KR101549860B1 - ductless dryer - Google Patents

Abstract

A ductless dryer is started. In the present invention, the ductless dryers are operated safely by insulating the ground of the dryer main body from the circuit for detecting the dryer abnormality based on the flame detected through the flame sensor using the insulation means, and the reliability of the flame sensor as a safety device is improved .

Ductless Dryer, Flame Sensor, Insulation

Description

Ductless Dryer {DUCTLESS DRYER}

The present invention relates to a ductless dryer, and more particularly, to a ductless dryer that improves the reliability of a ductless dryer by separating the ground of the dryer body from a circuit that detects a dryer abnormality based on the flame detected through the flame sensor by using insulation means The present invention relates to a ductless dryers.

Generally, a clothes dryer is a device for blowing hot air generated by a heater into a drum to absorb moisture of a drying subject to dry the drying subject, and is a device for absorbing moisture and drying the drying subject, Depending on the method, it is classified into an exhaust type clothes dryer and a condensation type clothes dryer.

The exhaust-type clothes dryer uses a method of exhausting the wet machine exhausted from the drum to the outside of the dryer. However, it requires an exhaust duct to exhaust the evaporated moisture in the drum to the outside, and in particular, since carbon monoxide, which is a combustion product, is exhausted together, it is disadvantageous in that the exhaust duct must be extended to the outside.

On the other hand, the condensable clothes dryer uses a method of condensing moisture from the drum to remove moisture from the heat exchanger, and then re-circulating the moisture-free dry air to the drum again. However, it is not easy to use gas as a heat source because the dry flow forms a closed loop.

The dryer that overcomes the disadvantages of the exhaust type clothes dryer and the condensation type clothes dryer is a ductless dryer. That is, the ductless dryers are advantageous in that they can be maintained at a low cost by using gas as a heat source and do not need a separate exhaust duct extending outdoors.

On the other hand, the ductless dryers include a flame sensor for judging the flammable state of the salt generated during incomplete combustion as an electrical signal, and for blocking the operation of the dryer when a dangerous situation occurs as a result of the determination . Such a flame sensor utilizes the principle that electricity is carried by the salt during combustion. The safety device using the flame sensor is performed by determining an electrical signal sensed through the flame sensor using a control unit and then supplying an ON / OFF signal to the dryer operation device.

However, since the ground of the flame sensor and the control unit and the ground of the dryer body connected to the hot air supply unit are different from each other, accurate voltage detection can not be performed.

In addition, since the error signal is generated in the dryer operation device due to the voltage erroneous detection, the reliability of the ductless dryers and the safety devices is lowered.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a ductless dryers which can reliably detect the reliability of the ductless dryers by separating the ground of the dryer main body from the circuit for detecting a dryer abnormality based on the flames sensed through the flame sensor Wherein the duct-less dryer has an improved duct-less dryer.

According to an aspect of the present invention, there is provided a ductless dryer including a hot air supply unit for supplying hot air into a dryer, a flame sensor for detecting a flame discharged from the hot air supply unit, A control unit for judging the presence or absence of an abnormality of the dryer, and an insulation means for electrically insulating the hot air supply unit and the flame sensor.

According to the present invention, it is possible to accurately detect the voltage corresponding to the flame from the hot air supply unit by separating the ground of the dryer body connected to the ground of the flame sensor and the control unit and the hot air supply unit using insulation means.

In addition, according to the present invention, it is possible to accurately detect the abnormality of the ductless dryers by separating the ground of the dryer main body to which the ground of the flame sensor and the control unit and the hot air supply unit are connected, So that the reliability can be improved.

Hereinafter, a ductless dryers according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 5, a ductless dryers according to an embodiment of the present invention includes a hot air supply unit 140 for supplying hot air into a dryer, and a hot air supply unit 140 for detecting a flame discharged from the hot air supply unit 140 A control unit 200 for determining whether or not the dryer is abnormal based on the flame detected through the flame sensor 160, And insulation means 190 for electrically isolating the electrodes.

The heating unit may further include a turning unit 147 connected to the insulating means 190 and promoting mixing of gas and air in the hot air supplying unit 140, And is electrically connected to the flame sensor 160 through the flame sensor 160.

