan 15.

  The refrigerant exiting the indoor heat exchangers 14 and 12 is throttled by the electric expansion valve 6 through the strainer 10, evaporated and radiated by the outdoor heat exchanger 4, and again through the four-way valve 3 and the accumulator 16. A refrigeration cycle sucked into the refrigerant compressor 2 is formed. At this time, the heating operation is performed by condensing the high-temperature and high-pressure refrigerant in the indoor heat exchangers 14 and 12, and the air heated by the indoor heat exchanger 12 is supplied to the conditioned room by the blower fan 15. As a result, the room to be conditioned is heated.

  That is, the microcomputer 53 causes the outdoor heat exchanger 4 provided in the outdoor unit 21 to act as a condenser during cooling operation, and causes the indoor heat exchangers 12 and 14 provided in the indoor unit 20 to function as evaporators. At the same time, during the heating operation, the outdoor heat exchanger 4 acts as an evaporator, and the indoor heat exchangers 12 and 14 act as condensers. Further, during the dehumidifying operation, the microcomputer 53 causes the indoor heat exchanger 14 to act as an evaporator, causes the indoor heat exchanger 12 to act as a condenser, and causes the outdoor heat exchanger 4 to act as a radiator.

  On the other hand, in FIG. 2, the schematic block diagram of the control circuit used for control of the indoor unit 20 which comprises the refrigerating cycle of the air conditioner 1 is shown. In this figure, 40 is a plug to which 100V AC power is supplied, and this plug 40 is connected to a 100V commercial AC power supply. This AC power is supplied to the power supply circuit 43 via the switch 42.

  Also, 44 is a current fuse, 45 is a rectifier circuit, 46 is a motor power supply for a motor, 47 is a control power supply for control, 48 is a serial power supply for communication, and these components constitute a power supply circuit 43. ing.

  The current fuse 44 is blown to protect the circuit when the current supplied to the power supply circuit 43 becomes equal to or higher than a predetermined current. The rectifier circuit 45 supplies all AC power obtained through the current fuse 44. Wave rectifies. The motor power supply 46 (switching power supply circuit) generates drive power for the fan motor 49 (DC motor) that constitutes the blower fan 15, and controls the ON duty of the switching waveform based on a signal from the microcomputer 53. The output voltage is varied between DC12V and DC48V.

  The control power supply 47 generates and stabilizes a drive power supply (DC5V) of the control unit 50 described later, and the serial power supply 48 transmits a signal (four-way) to the outdoor unit 21 including the outdoor heat exchanger 4. This is a circuit for sharing a common line with AC power supplied to the outdoor unit 21 such as a switching signal of the valve 3 and a set value of the rotational speed of the refrigerant compressor 2.

  Reference numeral 51 denotes a terminal plate provided with a first terminal, a second terminal, and a third terminal, and the first terminal, the second terminal, and the third terminal are disposed on a resin terminal block (not shown). At the same time, a temperature fuse 52 that opens the circuit by fusing at a predetermined temperature or higher is attached so that the temperature of the terminal block, that is, the temperature of the terminal board 51 can be detected.

  A normally-open contact piece 57 of the power relay 56 is interposed between the first terminal of the terminal board 51 and the plug 40, and the normally-open contact piece 57 is closed by the output of the microcomputer 53 (the driver is not shown). The AC power output from the plate 51 to the outdoor unit 21 is controlled.

  The second terminal of the terminal board 51 is connected to the plug 40 and is a common line with the third terminal (signal output terminal).

  The third terminal is a terminal for outputting a signal output from the microcomputer 53 via the serial circuit 38 and the serial power supply 48.

  Note that the first, second and third terminals of the terminal board 51 are connected so that the same terminal numbers are connected to the terminal board 71 of the electric circuit mounted on the outdoor unit 21 of FIG.

  The temperature fuse 52 is inserted into the drive line of the power relay 56, and when the temperature of the terminal board 51 rises, the energization to the power relay 56 is cut off, the normally open contact piece 57 is opened, and the AC power to the outdoor unit 21 is opened. Is to cut off the supply.

