WO2023120926A1

WO2023120926A1 - Clothes dryer and anti-icing driving method

Info

Publication number: WO2023120926A1
Application number: PCT/KR2022/016178
Authority: WO
Inventors: 김도경; 정민준; 정승은; 금동호; 이호철; 최한규
Original assignee: 삼성전자 주식회사
Priority date: 2021-12-22
Filing date: 2022-10-21
Publication date: 2023-06-29
Also published as: KR20230095422A

Abstract

Various embodiments of the present disclosure relate to a condensing type clothes dryer that predicts the risk of icing in advance, notifies a user of the risk in advance, and provides driving to a previously prepared, anti-icing mode according to selection by the user. The clothes dryer for this purpose may comprise: a temperature acquisition unit for acquiring a temperature value; a drum configured to accommodate an object to be dried; a passage which guides air discharged from the inside of the drum to the outside, back into the drum; a heat pump system which is configured to heat the air introduced into the drum, and includes a compressor, a condenser, an expansion valve, and an evaporator, in which a refrigerant circulates; and a controller, wherein the controller may control, in response to receiving, from the user, an operation command for an anti-icing mode, such that a heating operation in which the compressor is driven for a first period of time and then stopped for a second period of time is repeatedly performed a plurality of times.

Description

How to drive a clothes dryer and anti-icing

The present disclosure relates to a clothes dryer, and more particularly, to a clothes dryer that predicts the risk of freezing in advance, notifies the user of the risk in advance, and provides driving in a previously prepared anti-icing mode according to the user's selection, and the same It's about control methods.

A clothes dryer is a device for drying objects to be dried by supplying hot air to the inside of a drum while rotating at low speed a drum accommodating various objects to be dried, including clothes, towels, and blankets of various materials. In general, clothes dryers include an exhaust dryer that directly discharges humid air discharged from a drum to the outside after heat exchange with an object to be dried in a drum, and a dryer that directly discharges humid air discharged from the drum to the outside. Instead, it can be classified as a circulation type (or condensation type) dryer that circulates back into the drum through a dehumidifying and heating process. The condensation dryer has a heat pump system composed of a compressor, a condenser, an expansion valve, and an evaporator, and is configured to circulate a refrigerant therebetween. In the case of a condensation type dryer, humid air discharged from the drum exchanges heat (and dehumidifies) through contact with the evaporator of the heat pump system, is heated through the condenser, and is introduced into the drum again in a hot and dry state. In addition, condensed water condensed from the air forms on the surface of the evaporator in the heat exchange process described above. Condensate on the surface of the evaporator accumulates on the bottom of the base and moves to the pump room, and the pump operates to discharge the condensate collected in the pump room to the outside based on a certain period or a certain water level.

In the case of a condensation type dryer, when the outdoor temperature of the space in which the dryer is installed decreases, the condensate remaining inside the dryer may freeze, and the freezing of the condensate water may prevent the dryer from operating properly. For example, freezing of condensate remaining on the surface of the evaporator lowers the heat exchange rate with air discharged from the drum. For example, when the condensate remaining in the hose inside the clothes dryer freezes, smooth drainage is hindered. For example, freezing of condensate remaining in the pump chamber restricts the impeller of the pump, preventing pump operation, and accordingly, condensate is not discharged from the pump chamber, and the clothes dryer may be in a drainage failure detection state. When ice formation occurs in the clothes dryer, various methods for removing ice have been tried. All of these methods are ex post and require considerable time and effort until the ice is removed, causing inconvenience to the user. In addition, among methods commonly attempted to remove ice, there are many that have a high possibility of causing a safety accident or a breakdown of the clothes dryer during the attempt, such as pouring hot water into the pump room.

In one aspect of the present disclosure, when there is a risk of freezing, it can be driven in an anti-icing mode to prevent the occurrence of icing in advance, and in particular, it can effectively prevent icing while minimizing noise or power consumption generated by driving the dryer. An object of the present invention is to provide a clothes dryer capable of being driven in an anti-icing mode and a method of driving the anti-icing mode.

Another aspect of the present disclosure is to provide a clothes dryer capable of predicting the risk of icing in advance, notifying the user of the risk in advance, and operating in a preset anti-icing mode according to the user's selection.

According to one aspect of the present disclosure, a clothes dryer includes a temperature acquisition unit that obtains a temperature value, a drum configured to accommodate an object to be dried, and a guide for air discharged from the inside of the drum to the outside to be introduced into the drum again. A heat pump system including a flow path, a compressor configured to heat air introduced into the drum and circulating a refrigerant therein, a condenser, an expansion valve, and an evaporator, and a control unit, wherein the control unit is configured to prevent freezing from a user. In response to receiving an operation command to prevent mode, a heating operation in which the compressor is driven for a first time and then stopped for a second time may be repeatedly performed a plurality of times.

According to another aspect of the present disclosure, a temperature sensor, a drum, a blower fan for circulating air in and out of the drum, a motor for rotationally driving the blower fan, a heat pump including a compressor, and heating air supplied to the drum An anti-icing driving method of a clothes dryer including a heater comprising: a first operation of driving the motor, the compressor, and the heater for a first time based on an operation specification determined according to the temperature measured by the temperature sensor; and A heating operation of repeating a second operation of stopping the motor, the compressor, and the heater a plurality of times for a second time period, and a cooling operation of driving the motor while the compressor and the heater are stopped for a third time period. can do.

In the case of the clothes dryer according to various embodiments of the present disclosure, even if the outside air temperature is lowered, the internal temperature of the clothes dryer is maintained so as not to drop to the freezing temperature through driving in the anti-icing mode, so that the user can avoid inconvenience caused by the occurrence of ice. Whenever you want to dry without suffering, you can conveniently use that clothes dryer. A clothes dryer and an anti-icing driving method according to various embodiments of the present disclosure minimizes driving of a motor, a compressor, and a heater within a range that produces an anti-icing effect, so that power is not excessively wasted for anti-icing. It can also prevent excessive noise generation from occurring. The clothes dryer according to various embodiments of the present disclosure predicts the risk of freezing in advance when the outdoor temperature decreases and notifies the user of the risk, so that the user recognizes the risk of preventing freezing and takes appropriate precautionary measures accordingly. can make it

Effects obtainable in the exemplary embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned are common knowledge in the art to which exemplary embodiments of the present disclosure belong from the following description. can be clearly derived and understood by those who have That is, unintended effects according to the implementation of the exemplary embodiments of the present disclosure may also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

1 is an external perspective view of a condensing type clothes dryer 100 according to an embodiment of the present disclosure.

FIG. 2 is a side cross-sectional view of the condensing type clothes dryer 100 shown in FIG. 1 .

