JP2020516803A - Air-cooled high-pressure washing device - Google Patents

Abstract

The present invention includes a housing (14) and a motor pump unit (76) having a motor (90) and a high pressure pump (92) driven by the motor (90), and disposed or formed in the housing (14). And at least one cooling air channel (46, 50) for cooling air for cooling said motor-pump unit (76), which is flow connected to the atmosphere via at least one housing opening (42, 44) And an air guide (78) that at least partially surrounds the motor pump unit (76) and is flow connected to the at least one cooling air channel (46, 50). A receiving space (48) defined by a base (74) and at least one further housing wall (38, 40, 56, 58, 68) is formed in the housing (14). Within (48), the air guides (78) are spaced from each other in the axial direction of the motor pump unit (76) by damping elements (126, 128; 148; 172, 176) on the housing (14). A high-pressure cleaning device supported by two bearing areas (110, 112) spaced apart by a distance. In order to provide an air-cooled high-pressure washing device of that kind, in which a better noise reduction is achieved, a first bearing area (110) is provided in which the air guide (78). Seats on the base (74) via at least one base damping element (126; 172) and at the first bearing area at least one additional damping element separate from the base damping element. It is proposed that a damping element (128; 176) is provided for supporting on said at least one further housing wall (38, 40).

Description

The invention comprises a housing, a motor and pump unit having a motor and a high pressure pump driven by the motor, and a flow connection to the atmosphere via at least one housing opening arranged or formed in the housing. At least one cooling air channel for cooling air for cooling the motor pump unit, and an air guide at least partially surrounding the motor pump unit and flow-connected to the at least one cooling air channel. An air-cooled high-pressure cleaning device in which a receiving space is defined in the housing, the receiving space being defined by a base and at least one further housing wall, in which the air guiding part is damped on the housing. Element relates to a high-pressure cleaning device, which is supported in two axially spaced-apart bearing areas in the motor-pump unit.

Water and air cooling systems are used to cool the high pressure washer. Although a water cooling system can achieve effective cooling of the motor pump unit, it requires more equipment costs than an air cooling system. In order to provide an effective air cooling system, the highest possible volumetric flow of cooling air should be supplied to the motor pump unit in a targeted manner. To this end, it is known to form in the housing at least one cooling air channel through which cooling air is supplied, for example from the atmosphere, to the motor-pump unit. The airborne noise due to the flow of cooling air and the structural noise due to the operating motor-pump unit lead to practically non-negligible operating noise radiation. It is desirable to keep noise emissions as low as possible in order to make working with the pressure washer as comfortable as possible for the user and to meet possible sound insulation requirements.

DE 41 06 955 A1 and DE 10 2008 009 246 A1 describe air-cooled high-pressure washers.

In a typical high-pressure cleaning device, an air guide is present, which at least partially surrounds the motor pump unit. Cooling air can flow through the at least one cooling air channel and the air guide, which ensures effective cooling of the motor-pump unit. At least one cooling air channel is provided, in particular a cooling air channel through which cooling air is supplied from the atmosphere to the air guide. Alternatively or additionally, it can be realized that the cooling air is discharged from the air guide via the cooling air channel into the atmosphere. Since at least one cooling air channel makes it possible to homogenize the cooling air flow, the noise emission can be kept as low as possible. Furthermore, damping elements, with which the air guides are supported on the housing, are provided in the two bearing areas. The damping element allows the air guide to be vibrationally isolated from the housing. It is possible to further reduce the noise radiation of the high-pressure washing device caused by the structure-borne sound due to the vibration isolation, and to realize a particularly quiet high-pressure washing device.

An air-cooled high-pressure washing device of that kind with cooling air channels and damping elements is described in the same applicant, in non-prepublished patent application DE 10 2015 117 079.5. This is actually proven. However, it would be desirable to achieve even more effective noise reduction in conventional high pressure washers.

DE 103 05 812 A1 describes an air-cooled high-pressure washing device. The high-pressure cleaning device includes a motor-pump unit including an electric motor and a high-pressure pump. The motor-pump unit is housed in a housing, which is completely lined on the inside with a shock-absorbing and sound-absorbing plastic material.

DE 41 06 955 A1 DE 10 2008 009 246 A1 DE 10 2015 117 079.5 DE 103 05 812 A1

The object of the invention is to provide an air-cooled high-pressure cleaning device of the type mentioned at the outset, which makes it possible to achieve better noise reduction.

According to the invention, the object is to provide, in a general air-cooled high-pressure cleaning device, a first bearing area, in which the air guide part is located on at least one base side on the base part. For seating via a damping element and for supporting in this first bearing region at least one further damping element separate from said base damping element on said at least one further housing wall It is achieved in that it is provided.

In the high-pressure cleaning device according to the invention, the support of the air guide on the housing can be carried out in a targeted manner. This makes it possible to considerably reduce the vibrations and thus the noise radiation from the high-pressure washing device resulting from the structure-borne sound. This proves to be advantageous in that there is at least one proximal damping element on which the air guide is seated, in the first bearing area. Vibrations can be dissipated in a targeted manner in the base of the receiving space and through the base to the underside of the high pressure washer, and thereby to the support surface for the high pressure washer. The first bearing region is provided with at least one further damping element for supporting on the at least one further housing wall, for example on the face wall of the receiving space. Surprisingly it is actually shown that by separating said damping elements from each other a significant noise reduction can be achieved. Since the load of the motor-pump unit is dissipated to the support surface substantially via the air guide and the base damping element, the at least one further damping element is substantially added on the further housing wall. Work to support it. This increases the stability of the high-pressure cleaning device according to the present invention and reduces the tendency to roll over.

It will be appreciated that position and orientation indications such as "base", "bottom", "top" or the like should be construed in relation to the position of use of the pressure washer. In the use position, the high-pressure cleaning device is self-supporting on a support surface by means of self-supporting elements. The support surface can be considered to be horizontally aligned. The touch surface defined by the high pressure cleaning device in the use position coincides with the contact surface defined by the support surface. "Axial" is currently to be understood in relation to the spreading direction of said motor-pump unit, unless further explained.