  59 is a wireless remote controller, and this remote controller 59 includes a plurality of switches 58 for operating the air conditioner 1 (one switch 58 is shown in FIG. 2), an operation mode, humidity and temperature, Alternatively, a display unit (not shown) or the like that displays setting contents and the like is provided. The remote controller 59 performs various settings and function selections such as operation control of the air conditioner 1 and setting of setting values based on the operation of the switch 58, and an operation signal thereof is provided on the display substrate 60. Sent to the receiving circuit.

  That is, the remote controller 59 is provided with the operation / stop of the air conditioner 1, heating, cooling, dehumidification, wind direction up / down / left / right, timer, and many other switches 58 and a display unit. The heating operation, the cooling operation, and the dehumidifying operation have a function called “slight” or “fast”, and the remote controller 59 is also provided with a switch 58 corresponding to the “slight” and “fast” functions. .

  In the present invention, “slight” and “fast” will be particularly described. “Slightly” is a switch 58 suitable for use when it is slightly hot during cooling operation, when it is slightly steamed during dehumidification operation, or when it is slightly cold during heating operation. “Hayaku” is a switch 58 suitable for use when performing powerful cooling (high power rapid cooling) when returning from outside when the summer is hot or when the bath is hot. Description of other switches is omitted.

  The microcomputer 53 receives an operation signal from the remote controller 59 and controls the operation of the air conditioner 1. The display substrate 60 displays the operating state of the air conditioner 1 (such as cooling / heating / dry operation modes, set values, room temperature, etc.).

  Reference numeral 61 denotes a switch board, which is provided with service-related switches such as the switch 42 and a test operation switch. The switches provided on the switch board 61 and the switches 58 provided on the remote controller 59 are configured to perform the same operation. Further, the indoor unit 20 may be provided with an operation unit (not shown) connected by wire, and at this time, the operation unit is also configured to perform the same operation as the remote controller 59.

  Reference numeral 62 denotes an external ROM that stores an initial setting value of the microcomputer 53 and the like.

  Reference numerals 63 and 64 denote a temperature sensor for detecting the temperature of the conditioned room and a temperature sensor for detecting the temperature of the indoor heat exchangers 12 and 14, which are connected to the A / D input terminal of the microcomputer 53.

  Reference numeral 65 denotes a humidity sensor that detects the humidity in the conditioned room, and is connected to the A / D input terminal of the microcomputer 53. The microcomputer 53 operates the air conditioner 1 based on the temperature and humidity detected from these sensors. It is something to control. The microcomputer 53 monitors the temperature of the conditioned room with the temperature sensors 63 and 64, captures it and holds it in the memory (storage unit), and updates it every predetermined time (for example, 1 second, 30 seconds, 1 minute interval, etc.) Update at any interval). Similarly, in the case of humidity, the microcomputer 53 monitors the humidity of the conditioned room with the humidity sensor 65, captures it and holds it in the memory (storage unit), and updates it every predetermined time (for example, at intervals of 1 minute). Etc.).

  Reference numeral 66 denotes a step motor that changes the opening degree of the electric expansion valve 8. The electric expansion valve 8 changes the opening degree in response to a signal from the microcomputer 53. 67 is a motor drive circuit. The control unit 50 includes the motor drive circuit 67, the microcomputer 53, the serial circuit 38, and the like.

  The motor drive circuit 67 is composed of an inverter circuit in which switching elements are connected in a three-phase bridge shape and a control unit, and energizes each stator winding of the DC motor to rotationally drive the fan motor 49 (the blower fan 15). The fan motor 49) is switched according to the rotational position of the rotor. The rotational speed of the fan motor 49 is controlled by changing the voltage applied to the stator winding.

  The electric expansion valves 6 and 8 are configured such that the throttle amount (flow rate) of the refrigerant is controlled by a built-in drive unit (step motor or the like), and the throttle amount is arbitrarily controlled according to a signal output from the microcomputer 53. The In addition, when one of the electric expansion valves 6 and 8 is a control target, the rest is in a fully open state (or a state close to full open). The electric expansion valves 6 and 8 are controlled so that the temperature of the heat exchanger acting as an evaporator becomes constant.

