Laundry treatment apparatus

Abstract

Provided is a laundry treatment apparatus which measures the temperature during a laundry treatment process and in which control is performed according thereto. A laundry treatment apparatus according to one aspect of the present invention comprises: a heat source unit for generating thermal energy; a drum which is rotatably installed to accommodate laundry and of which the temperature changes by means of thermal energy generated from the heat source unit; a sensor module including a power generation unit attached to the outer circumferential surface of the drum to receive the thermal energy of the drum through a first end unit, having a second end unit coming in contact with air or water outside the drum, and generating electrical energy by the temperature difference between the first end unit and the second end unit, a drum sensing unit electrically coupled to the power generation unit to receive the electrical energy generated by the power generation unit and sense the temperature of the drum, and a communication unit electrically coupled to the power generation unit and the drum sensing unit and transmitting temperature data of the drum sensed by the drum sensing unit; and a control unit which receives the temperature data transmitted from the communication unit and controls the heat source unit.

Description

Laundry treatment equipment

[0001] The present invention relates to a laundry treatment device, and more particularly, to a laundry treatment device that measures the temperature during the treatment process of laundry and performs control accordingly.

[0002] Generally, laundry treatment devices apply physical and chemical processes to laundry. These devices include washing machines, which remove contaminants from laundry, dehydrators, which spin laundry at high speeds in a drum containing laundry to dehydrate it, and drying machines, which blast hot air into the drum to dry wet laundry.

[0003] In this regard, recently emerging laundry treatment devices are not limited to performing washing, dehydration, and drying functions individually in each device, but are configured to perform all of the above functions together in a single laundry treatment device.

[0004] Accordingly, when handling laundry, a series of processes such as washing course, rinsing course, spin-drying course, and drying course can be appropriately controlled through user operation or automatic control.

[0005] Meanwhile, a laundry treatment device can treat laundry by applying heat energy to a drum containing laundry, but in this case, it is necessary to measure the temperature during the treatment process to ensure the quality of the laundry being treated.

[0006] In this case, due to the nature of the drum that receives and rotates laundry, it may be difficult to measure the temperature more directly and accurately because it is not easy to supply power to the sensor for measuring temperature even if it is installed in the drum.

[0007] In relation to the laundry treatment device as described above, Korean Patent Publication No. 10-2022-0048531 (hereinafter referred to as “Prior Art 1”) discloses a sensor device and an electronic device such as a washing machine or dryer that obtains information from the sensor device.

[0008] Specifically, the sensor device is configured to generate electrical energy by converting energy generated by the operation of an electronic device into electrical energy, and to measure various data on laundry by being driven by such electrical energy.

[0009] In the case of the laundry treatment device of this prior art document 1, a structure is proposed that secures power through an energy harvester and drives a sensor without a separate external power supply.

[0010] However, in the case of this structure, since the sensor device is located between the laundry, there is no temperature difference to secure electromotive force between the medium heated together in the drum and the sensor device, and therefore there is a problem in that electric energy cannot be effectively generated from the energy harvester including the thermoelectric element.

[0011] And, Chinese Patent Publication No. 10-2018-0027043 (hereinafter referred to as “Prior Document 2”) discloses a washing machine and a control method thereof.

[0012] Specifically, a temperature measuring element installed to measure the water temperature of the inner tube, a power supply element configured to supply power to the temperature measuring element and the communication element by wireless charging, and a configuration configured to transmit data measured by the temperature measuring element to a control device by wireless communication are disclosed.

[0013] In the case of the laundry treatment device of this prior art document 2, power is supplied to the temperature measuring element placed in the inner cylinder by wireless charging, so a structure is proposed in which a separate cable is not installed between the inner cylinder and the outer cylinder, thereby preventing interference with the rotation of the inner cylinder.

[0014] However, in the case of this structure, since the alignment of the receiver and transmitter for wireless charging is important, there is a problem in that power cannot be effectively supplied from the power supply element if the alignment is misaligned due to the operation of the drum, etc.

[0015] As described above, laundry treatment devices, which apply thermal energy to a drum containing laundry to process laundry, face the challenge of efficiently measuring temperature during the treatment process without interfering with the operation of the rotating drum. However, conventional laundry treatment devices have limitations in adequately addressing this challenge.

[0016] The present invention aims to solve the above-mentioned problems of a laundry treatment device that performs laundry treatment by applying thermal energy to a drum containing laundry.

[0017] Specifically, the present invention aims to provide a laundry treatment device capable of directly and accurately measuring the temperature during the treatment process for laundry.

[0018] In addition, the present invention aims to provide a laundry treatment device capable of measuring the temperature during the treatment process of laundry without a separate external power supply.

[0019] In addition, the present invention aims to provide a laundry treatment device that can measure the temperature during the treatment process for laundry and smoothly control it accordingly.

[0020]

[0021] The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0022] To achieve the above or other objectives, a laundry treatment device according to one aspect of the present invention is configured to directly detect the temperature of laundry during the treatment process. Specifically, when the temperature of the drum changes due to thermal energy generated from a heat source, a drum sensing unit is configured to detect the temperature of the drum and detect the temperature of the laundry during the treatment process.

[0023] In addition, a laundry treatment device according to one aspect of the present invention is configured to generate electric energy on its own without a separate external power supply and use it as a power source for temperature measurement. Specifically, the device is configured to generate electric energy based on a temperature difference between a first end and a second end from a power generation unit attached to the outer surface of the drum and supply the generated electric energy to a drum sensing unit that detects the temperature of the drum.

[0024] In addition, a laundry treatment device according to one aspect of the present invention is configured to transmit detected drum temperature data to a separately installed control unit. Specifically, the device is configured to transmit drum temperature data to a control unit installed separately from the sensor module via the communication unit of the sensor module, thereby performing control accordingly.

[0025] In addition, a laundry treatment device according to one aspect of the present invention may include a drum temperature sensor for measuring the temperature of the drum in the drum sensing unit.

[0026] In addition, a laundry treatment device according to one aspect of the present invention may include a voltage sensor for measuring the voltage of a power generation unit in a drum sensing unit.

[0027] In addition, a laundry treatment device according to one aspect of the present invention can calculate the temperature of a drum by calculating voltage data measured by a voltage sensor and temperature data detected by a reference sensor unit in a control unit.

[0028] In addition, a laundry treatment device according to one aspect of the present invention can calculate the temperature of a drum by calculating voltage data measured by a voltage sensor and temperature data detected by a reference sensor unit in a sensor module.

