KR101915544B1 - A washing machine with a selecting means for drying mode and a controlling method for the washing machine - Google Patents

Abstract

One embodiment of the dryer of the present invention comprises: a main body; A drum rotatably mounted in the main body; A heater pump system for heating the air supplied to the drum; A control panel provided in the main body and including a drying mode selecting means; And a controller for controlling the drum and the heat pump system and the heater in accordance with the instruction inputted by the drying mode selecting means, wherein the controller supplies the drum and the heat pump system to the drum in accordance with the instruction inputted by the drying mode selecting means And at least one of the heat pump system and the heater is selected and operated as a heat source for heating the air.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of controlling a dryer and a dryer,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dryer capable of drying clothes and the like, and more particularly to a dryer capable of selectively using at least one of a heat pump system and a heater as a heat source for heating air for drying an object to be dried, And more particularly, to a dryer and a method of controlling a dryer having drying mode selecting means that can shorten the drying time and simplify the selection.

2. Description of the Related Art Generally, a garment treating apparatus having a drying function such as a washing machine or a dryer is used to put laundry in a state in which a washing process is completed and a dehydrating process is completed into a drum, and hot air is supplied into the drum to evaporate moisture of the laundry, It is a drying device.

Examples of the dryer include a drum that is rotatably installed in the main body and into which laundry is introduced, a driving motor that drives the drum, a blowing fan that blows air into the drum, And a heating means. There may be a heater system that utilizes high-temperature electric resistance heat generated by electric resistance as the heating means, or uses combustion heat generated by burning gas.

On the other hand, the air exiting the drum has the moisture of laundry in the drum, and becomes hot and humid air. At this time, the dryer can be classified according to the method of treating the high temperature and high humidity air. The hot and humid air is circulated without being discharged to the outside of the dryer, and the air is cooled down to below the dew point temperature through the heat exchange means, A circulating type dryer for condensing the supplied moisture and re-supplying the moisture, and an exhaust type dryer for discharging the high-temperature and high-humidity air passing through the drum directly to the outside.

In the case of a circulating dryer, in order to condense the air discharged from the drum, the air is cooled down to below the dew point and heated through the heating means before being re-supplied to the drum. Therefore, when the heater is used as the heating means, a separate heat exchanging means for condensing the high temperature and high humidity air discharged from the drum is required, and the heat energy supplied by the heat exchanger is discharged to the outside by heat exchange with the heat exchanging means. In this case, there is an advantage that sufficient heat energy can be sufficiently supplied by using a heater, but there is a problem that thermal efficiency is lowered and energy is wasted. In addition, since moisture must be sufficiently removed to circulate the air, there is a problem that the volume of the heat exchanging means is increased and the drying time is increased.

Even in the case of an exhaust-type dryer, it is necessary to discharge hot and humid air to the outside, to introduce outside air at room temperature, and to heat it to a required temperature level through a heating means. When the heater is used as the heating means in the exhaust type dryer, there is an advantage that no separate heat exchanging means is required, and there is an advantage that the drying time is shortened by sufficiently supplying the necessary heat energy by using the heater. However, since the high temperature air discharged to the outside contains the thermal energy transferred by the heating means and is discharged to the outside as it is, there is a problem that thermal efficiency is lowered and energy is wasted.

Accordingly, recently, a dryer capable of increasing energy efficiency by recovering unused energy from the air discharged from the drum and heating the air supplied to the drum has been introduced. One example of such a dryer is a dryer having a heat pump system. The heat pump system includes two heat exchangers, a compressor and an inflator. The heat pump system recovers the energy of the hot air discharged from the refrigerant circulating through the system, and then heats the air supplied to the drum, thereby increasing energy efficiency.

Specifically, the heat pump system has an evaporator on the exhaust side from the drum and a condenser on the drum inflow side, and the heat energy is absorbed by the refrigerant through the evaporator and then heated to high temperature and high pressure by the compressor. Then, the heat energy of the refrigerant is transferred to the air flowing into the drum through the condenser, and hot air is generated using the waste energy.

However, in the case of a dryer using the above-described heat pump system, the performance of the system is determined by the capacity of a condenser capable of absorbing heat energy, the capacity of a condenser capable of discharging energy, and the capacity of a compressor compressing refrigerant. Ideally, the heat pump system should be designed in accordance with the required heat energy. However, the size and the capacity of the condenser and the evaporator, which are compressors and heat exchangers used in the dryer, are limited. Therefore, when the heat pump system is used as the heating means for heating the air supplied to the drum, the heat pump system has an advantage of being excellent in energy efficiency, but has a problem in that it is increased in the drying time due to the capacity limit of the heat pump system. Further, due to the characteristics of the heat pump system, there is a problem that the reliability of the heat pump system is not high due to overloading in the compressor or the like.

An object of the present invention is to provide a hybrid dryer capable of using both a heat pump system and a heater, which can increase the energy efficiency by using a heat pump system and further reduce the drying time by using a heater.

It is another object of the present invention to provide a control method of a hybrid drier capable of effectively preventing overload of a compressor and improving reliability of a heat pump system while using a heat pump system and a heater.

In addition, the user can selectively control the operation of the dryer depending on the viewpoint of the user, such as considering energy efficiency or drying time, so that the drying can be carried out only by the heat pump system or by the heater and heat pump system And it is an object of the present invention to provide a hybrid dryer having a means for the user to select whether the drying is proceeded, thereby enhancing user convenience.

SUMMARY OF THE INVENTION The present invention provides the following configuration to solve the above-described technical problems.

One embodiment of the dryer of the present invention comprises: a main body; A drum rotatably mounted in the main body; A heater pump system for heating the air supplied to the drum; A control panel provided in the main body and including a drying mode selecting means; And a controller for controlling the drum and the heat pump system and the heater in accordance with the instruction inputted by the drying mode selecting means, wherein the controller supplies the drum and the heat pump system to the drum in accordance with the instruction inputted by the drying mode selecting means And at least one of the heat pump system and the heater is selected and operated as a heat source for heating the air.

The control panel may further include display means, and the controller may display the drying mode selected by the drying mode selecting means on the display means.

The control panel may further include drying course selecting means for selecting a different drying method depending on the object to be dried, wherein the controller is configured to select a drying mode that can be selected by the drying mode selecting means in accordance with an instruction input by the drying course selecting means Mode can be displayed on the display means.

Here, the controller may display a predetermined drying mode on the display means in accordance with the instruction input by the drying course selection means, and set the event set drying mode displayed on the display means in accordance with the selection of the drying mode selection means, The drying mode selected by the mode selecting means can be changed.

The predetermined drying mode may be a drying mode using the heat pump system as the heat source for heating the air supplied to the drum, or a drying mode using the heat pump system and the heater.

Here, the controller displays a drying mode selectable by the drying mode selecting means at a position corresponding to the drying mode selecting means. Alternatively, the controller may display a drying mode selectable by the drying mode selecting means at an adjacent position corresponding to the drying mode selecting means.

The controller activates the drying mode selectable by the drying mode selecting means to the display means only when the drying course which can be selected by the drying mode selecting means is selected by the drying course selecting means.

On the other hand, the controller executes a drying course according to the instruction inputted by the drying course selecting means, and operates a heat source for heating the air supplied to the drum in accordance with the instruction inputted by the drying mode selecting means.

Particularly, the controller is configured such that, only when the drying course in which the drying mode can be selected by the drying mode selecting means is selected by the drying course selecting means, the air supplied to the drum in accordance with the drying mode selected by the drying mode selecting means A heat source for heating the heat source.

Alternatively, the controller may set the drying mode selected by the drying mode selection means or the predetermined drying mode to the predetermined drying mode only when the drying mode in which the drying mode is selectable by the drying mode selection means is selected by the drying course selection means Thereby operating a heat source for heating the air supplied to the drum.

For example, the controller may be configured to heat the air supplied to the drum only when a drying course capable of using a heat pump system and a heater as the heat source for heating the air supplied to the drum is selected by the drying course selection means Only when the drying mode using the heat pump system and the heater is selected as the heat source for heating the air supplied to the drum by the drying mode selecting means, the heat pump system and the heater can be operated as the heat source, The heat pump system and the heater are operated by the heat source which heats the air supplied to the drum.

The drying course selection means may comprise a rotatable dial knob, and the drying course selection means may be configured such that the drying courses, from which the drying mode can be selected, are distinguished by the drying mode selection means so that the dial knob or the dial knob It is marked around.

Alternatively, the control panel may further include drying course selection means for selecting a different drying method according to the object to be dried, wherein the drying mode selection means and the drying course selection means are classified according to different operation of one selection means, The controller may display the selected drying course and drying mode on the display means in accordance with the instruction inputted by the operation to the one selecting means.

In this case, for example, the one selection means is a rotatable dial knob, selectable drying courses and drying modes for each drying course are displayed around the dial knob, It is divided into modes and displayed. As another example, the one selection means is a push button or a touch button, and the drying courses and the drying modes for each drying course are changed according to the selected number of the push buttons or the touch buttons.

The controller can automatically change the heat source for heating the air supplied to the drum according to the temperature of the air passing through the drum or the temperature of the coolant of the heat pump system irrespective of the instruction inputted by the drying mode selecting means.

The drying mode may include a general drying mode in which only the heat pump system is operated as a heat source, and a high-speed drying mode in which the heat pump system and the heater are operated as a heat source. In the drying mode, there may be a special drying mode in which only the heater is operated as a heat source.

Meanwhile, the heat pump system includes an evaporator for performing heat exchange with the air discharged from the drum, a compressor, and a condenser and an expansion valve for heat-exchanging heat with the air supplied to the drum. Here, the capacity of the evaporator may be smaller than the capacity of the condenser.

Meanwhile, the control panel may further include a charge-saving mode selecting unit, wherein the controller heats the air supplied to the drum based on power information supplied from outside in accordance with the instruction input by the charge-saving mode selecting unit The starting point of the heat source may be controlled, or the heat source for heating the air supplied to the drum may be changed.

Alternatively, the dryer may control the starting point of the heat source for heating the air supplied to the drum based on power information supplied from the outside, or may change the heat source for heating the air supplied to the drum .

The energy management apparatus includes a display unit for displaying power information or the like supplied from the outside, an input unit for selecting the operation of the energy management apparatus, and a control unit for sending a control signal to the controller according to the command inputted by the input unit .

Meanwhile, an embodiment of a method of controlling a dryer that selects and uses at least one of a heat pump system and a heater as a heat source for heating air supplied to a drum may include adjusting the operation of the dryer based on power information supplied from the outside Determining whether a charge-saving mode is selected; A mode in which the operating time of the dryer is forcibly changed to a time period in which the electricity rate is low by the controller or a conditional application mode in which the use time of the dryer is changed or the use heat source is changed conditionally, Is selected; And changing the operation time of the dryer or changing a heat source to be used by the controller to drive the dryer when either the forced application mode or the conditional application mode is selected.

When the conditional application mode is selected, the step of driving the dryer may change the heat source according to the expected drying termination time of the dryer to drive the dryer.

According to the present invention, at least one of two different heat sources is used for drying, so that the energy efficient drying can be performed according to the user's selection, or the drying can be performed with a short drying time. Accordingly, it has an effect of reducing energy consumption and enhancing user convenience.

In addition, the user can easily switch the drying mode, and the user can easily recognize the drying mode, thereby improving user convenience.

Further, it is possible to determine the effective time of the dryer, thereby saving electricity costs.

In addition, the present invention has the effect of improving the reliability of the heat pump system by effectively preventing the overload of the compressor while using the heat pump system and the heater by using two heat sources which are stably different from each other.

In addition, the present invention has an effect that stable drying is progressed by controlling the drying object so as not to be damaged even if drying is performed using two different heat sources.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the appearance of a dryer, which is one embodiment of the present invention; FIG.
Figure 2 is a schematic diagram showing the interior of the dryer of Figure 1;
FIG. 3 is a schematic view showing a heat pump system provided in the dryer of FIG. 2;
Figure 4 is a schematic diagram showing the heat pump system and operating loads mounted to the dryer of Figure 1;
5 is a schematic view showing the contact between the air flow path and the heat source of the dryer, which is one embodiment of the present invention.
6 is a schematic view showing an electrical connection for controlling a dryer, which is an embodiment of the present invention;
7 is a schematic diagram showing an embodiment of a control panel of a dryer.
8 is a schematic diagram showing another embodiment of the control panel of the dryer.
Figure 9 is a schematic diagram showing control of the devices by the control panel of Figure 7;
10 to 12 are schematic views showing various examples displayed on the control panel of Fig. 7; Fig.
13 is a schematic view showing a dryer control by an energy management apparatus provided in a dryer, which is one embodiment of the present invention.
Figure 14 is a graph showing an example of a variable electricity rate over time.
Figures 15 and 16 are flow charts illustrating dryer control for saving electricity bills of the present invention.
17 is a flowchart showing the heater operation control according to whether the compressor of the heat pump system is normally operated.
18 is a flow chart showing filter clogging control according to whether or not the filter is clogged during the initial operation of the heat pump system.
FIGS. 19 and 20 are flow charts showing filter clogging control during drying after filter clogging control of FIG. 18;
Figures 21 and 22 are flow charts showing compressor temperature control of a heat pump system.
Figures 23 and 24 are flow charts showing compressor temperature control of the heat pump system under overload conditions.
25-27 are flow charts illustrating the control of the operation of the various loads of the dryer.
28 to 30 are flow charts showing the operation control of the heat pump system for the leakage current interruption;
Figure 31 is still showing the expansion valve control for the actuation control of the heat pump system of Figures 28 and 29;
32 and 33 are flow charts showing the temperature control of the drum.
34 and 35 are flow charts showing the cooling control for cooling the drum.
36 and 37 are flow charts showing the anti-creasing control for controlling the drive motor of the drum for anti-creasing.
38 is a flow chart showing the OLP heater control that occurs when the compressor of the heat pump system is shut down;
39 is a flow chart showing the load operation control centering on the operation and the end of the heat source.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing an appearance of an embodiment of a clothes dryer of the present invention. Referring to FIG. 1, a dryer 100 includes a main body 110 forming an outer tube, and a drum 10 rotatably installed in the main body and having a plurality of lifters protruding from an inner peripheral surface thereof. In the front of the main body, a charging port 140 for charging clothes, which are objects to be dried, into the main body is formed.