The ductless dryers according to the present invention include a main body 110 forming an outer appearance, a drum 120 accommodating a drying object and being rotatably installed in the main body 110, air discharged from the drum 120 And a heat exchange unit 150 for removing water contained in the heat exchange unit 150.

A door 111 for putting clothes into the drum 120 is installed on the front surface of the main body 110 and a foot 113 for supporting the main body 110 is installed on the bottom side. A belt 131 for rotating the drum 120 and a motor 135 for providing a driving force to the belt 131 are installed in the main body 110. [ A pulley is attached to the shaft of the motor 135 so that the belt 131 is caught.

The drum 120 includes a plurality of lifters 121 capable of lifting clothes, and a drum 120 having an inner space to allow the clothes or the like to be dried to be inserted.

The hot air supply unit 140 includes a gas valve 141 for supplying and shutting off gas, a gas combustor 143 for mixing the gas exhausted from the gas valve 141 with air supplied from the outside, And a hot air supply duct 145 connecting the gas combustor 143 and the drum 120 so that the generated hot air is supplied to the drum 120. The gas valve 141 preferably uses a solenoid valve so that the gas injection amount can be sensitively controlled. The gas combustor 143 is connected to the gas valve 141 to mix the gas exhausted from the gas valve 141 and the outside air to burn the mixture, and then heat the air with heat generated at this time. The hot air generated by the heating is supplied to the drum 120 through the hot air supply duct 145.

The heat exchanging unit 150 is composed of a fin 151 and a tube 153. The heat exchanging unit 150 condenses the hot and humid air that has passed through the drum 120 by the heat exchange between air and water, . The inlet of the heat exchange unit 150 is connected to the drum 120 by the circulation unit 180, and the outlet of the heat exchange unit 150 is connected to the exhaust duct 181. The fins 151 are laminated so as to allow a plurality of thin plates to vertically contact and pass through hot and humid air at fine intervals with a thin metal sheet having excellent conductivity. The tube 153 circulates water at a low temperature (for example, 22 ° C) inside and passes through the pin 151 in a reciprocating manner. At both ends of the tube 153, a water hose (not shown) is connected to supply and recover low-temperature water. At the lower portion of the heat exchange unit 150, a storage unit for collecting the condensed water generated during the condensation process and falling down is provided.

In the ductless dryers according to the embodiment of the present invention, the spot welding of the conventional rotary unit 147 and the gas combustor 143 is performed using a ceramic material, which is insulating means 190, instead of spot welding. Thus, a circuit free from grounding of the main power line or external noise can be constructed, and the reliability of the flame sensor 160 as a safety device can be secured.

In the present invention, the control unit 200 detects the voltage from the formed circuit, and detects the oxygen concentration in the hot air supply unit based on the detected voltage. Here, the method of sensing the oxygen concentration may be a method of preliminarily preparing a table of the oxygen concentration with respect to the voltage, thereby detecting the oxygen concentration or detecting the oxygen concentration by constructing the detection algorithm. have.

1 to 4 and 6, a ductless dryer according to another embodiment of the present invention includes a hot air supply unit 140 for supplying hot air into a dryer, a flame discharge unit 140 for discharging hot air from the hot air supply unit 140, A control unit 200 for determining whether the dryer is abnormal based on the flame sensed through the flame sensor 160 and a flame sensor 160 for detecting the flame detected by the flame sensor 160. [ And insulating means (191) for electrically insulating between the electrodes (160, 160).

The contents described in the above embodiment are replaced with the following, and the following description is omitted.

The ductless dryers according to other embodiments of the present invention combine insulating materials such as ceramics with bolts or rivets instead of ceramic materials as insulating means.

The present invention prevents flame from being formed on the body and the electric circuit via the flame sensor 160, the swing unit 147, the gas combustor 143, and the fixed frame through the insulating means. In other words, the grounding of the power line that supplies electric power to the main body by the insulating means such as ceramic between the revolving unit 147 and the gas combustor 143, that is, the mixing tube of the revolving unit 147 and the gas combustor 147, Lt; / RTI > At this time, the position where the insulation means is installed may be changed, and it is only required to prevent the electric circuit from being formed between the body and the flame sensor 160 via the flame sensor 160, the swing unit 147, the gas combustor 143, and the fixed frame.

That is, in the above description, ceramic is exemplified as the insulating means, and the ceramics are bonded between the revolving unit 147 and the gas combustor 143 or they are connected by using bolts. However, The location may vary.

