KR100803034B1 - Steam cleaner - Google Patents

Steam cleaner Download PDF

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Publication number
KR100803034B1
KR100803034B1 KR1020060134795A KR20060134795A KR100803034B1 KR 100803034 B1 KR100803034 B1 KR 100803034B1 KR 1020060134795 A KR1020060134795 A KR 1020060134795A KR 20060134795 A KR20060134795 A KR 20060134795A KR 100803034 B1 KR100803034 B1 KR 100803034B1
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KR
South Korea
Prior art keywords
steam
electric heater
flow rate
pump
water
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KR1020060134795A
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Korean (ko)
Inventor
신혜경
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웅진쿠첸 주식회사
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Priority to KR1020060134795A priority Critical patent/KR100803034B1/en
Priority to PCT/KR2007/003424 priority patent/WO2008078867A1/en
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Publication of KR100803034B1 publication Critical patent/KR100803034B1/en

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/34—Machines for treating carpets in position by liquid, foam, or vapour, e.g. by steam
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4011—Regulation of the cleaning machine by electric means; Control systems and remote control systems therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/408—Means for supplying cleaning or surface treating agents
    • A47L11/4086—Arrangements for steam generation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs
    • F22B1/285—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs the water being fed by a pump to the reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
    • F22D5/26—Automatic feed-control systems
    • F22D5/32—Automatic feed-control systems influencing the speed or delivery pressure of the feed pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

A steam cleaner is provided to prevent steam from being sprayed continuously when the steam cleaner no longer moves and thus to prevent deformation of a floor caused by heat or remaining water. A steam cleaner comprises a power switch, a water tank(10), a steam generating unit(30), a pump(20), a movement sensor, and a control unit. The steam generating unit has an electric heater(35) inside, and generates steam by boiling water. The pump is installed on a pipe, and adjusts water flow supplied to the steam generating unit. The pipe connects the steam generating unit and the water tank. The control unit is electrically connected to the electric heater, the pump, and the movement sensor, and controls the electric heater and the pump by outputting a control signal according to information detected by the movement sensor. The control unit cuts off power supplied to the electric heater and stops the pump when the movement sensor detects no movement.

Description

스팀청소기{Steam Cleaner}Steam Cleaner

도 1 은 본 발명에 따른 스팀청소기를 개략적으로 도시한 구성도.1 is a schematic view showing a steam cleaner according to the present invention.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10: 물통10: bucket

20: 유량조절가능형 펌프20: Flow Adjustable Pump

30: 스팀발생장치30: steam generator

35: 전기히터35: electric heater

본 발명은 스팀청소기에 관한 것으로서, 더욱 상세하게는 청소기의 움직임에 따라 스팀 분사량을 조절할 수 있도록 하는 스팀청소기에 관한 것이다. The present invention relates to a steam cleaner, and more particularly, to a steam cleaner to adjust the amount of steam injection according to the movement of the cleaner.

일반적으로, 가정에서의 청소는 빗자루나 진공청소기를 이용하여 바닥의 먼지를 제거하는 초기작업과, 물걸레를 이용하여 찌든 때나 기름 등 이물질을 제거하는 마무리작업 순서로 진행된다. In general, cleaning at home is performed in the initial operation of removing dust from the floor using a broom or a vacuum cleaner, and finishing work of removing foreign matters such as dust or oil using a mop.

물걸레를 이용한 마무리 청소작업은 일정 정도의 이물질 제거능력을 유지하기 위하여 수분이 적정수준 이상으로 유지될 필요가 있어 자주 물에 담갔다가 짜주는 작업을 필요로 하며, 그 자체로 각종 세균을 비롯한 미생물의 서식에 적합한 조건을 제공함에 따라 별도의 살균처리를 하지 않는 경우에는 상당히 비위생적인 측면이 있었다. In order to maintain the ability to remove foreign substances, the final cleaning work using a mop needs to keep the water at an appropriate level or higher, so that it needs to be immersed in water and squeezed frequently. There were quite unsanitary aspects in the absence of separate sterilization as it provided conditions suitable for the habitat.