The input port 140 is opened and closed by a door 130 and a control panel 120 having various operation buttons and a display device for operating the dryer is positioned above the input port 140. A drawer 150 is provided at one side of the control panel 120 and a liquid or the like to be sprayed onto the drum may be stored inside the drawer 150.

Figures 2 and 3 are schematic diagrams showing the interior of the embodiment of Figure 1; Referring to FIG. 2, the drum 10 is rotatably installed in the main body 110, and the drum 10 is drivable from the inside thereof. The drum 10 has a supporter And is rotatably supported.

The drum 10 is connected to a driving motor 20 provided at a lower portion of the dryer by a power transmission belt 22 to receive rotational force. The drive motor 20 is provided with a pulley 21 on one side thereof and connected to a power transmission belt 22 for driving the drum.

A suction duct 50 is installed in the rear of the drum 10 and a heater 40 is installed in the suction duct 50 to heat the air sucked into the suction duct 50. The heater 40 may be formed by using a high-temperature electrical resistance column to increase the efficiency of the space occupied in the dryer. The suction duct is connected to the rear of the drum and may have a discharge port 51 for discharging the heated air to the drum.

A filter 65 for filtering foreign substances such as lint contained in the air discharged from the drum 10 is provided in the front lower side of the drum 10 and an exhaust duct for discharging the air after filtering the foreign matter from the drum (60). The suction duct and the exhaust duct are divided into suction and exhaust with respect to the drum. Here, FIG. 2 shows an embodiment of a circulating dryer, but the present invention is not limited to this and can be applied to an exhaust system.

2, the suction duct 60 and the exhaust duct 50 are integrally connected to each other to form a circulation flow path 55. In this embodiment, However, in the case of an exhaust-type dryer (not shown), the suction duct and the exhaust duct are not connected.

The exhaust duct (60) is provided with a blowing fan (30) for sucking the air in the drum (10) to blow air forcibly. For example, in the case of the circulation type dryer of FIG. 2, the exhaust duct serves to guide the air forced by the blowing fan 30 to the drum through the suction duct. However, in the case of an exhaust-type dryer, the exhaust duct serves to guide air forced to be blown by the blowing fan 30 to the outside.

The air blowing fan 30 shown in this embodiment may be a full type blowing fan that exists on a duct through which the air is exhausted from the drum and sucks the air discharged from the drum toward the exhaust duct.

As described above, a pulley is provided at one side of the driving motor 20 to connect the power transmission belt 22 for driving the drum. The other side of the driving motor 20 drives the blowing fan 30 And is connected to the drive shaft of the blowing fan. Therefore, in the embodiment of FIG. 2, when the driving motor rotates, the drum and the blowing fan rotate at the same time. A system that simultaneously drives a drum and a blower fan using one motor is called a 1-motor system. However, a separate driving motor for driving the blower fan may be provided, but this is disadvantageous in that the structure is complicated and the cost is increased.

In the embodiment shown in FIG. 3, a heat pump system 70 for absorbing waste heat from the air discharged from the drum and supplying the waste heat to the air introduced into the drum is provided. The embodiment of FIG. 3 may be a circulating dryer or an exhaust dryer.

The heat pump system 70 includes a first heat exchanger 71 for absorbing waste heat from the air exhausted from the drum, a compressor 72, and a second heat exchanger (not shown) for heating the air discharged into the drum 73, and an expansion valve 74 to constitute a thermodynamic cycle. That is, the first heat exchanger, the compressor, the second heat exchanger, and the expansion valve are connected by piping in order.

Fig. 4 shows an example in which such a heat pump system is mounted on the body of the dryer. Referring to FIG. 4, the first heat exchanger 71 may be referred to as an evaporator based on the refrigerant of the heat pump system, and the second heat exchanger 73 may be referred to as a condenser. The first heat exchanger and the second heat exchanger have a structure in which one refrigerant pipe is arranged in a meandering manner and a heat radiating fin is provided on the surface thereof to secure a heat transfer area with air.

Here, the evaporator may have the same or smaller heat exchange capacity than the condenser. That is, although the evaporator shown in FIG. 4 has the same heat exchange capacity as that of the condenser, unlike FIG. 4, the evaporator may be designed to be smaller than the condenser. This is to recover the waste heat so as to heat the air which is introduced into the drum as much as possible. In addition, it is intended to maximize the energy absorbed by the refrigerant through the condenser, thereby securing the reliability of the heat pump system.

Various types of the expansion valve 74 may be used, but in this embodiment, a linear expansion valve (LEV) whose opening degree is controlled by an electrical signal is used. That is, the opening degree of the valve can be determined by receiving the input pulse by the controller 200, which will be described later. A more detailed description will be given later.

5 shows a heating path through a heat pump system and a heater to air circulated in an example of a circulating dryer. Referring to FIG. 5, the refrigerant of the heat pump system exchanges heat with hot and humid air exiting the drum in the evaporator, which is a first heat exchanger, and becomes a low-temperature gas state, and is compressed in the compressor to become a gas state of high temperature and high pressure. Thereafter, the refrigerant undergoes heat exchange with cold air entering the drum in the second exchanger, which is the second exchanger, to be in a low temperature and high pressure state, and is expanded in the expansion valve to become a low temperature and low pressure liquid state.

Here, in the case of the circulating dryer, the moisture is evaporated from the drying object through the drum, and the hot and humid air is cooled through the heat exchange with the first heat exchanger described above to be in a low temperature and dry state in which moisture is removed, . However, in the case of an exhaust-type dryer, the moisture is evaporated from the object to be dried, and the hot and humid air is cooled through heat exchange with the first heat exchanger described above, and is discharged into the outside as moisture is removed.

At least one of a condenser or a heater 40, which is the second heat exchanger, may be used as a heat source for heating the air flowing into the drum to a high temperature. The air introduced into the drum at such a high temperature flows into the lower front side of the drum after the drying objects are dried, passes through the lint filter, and then passes through the exhaust duct again.

Here, the heater may be selectively used. This is because, when heating the air using only the heat pump system as the heat source, it is excellent in terms of energy efficiency, but has a problem that the drying time is long, so that the drying time can be reduced by using the heater as a supplementary heat source . However, depending on the selection, only the heater may be used as a heat source. Such a heat pump system and a heater that are selectively used to perform drying can be referred to as a hybrid dryer.

On the other hand, when the heater is selectively used, the heat pump system may be used as a main heat source and the heater may be used as an auxiliary heat source. This is the heat pump system as a main heat source in terms of energy efficiency as described above. In such a case, the main heat source may be configured so that the heat supply capacity of the heat pump system is larger than the heat supply amount of heat of the heater. As described above, since the heat pump system is used as the main heat source, the heat supply amount is varied according to the heat source to increase the efficiency.

The aspect of the above-described configuration can increase the energy efficiency by recovering unused energy from the air discharged from the drum and reusing it to heat the air supplied to the drum. In addition, a heat source as well as a heat pump system can be used as a heat source for heating the air supplied to the drum, so that the drying time can be shortened.

Meanwhile, since the clothes dryer of the present invention uses a heat pump system to maximize the energy efficiency, the refrigerant must be continuously circulated in the heat pump system. In this case, the heat pump system performs heat exchange with the air to be supplied to the drum by the phase change of the refrigerant. That is, in the heat pump system, the liquid state and the gaseous state refrigerant coexist on the refrigerant flow path.

If a sufficient amount of heat is not obtained at the evaporator side, a part of the refrigerant discharged from the evaporator flows into the compressor in a liquid state. When the liquid refrigerant is introduced into the compressor, the compressor is damaged, Which may cause problems in the reliability of the heat pump system.

Accordingly, in order to detect this, the temperature difference of the refrigerant passing through the evaporator can be sensed, and the quality of the refrigerant can be indirectly confirmed through the detection. The embodiment of FIG. 5 includes the temperature sensor 213 on the inflow side of the evaporator and the temperature sensor 214 on the inflow side of the evaporator or the inflow side of the compressor, respectively.

Further, since the heater can be used as a heat source, thermal load can be accumulated in the heat pump system. Thereby overloading the compressor. Therefore, it is necessary to measure the temperature of the refrigerant on the inflow side and the outflow side of the compressor in order to detect the overload of the compressor. In the embodiment of Fig. 5, the temperature sensor 214 is provided on the inflow side of the above-mentioned compressor, and the temperature sensor 215 is provided on the outflow side of the compressor.

In addition, the clothes dryer is for drying the object to be dried containing hot water by supplying hot air, and the object to be dried must be prevented from being damaged by hot air. Accordingly, the temperature of the inlet side is controlled so as to prevent the air flowing into the drum from being excessively overheated, and the temperature of the outlet side of the drum is controlled so that the drying degree of the object to be dried in the drum becomes sufficient, It measures the temperature. Therefore, the temperature sensor 211 is provided on the drum inlet side of the air supplied to the drum, and the temperature sensor 212 is provided on the drum outlet side of the air discharged from the drum. In addition, in order to precisely control the degree of drying of the object to be dried contained in the drum, a humidity sensor 220 may be provided inside the drum where the object to be dried can be contacted.

In the present embodiment, the temperature sensors 210, 211, 212, 213, 214, and 215 may preferably use a thermistor. 6 shows various devices electrically connected to the controller. Referring to FIG. 6, the temperature sensors 210 and the humidity sensor 220 are electrically connected to the controller 200 provided in the dryer, and provide a signal corresponding to the measured temperature and humidity to the controller. The controller controls the refrigerant flow rate of the heat pump system 70 through the expansion valve 74 and controls the operation of the compressor 72 and the heater 40 of the heat pump system 70, Controls the driving motor 20 to control the driving of the drum and the blowing fan 30, etc., and controls the cooling fan 80 and the like to be described later. Embodiments of this specific control will be described in more detail below.

In addition, in order to ensure the reliability of the heat pump system due to overload of the compressor, the compressor may be provided with a circuit breaker (OLP) capable of forcibly stopping the operation of the compressor.

In addition, the heat pump system of the embodiment shown in FIG. 4 may include a third heat exchanger 75, which is a secondary condenser for subcooling the refrigerant to suitably maintain the state of the refrigerant flowing into the expansion valve. This means that the refrigerant flowing into the expansion valve must enter the liquid phase, and the flow of refrigerant in the expansion valve may be blocked due to entering the gas phase. Therefore, in order to prevent this, a secondary condenser 75 is provided to cool the refrigerant in a subcooled state.

Subcooling the refrigerant by the secondary condenser also has an effect of preventing overload of the compressor. That is, when the refrigerant is sub-cooled and the pressure is lowered through the expansion valve, the refrigerant in the evaporator as the first heat exchanger can absorb heat from the air discharged from the drum more smoothly, So that it is possible to prevent the compressor from being overloaded.

In order to increase the efficiency of the secondary condenser, a separate cooling fan 80 may be provided. The cooling fan 80 is installed in the main body of the dryer, and introduces outside air into the main body through a suction port 111 formed in the main body. Accordingly, it is possible not only to increase the efficiency of the secondary condenser and to prevent the overload of the compressor, but also to cool the compressor by introducing outside air into the dryer. This has the effect of reducing the overload of the heat pump system. Furthermore, as in the present invention, it is more efficient when the compressor is overloaded in the hybrid drier having the heater, which is a heat source separate from the heat pump system. The cooling fan 80 is controlled by the controller 200 described above.

Meanwhile, the filter 65 shown in FIG. 3 filters foreign substances that may be contained in the air discharged from the drum. In particular, in a dryer employing a heat pump system for reusing air discharged from a drum and cooling it through a heat exchanger to remove moisture, foreign substances such as lint must be removed through a filter. This is because the heat exchanger such as the evaporator of the heat pump system is disposed on the air flow path through the exhaust duct, so that foreign substances in the air accumulate in the evaporator and overload may occur in the compressor. Therefore, when the dryer is operated and the heat pump system is operated, it is necessary to confirm whether or not the filter is mounted.

(Not shown) in the filter, and a reed switch (not shown) may be provided in the main body of the dryer to which the filter is to be mounted. Accordingly, when the filter is mounted, the reed switch is brought into contact with the magnet by the magnet. More preferably, the heat pump system is controlled to be operated only after it is confirmed that the filter is installed.

In addition, although the foreign matter in the air is blocked by the filter, foreign substances may accumulate in the heat exchanger due to residual foreign matter. A cleaning system (not shown) may be provided to spray water onto the surface of the heat exchanger to remove such foreign matter. The washing water used herein may be water condensed by heat exchange with water in the air discharged from the drum by the evaporator.

The water condensed in the air discharged from the drum by the heat exchange with the evaporator can be discharged to the outside by the pump 90 provided in the lower part of the main body of the dryer. Or may be re-supplied to the cleaning system described above by a pump. The pump 90 may be a BLDC pump.

Meanwhile, the dryer of the present embodiment may further include a steam injection system (not shown) capable of spraying steam to the object to be dried. The steam injection system may be configured to receive water through a drawer provided on a front surface of the drum, and may generate steam through a steam generator after the supplied water is pressurized by a pump. Thereafter, the steam is sprayed to the drum, and the water which has not been steamed is sent to the pump side provided at the lower part of the main body and discharged to the outside or can be reused.

The drying process of the drying object by the dryer can be seen as a process of evaporating water by supplying heated air (hot air) into the drum as described above. Here, for convenience, the drying process can be subdivided based on the drying degree of the drying subject.

