US20190110653A1 - Vacuum cleaner - Google Patents
Vacuum cleaner Download PDFInfo
- Publication number
- US20190110653A1 US20190110653A1 US16/157,838 US201816157838A US2019110653A1 US 20190110653 A1 US20190110653 A1 US 20190110653A1 US 201816157838 A US201816157838 A US 201816157838A US 2019110653 A1 US2019110653 A1 US 2019110653A1
- Authority
- US
- United States
- Prior art keywords
- housing
- printed circuit
- circuit board
- vacuum cleaner
- pcb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- 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
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
-
- 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
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
-
- 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
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
- A47L9/2842—Suction motors or blowers
-
- 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
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
-
- 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
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/102—Dust separators
-
- 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
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2889—Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20154—Heat dissipaters coupled to components
- H05K7/20163—Heat dissipaters coupled to components the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
Definitions
- the present invention relates to a vacuum cleaner, and in particular to a vacuum cleaner having a printed circuit board.
- PCBs are widely used for electronic control in vacuum cleaners. There is a desire for PCBs to be as small as possible, yet reducing the size of a PCB may have associated disadvantages, such as, for example, a temperature increase during operation of the PCB.
- a vacuum cleaner comprising a main body, a motor-driven fan unit, a printed circuit board for controlling the motor-driven fan unit, and a housing encasing a portion of the printed circuit board, wherein a heat sink of the printed circuit board extends through the housing from an interior of the housing to an exterior of the housing, and the printed circuit board is disposed within the main body such that the heat sink is located in an air-flow path through the main body.
- the vacuum cleaner according to the first aspect of the present invention may be advantageous principally as the vacuum cleaner comprises a printed circuit board for controlling the motor-driven fan unit, and a housing encasing a portion of the printed circuit board, wherein a heat sink of the printed circuit board extends through the housing from an interior of the housing to an exterior of the housing, and the printed circuit board is disposed within the main body such that the heat sink is located in an air-flow path through the main body.
- the portion of the circuit board encased by the housing may be of a lower pollution degree than, for example, a portion of the printed circuit board not encased by a housing, as the housing may protect the encased portion of the printed circuit board from ingress of dust and debris and the like, as well as moisture.
- the encased portion of the printed circuit board may be of a lower pollution degree than a non-encased portion of a printed circuit board
- components mounted to the surface of the printed circuit board encased by the housing may be placed closer together than would typically be permissible for a higher pollution degree environment. This may enable a reduction in size of the printed circuit board, which may allow for more efficient packaging of the printed circuit board within the vacuum cleaner.
- the temperature inside the housing may rise to unacceptable levels in use, particularly where, for example, components mounted to a surface of the printed circuit board encased by the housing are placed closer together than would typically be the case.
- the provision of a heat sink extending from an interior of the housing to an exterior of the housing, and the printed circuit board being disposed within the main body such that the heat sink is located in an air-flow path through the main body may enable excess heat to be removed from the interior of the housing, thereby ensuring acceptable temperature levels within the housing in use.
- the housing may protect the components mounted therein from any dust or debris within the airflow.
- This may, for example, enable the printed circuit board to be exposed to a flow of untreated ambient air from an exterior of a vacuum cleaner to an interior of the vacuum cleaner, which may be beneficial as the untreated ambient air may have a lower temperature than, for example, air which has been worked on by a dirt separator and/or motor of the vacuum cleaner, and hence may have an enhanced cooling effect.
- PCBs are commonly known as PCBs, and the term PCB will be widely recognised by a person skilled in the art.
- Only a portion of the PCB may be encased by the housing, for example such that at least a portion of the PCB is not encased by the housing. This may be beneficial as the greater the area of the PCB that is encased by the housing, the larger the heat sink needed to regulate temperature within the housing.
- By only encasing a portion of the PCB with the housing it may be possible to maintain a low size of heat sink whilst still providing appropriate protection for certain components of the PCB, for example for surface mounted components of the PCB.