[0029] In addition, in a laundry treatment device according to one aspect of the present invention, the drum can be heated by converting electric energy induced by an induction heating unit into thermal energy according to internal resistance.

[0030] In addition, the laundry treatment device according to one aspect of the present invention may be arranged in a section where the induction heating unit and the sensor module do not overlap each other.

[0031] In addition, a laundry treatment device according to one aspect of the present invention can be attached to the outer surface of a drum with the sensor module accommodated in the housing.

[0032] In addition, a laundry treatment device according to one aspect of the present invention may include a housing portion including a housing base and a housing cover.

[0033] In addition, in a laundry treatment device according to one aspect of the present invention, heat energy of the drum can be transferred through a base heat transfer body formed at a first end of a power generation unit.

[0034] In addition, in a laundry treatment device according to one aspect of the present invention, the thermal energy of the drum can be transmitted through a housing base with which the first end of the power generation unit is in contact.

[0035] In addition, in a laundry treatment device according to one aspect of the present invention, heat energy of air or water outside the drum can be transferred through a cover heat transfer body formed at a second end of a power generation unit.

[0036] In addition, a laundry treatment device according to one aspect of the present invention may have heat dissipation fins formed parallel to the rotational direction of the drum on a portion of the drum that comes into contact with air or water.

[0037] In addition, in a laundry treatment device according to one aspect of the present invention, a sealing body may be interposed in a portion where a base heat transfer body or a cover heat transfer body penetrates a housing portion.

[0038] In addition, a laundry treatment device according to one aspect of the present invention may have a base heat transfer body or a cover heat transfer body formed by double injection with the housing portion.

[0039] In addition, in a laundry treatment device according to one aspect of the present invention, heat energy of air or water outside the drum can be transmitted through a housing cover with which a second end of a power generating unit is in contact.

[0040] In addition, in a laundry treatment device according to one aspect of the present invention, the drum and the housing portion are made of the same material, and heat energy can be transferred between the housing base and the housing cover only through the power generation portion.

[0041] In addition, in a laundry treatment device according to one aspect of the present invention, the drum can be heated by the heat energy transferred as air heated by a heat source unit installed in the duct unit flows into the drum.

[0042]

[0043] The means for solving the technical problems to be solved by the present invention are not limited to the means for solving the problems mentioned above, and other means for solving the problems not mentioned will be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0044] FIG. 1 is a perspective view showing a laundry treatment device according to one embodiment of the present invention.

[0045] FIG. 2 is a drawing showing a state in which the cabinet has been removed from the laundry treatment device illustrated in FIG. 1.

[0046] Figures 3 and 4 are drawings showing a state in which a sensor module is installed in the laundry treatment device illustrated in Figure 2.

[0047] FIG. 5 is a drawing showing a housing portion in which a sensor module is accommodated in a laundry treatment device according to one embodiment of the present invention.

[0048] Figure 6 is a drawing showing the main components shown in Figure 5 in an exploded state.

[0049] Fig. 7 is a drawing showing the main configuration illustrated in Fig. 5 with the housing cover removed.

[0050] Figure 8 is a drawing showing a cross-section of the main configuration illustrated in Figure 5.

[0051] Fig. 9 is a drawing showing a housing base in the main configuration illustrated in Fig. 5.

[0052] Figures 10 and 11 are drawings showing the housing cover in the main configuration illustrated in Figure 5.

[0053] FIGS. 12 to 15 are drawings exemplarily showing a structure for transferring heat energy to a power generation unit in a laundry treatment device according to one embodiment of the present invention.

[0054] FIG. 16 is a drawing showing a state in which a cabinet is removed from a laundry treatment device according to another embodiment of the present invention.

[0055] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, in describing the present invention, descriptions of functions or configurations already known will be omitted to clarify the gist of the present invention.

[0056] The X direction, the Y direction, and the Z direction described in the embodiments of the present invention may each be directions that are orthogonal to each other. Each of the X direction and the Y direction may be a direction parallel to the horizontal direction, and the Z direction may be a direction parallel to the vertical direction. When the X direction is a direction parallel to the left-right direction, the Y direction may be a direction parallel to the front-back direction. When the X direction is a direction parallel to the front-back direction, the Y direction may be a direction parallel to the left-right direction.

[0057]

[0058] Fig. 1 is a perspective view showing a laundry treatment device (1000) according to one embodiment of the present invention. Fig. 2 is a drawing showing a state in which a cabinet (10) has been removed from the laundry treatment device (1000) shown in Fig. 1. Figs. 3 and 4 are drawings showing a state in which a sensor module (300) has been installed in the laundry treatment device (1000) shown in Fig. 2.

[0059] A laundry treatment device (1000) like this may also be used under other names. For example, a laundry treatment device (1000) according to one embodiment of the present invention may be used as a washing machine, a dryer, a washing machine / dryer, or a clothing care device.

[0060] As illustrated in FIGS. 1 to 4, a laundry treatment device (1000) according to one embodiment of the present invention may be composed of a cabinet (10) forming an exterior, and a drum (200) rotatably installed inside the cabinet (10) to accommodate laundry.

[0061] An inlet may be formed on the front of the cabinet (10) to allow laundry to be fed into the drum (200). In this case, the inlet may be opened and closed by a door (not shown) installed on the front of the cabinet (10).

[0062] Meanwhile, in FIGS. 1 to 4, a configuration in which a drum (200) is installed inside a tub (20) is illustrated, but this is not necessarily limited to this configuration, and depending on the function and type of the laundry treatment device (1000), the drum (200) may be installed inside a cabinet (10) without a tub (20).

[0063] A laundry treatment device (1000) according to one embodiment of the present invention includes a heat source unit (100), a drum (200), a sensor module (300), and a control unit (400).

[0064] The heat source (100) is a part that generates L energy, and can generate L energy by including a heater structure, an electrode structure, an induction heating structure, etc.

[0065] The drum (200) is a part that is installed rotatably, receives laundry, and changes its temperature by heat energy generated from the heat source (100). That is, the L energy generated from the heat source (100) can be transferred to the drum (200) to heat the drum (200).

[0066] The control unit (400) may be connected to each component of the laundry treatment device (1000) and may be configured to control the operation of each component.

