JPH11151454A - Electric equipment with air purifying function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To timely execute dust removing mode by accurately judging the quantity of dust stuck to a dust collecting electrode. SOLUTION: In an electric equipment having an air purifying function for discharging a purified air to the outside by incorporating a dust collecting device, which is provided with a high voltage units 77 connected to a power source and a discharge electrode 42 and the dust collecting electrode 41 connected to the power unit 77, and dust-collecting the dust contained in the outside air sucked by the rotation of a fan on the dust collecting electrode 41, a current measuring part 79 for massing on demand the current of the primary or secondary sidle of the high voltage unit 77 and a dust collecting quantity decision part 80 for deciding the dust collecting quantity of the dust collecting electrode 41 based on the change of current measured by the current measuring part 79 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which external air is sucked by the rotation of a fan having a plurality of rotation modes, and dust and dirt contained in the sucked air are collected by a dust collecting device provided inside. The present invention relates to an electric device having an air purifying function for discharging purified air to the outside, and is used, for example, as an air purifier alone or as an air conditioner having an air purifying function.

[0002]

2. Description of the Related Art In recent years, there has been an increasing need to maintain a comfortable living space by keeping indoor air clean, and in order to respond to the need, an air purifier or an air conditioner having an air purifying function (a so-called air conditioner). , Air conditioners) are provided. As a device for realizing such an air purifying function, an electronic dust collecting device including a discharge electrode and a dust collecting electrode has been conventionally provided. This dust collector applies a high voltage between the discharge electrode and the dust collection electrode, ionizes dust existing in the surrounding air by the discharge electrode, and adsorbs (adheres) the dust to the dust collection electrode.

[0003] In an electric device having such a dust collecting device, when dust adhering to the dust collecting electrode exceeds a certain amount, the dust collecting effect is rapidly reduced. In some cases, corona discharge is generated from the tip of the dust collection electrode, which may cause smoke and odor. Therefore, it is necessary to periodically remove dust adhering to the dust collecting electrode. However, an air conditioner having an air purifying function has a structure in which a user cannot clean the dust collecting device because the dust collecting device is mounted behind the heat exchanger. Therefore, such an air conditioner requires a system (maintenance-free) for automatically cleaning the built-in dust collector.

Conventionally, as a system for automatically cleaning such a dust collecting apparatus, a heating section (such as a sheathed heater) is provided on a dust collecting electrode. That is, by heating the heating unit, dust attached to the dust collecting electrode is removed (decomposed into carbon dioxide and water by a reaction with a ceramic catalyst deposited on the surface of the dust collecting electrode). In such a dust collector, it is important to determine at what timing the process of removing dust attached to the dust collecting electrode (dust removal mode) is performed. When a predetermined time (for example, 8 hours) is reached, it is determined that a certain amount of dust has adhered to the dust collection electrode, and the dust removal mode is executed.

[0005]

That is, in the prior art, the execution timing of the dust removal mode is determined only by the operation time. However, the operation time does not always coincide with the amount of dust adhering to the dust collection electrode. For example, when the air conditioner fan (cross-flow type fan) has a plurality of rotation modes (for example, three types of strong, medium, and weak), a case where the operation is continued for 8 hours in a weak state and a case where a strong The amount of dust adhering to the dust collecting electrode after 8 hours differs naturally when the operation is continued for 8 hours in this state. Further, in the case of the automatic operation mode, the rotation mode of the fan is automatically switched according to the indoor state, so that it is difficult to predict the amount of dust attached after 8 hours. Also, the amount of adhesion is not constant depending on the amount of dust in the room.

[0006] Therefore, in the conventional system in which the execution timing of the dust removal mode is determined only by the operation time, the dust removal mode is executed even though the dust does not adhere much to the dust collection electrode, or the dust collection electrode is executed. There is a problem that the dust removal mode is not executed even though the dust adheres to a certain amount or more.