- the housing may extend from a surface of the PCB.
- a surface of the PCB and the housing may together define an enclosure, for example with the surface of the PCB being exposed to the interior of the enclosure.
- the housing may be mounted to a surface of the PCB, for example a surface of the PCB on which components are mounted.
- the housing may be mounted to a surface of the PCB at a region spaced from the perimeter of the PCB. This may be beneficial over, for example mounting the housing to the perimeter/edge of the PCB as this may remove the need for the housing to extend about the entirety of the perimeter/edge of the PCB and/or may provide for a simpler mounting of the housing, as this may remove the need to shape the housing to account for input terminals and the like.
- the housing may comprise a seal located at an interface between the housing and the PCB, for example such that the portion of the PCB encased by the housing is hermetically sealed. This may be beneficial as sealing the interface between the housing and the PCB may enable the region of the PCB in the interior of the housing to be a different pollution degree to the region of the PCB external to the housing.
- the portion of the PCB encased by the housing may comprise surface mounted components of the PCB. This may be beneficial as the surface mounted components may require smaller, if any, lead connections, and hence the structure of the housing to accommodate such connections may be relatively simple. Furthermore, surface mounted components may be located closer together than non-surface mounted components, and may therefore enable the use of a smaller housing and/or a smaller PCB.
- the portion of the PCB encased by the housing may comprise a different pollution degree, for example a lower pollution degree, to a portion of the PCB not encased by the housing. This may provide for a reduced total size of the PCB relative to a PCB without a housing and/or having a single pollution degree.
- the portion of the PCB encased by the housing may comprise a region of pollution degree 2 or 1.
- the vacuum cleaner may comprise a dirt separator, a first air inlet, a second air inlet, a first air flow path between the first air inlet and the dirt separator, and a second air flow path between the second air inlet and the motor-driven fan unit, and the PCB may be located in the second air flow path.
- This may be beneficial as air from the second air flow path may be cooler than air from the first air flow path, for example, air which has been worked on by the dirt separator in use, and so may provide enhanced cooling of the interior of the housing via interaction with the heat sink.
- the second air flow path may comprise an air flow path for untreated air.
- the second air inlet may be spaced apart from the first air inlet, and may, for example, be spaced apart from a surface to be cleaned in use.
- the second air inlet may be formed in the main body.
- the first air inlet may comprise a dirty air inlet, for example a dirty air inlet formed upstream of the dirt separator, and the dirty air inlet may be located in a region of a surface to be cleaned in use.
- the second air flow path may be at least partially generated by the motor-driven fan unit.
- the motor-driven fan unit may create a negative pressure within the main body which draws air from the exterior of the main body to the interior of the main body, for example via the second air inlet.
- the motor-driven fan unit may comprise at least one bleed, and, for example, the at least one bleed may be located pre- the motor of the motor driven fan unit.
- a printed circuit board for controlling a motor-driven fan unit, the printed circuit board comprising a housing encasing a portion of the printed circuit board, and a heat sink extending through the housing from an interior of the housing to an exterior of the housing.
- FIG. 1 is a side view of a disassembled vacuum cleaner according to a first aspect of the present invention
- FIG. 2 is a top plan view of a main body of the vacuum cleaner of FIG. 1 ;
- FIG. 3 is top plan view of the main body of FIG. 2 with an uppermost surface of the main body removed;
- FIG. 4 is a rotated view of the main body of FIG. 3 ;
- FIG. 5 is a perspective view of a printed circuit board (PCB) used in the vacuum cleaner of FIG. 1 ;
- PCB printed circuit board
- FIG. 6 is a first perspective view of the PCB of FIG. 5 with its housing removed;
- FIG. 7 is a second perspective view of the PCB of FIG. 5 with its housing removed.
- FIG. 1 A vacuum cleaner according to a first aspect of the present invention, generally designated 10 , is shown in FIG. 1 .