[0067] In order to control the control unit (400), the laundry treatment device (1000) may be equipped with a storage medium in which an application program is stored. In addition, the control unit (400) may be configured to control the laundry treatment device (1000) by running the application program based on information input to the laundry treatment device (1000), information output from the laundry treatment device (1000), etc.

[0068] In this case, the control unit (400) can control the heat source unit (100) according to the temperature of the laundry. The laundry can be treated by applying the thermal energy of the heat source unit (100) to the drum (200) containing the laundry. However, in this case, it is necessary to measure the temperature during the treatment process to ensure the quality of the laundry being treated.

[0069] Accordingly, the control unit (400) can control whether or not heat energy is generated by the heat source unit (100), the size of the generation, the pattern of the generation, etc., depending on the measured temperature of the laundry, so as to ensure the quality of the laundry.

[0070] FIG. 5 is a drawing showing a housing part (600) in which a sensor module (300) is accommodated in a laundry treatment device (1000) according to one embodiment of the present invention. FIG. 6 is a drawing showing a state in which the main components shown in FIG. 5 are disassembled. FIG. 7 is a drawing showing a state in which the housing cover (620) is removed from the main components shown in FIG. 8 is a drawing showing a cross-section of the main components shown in FIG. 5. FIG. 9 is a drawing showing a housing base (610) in the main components shown in FIG. 5. FIG. 10 and FIG. 11 are drawings showing a housing cover (620) in the main components shown in FIG. 5.

[0071] The sensor module (300) is attached to the outer surface of the drum (200) on one side to transmit the thermal energy of the drum (200), and the other side comes into contact with the air or water on the outside of the drum (200), and uses the electric energy generated by the temperature difference at the contact point as a power source to detect the temperature of the drum (200).

[0072] In this case, the sensor module (300) includes a power generation unit (310), a drum sensing unit (320), and a communication unit (330).

[0073] The power generation unit (310) is attached to the outer surface of the drum (200), and the heat energy of the drum (200) is transmitted through the first end (310-1), and has a second end (310-2) that comes into contact with air or water on the outside of the drum (200), and is a part where electric energy is generated by the temperature difference between the first end (310-1) and the second end (310-2).

[0074] That is, the power generation unit (310) can generate electric energy on its own by using the Seebeck effect, which obtains electromotive force by using the temperature difference between the two ends among thermoelectric phenomena.

[0075] Specifically, the first end (310-1) of the power generation unit (310) can be brought into a relatively high temperature state by transferring the thermal energy of the drum (200). In addition, the second end (310-2) of the power generation unit (310) can be brought into a relatively low temperature state by transferring the thermal energy of the air or water outside the drum (200).

[0076] Accordingly, the power generation unit (310) can generate electric energy by the temperature difference between the first end (310-1) which is relatively high temperature and the second end (310-2) which is relatively low temperature.

[0077] The drum sensing unit (320) is a unit that is electrically coupled to the power generation unit (310) and receives electric energy generated from the power generation unit (310) to detect the temperature of the drum (200).

[0078] That is, the drum sensing unit (320) can be operated by power generated from the power generation unit (310) without being supplied with a separate external power source. In this way, the drum sensing unit (320) does not need to be connected with a separate wire, etc., so even if it is installed on a rotating drum (200), it may not interfere with the operation of the drum (200).

[0079] Accordingly, the drum sensing unit (320) is installed on the drum (200) and directly detects the temperature of the drum (200), thereby enabling the temperature of laundry contained inside the drum (200) to be determined during the processing process.

[0080] In this way, in the laundry treatment device (1000) according to one embodiment of the present invention, when the temperature of the drum (200) changes due to heat energy generated from the heat source (100), the drum sensing unit (320) detects the temperature of the drum (200) and determines the temperature during the laundry treatment process, so that temperature measurement for securing the quality of the laundry can be performed more directly and accurately.

[0081] In addition, the laundry treatment device (1000) according to one embodiment of the present invention generates electric energy by the temperature difference between the first end (310-1) and the second end (310-2) in the power generation unit (310) attached to the outer surface of the drum (200) and supplies the electric energy to the drum sensing unit (320) that detects the temperature of the drum (200), so that a separate external power supply is not required, and the temperature during the treatment process can be efficiently measured without interfering with the operation of the rotating drum (200).

[0082] The communication unit (330) is electrically coupled to the power generation unit (310) and the drum sensing unit (320), and is a unit that transmits the temperature data of the drum (200) detected by the drum sensing unit (320). In this case, the control unit (400) can receive the temperature data transmitted from the communication unit (330) and control the heat source unit (100).

[0083] That is, the communication unit (330) can also be operated by power generated by the power generation unit (310) without being supplied with a separate external power source. In addition, since the temperature data of the drum (200) detected by the drum sensing unit (320) is transmitted to the control unit (400) through the communication unit (330), even if the entire sensor module (300) is not connected to an external component or a separate wire, all functions of the sensor module (300) can be performed smoothly.

[0084] In this way, the laundry treatment device (1000) according to one embodiment of the present invention transmits the temperature data of the drum (200) to the control unit (400) installed separately from the sensor module (300) through the communication unit (330) of the sensor module (300) and performs control accordingly, so that control according to the temperature measurement results during the laundry treatment process can be smoothly performed.

[0085] In a laundry treatment device (1000) according to one embodiment of the present invention, the drum sensing unit (320) is operated by receiving electric energy from the power generation unit (310) and may include a drum temperature sensor (321) that measures the temperature of the drum (200).

[0086] That is, a drum temperature sensor (321) that detects heat and generates an electric signal is installed in the drum sensing unit (320) to measure the temperature of the drum (200). Accordingly, the temperature of the drum (200) can be measured without going through a relatively complex calculation process.

[0087] In this way, the laundry treatment device (1000) according to one embodiment of the present invention can easily obtain temperature data of the drum (200) since the drum sensing unit (320) includes a drum temperature sensor (321) that measures the temperature of the drum (200).

[0088] Here, the drum temperature sensor (321) can come into contact with the drum (200) by penetrating the housing portion (600) described later, and a sealing member can be interposed in this penetrating portion.

[0089] Meanwhile, the drum sensing unit (320) may also include a drum humidity sensor, etc. in addition to the drum temperature sensor (321), to measure the humidity of the drum (200).

[0090] In a laundry treatment device (1000) according to one embodiment of the present invention, the drum sensing unit (320) is operated by receiving electric energy from the power generation unit (310) and may include a voltage sensor (322) that measures the voltage of the power generation unit (310).