It can be realized that the at least one base damping element is seated on the base, for example forming a cushioning element between the air guide and the base.

In different types of advantageous embodiments, it can be realized that the at least one base damping element is seated on a pedestal-like area of the housing arranged on the base.

Preferably, a recess is present or formed on the base or on the pedestal-like area, which recess is adapted to the contour of the air guide. The air guide can be engaged in the recess via the at least one proximal damping element, preferably in a positive locking manner. As a result, between the air guide and the base or the pedestal-like area there is a large working area in which the load can be damped by the at least one base damping element and thus reliably dissipated to the base. Exists.

The pedestal-like area is preferably configured as a housing wall connecting the side walls of the receiving space to each other. The housing walls serve, for example, to reinforce the housing between the side walls. This can reduce the tendency of the housing to vibrate.

The base is formed, for example, by the bottom wall of the receiving space.

For example, cooling air channels of the high-pressure cleaning device can be provided on the side of the bottom wall remote from the receiving space. The bottom wall may form a wall configuration of the cooling air channel. As will be explained in more detail below, the cooling air channel may be located directly below the receiving space.

In an advantageous implementation of the high-pressure cleaning device according to the invention, the direction of action for supporting the air guide via the at least one proximal damping element is the at least one further one of the first bearing areas. An angle that is between about 60° and about 120° can be achieved with the direction of action for supporting via the damping element. Advantageously, the angle is about 90°. The floor cleaning device is supported downwardly via the at least one proximal damping element. The floor cleaning device can be supported laterally on the further housing wall in a direction transverse to the weight force, in particular perpendicularly, via at least one further damping element.

In particular, in combination with the last-mentioned advantageous embodiment of the high-pressure cleaning device, the air guide is arranged on the side wall of the receiving space in the first bearing region via the at least one further damping element. It is advantageous if supported. The side wall is in particular the outer wall of the housing.

It can be provided that on opposite sides of the air guide there are provided at least two further damping elements for supporting on opposite side walls of the receiving space. The air guide can be positively supported between the side walls, in particular between the outer walls of the housing, via at least one damping element, which air guide can be separated from the housing with respect to vibration. Downward support in the direction towards the base and the support surface is provided via the at least one base damping element. The damping elements are separated from one another so that an effective noise reduction can be achieved.

It can be realized in particular that two further damping elements are provided on each side of the air guide.

The at least one further damping element is preferably housed in a positive locking manner in at least one receiver on the at least one further housing wall or on the air guide. This makes it possible to ensure that the damping element is held in place on the further housing wall or on the air guide, whereby a structurally simple form can be achieved at the same time.

In an advantageous embodiment, two further damping elements can be arranged in the receptacle, it being possible to achieve engagement of a projecting element in the middle of the damping element. The receiver is arranged, for example, on the side wall of the receiving space and the projecting element is arranged on the air guide, but the reverse positioning is also possible. By supporting the projecting element on the damping element, not only radial support of the air guide but also its axial support is possible, which allows additional vibration isolation.

The at least one proximal damping element and/or the at least one further damping element are, for example, in strip-like or block-like form. This advantageously provides the damping element as a lean strip or block, which allows the damping element to be manufactured in an inexpensive manner.

The at least one proximal damping element and the at least one further damping element in the first bearing area are preferably axially co-located or approximately co-located.

According to an advantageous implementation of the high-pressure cleaning device, the first bearing area is preferably arranged on the front side of the air guide, the air guide axially on the housing wall on the at least one base damping element. And/or it is realized to be supported via said at least one further damping element. This allows axial support on the housing wall in addition to the radial support of the air guide. Thereby, the axial vibration of the air guide portion can be weakened via the damping element.

In an advantageous embodiment of the high-pressure cleaning device, at least one damping element is arranged on the front side of the air guide, the air guide being axially on the housing wall via the at least one damping element. It is preferable to be supported. In order to damp axial vibrations, in addition to the damping element arranged in the first bearing area, at least one further damping element for axial support on the housing wall can be provided. The at least one further damping element serves to directly or indirectly support the air guide on the base or on the at least one further housing wall of the receiving space mentioned at the beginning. You can also

The air guide can be axially supported, for example, on a face wall of the receiving space. The face walls are, for example, aligned particularly perpendicular to the axial direction in a direction intersecting with the axial direction.

It can be realized that the first bearing area is arranged downstream of the second bearing area with respect to the air flow in the air guide.

The first bearing area is advantageously arranged at or near the outlet opening for the cooling air of the air guide.

Alternatively or additionally, the second bearing area can be arranged at or near the inlet opening for the cooling air of the air guide.

It will be appreciated that the housing preferably has or forms in the second bearing region a housing wall on which the air guide is supported via at least one damping element. The housing wall is preferably constructed particularly perpendicular to the axial direction. The housing wall can advantageously be a housing wall connecting the side walls of the receiving space. This reinforces the housing and reduces the tendency of the housing to vibrate.

The housing wall is preferably configured as an intermediate wall or face wall of the receiving space which connects the side walls of the receiving space.

The contour of the housing wall in the second bearing area is preferably adapted to the contour of the air guide. In this way, the air guide can be connected to the housing wall in a positive locking manner and supported on the housing wall via the at least one damping element. Vibrations can be reliably dissipated to the housing wall. The air guide passes, for example, through an opening in the housing wall.

The at least one damping element is, for example, in the form of an annular or annular segment and surrounds the air guide at least partially, preferably completely. The damping portion extends over a predetermined angular range, for example, in the circumferential direction of the shaft of the motor pump unit. For example, there are two damping elements, each of which covers a half angle.

The at least one damping element is preferably in the form of a strip. Thereby, the damping element is preferably formed so as to be provided without waste, which makes it cheap to manufacture.

A sealing of the cooling air channel or of the area of the housing which is flow-connected to the cooling air channel to the receiving space or the area of the receiving space takes place in the second bearing region via the at least one damping element. It is advantageous to be This has the possibility, for example, that the cooling air channel and the air guide can lead into each other through an opening in the air guide, saving a separate seal at the edge of the opening. give. This opening can be an inlet opening or an outlet opening of the air guide. In order to ensure the air flow through the air guide, the at least one damping element can provide a sealing function in addition to a damping function.