For example, in an early stage of drying, a dry process of the object to be dried, an iron process having a humidity suitable for ironing the object to be dried out of the dryer, the object to be dried is taken out of the dryer, And a cooling process in which the object to be dried is cooled so as to have a humidity and a temperature that can be immediately taken out of the dryer and taken out of the dryer. . However, the above-described processes are merely a classification of the degree of humidity (or degree of drying) necessary for the user of the dryer, and the drying process proceeds uniqe. However, depending on the user's choice, the drying may be terminated at some stage in the drying process, and the heat energy and time supplied in each process may vary depending on the material of the drying subject.

Meanwhile, a steam injection process may be further provided to spray steam into the drum during the drying process according to a user's selection. Alternatively, a steam sterilization process having an effect of sterilizing an object to be dried instantaneously by the high-temperature steam may be additionally provided in the garment being used or the garment being stored as a separate process. In addition to the above-described drying process, a steam refreshing process may be additionally performed to remove wrinkles and wrinkles of the clothing being used or clothes being stored, or to spray steam for deodorization or the like.

On the other hand, if the drying object is not taken out from the inside of the dryer even after the completion of the drying process and a considerable time passes, new wrinkles and creases may be generated. In order to prevent this, in the present embodiment, a wrinkle preventing process may be further provided to periodically flow the drying object until the user removes the drying object after the drying process is completed according to the user's selection.

The above-described drying process is applied to a hybrid dryer in which both a heat pump system and a heater can be used. However, the heat source to be used may vary, differences in drying time may occur, and differences may occur in energy efficiency.

In terms of energy efficiency, it is a general drying mode to use the heat pump system as the heat source to supply the drum and to perform the drying process. In addition, it is a high-speed drying mode to use the heat pump system and the heater as a heat source in order to reduce the drying time while considering the energy efficiency. Further, the drying process is performed using only the heater as a heat source in a special drying mode. The name of the drying mode is merely a matter of convenience, and is merely for discriminating the difference in the heat source for heating the air supplied to the drum.

In the dryer of the above-described embodiment, both the general drying mode and the high-speed drying mode can be applied by the user's selection. The special drying mode can also be applied by selection.

In each of the drying modes, there is a difference in heat energy supplied per hour because the heat sources used are different, and the heat load applied to the heat pump system also varies. Therefore, the control of the heat source and the like in each drying mode is different. More details will be described later.

Meanwhile, the control panel has means for the user to select various drying courses and drying modes, to confirm them, and to know various operating conditions of the dryer. 7 shows an embodiment of the control panel.

Referring to FIG. 7, the control panel 120 includes a dial knob and a plurality of buttons as input means or selection means, and a display device as display means. On the other hand, the dryer to which the control panel of FIG. 7 is mounted is provided with a controller 200 for controlling the devices of the dryer in accordance with the instruction inputted by the input means or the selecting means, and controlling the devices to be displayed on the display device.

The input means or the selection means allows the user to select a course which is pre-programmed in advance or to allow the user to select only a specific function. The input means or selection means can be implemented in various examples. Although only the dial knob and the push button are shown in Fig. 7, the present invention is not limited to this. For example, the input means may include a touch button, a voice recognition function, a motion recognition function, etc. of the touch screen.

9 shows that the input means and the display means are electrically connected to the controller 200 to control the driving motor 20, the heat pump system 70, the heater 40, and the like, which are devices of the dryer .

In this embodiment, the input means or the selecting means may include a drying mode selecting means for selecting a heat source for heating the air supplied to the drum, and a drying course selecting means for selecting a drying method different depending on the object to be dried.

7, a power button 122 is provided on the left side of the control panel 120, and a dial knob 121 rotatable by a drying course selecting means for selecting a main drying course is disposed on the right side of the power button Respectively. On the right side of the knob, an operation / pause button 123 is provided. Since the power button and the operation / pause button are important factors for the operation of the dryer, they are provided as independent buttons from the knob to ensure user convenience and safety.

The knob 121 is a selection means for selecting a drying course to which a different drying method is applied depending on the object to be dried. Items corresponding to the drying courses provided in the dryer are expected at the outer periphery of the knob 121. The knobs 121 are provided at positions corresponding to the items corresponding to the respective courses of the knobs, Emitting means 121a in which an LED element is incorporated. When the user rotates the knob, the light emitting means emits light corresponding to the drying course so that the user can easily recognize the item selected by the user.

On the right side of the operation / pause button, a display device 124 is provided, and buttons for selecting various additional functions of the dryer are provided around the display device.

For example, a drying mode selection button 126 for selecting a drying mode, a steam button for selecting a steam function, and a drying level button for selecting a drying degree are provided below the display device 124 .

The drying mode selection button 126 is provided as selection means or input means capable of selecting a heat source for heating the air supplied to the drum as described above. Accordingly, the controller 200 can select and operate at least one of the heat pump system and the heater as a heat source for heating the air supplied to the drum according to the instruction inputted by the drying mode selection button .

On the left side of the drying mode selection button and the right side of the drying level button, an upper movement button and a lower movement button may be provided so that the user can easily move between various items displayed on the display device.

In addition, there is a time delay button on the left side of the display device, which can delay the drying operation time by arbitrarily adjusting the drying end time, and a wrinkle is generated in the drying object stored until the user removes the drying object from the drum after the drying process of the dryer A wrinkle preventing button is provided to allow the wrinkle preventing process to be performed.

In addition, on the right side of the display device, there are provided a buzzer button for adjusting a warning sound for reminding the user of the operation of the dryer, and a buzzer button for selecting a pre- A preferred drying button is provided.

In Fig. 7, the display device 124 uses a liquid crystal display (LCD). As a result, only items selected by the user or items that can be selected are displayed. However, instead of using an LCD, an LED may be used. In this case, various selection options at a predetermined position will be indicated by the light emission of the LED element.

Also, various warning signs may be displayed on the display device. Referring to FIG. 6, a filter cleaning notification display, a water supply required display, a lint filter installation required indication that the lint filter is not mounted, and a button lock indication to prevent random operation of the idle Respectively.

Also, the display device may display various information indicating the progress of the drying process. For example, the remaining drying time can also be displayed, and the degree of drying progress can be expressed as a percentage or displayed as a bar graph. In addition, the user may be notified of a manual or the like for informing the user of selection and correspondence.

On the other hand, the controller displays on the display device which is the display means, a drying mode which can be selected by the drying mode selecting means, in accordance with the instruction inputted by the drying course selecting means.

Here, the controller may display a drying mode selectable by the drying mode selecting means on a display device at an adjacent position corresponding to the drying mode selecting means. For example, the display device 124 may display the corresponding button at a position adjacent to the selection button corresponding to the function directly related to the drying process. That is, the controller 200 displays the corresponding button at a position corresponding to the button corresponding to the additional functions that can be selected in the drying process for each drying course selected by the knob.

More specifically, the controller 200 can display a selectable drying mode on the display device, which is the display means, with the selection button, which is the drying mode selection means, in accordance with the instruction inputted by the knob as the drying course selection means. In this case, the controller displays a selectable drying mode by the drying mode selection button at a position adjacent to the drying mode selection button.

Furthermore, the controller 200 may display a drying mode selectable by the drying mode selecting means at a position corresponding to the drying mode selecting means. For example, if the selection means is not a push button but a touch screen or a touch button, the controller displays a drying mode selectable by the drying mode selecting means at a position corresponding to the drying mode selecting means.

On the other hand, the controller (200) is configured so that the drying mode selectable by the drying mode selecting means is displayed on the display means only when the drying course which can be selected by the drying mode selecting means is selected by the drying course selecting means .

The dryer of the present invention is a hybrid dryer capable of selecting at least one of a heat pump system and a heater as a heat source. Accordingly, the user can select and execute the selected drying course from different drying modes. For example, a general drying mode in which only a heat pump system is used as a heat source may be performed according to a user's selection, and a high-speed drying mode in which a heat pump system and a heater are used as a heat source. However, it can not be performed in a fast drying mode on all drying courses. For example, when exposed to high temperatures such as wool, deformation is likely to occur only in the normal drying mode.

Therefore, in the present embodiment, when the user selects a drying course through the knob as the drying course selecting means, the controller determines whether the drying course is applicable to the fast drying mode. Thereby indicating whether or not the selection of the drying mode is possible at a corresponding position adjacent to the drying mode selection button of the display device. This can be accomplished by displaying the drying mode selected by the drying mode selection button on the display device, which is the display means, by the controller (200).

10, for example, when the user rotates the knob to select an item corresponding to a specific drying course, the controller determines whether the selected drying course is applicable to the fast drying mode. When the user presses the power button 122 of the dryer, the display device is activated as shown in FIG. 10 (a). If the user selects a drying course through which the fast drying mode can be applied through the knob 121, the controller can select a selection button at the corresponding position 127 adjacent to the drying mode selection button of the display device As shown in Fig. 10 (b). Such a display may blink in a corresponding area of the display device or may be displayed in a different color than the surroundings so that the user can recognize the display. The initial setting may indicate that the normal drying mode or fast drying mode is automatically selected. This will be described later.

That is, the controller displays the predetermined drying mode on the display means in accordance with the instruction inputted by the drying course selection means. That is, when the user selects an arbitrary drying course at an initial default, the display device automatically displays the selected drying course. Accordingly, when the user selects the drying mode through the drying mode selecting means, the event-set drying mode displayed on the display means is changed to the drying mode selected by the drying mode selecting means. The predetermined drying mode may be a general drying mode using the heat pump system as a heat source for heating the air supplied to the drum, or a high-speed drying mode using the heat pump system and the heater. This is to allow the drying to proceed automatically in any drying mode if the user does not make any selection.

On the other hand, the controller 200 displays the drying mode selected by the drying mode selecting means on the display means. For example, when the user presses the drying mode selection button 126 to select the high-speed drying mode, the controller may select the high-speed drying mode in the corresponding area 127 of the display device as shown in FIG. Display. It may also be displayed in a separate area 128 of the display device so that the user can easily recognize it. When the user repeatedly presses the drying mode selection button, the controller sequentially displays a general drying mode or a high-speed drying mode by changing and displaying the drying mode or the fast drying mode as shown in FIGS. 10 (d) and 10 . Further, the guidance message 129 for the current drying mode can be displayed as shown in FIG. 10 (f).

The controller 200 performs a drying course in accordance with the instruction inputted by the drying course selecting means. However, the heat source for heating the air supplied to the drum is operated in accordance with the instruction inputted by the drying mode selecting means. For example, when the user presses the operation button 123 as shown in FIG. 11, the controller drives the dryer in the drying mode displayed on the display device, and proceeds with the drying process.

Here, the controller may be configured such that, only when the drying course that can be selected by the drying mode selecting means is selected by the drying course selecting means, the air supplied to the drum according to the drying mode selected by the drying mode selecting means Activate the heat source to heat.

For example, the controller may be a heat source for heating the air supplied to the drum only when a drying course capable of using a heat pump system and a heater as the heat source for heating the air supplied to the drum is selected by the drying course selecting means The heat pump system and the heater can be operated. Also in this case, only when the drying mode using the heat pump system and the heater is selected as the heat source for heating the air supplied to the drum by the drying mode selecting means, the heat pump is used as the heat source for heating the air supplied to the drum. The system and the heater are operated.

For example, if the user selects a drying course as a knob for drying wool fabrics to which a fast drying mode can not be applied, the controller can not select a selection button at a corresponding location adjacent to the drying mode selection button of the display device Display. This display is indicated by a dotted line to indicate that it is not a selectable item in the corresponding area of the display device, so that the user can recognize that it is not possible to select. In addition, it is possible to recognize that the user can not make a choice through not displaying the distinguishing method such as blinking. Also, even if the user presses the drying mode selection button, the selection is not made.

As another example, as shown in Fig. 15, the user may select a drying course that can not be applied to both the normal drying mode and the fast drying mode. For example, when the kneading is selected as the drying course using the cooled air, the controller can not select the selection button at the corresponding position 127 adjacent to the drying mode selection button of the display device. (b). This is also displayed or activated so that the user can recognize it in the manner described above. Further, when the user presses the select button, the controller may display the guidance message 129a on the display device, or may cause the alarm to sound.

Here, the controller may be configured such that, only when the drying course that can be selected by the drying mode selecting means is selected by the drying course selecting means, depending on the drying mode selected by the drying mode selecting means or the predetermined drying mode And activates a heat source for heating the air supplied to the drum. This allows the user to automatically perform the above-described predetermined drying mode if the user does not select the drying mode separately.

On the other hand, in the embodiment of Fig. 7, the control panel is provided with a dial knob 121 rotatable by the drying course selection means. Here, the drying knob 121 is distinguished from the drying mode selecting means by a drying course in which a drying mode can be selected, and is displayed around the dial knob or the dial knob.

For example, referring to FIG. 7, each drying course displayed on the outer periphery of the knob is classified and arranged according to applicable additional functions. Only the drying course to which the steam injection function can be applied is disposed on the left side 125a of the knob and only the drying course to which the steam injection function can not be applied is disposed on the right side 125b of the knob. Further, a separate character, i.e., a drying course to be sprayed with steam, is printed on the upper left side of the knob in a different color from the drying course items. The color of the character may be red so that the user can easily recognize the color. In addition, only the items to which the steam injection function can be applied, a curved pattern printed in red along the outer periphery of the knob may be displayed.

Here, in the example of FIG. 7, since the above-described high-speed drying mode can be applied, a drying course capable of selecting a drying mode is disposed on the left side 125a of the knob. That is, the drying course to be applied to the cotton material, the mixed fabric, the jeans, and the like is disposed on the left side of the knob. Accordingly, the user can easily recognize the drying course to which the high-speed drying mode is applied.