[0091] That is, a voltage sensor (322) that measures the amount of electricity of the measurement target is installed in the drum sensing unit (320) and can measure the voltage of the power generation unit (310). Accordingly, the temperature of the drum (200) can be indirectly measured by inversely calculating the electromotive force generated by the thermoelectric phenomenon.

[0092] In this way, the laundry treatment device (1000) according to one embodiment of the present invention includes a drum sensing unit (320) and a voltage sensor (322) that measures the voltage of the power generation unit (310), so that the temperature of the drum (200) can be calculated using the measured voltage data.

[0093] A laundry treatment device (1000) according to one embodiment of the present invention may further include a reference sensor unit (500) that detects the temperature of air or water outside the drum (200) in contact with the second end (310-2).

[0094] That is, the reference sensor unit (500) can detect the temperature of the air or water outside the drum (200) and determine the temperature of the second end (310-2) of the power generation unit (310).

[0095] In this case, the reference sensor unit (500) may be installed in the sensor module (300) or may be installed on the outside of the drum (200) separately from the sensor module (300). In addition, the structure and arrangement of the reference sensor unit (500) may be modified in various ways as needed, such as being installed on the inner surface of the tub (20).

[0096] In the case where the laundry treatment device (1000) according to one embodiment of the present invention further includes a reference sensor unit (500), the communication unit (330) transmits voltage data measured by the voltage sensor (322), and the control unit (400) receives the voltage data transmitted by the communication unit (330), converts it into temperature difference data between the first end (310-1) and the second end (310-2), and then calculates the temperature of the drum (200) by calculating it with the temperature data of the second end (310-2) detected by the reference sensor unit (500).

[0097] That is, voltage data can be obtained through the voltage sensor (322) of the sensor module (300), and such voltage data can be transmitted to the control unit (400) through the communication unit (330). In addition, the control unit (400) can detect the temperature difference between the first end (310-1) and the second end (310-2) through the transmitted voltage data, and calculate the temperature of the drum (200) with which the first end (310-1) is in contact by calculating the temperature difference with the temperature of the second end (310-2) detected by the reference sensor unit (500).

[0098] In the case described above, the sensor module (300) is only responsible for securing and transmitting voltage data, and the remaining functions are performed by the control unit (400), so the sensor module (300) can be configured with only a minimal configuration.

[0099] In this way, the laundry treatment device (1000) according to one embodiment of the present invention calculates the temperature of the drum (200) by calculating the voltage data measured by the voltage sensor (322) and the temperature data detected by the reference sensor unit (500) in the control unit (400), so that the configuration for calculation in the sensor module (300) is unnecessary, and thus the structure of the sensor module (300) can be further simplified.

[0100] In the case where the laundry treatment device (1000) according to one embodiment of the present invention further includes a reference sensor unit (500), the sensor module (300) can convert voltage data measured by the voltage sensor (322) into temperature difference data between the first end (310-1) and the second end (310-2), and then calculate the temperature of the drum (200) by calculating the temperature difference data of the second end (310-2) detected by the reference sensor unit (500).

[0101] That is, voltage data can be obtained through the voltage sensor (322) of the sensor module (300), and the sensor module (300) can perform calculations on its own without transmitting the voltage data. Accordingly, the sensor module (300) can determine the temperature difference between the first end (310-1) and the second end (310-2) through the voltage data on its own, and calculate the temperature of the drum (200) with which the first end (310-1) is in contact by calculating the temperature difference with the temperature of the second end (310-2) detected by the reference sensor unit (500).

[0102] In the case above, the process of performing the function can be faster and simpler in that the temperature of the drum (200) can be calculated even without going through the control unit (400).

[0103] In this way, the laundry treatment device (1000) according to one embodiment of the present invention calculates the temperature of the drum (200) by calculating the voltage data measured by the voltage sensor (322) and the temperature data detected by the reference sensor unit (500) in the sensor module (300), so that the temperature of the drum (200) can be calculated even without using a separate control unit (400).

[0104] A laundry treatment device (1000) according to one embodiment of the present invention may further include an induction heating unit (110) installed on the outer circumferential side of the drum (200) to induce electric energy to the drum (200) by electromagnetic induction.

[0105] In this case, the drum (200) can change its temperature by converting the electric energy induced by the induction heating unit (110) into thermal energy according to its internal resistance.

[0106] Specifically, the induction heating unit (110) may include an induction heater. The induction heater may be a heater that uses an induced current generated by a magnetic field as a heat source. When a drum (200) (metal) is positioned within a magnetic field generated by the induction heating unit (110), an eddy current is generated in the drum (200) due to an electromagnetic induction phenomenon, and the drum (200) may be heated by Joule heat.

[0107] The induction heating unit (110) can be fixed to the tub (20) while being spaced apart from the drum (200). When the induction heating unit (110) is operated, the drum (200), which is made of a metal material, can be heated. The tub (20) is made of a material (e.g., synthetic resin) through which a magnetic field can pass, and the induction heating unit (110) can be placed on the outside of the tub (20).

[0108] According to an embodiment, the induction heating unit (110) may be placed inside the tub (20).

[0109] The induction heating unit (110) can be fixedly installed on the outer surface of the tub (20), and the drum (200) inside the tub (20) can be heated by the operation of the induction heating unit (110). When the drum (200) rotates inside the tub (20), the entire circumferential direction of the drum (200) can be evenly heated by the induction heating unit (110).

[0110] In this way, the laundry treatment device (1000) according to one embodiment of the present invention heats the drum (200) by converting the electric energy induced by the induction heating unit (110) into thermal energy according to the internal resistance, so that more uniform heating can be achieved for the entire drum (200).

[0111] Meanwhile, the above-described induction heating unit (110) may be a type of heat source unit (100), and accordingly, the induction heating unit (110) may not be installed separately from the heat source unit (100), but may be installed in place of the heat source unit (100).

[0112] In a laundry treatment device (1000) according to one embodiment of the present invention, the induction heating unit (110) may be arranged in a first section (S1) in the longitudinal direction of the drum (200), and the sensor module (300) may be arranged in a second section (S2) that does not overlap with the first section (S1) in the longitudinal direction of the drum (200).

[0113] That is, referring to Fig. 4, the longitudinal direction of the drum (200) may be the Y direction. In addition, in the longitudinal direction of the drum (200), the induction heating unit (110) may be arranged in the first section (S1), and the sensor module (300) may be arranged in the second section (S2). Here, the first section (S1) and the second section (S2) may be sections that do not overlap each other.