Advantageously, the air guide does not come into direct contact with the housing and/or with the wall arrangement of the at least one cooling air channel. In this way, vibrations of the air guide are not directly transmitted to the housing, in particular to the wall arrangement of the at least one cooling air channel. Instead, the damping element is effective in damping vibrations of the air guide.

Accordingly, it is preferred that the motor-pump unit does not come into direct contact with the housing and/or with the wall arrangement of the at least one cooling air channel.

The air guide preferably extends over the entire length or substantially the entire length of the motor-pump unit. This makes it possible to ensure a defined cooling air flow over the entire length of the motor-pump unit or almost over it. Disposing individual areas of the motor-pump unit, such as the pump head, pump input, or pump output on the front side of the motor-pump unit, wholly or partly outside the air guide. You can

The air guide surrounds the motor-pump unit in the form of an outer shell and the at least one air guide channel and the air guide are into each other, at least on one end side, particularly on the front side. And preferably has an opening communicating therethrough. The air guide can surround the motor-pump unit on all sides in the circumferential direction, and for this purpose can have, for example, a cylindrical or substantially cylindrical form. Suitably, at least one end side, in particular at least one of the front sides of the air guides, has a flow connection between the interior of the air guides and the interior of the at least one cooling air channel. There is an opening through which there is a certainty.

A sealing element may be provided on the edge of the at least one opening. However, as explained above, a sealing element can be saved if, for example, a sealing is provided by the at least one damping element in the second bearing area.

Advantageously, said motor-pump unit comprises a fan wheel driven by the shaft of said motor, said fan wheel being arranged in the opening of said air guide and carrying cooling air on said motor-pump unit. The fan wheel is positioned, for example, on the front opening and constantly conveys the cooling air through the air guide onto the motor and the pump. In this way, effective cooling of the motor pump unit can be ensured.

It can be realized that the pump input duct and/or the pump output duct are fed from the air guide through its end openings or that the pump head of the high-pressure pump passes through the openings. Cleaning liquid to the pump input duct for supplying the cleaning liquid to be placed under pressure and/or the pump output duct for the cleaning liquid to be placed under pressure, for example through the opening of the air guide and through the cooling air channel Can be fed in and out of the housing.

The pump input duct and/or the pump output duct can pass through a housing opening, and a damping element is arranged between the pump input duct and/or the pump output duct and the housing opening. The cushioning element may be disposed at a distance from the housing while contacting the pump input duct or the pump output duct.

In a different type of embodiment, it is possible to realize that the pump input duct and/or the pump output duct are pumped laterally from the air guide, for example in a direction transverse to the axial direction. ..

In the case of strip-shaped or block-shaped damping elements, it is advantageous if the housing is constructed from a housing half-shell, as will be described subsequently. Each damping element can be positioned on the housing half-shell. As a result, the motor-pump unit can be installed in the housing half-shell together with the air guide surrounding the motor-pump unit. Subsequently positioning said further housing half-shell with said further damping element arranged on this further housing half-shell on said first housing half-shell and joining with said first housing half-shell. You can This allows the assembly of the high-pressure cleaning device to be carried out in a particularly simple manner.

The damping element is made of, for example, a rubber material or a plastic material. The damping element can be made to be foam-like. It is conceivable to use damping elements made of polyurethane material. Foam damping elements that are closed and/or open cells can be used.

After opening the housing, it can be realized that the damping element is removable, in particular manually removable. This simplifies the replacement of damping elements of the high-pressure washing device over the years, which makes it possible to further maintain the quiet operation of the high-pressure washing device.

The at least one cooling air channel is preferably formed at least in part between an outer wall of the housing and at least one further channel wall contained or formed by the housing at a distance from the outer wall. To be done. This allows the at least one cooling air channel to be integrally formed by the housing. In order to thereby simplify the design of the at least one cooling air channel, the outer wall can at least partly form the wall configuration of the cooling air channel.

The at least one further channel wall preferably does not contact the damping element. Possible vibrations that are not absorbed by the damping element are thereby not directly transmitted to the channel wall.

In different types of advantageous embodiments, it may be realized that the bottom wall or the top wall of the receiving space is a channel wall of a cooling air channel arranged below or above, respectively, as explained above. ..

The at least one cooling air channel runs in the longitudinal direction of the high pressure cleaning device with a channel area and preferably extends over its entire width or substantially the entire width in the cross direction of the high pressure cleaning device. The at least one cooling air channel can in particular extend over the entire length of the high-pressure cleaning device or substantially over it. In this way, the high-pressure cleaning device can have a compact construction.

Advantageously, the at least one cooling air channel is lined at least in part on the inside with a sound absorbing material. With said sound absorbing material, noise radiation can be further reduced, for example with a foam material. In particular, it is possible to absorb the sound from the motor pump unit. The sound absorbing material further attenuates flow noise from the cooling air in the cooling air channel.

The sound absorbing material can be arranged, for example, between a tongue-like housing projection and the housing wall. This allows a simple mounting of the sound absorbing material, which can be manually inserted into the intermediate space between the housing projection and the housing wall and thereby fixed.

The at least one cooling air channel may be lined on the inside with only one channel wall by the sound absorbing material. It is also possible that the sound absorbing material is arranged on mutually opposite channel walls.

In an advantageous embodiment of the high-pressure cleaning device according to the invention, the at least one cooling air channel is configured in an angled manner and the cooling air flowing through the at least one cooling air channel is at least a single diversion. Receive. In fact, it is shown that at least a single turn can reduce the noise emission due to the air flow. The at least one cooling air channel is lined with a sound absorbing material, preferably in the area of bending. Due to the bending, the cooling air is preferably redirected at about 90°.

The motor-pump unit is advantageously oriented parallel to a channel section of the at least one cooling-air channel, the cooling air flowing through the channel section and the air guide preferably being twice in each case. It preferably undergoes a turning of about 90°. Therefore, the cooling air flowing through the channel area and the air guide can flow in mutually opposite directions. This allows for a relatively long air stream inside the housing with a compact construction of the high pressure washer, and a significant noise reduction is achieved. In this embodiment, the cooling air preferably circulates through the at least one cooling air channel and the air guide along approximately a U-shape, the cooling air channel having a L-shaped cross-section, for example. be able to.