[0007] By the way, dust generated in a general household is mainly dust from a carpet or a tatami mat, dust generated by raising or lowering a futon, smoke from cigarettes, and the like. These are all combustible dusts. Also, for example, fat contained in cigarette smoke contains moisture. Therefore, when dust containing water such as tobacco fat adheres to the dust collecting electrode, the electric conductivity increases. In addition, when a large amount of dust adheres to the surface of the dust collection electrode and the distance from the discharge electrode becomes short, the electric conductivity further increases. This means that the current value flowing on the primary side and the secondary side of the high-voltage unit of the dust collecting device increases according to the amount of dust attached to the dust collecting electrode.

On the other hand, when a large amount of dust or the like adheres to the dust collecting electrode, the electric conductivity may be reduced. In other words, there is a possibility that the dust may include a type that lowers the electrical conductivity by attaching to the dust collecting electrode. This means that the value of the current flowing on the primary side and the secondary side of the high-voltage unit of the dust collecting device decreases in accordance with the amount of dust attached to the dust collecting electrode. The present invention has been made in view of such a point, and an object of the present invention is to almost accurately determine the amount of dust adhering to the dust collection electrode, and to execute the dust removal mode at an appropriate timing. An object of the present invention is to provide an electric device having an air purifying function as described above.

[0009]

In order to solve the above-mentioned problems, an electric appliance having an air purifying function according to claim 1 of the present invention comprises a high-voltage unit connected to a power supply and a discharge electrode connected to the high-voltage unit. And a dust collecting device including a dust collecting electrode, and discharges purified air to the outside by collecting dust and dirt contained in the external air sucked by the rotation of the fan by the dust collecting device. In an electric appliance having an air purifying function, a current value measuring unit for measuring a current value of a primary side or a secondary side of the high voltage unit as needed, and the collecting unit based on a change in a current value measured by the current value measuring unit. A configuration is provided that includes a dust collection amount determination unit that determines the dust collection amount of the dust electrode.

Further, an electric device having an air purifying function according to claim 2 of the present invention is the electric device according to claim 1,
The dust collection amount determination unit is configured to output an instruction signal indicating a cleaning start condition of the dust collection device when a current value measured by the current value measurement unit exceeds a predetermined current value width. And

According to a third aspect of the present invention, there is provided an electric appliance having an air purifying function according to the second aspect of the present invention.
A configuration including a control unit that executes a dust removal mode in which a heating unit provided on the dust collection electrode is heated based on an instruction signal from the dust collection amount determination unit to remove dust attached to the dust collection electrode. And

According to a fourth aspect of the present invention, there is provided an electric apparatus having an air purifying function according to the third aspect of the present invention.
The control unit executes the dust removal mode at the end of the operation of the electric device based on the instruction signal from the dust collection amount determination unit. The current value measured by the value measurement unit is set as the reference current value and the constant current value width is set.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a cross-sectional view of an electric device having an air purifying function of the present invention, as viewed from a side.
This embodiment shows an example in which the present invention is applied to an air conditioner. This air conditioner has a front surface opened as a suction port 2, a case body 1 provided with a discharge port 3 below the suction port 2 (below the front face), and a suction port 2 of the case body 1.
Openable front panel 10 attached to the case and case body 1
A heat exchanger 20 provided in the case main body 1 facing the suction port 2 of the first embodiment, and a rear side of the discharge port 3 for flowing air from the suction port 2 to the discharge port 3 through the heat exchanger 20. The apparatus includes a cross-flow fan 30 provided in the vicinity and an electronic dust collector 40 arranged in an air passage on the back side of the heat exchanger 20.

The top plate 4 and the front panel 1 of the case body 1
An upper surface grill 5 and a front surface grill 11 for sucking air are respectively formed on the front surface of the front grille 0. An angle-adjustable louver 6 is provided at the discharge port 3 of the case body 1, and an air filter 50 is provided between the front panel 10 and the heat exchanger 20. A heat shield plate 48 is attached to the surface of the vertical back plate 7 of the case main body 1, and a dust collector 40 is attached to the front of the heat shield plate 48.