[0114] As described above, when electric energy is generated by electromagnetic induction in the induction heating unit (110), this electromagnetic induction phenomenon may affect each component of the sensor module (300).

[0115] If the sensor module (300) is affected by the electromagnetic induction phenomenon in this way, there is a risk that the function of at least one of the power generation unit (310), drum sensing unit (320), and communication unit (330) may be degraded.

[0116] Therefore, it may be desirable to place the induction heating unit (110) by avoiding the section where the sensor module (300) is placed so as to minimize the influence of the electromagnetic induction phenomenon on the sensor module (300).

[0117] In this way, the laundry treatment device (1000) according to one embodiment of the present invention can minimize interference with the function of the sensor module (300) due to electromagnetic induction of the induction heating unit (110) by the sensor module (300) since the induction heating unit (110) and the sensor module (300) are arranged in a section where they do not overlap each other.

[0118] A laundry treatment device (1000) according to one embodiment of the present invention may further include a housing portion (600) that accommodates a sensor module (300) and is attached to the outer surface of a drum (200).

[0119] That is, the housing part (600) has a receiving space formed inside, and a sensor module (300) can be received in this receiving space. In addition, a portion of the housing part (600) can be attached by being joined to the outer surface of the drum (200).

[0120] In this case, the housing portion (600) can be joined to the outer surface of the drum (200) through welding, riveting, bolting, or the like.

[0121] In this way, the laundry treatment device (1000) according to one embodiment of the present invention has a sensor module (300) attached to the outer surface of the drum (200) while being accommodated in the housing portion (600), so that the sensor module (300) can be installed more stably.

[0122] In a laundry treatment device (1000) according to one embodiment of the present invention, the housing part (600) may include a housing base (610) and a housing cover (620).

[0123] The housing base (610) is the part where the sensor module (300) is installed, and can constitute the lower part of the exterior of the housing part (600).

[0124] The housing cover (620) is a part that is connected to the housing base (610) to cover the sensor module (300), and can constitute the upper part of the exterior of the housing portion (600).

[0125] Accordingly, the housing portion (600) containing the sensor module (300) can be assembled by first mounting the sensor module (300) on the housing base (610) and then covering the housing cover (620).

[0126] In this way, since the laundry treatment device (1000) according to one embodiment of the present invention includes a housing part (600) including a housing base (610) and a housing cover (620), assembly of the housing part (600) and the sensor module (300) can be more easily accomplished.

[0127] FIGS. 12 to 15 are drawings exemplarily showing a structure for transferring heat energy to a power generation unit (310) in a laundry treatment device (1000) according to one embodiment of the present invention.

[0128] Referring to FIGS. 12 to 15, the structure in which the housing portion (600) and the sensor module (300) are assembled will be described.

[0129] In a laundry treatment device (1000) according to one embodiment of the present invention, the power generation unit (310) may include a base heat transfer body (311) formed at the first end (310-1) to transfer heat energy of the drum (200).

[0130] In this case, the housing base (610) has a base penetration hole (611) formed at the portion where the power generation unit (310) is installed, and the base heat transfer body (311) can protrude to the outside of the housing unit (600) through the base penetration hole (611) and come into contact with the outer surface of the drum (200).

[0131] That is, as shown in FIG. 12 and FIG. 15, a base heat transfer body (311) penetrating the housing base (610) is formed at the first end (310-1) of the power generation unit (310), so that the first end (310-1) can receive the heat energy of the drum (200) through this base heat transfer body (311).

[0132] Here, it is preferable that the base heat transfer body (311) is made of a material having the same or similar thermal conductivity as the drum (200), so that the thermal energy of the drum (200) is transferred to the first end (310-1).

[0133] In this way, in the laundry treatment device (1000) according to one embodiment of the present invention, the thermal energy of the drum (200) is transferred through the base heat transfer body (311) formed at the first end (310-1) of the power generation unit (310), so that the thermal energy of the drum (200) can be transferred more smoothly to the power generation unit (310).

[0134] In a laundry treatment device (1000) according to one embodiment of the present invention, the power generation unit (310) has a first end (310-1) that is in contact with the inner surface of the housing base (610), and the outer surface of the housing base (610) can be in contact with the outer surface of the drum (200).

[0135] That is, as shown in FIGS. 13 and 14, the first end (310-1) of the power generation unit (310) does not directly contact the outer surface of the drum (200), and the first end (310-1) can receive the thermal energy of the drum (200) through the housing base (610).

[0136] Here, a heat transfer sheet (313) or a coating material, etc. may be interposed between the outer surface of the drum (200) and the outer surface of the housing base (610). In addition, it is preferable that the housing base (610) be made of a material having the same or similar thermal conductivity as the drum (200), so that the thermal energy of the drum (200) is transferred to the first end (310-1).

[0137] In this way, in the laundry treatment device (1000) according to one embodiment of the present invention, since the thermal energy of the drum (200) is transferred through the housing base (610) with which the first end (310-1) of the power generation unit (310) comes into contact, the thermal energy of the drum (200) can be transferred to the power generation unit (310) even without forming a separate through hole in the housing base (610).

[0138] In a laundry treatment device (1000) according to one embodiment of the present invention, the power generation unit (310) may further include a cover heat transfer body (312) formed at the second end (310-2) to transfer heat energy of air or water outside the drum (200).

[0139] In this case, the housing cover (620) has a cover penetration hole (621) formed in the portion that covers the power generation unit (310), and the cover heat transfer body (312) can protrude to the outside of the housing unit (600) through the cover penetration hole (621).

[0140] That is, as shown in FIGS. 12 and 14, a cover heat transfer body (312) penetrating the housing cover (620) is formed at the second end (310-2) of the power generation unit (310), so that the second end (310-2) can receive heat energy of air or water outside the drum (200) through this cover heat transfer body (312).

[0141] Here, it is preferable that the cover heat transfer body (312) is made of a material having the same or similar thermal conductivity as the drum (200), so that the thermal energy of the air or water outside the drum (200) is transferred to the second end (310-2).

[0142] In this way, in the laundry treatment device (1000) according to one embodiment of the present invention, the thermal energy of air or water outside the drum (200) is transferred through the cover heat transfer body (312) formed at the second end (310-2) of the power generation unit (310), so that the thermal energy of air or water outside the drum (200) can be transferred more smoothly to the power generation unit (310).