The high-pressure cleaning device may have a first cooling air channel and a second cooling air channel, and is capable of supplying cooling air from the atmosphere to the motor pump unit through the first cooling air channel. Cooling air can be discharged from the motor pump unit into the atmosphere through the cooling air channel. The air guide is preferably an opening through which the first cooling air channel leads into the air guide and through which the air guide leads into the second cooling air channel. Respectively on the opposite end sides, particularly on the front side.

The motor pump unit and the air guide are arranged between channel sections of the first and second cooling air channels running parallel to the motor pump unit, the cooling air being the first cooling air channel, the It is preferable that the air guide portion and the second cooling air channel meander and meander at a right angle. The diverting of the cooling air occurs multiple times, meandering at right angles, in particular along the "S-shape" or the "angled S-shape". In the construction of the high-pressure cleaning device, which is also compact, it can be ensured that the cooling air stream is relatively long for effective cooling and the lowest possible noise emission.

Advantageously, the channel section of the first cooling air channel is arranged above the motor pump unit and the channel section of the second cooling air channel is arranged below the motor pump unit. Alternatively, the channel sections of the cooling channels may each be located laterally next to the motor pump unit.

Housing openings and housing openings are preferably arranged on opposite sides on the housing, cooling air entering the first cooling air channel via the former housing openings and cooling via the latter housing openings. Air exits the second cooling air channel. This makes it possible to avoid the heated cooling air exiting the second cooling air channel from directly entering the first cooling air channel. This makes it possible to largely avoid the loss of cooling effect. If possible, the housing openings can be arranged at maximum distance from one another on the high pressure cleaning device.

Further, a housing opening through which cooling air enters into the first cooling air channel is provided, through which cooling air exits from the second cooling air channel, with respect to the height direction of the high pressure cleaning device. Advantageously, it is positioned above the housing opening in which it runs.

In particular, the housing opening for admitting cooling air into the first cooling air channel is arranged on the upper side of the high-pressure cleaning device. In this way, foreign matter or dust particles are drawn into the first cooling air channel only with a relatively low probability. This is particularly advantageous when positioning the high pressure cleaning device on the ground surface.

It turns out to be advantageous if the motor-pump unit is oriented horizontally in the housing, and in this case the ground surface is also recognized as horizontal. The above-mentioned channel sections of the first cooling air channel and/or the second cooling air channel, which are preferably above and below the motor-pump unit, are also preferably horizontally oriented.

The first cooling air channel and/or the second cooling air channel may have further channel sections, in particular when the respective cooling air channels have an L-shaped cross-section, the further channel sections are vertical. It can be oriented.

Advantageously, the housing has two housing halves, the motor pump unit being positioned between the housing halves together with the air guide surrounding the motor pump unit. This allows the assembly of the high-pressure cleaning device to be carried out in a simple manner.

For example, the high pressure pump is an axial piston pump.

The housing preferably has at least one housing wall with a reinforcing structure. A stiffening structure may be provided, for example, on the side wall of the housing. The reinforcing structure can be, for example, a honeycomb structure or a cross rib structure.

In order to further explain the present invention, preferred embodiments of the present invention will be described subsequently with reference to the drawings.

1 is a perspective view of an air-cooled high-pressure cleaning device according to the present invention. The perspective view of the high-pressure washing|cleaning apparatus of FIG. 1 after removing the left housing half shell. The high pressure cleaning device of FIG. 2 after removing the motor pump unit and the air guide. FIG. 3 is a plan view of the high-pressure cleaning device according to the invention from the inside to the left housing half-shell in different types of embodiments. FIG. 5 is a view corresponding to FIG. 4 in a further embodiment of the high pressure cleaning device according to the present invention. FIG. 5 is a cross-sectional view of a further embodiment of a high pressure washer according to the present invention, taken along the line AA in FIG. 4. FIG. 5 is a cross-sectional view of a further embodiment of a high pressure washer according to the present invention, taken along the line AA in FIG. 4. FIG. 5 is a sectional view of a further embodiment of a high pressure cleaning device according to the present invention, taken along line BB in FIG. 4.

FIG. 1 shows an advantageous embodiment of a high-pressure cleaning device according to the invention, which is considered as reference numeral 10. The high pressure cleaning device 10 is positioned on the support surface 12. The support surface 12 can be recognized, for example, as being horizontally aligned. The high-pressure cleaning device 10 is an air-cooled type, and as described below, cooling air is sucked from the atmosphere, passes through the high-pressure cleaning device 10, and is then discharged into the atmosphere again.

The high pressure washer 10 includes a housing 14 with an upper side 16 on which an upper wall 18 is located and a lower side 20 on which a lower wall 22 is located. A self-supporting element 24 for self-supporting on the support surface 12 is arranged on the lower wall 22. This causes the touch surface defined by the self-supporting element 12 to coincide with the contact surface of the support surface 12.

Indications of position and orientation, such as "top", "bottom", or the like, should currently be construed with respect to the position of use of the pressure washer 10 on the support surface 12.

The housing 14 has a front wall 28 on the front side 26 and a rear wall 32 on the back side 30. The housing 14 has a left side wall 36 on the left side 34 and a right side wall 40 on the right side 38.

The walls 18, 22, 28, 32, 36, and 40 are outer walls of the housing 14. These walls are also housing walls. To the extent that the walls of the housing 14 are considered below, a wall is a wall included in or formed by the housing 14 and thus a “housing wall”.

Located in the transition region from the front wall 28 to the top wall 18 is an inlet opening 42 through which cooling air can enter from the atmosphere into the housing 14. Disposed within the transition region from the rear wall 32 to the lower wall 22 is an outlet opening 44 through which cooling air can exit from the housing 14 into the atmosphere. The inlet opening 42 is arranged substantially above the outlet opening 44 in the height direction and on the side facing each other in the longitudinal direction of the high-pressure cleaning device 10.

The housing 14 is subdivided therein into three substantially larger areas: a cooling air channel 46 for supplying air, a receiving space 48, and a cooling air channel 50 for discharging air.

