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
  • A47L9/20—Means for cleaning filters

Definitions

• the present invention concerns a means for cleaning filters in wet and dry vacuum cleaners, said means consisting of at least one motor provided with a filter, in conjunction with the vacuum cleaner, and which draws the liquid, dust or equivalent matter into the tank of the vacuum cleaner.
• a drawback of this kind of vacuum cleaners of prior art is that cleaning of the filters is carried out either by disposal or by manual cleaning. This is either expensive or unhygienic.
• the object of the present invention is to provide a new kind of means for cleaning the filters in wet and dry vacuum cleaners.
• the means of the invention is characterized in that for cleaning purposes a blowing circulation can be produced through the filter, opposite in direction to the normal direction in which the air passes through, using the own motor of the vacuum cleaner.
• cleaning of the filters is substantially faster, and less handling of dust and refuse is required. The cleaning which takes place faster and with greater ease increases the effectiveness of the means in the working environment.
• An advantageous embodiment of the invention in which the vacuum cleaner has two motors, each provided with a filter, is characterized in that in the suction air exit port of the vacuum cleaner there is a shut-off valve known in itself in the art, by closing which and operating only one motor a cleaning blowing circulation can be produced in the filter associated with the other motor. Since the vacuum cleaner is very often provided with two motors, the cleaning blowing circulation of the invention is therefore easy to accomplish. This is a solution which is not only reliable in operation but also advantageous.
• Another embodiment of the invention wherein the vacuum cleaner has one motor with filter, is characterized in that in the duct between the filter and the motor has been inserted an auxiliary filter, provided with a shut-off valve, and another by-pass duct, provided with a shut-off valve, leading to the exhaust air space, whereby in the filter can be produced a cleaning blowing circulation by opening the shut-off valves.
• This is another embodiment, which is likewise reliable in operation and applicable on vacuum cleaner types having one motor of which the direction of blowing cannot be changed.
• Figs 1-4 present the means according to one embodiment.
• Figs 5-6 present the means of another embodiment.
• a two-motor vacuum cleaner is shown in normal use.
• the filter on motor A is being cleaned and motor B is running, and the shut-off valve 6 is closed to the exhaust air.
• Fig. 3 the filter on motor B is being cleaned and motor A is running, and the shut-off valve 6 is closed to the exhaust air.
• Fig. 4 depicts the cleaning of the filter on motor A, but forced circulation is in use because the intake port 13 is closed and the shut-off valve 6 is closed. The same cleaning system operates even more efficiently when the number of motors is increased.
• Fig. 5 shows a single-motor vacuum cleaner in normal use with the valve 22 of the auxiliary filter 19 closed and the valve 21 in the by-pass tube closed.
• the exhaust valve 16 is open.
• Fig. 6 depicts the cleaning of the filter of a single-motor vacuum cleaner through an auxiliary filter 19.
• the shut-off valve 26 of the main filter 20 is closed and the valve 16 in the exhaust pipe is closed.
• the shut-off valve 22 of the auxiliary filter 19 is open and the shut-off valve 21 is open. By these functions, an efficient forced circulation is achieved.
• the shut-off valve is controlled by one push rod 17.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Electric Suction Cleaners (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)
• Filters For Electric Vacuum Cleaners (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8518230

Family Applications (1)

Country Status (6)

Cited By (21)

Families Citing this family (8)

Citations (4)

• 1983
  • 1983-12-16 FI FI834633A patent/FI71660C/fi not_active IP Right Cessation
• 1984
  • 1984-02-21 IT IT49305/84A patent/IT1178293B/it active
  • 1984-12-14 EP EP85900117A patent/EP0197036B1/en not_active Expired
  • 1984-12-14 DE DE8585900117T patent/DE3481476D1/de not_active Expired - Lifetime
  • 1984-12-14 WO PCT/FI1984/000095 patent/WO1985002528A1/en active IP Right Grant
  • 1984-12-14 CA CA000470227A patent/CA1260212A/en not_active Expired

Patent Citations (4)

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