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DE-102024132924-A1 - suction device

DE102024132924A1DE 102024132924 A1DE102024132924 A1DE 102024132924A1DE-102024132924-A1

Abstract

The invention relates to a vacuum device comprising a suction blower (2) for drawing in dust, dust particles and/or similar objects for cleaning purposes, an electric motor (3) for driving the suction blower (2), a battery (4) for supplying the electric motor (3) with electrical energy, a control unit (8) for controlling the vacuum device (1), a cooling air blower (5) for drawing in cooling air to cool the electric motor (3), and an outer housing (6) in which the suction blower (2), the electric motor (3), the battery (4), the control unit (8), and the cooling air blower (5) are arranged. The cooling air blower (5) is designed separately from the suction blower (2) and can be driven by the electric motor (3). The outer housing (6) has a motor cooling air opening (20) for the entry of cooling air to cool the electric motor (3), through which the cooling air fan (5) draws in cooling air for cooling the electric motor (3) along a motor cooling air path (21). The outer housing (6) also has a control cooling air opening (30) for the entry of cooling air to cool the control unit (8), through which the cooling air fan (5) draws in cooling air for cooling the control unit (8) along a control cooling air path (31). The control cooling air path (31) leads from the control cooling air opening (30) to the control unit (8) and from the control unit (8) onward to the electric motor (3) and has a first control cooling air section (32) that extends from the control cooling air opening (30) to the control unit (8). The entire first control cooling air section (32) is separate from the motor cooling air path (21).

Inventors

  • Christian Krauer
  • Mario Dieterich

Assignees

  • ANDREAS STIHL AG & CO. KG

Dates

Publication Date
20260513
Application Date
20241111

Claims (10)

  1. The vacuum device comprises: - a suction blower (2) for suctioning dust, dust particles and/or similar objects for cleaning purposes, - an electric motor (3) for driving the suction blower (2), - a battery (4) for supplying the electric motor (3) with electrical energy, - a control unit (8) for controlling the vacuum device (1), - a cooling air blower (5) for drawing in cooling air to cool the electric motor (3), and - an outer housing (6) in which the suction blower (2), the electric motor (3), the battery (4), the control unit (8), and the cooling air blower (5) are arranged, wherein the cooling air blower (5) is designed separately from the suction blower (2), wherein the cooling air blower (5) can be driven by the electric motor (3), wherein the outer housing (6) has a motor cooling air opening (20) for the inlet of cooling air to cool the electric motor (3), wherein the The suction device (1) is designed such that the cooling air blower (5) draws in cooling air for the electric motor (3) through the motor cooling air opening (20) along a motor cooling air path (21), characterized in that the outer housing (6) has a control cooling air opening (30) for the inlet of cooling air for cooling the control unit (8), that the suction device (1) is designed such that the cooling air blower (5) draws in cooling air for the control unit (8) through the control cooling air opening (30) along a control cooling air path (31), that the control cooling air path (31) leads from the control cooling air opening (30) to the control unit (8) and from the control unit (8) further to the electric motor (3), that the control cooling air path (31) has a first control cooling air section (32) which extends from the control cooling air opening (30) to the control unit (8), and that the entire first The control cooling air section (32) is designed to be separate from the engine cooling air path (21).
  2. suction device after Claim 1 , characterized in that the control cooling air path (31) has a second control cooling air section (33) which extends from the control unit (8) to the electric motor (3), and that the motor cooling air path (21) and the second control cooling air section (33) have a common section.
  3. suction device after Claim 1 or 2 , characterized in that the vacuum device (1) has a battery compartment (9) for the battery (4), and that the control unit (8) is arranged on the battery compartment (9).
  4. suction device after one of the Claims 1 until 3 , characterized in that the cooling air from the control cooling air opening (30) for cooling the battery (4) flows only through the first control cooling air section (32) of the control cooling air path (31).
  5. suction device after one of the Claims 1 until 4 , characterized in that the battery (4) has a bottom surface (7) which, when the suction device (1) is placed on the horizontal plane in the position provided for this purpose, points towards the horizontal plane, and that the control cooling air path (31) leads along the bottom surface (7) of the battery (4), and in particular that the control unit (8) is arranged on the bottom surface (7) of the battery (3).
  6. suction device after Claim 5 , characterized in that the cooling air flows around the control unit (8), in particular the battery (4) and/or the battery compartment (9), on several sides along the path of the control cooling air path (31).
  7. suction device after Claim 5 or 6 , that the motor cooling air path (21) in the section between the motor cooling air opening (20) and the electric motor (3) is arranged completely above the underside (7) of the battery (4), in particular above a bottom (12) of the battery compartment (9), when the suction device (1) is placed on the horizontal plane in the position provided for this purpose.
  8. suction device after one of the Claims 1 until 7 , characterized in that the length of the control cooling air path (31) from the control cooling air opening (30) to the cooling air blower (5) is greater than the length of the engine cooling air path (21) from the engine cooling air opening (20) to the cooling air blower (5).
  9. suction device after one of the Claims 1 until 8 , characterized in that the area of the engine cooling air opening (20) is larger than the area of the control cooling air opening (30), and in particular that the area of the engine cooling air opening (20) is at least 200% of the area of the control cooling air opening (30).
  10. suction device after one of the Claims 1 until 9 , characterized in that the area of the engine cooling air opening (20) is greater than 3000 mm² , and in particular that the area of the engine cooling air opening (20) is less than 6000 mm² .