The upper cooling air channel 46 is defined by the second section 64 of the front wall 28, the top wall 18, and subsequently the channel wall 60, and laterally by the upper section of the side walls 36, 40. Within the housing 14 is provided a channel wall 52 of the housing 14 located at a distance from the outer wall, and a first section 54 is provided at a second end spaced from the lower end of the front wall 28. Starting at zone 56, the second zone extends at a distance from the top wall 18 and at a distance from the first zone. A second section 56 is adjoined by a third section 58, which extends downwards close to the altitude of the outlet opening 44.

The lower cooling air channel 50 is defined by the lower wall 22, the rear wall 32 of the first section 54 remote from the front wall 28, and laterally by the lower section of the side walls 36, 40. Within the housing, the cooling air channel 50 is approximately parallel to the lower wall 22 in a first section 62 and is spaced from the lower wall by the channel wall 60 of the housing 14 and at a distance from the rear wall 32 approximately the upper wall 18. It is defined by a second section 64 extending arcuately. The second section 64 is connected to the third section 58 via the intermediate wall 66.

The receiving space 48 is defined by the second section 56 at the top, the third section 58 and the intermediate wall 66 at the rear, the areas of the first section 62 and section 64 at the bottom, and the face wall 68 at the front. The face wall 68 extends from the side wall 36 to the side wall 40 in the height direction over about half of the receiving space 48.

A recess 70 in the face wall 68 is formed in the center of the housing 14. The facing surface wall of the receiving space 48 is formed by the third section 58. The third section 58 has an opening 72.

The second section 64 forms the base 74, in particular the bottom wall of the receiving space 48.

The high-pressure cleaning device 10 includes a motor pump unit 76 and an air guide portion 78 that largely surrounds the motor pump unit. Both the motor pump unit 76 and the air guide 78 are largely housed within and supported within the receiving space 48 as described below. The motor-pump unit 76 is aligned parallel to the touch surface of the self-supporting element 24 and is oriented in the direction of travel of the high-pressure washing device 10, so that the shaft 80 of the motor-pump unit 76 runs in the longitudinal direction of the high-pressure washing device.

In order to effectively cool the motor pump unit 76, the motor pump unit 76 and the air guide 78 are arranged between the cooling air channels 46, 50 and through the housing via the cooling air channels 46, 50 of the cooling air. It is made possible to meander. Cooling air enters the cooling air channel 46 through the inlet opening 42 and flows in the direction of arrow 82. The cooling air is redirected twice in the cooling air channel 46, in each case by approximately 90°, and enters the air guide 78. The cooling air exits the air guide 78 at its opposite end and is redirected twice by substantially about 90°. Cooling air flows through the cooling air channel 50 in the direction of arrow 84 and exits the housing via the outlet opening 44.

To reduce noise, the cooling air channels 46, 50 are lined on the inside, in part by sound absorbing material. There is sound absorbing material in the form of strips 86, which are arranged in the cooling air channel 46 on the upper wall 18 and on the second zone 64. The strips 86 are arranged in the cooling air channel 50 on the side of the first zone 54 facing the receiving space 48, on the first zone 62 and on the lower region of the second zone 64. The strip 86 currently refers to an element of sound absorbing material.

The sound absorbing material, currently in the form of a foam material, dampens noise emissions as a result of air movement within the cooling air channel 46 and within the cooling air channel 50. It is already sufficient now that the cooling air channels 46, 50 are lined with sound absorbing material along the channel walls. It is also possible to realize that the cooling air channels 46 and/or 50 are lined with sound absorbing material on the channel walls facing each other.

Tongue-like protruding elements 88 are present on the housing 14 for simple assembly, at a distance from one another in the direction of travel of the cooling air channels 46, 50 (as can be seen, for example, in FIGS. 4-8). .. The strip 86 is inserted between the protruding element 88 and the respective channel wall.

The motor pump unit 76 includes a motor 90, an electric motor currently, and a high pressure pump 92 in the form of a flange mounted axial piston pump. In FIG. 2, a motor 90 and a high pressure pump 92 are schematically depicted in the air guide 78. On the left of FIG. 2, the pump head 94 can be seen outside the air guide 78. The high-pressure pump 92 projects with the pump head 94 from the receiving space 48 towards the front side 26.

A pump input duct 96 projects from the housing 14 through the area 54 and an opening formed in the front wall 28. A damping dampening element 98 in the form of a disc mounted on the pump input duct 96 damps the transmission of vibrations from the pump input duct 96 to the housing 14. In a corresponding manner, the pump output duct 100 projects from the housing 14 through the first section 54 and the opening formed in the front wall 28. A damping element 102 in the form of a damping disc mounted on the pump output duct 100 damps its vibrations relative to the housing 14. The dampening elements 98 and 102 are located at some distance from the edge of the housing opening.

The air guide 78 has on the front side an inlet opening 104 pointing towards the air guide channel 46, by means of which it is in flow connection with the cooling air channel 46. In order to avoid transmission of vibrations from the air guide 78 to the third zone 58, the inlet opening 104 is adjacent to the opening 72 and at a minimum distance from the opening.

Facing toward the face wall 68, the air guide 78 has an outlet opening 106 through which the air guide 78 is in flow connection with the cooling air channel 50. The outlet opening 106 is at a distance from the face wall 68 to avoid the transmission of vibrations from the air guide 78 to the face wall 68.

To convey cooling air through the cooling air channels 46, 50 and the air guide 78, the motor pump unit 78 includes a fan wheel 108 located at the inlet opening 104 and driven by the shaft of the motor 90.

In order to keep the noise emission from the high-pressure cleaning device 10 as low as possible, the air guide 78 is separated from the housing 14 with respect to vibrations as much as possible. Structurally propagated sound due to vibration of the motor pump unit 76 is absorbed via the damping element and thus damped to such an extent that the vibration is transmitted to the housing 14 only to a limited extent. The high-pressure cleaning device 10 becomes particularly quiet and easy to use.

A first bearing area 110 and a second bearing area 112 are provided for bearing the air guide 78 with the motor pump unit housed in the air guide and for supporting it with respect to the housing 14.