Furthermore, as described above, since only the course to which the steam injection function is applied is disposed on the left side of the knob, there is a fear of confusion. Accordingly, the drying course, which can be applied to both the steam jetting function and the high-speed drying mode, and the drying course capable of only the steam jetting function, are distinguished from each other, so that the user can easily recognize the drying course. For example, a drying course applicable to both the steam injection function and the high-speed drying mode may be adjacent to the upper left side of the knob, and a drying course capable of only steam injection function may be adjacent to the lower left side of the knob have. In addition, the drying course, which is applicable to both the steam injection function and the high-speed drying mode, is printed in black, and the drying course, which is possible only for the steam injection function, is printed in red. This makes it easier for the user to recognize by applying the same red as a separate character, i.e., a drying course for steam injection on the upper left side of the knob described above. Further, it is also possible to make the light emission color of the light emitting means for indicating the selected state at the point corresponding to the item corresponding to each course among the outer circumferential portions of the knobs to be easily distinguished. Here, the drying course which can only have the steam injection function may have a steam sterilization course and a steam refresh course.

On the other hand, on the right side of the knob, there is disposed a drying course to which a time-drying mode for drying can be applied for a predetermined period of time regardless of the material of the object to be dried. Here, since only the drying course to which the steam injection function can not be applied can be applied to the right side of the knob, the drying course and the time drying mode, to which the steam injection function can not be applied and the time drying mode can not be applied, Respectively.

Referring to FIG. 7, on the right side upper side of the knob, drying courses which can not apply the steam jetting function and can not apply the time drying mode are arranged so as to be adjacent to each other. In the right lower side of the knob, Are arranged adjacent to each other. Further, between the drying courses to which the steam injection function can not be applied on the right side of the knob and the time drying mode can not be applied and the time drying mode, there is a separate character called the time drying mode, . The color of the character may be blue so that the user can easily recognize the color. Also, in the time-drying mode, a curved pattern printed in blue along the outer periphery of the knob may be displayed only on the items of the drying course to which the kneading can be applied.

Meanwhile, the buttons provided in the periphery of the display device are separated from functions directly related to the determination of the drying process and function selection buttons not directly related to the determination of the drying process. That is, the buttons provided below the display device are disposed adjacent to buttons related to functions directly related to the determination of the drying process.

In another embodiment, the control panel includes drying course selection means for selecting a different drying method according to the object to be dried, but the drying mode selection means and the drying course selection means correspond to one selection means, The operation of the means can be differentiated.

Here, the one selecting means is a rotatable dial knob, and selectable drying courses and drying modes for each drying course are displayed around the dial knob. .

Fig. 8 shows an example in which one selecting means can be the drying mode selecting means and the drying course selecting means. 8, a power button 122 is provided on the left side of the control panel 120, a drying course selecting unit for selecting a main drying course on the right side of the power button, and a drying mode selecting unit A dial knob 121 rotatable by a dial is disposed. On the right side of the knob, an operation / pause button 123 is provided.

In the example of FIG. 8, a drying course applicable only to the general drying mode is disposed on the left side 125c of the knob. In addition, the drying course to which the high-speed drying mode can be applied is separately arranged on the right side 125d of the knob. Accordingly, the user can easily recognize the drying course to which the high-speed drying mode is applied.

In Fig. 8, even the same drying course is classified according to the drying mode. That is, even in the same drying course, a normal drying mode is disposed on the left side 125c of the knob, and a high-speed drying mode is disposed on the right side 125d of the knob. Accordingly, the user can simply select the drying course to be performed in the general drying mode by rotating the knob or the drying course to be performed in the high-speed drying mode. In this case, when the user immediately presses the operation button 123, the drying is performed using the drying mode and the drying course selected by the knob.

In addition, on the right lower side 125e of the knob, drying courses to which a time-drying mode can be applied are arranged adjacent to each other. The drying course to which the time-drying mode is applied is differently displayed around the knob to be distinguished from the drying course to which the high-speed drying mode is applied.

On the other hand, the one selecting means may be constituted by a push button or a touch button. In this case, the drying courses and the drying modes of each drying course may be changed according to the selected number of the push buttons or the touch buttons.

On the other hand, the controller displays the selected drying course and drying mode in the corresponding area of the display device, which is the display means, in accordance with the instruction inputted by the operation to the one selecting means. Since this example has been described in the description of the display on the display device, a more detailed description will be omitted.

Meanwhile, when the controller performs the drying process in the drying course and the drying mode selected by the user, the controller can display the progress of the current drying process on the display device. Furthermore, the drying has been completed and may be marked. For example, in FIG. 11, the display device can display the current drying processes 131a and 132a as shown in FIG. 11 as drying conditions 131b and 132b, and also show changes in remaining drying time 131c and 132c And may show that the drying has ended.

Meanwhile, when the controller needs to supply the water of the dryer before the operation of the dryer, or when the lint filter is not installed, the controller displays this in the corresponding area of the display device. Even if the user selects the drying mode, So that the drying process can be prevented from proceeding. Further, it is possible to display a guidance message on the display device and make a warning sound.

Further, the controller may display a warning message and sound a warning sound when a problem occurs in the dryer apparatus during the operation of the dryer. In addition, the operation of the dryer can be automatically changed.

The controller performs the drying course according to the instruction inputted by the drying course selection button, but operates the heat source for heating the air supplied to the drum according to the instruction inputted by the drying mode selection button. 9, a heat pump system may be used as a heat source, or a heater may be used in combination.

Furthermore, the controller can automatically change the heat source for heating the air supplied to the drum according to the temperature of the air passing through the drum or the refrigerant temperature of the heat pump system, regardless of the instruction inputted by the drying mode selection button, It is possible to stop the operation of the motor. This specific control will be described later.

On the other hand, the dryer of the above-described embodiment can be connected to a smart grid (electric power grid) to reduce electric charges. The Smart Grid is the next generation power system and its management system, enabling the interaction between the consumer and the supplier of electricity. Accordingly, the user can judge the electricity rate in real time and recognize the peak time of the electricity rate, and can use it to distribute the electric power demand and save the electricity bill.

The hybrid drier of the present embodiment has a merit that energy consumption is basically reduced by using a heat pump system, but it enables an efficient dryer control for an absolute energy consumption to save electric bill. In particular, the drying using the heat pump system may have a greater significance in the hybrid dryer of the present invention, since the drying time may be relatively longer than that of a dryer using only a heater.

To this end, the hybrid drier of the present embodiment may incorporate an energy management device (EMS) or may be connected to an independent external energy management device. The energy management device refers to a device that controls the heat source start time of the dryer or changes the heat source based on power information supplied from the outside. However, if the energy management device is built in the dryer, the controller of the dryer may be applicable. Fig. 13 shows the control by this energy management apparatus.

The energy management apparatus 300 includes a control unit 310 that can control the driving motor 20 of the dryer, the heat pump system 70, the heater 40, and the like in place of the controller. In addition, the display unit 330 may include a display unit 330 that can provide various information such as an electricity rate and the like supplied from the outside to the user, and an input unit 320 that allows the user to input a basic command of operation based on the information of the display unit . Here, the display unit and the input unit may be replaced with a control panel 120 and a display device 124 including an input unit of the dryer.

Wherein the dryer can optionally be controlled by the energy management device. That is, the driving of the dryer controlled by the energy management apparatus can be selected, and the driving of the general dryer can also be selected. The input means may be provided on the control panel of the main body in the form of a button or a touch screen.

According to another aspect of the present invention, there is provided a method of controlling a dryer, comprising: (S10) determining whether a charge-saving mode capable of controlling an operation of a dryer is selected based on power information supplied from an external source; A step (S20) of determining whether any one of a forced application mode in which the operation time of the dryer is forcibly changed to a time period in which the electricity rate is low by the controller or a conditional application mode in which the use time of the dryer is changed or the use heat source is changed, And changing the operation time of the dryer by the controller or changing the heat source to be used when the forced application mode or the conditional application mode is selected (S30). Figures 15 and 16 show a flow chart of embodiments of such a dryer control method.

The step S10 of determining whether a charge-saving mode capable of controlling the operation of the dryer is selected based on power information supplied from the outside is a step of confirming the selection of the user by the controller. That is, when the user does not select the control by the energy management apparatus by selection, the dryer operates normally regardless of the electric charge or the like. However, when the user selects the dryer control by the energy management apparatus based on the information received by the energy management apparatus, the electricity saving mode is performed.

A forced application mode in which the operation time of the dryer is forcibly changed to a time period in which the electric charge is inexpensive by the controller or a condition application mode in which the use time of the dryer is changed or the use heat source is changed conditionally, Step S20 is then performed to determine if one has been selected. That is, the user again selects the type of control by the energy management apparatus by selection. Thereafter, the controller changes the operating time of the dryer or changes the heat source used to drive the dryer (S30), so that drying is performed so as to save money.

For example, the user can select a forced application mode in which the control by the energy management apparatus is forcibly applied, and can select a conditional application mode to be applied conditionally. The forced application mode is to control the operation of the hybrid drier only when the electricity bill is low, such as the night time zone. This includes not only delaying the start of operation by adjusting the start time to the beginning of the night time zone, but also forcing the operation to stop when the electric utterance is overcharged during the operation of the dryer and wait until the night time zone starts May also be included.

Fig. 14 shows an example of variation of the electricity rate with time. In Fig. 14, the peak hour lease (A), in which the electricity rate is relatively high, and the night time period (B), in which the electricity rate is relatively low, are distinguished.

In the conditional application mode, if the estimated operation time of the dryer is included in all of the night time zones, the dryer is immediately operated normally and the dryer operates normally even if the estimated operation time of the dryer is included in all of the rental. However, as shown in FIG. 14, when the expected operating time of the dryer is located in the boundary time zones C and D between the peak hour rent A and the inexpensive night time zone B, To be inexpensive.

Fig. 15 shows an example in which the user selects control (S10) by the energy management apparatus and a conditional application mode (S20), and selects the start of operation of the dryer at the peak time zone. The dryer senses the amount of the object to be dried in the drum and calculates the estimated drying time t1 in consideration of the drying course and the option selected by the user. Thereafter, it is determined whether or not the estimated end time is after a predetermined set time tn earlier than the start time of the night time zone where the electricity bill is low. For example, if the night time zone starts at 2 am in the morning, the preset time tn is 1:30 before 30 minutes.

If the expected end time t1 is not after the set time described above, the dryer does not normally start drying immediately because it does not satisfy the condition as described above.

If the expected end time t1 is after the set time, the dryer remains in a standby state until the start time of the night time zone is reached with the operation stopped. Thereafter, the dryer starts drying when it reaches the night time zone.

Or if the user selects the fast drying mode, if the expected end time t1 is after the set time described above, the dryer automatically switches to the normal drying mode until reaching the midnight time zone, It may be automatically switched to the high-speed drying mode and the drying may proceed. This is because only a heat pump system with a small electric power consumption is used as a heat source in the case of a peak-leased electric vehicle, which is expensive in an electric charge, and a quick drying time can be achieved by using both a heat pump system and a heater in a low- .

On the other hand, Fig. 16 shows an example of a case where the user selects control (S10) and conditional application mode (S20) by the energy management apparatus and selects the start of operation of the dryer at the night time zone. The dryer senses the amount of the object to be dried in the drum and calculates the estimated drying time t1 in consideration of the drying course and the option selected by the user. And then determines whether the expected end time is after the start time of the peak time band where the electricity bill is expensive.

If the expected end time t1 is before the start time of the peak time band, the dryer is normally operated.

If the expected end time t1 is after the start time of the peak time period, it is determined whether the expected start time of the cooling process of the dryer is after the peak time. Here, if the expected start time of the cooling process of the dryer is before the peak time, the dryer operates normally immediately. This is because, in the cooling process in which the drying object is completed and the drying object is cooled, a heat source such as a heat pump system and a heater consumes a large amount of electric power and the operation time of the remaining dryer is small, Even if it is included in the lease, it does not greatly affect the saving of electric charges.

Here, several possibilities can be considered when the expected start time of the cooling process of the dryer is after the peak time. If the user operates the dryer in the normal drying mode described above, the completion of drying before the peak time is reached is a way to reduce the electricity bill. Therefore, if the user has a material to be applied to the high-speed drying mode in which the drying object is supplementarily used to quickly dry the heater or the like even after the user operates the dryer in the normal drying mode, the dryer is controlled to be switched to the high-speed drying mode and operated. In addition, the user may be allowed to select the display through the display means included in the control panel. If the user chooses not to switch to the fast drying mode, the dryer will immediately proceed to the normal drying mode. However, if the user operates the dryer in the high-speed drying mode from the beginning, the drying will proceed immediately to the high-speed drying mode.

The devices provided in the main body of the dryer are controlled by the controller (200). The controller controls the devices based on measured values received from the temperature sensors and the humidity sensor.

In one embodiment of the control of the dryer by the controller, there is a heater operation control for determining whether the compressor is normally operated at the time of initial driving of the compressor and determining whether to operate the heater. This is a safety measure for protecting the reliability of the compressor in the high-speed drying mode.

The heater operation control is applied when the heat pump system and the heater are selected as a heat source for heating the air supplied to the drum, and the operation of the heat pump system (S110) (S120), and whether or not the heater is used as the heat source is determined according to the normal operation of the compressor.

Fig. 17 shows an example of such heater activation control. Referring to FIG. 17, step (S100) of operating the heat pump system refers to a step in which the heat pump system in the heat source starts to be started by the start of drying. That is, when the controller receives the start-of-drying command, it stores the initial compressor outlet-side temperature. Thereafter, the drive motor is rotated in the reverse direction, and the load operation is controlled to start the compressor. The load operation control will be described later.

The step S120 of determining whether the compressor included in the heat pump system operates normally is a step of determining whether the compressor operates normally through a change in the temperature of the refrigerant passing through the compressor. Accordingly, the step S121 of measuring the temperature change amount of the refrigerant passing through the compressor is included.

That is, after the compressor is operated for a predetermined period of time, the controller again measures the compressor outlet side temperature. If the measured temperature change amount of the refrigerant on the outflow side of the compressor is larger than the preset minimum difference value (or the reference temperature change amount), the normal controller determines that the compressor is driven, and the controller activates the heater (S122).