또한, 찌든 때나 찌든 기름 등은 일반적인 물걸레를 이용하여 쉽게 제거되지 않음에 따라 다수 회 반복하여 닦아 줘야만 어느 정도 오염물질 제거효과를 볼 수 있으며, 이를 개선하고자 뜨거운 물에 적셔 사용하는 경우에도 오염물질 제거효과가 다소 개선되기는 하지만 근본적인 해결책은 되지 못함에 따라, 청소작업을 수행하는 사람을 체력적으로 피곤하게 할 수 있는 여지가 있다 할 수 있다. In addition, steamed or steamed oil is not easily removed by using a general mop, so it must be wiped repeatedly several times to see the effect of removing pollutants to some extent. Although the removal effect is somewhat improved, it is not a fundamental solution, and there is room for physical fatigue of the person doing the cleaning.

근래 들어, 이상과 같은 불편함을 해소하고자 일반적인 가정에서 청소용도로 사용할 수 있도록 개발된 스팀청소기의 보급이 보편화되고 있는 추세이다.In recent years, in order to solve such inconveniences, the spread of steam cleaners developed for use in general households for cleaning purposes is becoming more common.

스팀청소기는 고온의 스팀(steam)을 오염된 청소대상부위에 분사하여 찌든 때나 기름 등 오염물질의 성질을 용융 또는 활성화를 통해 청소대상부위로부터 쉽게 제거될 수 있도록 변화시켜, 청소효과를 증대시키고 작업자의 수고를 현저히 줄일 수 있도록 하고 있다. The steam cleaner sprays hot steam on the contaminated cleaning target to change the properties of contaminants such as steam or oil so that it can be easily removed from the cleaning target by melting or activating, increasing the cleaning effect and It is possible to significantly reduce the labor of the.

또한, 스팀청소기에 부착되는 걸레에 고온의 스팀이 직접적으로 공급됨에 따라 오염물질에 의해 더러워지며, 청소 도중에도 지속적으로 살균이 이루어져 세균 등의 번식을 차단함으로써 위생적인 측면에서도 바람직한 효과를 제공하고 있다 할 수 있다.In addition, as the hot steam is directly supplied to the mop attached to the steam cleaner, it is polluted by contaminants, and it is continuously sterilized during cleaning to block propagation of bacteria, thereby providing a desirable effect in hygienic aspects. can do.

종래기술에 따른 일반적인 스팀청소기는 물을 공급하기 위한 물통과, 전기히터가 내장되어 물을 가열하는 방법으로 스팀을 발생시키는 스팀발생장치 및 스팀발생장치와 물통을 연결하는 배관 상에 설치되어 물통의 물을 스팀발생장치에 공급하는 펌프를 주요 구성으로 하고 있으며, 스위치를 조작하여 전원을 인가시키면 스팀발생장치에 내장된 전기히터가 가열되어 스팀을 발생시키고, 스팀이 걸레를 경유하여 청소대상부위에 분사될 수 있도록 하는 구조로 이루어진다. A general steam cleaner according to the prior art is installed on a water tank for supplying water, a steam generator for generating steam by a method of heating water with a built-in electric heater, and a pipe connecting the water tank with the steam generator. The main configuration consists of a pump for supplying water to the steam generator, and when a switch is applied to power, the electric heater built into the steam generator is heated to generate steam, and steam is applied to the cleaning target area through the mop. It is made of a structure that can be injected.

그러나, 종래기술에 따른 일반적인 스팀청소기는 분사되는 스팀의 양이 항상 일정하고 그 온도가 상당히 고온임에 따라, 작동중에 움직임이 없는 상태로 방치되면 걸레에 축적되는 스팀이 재응결됨에 따라 바닥에 잔수가 남게 됨과 더불어, 바닥면이 합성수지 등의 재료로 만들어지는 장판으로 시공된 경우에 장판이 축적된 열에 의해 영구적으로 변형되는 등의 문제점이 있는 실정이다. However, since the amount of steam injected is always constant and the temperature is quite high, the conventional steam cleaner according to the prior art is placed on the floor as the steam accumulated in the mop is re-condensed when it is left unmoved during operation. In addition to the remaining number, there is a problem that the floor is permanently deformed by the accumulated heat when the floor is constructed of a floor made of a material such as synthetic resin.