The first bearing area 110 is arranged near the outlet end of the air guide 78 with the outlet opening 106. Therefore, the first bearing area 110 is arranged downstream of the second bearing area 112 with respect to the air flow in the air guide 78. The second bearing area 112 is arranged near the inlet end with the inlet opening 104 of the air guide 78.

Located in the first bearing area 110 is a pedestal-like area 114 of the housing 14. The pedestal-like area 114 is configured as a housing wall 116 that connects the side wall 36 and the side wall 40 in an intersecting direction with respect to the axis 80. A concave depression 118 is formed on the pedestal-like area 114 on the top side. The contour of the depression 118 is adapted to the contour of the air guide 78. The housing wall 116 is currently a double-walled or triple-walled structure with wall configurations 120, 122 with an intermediate space 124 disposed between the wall configurations 120, 122. The housing wall 116 is located on top of the base 74 and is connected to the base.

At least one proximal damping element 126 is inserted in the intermediate space 124. Presently, two base damping elements 126 are provided, the two base damping elements 126 being joined together substantially without a gap and each extending over an angular range of about 30° in the circumferential direction of the axis 80. The damping element 126 projects radially inwardly beyond the housing wall 116.

The air guide 78 can be seated on the damping element 126. This introduces the weight force of the air guide 78 with the motor pump unit 76 into the base 74 and into the self-supporting element 24. In this way, the substantial loading of the air guide 78 and the motor pump unit 76 leans on the damping element 126 through which the air guide 78 is supported on the pedestal-like area 114. This effectively damps the vibrations and directs them into the support surface 12.

Disposed in the first bearing area 110 is a further damping element 128 for supporting the air guide 78 on a housing wall different from the base 74. In particular, on the mutually opposite sides of the air guide 78 there are at least one damping element 128 in each case and at present two in each case. The air guide 78 is supported on each side on the left side wall 36 and the right side wall 40 via two damping elements 128, respectively.

The damping elements 128 are housed in their respective receivers 130 axially spaced from one another in a positive locking manner. The receiver 130 is formed inside the sidewalls 36, 40. The air guides 78 engage on each side with the pin-shaped projection elements 132 into the respective intermediate spaces between the damping elements 128.

The downward working direction of the support on the base damping element 126 is angularly aligned with the support of the air guide 78 via the damping element 128 on the side walls 36, 40. In particular, the angle is currently about 90°. While the substantial load of the air guide 78 with the motor pump unit 76 is directed downwards to the base 74, the damping element 128 additionally serves to fix laterally. The damping element 128 also proves to be advantageous for fall safety purposes.

As a consequence of the engagement of the protruding element 132 on the damping element 128, axial support of the air guide 78 can be further achieved in the first bearing area 110.

The housing 14 has a housing wall 134 at a second bearing region 112 that is axially spaced from the first bearing region 110. The housing wall 134 is aligned transversely to the axis 80 and extends from the left side wall 36 to the right side wall 40 and from the base 74 to the second section 56.

Formed in the housing wall 134 is an opening 136, the contour of the opening 136 adapted to the contour of the air guide 78. The housing wall 134 divides the receiving space 48 into a first space area 138 and a second space area 140. The first space area 138 extends from the housing wall 134 to the third area 58, and the second space area 140 extends from the housing wall 134 to the face wall 68.

The housing wall 134 is a double wall construction with wall configurations 142, 144, with an intermediate space 124 between these wall configurations.

At least one damping element 148 is inserted in the intermediate space 146. At present, two ring-shaped damping elements 148 are provided, each of which extends over an angular range of about 180° in the circumferential direction of the shaft 80 and is together substantially without gaps. To be joined. The damping element 148 projects radially inwardly beyond the housing wall 134.

The air guide 78 can be reliably supported on the housing wall 134 via the damping element 148. The vibrations are effectively damped via the damping element 148 and are only weakened before they are transmitted to the housing 14. This significantly reduces the noise emission of the high pressure cleaning device 10.

Furthermore, the damping element 148 serves to seal the receiving space 48. This advantageously causes the damping element 148 to abut the air guide 78, for example on radial projections, for example on circular sections or on strips. In particular, the second space area 140 is closed off to the first space area in flow connection with the cooling air channel 46.

On the inlet side, the distance between the opening in the third zone 58 and the inlet opening 104 of the air guide 78 is small, so that cooling air can enter the first space zone 138. The seal via the damping element 148 ensures that cooling air does not flow over the air guide 78. Instead, the cooling air flows from the cooling air channel 46 through the substantial air guide 78.

The damping elements 126, 128 and 148 are each in the form of a strip. As a result of the simple structural form, the damping elements 126, 128, 148 can be provided with virtually no waste, which makes them cheap to manufacture.

To simply assemble the high pressure washer 10, the damping elements 126, 148 can be manually shaped as they are inserted into the housing 14.

The housing 14 is a half-shell housing including a left first housing half-shell 150 and a right second housing half-shell 152. In order to assemble the high pressure cleaning device 10, the half shells 150, 152 may first be equipped with damping elements. Then, the pump set including the motor pump unit 76 and the air guide portion 78 is introduced into the housing 14. The base damping element 126 and part of the damping elements 128, 148 have already been inserted. Then, each other part of the damping element is installed on the pump set or on the housing half-shell, and the housing is closed with the respective other housing half-shell 152, 150.

It is understood that walls extending transversely to the longitudinal direction of the housing 14 (eg, channel wall 52, channel wall 60, housing walls 116, 134) are formed together by both housing half-shells 150, 152. ..

4 and 5 each show a left housing half-shell 150 of a preferred embodiment of an air-cooled high pressure washer according to the present invention. FIG. 4 depicts that the housing 14 is provided on the inside with a reinforcing structure 154 for reinforcement. The reinforcing structure 154 is a honeycomb structure 156. Corresponding reinforcement structures can be provided on all housing walls. This is shown in FIG. 4 by the example of the side wall 36. It is understood that the stiffening structure 154 can also be located on the right housing half shell.

The same applies to the housing half-shell 150 according to FIG. 5 of a further advantageous embodiment of the high-pressure cleaning device according to the invention. This provides the reinforcement structure 154, which includes cross ribs 158 that run diagonally across the sidewall 36.

