WO2024028034A1 - Motorpumpeneinheit für ein hochdruckreinigungsgerät - Google Patents
Motorpumpeneinheit für ein hochdruckreinigungsgerät Download PDFInfo
- Publication number
- WO2024028034A1 WO2024028034A1 PCT/EP2023/068573 EP2023068573W WO2024028034A1 WO 2024028034 A1 WO2024028034 A1 WO 2024028034A1 EP 2023068573 W EP2023068573 W EP 2023068573W WO 2024028034 A1 WO2024028034 A1 WO 2024028034A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inlet
- pump unit
- pump
- outlet
- motor pump
- 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.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/06—Mobile combinations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
Definitions
- the invention relates to a motor pump unit for a high-pressure cleaning device, comprising an electric motor which has a cooling channel, a pump which has a pump inlet and a pump outlet, and a suction connection for providing cleaning liquid to be pressurized, the suction connection being connected via the cooling channel to the pump inlet is in flow connection.
- a cleaning liquid preferably water
- a high-pressure hose can be connected to the pump outlet, for example, which carries a spray gun or a spray lance at its free end.
- a supply line can be connected to the suction connection, for example a suction hose.
- Cleaning liquid can be provided to the pump via the supply line and the suction connection.
- the cleaning liquid can already be under a pre-pressure of a few bars. This can be the case, for example, if water from a public water supply network is used as the cleaning liquid.
- An operating mode of the motor pump unit in which the pump is provided with cleaning fluid under pre-pressure is usually referred to as “pressure operation”.
- the pump can also suck in cleaning liquid from a supply, for example from a collecting container or a body of water. Such a mode of operation is commonly referred to as “suction mode”.
- the suction connection is in fluid communication with the pump inlet via the cooling channel of the electric motor. This allows the electric motor to be cooled by first passing cleaning fluid through the cooling channel and only then flows into the pump.
- the cooling channel as well as any coupling pieces and connecting lines via which the cleaning liquid is provided to the cooling channel form a not inconsiderable flow resistance.
- the flow resistance when using a powerful pump for example when using a pump with a delivery rate of more than 1000 liters per hour, can lead to a bottleneck in the supply of cleaning fluid and, as a result, to unstable running behavior of the pump.
- the object of the present invention is therefore to develop a motor pump unit of the type mentioned in such a way that stable running behavior of the pump can be ensured even in suction operation, even when a powerful pump is used, and the electric motor can be effectively cooled.
- a motor pump unit of the generic type in that the motor pump unit has a distribution device arranged upstream of the pump inlet for dividing the cleaning liquid, with part of the cleaning liquid being able to be fed to the pump inlet via the cooling channel and the remaining part of the cleaning liquid being bypassed to the pump inlet of the cooling channel can be supplied.
- the cleaning liquid is divided into a first part, which is initially used to cool the electric motor and then flows into the pump, and a second part, which bypasses the cooling channel directly into the pump flows in.
- the electric motor can be cooled effectively, even if the cooling channel forms a not inconsiderable flow resistance
- a very powerful pump can also be supplied with sufficient liquid not only in pressure mode but also in suction mode, without from the second Partial considerable flow resistances have to be overcome. This means that both effective cooling of the electric motor and stable running behavior of the pump can be ensured even in suction mode, even if the pump has a high delivery rate.
- the provision of the distribution device also has the advantage that the starting behavior of the pump can be improved, since air bubbles present at the start of operation can be broken down within a very short time without all air bubbles first having to be passed through the cooling channel.
- the distributor device provides a flow path via which the suction connection is in flow connection with the pump inlet, bypassing the cooling channel, a throttle element being arranged in the flow path and a branch line branching off from the flow path upstream of the throttle element, which is connected to a channel inlet of the Cooling channel is in flow connection, and wherein downstream of the throttle element a return line opens into the flow path, which is in flow connection with a channel outlet of the cooling channel.
- part of the cleaning liquid can flow from the suction connection directly to the pump inlet, and the remaining part of the cleaning liquid can branch off from the flow path upstream of the throttle element and initially flow through the cooling channel of the electric motor in order to then be returned to the flow path via the return line downstream of the throttle element, so that this part of the cleaning liquid can also reach the pump inlet.
- the size of the two parts of the cleaning liquid can be specified by the strength of the throttling effect of the throttle element. The smaller the throttling effect, the more cleaning fluid flows through the flow path and reaches the pump inlet, bypassing the cooling channel.