[0143] In a laundry treatment device (1000) according to one embodiment of the present invention, a heat dissipation fin (710) is formed on the outer surface of the housing cover (620) or on a portion of the cover heat transfer body (312) protruding outward from the housing cover (620), and the heat dissipation fin (710) can be formed to extend in a direction parallel to the rotational direction of the drum (200).

[0144] Since the electromotive force increases as the temperature difference between the first end (310-1) and the second end (310-2) in the power generation unit (310) increases, it may be desirable to lower the temperature of the second end (310-2) as much as possible compared to the first end (310-1), which is relatively high temperature.

[0145] To this end, a heat dissipation fin (710) can be formed on the outer surface of the housing cover (620) connected to the second end (310-2) or on the portion of the cover heat transfer body (312) protruding outward from the housing cover (620).

[0146] Meanwhile, since the heat dissipation fin (710) is formed with a fin structure extending along the length direction, it may be damaged due to resistance when the drum (200) rotates.

[0147] Therefore, it may be desirable to minimize the resistance received by the heat dissipation fin (710) when the drum (200) rotates by forming the heat dissipation fin (710) to extend in a direction parallel to the rotational direction of the drum (200).

[0148] In this way, the laundry treatment device (1000) according to one embodiment of the present invention has heat dissipation fins (710) formed parallel to the rotational direction of the drum (200) in a portion of the outside of the drum (200) that comes into contact with air or water, so that damage to the heat dissipation fins (710) for heat energy transfer can be minimized when the drum (200) rotates.

[0149] In a laundry treatment device (1000) according to one embodiment of the present invention, a sealing member (720) may be interposed between the base heat transfer member (311) and the base penetration hole (611) or between the cover heat transfer member (312) and the cover penetration hole (621).

[0150] As described above, when the base heat transfer body (311) penetrates the housing base (610) and the cover heat transfer body (312) penetrates the housing cover (620), there is a risk that moisture, etc. may flow into the penetration portion.

[0151] Therefore, it is preferable to interpose a sealing member (720) between the base heat transfer body (311) and the base penetration hole (611) or between the cover heat transfer body (312) and the cover penetration hole (621) to prevent moisture, etc. from flowing into the corresponding penetration portion.

[0152] In this way, the laundry treatment device (1000) according to one embodiment of the present invention can prevent moisture from penetrating into the interior of the housing (600) since the sealing body (720) is interposed in the portion where the base heat transfer body (311) or the cover heat transfer body (312) penetrates the housing (600).

[0153] In a laundry treatment device (1000) according to one embodiment of the present invention, the base heat transfer body (311) and the housing base (610) or the cover heat transfer body (312) and the housing cover (620) can be formed by double injection.

[0154] Here, the double injection method is a method of injection molding using different injection materials, and is a method of molding by filling the space between the first molded product and the second cavity with the second injection material.

[0155] In the case of this double injection method, it is preferable to double-inject the base heat transfer body (311) and the housing base (610) or the cover heat transfer body (312) and the housing cover (620) to prevent moisture, etc. from entering, in that airtightness can be secured at the connection part of the completed molded product.

[0156] In this way, the laundry treatment device (1000) according to one embodiment of the present invention can prevent moisture from penetrating into the interior of the housing (600) since the base heat transfer body (311) or the cover heat transfer body (312) is formed with the housing (600) through a double injection method.

[0157] In a laundry treatment device (1000) according to one embodiment of the present invention, the power generation unit (310) has a second end (310-2) that is in contact with the inner surface of the housing cover (620), and the outer surface of the housing cover (620) can be in contact with air or water outside the drum (200).

[0158] That is, as shown in FIGS. 13 and 15, the second end (310-2) of the power generation unit (310) does not come into direct contact with the air or water outside the drum (200), and the second end (310-2) can receive thermal energy of the air or water outside the drum (200) through the housing curve.

[0159] Here, it is preferable that the housing cover (620) be made of a material having the same or similar thermal conductivity as the drum (200), so that the thermal energy of the air or water outside the drum (200) is transferred to the second end (310-2).

[0160] In this way, in the laundry treatment device (1000) according to one embodiment of the present invention, the thermal energy of air or water outside the drum (200) is transferred through the housing cover (620) with which the second end (310-2) of the power generation unit (310) comes into contact, so that even without forming a separate through hole in the housing cover (620), the thermal energy of air or water outside the drum (200) can be transferred to the power generation unit (310).

[0161] In a laundry treatment device (1000) according to one embodiment of the present invention, the housing base (610) and the housing cover (620) are made of the same material as the outer surface of the drum (200), and an insulator (730) may be interposed between the housing base (610) and the housing cover (620).

[0162] As described above, since the housing part (600) is coupled to the outer surface of the drum (200), it may be desirable for the housing part (600) and the drum (200) to be made of the same material so that their thermal expansion coefficients, etc. are identical to minimize errors.

[0163] However, if the housing part (600) is made of the same material as the drum (200), and heat transfer occurs directly between the housing base (610) and the housing cover (620), the heat transfer that should be transferred to the power generation part (310) may not be smooth.

[0164] Therefore, it is desirable to prevent heat transfer to this part by interposing an insulator (730) in the remaining part except for the part where the housing part (600) is connected to the power generation part (310).

[0165] In this way, the laundry treatment device (1000) according to one embodiment of the present invention has a drum (200) and a housing portion (600) made of the same material, and heat energy is transferred between the housing base (610) and the housing cover (620) only through the power generation portion (310), so that the efficiency of heat energy transfer to the power generation portion (310) can be further improved.

[0166] FIG. 16 is a drawing showing a state in which a cabinet (10) is removed from a laundry treatment device (2000) according to another embodiment of the present invention.

[0167] A laundry treatment device (2000) according to another embodiment of the present invention includes a drum (200), a duct section (800), a fan (900), a heat source section (100), a sensor module (300), and a control section (400).

[0168] The drum (200) is a part that is installed so as to be rotatable and receives laundry.

[0169] Meanwhile, in FIG. 16, a configuration is illustrated in which a drum (200) is installed inside a tub (20), but this is not necessarily limited to this configuration, and depending on the function and type of the laundry treatment device (2000), the drum (200) may be installed inside a cabinet (10) without a tub (20).

[0170] The duct section (800) is a section configured to discharge air from one side of the drum (200) and allow air to flow in from the other side.