FIG. 4 is further symbolized by section lines AA and BB showing in place the other types of cross-sections shown in FIGS. 6, 7 and 8 of an advantageous embodiment of the high pressure cleaning device according to the invention. Be converted. That is, an independent advantageous implementation, depicted in FIGS. 6 and 7 through a receiver 130 and a protruding element 132, and in FIG. 8 by a sectional view in a position running on that side facing the receiving space 48 near the face wall 68. The morphology is shown in FIGS. 6, 7 and 8.

The same reference numbers are used for similar or functionally equivalent features and parts of the pressure washer 10 and the pressure washer described below. Only consider substantial differences.

In the high-pressure cleaning device 160 according to FIG. 6, a recess 162 is formed in the base 74 in the first bearing area 110, instead of the pedestal-shaped area 114. The contour of the depression 162 is concave and conforms to the contour of the air guide portion 78. A damping element 126 is installed in the recess 162.

The air guide 78 is supported directly on the base 74 via the damping element 126.

The high pressure cleaning device 165 according to FIG. 7 differs from the high pressure cleaning device 160 in that the damping elements 126 are not joined together. The damping elements 126 have an angular distance from each other. Nevertheless, also in the high-pressure cleaning device 165, the base-side support via the damping element 126 can be performed directly on the base 74.

The damping element 126 in the pressure washers 160 and 165 has a smaller extent for the angular range around the axis 80 than in the pressure washer 10. For example, the damping elements 126 both extend over an angular range of approximately 30°, and in the case of the high-pressure cleaning device 165 according to FIG. 7, there is an angular distance between the damping elements 126, for example 10°.

In the high-pressure cleaning device 170 according to FIG. 8, the first bearing area 110 is configured differently compared to the high-pressure cleaning device 10.

Instead of the pedestal-shaped section 14 and the damping element 126, a block-shaped base damping element 172 is provided, which seats the base damping element 172 directly on the base 74. The damping element 172 is housed in a positive locking manner, for example, in a receptacle 174 on the upper side of the base 74.

Furthermore, the damping element 172 can be supported axially on the face wall 68 and on the front side of the air guide 78, thereby additionally achieving axial support of the air guide and additional vibration damping. You can

In a corresponding manner, in the first bearing area 110, a damping element 176 is provided instead of the damping element 128, the damping element 176 being in a positive-locking manner at the respective receptacle 178 formed by the side walls 36, 40. Accommodated in. Damping element 176 functionally corresponds to damping element 128. Although deviating from the view according to FIG. 8, the damping elements 176 can also have the same dimensions.

A damping element 176 can also be supported on the face wall 68 and on the front side of the air guide 78 in the axial direction to provide additional damping in the axial direction.

It can be realized that the front support of the air guide 78 on the housing wall, for example the face wall 68, is also present in the high-pressure cleaning device 10, 160, or 165. In this case, at least one damping element is used, for example one or more damping elements 172 and 176.

Claims (33)