  Reference numeral 18 denotes an electric dust collector, and 19 denotes a power supply device. The power supply device 19 applies a DC high voltage of about 5 KV to the electric dust collector 18. Although not shown, the electrostatic precipitator 18 has a dust collector contact that contacts the non-dust collector electrode, and a charged contact that contacts the charged discharge electrode. Fine particles in the air (dust, dust, pollen, mite carcass powder, etc.) are positively charged by corona discharge by the charged portion discharge electrode applied from the power supply device 19 through the charged portion contact.

  The positively charged fine particles are introduced into the electric field generated between the dust collecting electrode and the non-dust collecting electrode, and collected by the dust collecting electrode having a lower potential than the non-dust collecting electrode. Is. The electric dust collector 18 can repair odor as well as dust collection. The electrostatic precipitator 18 is not limited to this, and may be an electrostatic electrostatic precipitator according to another method.

  FIG. 3 is a schematic block diagram of a control circuit used for controlling the outdoor unit 21 constituting the refrigeration cycle of the air conditioner 1. The terminal numbers of the terminal boards 71 are the same and are connected to the terminal board 51 shown in FIG.

  In this figure, 72 is a power circuit, which doubles voltage rectifies and smoothes AC power (in this case, AC 100V from the indoor unit 20) obtained through the first and second terminals of the terminal board 71. Yes, a varistor, noise filter, reactor, current fuse, etc. are added.

  The DC power (about DC 280V) output from the power supply circuit 72 is output to an inverter circuit 73 in which a plurality of switching elements are connected in a three-phase bridge shape, and a pseudo-sine wave three-phase AC (refrigerant compression) based on PWM theory. When the machine 2 uses an induction motor) or a method of judging the rotational position of the rotor and energizing the stator windings with an energization pattern corresponding to this rotational position (the refrigerant compressor 2 uses a DC motor) In this case, the refrigerant is supplied to the refrigerant compressor 2.

  Therefore, in any case, the operating capacity of the refrigerant compressor 2 can be controlled by changing the rotation speed (rotation speed) of the refrigerant compressor 2.

  A microcomputer 75 is mounted on the control board 74. Based on the control signal received from the microcomputer 53 of the indoor unit 20 via the third terminal of the terminal board 71 and the serial circuit 76, the microcomputer 75 controls the operation capacity (operation speed) of the refrigerant compressor 2 by the above operation. Furthermore, the current value detected by a CT (current detector) 78 connected to the current detection circuit 77 does not exceed a predetermined value by controlling the switching of the four-way valve 3 and the blower fan 5 (fan motor for driving the propeller fan). Thus, the operation capability of the refrigerant compressor 2 is corrected, and the operation capability of the refrigerant compressor 2 is corrected so that the temperature of the temperature sensor 79 that detects the temperature of the refrigerant compressor 2 does not exceed a predetermined value.

  Reference numeral 80 denotes an outside air temperature sensor that detects the temperature of outside air. The outside air temperature detected by this sensor is transmitted to the microcomputer 53 of the indoor unit 20 via the serial circuit 76.

  In addition, 81 is a temperature sensor which detects the temperature of an outdoor heat exchanger, 82 is a switching power supply which produces | generates the direct-current power for control.

  Next, the structure of the indoor unit 20 will be described in detail. As shown in FIG. 4, the indoor unit 20 includes a front case 22 provided on the front side, a suction panel 26 provided on the front part of the front case 22 and provided with an air inlet for the conditioned room, and a rear surface. And a rear case 24 on the side. Inside the front and rear cases 22, 24 and the suction panel 26, the blower fan 15 as described above is disposed substantially at the center of the indoor heat exchanger, and the front side is the indoor side bent along the suction panel 26. Heat exchangers 12 and 14 are provided.

  The blower fan 15 sucks the air in the conditioned room from the intake port of the suction panel 26, heats / cools / dehumidifies the air in the indoor heat exchangers 12 and 14, and circulates it again in the conditioned room. Further, between the front and rear cases 22, 24 and the suction panel 26 and the indoor heat exchangers 12, 14, a relatively large dust sucked by the blower fan 15 is captured and a detachable filter 28 is mounted. Has been. Furthermore, between the filter 28 and the indoor heat exchangers 12, 14, the electricity that collects relatively fine dust in the conditioned room that passes through the filter 28 and is sucked by the blower fan 15 by electrostatic force. A dust collector 18 is attached.