상기한 바와 같은 종래기술의 문제점을 해결하기 위하여 발명한 것으로서,As invented to solve the problems of the prior art as described above,

본 발명은 청소작업을 수행하는 중에 움직임이 감지되지 않으면 스팀의 발생을 차단하고 이동속도의 변화에 따라 스팀의 분사량을 조절할 수 있도록 하는 스팀청소기를 제공하는 것을 목적으로 한다. An object of the present invention is to provide a steam cleaner that can block the generation of steam and adjust the injection amount of steam in accordance with the change of the moving speed if the movement is not detected during the cleaning operation.

상기한 목적을 달성하기 위한 본 발명은, 전원스위치; 물을 공급하기 위한 물통; 전기히터가 내장되어 물을 가열하는 방법으로 스팀을 발생시키는 스팀발생장치; 스팀발생장치와 물통을 연결하는 배관 상에 설치되어 스팀발생장치에 공급되는 물의 양을 조절하는 유량조절가능형 펌프; 움직임과 이동속도를 감지하는 운동감지센서; 및 전기히터, 유량조절가능형 펌프 및 운동감지센서와 전기적으로 연결되어, 운동감지센서에 의해 감지된 정보에 따라, 전기히터 및 유량조절가능형 펌프를 제어하기 위한 신호를 출력하는 제어부;를 포함하며, 상기 제어부는 상기 운동감지센서가 움직임이 없음을 감지한 경우, 상기 전기히터에 공급되는 전원을 차단하고 유량조절가능형 펌프를 폐쇄시키는 신호를 출력하는 것을 특징으로 한다.The present invention for achieving the above object, the power switch; A bucket for supplying water; A steam generator for generating steam by a method of heating water by embedding an electric heater; A flow rate adjustable pump installed on a pipe connecting the steam generator and the water tank to adjust the amount of water supplied to the steam generator; A motion sensor for detecting movement and speed; And a controller electrically connected to the electric heater, the flow rate adjustable pump, and the motion detection sensor, and outputting a signal for controlling the electric heater and the flow rate adjustable pump according to the information detected by the motion detection sensor. The control unit may output a signal for shutting off the power supplied to the electric heater and closing the flow rate control pump when the motion detection sensor detects no movement.

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그리고, 상기 제어부는 상기 운동감지센서가 감지한 이동속도에 비례하여, 상기 전기히터에 공급되는 전류 및 상기 유량조절가능형 펌프의 공급유량을 조절하는 신호를 출력하는 것을 특징으로 한다. The control unit outputs a signal for adjusting a current supplied to the electric heater and a supply flow rate of the flow rate adjustable pump in proportion to the movement speed detected by the motion detection sensor.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 더욱 상세하게 설명한다. Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

도 1 은 본 발명에 따른 스팀청소기를 개략적으로 도시한 구성도이다. 1 is a configuration diagram schematically showing a steam cleaner according to the present invention.

본 발명에 따른 스팀청소기는, 도 1에 도시한 바와 같이, 전원스위치, 물을 공급하기 위한 물통(10), 전기히터(35)가 내장되어 물을 가열하는 방법으로 스팀을 발생시키는 스팀발생장치(30)를 기본적으로 포함하며, 스팀발생장치(30)와 물통(10)을 연결하는 배관 상에 설치되어 스팀발생장치(30)에 공급되는 물의 양을 조절하는 유량조절가능형 펌프(20)와, 움직임과 이동속도를 감지하는 운동감지센서 및 전기히터(35)와 유량조절가능형 펌프(20) 및 운동감지센서와 전기적으로 연결되어, 운동감지센서에 의해 감지된 정보에 따라, 전기히터(35) 및 유량조절가능형 펌프(20)를 제어하기 위한 신호를 출력하는 제어부를 포함한다. Steam cleaner according to the present invention, as shown in Figure 1, a steam generator for generating steam by a method of heating the water is built-in the power switch, the bucket 10 for supplying water, the electric heater 35 It basically includes 30, the flow rate adjustable pump 20 is installed on the pipe connecting the steam generator 30 and the water tank 10 to adjust the amount of water supplied to the steam generator 30 And, electrically connected to the motion sensor and the electric heater 35 and the flow rate adjustable pump 20 and the motion sensor to detect the movement and the movement speed, according to the information detected by the motion sensor, the electric heater And a control unit for outputting a signal for controlling the flow regulating pump 20.