A housing (14),
A motor pump unit (76) having a motor (90) and a high pressure pump (92) driven by the motor (90);
For cooling air for cooling the motor-pump unit (76), which is arranged or formed in the housing (14) and is connected to the atmosphere via at least one housing opening (42, 44). At least one cooling air channel (46, 50);
An air-cooled high pressure washer comprising at least partially surrounding the motor pump unit (76) and including an air guide (78) flow connected to the at least one cooling air channel (46, 50),
Within said housing (14) is formed a receiving space (48) defined by a base (74) and at least one further housing wall (38, 40, 56, 58, 68), said receiving space (48). ), the air guides (78) are spaced from each other in the axial direction of the motor-pump unit (76) by damping elements (126, 128; 148; 172, 176) on the housing (14). In a high-pressure cleaning device, which is supported by two bearing areas (110, 112) that are spaced apart from each other,
A first bearing area (110) is provided,
In the first bearing area, the air guide (78) sits on the base (74) via at least one base damping element (126; 172),
In the first bearing region, at least one further damping element (128; 176) separate from the proximal damping element for supporting on the at least one further housing wall (38, 40) To be provided,
High-pressure cleaning device characterized by. The high-pressure cleaning device according to claim 1, wherein
The at least one base damping element (126; 172) seats on the base (74), or
Seating the at least one proximal damping element (126; 172) on a pedestal-like section (114) of the housing located on the base (74);
High-pressure cleaning device characterized by. The high pressure cleaning apparatus of claim 2, wherein a recessed depression (118; 162) is present or formed on the base (74) or on the pedestal-like area (114), the depression (118; 162). 162) High-pressure cleaning device, characterized in that 162) is adapted to the contour of said air guide (78). The high-pressure cleaning device according to claim 2 or 3, wherein the pedestal-like area (114) is configured as a housing wall (116) connecting the side walls (38, 40) of the receiving space (48) to each other. A high-pressure cleaning device characterized by: The high pressure washing apparatus according to any one of claims 1 to 4, wherein the base (74) is formed by a bottom wall of the receiving space (48). The high-pressure cleaning device according to any one of claims 1 to 5, wherein the air guide (78) is supported via the at least one base damping element (126; 172). The direction is between about 60° and about 120° with respect to the working direction for supporting in the first bearing area (110) via the at least one further damping element (128; 176). Form an angle that is about 90°. The high-pressure washing device according to any one of claims 1 to 6, wherein the air guide portion (78) in the first bearing region (110) is a side wall (38) of the receiving space (48). , 40) supported via said at least one further damping element (128; 176). 8. High-pressure cleaning device according to claim 7, wherein at least two further damping elements (128; 176) are provided on opposite sides of the air guide (78) in the receiving space (48). For supporting on side walls (38, 40) facing each other, in particular two additional damping elements (148) are provided on each side of said air guide (78). High pressure washing device. High-pressure cleaning device according to any one of the preceding claims, wherein the at least one further damping element (128; 176) is on the at least one further housing wall (38, 40). Or in at least one receiver (130; 176) on said air guide (78), housed in a positive locking manner. High-pressure cleaning device according to any one of claims 1 to 9, characterized in that said at least one proximal damping element (126; 172) and/or said at least one further damping element (128; 176). , A strip-like or block-like form. The high-pressure cleaning device according to any one of claims 1 to 10,
The first bearing area (110) is arranged on the front side of the air guide (78), and the air guide is axially on the housing wall, in particular the face wall of the receiving space (48). (68) supported via said at least one proximal damping element (172) and/or said at least one further damping element (176);
High-pressure cleaning device characterized by. The high-pressure washing device according to any one of claims 1 to 11, wherein the first bearing area (110) is the second bearing area (112) with respect to the air flow in the air guide (78). Is disposed downstream of the high pressure cleaning device. The high-pressure cleaning device according to any one of claims 1 to 12,
The first bearing area (110) is arranged at or near the outlet opening (106) for cooling air of the air guide (78), and/or the second bearing area (112). Is located at or near the inlet opening (104) for the cooling air of the air guide (78),
High-pressure cleaning device characterized by. The high-pressure cleaning device according to any one of claims 1 to 13, wherein the air guide (78) of the housing (14) is supported via at least one damping element (148). High-pressure cleaning device, characterized in that it has or forms a housing wall (134) in said second bearing area (112). The high pressure cleaning device according to any one of claims 1 to 14, wherein the housing wall (134) connects the side walls (38, 40) of the receiving space (48) to each other. ), which is configured as an intermediate wall or a face wall. The high-pressure washing device according to any one of claims 1 to 15, wherein the contour of the housing wall (134) in the second bearing area (112) is the contour of the air guide (78). The high-pressure cleaning device is characterized by being adapted. The high-pressure cleaning device according to any one of claims 1 to 16,
Said at least one damping element (148) is in the form of an annular or ring-shaped section and surrounds said air guide (78) at least partially, preferably completely or substantially completely, and/or Said at least one damping element (148) is in the form of a strip,
High-pressure cleaning device characterized by. 18. The high-pressure cleaning device according to any one of claims 1 to 17, wherein the receiving of a cooling air channel (46) or of an area (138) of the housing (14) flow connected to the cooling air channel. High-pressure cleaning, characterized in that a seal against the space (48) or the area (140) of the receiving space is made in the second bearing area (112) via the at least one damping element (148). apparatus. The high-pressure cleaning device according to any one of claims 1 to 18, wherein the air guide (78) is connected to the housing (14) and/or the at least one cooling air channel (46, 50). High pressure cleaning device, characterized in that it does not come into direct contact with the wall structure of. 20. The high pressure cleaning device according to any one of claims 1 to 19, characterized in that the air guide (78) extends over the entire length or substantially the entire length of the motor pump unit (76). High-pressure washing device. 21. High-pressure cleaning device according to any one of claims 1 to 20, wherein the air guide (78) surrounds the motor pump unit (76) in the form of an outer shell and at least one end. The at least one cooling air, which has an opening (104, 106) on the part side, especially on the front side, and is formed separately from the air guiding part (78) via the opening (104, 106). High pressure cleaning device, characterized in that channels (46, 50) and said air guide (78) communicate into each other. 22. The high pressure washer according to claim 21, wherein the motor pump unit (76) is driven by the shaft of the motor (90) and is arranged in the opening (104) of the air guide (78). A high-pressure washing device comprising a fan wheel (108) for conveying cooling air on the motor pump unit (76). The high-pressure cleaning device according to claim 21 or 22, wherein
A pump input duct (96) and/or a pump output duct (100) is fed from the air guide through an end opening (106) of the air guide (78), or
A pump head (94) of the high pressure pump (92) passing through the opening (106);
High-pressure cleaning device characterized by. The high-pressure cleaning device according to any one of claims 1 to 23,
A pump input duct (96) and/or a pump output duct (100) pass through the housing opening,
Damping elements (98, 102) are arranged between the pump input duct (96) and/or the pump output duct (100) and the housing opening.
High-pressure cleaning device characterized by. 25. A high pressure washer according to any one of claims 1 to 24, wherein the at least one cooling air channel (46, 50) is at least in part an outer wall (18, 22) of the housing (14). , 28, 32) and at least one further channel wall (52, 60) included or formed by the housing (14) at a distance from the outer wall (18, 22, 28, 32). A high-pressure cleaning device, characterized in that it is formed between them. 26. High-pressure cleaning device according to any one of claims 1 to 25, wherein the at least one cooling air channel (46, 50) comprises the high-pressure cleaning device (10; 160; 165; 170) in a channel area. ) In the longitudinal direction and extending in the cross direction of the high pressure cleaning device (10; 160; 165; 170) over the entire width or almost the entire width of the high pressure cleaning device (10; 160; 165; 170). High pressure cleaning device. 27. A high pressure cleaning apparatus according to any one of claims 1 to 26, wherein the at least one cooling air channel (46, 50) is lined, at least in part, with a sound absorbing material. Characteristic high pressure cleaning device. 28. The high-pressure washing device according to claim 27, characterized in that the sound-absorbing material is arranged between a tongue-like housing projection (88) and the housing wall. The high-pressure cleaning device according to any one of claims 1 to 28,
The at least one cooling air channel (46, 50) is configured in an angled manner, and the cooling air flowing through the at least one cooling air channel (46, 50) is preferably about 90. A high pressure washer characterized in that it undergoes at least a single change of direction of °. 30. The high pressure cleaning device according to any one of claims 1 to 29, wherein the high pressure cleaning device (10; 160; 165; 170) supplies cooling air from the atmosphere to the motor pump unit (76). High pressure having a first cooling air channel (46) capable of and a second cooling air channel (50) capable of discharging cooling air from the motor pump unit (76) into the atmosphere. Cleaning device. 31. The high pressure washer according to any one of claims 1 to 30, wherein the motor pump unit (76) is oriented horizontally within the housing (14). .. The high-pressure washing apparatus according to any one of claims 1 to 31, wherein the high-pressure pump (92) is an axial piston pump. 33. A high pressure washer according to any one of claims 1 to 32, wherein the housing (14) has at least one housing wall (38,40) with a reinforcing structure (154). High-pressure cleaning device characterized by.

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