That is, the dust collecting device 40 is provided with the structure shown in FIGS.
As shown in the figure, a cylindrical dust collecting electrode 41 provided horizontally.
A discharge electrode 42 extending horizontally at a position slightly above the dust collecting electrode 41 and a rod-shaped heater (such as a sheathed heater) 43 for removing dust adhering to the dust collecting electrode 41. Have. The dust collecting electrode 41 includes a heater 43.
Is provided in a shape inward, and the heater 4
3 supports the heat shield plate 48 horizontally. The dust collecting electrode 41 has both ends bent in a direction away from the discharge electrode 42, and springs 44, 44 attached to both ends of the dust collection electrode 41 to stretch the discharge electrode 42 on the heat shielding plate 48. Is maintained so as to maintain a constant distance at which no discharge occurs. A ceramic catalyst such as alumina or zeolite is deposited on the surface of the dust collecting electrode 41.

With such a structure, the dust collector 40 and the heat shield plate 48 both follow the air flow from the top to the bottom in the air passage on the back side of the heat exchanger 20. Next, the operation of the air conditioner having the above configuration will be described. During the automatic operation of the air conditioner, the indoor air flows from the front grill 11 of the front panel 10 and the upper grill 5 of the case main body 1 by the operation of the fan 30 as shown by the solid arrow in FIG. After flowing into the main body 1 and passing through the heat exchanger 20, the air moves from the top to the bottom in the air passage on the back side, and is discharged into the room from the discharge port 3 through the fan 30.

At this time, a dust collector 40 is provided in the air passage on the back side of the heat exchanger 20 and its discharge electrode 4
A high voltage is applied between 2 and the dust collection electrode 41.
As a result, electric lines of force are generated between the discharge electrode 42 and the dust collection electrode 41 as shown by a broken line in FIG. 4, whereby the dust 60 existing in the air around the discharge electrode 42 is ionized, It is attracted to and adheres to the dust collecting electrode 41. As a result, the air that has passed through the heat exchanger 20 is purified in the process of passing through the air passage on the back side thereof, and is discharged again into the room.

FIG. 1 shows an electrical configuration of the air conditioner including a circuit configuration for executing a dust removal mode for removing dust 60 attached to the dust collecting electrode 41 by such automatic operation. That is, the key input unit 72 to which various keys necessary for operating the air conditioner such as the operation key 72a and the operation stop key 72b are connected is connected to the microcomputer control unit 71 which controls the operation of the entire air conditioner. ing.

The microcomputer control unit 71 controls a cooling / heating driving system 73 having a well-known refrigeration cycle (not shown), and controls a fan driving unit 74 to rotate the fan 30 in an arbitrary rotation mode. As the rotation mode of the fan 30, for example, three types of rotation modes “strong”, “medium”, and “weak” are set.

On the other hand, the dust collector 40 is provided with an AC of 100 V AC.
A rectifier circuit 75 for rectifying the C power supply, and a high-voltage unit 77 connected to the rectifier circuit 75 via an open / close switch 76.
And the discharge electrode 42 and the dust collecting electrode 41 connected to the high-voltage unit 77.
1 controls opening / closing of an opening / closing switch 76 so that the discharge electrode 42
And a high voltage is applied to the dust collecting electrode 41. A current sensor (for example, a current sensor or the like) 78 is provided on the primary side of the high-pressure unit 77, and the output of the current sensor 78 is transmitted to a dust collection amount determination unit 80 via a current value measurement unit 79. Has been. The output of the current value width storage unit 81 that stores a preset current value width is guided to the dust collection amount determination unit 80, and the output of the dust collection amount determination unit 80 is transmitted to the microcomputer control unit 71. Has been.