However, when the measured temperature change amount of the refrigerant on the outflow side of the compressor is smaller than the predetermined minimum difference value, there is a possibility that the compressor is not normally operated. However, if the measured temperature of the outflow side of the compressor is larger than the lower limit of the reference operation temperature, it corresponds to normal compressor operation. Therefore, the controller can operate the heater. However, if the re-measured temperature on the outflow side of the compressor is smaller than the lower limit of the reference operating temperature, it corresponds to abnormal compressor operation.

Even if the measured temperature change amount of the refrigerant on the outflow side of the compressor is smaller than the preset minimum difference value, the controller re-measures the temperature of the outflow side refrigerant after activating the heater once. Here, when the temperature change amount of the refrigerant on the compressor outlet side after the heater is operated is larger than the preset minimum difference value, the high speed drying mode is performed corresponding to the normal operation. However, since the heater has already been operated, the operation of the heater is not necessary.

However, when the temperature change amount of the refrigerant on the outflow side of the compressor after the heater is operated is smaller than the preset minimum difference value, the controller turns off the heater and forcibly switches to the normal drying mode to proceed the drying.

On the other hand, the filter provided in the dryer may be clogged. In such a case, particularly when the heat pump system is subjected to high heat load by the heat energy supplied from the heater in the high speed drying mode, the circulation of the air may not be smooth due to clogging of the filter. In this case, the compressor may be overloaded, the temperature inside the drum may rise, and damage to the drying object may occur. Therefore, an embodiment of the filter clog control for determining whether clogging of the filter is detected to start the initial heater will be described below.

The filter clogging control method may further include a step (S130) of determining clogging of the filter through which the air flowing out of the drum passes according to the temperature of the air flowing into the drum (S130) The operation of the pump system can be stopped. Fig. 18 shows an embodiment of the filter clog control.

Referring to FIG. 18, the controller starts to operate the heat pump system (S110). That is, the controller senses the initial operation of the compressor.

Then, the step of judging clogging of the filter (S130) is performed. The step of determining clogging of the filter (S130) determines that the filter is clogged when the temperature of the air flowing into the drum after the heater is temporarily operated and stopped is equal to or higher than the filter clogging reference temperature. If the temperature of the air is lower than the filter clogging reference temperature, it is determined that the filter is not clogged, and the heater is normally operated to perform drying in the high-speed drying mode.

That is, the controller performs the process of stopping the heater after temporarily operating the heater once or plural times, and then measures the temperature of the drum inlet side air. When the temperature of the drum inflow air is equal to or higher than the filter clogging reference temperature, the controller judges that the filter is clogged and stops the operation of the dryer. Further, the controller displays a guidance message on the control panel and generates a warning sound so that the user can recognize the warning message.

In addition, when the temperature of the drum inflow side air reaches the upper limit value of the predetermined temperature range by the temporary operation of the heater, the heater is stopped and the temperature of the air supplied to the drum is lowered. The controller can perform the temperature control of the drum to be described later, which restarts the heater, in parallel.

In addition, the controller can determine whether the temperature difference between the inlet-side air temperature Tin1 of the initially measured drum and the re-measured temperature Tin2 of the drum-inlet-side air is equal to or greater than a predetermined reference value.

If the difference is equal to or higher than the reference value and the degree of drying measured by the humidity sensor is more than the reference value, the drying process can be performed in the normal drying mode without operating the heater. However, if the drying degree measured by the humidity sensor does not reach the reference value, it is determined that the operation is normal, and the drying process is performed in the high-speed drying mode.

On the other hand, if the difference is less than the reference value, the controller measures the temperature difference again after a predetermined time elapses. If the temperature difference again exceeds the reference value and the degree of drying measured by the humidity sensor is more than the reference value, the controller performs the drying process in the normal drying mode without operating the heater. However, if the drying degree measured by the humidity sensor does not reach the reference value, it is determined that the operation is normal, and the drying process is performed in the high-speed drying mode. However, if the measured temperature difference is less than the reference value, the controller performs the drying process in the normal drying mode without operating the heater.

On the other hand, the above-mentioned filter may be clogged during the drying process. In such a case, particularly when the heat pump system is subjected to a high heat load by the heat energy supplied from the heater in the high speed drying mode, if the circulation of the air is not made smooth due to clogging of the lint filter, overload may occur in the compressor, The internal temperature may rise, and damage to the object to be dried may occur. Therefore, it is necessary to control the clogging of the filter during the drying to stop the operation of the heater by detecting clogging of the filter.

Figures 19 and 20 show filter clogging control during drying. The filter clogging control during drying may further include a step (S140) of re-determining the clogging of the filter in accordance with the temperature difference between the air flowing into the drum and the air flowing out of the drum after a predetermined time after the heater is operated .

If the temperature difference between the air flowing into the drum and the air flowing out of the drum is equal to or higher than a predetermined filter clogging reference temperature difference, the step S140 of determining whether the filter is clogged is determined to be a clogging of the filter and the operation of the heater and the compressor is stopped.

The controller senses a temperature difference [Delta] T between the drum inlet side air and the drum outlet side air. If the temperature difference is equal to or greater than the reference value (DELTA Tref), the controller stops the operation of the heater.

The controller stops the operation of the compressor and then stops the operation of the compressor. Further, the controller displays a guidance message on the control panel and generates a warning sound so that the user can recognize the warning message.

Here, the drying process can be considered when the drying process is sufficiently advanced or not.

If the predetermined time has elapsed since the start of drying, the controller restarts the compressor and uses only the heat pump system as the heat source. The controller does not stop the operation of the dryer, but restarts the compressor after a predetermined time elapses. That is, the dryer is forcibly switched from the high-speed drying mode to the general drying mode, so that only the heat pump system is used as the heat source.

Embodiments such as the heater operation control and the filter clog control described above are control for stable operation of the devices coexisting with operation of the heat pump system. That is, the above-described controls can be efficiently performed only when the heat pump system is stably operated. The heat pump system operates the compressor to stably circulate the refrigerant flowing through the refrigerant pipe. Therefore, the stable driving of the compressor becomes an important factor in the reliability of the heat pump system.

In the case of a hybrid drier equipped with a heat pump system, when an overload occurs in the compressor, the reliability of the compressor is deteriorated, and the temperature inside the drum rises, possibly causing damage to the object to be dried. Accordingly, the controller controls the compressor temperature to control the temperature of the refrigerant passing through the compressor in order to prevent overload of the compressor.

The embodiment of the compressor temperature control is characterized in that the operation of the heater or the cooling fan is repeated according to the temperature of the refrigerant passed through the compressor. This is because the heat pump system and the heater are used as the heat source and the heat pump system is used as the heat source.

Fig. 21 shows an embodiment of the compressor temperature control when only the heat pump system is used as the heat source, and Fig. 22 shows an embodiment of the compressor temperature control when the heat pump system and the heater are used as the heat source.

(S151) of determining whether the temperature of the refrigerant passing through the compressor is included in a predetermined temperature range by measuring the temperature of the refrigerant passing through the compressor during the operation of the heater, Stopping the operation of the heater or driving the cooling fan (S152) when the temperature of the refrigerant passing through the compressor reaches the upper limit of the predetermined temperature range, (S153). When the temperature of the refrigerant that has passed through the compressor measured during operation of the heater or during operation of the cooling fan reaches the lower limit of the temperature range, And stopping the driving of the cooling fan (S154).

The compressor temperature control step (S150) is performed after the operation of the dryer is started and the heat source is driven. That is, after the heat pump system is operated (S110) in the general drying mode, the heat pump system (S110) and the heater (S120) are operated in the high speed drying mode.

The step (S151) of determining whether the temperature of the refrigerant passing through the compressor is in a predetermined temperature range during the operation of the heater includes a step of determining whether the temperature T1 of the refrigerant flowing out of the compressor through the compressor outlet temperature sensor . Then, the controller determines whether the temperature of the refrigerant is included in a predetermined temperature range (Tmin to Tmax).

The predetermined temperature range may vary depending on the drying course and the drying mode depending on the type of the object to be dried selected by the user. This is because the temperature of the inside of the drum to be maintained differs depending on the material of the object to be dried, so that the heat energy to be supplied must be changed, and the heat load of the compressor must also be changed.

When the temperature of the refrigerant measured during operation of the heater reaches the upper limit of the predetermined temperature range, the controller stops the operation of the heater or drives the cooling fan (S152) based on the determined temperature of the refrigerant. That is, when the temperature (T1) of the refrigerant on the outflow side of the compressor reaches the upper limit value of the temperature range, the controller operates the cooling fan or stops the operation of the heater to lower the temperature of the compressor.

If the drying is performed in the general drying mode, as shown in FIG. 21, the controller drives the cooling fan (S152), discharges the heat accumulated in the coolant through the supply of the outside air, and cools the compressor. Further, when the drying progresses in the high-speed drying mode, the operation of the heater is stopped (S152) as shown in FIG. 22 to reduce the heat load applied to the heat pump system.

Thereafter, the controller measures the temperature of the refrigerant passing through the compressor during the operation of the heater or during operation of the cooling fan (S153), and determines whether the temperature is included in the predetermined temperature variable range. That is, the controller continuously detects the temperature (T2) of the refrigerant on the outflow side of the compressor to determine whether the temperature of the refrigerant reaches the lower limit of the temperature range.

The controller restarts the heater or stops driving the cooling fan (S154) when the temperature of the refrigerant measured during the operation of the heater or during operation of the cooling fan reaches the lower limit of the temperature range. That is, when the temperature of the refrigerant reaches the lower limit of the temperature range, the controller stops the operation of the cooling fan again or restarts the heater because the temperature of the compressor becomes stable. 21, the controller stops the operation of the cooling fan (S154). If the drying is progressed in the high-speed drying mode, the heater is restarted (S154) as shown in FIG. 22, So as to supply heat.

If the temperature of the refrigerant measured during the operation of the heater or during the operation of the cooling fan has reached the lower limit of the predetermined temperature range and the heater is restarted or the operation of the cooling fan is stopped (S154 (S151) whether the temperature of the refrigerant passing through the compressor during the operation of the heater or during the stoppage of the cooling fan is measured again and included in the temperature range.

On the other hand, if the temperature of the refrigerant does not reach the lower limit of the temperature range within a predetermined time even if the operation of the heater is stopped or the cooling fan is operated, the compressor is still regarded as an overload condition. In addition, the temperature T2 of the refrigerant on the outflow side of the compressor is continuously increased, so that an overload condition may occur in the compressor. In this case, the temperature of the compressor is controlled through a separate compressor reliability protection control, which will be described later.

Since the hybrid drier must continuously operate the heat pump system, operational reliability of the compressor is important. Therefore, in order to maintain the reliability of the compressor, when an overload occurs in the compressor, a serious problem may occur in the apparatus and the drying process of the dryer, and therefore, the compressor reliability protection control for preventing the compressor reliability control is required.

The compressor reliability protection control is performed differently in the normal drying mode and the high-speed drying mode. Because each drying mode has different heat source and thermal load, the control by the controller also changes.

In the case of the general drying mode, as described above, the temperature control of the compressor (S150) is performed by driving the cooling fan, and the controller determines whether the cooling fan is driven by measuring the temperature of the refrigerant on the outlet side of the compressor.

Fig. 23 shows the compressor reliability protection control in this general drying mode. 23, in the general drying mode, the compressor reliability protection control step (S160) includes a step (S161) of restarting the operation after temporarily stopping the operation of the compressor, measuring the temperature of the refrigerant passing through the compressor, Determining whether the temperature of the refrigerant reaches the reference temperature Tmax or not (S162), stopping the operation of the compressor or stopping the operation of the dryer according to whether the measured temperature of the refrigerant reaches a predetermined overload reference temperature Tmax S163).

In the step S161 of restarting the operation of the compressor temporarily after the operation of the compressor is stopped, the controller stops operation of the compressor and restarts the compressor after a predetermined time.

Then, the controller senses the temperature Tout2 of the refrigerant on the outflow side of the compressor and determines whether the refrigerant temperature Tout is below the overload reference temperature Tmax (S162). Here, when the temperature of the refrigerant on the outflow side of the compressor reaches the overload reference temperature again, the operation of the compressor is stopped again and the operation is restarted after a predetermined time (S163).

At this time, the controller stores the number of times of stopping the operation of the compressor (n). Accordingly, when the number of compressor shutdown times reaches the preset number, the drying process is forcibly terminated. Further, the controller may generate a warning sound along with a guidance message on the control panel so that the user can recognize the warning sound.

On the other hand, although the temperature of the refrigerant on the outflow side of the compressor does not reach the operating temperature of the cooling fan, the temperature of the refrigerant on the inflow side of the evaporator may be increased to overload the compressor. This is problematic because the temperature of the refrigerant on the inflow side of the evaporator is increased and heat exchange is not sufficiently performed in the evaporator.

In this case, the controller senses the temperature Tin1 of the refrigerant at the evaporator inlet side. When the temperature of the refrigerant reaches the upper limit reference temperature Tref2 on the evaporator inlet side, the controller primarily reduces the opening of the expansion valve.

The controller then measures the temperature (Tin2) of the refrigerant at the inlet side of the evaporator and, if the refrigerant temperature is still above the reference temperature (Tref2), reduces the opening of the expansion valve. At this time, the opening degree of the expansion valve is gradually reduced.

The controller repeats the above process until the temperature Tin2 of the refrigerant at the evaporator inlet side becomes equal to or lower than the reference temperature Tref2. However, when the opening degree reduction of the expansion valve becomes the minimum opening state of the expansion valve, the state is maintained. This is because the minimum heat pump system must be operated in order for the drying process to proceed, so that the heat pump system is operated by opening the expansion valve at least to limit the flow rate of the refrigerant to a minimum.

In the case of the high-speed drying mode, as described above, the temperature control of the compressor is performed by driving control of the heater, and the controller determines whether the heater is driven by measuring the temperature of the refrigerant at the outlet side of the compressor.

When the temperature of the refrigerant on the outlet side of the compressor reaches the lower limit value of the temperature range, the heater is turned on. However, when the temperature of the refrigerant does not reach the lower limit of the temperature range for a predetermined time or longer, the heat pump system should be considered to be in an overload condition. Further, even when the temperature of the refrigerant on the outflow side of the compressor continuously increases to reach a predetermined limit temperature, the heat pump system must be considered to be in an overload condition.