  A drain pan 30 is disposed below the indoor heat exchangers 12 and 14 to receive water droplets that have been cooled or condensed and dropped by the indoor heat exchangers 12 and 14 during dehumidification. A cold air / warm air outlet 32 is formed. The air outlet 32 is provided with an up / down air direction changing blade 34 and a left / right air direction changing blade 36.

  The air conditioner 1 configured as described above controls the operation of each device based on a program stored in the microcomputer 53 of the indoor unit 20. For example, the microcomputer 53 of the air conditioner 1 is configured so that the air conditioner 1 can be controlled from the temperature deviation between the indoor temperature and the set temperature and the change in the temperature deviation as follows. . That is, the microcomputer 53 automatically controls the operating capacity of the refrigerant compressor 2 based on the temperature and target temperature of the conditioned room and / or the humidity and target humidity of the conditioned room when dehumidifying the conditioned room. To do. Specifically, the microcomputer 53 determines and controls the rotation speed of the refrigerant compressor 2 based on the difference between the temperature of the chamber to be conditioned and the target temperature, and determines the rotation speed when determining the rotation speed. The rotational speed is corrected in consideration of the difference between the humidity and the target humidity.

  Further, the microcomputer 53 holds the target humidity in response to the operation of the predetermined switch 58 in the memory when the switch 58 is operated or near the operation, or when the switch 58 is operated. The value is changed to a value lower than the humidity by a predetermined value or a value lower by a predetermined ratio. The value (humidity value) that can be set for the target humidity is a plurality of integer values in increments of 5% within a predetermined range. It is the value which performed. Also, this value is not limited to 5% increments, but can be selected appropriately according to the control accuracy and the ability of the microcomputer. The same applies to the setting of the target temperature, and in the embodiment of the present application, description will be made in increments of 1 ° C.

  Specifically, the microcomputer 53 holds the humidity of the conditioned room detected by the humidity sensor 65 when the switch 58 (“slight” or “fast”) provided on the remote controller 59 is operated (or stored in the memory of the microcomputer 53). A value lower than a predetermined value (referred to as a value about 5% lower in the embodiment, hereinafter referred to as a value lower than the predetermined value), or a value lower by a predetermined percentage (for example, currently 50% humidity) 90% of the humidity 50% is 45%, which is hereinafter referred to as a predetermined value lower), and the operation of the refrigerant compressor 2 (including the blower fan 5) is controlled. The humidity of the conditioned room detected by the humidity sensor 65 is not limited to the humidity at the time when the switch 58 is operated, but is the average value from the time when the switch 58 is operated to a predetermined time (held in the memory of the microcomputer 53). However, in the embodiment, the humidity when the switch 58 is operated is used.

  Further, the microcomputer 53 holds the target temperature in the memory in response to the operation of the predetermined switch 58 or the temperature of the conditioned room when the switch 58 is operated or from the operation to the vicinity of the operation, or when the switch 58 is operated. Or a value obtained by performing a predetermined correction on these temperatures.

  Specifically, the microcomputer 53 is stored in the memory of the conditioned room detected by the temperature sensor 63 when the switch 58 (“slightly” or “fast”) provided on the remote controller 59 is operated. The temperature is changed to a value obtained by performing a predetermined correction (changed to a value lower by about 5 ° C. in the embodiment), and the operation of the refrigerant compressor 2 (including the blower fan 5) is controlled. Note that the temperature of the conditioned room detected by the temperature sensor 63 is not limited to the temperature when the switch 58 is operated, but is an average value from the time when the switch 58 is operated to a predetermined time (held in the memory of the microcomputer 53). The average temperature of about 5 minutes) may be used, but the embodiment is the temperature when the switch 58 is operated.

  This makes it possible to perform dehumidification in a short time and quickly with the temperature kept unchanged if the conditioned room feels a little muddy and hot. This eliminates the unpleasant feeling of steaming and makes it possible to achieve comfortable air conditioning in the middle period such as during the rainy season.

  Further, when the switch 58 is operated again after the switch 58 is operated, the microcomputer 53 sets the target humidity and the target temperature to the target humidity and the target temperature before the change by the operation of the switch 58 or close to them. Automatically return to value. As a result, when the room to be conditioned is felt a little hot and humid, it is possible to prevent it from getting too cold, and to remove the unpleasant feeling of steaming after the rain, etc., and to realize comfortable air conditioning. .