FIG. 3 is a diagram conceptually illustrating an air circulation path that circulates inside and outside the drum 120 of the condensing type clothes dryer 100 shown in FIG. 1 and a refrigerant circulation path of the heat pump system 150 .

FIG. 4 is a functional block diagram schematically showing the operation function of the condensing type clothes dryer 100 of FIG. 1 according to an embodiment of the present disclosure.

FIG. 5 schematically shows an overall process in which the condensing type clothes dryer 100 predicts a freezing risk and performs a corresponding operation under the control of the control unit 420 of FIG. 4 according to an embodiment of the present disclosure. It is a process flow chart.

FIG. 6 is an example of a notification display displayed on a user terminal when the freezing risk prediction message generated by the control unit 420 of FIG. 4 is provided to the user terminal according to an embodiment of the present disclosure. there is.

7 is a flowchart illustrating a process of performing an operation in an anti-icing mode according to an embodiment of the present disclosure.

FIG. 8 shows each step in the process of performing the operation of the anti-icing mode according to FIG. 7 on a time table.

9 is a diagram showing a change in power consumption over time when an operation in an anti-icing mode is performed on the condensing type clothes dryer 100 according to an embodiment of the present disclosure.

FIG. 10 schematically shows a change in temperature of each part of the condensation type clothes dryer 100 over time at an initial stage when an operation in an anti-icing mode is performed on the condensation type clothes dryer 100 according to an embodiment of the present disclosure. it is a drawing

11 illustrates an operation in an anti-icing mode according to an embodiment of the present disclosure, when the heater and the compressor of the heat pump system are driven, and when only the compressor of the heat pump system is driven without the heater. At the beginning of execution, it is a diagram schematically showing the temperature change of each part of the clothes dryer over time.

Hereinafter, with reference to the drawings, embodiments of the present disclosure will be described in detail so that those skilled in the art can easily carry out the present disclosure. However, the present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar elements. Also, in the drawings and related descriptions, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

1 is an external perspective view of a condensing type clothes dryer 100 according to an embodiment of the present disclosure. FIG. 2 is a side cross-sectional view of the condensing type clothes dryer 100 shown in FIG. 1 .

As shown in FIGS. 1 and 2 , the condensation type clothes dryer 100 according to an embodiment of the present disclosure is rotatably disposed in the housing 110 forming the exterior and the housing 110 to dry objects inside. A drum 120 configured to accommodate the drum 120, a drum driving unit 130 for rotationally driving the drum 120, and an air circulation passage 140 guiding air discharged from the inside of the drum 120 to be introduced into the drum 120 again. ), and a heat pump system 150 that removes moisture from the air passing through the air circulation passage 140 and applies heat.

According to one embodiment of the present disclosure, the housing 110 may have a substantially hexahedral shape, but the present disclosure is not limited thereto. According to various embodiments of the present disclosure, the housing 110 may include a base plate 111 , a front cover 112 , a top cover 113 , and side/rear covers 114 . According to various embodiments of the present disclosure, the front cover 112 may include an opening (not shown) formed in the center, and a door 115 rotatably installed on the front cover 112 at a position corresponding to the opening. can include According to various embodiments of the present disclosure, the opening on the front cover 112 may be opened and closed by opening and closing the door 115 .

According to various embodiments of the present disclosure, on the top of the front cover 112 of the housing 110, the input unit 117 for receiving a control input from the user and various information related to the operation of the dryer 100 are displayed or the user A display 118 displaying a screen for guiding input of may be disposed. According to one embodiment of the present disclosure, as shown in FIG. 1, the input unit 117 includes a jog shuttle or dial type input unit 117a and a touch pad or key that can be gripped and rotated by a user. / may include at least one of the button-type input units 117b, and the present disclosure is not limited thereto. According to an embodiment of the present disclosure, an anti-icing mode selection and an operation start/stop command may be received from a user through the input unit 117 . According to one embodiment of the present disclosure, the display 118 is an LCD, LED, OLED, QLED. It may include various types of display panels such as Micro LED, and may be implemented as a touch screen by providing a touch pad on the front side, and the present disclosure is not limited to a specific type of display. According to various embodiments of the present disclosure, an operating state of the clothes dryer 100 and a user manipulation state may be displayed through the display 118 . According to various embodiments of the present disclosure, a message informing of an freezing risk and querying an operation in an anti-icing mode may be displayed through the display 118 .

According to one embodiment of the present disclosure, the temperature sensor 119 may be disposed near the display 118 on top of the front cover 112 of the housing 110 . According to an embodiment of the present disclosure, the temperature sensor 119 may detect the temperature of ambient air around the condensing type clothes dryer 110 and transmit the sensed temperature to a controller (see FIG. 4 ) to be described later. In this drawing and related description, the temperature sensor 119 for measuring the outside air temperature is shown and described as being disposed next to the display 118 at the top of the front cover 112 of the housing 110, but the present disclosure is limited thereto. it is not going to be According to another embodiment of the present disclosure, any other location suitable for measuring the outside air temperature, such as any location on the front cover 112, top cover 113, side/rear cover 114 of the housing 110 ), the temperature sensor 119 may be disposed.

According to various embodiments of the present disclosure, the drum 120 may have a cylindrical shape with front and rear surfaces open and horizontally arranged. According to various embodiments of the present disclosure, the front and rear surfaces of the drum 120 may be rotatably supported by a front panel 121 and a rear panel 122 fixed to the housing 110 . According to various embodiments of the present disclosure, in the center of the front panel 121, the opening 123 is formed at a position corresponding to the opening (not shown) and the door 115 on the front cover 112 described above. can According to various embodiments of the present disclosure, the opening of the front cover 112 and the opening 123 on the front panel 121 may be opened and closed together by opening and closing the door 115 described above. According to various embodiments of the present disclosure, when the opening on the front cover 112 and the opening 123 are opened, an object to be dried is put into the drum 120 and an object to be dried is taken out of the drum 120. can

According to various embodiments of the present disclosure, the exhaust port 124 may be formed on the lower side of the front panel 121 . According to various embodiments of the present disclosure, air may be discharged from the inside of the drum 120 to the outside through the exhaust port 124 . According to various embodiments of the present disclosure, a drum discharge temperature sensor 127 for measuring the temperature of air discharged from the inside of the drum 120 may be disposed near the exhaust port 124, but the present disclosure is not limited thereto. . In this drawing, the drum discharge temperature sensor 127 is illustrated as being disposed near the exhaust port 124 on the front duct 144 to be described later, but the present disclosure is not limited thereto. According to another embodiment of the present disclosure, the drum discharge temperature sensor 127 can measure the temperature of the air discharged from the drum 120, at any location close to the exhaust port 124 inside or outside the drum 120. can be placed in

According to various embodiments of the present disclosure, on the rear panel 122 supporting the rear surface of the drum 120, a hot air inlet 125 allowing hot dry air to flow into the drum 120 may be formed. . According to various embodiments of the present disclosure, hot dry air from an air circulation passage 140 to be described later may be introduced into the drum 120 through the hot air inlet 125 .