Description

The invention relates to a suction device according to the preamble of claim 1. The control unit of such an electric vacuum cleaner must be protected from high temperatures during operation. The invention is based on the objective of further developing a generic suction device in such a way that excessive heating of the control unit is reliably avoided. This problem is solved by a suction device having the features of claim 1. Electric vacuum cleaners of this type feature a cooling fan to draw in cooling air for the electric motor. Cooling air can enter through a motor cooling air opening in the outer housing of the electric vacuum cleaner and is drawn in by the cooling fan along a motor cooling air path. The invention is based on the understanding that the cooling air for cooling the battery and/or the control unit must not have already been heated during the cooling of the electric motor in order to achieve efficient cooling of the battery and/or the control unit. A further understanding of the invention is that the air volume flow rates required for cooling the electric motor and those required for cooling the control unit and/or the battery differ. Based on this finding, the invention provides that the outer housing has a control cooling air opening for the intake of cooling air to cool the control unit, and that the suction device is designed such that the cooling air blower draws in cooling air for cooling the control unit through the control cooling air opening along a control cooling air path. The control cooling air path leads from the control cooling air opening to the control unit and from the control unit to the electric motor. The control cooling air path has a first control cooling air section. This first section extends from the control cooling air inlet to the control unit. Specifically, the first section extends precisely from the cooling air inlet to the control unit. The first section ends at the control unit. Therefore, the first section does not extend beyond the control unit. The entire first section is separate from the motor cooling air path. Because the entire first section is separate from the motor cooling air path, the volume flow of the cooling air for the control unit can be adjusted to the cooling requirements of the control unit and/or the battery by appropriately dimensioning the first section. Since the first section extends from the control cooling air inlet to the control unit, and the electric motor has not yet been exposed to the cooling air drawn in through the control cooling air inlet in this section, it is ensured that the cooling air for the control unit is not unnecessarily heated by the electric motor. This allows the control unit to be cooled efficiently and reliably. This reliably prevents the control unit from reaching excessively high temperatures. In particular, the control cooling air path has a second control cooling air section that extends from the control unit to the electric motor. Specifically, the second control cooling air section extends precisely from the control unit to the electric motor. Specifically, the motor cooling air path and the second control cooling air section share a common section. This allows the cooling air used to cool the control unit to be easily supplied to the cooling air blower. This allows the cooling air used to cool the control unit to flow to the electric motor and be used there for further cooling. As a result, a larger volume of cooling air is available for cooling the electric motor. In particular, the vacuum cleaner has a battery compartment for the battery. The control unit is specifically located at the battery compartment, and in particular, directly adjacent to it. This allows the control unit to be easily held within the vacuum cleaner. Due to its location at the battery compartment, and especially directly adjacent to it, the control unit and the battery compartment, and in particular the battery itself, can be easily cooled together. Specifically, the cooling air flowing from the control air intake to cool the battery only passes through the first section of the control air path. In other words, the cooling air passes through the battery on its way from the control air intake to the control unit. This ensures that the battery, and especially the battery compartment, is cooled by air that has not been previously heated by the control unit or the electric motor. This allows for efficient cooling of the battery, particularly the battery compartment. The battery, and in particular the battery compartment, has an underside that faces the horizontal plane when the vacuum cleaner is placed in its designated position. The cooling air path, in particular, runs along the underside of the battery, and in particular the battery compartment. The control unit is specifically located on the underside of the battery, and in particular the battery compartment. This allows the underside of the battery compartment, and in partic