- the vacuum cleaner 10 comprises a main body 12 , a separating apparatus 14 , a flexible hose 16 , a wand assembly 18 , and a cleaner head 20 .
- the main body 12 is shown in isolation in FIGS. 2 to 4 .
- a motor-driven fan unit 114 for generating airflow through the separating apparatus 14 in use
- a cable rewind unit (not shown) for retracting and storing an electrical cable within the main body 12
- appropriate control electronics 118 for controlling the cylinder vacuum cleaner 10 .
- the motor-driven fan unit 114 and cable rewind unit are conventional, and will not be described here in any detail.
- the motor-driven fan unit 114 is housed in a motor bucket 115 .
- the motor bucket 115 is connected to the main body 12 so that the motor-driven fan unit 114 does not rotate as the cylinder vacuum cleaner 10 is manoeuvred over a floor surface to be cleaned in use.
- the motor bucket 115 has a plurality of bleeds 117 , and the plurality of bleeds 117 are located pre- the motor of the motor-driven fan unit 114 . In use, the plurality of bleeds 117 generate a negative pressure within the main body 12 , which acts to draw ambient air from the exterior of the main body 12 to the interior of the main body 12 , via vents 123 and/or a cable inlet 125 .
- the control electronics 118 comprise a PCB 122 according to the second aspect of the present invention, which is shown in FIGS. 5 to 7 .
- the PCB 122 comprises a substrate 124 , a plurality of components 126 mounted to the substrate 124 , a housing 128 , and a heat sink 130 .
- the housing 128 comprises a seal 132 , and is mounted to the surface of the substrate 124 such that surface-mounted components 126 of the PCB 122 are sealed within the housing 128 .
- the heat sink 130 extends from the interior of the housing 128 to the exterior of the housing 128 , and comprises a heat conductive metal plate.
- the region of the PCB 122 within the housing 128 is protected from moisture and dust, for example conductive dust.
- the region of the PCB 122 within the housing 128 can be a different pollution degree to the remainder of the PCB 122 , and in the presently preferred embodiment the interior of the housing 128 is of pollution degree 2, whilst the remainder of the PCB 122 external of the housing 128 is of pollution degree 3.
- the surface-mounted components 126 within the housing 128 can be placed closer together than, for example, if they were located exterior of the housing 128 in a region of pollution degree 3. This may enable the overall size of the PCB 122 to be reduced.
- the heat sink 130 extends outwardly from the housing 128 , and acts to regulate the temperature within the housing 128 by transferring heat from the interior of the housing 128 to the exterior of the housing 128 in use.
- the heat sink 130 extends outwardly from the housing 128 of the PCB 122 , and is positioned within the interior of the main body 12 such that at least a portion of airflow from the vents 123 and/or the cable inlet 125 toward the plurality of bleeds 117 in the motor bucket 115 passes over the heat sink 130 in use.
- An example airflow is shown by arrow A in FIG. 4 .
- the combination of the heat sink 130 and the cooling airflow acts to maintain the temperature within the housing 128 at acceptable levels during use.
Abstract
A vacuum cleaner has a main body, a motor-driven fan unit, a printed circuit board for controlling the motor-driven fan unit and a housing encasing a portion of the printed circuit board. A heat sink of the printed circuit board extends through the housing from an interior of the housing to an exterior of the housing. The printed circuit board is disposed within the main body such that the heat sink is located in an air-flow path through the main body.
Description
- This application claims the priority of United Kingdom Application No. 1716979.8, filed Oct. 16, 2017, the entire contents of which are incorporated herein by reference.
- The present invention relates to a vacuum cleaner, and in particular to a vacuum cleaner having a printed circuit board.
- Printed circuit boards, commonly known as PCBs, are widely used for electronic control in vacuum cleaners. There is a desire for PCBs to be as small as possible, yet reducing the size of a PCB may have associated disadvantages, such as, for example, a temperature increase during operation of the PCB.