  In response to the operation of the predetermined switch 58, the microcomputer 53 determines the target humidity from the humidity of the conditioned room when the switch 58 is operated or near the operation time, or the humidity held in the memory when the switch 58 is operated. Change the value to a lower value or a value lower by a predetermined percentage.

  Specifically, the microcomputer 53 determines the humidity of the conditioned room in which the humidity sensor 65 detects the target humidity when the switch 58 (“slight” or “fast”) provided in the remote controller 59 is operated. It is changed to a value lower by a predetermined value or a value lower by a predetermined percentage than the humidity held in the memory.

  Further, when the humidity of the conditioned room becomes a value lower by a predetermined value or a value lower by a predetermined ratio, the microcomputer 53 sets the target humidity to a target humidity before the change by the operation of the switch 58 or a value close to the target humidity. Automatically return to

  Specifically, after operating the switch 58 (“slightly” or “fast”) provided on the remote controller 59, the microcomputer 53 has a low humidity value in the conditioned room by a predetermined value (a value about 5% lower in the embodiment). ), Or when the value is lower by a predetermined ratio (for example, when 50% of the current humidity is 90% or 45%), the target humidity is changed to the target humidity by the operation of the switch 58 or the target humidity. Return to a value close to humidity. The microcomputer 53 similarly controls the temperature of the conditioned room.

  That is, when the humidity of the conditioned room becomes a value lower by a predetermined value or a value lower by a predetermined ratio, the microcomputer 53 sets the target humidity to a target humidity before changing by operating the switch 58 or a value close to the target humidity. By automatically returning to the state, it is possible to prevent excessive humidity in the conditioned room, and it is possible to realize suitable air conditioning. Moreover, since the trouble of returning the switch can be saved, the operability of the air conditioner 1 can be greatly improved, and the power consumption can be reduced by automatically returning the air conditioner 1, thereby contributing to energy saving. .

  In addition, when the target humidity is changed by operating the switch 58 provided in the remote controller 59, the microcomputer 53 increases the capacity of the refrigerant compressor 2 (high power operation or the blower fan 5). Increase the number of revolutions). Further, the microcomputer 53 ends the increase in the capacity of the refrigerant compressor 2 with an elapse of a predetermined time (for example, 15 minutes) as an upper limit.

  Thereby, it becomes possible to perform a quick dehumidifying operation in a short time, and when it is felt that the conditioned room is a little muddy and hot, comfortable air conditioning can be realized in a short time.

  Next, the dehumidifying operation “a little” of the air conditioner 1 will be described as an example with reference to the flowchart of FIG. 5. The flowchart is the operation of the main part of the program stored in the microcomputer 53. The air conditioner 1 is operated by the remote controller 59, but the same operation may be performed by the operation unit of the indoor unit 20 as described above.

  In this flowchart, the dehumidifying operation “a little” when the switch 58 of the remote controller 59 is operated will be described. First, in step S1, the microcomputer 53 determines in step S1 whether or not the “slight” switch of the switch 58 of the remote controller 59 has been operated. If there is a “slight” command (when the “slight” switch is operated), the process proceeds to step S2 to determine whether or not the “slight” operation is set (whether or not the flag is ON). . If the “slight” switch is not operated in step S1, the system waits for the “slight” switch to be operated.

  If the “Slight” operation has been set in step S2 (if the flag is ON and the “slight” operation is performed), the process proceeds to step S3, where the microcomputer 53 cancels the “slight” setting. In other words, the target humidity and the target temperature are returned to values before or after the operation of the switch 58 (or before the change), or in step S4, the setting flag is turned off, and the process returns to step S1.