Here, the control unit 200 detects a voltage from the formed circuit, and senses the oxygen concentration in the hot air supply unit based on the detected voltage. Here, the method of sensing the oxygen concentration may be a method of preliminarily preparing a table of the oxygen concentration with respect to the voltage, thereby detecting the oxygen concentration or detecting the oxygen concentration by constructing the detection algorithm. have.

Hereinafter, the operation of the ductless dryers according to the present invention will be described with reference to FIGS.

7 is a voltage detection circuit diagram using the flame sensor according to the present invention. This is a circuit diagram in which the flame sensor 160 is connected to the control unit 200 when a flame is generated.

The voltage (S +, S-) applied to the resistor R4 is measured based on a constant voltage (Vin +, Vin-) applied to the control unit 200 in the circuit formed by the flame generated from the gas combustor 143, The combustion state is detected. In Fig. 7, R1, R3, R4, and C represent resistors and capacitors for measuring voltage without error. For example, R1 may be set to 20Kohm, R3 to 62Kohm, R4 to 2Mohm, and C to 0.01uF. On the other hand, R2 represents the resistance value of the flame for electrically connecting the flame sensor 160 and the swing unit 147. When there is no flame, the connection between the flame sensor 160 and the swing unit 147 is opened, Becomes infinite, and if there is a flame, it has a specific resistance value. That is, the flame serves as a kind of variable resistor in the electric circuit between the flame sensor 160 and the swing unit 147, and the resistance value of R2 representing the resistance value of the flame can be varied according to the flame. The value is slightly different depending on the combustion state, but generally shows a resistance value of 2Mohm.

FIG. 8 is a view showing a voltage detected using a flame sensor according to a conventional technique, and FIG. 9 is a view showing a voltage detected using a flame sensor according to the present invention.

FIG. 8 shows that when the ground of the power line supplied to the ductless dryers is not insulated, a large difference occurs in the voltage measured from the flame sensor 160 depending on whether or not the power line is grounded. In other words, unless the insulation is conventionally performed, since the voltage measured by the flame sensor 160 is greatly different between the case where the power line is grounded (A) and the case where the power line is not grounded (B), reliability as a safety device do.

9 shows that there is no large difference in the voltage measured from the flame sensor 160 regardless of whether or not the power line is grounded, when the power line supplied to the ductless dryers according to the present invention is grounded. In other words, since there is no difference in the voltage measured by the flame sensor 160 when the power line is grounded (C) and when the power line is not grounded (D), reliability as a safety device is assured.

1 is a schematic view of a ductless dryer according to the present invention;

FIG. 2 is a plan view schematically showing the interior of the ductless dryers of FIG. 1; FIG.

FIG. 3 is a side view of the ductless dryers of FIG. 1; FIG.

FIG. 4 is a schematic view of the ductless dryers of FIG. 1 including power ground; FIG.

FIG. 5 is a view illustrating a safety device of a ductless dryer according to an embodiment of the present invention; FIG.

6 is a view illustrating a safety device of a ductless dryer according to another embodiment of the present invention;

7 is a voltage detection circuit diagram using a flame sensor according to the present invention;

FIG. 8 is a view showing a voltage detected using a flame sensor according to the related art; FIG. And

9 is a diagram showing a voltage detected using a flame sensor according to the present invention.

Claims (5)

A hot air supply unit for supplying hot air into the dryer; A flame sensor for detecting a flame discharged from the hot air supply unit; A control unit for determining an abnormality of the dryer based on the flame detected through the flame sensor; And And an insulating means for electrically insulating the hot air supply unit and the flame sensor. The method according to claim 1, And a swirling unit connected to the insulating means for promoting mixing of gas and air in the hot air supply unit, Wherein the pivot unit is electrically connected to the flame sensor through the flame by contacting the flame with which the conductive flame is made to contact the flame sensor. The method according to claim 1, Wherein said insulating means is formed of a ceramic material. The method according to claim 1, Wherein the flame sensor is electrically connected to the control unit through the flame by making contact with the flame on which the conductive is made. 5. The method of claim 4, Wherein the control unit detects a voltage from an electrical circuit formed electrically connected to the flame sensor through the flame and detects the oxygen concentration in the hot air supply unit based on the detected voltage. .

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