24 shows the compressor reliability protection control in the fast drying mode. 24, in the high-speed drying mode, the compressor reliability protection control step S170 includes a primary valve control step S171 for controlling the opening degree of the expansion valve included in the heat pump system, And a second-stage valve control step (S173) for additionally controlling the degree of opening of the expansion valve included in the expansion valve.

The first valve control step (S171) includes a first reduction step of gradually reducing the opening degree of the expansion valve, a second reduction step of reducing the temperature of the refrigerant passing through the compressor during the first reduction step, (S172) of determining whether the temperature of the refrigerant is included, and a first increasing step of gradually increasing the opening degree of the expansion valve when the measured temperature of the refrigerant reaches a lower limit of a predetermined temperature range.

More specifically, the controller gradually reduces the opening of the expansion valve. The controller continuously senses the temperature of the refrigerant on the compressor outlet side while reducing the opening degree of the expansion valve (S172). At this time, when the temperature of the refrigerant on the outflow side of the compressor reaches the lower limit value of the temperature range, the opening degree of the expansion valve is gradually increased again. When the measured temperature of the refrigerant reaches the lower limit of the predetermined temperature range, the heater is operated. This is because it is out of the overload condition so that the drying process can proceed again to the high speed drying mode. The reduction of the position of the expansion valve is continued until the opening degree of the expansion valve reaches the minimum opening state.

The first valve control step (S171) gradually increases the opening degree of the expansion valve through the first increasing step, repeats the measurement of the temperature of the refrigerant passing through the compressor and is included in the temperature range . Further, the degree of opening of the expansion valve by the first reducing step and the first increasing step is limited to a predetermined first opening degree range.

Here, when the temperature of the refrigerant on the outflow side of the compressor does not reach the lower limit of the temperature range and the opening degree of the expansion valve is reduced to reach the minimum opening state, the controller controls the opening degree of the expansion valve . This case also includes the case where the temperature of the refrigerant on the outlet side of the compressor is not less than the predetermined limit temperature for a predetermined time or more.

That is, the secondary valve control is performed under an overload condition in which the temperature of the refrigerant passing through the compressor during the first reduction step exceeds the upper limit of the temperature range or is not reached within a predetermined time at the lower limit of the temperature range.

The second valve control step S173 includes a second decreasing step of gradually reducing the opening degree of the expansion valve, a step S174 of determining whether the temperature of the refrigerant passed through the compressor is included in the temperature range, And a second increasing step of gradually increasing the opening degree of the expansion valve when the measured temperature of the refrigerant reaches a lower limit of the temperature range.

More specifically, the controller gradually reduces the opening degree of the expansion valve again. The controller continuously senses the temperature of the refrigerant on the compressor outlet side while reducing the opening of the expansion valve. At this time, when the temperature of the refrigerant on the outflow side of the compressor reaches the lower limit value of the temperature range, the opening degree of the expansion valve is gradually increased again. Here, the heater is operated when the measured temperature of the refrigerant reaches the lower limit of the temperature range.

The opening degree reduction of the expansion valve proceeds to a level close to the full closing of the expansion valve. Further, the opening degree of the expansion valve is made only until the opening degree of the expansion valve reaches the minimum opening state. This is because it is clear that the overload condition is not solved in the above-mentioned primary control.

During the secondary valve control, the temperature of the refrigerant at the inlet side of the evaporator may drop below the limit. In this case, the controller suspends and resumes the operation of the compressor. If the heater is turned on, the controller suspends operation of the compressor and then resumes operation of the compressor. However, after restarting, the controller performs the secondary valve control.

The second valve control step S173 may further include gradually increasing the opening degree of the expansion valve through the second increase step, measuring the temperature of the refrigerant passing through the compressor again, Repeat judgment. The degree of opening of the expansion valve by the second reduction step and the second increase step is limited to a predetermined secondary opening range.

If the temperature of the refrigerant passing through the compressor exceeds the upper limit of the temperature range or does not reach the lower limit of the temperature range within a predetermined time, the third control (S175) The compressor is restarted after temporarily stopping the compressor, and only the heat pump system is used as the heat source.

That is, the third control (S175) is a control step performed when the temperature of the refrigerant on the outflow side of the compressor does not reach the lower limit value of the temperature range, and the opening degree of the expansion valve is reduced to reach a level close to full closing . This case also includes the case where the temperature of the refrigerant on the outlet side of the compressor is not less than the predetermined limit temperature for a predetermined time or more.

In the third control (S175), the controller stops the operation of the compressor and restarts the compressor after a predetermined time. Here, the controller controls the opening of the valve to a fully closed state at the same time when the compressor is stopped. The controller then gradually opens the valve to a minimum. Increasing the opening degree of the valve gradually increases the opening degree of the valve stepwise. For example, the valve is opened step by step to 55 pulses, which is the minimum opening degree, but is opened with 35 pulses for 2 seconds and then 55 pulses. The controller fully closes the opening of the valve after a predetermined time when the opening degree of the valve reaches the minimum opening degree. For example, after opening for 3 minutes with 55 pulses, the opening of the valve is fully closed.

When the compressor is restarted after a predetermined time has elapsed, the controller keeps the opening of the valve fully closed for a predetermined time after starting the driving of the compressor. Then gradually increase the opening of the valve. The increase in the opening of the valve is made until the opening degree of the valve applied to the predetermined general drying mode is reached. That is, the dryer is forcibly switched from the high-speed drying mode to the general drying mode by the tertiary control, so that only the heat pump system is used as the heat source.

On the other hand, if the overload condition is not solved after the drying in the normal drying mode by the third control, the compressor reliability protection control step (S160) in the general drying mode is performed.

In the hybrid dryer, the driving motor of the drum and the blower fan are connected to the same drive shaft. Therefore, if the drum is not driven, the blowing fan is not operated. Accordingly, even if the heat pump system and the heater are operated to heat the air, if the blowing fan is not operated, there is a problem in driving the heat pump system.

Therefore, it is preferable that the above-described embodiments such as the heater operation control, the filter clogging control and the compressor temperature control are performed after the drive motor is started. Accordingly, it is necessary to control the operation of the load of the drier such as the driving motor and the heat source.

25 and 26 show such load operation control. 25 and 26, a step S90 of operating the load driving control drive motor to operate the drum, a step S110 of activating the heat pump system by operating the compressor, And operating the heater with the heat source (S120).

In step S90 of operating the drum, the drive motor is rotated forward for a predetermined period of time after the reverse rotation, and step S110 of operating the heat pump system is started after the drive motor is rotated forward.

More specifically, when starting the drying process, the controller drives the drive motor or drum preferentially. Then, the compressor is driven to operate the heat pump system.

When the drum is driven, the controller reversely rotates the drive motor for a short time and then rotates the motor forward. This is to match the tension of the belt in the characteristics of the hybrid drier of the present invention having a belt-type power transmission system. In addition, due to the characteristics of the drive motor, it is intended to prevent an overcurrent from flowing during the initial drive. Here, the forward rotation and the reverse rotation of the drum are limited to the normal rotation in the specific direction in this embodiment. Further, in the present embodiment, the blowing fan is a full type blowing fan that is in the form of a type in which air is discharged from the drum and the air discharged from the drum is sucked toward the exhaust duct, and 1 motor system is used , And the direction in which the air blowing fan rotates in the direction of sucking the air toward the exhaust duct is set to the normal rotation.

In the general drying mode, the above-described process is performed as shown in FIG. 25, and in the high-speed drying mode, the above-described process is performed as shown in FIG. In Fig. 25, after the drive motor rotates normally, the compressor is started to start operation (S110) of the heat pump system. Here, the controller drives the compressor after the forward rotation of the drive motor is performed for a predetermined time. This is for the purpose of enabling the heat pump system to be driven smoothly by driving the compressor after the blowing fan is operated by driving the drive motor as described above.

However, in the high-speed drying mode, the heater operation control (S120) is additionally performed as shown in Fig. In the high-speed drying mode, the dryer uses not only the heat pump system but also the heater as a heat source. Therefore, in this case, the controller activates the heater after detecting that the compressor is operating. This is to prevent the overload of the compressor at the beginning of the drive which can be generated by the heater's priority operation.

The controller senses the operation of the compressor by the heater operation control S120 according to whether the compressor is normally operated. That is, when the temperature change amount? T of the refrigerant detected through the compressor outlet temperature sensor is detected and the temperature change amount of the refrigerant exceeds the predetermined reference value? Tref, the controller can determine that the compressor is normally driven have.

On the other hand, when the user opens the door of the dryer or inputs a pause command after the hybrid dryer starts the drying process, all the devices in which the load is generated must be stopped. Therefore, the load downtime control S180 is performed.

When the user selects the normal drying mode and the load downtime control S180 is performed, the controller senses a stop command or a situation (S181) and immediately stops the operation of the compressor (S182). The controller stops the drive motor (S183) after a predetermined time after the compressor is stopped. This is because, when the drive motor is stopped at the same time, the operation of the blowing fan is also interrupted and the reliability of the heat pump system is affected.

27 shows that the user selects the fast drying mode and the load downtime control S180 is performed. When the drum is driven (S90) and the heat pump system (S110) and the heater (S120) are activated, the controller senses an operation stop command or situation (S181) S182). After the operation of the heater is stopped, the controller stops the operation of the compressor (S183). In addition, the controller stops the drive motor (S184) after a predetermined time after the operation of the compressor is stopped. This is because the characteristic of the hybrid drier is that the heater must be stopped before the heat pump system so that the overload of the compressor can be prevented.

On the other hand, when the dryer in which the temporary operation is interrupted is restarted, the above-described load operation control is performed. Referring to FIG. 26, the controller drives the driving motor or the drum (S90) preferentially. Then, the compressor is driven (S110) so that the heat pump system is operated. Further, in the fast drying mode, the controller senses that the compressor is operating, and then activates the heater (S120).

Here, the drive of the drive motor and the drum by the controller is performed in the order that the controller rotates the drive motor for a short time and then rotates forward. This is not so different from that described in the embodiment of the load operation control described above.

Hybrid dryers use a heat pump system as their primary heat source. The heat pump system absorbs heat energy from the air discharged from the drum by using phase change of the refrigerant, and supplies heat energy to the air supplied to the drum. Therefore, the vapor phase and the liquid phase refrigerant coexist in the evaporator, which is a heat exchanger in which the phase change of the refrigerant occurs.

However, in the state before the dryer is operated, the refrigerant existing in the devices constituting the heat pump system is pneumatically operated, and the refrigerant is present in a liquid phase. Therefore, when the compressor of the heat pump system is operated at the beginning of the operation of the dryer, liquid-phase refrigerant bubbles can be introduced into the compressor. Here, when the liquid coolant bubble flows into the compressor, a leakage current may be generated in the compressor. If there is a leakage current, there is a danger of electric shock. Accordingly, the controller controls the flow rate of the refrigerant to shut off the leakage current generated at the beginning of the compressor operation, thereby operating the heat pump system so that the liquid refrigerant bubble does not flow into the compressor. That is, the controller adjusts the flow rate of the refrigerant through the variable expansion valve (LEV).

Referring to FIG. 28, the step (S110) of operating the heat pump system includes a step S111 of confirming an operation start command of the heat pump system, a step of operating the compressor in a state in which the expansion valve of the compressor is fully closed (S112), and gradually opening the expansion valve (S113) after the compressor is started.

In the initial state, the controller keeps the valve opening (degree of opening) fully closed. In this state, when the compressor driving start command is sensed (S111), the controller starts driving the compressor (S112) and keeps the opening of the valve fully closed for a predetermined time. Thereafter, the opening degree of the valve is gradually increased (S113). This is for restricting the flow of the refrigerant in the liquid phase and using the choking phenomenon in the expansion valve to change the refrigerant into the gaseous state and then introduce it into the compressor.

Fig. 31 shows a change in the degree of opening of such an expansion valve. Referring to FIG. 31, when the controller senses a compressor drive start command, it immediately starts driving the compressor. At this time, the controller keeps the valve opening fully closed for 5 seconds, and then gradually increases the opening degree of the valve.

Increasing the degree of opening of the valve gradually increases the degree of opening of the valve step by step as shown in Fig. For example, after the above-mentioned valve opening for 5 seconds is completely closed, the valve is opened to a minimum opening of 55 pulses, and the opening of the valve is gradually opened step by step for 30 seconds. The increase in the opening of the valve is made until the opening degree of the valve applied to each of the predetermined drying course and the drying mode is reached. For example, if the preset opening degree of the valve is 135 pulses, the valve is opened by 10 pulses in 30 second increments. Here, the numerical values showing the above-described time and the degree of opening of the valve are illustratively shown, and do not limit the scope of the present invention.

On the other hand, in a case where the driving of the compressor is terminated and a predetermined time passes, the refrigerant in the heat pump system becomes a pneumatic pressure. Here, the remaining liquid refrigerant can be introduced into the compressor. Thereby causing a leakage current to be generated in the compressor. Therefore, it is necessary to control the shutdown of the heat pump system.

Here, two cases of compressor termination can be considered. That is, there are cases where the process is terminated normally or abnormally terminated forcibly.

29 shows the shutdown control (S190) of the heat pump system when the compressor is normally terminated. The controller determines the drive end prediction time point of the compressor (S191). The controller completely closes the variable expansion valve (192) a predetermined time before the compressor end prediction time. Here, the predicted time of ending the compressor can be estimated by the time required for each drying course and drying mode set in advance. Referring to FIG. 31, for example, the controller completely closes the opening of the valve 5 seconds before the expected end time of the compressor. This is to restrict the refrigerant flowing into the evaporator side before the operation of the compressor is stopped so as to treat the liquid refrigerant remaining in the evaporator.