  In step S2, if the microcomputer 53 does not set a “slight” operation (if the flag is OFF and the “slight” operation is not performed), the microcomputer 53 proceeds to step S5 and sets the “slight” operation. Do. That is, the microcomputer 53 holds the target humidity in the memory in response to the operation of the switch 58 of the remote controller 59 when the switch 58 is operated or the humidity of the conditioned room near the operation time or when the switch 58 is operated. The humidity is changed to 5% (current humidity−n%) lower than the existing humidity, and the process proceeds to step S6. The target humidity after this change is, for example, in increments of 5% (not limited to this, but can be appropriately selected, for example, in increments of 1%, increments of 2%, increments of 10%, etc. from the accuracy of the humidity sensor, the processing capacity of the microcomputer, etc. .)) Is selected from the close values. If the current humidity is 60%, the target humidity is changed to 55%, and if the current humidity is 52%, the target humidity is 45% (the lower value if the step size does not match the changed target room value). ) Or a low value by a predetermined ratio (such as 10% / 20%) may be similarly changed as the target humidity. When the target humidity can be set in increments of 1% and the output of the humidity sensor can be performed in increments of 1%, a value obtained by subtracting 5% may be used as the target humidity value.

  In step S6, the set temperature is changed in the same manner as the change of the set humidity in step S5. However, the unit for changing the set temperature is in increments of 1 ° C. Then, based on the changed set humidity, the set temperature and the current humidity, temperature, etc., the air volume, the wind direction, the number of rotations of the compression device, etc. are calculated and set again. Thereafter, the process proceeds to step S7, a flag indicating that the “slight” operation is set is turned ON, and the process returns to step S1.

  As described above, when it is felt that the conditioned room is a little sultry, it is possible to perform dehumidification quickly and quickly with the temperature kept unchanged. As a result, it is possible to remove the unpleasant feeling steamed after the rain while preventing the room from being chilled too much, and to realize comfortable air conditioning in the middle period such as the rainy season.

  Further, when the switch 58 is operated again after the switch 58 is operated, the target humidity and the target temperature are returned to the target humidity and the target temperature before the change by the operation of the switch 58 or values close thereto. . Thereby, for example, in the case of the dehumidifying operation state, it is possible to prevent the air from being overcooled, and to remove the unpleasant feeling steamed after the rain or the like, thereby realizing comfortable air conditioning.

  Next, FIG. 6 shows a comparative view of the dehumidifying time during high power operation and normal operation of the air conditioner 1 of the present invention. The air conditioner 1 has substantially the same configuration as the above-described embodiment. Hereinafter, different parts will be described. In the figure, the vertical axis indicates humidity / temperature, and the horizontal axis indicates time. Moreover, the normal operation of the air conditioner 1 sets the rotation speed of the refrigerant compressor 2 and the rotation speed of the blower fan 5 to 10% to 70%, and the high power operation sets the rotation speed and rotation speed to 100%. . The high power operation and the normal operation of the refrigerant compressor 2 refer to a state including the blower fan 5. Further, when “Hayaku” is operated with the switch 58 provided in the remote controller 59, the high-power operation of the refrigerant compressor 2 is performed, and when “Hayaku” is released, the normal operation of the refrigerant compressor 2 is performed. Done.

  During the cooling operation of the air conditioner 1, when the switch 58 is operated, if the difference between the temperature of the conditioned room and the target temperature is a predetermined value or more (for example, 5% or more), the microcomputer 53 is more than normal by the cooling function. The target humidity is changed after a strong cooling operation (high power operation).

  In this case, the microcomputer 53 needs to lower the temperature in the conditioned room in a short time by reducing the target temperature during the high power operation of the refrigerant compressor 2, that is, the “fast” operation. For this reason, during the “fast” operation, the temperature is set lower than the target temperature until the temperature in the conditioned room reaches the target value, and when the target value is reached, the set temperature is changed back to the original target humidity. Then, when the temperature in the conditioned room reaches the target value, the microcomputer 53 performs the normal operation of the refrigerant compressor 2 and changes the target humidity.

  In other words, when dehumidifying the conditioned room, the target temperature / humidity is achieved in a shorter time than the temperature / humidity during normal operation (dotted line in the figure) by first performing a stronger “fast” operation (solid line in the figure). Can be achieved. In particular, “fast” operation is performed first, and normal operation is performed when the temperature and dehumidification reach the target values, so that comfortable air conditioning can be achieved in a short time in the event of discomfort caused by steaming after rain. Will be able to.