The microcomputer control section 71 controls the heater driving section 82 to energize the heater 43 to heat the heater 43 and remove dust adhering to the surface of the dust collecting electrode 41 (dioxide by reaction with the catalyst). Decomposes into carbon and water). Further, the output of the microcomputer control unit 71 is connected to an alarm unit 83 that notifies the contamination of the dust collecting electrode 41.
The current value width stored in the current value storage unit 81 serves as a comparison reference for the change in the current value measured by the current value measurement unit 79, and is set in advance by experiments or the like.

As described in connection with the problem to be solved by the present invention, the value of the current flowing to the primary side of the high-voltage unit 77 is considered to increase or decrease according to the amount of dust attached to the dust collecting electrode 41. Therefore, the dust collecting electrode 41
Current flowing to the primary side of the high voltage unit 77 when no dust adheres to the primary side of the high voltage unit 77 when the amount of dust adhering to the dust collecting electrode 41 reaches an amount requiring cleaning. May be stored in the current value storage unit 81 as a current value width. In this case, the value of the current flowing to the primary side of the high-voltage unit 77 may increase or decrease depending on the type of dust. Therefore, the current value width is defined by the current value width when increasing and the current value width when decreasing. The added width.

FIG. 6 is a graph showing an experimental result for setting the current value width stored in the current value width storage unit 81. This experimental result is a comparison result between the amount of smoke emitted when the dust collector 40 is operated in a space of 1 m ³ and smoke is absorbed in this space, and the current value flowing to the primary side of the high-pressure unit 77. Is shown. According to the results of this experiment, the value of the current flowing to the primary side of the high voltage unit 77 is 22 mA in a state where no dust adheres to the dust collecting electrode 41 (0 cigarettes). On the other hand, the amount of dust adhering to the dust collecting electrode 41 reaches the amount that requires cleaning, which is equivalent to 15 tons of cigarettes.
From about 20 to the high pressure unit 77 at this point.
Is approximately 27 mA.

From the results of this experiment, as shown in FIG. 5, for example, when the on / off switch 76 is closed with no dust attached to the dust collecting electrode 41, the current value flowing to the primary side of the high voltage unit 77 ( That is, the current value measured by the current value measuring unit 79) is 22 mA, and the dust collection electrode 4
When the amount of dust adhering to 1 reaches an amount requiring cleaning, the value of the current flowing to the primary side rises by 27 m.
A, assuming that the current is 17 mA in the case of a decrease, the current value width stored in the current value storage unit 81 is ± 5 mA. However, the present invention is not limited to this, and may be set to, for example, ± 4 mA, which is a little narrower.

By the way, only the current value width (for example, ± 5 mA) is stored in the current value width storage section 81, and a reference current value (dust does not adhere to the dust collecting electrode 41) for setting this current value width. When the open / close switch 76 is closed in a state where the switch is not turned on, nothing is determined about the current value flowing to the primary side of the high voltage unit 77).

This is because the reference current value changes depending on the operating environment. For example, the reference current value 2 shown in FIG.
Assuming that 2 mA is a value under conditions such as an indoor temperature of 20 ° C. and a humidity of 60%, for example, when the humidity is 100
%, The reference current value is higher than 22 mA even if the state of the dust collecting electrode 41 is exactly the same. When the humidity is low (for example, 20% or 30%) because the air conditioner performs the dehumidifying operation,
Even if the state of the dust collecting electrode 41 is exactly the same,
The reference current value is lower than 22 mA. In addition to the operating environment, the reference current value also changes depending on the distance between the discharge electrode 42 and the dust collecting electrode 41, the shape and diameter of the dust collecting electrode 41, and the like. Therefore, it is not meaningful to uniquely determine the reference current value from the beginning.