- According to a first aspect of the present invention there is provided a vacuum cleaner comprising a main body, a motor-driven fan unit, a printed circuit board for controlling the motor-driven fan unit, and a housing encasing a portion of the printed circuit board, wherein a heat sink of the printed circuit board extends through the housing from an interior of the housing to an exterior of the housing, and the printed circuit board is disposed within the main body such that the heat sink is located in an air-flow path through the main body.
- The vacuum cleaner according to the first aspect of the present invention may be advantageous principally as the vacuum cleaner comprises a printed circuit board for controlling the motor-driven fan unit, and a housing encasing a portion of the printed circuit board, wherein a heat sink of the printed circuit board extends through the housing from an interior of the housing to an exterior of the housing, and the printed circuit board is disposed within the main body such that the heat sink is located in an air-flow path through the main body.
- In particular, as a portion of the printed circuit board is encased by the housing, the portion of the circuit board encased by the housing may be of a lower pollution degree than, for example, a portion of the printed circuit board not encased by a housing, as the housing may protect the encased portion of the printed circuit board from ingress of dust and debris and the like, as well as moisture.
- As the encased portion of the printed circuit board may be of a lower pollution degree than a non-encased portion of a printed circuit board, components mounted to the surface of the printed circuit board encased by the housing may be placed closer together than would typically be permissible for a higher pollution degree environment. This may enable a reduction in size of the printed circuit board, which may allow for more efficient packaging of the printed circuit board within the vacuum cleaner.
- However, as a portion of the printed circuit board is encased by the housing, the temperature inside the housing may rise to unacceptable levels in use, particularly where, for example, components mounted to a surface of the printed circuit board encased by the housing are placed closer together than would typically be the case. The provision of a heat sink extending from an interior of the housing to an exterior of the housing, and the printed circuit board being disposed within the main body such that the heat sink is located in an air-flow path through the main body, may enable excess heat to be removed from the interior of the housing, thereby ensuring acceptable temperature levels within the housing in use.
- Furthermore, as a portion of the printed circuit board is encased by the housing, it may be possible to place the printed circuit board in an untreated air flow path through the vacuum cleaner in use, for example an air flow path containing nominal amounts of dust or debris or the like, as the housing may protect the components mounted therein from any dust or debris within the airflow. This may, for example, enable the printed circuit board to be exposed to a flow of untreated ambient air from an exterior of a vacuum cleaner to an interior of the vacuum cleaner, which may be beneficial as the untreated ambient air may have a lower temperature than, for example, air which has been worked on by a dirt separator and/or motor of the vacuum cleaner, and hence may have an enhanced cooling effect.
- Printed circuit boards are commonly known as PCBs, and the term PCB will be widely recognised by a person skilled in the art.
- Only a portion of the PCB may be encased by the housing, for example such that at least a portion of the PCB is not encased by the housing. This may be beneficial as the greater the area of the PCB that is encased by the housing, the larger the heat sink needed to regulate temperature within the housing. By only encasing a portion of the PCB with the housing, it may be possible to maintain a low size of heat sink whilst still providing appropriate protection for certain components of the PCB, for example for surface mounted components of the PCB.
- The housing may extend from a surface of the PCB. A surface of the PCB and the housing may together define an enclosure, for example with the surface of the PCB being exposed to the interior of the enclosure. The housing may be mounted to a surface of the PCB, for example a surface of the PCB on which components are mounted. The housing may be mounted to a surface of the PCB at a region spaced from the perimeter of the PCB. This may be beneficial over, for example mounting the housing to the perimeter/edge of the PCB as this may remove the need for the housing to extend about the entirety of the perimeter/edge of the PCB and/or may provide for a simpler mounting of the housing, as this may remove the need to shape the housing to account for input terminals and the like.
- The housing may comprise a seal located at an interface between the housing and the PCB, for example such that the portion of the PCB encased by the housing is hermetically sealed. This may be beneficial as sealing the interface between the housing and the PCB may enable the region of the PCB in the interior of the housing to be a different pollution degree to the region of the PCB external to the housing.