  Next, the dehumidifying operation “Hayaku” of the air conditioner 1 will be described as an example with reference to the flowchart of FIG. 7. This flowchart is also the operation of the main part of the program stored and executed in the microcomputer 53. The air conditioner 1 is operated by the remote controller 59, but the same operation may be performed by the operation unit of the indoor unit 20 as described above.

  In this flowchart, the dehumidifying operation “Hayaku” when the switch 58 of the remote controller 59 is operated will be described. First, in step S11, the microcomputer 53 operates the switch 58 of the remote controller 59, and when there is a “fast” command (when the flag is turned on), stores the command in the memory as a new setting, Proceeding to step S12, if there is no “fast” command, the system waits for a “fast” command. Since the switch 58 of the remote controller 59 is operated by someone and “Hayaku” is executed, and the setting end flag may be turned ON in step S7 described later, the microcomputer 53 first executes step S1. .

  In step S12, when the difference between the temperature in the conditioned room and the target temperature is small (in this case, for example, 2 ° C.), the microcomputer 53 proceeds to step S13 and switches the circuit of the refrigeration cycle to the dehumidifying operation, and Is turned on and held in the memory. In step S14, when the dehumidification setting has already been performed, the high power setting by “Hayaku” is set, and the high power operation of the refrigerant compressor 2 is being executed, the process proceeds to step S15. That is, when the rotational speed of the refrigerant compressor 2 is operating at 100% and the rotational speed of the blower fan 5 is operating at 100%, the process proceeds to step S15.

  Therefore, when the microcomputer 53 has executed the high power operation of the refrigerant compressor 15 and 15 minutes have passed, the microcomputer 53 proceeds to step S16, turns on the high power end flag, and holds it in the memory. Further, the microcomputer 53 cancels the high-power operation of the refrigerant compressor 2, and normally operates the refrigerant compressor 2 that operates at 100% rotation speed and the blower fan 5 that operates at 100% rotation speed. Return to.

  Next, it progresses to step S17, and the microcomputer 53 returns to the normal driving | operation of the refrigerant compressor 2, and when the difference of the humidity in a to-be-conditioned room and the target humidity before a change becomes small (in this case, for example within 5%) In step S18, the set humidity is canceled, and the process returns to step S11.

  If the difference between the temperature in the conditioned room and the target temperature is not small (in this case, for example, 2 ° C. or more) in step S12, the microcomputer 53 proceeds to step S19. Therefore, the microcomputer 53 switches from the dehumidifying operation to the cooling operation, and sets the rotational speed of the blower fan 5 which is a cooling setting stronger than the normal cooling function to 100% (at this time, the refrigerant compressor 2 is in the normal operation). After setting and performing a strong cooling operation, the process returns to step S11.

  On the other hand, if the dehumidification setting has already been made in step S14 and the high power setting by "Hayaku" has been set and the high power operation of the refrigerant compressor 2 has not been executed, the microcomputer 53 proceeds to step S20. Therefore, the microcomputer 53 sets the refrigerant compressor 2 to high power and performs high power operation, and then returns to step S11.

  In step S15, if the microcomputer 53 executes the high power operation of the refrigerant compressor 2 and 15 minutes have not yet elapsed, the microcomputer 53 proceeds to step S21 and continues dehumidifying the refrigerant compressor 2 with the high power operation. Then, the process returns to step S11.

  Further, in step S17, the microcomputer 53 returns to the normal operation of the refrigerant compressor 2, and the difference between the humidity in the conditioned room and the target humidity is not yet small (in this case, for example, not within 2%). Return to S11.

  In this way, by performing high power operation for dehumidification, it becomes possible to quickly reach the target humidity and temperature in the conditioned room, and when the conditioned room is reduced to the target humidity and temperature, the changed humidity and temperature are changed. Since the normal operation is performed by automatically returning the value before the change, it is possible to reduce the power consumption and to save energy. In particular, after the strong cooling operation is performed first, dehumidification is performed, so it is possible to realize comfortable air conditioning in a very short time when it feels uncomfortable after steaming. is there.

  In the embodiment, the operation of the refrigerant compressor 2 is performed by “slow” and “fast” for dehumidification of the room to be conditioned, but the operation of the refrigerant compressor 2 of “slow” and “fast” is conditioned. The present invention is effective not only for indoor dehumidification but also for heating and cooling in a conditioned room.