However, the reference current value is an indispensable value for comparison with the current value measured by the current value measuring section 79. Therefore, in the present embodiment, attention is paid to the point that the reference current value changes depending on the operating environment, and the dust removal mode is executed at the end of the operation of the air conditioner to completely remove the dust attached to the dust collection electrode 41. At the start of the operation of the air conditioner, the current value is measured by the current value measuring unit 79, and the measurement result is used as the reference current value. That is, a range obtained by adding the current value width (± 5 mA in this example) stored in the current value width storage unit 81 to the reference current value is defined as a range corresponding to the current value measured as needed by the current value measurement unit 79 after the start of the operation. The comparison current value range X is set.

For example, in the example shown in FIG. 5, when the current value (reference current value) measured by the current value measuring unit 79 at the start of the operation of the air conditioner is 22 mA,
The comparison current value range X for determining the dust collection amount of the dust collection electrode 41 is in the range of 17 mA to 27 mA. When the current value measured by the current value measuring unit 79 at the start of the operation of the air conditioner is, for example, 25 mA, the comparison current value range X for determining the amount of dust collected by the dust collecting electrode 41 is 2
If the current value measured by the current value measuring unit 79 at the start of the operation of the air conditioner is, for example, 19 mA, the comparison current for determining the dust collection amount of the dust collection electrode 41 is in the range of 0 mA to 30 mA. The value range X ranges from 14 mA to 2
The range is 4 mA. That is, since the reference current value can be set to an appropriate value according to the operating environment at the start of the operation of the air conditioner, the amount of dust collected by the dust collecting electrode 41 can be determined more accurately.

After the start of the operation of the air conditioner, the dust collection amount determination unit 80 compares the current value measured by the current value measurement unit 79 as needed with the reference current value range X based on the reference current value set at the start of the operation. When the measured current value exceeds the comparison current value range X, an instruction signal indicating the cleaning start condition of the dust collecting device 40 is output to the microcomputer control unit 71. The microcomputer control unit 71 executes the dust removal mode at a predetermined timing based on the instruction signal from the dust collection amount determination unit 80. That is, the heater driving unit 82 is controlled to energize the heater 43, and the heater 43 is heated to remove dust attached to the dust collecting electrode 41.

The alarm unit 83 is constituted by, for example, an LED, a buzzer, a voice synthesizing circuit, and the like. When the amount of dust adhering to the dust collecting electrode 41 reaches an amount that requires cleaning, the microcomputer control unit is used. In response to an instruction from 71, the LED flashes or lights, a buzzer sounds, or a sound such as "Please execute the dust removal mode." Has caused the amount of dust attached to the amount requiring cleaning. Thing: inform the user.

Next, the operation of the air conditioner having the above configuration in the dust collection mode and the dust removal mode will be described. When the operation key 72a is pressed, the microcomputer control unit 71 executes the automatic operation mode. That is, the cooling / heating driving system 73 is controlled so that the room temperature becomes a preset room temperature, and the rotation speed of the fan 30 is controlled while being switched between high, medium, and low. At this time, the microcomputer control unit 71 operates the operation key 72a.
Is pressed, the open / close switch 76 is closed and the dust collecting electrode 41 is closed.
And a high voltage is applied to the discharge electrode 42. Then, the current value flowing to the primary side of the high voltage unit 77 is measured by the current value measuring unit 79 via the current sensor 78, and the measured current value is input to the dust collection amount determining unit 80.

The dust collection amount determining section 80 sets the measured current value as a reference current value and stores the reference current value in the current value storage section 81.
Is set internally as a comparison current value range X. Here, when the current value measured by the current value measuring unit 79 at the start of the operation of the air conditioner is 22 mA, the comparison current value range X is 17 m
A is set in the range of 27 mA from A (see FIG. 5).

Thereafter, the air conditioner continues the automatic operation,
When the dust collecting device 40 also continues the dust collecting operation (keeps the open / close switch 76 closed), dust adheres to the dust collecting electrode 41 with time. At this time, when the attached dust is dust that can contain moisture such as tobacco oil, the current flowing on the primary side of the high-voltage unit 77 increases as the amount of dust attached to the dust collecting electrode 41 increases. (See FIG. 5). This current value is measured at any time by the current value measuring unit 79, and the measured current value is input to the dust collection amount determining unit 80 as needed.