- The portion of the PCB encased by the housing may comprise surface mounted components of the PCB. This may be beneficial as the surface mounted components may require smaller, if any, lead connections, and hence the structure of the housing to accommodate such connections may be relatively simple. Furthermore, surface mounted components may be located closer together than non-surface mounted components, and may therefore enable the use of a smaller housing and/or a smaller PCB.
- The portion of the PCB encased by the housing may comprise a different pollution degree, for example a lower pollution degree, to a portion of the PCB not encased by the housing. This may provide for a reduced total size of the PCB relative to a PCB without a housing and/or having a single pollution degree. The portion of the PCB encased by the housing may comprise a region of pollution degree 2 or 1.
- The vacuum cleaner may comprise a dirt separator, a first air inlet, a second air inlet, a first air flow path between the first air inlet and the dirt separator, and a second air flow path between the second air inlet and the motor-driven fan unit, and the PCB may be located in the second air flow path. This may be beneficial as air from the second air flow path may be cooler than air from the first air flow path, for example, air which has been worked on by the dirt separator in use, and so may provide enhanced cooling of the interior of the housing via interaction with the heat sink. The second air flow path may comprise an air flow path for untreated air. The second air inlet may be spaced apart from the first air inlet, and may, for example, be spaced apart from a surface to be cleaned in use. The second air inlet may be formed in the main body. The first air inlet may comprise a dirty air inlet, for example a dirty air inlet formed upstream of the dirt separator, and the dirty air inlet may be located in a region of a surface to be cleaned in use.
- The second air flow path may be at least partially generated by the motor-driven fan unit. The motor-driven fan unit may create a negative pressure within the main body which draws air from the exterior of the main body to the interior of the main body, for example via the second air inlet. The motor-driven fan unit may comprise at least one bleed, and, for example, the at least one bleed may be located pre- the motor of the motor driven fan unit.
- According to a second aspect of the present invention there is provided a printed circuit board for controlling a motor-driven fan unit, the printed circuit board comprising a housing encasing a portion of the printed circuit board, and a heat sink extending through the housing from an interior of the housing to an exterior of the housing.
- In order to better understand the present invention, and to show more clearly how the invention may be put into effect, the invention will now be described, by way of example, with reference to the following drawings:
-
FIG. 1 is a side view of a disassembled vacuum cleaner according to a first aspect of the present invention; -
FIG. 2 is a top plan view of a main body of the vacuum cleaner ofFIG. 1 ; -
FIG. 3 is top plan view of the main body ofFIG. 2 with an uppermost surface of the main body removed; -
FIG. 4 is a rotated view of the main body ofFIG. 3 ; -
FIG. 5 is a perspective view of a printed circuit board (PCB) used in the vacuum cleaner ofFIG. 1 ; -
FIG. 6 is a first perspective view of the PCB ofFIG. 5 with its housing removed; and -
FIG. 7 is a second perspective view of the PCB ofFIG. 5 with its housing removed. - A vacuum cleaner according to a first aspect of the present invention, generally designated 10, is shown in
FIG. 1 . - The
vacuum cleaner 10 comprises amain body 12, a separatingapparatus 14, aflexible hose 16, awand assembly 18, and acleaner head 20. Themain body 12 is shown in isolation inFIGS. 2 to 4 . - Mounted within the
main body 12 are a motor-drivenfan unit 114 for generating airflow through the separatingapparatus 14 in use, a cable rewind unit (not shown) for retracting and storing an electrical cable within themain body 12, andappropriate control electronics 118 for controlling thecylinder vacuum cleaner 10. - The motor-driven
fan unit 114 and cable rewind unit are conventional, and will not be described here in any detail. - The motor-driven