그리고, 제어부는 운동감지센서가 움직임이 없음을 감지한 경우, 전기히터(35)에 공급되는 전원을 차단하고 유량조절가능형 펌프(20)를 정지시키는 신호를 출력한다. When the motion sensor detects that there is no movement, the controller cuts off the power supplied to the electric heater 35 and outputs a signal to stop the flow rate adjustable pump 20.

또한, 제어부는 운동감지센서가 감지한 이동속도에 비례하여, 전기히터(35)에 공급되는 전류 및 유량조절가능형 펌프(20)의 공급유량을 조절하는 신호를 출력한다. In addition, the control unit outputs a signal for adjusting the current and the flow rate of the flow rate adjustable pump 20 is supplied to the electric heater 35 in proportion to the movement speed detected by the motion sensor.

구체적으로, 운동감지센서는 스팀청소기가 1차적으로 전원스위치가 'ON'으로 전환된 상태에서 청소용도로 사용되어 움직이고 있는지를 감지하고, 2차적으로 움직이고 있다면 그 이동속도가 어느 정도인지를 감지하는 역할을 수행하게 된다. Specifically, the motion sensor detects whether the steam cleaner is used for cleaning in a state in which the power switch is first switched to 'ON' and is moving, and if it is secondarily, detects the movement speed. Will be performed.

따라서, 만약 전원스위치를 통해 전원이 인가되는 도중에 스팀청소기가 움직 이지 않고 정지해 있는 것으로 감지되면, 제어부에 이와 같은 정보를 전달하게 되고, 제어부는 이와 같은 정보에 따라 스팀의 발생을 차단하기 위하여 전기히터(35)에 인가되던 전원을 차단하는 신호를 출력함과 더불어 물통(10)으로부터 스팀발생장치(30)로 공급되는 물을 차단하기 위하여 유량조절가능형 펌프(20)를 정지시키는 신호를 출력하게 되는 것이다. Therefore, if it is detected that the steam cleaner is stopped while the power is being applied through the power switch, the controller transmits such information to the controller, and the controller controls the electricity to block the generation of steam according to the information. In addition to outputting a signal to cut off the power applied to the heater 35, and outputs a signal to stop the flow rate adjustable pump 20 to cut off the water supplied from the water tank 10 to the steam generator 30 Will be done.

한편, 스팀청소기가 움직이는 가운데 그 이동속도에 따라 분사되는 스팀의 양을 조절하도록 한다. 즉, 스팀청소기의 이동속도에 따라 요구되는 최적의 스팀 량에 관한 정보를 제어부에 미리 입력해 둔 상태에서, 운동감지센서로부터 감지되는 이동속도에 관한 정보를 제어부가 입수하여, 제어부가 전기히터(35)에 인가되는 전류를 제어하는 신호를 출력하여 전기히터(35)에 의해 발열량을 조절할 수 있도록 함과 더불어 유량조절가능형 펌프(20)의 토출유량을 조절하는 신호를 출력하여 공급되는 물의 양을 제어함으로써, 스팀발생장치(30)에서 발생하여 분사되는 스팀의 양을 조절할 수 있도록 하는 것이다. On the other hand, while the steam cleaner is moving to adjust the amount of steam injected in accordance with the moving speed. That is, the controller obtains the information on the movement speed detected by the motion sensor in a state in which information on the optimum amount of steam required according to the movement speed of the steam cleaner is input in advance to the controller, and the controller obtains the electric heater ( The amount of water supplied by outputting a signal for controlling the current applied to the 35) to control the amount of heat generated by the electric heater 35 and to output a signal for adjusting the discharge flow rate of the flow rate adjustable pump 20. By controlling the, it is to be able to adjust the amount of steam generated by the steam generator 30 is injected.

물론, 스팀청소기의 이동속도가 고속인 경우에 많은 양의 스팀이 필요할 것이며, 이동속도가 저속인 경우에 적은 양의 스팀이 필요할 것임은 자명하다 하겠다. 즉, 이동속도에 비례하여 전기히터(35)의 발열량과 물통(10)으로부터 물 공급량을 제어하여 양적으로 최적의 스팀이 생성되고 분사될 수 있도록 하는 것이다. Of course, a large amount of steam will be required if the moving speed of the steam cleaner is a high speed, it will be obvious that a small amount of steam is required when the moving speed is a low speed. That is, by controlling the amount of heat of the electric heater 35 and the amount of water supply from the water tank 10 in proportion to the moving speed, the optimum steam can be generated and injected in a quantitative manner.