In the dust collection amount determination section 80, the comparison current value range X (17 mA to 2 mA) set at the start of the operation of the air conditioner is set.
7 mA) and a measured current value input from the current value measuring unit 79 as needed. When the measured current value exceeds the comparison current value range X at time t1 shown in FIG. 5 (in this case, when the measured current value exceeds 27 mA), the dust collection amount determination unit 80 sets the dust collection device 40 An instruction signal indicating the cleaning start condition is output to the microcomputer control unit 71.

Based on this instruction signal, the microcomputer control section 71 stops the cooling operation (or the heating operation) by pressing the operation stop key 72b, for example, and then stops the operation for a predetermined time (for example, 3
The dust removal mode is executed after elapse of 0 minute or the like. That is, the heater driving unit 82 is controlled to energize the heater 43, and the heater 43 is heated to remove dust adhering to the dust collecting electrode 41 (decompose into carbon dioxide and water by reaction with the catalyst). This dust removal mode is, for example, 18 minutes to 2 minutes.
This is performed for about 0 minutes, and the dust adhering to the dust collecting electrode 41 is gradually decomposed, so that odor, smoke and the like at the time of decomposition are not generated.

Further, the microcomputer control section 71 drives the alarm section 83 based on the instruction signal from the dust collection amount determination section 80 to blink or turn on the LED, sound the buzzer, or set the “dust removal mode”. Please do so. "Or the like, to inform the user that the amount of dust attached has reached an amount that requires cleaning.

In the above embodiment, the dust collection amount determining unit 8
After the operation stop key 72b is pressed based on the instruction signal from 0 to stop the cooling operation (or the heating operation), the dust removal mode is executed after a predetermined time (for example, 30 minutes) elapses. However, the automatic operation of cooling or heating may be stopped when the instruction signal is input, and the dust removal mode may be executed at that time. That is, the timing at which the dust removal mode is executed based on the instruction signal may be arbitrarily set. However, even when the automatic operation is temporarily stopped and the dust removal mode is executed during the automatic operation, and then the automatic operation is continued, it is necessary to execute the dust removal mode again at the end of the automatic operation. Otherwise, an appropriate reference current value cannot be measured at the start of the operation.

In the above embodiment, the current flowing through the primary side of the high-voltage unit 77 at the start of the operation is measured by the current value measuring section 79, and the measured current value is used as the reference current value. Although a range obtained by adding the current value width stored in the value width storage unit 81 is set as the comparison current value range X inside the dust collection amount determination unit 80, this comparison current value range X itself is set. It may be stored in the current value storage unit 81 in advance. In this case, as described above, since the reference current value changes depending on the operating environment, the comparative current value range X may be set slightly wider in consideration of the change width.

In the above embodiment, the high-pressure unit 7
The current value flowing through the primary side of the high-pressure unit 77 is relatively obtained by measuring the current value flowing through the primary side of the dust collector 7 by the current value measuring unit 79. However, as shown by the broken line in FIG. 1, the current value flowing through the secondary side (that is, the
1 may be measured directly.
In the above embodiment, an air conditioner is taken as an example of the electric device of the present invention. However, the present invention can also be applied to an air purifier itself, a stationary oil, electric or gas fan heater, and the like.

[0040]

According to the first aspect of the present invention, there is provided an electric appliance having an air purifying function, comprising a high-voltage unit connected to a power supply, and a discharge electrode and a dust-collecting electrode connected to the high-voltage unit. In an electric device having an air purifying function of discharging the purified air to the outside by collecting dust and dirt contained in the external air sucked by the rotation of the fan by the dust collecting device, a high-pressure unit A current value measuring unit that measures the current value of the primary side or the secondary side as needed, and a dust amount determination unit that determines the amount of dust collected by the dust collecting electrode based on a change in the current value measured by the current value measuring unit. And a part. That is, since the amount of dust collection is determined based on the current value on the primary side or the secondary side of the high voltage unit, the amount of dust adhering to the dust collection electrode can be almost accurately determined.