fan unit 114 is housed in amotor bucket 115. Themotor bucket 115 is connected to themain body 12 so that the motor-drivenfan unit 114 does not rotate as thecylinder vacuum cleaner 10 is manoeuvred over a floor surface to be cleaned in use. - The
motor bucket 115 has a plurality ofbleeds 117, and the plurality ofbleeds 117 are located pre- the motor of the motor-drivenfan unit 114. In use, the plurality ofbleeds 117 generate a negative pressure within themain body 12, which acts to draw ambient air from the exterior of themain body 12 to the interior of themain body 12, viavents 123 and/or acable inlet 125. - The
control electronics 118 comprise aPCB 122 according to the second aspect of the present invention, which is shown inFIGS. 5 to 7 . - The PCB 122 comprises a
substrate 124, a plurality ofcomponents 126 mounted to thesubstrate 124, ahousing 128, and aheat sink 130. - The
housing 128 comprises aseal 132, and is mounted to the surface of thesubstrate 124 such that surface-mountedcomponents 126 of thePCB 122 are sealed within thehousing 128. Theheat sink 130 extends from the interior of thehousing 128 to the exterior of thehousing 128, and comprises a heat conductive metal plate. - As the
housing 128 seals with the surface of thesubstrate 124, the region of thePCB 122 within thehousing 128 is protected from moisture and dust, for example conductive dust. Thus the region of thePCB 122 within thehousing 128 can be a different pollution degree to the remainder of thePCB 122, and in the presently preferred embodiment the interior of thehousing 128 is of pollution degree 2, whilst the remainder of thePCB 122 external of thehousing 128 is of pollution degree 3. - As the interior of the
housing 128 is of pollution degree 2, the surface-mountedcomponents 126 within thehousing 128 can be placed closer together than, for example, if they were located exterior of thehousing 128 in a region of pollution degree 3. This may enable the overall size of thePCB 122 to be reduced. - However, as the surface-mounted
components 126 are enclosed within thehousing 128, and as the distance between the surface-mountedcomponents 126 is reduced, the temperature within thehousing 128 can reach excessive levels during use. Theheat sink 130 extends outwardly from thehousing 128, and acts to regulate the temperature within thehousing 128 by transferring heat from the interior of thehousing 128 to the exterior of thehousing 128 in use. - The
heat sink 130 extends outwardly from thehousing 128 of thePCB 122, and is positioned within the interior of themain body 12 such that at least a portion of airflow from thevents 123 and/or thecable inlet 125 toward the plurality ofbleeds 117 in themotor bucket 115 passes over theheat sink 130 in use. An example airflow is shown by arrow A inFIG. 4 . The combination of theheat sink 130 and the cooling airflow acts to maintain the temperature within thehousing 128 at acceptable levels during use.
Claims (7)
1. A vacuum cleaner comprising a main body, a motor-driven fan unit, a printed circuit board for controlling the motor-driven fan unit, and a housing encasing a portion of the printed circuit board, wherein a heat sink of the printed circuit board extends through the housing from an interior of the housing to an exterior of the housing, and the printed circuit board is disposed within the main body such that the heat sink is located in an air-flow path through the main body.
2. The vacuum cleaner of claim 1 , wherein only a portion of the printed circuit board is encased by the housing.
3. The vacuum cleaner of claim 1 , wherein the housing is mounted to a surface of the printed circuit board at a region spaced from the perimeter of the printed circuit board.
4. The vacuum cleaner of claim 1 , wherein the housing comprises a seal located at an interface between the housing and the printed circuit board.
5. The vacuum cleaner of claim 1 , wherein the portion of the printed circuit board encased by the housing comprises surface mounted components of the printed circuit board.
6. The vacuum cleaner of claim 1 , wherein the portion of the printed circuit board encased by the housing comprises a lower pollution degree than a portion of the printed circuit board not encased by the housing.