According to various embodiments of the present disclosure, the drum 120 may also include a plurality of lifters 126 protruding from the inner circumferential surface, as shown in FIG. 2 . According to various embodiments of the present disclosure, each of the lifters 126 installed on the inner circumferential surface of the drum 120 lifts an object to be dried while the drying process is in progress while the drum 120 rotates, so that the object to be dried rises and falls. By repeating this, it is possible to dry evenly on several sides of the object to be dried. According to various embodiments of the present disclosure, a roller 128 supporting the drum 120 to rotate smoothly may be provided on an outer circumferential surface of the drum 120, but the present disclosure is not limited thereto.

According to various embodiments of the present disclosure, the drum drive unit 130 is connected to the drive motor 131 disposed under the drum 120 inside the housing 110 and the drive motor 131, and the drive motor 131 ) It may include a driving pulley 132 that rotates by receiving power. According to various embodiments of the present disclosure, the drum driving unit 130 may also include a belt 133 that rotates the drum 120 while rotating by the rotation of the driving pulley 132 . According to various embodiments of the present disclosure, the belt 133 may be installed to surround the outer circumferential surface of the drive pulley 132 and the outer circumferential surface of the drum 120, and the drive pulley 132 is driven by the drive motor 131. While rotating, the drum 120 may be rotated. According to various embodiments of the present disclosure, the drum 120 may rotate clockwise and/or counterclockwise according to driving of the driving motor 131 .

According to various embodiments of the present disclosure, the air circulation passage 140 includes a blowing fan 141 disposed on the air circulation passage 140 and causing circulation of air through the air circulation passage 140 and a blowing fan ( 141) may include a blowing fan case 142 accommodating. According to various embodiments of the present disclosure, the air circulation passage 140 is a front duct 144 that connects between the exhaust port 124 on the front panel 121 side of the drum 120 and the blowing fan 141 and the blowing air. It may include a rear duct 145 connecting a downstream portion of the fan 141 to the hot air inlet 125 on the rear panel 122 of the drum 120 described above.

According to one embodiment of the present disclosure, as shown in FIG. 2, the blowing fan 141 is connected to the driving motor 131 for driving the drum 120 described above, and rotates the driving motor 131. It may be rotationally driven, and the present disclosure is not limited thereto. According to another embodiment of the present disclosure, a separate motor (not shown) for driving the blowing fan 141 may be further provided in the housing 110 . According to various embodiments of the present disclosure, the air from the inside of the drum 120 is discharged to the outside through the exhaust port 124 by the air flow generated by the rotation of the blowing fan 141, and the air circulation passage 140 ) and can be put back into the drum 120 through the hot air inlet 125.

According to various embodiments of the present disclosure, a filter 146 may be disposed in the front duct 144 of the air circulation passage 140 . According to one embodiment of the present disclosure, the filter 146 removes foreign substances contained in the air discharged from the inside of the drum 120 through the exhaust port 124, for example, dust or lint derived from the object to be dried inside the drum 120. can be filtered. According to various embodiments of the present disclosure, at least a part of the heat pump system 150 and a heater 146 may be disposed in the rear duct 145 of the air circulation passage 140 .

According to an embodiment of the present disclosure, the heat pump system 150 may dehumidify and heat circulating air on the above-described air circulation passage 140, particularly the rear duct 145, so that it is in a high temperature and dry state. . According to various embodiments of the present disclosure, the heat pump system 150 may include a compressor (156 in FIG. 3), a condenser 152, an expansion valve (158 in FIG. 3), and an evaporator 154, A refrigerant may sequentially circulate between each of these components. According to various embodiments of the present disclosure, some components of the heat pump system 150 , for example, the evaporator 154 and the condenser 152 may be accommodated on the air circulation passage 140 . According to various embodiments of the present disclosure, the humid air discharged from the inside of the drum 120 and introduced into the front duct 144 may be cooled through contact with the evaporator 154 on the air circulation passage 140, and cooled. In the process, moisture may be removed from the air to form condensate around the evaporator 154 . According to various embodiments of the present disclosure, air cooled through contact with the evaporator 154 may be heated through contact with the condenser 152 on the air circulation passage 140 and become a high temperature and dry state.

According to various embodiments of the present disclosure, the heater 146 is, as shown in FIG. 2 , downstream of the aforementioned heat pump system 150, particularly the evaporator 154 and condenser 152, on the rear duct 145. can be placed in According to various embodiments of the present disclosure, the heater 146 may additionally heat the air heated by the condenser 152 . According to various embodiments of the present disclosure, by assisting the condenser 152 and further heating the air by the heater 146 , the temperature of the air supplied to the drum 120 may be increased more quickly.

FIG. 3 is a diagram conceptually illustrating an air circulation path that circulates inside and outside the drum 120 of the condensing type clothes dryer 100 shown in FIG. 1 and a refrigerant circulation path of the heat pump system 150 . The air circulation path (indicated by a solid line) shown in FIG. 3 shows the movement of air between the drum 120 and the air circulation passage 140 described above with reference to FIG. 2 , for example. A refrigerant circulation path (indicated by a dotted line) shown in FIG. 3 shows movement of refrigerant between components of the heat pump system 150 described above with reference to FIG. 2 , for example.

According to various embodiments of the present disclosure, the compressor 156 may compress the gaseous refrigerant into a high-temperature and high-pressure state, and discharge the compressed high-temperature and high-pressure refrigerant. For example, according to one embodiment of the present disclosure, the compressor 156 may compress the refrigerant through a reciprocating motion of a piston or a rotational motion of a rotor, but the present disclosure is not limited thereto. According to various embodiments of the present disclosure, the refrigerant discharged from the compressor 156 may pass through the refrigerant temperature sensor 159 and the temperature may be measured by the refrigerant temperature sensor 159 . According to various embodiments of the present disclosure, the refrigerant discharged from the compressor 156 may be delivered to the condenser 152 . According to various embodiments of the present disclosure, the condenser 152 may discharge heat to surroundings while condensing the compressed gaseous refrigerant into a liquid. According to various embodiments of the present disclosure, the liquid refrigerant condensed in the condenser 152 may be delivered to the expansion valve 158 . According to various embodiments of the present disclosure, the expansion valve 158 may expand the high-temperature and high-pressure liquid refrigerant condensed in the condenser 152 into a low-pressure liquid refrigerant. According to various embodiments of the present disclosure, the evaporator 154 may evaporate the liquid refrigerant expanded through the expansion valve 158, and the resulting low-temperature, low-pressure gaseous refrigerant may be returned to the compressor 156. . According to various embodiments of the present disclosure, the evaporator 154 may absorb heat from the surroundings through an evaporation process that changes a low-pressure liquid refrigerant into a gaseous refrigerant. In short, as shown in FIG. 3 , in the heat pump system 150 , the refrigerant may circulate in the order of the compressor 156 , the condenser 152 , the expansion valve 158 , and the evaporator 154 .