  Further, the present invention is not limited to the above-described embodiments, and the present invention is effective even when the set temperature and other various changes are made without departing from the scope of the present invention.

1 is a refrigerant circuit diagram of an air conditioner showing an embodiment of the present invention (Embodiment 1). It is a schematic block diagram of the control circuit used for control of the indoor unit which comprises the refrigerating cycle of the air conditioner of FIG. It is a schematic block diagram of the control circuit used for control of the outdoor unit which comprises the refrigerating cycle of the air conditioner of the same FIG. It is a systematic diagram shown with sectional drawing of the indoor unit which comprises the refrigerating cycle of the air conditioner of this invention. It is a flowchart which shows operation | movement of an example of the air conditioner of this invention. It is a comparison figure of the dehumidification time at the time of the high power driving | operation of the air conditioner of this invention, and a normal driving | operation (Example 2). It is a flowchart which shows operation | movement of the other example of the air conditioner of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Refrigerant compressor 4 Outdoor heat exchanger 5 Blower fan 6 Electric expansion valve (pressure reduction mechanism)
8 Electric expansion valve (pressure reduction mechanism)
DESCRIPTION OF SYMBOLS 12 Indoor side heat exchanger 14 Indoor side heat exchanger 15 Blower fan 18 Electric dust collector 20 Indoor unit 21 Outdoor unit 26 Suction panel 28 Filter 32 Outlet 43 Power supply circuit 58 Switch 59 Remote controller 75 Microcomputer

Claims (7)

A dehumidifying function for dehumidifying the conditioned room using an air cooling action by the evaporator and an air heating action by the condenser in a refrigeration cycle having at least a refrigerant compressor, a condenser, a decompression mechanism, and an evaporator An air conditioner that controls the capacity of the refrigerant compressor based on the temperature and target temperature of the conditioned room and / or the humidity and target humidity of the conditioned room,
In response to a predetermined switch operation, the target humidity is held in the storage unit when the switch is operated, the humidity of the conditioned room when the switch is operated, or the humidity of the conditioned room near the operation, or when the switch is operated. Change to a value lower by a predetermined value or a predetermined percentage lower than humidity, etc.,
The target temperature is set to the temperature of the conditioned room when the switch is operated, the temperature of the conditioned room near the time of operation, the temperature held in the storage unit when the switch is operated, or these temperatures. The air conditioner is characterized in that the temperature is changed to the corrected temperature.   The air conditioner according to claim 1, wherein the target humidity, the target temperature, the changed target humidity, and the changed target temperature are any one of a plurality of predetermined values.   After the switch is operated, when the switch or a different predetermined switch is operated again, the target humidity and the target temperature are changed to the target humidity and the target temperature before the change by the switch operation or close to them. The air conditioner according to claim 1 or 2, wherein the air conditioner is humidity or temperature. A dehumidifying function for dehumidifying the conditioned room using an air cooling action by the evaporator and an air heating action by the condenser in a refrigeration cycle having at least a refrigerant compressor, a condenser, a decompression mechanism, and an evaporator An air conditioner that controls the capacity of the refrigerant compressor based on the temperature of the conditioned room and the target temperature and / or the humidity and the target humidity of the conditioned room,
The target humidity in response to a predetermined switch operation, the humidity of the conditioned room when the switch is operated, the humidity of the conditioned room near the operation of the switch, or the storage unit when the switch is operated Change to a value lower by a predetermined value or a predetermined percentage lower than the humidity held in the
After the predetermined switch operation, when the humidity of the conditioned room becomes the target humidity before the change, the target humidity is set to the target humidity before the change based on the switch operation or a value close to the target humidity. A featured air conditioner.   The air conditioner according to any one of claims 1 to 3, wherein when the target humidity is changed, the capacity of the refrigerant compressor is increased.   The air conditioner according to claim 5, wherein an upper limit is set during a period in which the capacity of the refrigerant compressor is increased. A cooling function for cooling the conditioned room by the cooling action of air by the evaporator;
5. When the switch is operated, if the difference between the temperature of the conditioned room and the target temperature is a predetermined value or more, the target humidity is changed after a strong cooling operation is performed. The air conditioner according to any one of claims 6 to 6.

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