[0171] That is, the duct section (800) is a section installed on the drum (200) to form an air path, and forms a path that allows air discharged to the outside of the drum (200) to flow back into the drum (200) without being scattered.

[0172] The fan (900) is a part that generates air flow to the duct section (800) and drum (200).

[0173] That is, the fan (900) is a part that transfers air discharged from the drum (200) along the duct part (800), and transfers the air at a predetermined pressure so that the air circulation direction is formed consistently.

[0174] The heat source part (100) is a part installed in the duct part (800) and heats the air flowing into the drum (200).

[0175] That is, the heat source section (100) is a section that generates L energy, and heats the low-temperature air transported along the duct section (800) and converts it into a high-temperature state.

[0176] In this case, the drum (200) can be heated by the heat energy transferred as air heated by the heat source (100) is introduced.

[0177] The sensor module (300) is a part that is attached to the outer surface of the drum (200) on one side to transmit the thermal energy of the drum (200), and on the other side to come into contact with the air or water on the outside of the drum (200) and uses the electric energy generated by the temperature difference at the contact point as a power source to detect the temperature of the drum (200).

[0178] The control unit (400) is a part that receives data from the sensor module (300) and controls the heat source unit (100) and fan (900).

[0179] That is, the control unit (400) can control the operation of the heat source unit (100) and the fan (900), the operation output, and the operation pattern, etc., according to the detected temperature of the drum (200), so that the quality of the laundry is secured.

[0180] In this way, in the laundry treatment device (2000) according to another embodiment of the present invention, the drum (200) is heated by the heat energy transferred as air heated by the heat source (100) installed in the duct (800) flows into the drum (200), so that the temperature change of the inside of the drum (200) containing the laundry can easily occur.

[0181] Meanwhile, the laundry treatment device (2000) according to another embodiment of the present invention has the same or similar main configuration as the laundry treatment device (1000) according to one embodiment of the present invention except for the features specifically described above, so a detailed description of the overlapping content will be omitted.

[0182]

[0183] While specific embodiments of the present invention have been described and illustrated above, it will be apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications or variations should not be understood individually from the technical spirit or perspective of the present invention, and such modified embodiments should fall within the scope of the claims of the present invention.

[0184] According to at least one of the embodiments of the present invention, when the temperature of the drum changes due to heat energy generated from the heat source, the drum sensing unit detects the temperature of the drum and determines the temperature during the laundry treatment process, so that temperature measurement for securing the quality of the laundry can be performed more directly and accurately.

[0185] In addition, according to at least one of the embodiments of the present invention, electric energy is generated by a temperature difference between a first end and a second end in a power generating unit attached to the outer surface of the drum and supplied to a drum sensing unit that detects the temperature of the drum, so that a separate external power supply is not required, and the temperature during the processing can be efficiently measured without interfering with the operation of the rotating drum.

[0186] In addition, according to at least one of the embodiments of the present invention, temperature data of the drum is transmitted to a control unit installed separately from the sensor module through a communication unit of the sensor module, and control is performed accordingly, so that control can be performed smoothly according to the temperature measurement results during the laundry treatment process.

[0187] In addition, according to at least one of the embodiments of the present invention, since the drum sensing unit includes a drum temperature sensor that measures the temperature of the drum, temperature data of the drum can be easily obtained.

[0188] In addition, according to at least one of the embodiments of the present invention, since the drum sensing unit includes a voltage sensor that measures the voltage of the power generation unit, the temperature of the drum can be calculated using the measured voltage data.

[0189] In addition, according to at least one of the embodiments of the present invention, since the control unit calculates the temperature of the drum by calculating the voltage data measured by the voltage sensor and the temperature data detected by the reference sensor unit, the structure of the sensor module can be further simplified since a configuration for calculation is unnecessary in the sensor module.

[0190] In addition, according to at least one of the embodiments of the present invention, the temperature of the drum is calculated by calculating the voltage data measured by the voltage sensor and the temperature data detected by the reference sensor unit in the sensor module, so that the temperature of the drum can be calculated even without using a separate control unit.

[0191] In addition, according to at least one of the embodiments of the present invention, since the electric energy induced by the induction heating unit is converted into thermal energy according to the internal resistance to heat the drum, more uniform heating can be achieved throughout the drum.

[0192] In addition, according to at least one of the embodiments of the present invention, since the induction heating unit and the sensor module are arranged in a section that does not overlap each other, interference with the function of the sensor module due to electromagnetic induction of the induction heating unit can be minimized.

[0193] In addition, according to at least one of the embodiments of the present invention, since the sensor module is attached to the outer surface of the drum while being accommodated in the housing portion, the sensor module can be installed more stably.

[0194] In addition, according to at least one of the embodiments of the present invention, since the housing part includes a housing base and a housing cover, assembly of the housing part and the sensor module can be made more easily.

[0195] In addition, according to at least one of the embodiments of the present invention, since the thermal energy of the drum is transferred through the base heat transfer body formed at the first end of the power generation unit, the thermal energy of the drum can be transferred more smoothly to the power generation unit.

[0196] In addition, according to at least one of the embodiments of the present invention, since the thermal energy of the drum is transmitted through the housing base with which the first end of the power generation unit is in contact, the thermal energy of the drum can be transmitted to the power generation unit even without forming a separate through hole in the housing base.

[0197] In addition, according to at least one of the embodiments of the present invention, since the thermal energy of the air or water outside the drum is transferred through the cover heat transfer body formed at the second end of the power generation unit, the thermal energy of the air or water outside the drum can be transferred more smoothly to the power generation unit.

[0198] In addition, according to at least one of the embodiments of the present invention, since a heat dissipation fin is formed parallel to the rotational direction of the drum at a portion of the drum that comes into contact with air or water outside the drum, damage to the heat dissipation fin for heat energy transfer can be minimized when the drum rotates.

[0199] In addition, according to at least one of the embodiments of the present invention, since a sealing member is interposed in a portion where the base heat transfer body or the cover heat transfer body penetrates the housing portion, moisture can be prevented from penetrating into the interior of the housing portion.

[0200] In addition, according to at least one of the embodiments of the present invention, since the base heat transfer body or the cover heat transfer body is formed with the housing part through a double injection method, it is possible to prevent moisture from penetrating into the interior of the housing part.

[0201] In addition, according to at least one of the embodiments of the present invention, since the thermal energy of the air or water outside the drum is transferred through the housing cover with which the second end of the power generation unit is in contact, the thermal energy of the air or water outside the drum can be transferred to the power generation unit even without forming a separate through hole in the housing cover.