According to various embodiments of the present disclosure, as described above, humid air may be discharged from the drum 120 (eg, through the exhaust vent 124 shown in FIG. 2 ). According to various embodiments of the present disclosure, the humid air discharged from the drum 120 passes through the blowing fan 141, as shown in FIG. 3, and then the evaporator 154 of the heat pump system 150 can be contacted with According to various embodiments of the present disclosure, the evaporator 154, as described above, may absorb heat from the surroundings through the evaporation process of the refrigerant and cool the surrounding air. Accordingly, when the air around the evaporator 154 is cooled and the temperature is lowered below the dew point, moisture contained in the air may be condensed on the surface of the evaporator 154, thereby removing the moisture from the air. According to various embodiments of the present disclosure, water (condensed water) condensed on the surface of the evaporator 154 may be collected by a water trap (not shown) provided below the evaporator 154 . The water collected in the water trap may move to a separate storage, for example, a pump room, and be drained to the outside of the condensing type clothes dryer 100.

According to various embodiments of the present disclosure, air dehumidified and cooled through contact with the evaporator 154 may be heated through contact with the condenser 152 as described above. According to various embodiments of the present disclosure, as described above, the condenser 152 may emit heat in the process of condensing the compressed gaseous refrigerant into a liquid, and ambient air may be heated by the emitted heat. According to various embodiments of the present disclosure, as shown in FIG. 3 , air heated through the condenser 152 moves toward the drum 120 and may be further heated by the heater 146 . According to various embodiments of the present disclosure, as described above, air that has been dehumidified and heated to a high-temperature dry state via the evaporator 154, the condenser 152, and the heater 146 of the heat pump system 150 The hot air may be introduced into the drum 120 again (through the hot air inlet 125 of FIG. 2 ), and the object to be dried inside the drum 120 may be dried.

FIG. 4 is a functional block diagram schematically illustrating an operation function of the clothes dryer 100 of FIG. 1 according to an embodiment of the present disclosure. In this drawing and related description, for convenience of description, only the configuration necessary for understanding the operation function according to an embodiment of the present disclosure will be focused, and description of various other functions will be omitted. According to an embodiment of the present disclosure, as shown in FIG. 4 , the condensing type clothes dryer 100 includes a temperature sensor 119 for measuring the temperature of the outside air surrounding the dryer 100 and a control command received from the user. An input unit 117, a communication unit 410 that supports communication with an external user terminal and/or an external data server through an external communication network through a wired/wireless method, and drives rotation of the drum 120 and the blowing fan 141. The drive motor 131, the compressor 156 of the heat pump system 150, the refrigerant temperature sensor 159 for measuring the temperature of the refrigerant discharged from the compressor 156, and the rear duct 145 of the air circulation passage 140 A heater 146 disposed to heat air to be supplied into the drum 120, a controller 420 that controls the overall operation of each component of the condensation type clothes dryer 100, and control of the condensation type clothes dryer 100 It may include a control table 430 for storing various types of information necessary for the laundry, and a display 118 for displaying information on various states of the clothes dryer 100.

According to an embodiment of the present disclosure, the temperature sensor 119 may measure the temperature of the outside air surrounding the clothes dryer 100 . According to one embodiment of the present disclosure, the temperature sensor 119, as described above with reference to FIG. The disclosure is not limited thereto. According to another embodiment of the present disclosure, it can be placed in any suitable location for measuring the ambient temperature. According to an embodiment of the present disclosure, the temperature measured by the temperature sensor 119 may be continuously transmitted to the controller 420 to be described later.

According to an embodiment of the present disclosure, the input unit 117 may receive various inputs/commands from a user. According to an embodiment of the present disclosure, the input unit 117 may receive a selection of an operation mode of the clothes dryer 100, for example, an anti-icing mode or a drying mode, from a user. According to an embodiment of the present disclosure, the input unit 117 may receive a start and/or stop command of an operation according to a selected mode from a user.

According to various embodiments of the present disclosure, the communication unit 410 may support communication with various types of external devices, for example, a pre-designated user terminal or an external data server, through an external communication network according to various types of wired/wireless communication protocols. According to an embodiment of the present disclosure, the communication unit 410 may support any short-range wireless communication protocol, such as Bluetooth, Wireless LAN (WLAN), ZigBee, or Z-Wave. According to an embodiment of the present disclosure, the communication unit 410 may support any communication protocol such as TCP/IP, UDP, HTTP, HTTPS, FTP, SFTP, or MQTT. According to an embodiment of the present disclosure, the communication unit 410 may also support any wireless communication protocol such as GSM, CDMA, WCDMA, WiMAX, LTE, LTE-A, 5G, or 6G. According to an embodiment of the present disclosure, the communication unit 410 may receive information about a temperature change related to a location of the condensing type clothes dryer 100 from an external data server according to an arbitrary wired/wireless communication protocol. According to an embodiment of the present disclosure, the communication unit 410 may transmit a message informing that a risk of freezing has occurred to an external user terminal according to an arbitrary wired/wireless communication protocol. According to an embodiment of the present disclosure, the communication unit 410 may receive an operation command according to an anti-icing mode from an external user terminal according to an arbitrary wired/wireless communication protocol.

According to various embodiments of the present disclosure, the drive motor 131 may rotate clockwise and/or counterclockwise according to a control signal from the control unit 420 to be described later. According to one embodiment of the present disclosure, as described above with reference to FIG. 1, the rotation of the driving motor 131 is driven by the drum 120 through the driving pulley 132 and the belt 133 of the drum driving unit 130. can be rotated. According to one embodiment of the present disclosure, the driving motor 131 may also be connected to the blowing fan 141 to rotate the blowing fan 141, but the present disclosure is not limited thereto.