이상과 같은 본 발명에 따른 스팀청소기를 제공함으로써, 본 발명은 작동 중에 스팀청소기가 움직임이 없는 상태로 방치된다 하더라도 스팀이 계속 방출되어 스팀의 재응결로 인해 바닥에 잔수가 남게 되거나, 열이 축적되어 장판 등을 영구적으로 변형시키는 일이 발생하지 않도록 하며, 청소작업이 진행되는 중에도 이동속도에 따라 적정한 양의 스팀이 분사될 수 있도록 하여 청소기가 저속으로 움직일 때 부분적으로 잔수가 발생하지 않도록 함과 더불어 고속으로 움직일 때 스팀의 양이 부족하지 않도록 하여 청소효과를 극대화시킬 수 있도록 하는 효과를 얻을 수 있도록 한다. By providing the steam cleaner according to the present invention as described above, even if the steam cleaner is left unmoved during operation, the steam is continuously released, the residual water remains on the floor due to the re-condensation of steam, or heat is accumulated This prevents permanent deformation of floor coverings, etc., and ensures that an appropriate amount of steam is sprayed according to the moving speed even during the cleaning process so that no residual water is generated when the cleaner moves at low speed. In addition, it is possible to obtain the effect of maximizing the cleaning effect by not running out of steam when moving at high speed.

본 발명은 특정의 실시 예와 관련하여 도시 및 설명하였지만, 첨부 특허청구범위에 의해 나타난 발명의 사상 및 영역으로부터 벗어나지 않는 한도 내에서 다양한 변경 및 변화가 가능하다는 것을 당 업계에서 통상의 지식을 가진 자라면 누구나 쉽게 알 수 있을 것이다. While the invention has been shown and described with respect to specific embodiments thereof, those skilled in the art will recognize that various changes and modifications can be made without departing from the spirit and scope of the invention as set forth in the appended claims. Anyone can easily know.

Claims (3)

전원스위치;Power switch; 물을 공급하기 위한 물통;A bucket for supplying water; 전기히터가 내장되어 물을 가열하는 방법으로 스팀을 발생시키는 스팀발생장치;A steam generator for generating steam by a method of heating water by embedding an electric heater; 스팀발생장치와 물통을 연결하는 배관 상에 설치되어 스팀발생장치에 공급되는 물의 양을 조절하는 유량조절가능형 펌프;A flow rate adjustable pump installed on a pipe connecting the steam generator and the water tank to adjust the amount of water supplied to the steam generator; 움직임과 이동속도를 감지하는 운동감지센서; 및 A motion sensor for detecting movement and speed; And 전기히터, 유량조절가능형 펌프 및 운동감지센서와 전기적으로 연결되어, 운동감지센서에 의해 감지된 정보에 따라, 전기히터 및 유량조절가능형 펌프를 제어하기 위한 신호를 출력하는 제어부;를 포함하며, And a controller electrically connected to the electric heater, the flow rate adjustable pump and the motion detection sensor, and outputting a signal for controlling the electric heater and the flow rate adjustable pump according to the information detected by the motion detection sensor. , 상기 제어부는 상기 운동감지센서가 움직임이 없음을 감지한 경우, 상기 전기히터에 공급되는 전원을 차단하고 유량조절가능형 펌프를 정지시키는 신호를 출력하는 것을 특징으로 하는 스팀청소기.The control unit, when the motion sensor detects no movement, the steam cleaner characterized in that for outputting a signal to cut off the power supplied to the electric heater and stop the flow rate adjustable pump. 삭제delete 제 1항 있어서, The method of claim 1, 상기 제어부는 상기 운동감지센서가 감지한 이동속도에 비례하여, 상기 전기히터에 공급되는 전류 및 상기 유량조절가능형 펌프의 토출유량을 조절하는 신호를 출력하는 것을 특징으로 하는 스팀청소기.The control unit is a steam cleaner, characterized in that for outputting a signal for adjusting the discharge flow rate of the current and the flow rate adjustable pump supplied to the electric heater in proportion to the movement speed detected by the motion sensor.
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KR102553424B1 (en) 2023-03-08 2023-07-07 정길순 Floor cleaning system

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