Then, the controller stops the operation of the compressor (S193). In addition, the controller gradually opens the valve to the minimum (S194) as shown in Fig. Increasing the opening degree of the valve gradually increases the opening degree of the valve stepwise. For example, after the compressor is shut down, the valve is opened step by step to 55 pulses, which is the minimum opening degree, with 2 pulses open for 35 pulses, 2 pulses open for 45 pulses, and 55 pulses open will be.

When the opening degree of the valve reaches a degree of opening of the valve, the controller completely closes the opening of the valve after a predetermined time (S194). For example, after opening for 3 minutes with 55 pulses, the opening of the valve is fully closed. This is because the refrigerant remaining in the liquid phase remaining in the evaporator is completely exhausted and then the expansion valve is opened little by little so that the refrigerant passing through the expansion valve is expanded to the vapor phase by the choking phenomenon and remains in the evaporator.

30 shows the operation termination control (S200) of the heat pump system when the compressor is abnormally terminated. Referring to FIG. 30, the controller confirms an operation stop command of the compressor (S201). The controller controls the opening of the valve to a fully closed state (S202) upon completion of driving of the compressor. This is because all loads must be stopped immediately if abnormally terminated.

The controller then gradually opens the valve to the minimum (S203). Increasing the opening degree of the valve gradually increases the opening degree of the valve stepwise. For example, the valve is opened step by step to 55 pulses, which is the minimum opening degree, but is opened with 35 pulses for 2 seconds and then 55 pulses.

When the opening degree of the valve reaches a minimum opening degree, the controller fully closes the valve opening (S203) after a predetermined time. For example, after opening for 3 minutes with 55 pulses, the opening of the valve is fully closed.

On the other hand, in the case where the compressor is restarted after the abnormal termination, the embodiment of the step (S110) of operating the heat pump system described above is applied.

On the other hand, in the case of a hybrid drier equipped with a heat pump system, a heater can be used as an additional heat source because the energy efficiency is high but the drying time is long. Therefore, in a high-speed drying mode using a heater as a heat source, there is a fear that an overload occurs in the compressor, or a temperature inside the drum rapidly increases, thereby causing damage to the object to be dried. Accordingly, the controller controls the temperature of the air passing through the drum in order to prevent the inside of the drum from suddenly rising to damage the drying object during driving in the high-speed drying mode.

Temperature control of the air passing through the drum can be seen in two ways. That is, it can be seen from the side for preventing the temperature of the drying object from rising sharply and the side for preventing the temperature of the air supplied into the drum from being so high as not to damage the drying object.

The drum temperature control (S210) is repeatedly operated and stopped according to the temperature of the air supplied to the drum or the temperature of the air flowing out of the drum, from the viewpoint of preventing the temperature of the drying object from rising sharply.

Fig. 32 shows an example of this drum temperature control (S210). The drum temperature control step S210 is performed after the heat pump system is operated (S110) and the heater is operated (S120). 32 is performed in a high-speed drying mode where both the heat pump system and the heater are selected as a heat source.

The drum temperature control step (S210) repeats the operation and stop of the heater according to the temperature of the air supplied to the drum or the temperature of the air flowing out of the drum, and the number of times the heater is stopped to be stopped reaches a predetermined reference frequency , Only the heat pump system is used as the heat source.

The step S210 of controlling the drum temperature includes a step S211 of determining whether the temperature of the air supplied to the drum or the temperature of the air flowing out of the drum is included in a predetermined temperature range during operation of the heater, (S212), stopping the operation of the heater when the measured temperature of the air reaches the upper limit of the temperature range (S212), measuring the temperature of the air supplied to the drum or the temperature of the air flowing out of the drum (S214) whether the temperature is included in the temperature range, and restarting the heater (S215) when the temperature of the air measured during the operation of the heater reaches the lower limit of the temperature range.

32 shows an example of controlling the temperature of the drum based on the temperature of the air flowing out of the drum. Referring to FIG. 32, in step S211, it is determined whether the temperature of the air flowing out of the drum is measured during operation of the heater and is included in the temperature range. In step S211, (Tout1) is measured. This indirectly measures the temperature of the air discharged from the drum since the temperature of the object to be dried can not be measured directly in the drum.

The controller determines whether the temperature Tout1 of the measured air is included in a predetermined temperature range (Tmin to Tmax). The predetermined temperature range may vary depending on the drying course and the drying mode depending on the type of the object to be dried selected by the user. This is because the temperature inside the drum is different depending on the material of the drying object.

Thereafter, when the temperature Tout1 of the drum outlet side air reaches the upper limit value of the temperature range, the controller stops the operation of the heater (S212) to lower the temperature of the air supplied to the drum.

The controller measures the temperature Tout2 of the drum outlet side air during the heater operation stop and determines whether the temperature of the air reaches the lower limit of the temperature range (S214).

When the temperature of the air reaches the lower limit of the temperature range, the controller restarts the heater (S215). If the temperature of the air does not reach the lower limit of the temperature range, the operation of the heater is continuously stopped to prevent the temperature inside the drum from rising.

When the temperature of the air measured during the operation of the heater reaches the lower limit of the temperature range and the heater is restarted (S215), the temperature of the air supplied to the drum or the temperature of the air flowing out of the drum is measured again (S211) whether it is included in the temperature range.

Here, if the temperature Tout2 of the drum outlet side air does not reach the lower limit value continuously, the heater has the same effect as switching to the normal drying mode because the operation is continuously stopped. Alternatively, the controller may automatically switch to the general drying mode after a predetermined time elapses. That is, when the time period during which the temperature of the air measured during the operation of the heater does not reach the lower limit of the temperature range continues for a predetermined time or longer, only the heat pump system may be used as the heat source.

Meanwhile, step S213 may be further performed in which it is determined that the number of times that the temperature of the air measured during operation of the heater reaches the upper limit of the temperature range and stops the operation of the heater does not reach a predetermined reference number. That is, in the case where the process of turning off the heater is repeated by the above-described control, the controller calculates the number n of repetitions and determines whether the number of times N has reached the predetermined number N.

Here, when the number of times of stopping the heater operation reaches a predetermined reference number, only the heat pump system is used as the heat source, so that the drying mode can be automatically switched to the general drying mode.

However, in the case where the number of times of stopping the operation of the heater does not reach the predetermined reference number, the drum temperature control step may be performed in accordance with the temperature of the air supplied to the drum or the temperature of the air flowing out of the drum, Repeat the interruption.

On the other hand, the controller can measure the temperature (Tin1) of the air supplied to the drum through the temperature sensor on the inlet side of the drum in terms of preventing the temperature of the air supplied into the drum from being so high as not to damage the object to be dried have. 32 shows an example of controlling the temperature of the drum by measuring the temperature of the air introduced into the drum.

Referring to FIG. 33, the controller determines whether the measured temperature Tin1 is included in a predetermined temperature range (Tmin to Tmax) (S211). The predetermined temperature range may vary depending on the drying course and the drying mode depending on the type of the object to be dried selected by the user. This is because the temperature inside the drum is different depending on the material of the drying object.

When the temperature Tin1 of the drum inflow side air reaches the upper limit value of the temperature range, the controller stops the operation of the heater (S212) to lower the temperature of the air supplied to the drum.

The controller senses the temperature Tin2 of the drum inlet side air during the operation of the heater, and determines whether the temperature of the air reaches the lower limit of the temperature range (S214). If the temperature of the air does not reach the lower limit of the temperature range, the operation of the heater is continuously stopped to prevent the temperature inside the drum from rising. However, if the temperature of the air reaches the lower limit of the temperature range, the controller restarts the heater (S215).

If the temperature Tin2 of the drum inflow side air does not reach the lower limit value continuously, the operation mode of the heater is stopped, so that the drying mode has the same effect as switching to the normal drying mode. Alternatively, the controller may automatically switch to the general drying mode after a predetermined time elapses.

Meanwhile, when the heater is turned off by the above-described control, the controller calculates the number n of times of repetition and may automatically switch to the general drying mode when the predetermined number N is reached (S213) have.

In the general drying mode of the hybrid dryer, in principle, the cooling fan is not operated except when the cooling fan is operated to control the temperature of the compressor. Thus, heat may accumulate in the compressor, and thus the air entering the drum may be overheated.

In addition, if the object to be dried is dried at a proper drying temperature and it is not necessary to supply heat by a heat source, the dryer is a cooling process in which the object to be dried is cooled to have a humidity and a temperature . However, due to the heat accumulation of the above-described compressor, the temperature inside the drum may not be sufficiently reduced only by the cooling process. Therefore, there is a need to perform cooling control of the drum.

The cooling control S220 of the drum includes a step of stopping the operation of the heat source (S222 to S223), and a cooling step (S224) of cooling the temperature of the drying object. Here, a process of correcting the remaining drying time before stopping the operation of the heat source may be additionally performed. That is, there is further included a step (S221) of modifying the remaining drying time according to the drying degree of the drying object accommodated in the drum, and the operation stopping point of the heat source is changed according to the modified remaining drying time.

Here, since the heat sources are different, it is necessary to judge by dividing the examples in the general drying mode and the high-speed drying mode. Fig. 34 shows cooling control (S220) in the general drying mode, and Fig. 35 shows cooling control (S22) in the high-speed drying mode.

The step of stopping the operation of the heat source may include a pre-cooling step (S222) of interrupting the operation of the heater or activating the cooling fan to pre-cool the temperature of the drum, and stopping the operation of the heat pump system And a cooling entry step S223.

Referring to FIG. 34, the controller senses the degree of drying of the object to be dried by a humidity sensor inside the drum. When the drying degree of the drying object reaches a predetermined reference drying degree, the controller updates the time necessary for completing the drying process including the cooling process (S221).

The controller activates the cooling fan (S222) based on the updated time before a predetermined time from the end time including the cooling process. This is to reduce the heat accumulated in the compressor before entering the cooling process, and to pre-cool the inside of the drum sufficiently to reduce the temperature in the cooling process. The cooling fan is controlled by the controller so that the temperature of the drum outlet side air is sufficiently cooled or until the drying process enters the cooling process.

Then, the controller performs a cooling entering step (S223) in which the operation of the heat pump system is stopped to enter a cooling step. On the other hand, if the temperature of the drum outlet-side air has sufficiently cooled during the cooling process based on the updated time, the controller finishes the cooling process after a predetermined time regardless of the updated time, and ends the drying process. Otherwise, the drying process is terminated by the updated time.

On the other hand, in the high-speed drying mode, the cooling fan is operated, but the temperature inside the drum is not sufficiently reduced only by the execution time of the predetermined cooling process. Even in this case, the controller can control the temperature inside the drum to be sufficiently reduced.

Referring to FIG. 35, the controller senses the degree of drying of the object to be dried by a humidity sensor inside the drum. When the drying degree of the drying object reaches a predetermined reference drying degree, the controller updates the time necessary for completing the drying process including the cooling process (S221).

Based on the updated time, the controller stops operation of the heater (S222) before a predetermined time from the entry of the cooling process. If the entry time of the cooling process is less than the preset time based on the renewed time, the operation of the heater is stopped after updating the entering time of the cooling process at the predetermined time.

The controller uses only the heater pump system as the heat source for the predetermined time, and then the operation of the heat pump system is terminated and the cooling process is entered (S223). The above configuration is to pre-cool the heat accumulated in the compressor before entering the cooling process so that the temperature inside the drum can be sufficiently reduced in the cooling process.

Here, if the temperature of the drum outlet side air is sufficiently cooled during the cooling process based on the updated time, the controller finishes the cooling process after the predetermined time regardless of the updated time, and ends the drying process. Otherwise, the drying process is terminated by the updated time.

On the other hand, during the drying in the normal drying mode and the high-speed drying mode, the cooling fan may be operated or the operation of the heater may be stopped, and the opening of the expansion valve may be reduced to reduce the flow rate of the refrigerant. .

In the drum of the dryer, the object to be dried is rotated by contact with the inner peripheral surface of the drum and the lifter, and dried. In such a case, the object to be dried may be twisted due to the continuous rotation, which may cause wrinkling, creasing, or the like at a later time.

Therefore, in general, in order to prevent twisting of the object to be dried, the drum is rotated forward at a predetermined cycle, and then the drum is rotated counterclockwise for a short time to prevent twisting of the object to be dried.

In the case of a dryer in which a blower fan is interlocked with a driving motor of a drum, the blower fan rotates in reverse when the drum is rotated in reverse, which may impede the flow of air. In particular, in the case of a hybrid drier, overload of the compressor may be a problem if air does not flow. Moreover, overloading of the compressor may be more problematic in a fast drying mode where additional thermal load is imposed.

In the normal drying mode, an example in which such anti-spattering control or step S230 is performed is shown in Fig. Referring to FIG. 36, when the drive motor is operated, the controller is driven so that forward rotation and reverse rotation of the drive motor are alternately repeated. In this case, for convenience, the forward rotation time is T1 and the reverse rotation time is T2. The forward and reverse rotation of the drum, which is started in the anti-twisting step, is performed until the cooling step is completed.

Thereafter, the heat pump system is operated (S110), and the controller determines whether the drying object has reached a specific drying degree by a predetermined time or by a humidity sensor inside the drum (S232). Here, the specific degree of drying refers to the degree of drying which increases the possibility that wrinkles are generated by drying the object to some extent sufficiently.

When the drying object has reached a specific drying degree, the controller repeatedly performs the normal rotation for the time T3 and the reverse rotation for the time T2 (S232). At this time, the time T3 is shorter than the time T1. That is, the period of normal and reverse rotation of the drum in the anti-twisting step may be changed according to the degree of drying of the object to be dried contained in the drum.

More preferably, the T3 time is 1/3 of the T1 time. This is to shorten the forward and reverse rotation periods in the drying section where wrinkling is likely to occur in the drying object, and to release the kinking more frequently.

Thereafter, the dryer performs the pre-cooling step (S222) described above and performs the cooling step (S224). Here, the controller ensures that the driving of the drum before and after the reverse rotation of the drum is completed immediately before the drying process is completed. This is to finally twist the object to be dried to prevent wrinkling of the object to be dried.