According to various embodiments of the present disclosure, the compressor 156 may operate according to a predetermined operating frequency under the control of a controller 420 to be described later. According to various embodiments of the present disclosure, as described above, the compressor 156 may compress the gaseous refrigerant into a high-temperature and high-pressure state and then discharge the refrigerant. According to various embodiments of the present disclosure, as the operating frequency of the compressor 156 increases, the temperature of the refrigerant discharged from the compressor 156 may increase. According to various embodiments of the present disclosure, the temperature of the refrigerant discharged from the compressor 156 may be measured by the refrigerant temperature sensor 159 . According to an embodiment of the present disclosure, as will be described later, when the clothes dryer 100 operates in the anti-icing mode, the control unit 420 considers the measured value of the refrigerant temperature sensor 159 to operate the compressor 156. The driving frequency can be adjusted.

According to one embodiment of the present disclosure, the heater 146, as described above with reference to FIG. 1, is disposed in the rear duct 145 of the air circulation passage 140 to supply air to the inside of the drum 120. can be heated According to one embodiment of the present disclosure, the heater 146 is, as described above with respect to FIG. 1, the downstream side of the heat pump system 150 on the rear duct 145 (eg, the evaporator on the rear duct 145). 154 and downstream of the condenser 152) and the present disclosure is not limited thereto. According to one embodiment of the present disclosure, the heater 146 may include one or more coil heaters, and the temperature of air supplied into the drum 120 may be controlled by on/off control of the heater. According to one embodiment of the present disclosure, as described above, when the clothes dryer 100 operates in the anti-icing mode, the on/off control of the heater 146 may be performed according to the measured value of the refrigerant temperature sensor 159. there is.

According to various embodiments of the present disclosure, the controller 420 may monitor a temperature value (surrounding temperature) related to the condensing type clothes dryer 100 and continuously determine whether a risk of freezing occurs. According to an embodiment of the present disclosure, the control unit 420 continuously records the temperature measured by the temperature sensor 119 and/or the related temperature from an external data server (eg, weather server) through the communication unit 410. It can be obtained, and it can be determined whether the obtained temperature meets the freezing risk requirements. According to an embodiment of the present disclosure, the control unit 420 may continuously monitor and determine, for example, whether the obtained temperature is maintained below a threshold value for a predetermined time or longer. According to an embodiment of the present disclosure, the controller 420 may generate a message informing of this when it is determined that the freezing risk requirement is satisfied. According to one embodiment of the present disclosure, the controller 420 may transmit a message informing of the risk of freezing to the display 118 . According to an embodiment of the present disclosure, the controller 420 may transmit a message informing of the risk of freezing to a predetermined external user terminal through the communication unit 410 .

According to various embodiments of the present disclosure, the control unit 420 may receive various inputs or commands from a user received on the input unit 117 from the above-described input unit 117 . According to an embodiment of the present disclosure, the controller 420 may also receive various inputs or commands transmitted from an external user terminal through the communication unit 410 described above. According to an embodiment of the present disclosure, the controller 420 may receive a selection of an anti-icing mode by a user from the input unit 117 or the communication unit 410 . According to an embodiment of the present disclosure, the controller 420 may receive an operation start and/or stop command from a user through the input unit 117 or the communication unit 410 .

According to an embodiment of the present disclosure, the control unit 420 may initiate an operation according to the anti-icing mode when receiving an anti-icing mode selection and operation start command through the input unit 117 or the communication unit 410. there is. According to an embodiment of the present disclosure, the control unit 420 may provide, for example, various control information to be used when operating in the anti-icing mode from the control table 430, for example, operating specifications for each condition of the compressor 156 and/or the heater 146. can be obtained. According to an embodiment of the present disclosure, the control unit 420 continuously receives and monitors the temperature measurement value of the refrigerant discharged by the compressor 156 from the refrigerant temperature sensor 159 after the operation in the anti-icing mode is started. can do. According to an embodiment of the present disclosure, the control unit 420 controls the driving motor 131 and the compressor 156 based on the control information obtained from the control table 430 and the refrigerant temperature obtained from the refrigerant temperature sensor 159. ), and/or by controlling the operation of the heater 146, the operation of the anti-icing mode may proceed.

First, at step 502, the control unit 420 may determine whether a freezing risk requirement has been met. According to an embodiment of the present disclosure, the control unit 420 may acquire the continuously measured temperature value from the temperature sensor 119 and compare the received temperature value with a reference value to determine whether the freezing risk requirement is met. can do. According to an embodiment of the present disclosure, the control unit 420 continuously obtains a temperature value from the outside (eg, an external data server) through the communication unit 410 and compares the received temperature value with a reference value to meet the freezing risk requirement. It can be determined whether this is satisfied. According to an embodiment of the present disclosure, when the temperature obtained over a predetermined period of time (eg, 10 seconds or more) is maintained at a reference value (eg, 2 degrees Celsius) or less, it is determined that the freezing risk requirement is met. Yes, and the present disclosure is not limited thereto.

If it is determined at step 502 that the freezing risk requirement is met, the process may proceed to step 504. In step 504, the controller 420 may generate a message notifying that the risk of freezing has occurred and inquiring about whether to perform an operation in the anti-icing mode. According to an embodiment of the present disclosure, the controller 420 may control the generated message to be displayed through the display 118 . According to another embodiment of the present disclosure, the control unit 420 may transmit the generated message to a pre-registered user terminal through the communication unit 430 .

In this regard, in FIG. 6 , according to an embodiment of the present disclosure, when the freezing risk prediction message generated by the control unit 420 of FIG. 4 is provided to the display 118 or a user terminal (not shown), the display 118 or an example of displaying a message displayed on a user terminal is shown. Referring to FIG. 6, on the left side, a temperature change over time surrounding the condensing type clothes dryer 100 is displayed as a graph 602, and a message 604 informing that there is a risk of freezing is displayed at the top of the graph 602. indicated. In addition, on the right side of FIG. 6, a guide 606 related to a method for operating the condensing type clothes dryer 100 in an anti-icing mode is displayed at the top. According to the drawing, for example, a guide for turning on the power, entering a function menu, and selecting anti-icing is displayed. In FIG. 6 , a method of starting an operation in the anti-icing mode through the input unit 117 in the clothes dryer 100 itself is provided, but the present disclosure is not limited thereto. According to another embodiment of the present disclosure, the guide display provided through the display 118 of the condensing type clothes dryer 100 is to operate the input unit 117 of the clothes dryer 100 as shown in the guide 606 of FIG. In contrast, the guide display provided through the user terminal allows the dryer 100 to enter the anti-icing mode operation by inputting a remote control command on the user terminal. It may include a method of inputting a control command, and the present disclosure is not limited to a specific case. Meanwhile, in the lower right corner of FIG. 6 , a simple guide 608 related to driving performed when an operation according to the anti-icing mode is started is displayed. As shown, it is guided that operation for a predetermined time (minute B) and stop for a predetermined time (minute C) will be repeatedly performed for 16 hours and then released, which is merely an example and the present disclosure is not limited thereto. no. According to an embodiment of the present disclosure, the operation time B minutes may be shorter than the stop time C minutes, and the present disclosure is not limited thereto. The example shown in FIG. 6 is only an example, and the present disclosure is not limited thereto.