According to a second aspect of the present invention, there is provided an electric appliance having an air purifying function, wherein when the current value measured by the current value measuring section exceeds a predetermined current value width, a dust collector is provided. Since the instruction signal indicating the cleaning start condition is output from the dust collection amount determination unit, the dust removal mode can be executed at an appropriate timing based on the instruction signal.

According to a third aspect of the present invention, there is provided an electric device having an air cleaning function, wherein a heating unit provided on the dust collecting electrode is heated based on an instruction signal from the dust collecting amount determining unit. Since the configuration is such that dust adhering to the device is removed, the maintenance-free dust removal mode can be executed at an appropriate timing.

According to a fourth aspect of the present invention, an electric device having an air purifying function executes a dust removal mode at the end of the operation of the electric device based on an instruction signal from a dust collection amount determining unit. The amount determination unit is configured to measure the current value by the current value measurement unit at the start of the operation of the electric device, and to set a constant current value width stored in the current value width storage unit as a reference current value as a measurement result. Therefore, the reference current value can be set to an appropriate value according to the operating environment at the start of the operation of the air conditioner, so that the amount of dust collected by the dust collection electrode can be determined more accurately.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electric configuration of an electric device having an air cleaning function of the present invention.

FIG. 2 is a cross-sectional view (end view) of the electric device having an air cleaning function of the present invention when viewed from a side surface.

FIG. 3 is a perspective view of a dust collector.

FIG. 4 is a diagram for explaining a dust collection principle of the dust collection device.

FIG. 5 is a graph showing a change in a current value measured by a current value measurement unit from the start of the operation of the air conditioner.

FIG. 6 is a graph showing experimental results for setting a current value width stored in a current value width storage unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case main body 20 Heat exchanger 30 Fan 40 Dust collector 41 Dust collection electrode 42 Discharge electrode 43 Heater 71 Microcomputer control part 72 Key input part 73 Cooling / heating drive system 74 Fan drive part 75 Rectifier circuit 76 Open / close switch 77 High voltage unit 78 Current sensor 79 Current value measurement unit 80 Dust collection amount determination unit 81 Current value storage unit 82 Heater drive unit 83 Alarm unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F24F 11/02 102 F24F 1/00 371B

Claims (4)

[Claims] A dust collector including a high-voltage unit connected to a power supply, and a discharge electrode and a dust-collecting electrode connected to the high-voltage unit is provided, and dust contained in external air sucked by rotation of a fan is removed. In an electric appliance having an air cleaning function of discharging purified air to the outside by collecting dust by the dust collecting device, a current value for measuring a current value of a primary side or a secondary side of the high-voltage unit as needed. It has an air cleaning function, comprising: a measurement unit; and a dust collection amount determination unit that determines a dust collection amount of the dust collection electrode based on a change in the current value measured by the current value measurement unit. Electrical equipment. 2. The method according to claim 2, wherein the dust collecting amount determining unit is configured to indicate a cleaning start condition of the dust collecting device when a current value measured by the current value measuring unit exceeds a predetermined current value width. The electric device having an air purifying function according to claim 1, wherein the electric device outputs a signal. 3. A control for executing a dust removal mode for heating a heating unit provided on the dust collection electrode and removing dust attached to the dust collection electrode based on an instruction signal from the dust collection amount determination unit. 3. The electric device having an air purifying function according to claim 2, further comprising a unit. 4. The control section executes the dust removal mode at the end of the operation of the electric device based on an instruction signal from the dust collection amount determination section. 4. The electric device having an air cleaning function according to claim 3, wherein the constant current value width is set using a current value measured by the current value measuring section at the start of operation as a reference current value.