7. The vacuum cleaner of claim 1 , wherein the vacuum cleaner comprises a dirt separator, a first air inlet, a second air inlet, a first air flow path between the first air inlet and the dirt separator, and a second air flow path between the second air inlet and the motor-driven fan unit, and the printed circuit board is located in the second air flow path.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1716979.8 | 2017-10-16 | ||
GB1716979.8A GB2567631A (en) | 2017-10-16 | 2017-10-16 | A vacuum cleaner |
Publications (1)
Publication Number | Publication Date |
---|---|
US20190110653A1 true US20190110653A1 (en) | 2019-04-18 |
Family
ID=60419113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/157,838 Abandoned US20190110653A1 (en) | 2017-10-16 | 2018-10-11 | Vacuum cleaner |
Country Status (5)
Country | Link |
---|---|
US (1) | US20190110653A1 (en) |
JP (1) | JP2019072488A (en) |
CN (1) | CN109662647A (en) |
GB (1) | GB2567631A (en) |
WO (1) | WO2019077298A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023051234A1 (en) * | 2021-09-28 | 2023-04-06 | 苏州简单有为科技有限公司 | Surface-cleaning apparatus |
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US20160037984A1 (en) * | 2014-08-11 | 2016-02-11 | Samsung Electronics Co., Ltd. | Vacuum cleaner |
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JP2547630B2 (en) * | 1988-12-19 | 1996-10-23 | 三洋電機株式会社 | Electric vacuum cleaner |
JPH0370534A (en) * | 1989-08-11 | 1991-03-26 | Sanyo Electric Co Ltd | Vacuum cleaner |
JPH0428317A (en) * | 1990-05-23 | 1992-01-30 | Tokyo Electric Co Ltd | Vacuum cleaner |
JPH04105630A (en) * | 1990-08-27 | 1992-04-07 | Sanyo Electric Co Ltd | Vacuum cleaner |
SE9503753D0 (en) * | 1995-10-25 | 1995-10-25 | Electrolux Ab | Device for a vacuum cleaner |
JP2002224003A (en) * | 2001-01-31 | 2002-08-13 | Toshiba Tec Corp | Vacuum cleaner |
CN100358456C (en) * | 2003-09-27 | 2008-01-02 | 乐金电子(天津)电器有限公司 | Heat radiation structure of vacuum cleaner |
KR100671891B1 (en) * | 2005-02-23 | 2007-01-24 | 주식회사 대우일렉트로닉스 | Parts chiller of vacuum cleaner |
US20090094783A1 (en) * | 2007-10-11 | 2009-04-16 | Dudderar Raymond P | Fiberglass cloth tape laminated fiberboard barrier |
KR101457434B1 (en) * | 2008-01-02 | 2014-11-06 | 삼성전자주식회사 | A cleaner |
-
2017
- 2017-10-16 GB GB1716979.8A patent/GB2567631A/en active Pending
-
2018
- 2018-09-21 WO PCT/GB2018/052696 patent/WO2019077298A1/en active Application Filing
- 2018-10-11 US US16/157,838 patent/US20190110653A1/en not_active Abandoned
- 2018-10-15 CN CN201811195882.6A patent/CN109662647A/en active Pending
- 2018-10-15 JP JP2018194144A patent/JP2019072488A/en active Pending
Patent Citations (2)
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US2453660A (en) * | 1944-07-28 | 1948-11-09 | Talon Inc | Slider for slide fasteners |
US20160037984A1 (en) * | 2014-08-11 | 2016-02-11 | Samsung Electronics Co., Ltd. | Vacuum cleaner |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023051234A1 (en) * | 2021-09-28 | 2023-04-06 | 苏州简单有为科技有限公司 | Surface-cleaning apparatus |
Also Published As
Publication number | Publication date |
---|---|
CN109662647A (en) | 2019-04-23 |
GB2567631A (en) | 2019-04-24 |
WO2019077298A1 (en) | 2019-04-25 |
JP2019072488A (en) | 2019-05-16 |
GB201716979D0 (en) | 2017-11-29 |
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