In the fast drying mode, an example in which such anti-creasing control or step S230 is performed is shown in Fig. Referring to Fig. 37, the drive motor is operated by the above-described load actuation control (S90) d. In this case, the controller controls the drum to rotate forward after the start of the drying process without rotating the drum.

Thereafter, the controller repeatedly performs the normal rotation and the reverse rotation of the drum before the heater is stopped and enters the cooling process. Here, the time at which the forward / reverse rotation of the drum is started can be specified after a predetermined time elapses after the operation of the heater is stopped to enter the pre-cooling step (S222). The forward and reverse rotation of the drum, which is started in the anti-twisting step, is performed until the cooling step, that is, the cooling step is completed.

For example, the heater is stopped and the drum is rotated in the forward and reverse directions after 5 minutes. In order to prevent overload of the compressor due to residual heat by preventing the reverse rotation because the compressor may be overloaded while the heater is in operation and preventing the reverse rotation of the drum for a predetermined time even after the heater is stopped to be.

On the other hand, the controller ensures that the driving of the drum before and after the reverse rotation of the drum is completed immediately before the drying process is completed. This is to finally twist the object to be dried to prevent wrinkling of the object to be dried.

In the heat pump system of the hybrid drier, the compressor may be provided with a breaker (OLP) capable of forcibly stopping the operation of the compressor in order to ensure the reliability of the heat pump system due to overload of the compressor.

Accordingly, when the compressor is operated due to the operation of the OLP, if the heater is still operated in the high-speed drying mode, the safety of the dryer may be a problem. Accordingly, it is necessary to control the OLP heater (S240) in which the controller recognizes the OLP operation and stops the operation of the heater. Such OLP heater control is shown in Fig.

Referring to FIG. 38, if the hybrid drier is performing the drying process in the fast drying mode, the controller performs the OLP motion sensing step (S241). The controller senses the temperature difference (Tin1-Tout1) between the refrigerant on the inlet side of the evaporator and the refrigerant on the outlet side of the evaporator. If the temperature difference is smaller than the predetermined minimum difference, the controller regards it as the OLP operation of the compressor and stops the operation of the heater (S242).

The controller senses the temperature difference between the inlet refrigerant of the evaporator and the outlet refrigerant of the evaporator (S243). Only when the temperature difference exceeds a predetermined minimum difference, the controller restarts the heater (S244). This is because, if the temperature difference exceeds a preset minimum difference, the controller assumes that the OLP operation of the compressor has ended.

On the other hand, the hybrid drier may have a steam injection function. Here, the steam is generated by the steam generator. On the other hand, the steam generator can not be used simultaneously with the heater. This means that both the steam generator and the heater require a lot of power, so they do not operate at the same time. However, the drum is rotated while steam is being sprayed. Therefore, the blowing fan is also operated, and the steam can be circulated on the circulating flow path.

Here, the heater has a structure of an electric heating wire coupled to an insulator, and the steam circulated on the circulating flow channel can be condensed around the electric heating wire. This condensed condensate can enter the internal circuit through the insulator. Therefore, there is an accident risk due to the leakage current.

Therefore, when the controller receives the start command of the steam injection process, it only activates the heater for a certain period of time before the stem is generated. Thereafter, the controller stops the operation of the heater and proceeds the steam stroke.

Here, the controller intermittently stops the steam generation during the steam stroke and repeats the control for activating the heater for a predetermined period of time. Accordingly, it is possible to preheat the heater before the steam is sent to the heater so that the steam is evaporated immediately without being condensed in the heater.

Meanwhile, the above-described methods of controlling the dryer can be summarized centering on the operation and interruption of the heat source. Fig. 39 shows a procedure for controlling the dryer based on the operation and interruption of the heat source.

In particular, in the case of a hybrid dryer using a heat pump system and a heater as a heat source as in the present invention, the order of operation and interruption of such a heat source may have important significance. Moreover, in a dryer in which the heat pump system is operated as a main heat source and the heat supply capacity of the heat pump system is equal to or higher than the heat supply capacity of the heater, the operation order of such heat sources may be meaningful.

39, when the heat pump system and the heater are selected as the heat source, the heat pump system may be operated (S110). After the heat pump system is normally operated, the heater (S222) of terminating the operation of the heater to finish the drying by cooling the drum after the drying progresses, and terminating the operation of the heat pump system after the operation of the heater is completed (S212).

Here, before the heat pump system is started, a step S90 of operating the drum by driving the driving motor is further provided. Wherein the step of operating the drum starts to rotate after reverse rotation of the drive motor, and the step of operating the heat pump system is started after the drive motor is rotated forward.

The aspect of the above-described configuration allows the drum to be driven by the drive motor before the heat pump system is started, so that the load is sequentially operated. Since this has been described in detail in the above-described load operation control, a detailed description will be omitted.

The controller may further include a step S121 of determining whether the compressor included in the heat pump system is normally operated before the heater is operated so that the operation S122 of the heater is performed when the normal operation of the heat pump system And can be controlled to be performed after confirmation. The step S121 of determining whether the compressor operates normally is determined by comparing a temperature change amount of the refrigerant that has passed through the compressor with a predetermined reference temperature change amount.

The controller may further include a compressor temperature control step (S150) for controlling the temperature of the compressor for stability of the heat pump system even after the heater is normally operated. The compressor temperature control step (S150) controls the operation and stop of the heater to be repeated according to the temperature of the refrigerant passing through the compressor. Since the compressor temperature control step (S150) has been described in detail in the above-described compressor temperature control, a detailed description will be omitted.

If the temperature of the refrigerant measured during the operation stop of the heater exceeds the upper limit of the temperature range or is not reached within the predetermined time at the lower limit of the temperature range to prevent overload of the heat pump system, And a valve control step (S175) for controlling the degree of opening of the expansion valve included in the system.

The valve control step (S175) performs drying using only the heat pump system as a heat source for restarting the heater according to the temperature of the refrigerant passing through the compressor or for heating the air supplied to the drum. Since the valve control step S175 has been described in detail in the above-described compressor reliability protection control, a more detailed description will be omitted.

The controller may further include a drum temperature control step (S210) for controlling the temperature of the drum after the heater is activated. The drum temperature control step (S210) repeats the operation and stop of the heater according to the temperature of the air supplied to the drum or the temperature of the air flowing out of the drum, and the number of times that the heater is shut down is less than a predetermined reference number It is controlled to use only the heat pump system as the heat source. Since the drum temperature control step S210 has been described in detail in the above-mentioned drum temperature control, a detailed description will be omitted.

The control method of the dryer may further include a step (S130) of determining clogging of the filter through which the air flowing out of the drum flows according to the temperature of the air flowing into the drum. Here, the step of determining clogging of the filter may stop the operation of the heat pump system depending on whether the filter is clogged or not. The step of determining clogging of the filter (S130) has been described in detail in the above-described filter clog control, so that detailed description is omitted.

According to an embodiment of the control method of the dryer, the step S140 of re-determining the clogging of the filter in accordance with the temperature difference between the air flowing into the drum and the air flowing out of the drum after a predetermined time . In such a case, it is determined whether or not the operation of the heat source is stopped according to a result of re-determination of the clogging of the filter. The step of re-determining the clogging of the filter (S140) has been described in detail in the above-described filter clogging during drying, so that detailed description is omitted.

While the preferred embodiments of the present invention have been described with reference to the accompanying drawings, it is to be understood that the scope of the present invention should not be construed as being limited to the embodiments and / or drawings, do. It is to be expressly understood that improvements, changes and modifications apparent to those skilled in the art are also within the scope of the present invention.

10: drum 20: drive motor
30: blower fan 40: heater
50: Suction duct 60: Exhaust duct
70: Heat pump system 71: Evaporator
72: compressor 73: condenser
74: expansion valve 80: cooling fan
100: dryer 110: main body
120: control panel 130: door
140: inlet 150: drawer
200: controller

Claims (26)

main body;
A drum rotatably mounted in the main body;
A heater pump system for heating the air supplied to the drum;
A control panel including a drying mode selecting means provided in the main body and capable of selecting a heat source for heating the air supplied to the drum; And
And a controller for controlling the drum and the heat pump system and the heater in accordance with the instruction inputted by the drying mode selecting means,
The control panel includes:
Drying course selecting means capable of selecting a different drying method depending on the object to be dried; And
Further comprising display means for displaying a drying mode selected by the drying mode selecting means or a drying course selected by the drying course selecting means,
The controller comprising:
Wherein at least one of the heat pump system and the heater is selected and operated as a heat source for heating the air supplied to the drum in accordance with the instruction inputted by the drying mode selecting means,
The drying mode selection means controls the display means to display a drying mode which can be selected by the drying mode selection means in accordance with the instruction inputted by the drying course selection means,
Characterized in that the drying mode selectable by the drying mode selecting means is activated to the display means only when the drying mode selecting means selects the drying mode by the drying mode selecting means As a result,
And a drying mode selecting means.
delete delete The method according to claim 1,
The controller comprising:
The drying mode is displayed on the display means in accordance with the instruction inputted by the drying course selection means,
And the predetermined drying mode displayed on the display means can be changed to the drying mode selected by the drying mode selecting means in accordance with the selection of the drying mode selecting means.
And a drying mode selecting means.
5. The method of claim 4,
Wherein the predetermined drying mode is a drying mode using the heat pump system as a heat source for heating the air supplied to the drum or a drying mode using the heat pump system and a heater,
And a drying mode selecting means.
The method according to claim 1,
Wherein the controller displays a drying mode selectable by the drying mode selecting means at a position corresponding to the drying mode selecting means,
And a drying mode selecting means.
delete delete The method according to claim 1,
Wherein the controller operates the drying course according to the instruction inputted by the drying course selecting means and activates the heat source for heating the air supplied to the drum in accordance with the instruction inputted by the drying mode selecting means.
And a drying mode selecting means.
The method according to claim 1,
The controller comprising:
Only when the drying course in which the drying mode can be selected by the drying mode selecting means is selected by the drying course selecting means,
And a heat source for heating the air supplied to the drum in accordance with the drying mode selected by the drying mode selecting means.
And a drying mode selecting means.
5. The method of claim 4,
The controller comprising:
Only when the drying course in which the drying mode can be selected by the drying mode selecting means is selected by the drying course selecting means,
And a heat source for heating the air supplied to the drum in accordance with the drying mode selected by the drying mode selecting means or the predetermined drying mode.
And a drying mode selecting means.
The method according to claim 1,
The controller comprising:
Only when the drying course in which the heat pump system and the heater can be used as the heat source for heating the air supplied to the drum is selected by the drying course selecting means,
Characterized in that the heat pump system and the heater are movable as a heat source for heating the air supplied to the drum.
And a drying mode selecting means.
13. The method of claim 12,
The controller
Even when a drying course using a heat pump system and a heater as a heat source for heating the air supplied to the drum is selected by the drying course selection means, Only when the drying mode using the heat pump system and the heater is selected,
And a heat pump system and a heater are operated as a heat source for heating the air supplied to the drum.
And a drying mode selecting means.
The method according to claim 1,
The drying course selecting means is a rotatable dial knob,
Characterized in that the drying course selection means is characterized in that drying courses which can be selected as a drying mode by the drying mode selection means are distinguished and displayed around the dial knob or the dial knob,
And a drying mode selecting means.
The method according to claim 1,
The control panel may further include a drying course selection unit that can select a different drying method depending on the object to be dried, wherein the drying mode selection unit and the drying course selection unit are integrally formed to differentiate the operation of one selection unit And,
Characterized in that the controller displays the selected drying course and drying mode on the display means in accordance with the instruction inputted by the operation of the one selecting means,
And a drying mode selecting means.
16. The method of claim 15,
Said one selecting means being a rotatable dial knob,
Selectable drying courses and drying modes for each drying course are displayed around the dial knob,
Characterized in that the dial knob is divided and displayed for each drying mode,
And a drying mode selecting means.
16. The method of claim 15,
Wherein the one selecting means is a push button or a touch button,
Characterized in that the drying courses and the drying modes for each drying course are changed according to the selected number of push buttons or touch buttons.
And a drying mode selecting means.
18. The method according to any one of claims 1, 4, 6, and 17 to 17,
The controller can automatically change the heat source for heating the air supplied to the drum according to the temperature of the air passing through the drum or the temperature of the refrigerant of the heat pump system irrespective of the instruction inputted by the drying mode selecting means As a result,
And a drying mode selecting means.
18. The method according to any one of claims 1, 4, 6, and 17 to 17,
Wherein the drying mode includes a general drying mode in which only the heat pump system is operated as a heat source and a high speed drying mode in which the heat pump system and the heater are operated as a heat source.
And a drying mode selecting means.
The method of claim 19, wherein
Wherein the drying mode further comprises a special drying mode in which only the heater is operated as a heat source.
And a drying mode selecting means.
19. The method of claim 18,
Wherein the heat pump system includes an evaporator which is cooled by heat exchange with air discharged from the drum, a compressor, a condenser and an expansion valve that heat by exchanging heat with air supplied to the drum,
Characterized in that the capacity of the evaporator is smaller than the capacity of the condenser.
And a drying mode selecting means.
The method according to claim 1,
Wherein the control panel further comprises a fee saving mode selecting means,
The controller controls the starting point of the heat source for heating the air supplied to the drum based on the power information supplied from the outside in accordance with the instruction inputted by the charge saving mode selecting means, Lt; RTI ID = 0.0 > a < / RTI > heat source,
And a drying mode selecting means.
The method according to claim 1,
And an energy management device capable of adjusting a starting time of a heat source for heating the air supplied to the drum or changing a heat source for heating air supplied to the drum based on power information supplied from the outside,
And a drying mode selecting means.
24. The method of claim 23,
The energy management apparatus includes a display unit that displays power information supplied from the outside, an input unit that can select the operation of the energy management apparatus, and a control unit that sends a control signal to the controller according to an instruction input by the input unit.
And a drying mode selecting means. delete delete

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