On the other hand, although not shown in FIG. 6, according to an embodiment of the present disclosure, in providing a guide on how to operate in an anti-icing mode, a phrase guiding emptying the inside of the drum 120 and starting the drum 120 may be provided together. can According to an embodiment of the present disclosure, in the condensing type clothes dryer 100, when the operation in the anti-icing mode is performed in a state in which an object to be dried is contained in the drum 120 and the water level sensor is detected, (normal drying Unlike entering the drainage check mode during mode operation), a message informing that the object to be dried from the drum 120 is to be removed can be provided to the user terminal through the display 118 or the communication unit 410, and the present disclosure is thereby It is not limited.

Returning to FIG. 5 , in step 506 , the control unit 420 may determine whether an operation initiation command to an anti-icing mode (eg, an anti-icing mode selection and operation initiation command) has been received from the user. According to an embodiment of the present disclosure, a user's command to select an anti-icing mode and start an operation may be received through the input unit 117 of the housing 110 . According to another embodiment of the present disclosure, a command for selecting an anti-icing mode and starting an operation from a user may be received from a user terminal through the communication unit 410 . In general, in order to control the operation of the clothes dryer according to the remote control, it is often required that the remote control setting be enabled on the dryer. According to an embodiment of the present disclosure, in the case of an anti-icing mode selection and an operation start command, remote control from a user terminal may be allowed regardless of whether the remote control setting on the condensing type clothes dryer 100 is enabled. However, the present disclosure is not limited thereto. In step 506, when it is determined that an operation start command to an anti-icing mode has been received from the user, the process proceeds to step 508, where the controller 420 controls each part of the dryer 100, for example, the drive motor 131 ), the heat pump system 150, and/or the heater 146 may be operated to operate in the anti-icing mode.

FIG. 7 is a flowchart illustrating a process of performing an operation in an anti-icing mode under the control of the control unit 420 in step 508 of FIG. 5 in more detail.

When the operation of the anti-icing mode is initiated, firstly, in step 702, the controller 420 enters the compressor operation preparation step, starts driving the drive motor 131 and for a predetermined time (eg, A minute) can wait During this time, the blowing fan 141 is driven by the driving motor 131, and the compressor 156 (and the heater 146) of the heat pump system 150 can prepare for subsequent operation in a stopped state. there is. In step 704, it is determined whether a predetermined period of time (e.g., minute A) has elapsed, and if the predetermined period of time has elapsed, the procedure proceeds to step 706, where the heating operation step may begin.

In step 706, the controller 420 may first check the outside air temperature. According to an embodiment of the present disclosure, the controller 420 may check the external air temperature at that time, for example, from the temperature sensor 119 described above. According to another embodiment of the present disclosure, the control unit 420 may check the external air temperature at that time, for example, by measuring the temperature of another temperature sensor (eg, the drum discharge temperature sensor 127) installed on the clothes dryer 100. there is.

Then, in step 708, the control unit 420 may obtain compressor operation specifications and heater operation specifications from the control table 430 based on the temperature checked in step 706. Although not shown, according to an embodiment of the present disclosure, a plurality of sections for outdoor temperature are divided in the control table 430, and for each section, an initial operating frequency for the compressor 156 and/or discharge A refrigerant target temperature may be defined. According to an embodiment of the present disclosure, the lower the temperature, the higher the initial operating frequency of the compressor 156 and the higher the discharged refrigerant target temperature may be defined, but the present disclosure is not limited thereto. Although not shown, according to an embodiment of the present disclosure, a plurality of sections for outdoor temperature are divided in the control table 430, and for each section, turn-on and turn-off conditions for the heater 146 ( For example, a refrigerant discharge temperature condition for turning on the heater 146 and a refrigerant discharge temperature condition for turning off the heater 146) may be defined. According to one embodiment of the present disclosure, the turn-off condition of the heater 146 is set constant regardless of the section to which the outside air temperature belongs, and the turn-on condition may be defined as a higher temperature as the temperature decreases. It is not limited thereto. According to an embodiment of the present disclosure, the control unit 420, from the control table 430, as compressor operation specifications, the number of compressors 156 defined corresponding to the section to which the outdoor temperature identified in step 706 belongs. An initial operating frequency and/or a discharged refrigerant target temperature may be obtained. According to an embodiment of the present disclosure, the control unit 420, as a heater operation specification, from the control table 430, the turn of the heater 456 defined corresponding to the section to which the outdoor temperature checked in step 706 belongs. Conditions for on and turn off can be obtained.

Then, in step 710, the controller 420 operates the compressor 156 and the heater for a predetermined period of time (eg, B minutes) based on the compressor operating specifications and heater operating specifications obtained in step 708. (146) Each can be controlled to be driven. According to one embodiment of the present disclosure, the control unit 420 causes the compressor 156 to start operating according to the compressor operating specifications obtained in step 708, for example, at the obtained initial operating frequency, and from the compressor 156 After the temperature of the discharged refrigerant reaches the obtained discharged refrigerant target temperature, the operation of the compressor 156 may be controlled while adjusting the operating frequency of the compressor 156 so that the temperature is maintained. Therefore, according to an embodiment of the present disclosure, in each heating operation step, the first section in which the compressor 156 is driven at the initial operating frequency of the compressor operation specification, and the refrigerant discharge temperature as a result of driving the first section are targeted. After it rises to , there may be a second period in which the compressor 156 is driven at a frequency adjusted to maintain the elevated temperature. According to an embodiment of the present disclosure, the controller 420 first turns on the heater 146 according to the heater operation specification obtained in step 708, and then controls the temperature of the refrigerant discharged from the compressor 156. It is possible to control the operation of the heater 146 by turning it off when it reaches the obtained turn-off condition and turning it on when it reaches the turn-on condition again. According to one embodiment of the present disclosure, the heater 146 may be continuously turned on/off according to temperature change while the heating operation step is continued.

In step 712, it is determined whether a set time (eg, B minutes) has elapsed, and if so, the procedure proceeds to step 714, where a heating stop step may be entered. In step 714, the controller 420 may wait for a predetermined time (eg, C minutes) while stopping all of the driving motor 131, the compressor 156, and the heater 146. In step 716, it is determined whether a predetermined amount of time (eg, C minutes) has elapsed, and if so, the procedure may proceed to step 718. According to an embodiment of the present disclosure, as will be described later, the heating operation step from step 706 to step 712 and the heating stop step from step 714 to step 716 are performed a plurality of times (eg, D times) may be repeated, but only in the final round, the duration of the heating stop step may be set slightly shorter than other rounds (eg, C-3 minutes), and the present disclosure is not limited thereto.