[0202] In addition, according to at least one of the embodiments of the present invention, since the drum and the housing portion are made of the same material and heat energy is transferred between the housing base and the housing cover only through the power generation portion, the efficiency of heat energy transfer to the power generation portion can be further improved.

[0203] In addition, according to at least one of the embodiments of the present invention, the drum is heated by the heat energy transferred as the air heated by the heat source installed in the duct section flows into the drum, so that the temperature change of the inside of the drum containing the laundry can be easily achieved.

Claims

1. Heat source that generates heat energy; A drum that is installed rotatably to receive laundry and whose temperature changes due to heat energy generated from the heat source; A power generation unit that is attached to the outer surface of the drum and transmits the heat energy of the drum through the first end and has a second end that comes into contact with air or water outside the drum, and generates electric energy by the temperature difference between the first end and the second end. A drum sensing unit that is electrically coupled to the power generation unit and receives electric energy generated from the power generation unit to detect the temperature of the drum, and A sensor module electrically coupled to the power generation unit and the drum sensing unit, and including a communication unit that transmits temperature data of the drum detected by the drum sensing unit; and A control unit that receives temperature data transmitted from the communication unit and controls the heat source unit; A laundry treatment device comprising:

2. In paragraph 1, The above drum sensing unit, A laundry treatment device that operates by receiving electric energy from the power generation unit and includes a drum temperature sensor that measures the temperature of the drum.

3. In paragraph 1, The above drum sensing unit, A laundry treatment device that operates by receiving electric energy from the power generation unit and includes a voltage sensor that measures the voltage of the power generation unit.

4. In paragraph 3, Further comprising a reference sensor unit for detecting the temperature of air or water outside the drum in contact with the second end; The above communication unit transmits voltage data measured by the voltage sensor, A laundry treatment device, wherein the control unit receives voltage data transmitted from the communication unit, converts it into temperature difference data between the first end and the second end, and calculates the temperature of the drum by calculating the temperature difference data with the temperature data of the second end detected by the reference sensor unit.

5. In paragraph 3, Further comprising a reference sensor unit for detecting the temperature of air or water outside the drum in contact with the second end; A laundry treatment device in which the sensor module converts voltage data measured by the voltage sensor into temperature difference data between the first end and the second end, and then calculates the temperature of the drum by calculating the temperature difference data of the second end detected by the reference sensor unit.

6. In paragraph 1, It further includes an induction heating unit installed on the outer circumferential side of the drum and inducing electric energy to the drum by electromagnetic induction; The drum is a laundry treatment device in which the temperature changes by converting the electric energy induced by the induction heating unit into thermal energy according to the internal resistance.

7. In paragraph 6, The above induction heating unit is arranged in a first section along the length of the drum, A laundry treatment device, wherein the sensor module is arranged in a second section that does not overlap with the first section in the longitudinal direction of the drum.

8. In paragraph 1, A housing portion that accommodates the sensor module and is attached to the outer surface of the drum; A laundry treatment device further comprising:

9. In paragraph 8, The above housing part, A housing base on which the above sensor module is mounted and A laundry treatment device comprising a housing cover coupled to the housing base to cover the sensor module.

10. In paragraph 9, The above power generation unit, It includes a base heat transfer body formed at the first end and transmitting the heat energy of the drum, The above housing base has a base penetration hole formed in the part where the power generation unit is installed. A laundry treatment device in which the base heat transfer body protrudes outward from the housing portion through the base penetration hole and comes into contact with the outer surface of the drum.

11. In paragraph 9, The power generating unit has the first end in contact with the inner surface of the housing base, A laundry treatment device in which the outer surface of the housing base is in contact with the outer surface of the drum.

12. In paragraph 10, The above power generation unit, It further includes a cover heat transfer body formed at the second end and transmitting the heat energy of air or water outside the drum, The above housing cover has a cover penetration hole formed in the part that covers the power generation unit. A laundry treatment device in which the cover heat transfer body protrudes to the outside of the housing portion through the cover penetration hole.

13. In paragraph 12, A heat dissipation fin is formed on the outer surface of the housing cover or on the cover heat transfer body portion protruding from the outside of the housing cover, A laundry treatment device, wherein the above heat dissipation fins are formed to extend in a direction parallel to the rotational direction of the drum.

14. In paragraph 12, A laundry treatment device, wherein a sealing member is interposed between the base heat transfer body and the base penetration hole or between the cover heat transfer body and the cover penetration hole.

15. In paragraph 12, A laundry treatment device wherein the base heat transfer body and the housing base or the cover heat transfer body and the housing cover are formed by double injection.

16. In paragraph 10, The power generating unit has the second end in contact with the inner surface of the housing cover, A laundry treatment device in which the outer surface of the housing cover is in contact with air or water outside the drum.

17. In paragraph 16, A heat dissipation fin is formed on the outer surface of the housing cover or on the cover heat transfer body portion protruding from the outside of the housing cover, A laundry treatment device, wherein the above heat dissipation fins are formed to extend in a direction parallel to the rotational direction of the drum.

18. In paragraph 9, The above housing base and the above housing cover are made of the same material as the outer surface of the drum, A laundry treatment device, wherein an insulator is interposed between the housing base and the housing cover.

19. A drum that is installed rotatable and accommodates laundry; An induction heating unit installed on the outer circumferential side of the drum and inducing electric energy to the drum through electromagnetic induction; A sensor module that detects the temperature of the drum by using electric energy generated by a temperature difference between the contact points by contacting the air or water outside the drum and transmitting the thermal energy of the drum to one side and the other side; and A control unit that receives temperature data of the sensor module and controls the induction heating unit; The above drum is a laundry treatment device in which electric energy induced by the above induction heating unit is converted into thermal energy according to internal resistance and heated.

20. A drum that is installed rotatable and accommodates laundry; A duct section configured to discharge air from one side of the drum and introduce air from the other side; A fan that generates air flow through the duct section and the drum; A heat source unit installed in the above duct unit to heat the air flowing into the drum; A sensor module that detects the temperature of the drum by using electric energy generated by a temperature difference between the contact points by contacting the air or water outside the drum and transmitting the thermal energy of the drum to one side and the other side; and A control unit that receives data from the sensor module and controls the heat source unit and the fan; A laundry treatment device, wherein the drum is heated by heat energy transferred as air heated by the heat source is introduced.

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