In step 718, the heating operation step from step 706 to step 712 described above and the heating stop step from step 714 to step 716 are performed a predetermined plurality of times (eg, D times). It can be determined whether it has been repeated. At step 718, if it is determined that it has not yet been repeated for the set number of rounds, the procedure may return to step 706. In step 718, if it is determined that the iterations for the predetermined number of rounds have been completed, the process may proceed to step 720 to enter a cooling phase for a predetermined time (eg, E minutes). In the cooling step of step 720, the control unit 420 drives only the drive motor 131 for a predetermined time while the compressor 156 and the heater 146 are stopped (and accordingly, the blower fan is driven) to dry the dryer ( 100) It is possible to cool the internal components.

In this disclosure, with respect to FIG. 7 , the heating operation step is described as being performed from step 706 to step 712 . That is, in the present disclosure, after the compressor operation preparation step of

steps

702 and 704 is finished, the control unit 420 checks the outside air temperature every time the heating operation step is entered (step 706) and obtaining corresponding operating specifications (step 708), and controlling driving of the compressor 156 and the heater 146 for a predetermined time according to the acquired specifications (steps 710 to 712). However, the present disclosure is not so limited. According to another embodiment of the present disclosure, at the beginning of the entire process of performing the operation in the anti-icing mode (eg, the compressor operation preparation step (before or after steps 702 to 704), the external air temperature is checked and the corresponding operation specification For example, according to another embodiment of the present disclosure, the heating operation step may be defined as including only the above-described

steps

710 and 712, and after step 718 ( If the operation is not completed for the predetermined number of rounds), the procedure may return to step 710 rather than step 706, and the present disclosure is not limited in any particular form.

FIG. 8 shows each step of the process of performing the anti-icing mode operation according to FIG. 7 on a time table.

As shown in FIG. 8 , after the operation starts at time T0, a compressor operation preparation step (eg, driving only the driving motor 131) may be first performed for minute A (eg, 2 minutes). Then, at time T1 (minute T0 + A), the first heating step may be performed. As shown, the first heating step is a heating operation step for B minutes (eg driving the driving motor 131, the compressor 156, and the heater 146) followed by a heating stop step for C minutes (eg, The driving motor 131, the compressor 156, and the heater 146 are all stopped). Then, immediately following, a second heating step may be performed. As shown, the second heating step may include a heating operation step for B minutes and a subsequent heating stop step for C minutes, similarly to the first heating step. As shown in FIG. 8, the heating step may be repeated D times. As described above with reference to FIG. 7, only the heating stop step of the heating step of the final D round is performed for a short time of C-3 minutes. can Then, the heating step is finished, and at time T2 (T0 + A min + ((B min + C min) * D times - 3 min)), a cooling step for E min (e.g., 1 min) may be performed. there is.

9 is a diagram showing a change in power consumption over time when an operation in an anti-icing mode is performed on the condensing type clothes dryer 100 according to an embodiment of the present disclosure. 9 shows a change in power consumption when, for example, the heating step in the anti-icing mode is repeated 8 times, but the present disclosure is not limited thereto. As shown in FIG. 9 , it can be seen that power consumption changes in a similar pattern at every heating step. As shown, for example, at the beginning of each heating step (specifically, at the beginning of the heating operation step), since the drive motor 131, the compressor 156, and the heater 146 are all driven, it can be seen that the power consumption is relatively high. there is. Then, after the refrigerant discharge temperature reaches a predetermined temperature, the operating frequency of the compressor 156 is adjusted and/or the heater 146 is turned off, power consumption is relatively reduced during the remaining heating operation phase, and then the heating stop phase is entered. When the driving motor 131, the compressor 156, and the heater 146 are all stopped, it can be seen that the power consumption has dropped to zero. As shown in FIG. 9 , it can be seen that after all eight heating steps have been performed and a slight power consumption is generated due to driving of the driving motor 131 during the last cooling step, the procedure ends. As shown in FIG. 9 , since power is not consumed during the heating stop step, for example, the total amount of power consumption according to the operation of the anti-icing mode for preventing freezing of the condensing type clothes dryer 100 may not increase excessively. .

FIG. 10 schematically shows a change in temperature of each part of the condensation type clothes dryer 100 over time at an initial stage when an operation in an anti-icing mode is performed on the condensation type clothes dryer 100 according to an embodiment of the present disclosure. it is a drawing Specifically, FIG. 10 shows exemplary temperature changes over time of each part of the clothes dryer 100, specifically, the inside of the dryer, the floor of the pump room, and the pump room, in relation to the operation in the anti-icing mode.

As shown in FIG. 10 , it can be seen that when the heating operation step in the anti-icing mode starts at time T1, the temperature of the inside of the dryer, the bottom of the pump room, and the pump room all rise rapidly. Then, after reaching a predetermined temperature, the temperature gradually decreases, and then, when the next heating operation step is started again, it can be seen that the temperature of the inside of the dryer, the bottom of the pump room, and the pump room all rise rapidly. As shown in FIG. 10 , while the anti-icing mode operation is performed, the temperature of each part of the clothes dryer 100 may repeatedly rise and fall to maintain a temperature higher than a temperature at which freezing may occur.

11 illustrates an operation in an anti-icing mode according to an embodiment of the present disclosure, performed by driving a heater and a compressor of a heat pump system (hybrid method) and by driving only a compressor of a heat pump system without a heater. (Heat pump method), it is a diagram schematically showing the temperature change of each part of the clothes dryer over time at the beginning of the operation. In (a) of FIG. 11, exemplary temperature changes of each part of the clothes dryer 100, specifically, the inside of the dryer, the floor of the pump room, and the pump room, in the hybrid method, that is, when the heater and the compressor of the heat pump system are used together. is shown In (b) of FIG. 11, in the heat pump method, that is, when only the compressor of the heat pump system is used without a heater, exemplary temperature changes of each part of the clothes dryer 100, specifically, the inside of the dryer, the bottom of the pump room, and the pump room is shown. Comparing the results shown in (a) and (b) of FIG. 11 , it can be seen that the temperature of each part of the dryer increases more quickly in the hybrid method. Therefore, when performing the operation in the anti-icing mode, when the heat pump system and the heater are used together as shown in (a) of FIG. 11, the duration of the heating operation step can be reduced compared to the case of (b) of FIG. 11 Therefore, it is possible to create a pleasant living environment by minimizing the time of noise generation.

Terms used in the present disclosure are used only to describe specific embodiments and are not intended to limit the present disclosure. For example, a component expressed in the singular number should be understood as a concept including a plurality of components unless the context clearly means only the singular number. As used herein, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and " Each of the phrases such as “at least one of A, B, or C” may include any one of the items listed together in that phrase, or all possible combinations thereof. It should be understood that the term 'and/or' as used in this disclosure encompasses any and all possible combinations of one or more of the listed items. Terms such as 'include,' 'have,' and 'consist of' used in this disclosure are only intended to designate that the features, components, parts, or combinations thereof described in this disclosure exist, and the use of these terms is not intended to exclude the possibility of the presence or addition of one or more other features, components, parts or combinations thereof. Expressions such as 'first' and 'second' used in the present disclosure may modify various elements regardless of order and/or importance, and are used only to distinguish one element from another element. components are not limited.

The expression 'configured to' used in the present disclosure may be used depending on the situation, for example, 'suitable for,' 'having the ability to,' 'designed to,' 'modified to,' "made to ,' or 'capable of', etc. The term 'configured to' may not necessarily mean only 'specially designed' in terms of hardware. Instead, in some situations, 'configured to The expression 'a device' can mean that the device 'is capable of' in conjunction with other devices or parts, for example 'a device configured (or configured) to perform the phrases A, B, and C'. may be a dedicated device for performing the corresponding operation, or may mean a general-purpose device capable of performing various operations including the corresponding operation.

The terms "~unit" or "~module" used in various embodiments of this document may include a unit implemented as hardware, software, or firmware, and may include, for example, logic, logic blocks, components, or circuits. The same terms can be used interchangeably. "~unit" or "~module" may be an integrally constituted component or a minimum unit or part of the component that performs one or more functions. For example, according to one embodiment, “~ unit” or “~ module” may be implemented in the form of an application-specific integrated circuit (ASIC).

According to various embodiments, each component (eg, module or program) of the above-described components may include a single object or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. there is. According to various embodiments, one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. . According to various embodiments, the actions performed by a module, program, or other component are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the actions are executed in a different order, or omitted. or one or more other actions may be added.

Although the foregoing description in the present disclosure has been made based on specific embodiments, it is understood that the present disclosure is not limited to such specific embodiments, and covers various modifications, equivalents, and/or substitutes of various embodiments. It should be.

Claims

a temperature acquisition unit that obtains a temperature value;

a drum configured to receive an object to be dried;

A passage for guiding the air discharged from the inside of the drum to the outside to be put back into the drum;

A heat pump system configured to heat air introduced into the drum and including a compressor, a condenser, an expansion valve, and an evaporator in which a refrigerant circulates, and

including a control unit;

Wherein the control unit, in response to receiving an operation command from a user to an anti-icing mode, controls a heating operation in which the compressor is driven for a first time and then stopped for a second time is repeatedly performed a plurality of times, clothes dryer.
According to claim 1,

In relation to the operation in the anti-icing mode, further comprising a control table including an operating frequency for the compressor, defined for each temperature,

The control unit, in response to receiving an operation command to the anti-icing mode, obtains a corresponding operating frequency from the control table based on the temperature value obtained by the temperature obtaining unit;

The clothes dryer of claim 1 , wherein the driving of the compressor for the first time includes driving the compressor according to the obtained operating frequency.
According to claim 2,

Further comprising a refrigerant temperature sensor for acquiring the temperature of the refrigerant discharged from the compressor,

The control table further includes a target temperature of the refrigerant, defined for each temperature,

The compressor is driven for the first time,

The compressor is driven according to the obtained operating frequency until the temperature of the refrigerant obtained by the refrigerant temperature sensor reaches the target temperature,

and, after the temperature of the refrigerant obtained by the refrigerant temperature sensor reaches the target temperature, the compressor is driven according to an operating frequency adjusted so that the temperature of the refrigerant is maintained at the target temperature. .
According to claim 1,

Further comprising a heater installed on the flow path,

In relation to the operation in the anti-icing mode, a control table including turn-on/off conditions of the heater defined for each temperature is further included,

The control unit, in response to receiving an operation command to the anti-icing mode, obtains the turn on/off condition of the corresponding heater from the control table based on the temperature value obtained by the temperature acquisition unit;

and repeatedly turning on/off the heater according to the obtained turn-on/off condition while the compressor is driven for the first time.
According to claim 4,

Further comprising a refrigerant temperature sensor for acquiring the temperature of the refrigerant discharged from the compressor,

A turn on/off condition of the heater is determined based on the temperature of the refrigerant discharged from the compressor.
According to claim 1,

The first time period is shorter than the second time period.
According to claim 1,

Wherein the control unit, in response to receiving an operation command from the user to an anti-icing mode, controls to perform a preparation operation in which the compressor is turned off and waits for a predetermined time prior to starting the heating operation, the clothes dryer .
According to claim 7,

Further comprising a blowing fan causing movement of the air on the flow path,

The controller controls the blowing fan to be driven while the preparation operation is performed.
According to claim 1,

Further comprising a blowing fan causing movement of the air on the flow path,

Wherein the control unit controls the blower fan to be driven while the compressor and the heater are turned off for a predetermined time after the heating operation is performed the plurality of times.
According to claim 1,

Wherein the control unit monitors the temperature value obtained by the temperature acquisition unit, and generates a message informing that there is a risk of freezing when it is determined that there is a risk of freezing as a result of the monitoring.
According to claim 10,

The temperature acquisition unit includes at least one of a temperature sensor installed in the clothes dryer and a communication unit that obtains the temperature value from an external server through a communication network.
According to claim 10,

The message includes an inquiry about whether to operate in an anti-icing mode, the clothes dryer.
According to claim 10,

A display outputting information for the user, and

Further comprising an input unit configured to receive an input from the user,

wherein the control unit displays the message through the display and receives an operation command to the anti-icing mode from the user through the input unit in response to the display of the message.
According to claim 10,

Further comprising a communication unit configured to communicate with a pre-registered user terminal through a communication network,

Wherein the control unit causes the message to be transmitted to the user terminal through the communication unit, and receives an operation command to the anti-icing mode from the user terminal through the communication unit.
As an anti-icing driving method for a clothes dryer,

The clothes dryer includes a temperature sensor, a drum, a blower fan that circulates air in and out of the drum, a motor that rotates and drives the blower fan, a heat pump including a compressor, and a heater that heats air supplied to the drum. include,

The method,

A first operation of driving the motor, the compressor, and the heater for a first time based on an operation specification determined according to the temperature measured by the temperature sensor, and stopping the motor, the compressor, and the heater for a second time A heating operation of repeating the second operation of doing a plurality of times, and

and a cooling operation of driving the motor while stopping the compressor and the heater for a third time period.