- the distributor device has a distributor housing into which the suction connection opens, the flow path extending through the distributor housing and the throttle element being arranged in the distributor housing, the distributor housing having a liquid outlet upstream of the throttle element which is connected via the branch line to the Channel inlet of the cooling channel is in flow communication, and wherein the distributor housing has a liquid inlet downstream of the throttle element, wherein the channel outlet of the cooling channel is in flow communication with the liquid inlet via the return line, and wherein the distributor housing has a collecting outlet downstream of the throttle element, which is in flow connection with the pump inlet stands.
- the provision of the distributor housing enables a very compact design of the distributor device.
- the suction connection opens into the distributor housing so that the cleaning liquid can flow into the distributor housing via the suction connection.
- the throttle element is arranged in the flow path within the distributor housing. Upstream of the throttle element, the distributor housing has a liquid outlet to which the branch line is connected. A first part of the cleaning liquid can reach the cooling channel of the electric motor via the liquid outlet and the branch line, flow through it and then return to the distributor housing via the channel outlet of the cooling channel, the return line and the liquid inlet downstream of the throttle element. The remaining part of the cleaning liquid can flow through the throttle element within the distributor housing and then reach the pump inlet together with the first part of the cleaning liquid via the collecting outlet of the distributor housing.
- the distributor housing has an inlet chamber and an outlet chamber, between which a partition with a through opening forming the throttle element is arranged, the suction connection opening into the inlet chamber and the inlet chamber the liquid outlet, and wherein the exit chamber has the liquid inlet and the collection outlet.
- the throttle element is designed in the form of a through opening of a partition wall which is arranged between an inlet chamber and an outlet chamber of the distributor housing.
- Cleaning liquid can flow into the inlet chamber via the suction connection. Part of the cleaning liquid can flow from the inlet chamber via the liquid outlet and the branch line to the cooling channel and the remaining part of the cleaning liquid can flow from the inlet chamber via the through opening of the partition to the outlet chamber.
- the output chamber Via the return line and the liquid inlet, the output chamber also receives the part of the cleaning liquid that was used to cool the electric motor, so that all of the cleaning liquid can then reach the pump inlet via the collecting outlet of the output chamber.
- the collecting outlet can be detachably connected to the pump inlet. This makes assembly of the motor pump unit and any maintenance work easier.
- the outlet chamber forms an outlet connection, the free end of which forms the collecting outlet and which can be releasably connected to the pump inlet with the interposition of a sealing element.
- a filter device is arranged in the inlet chamber upstream of the liquid outlet and the throttle element. Using the filter device, the cleaning liquid can be filtered before it can reach the cooling jacket of the electric motor and the pump inlet. It is advantageous if the inlet chamber has a mounting opening that can be closed by a housing cover for inserting the filter device into the inlet chamber. The assembly opening provides access to the entrance chamber. The filter device can be inserted into the inlet chamber via the assembly opening and removed from the inlet chamber if necessary, for example for maintenance work.
- the suction connection is conveniently located on the housing cover. This makes it possible in a structurally simple manner to separate the suction connection together with the housing cover from the inlet chamber if necessary.
- the suction connection is formed by a suction nozzle which passes through the housing cover.
- the filter device has a filter carrier on which a filter member for filtering the cleaning liquid is held, the filter carrier resting liquid-tight on the suction port with the interposition of a first sealing element and liquid-tight against a sealing surface of the inlet chamber with the interposition of a second sealing element .
- the design of the throttle element in the form of a through opening in the partition of the distributor housing has the advantage that the throttling effect of the throttle element can be easily specified by the size of the through opening.
- the diameter of the through opening of the partition is 30% to 70% of the inner diameter of the liquid outlet and the liquid inlet, in particular 40% to 60%, preferably 50%. It is advantageous if the distributor housing can be detachably connected to the pump. This makes it easier to mount the distributor housing on the pump. For example, it can be provided that the distributor housing can be screwed to the pump.
- the pump has a cylinder head and the distributor housing is arranged below the cylinder head in a horizontal position of use of the motor pump unit. This enables a particularly compact design of the motor pump unit.
- the longitudinal axis of the distributor housing is aligned parallel to the longitudinal axis of the cylinder head.
- Figure 1 a perspective view of a motor pump unit
- Figure 2 a perspective view of a distributor housing of the motor pump unit from Figure 1;
- Figure 3 a longitudinal sectional view of the distributor housing
- Figure 4 a side view of the motor pump unit, separated in the area of the distributor housing.
- the motor pump unit is designated overall by the reference number 10 and has an electric motor 12 and a pump 14 which is driven by the electric motor 12.
- the pump 14 is designed as a crankshaft pump, which has a pump block 16 and has a cylinder head 18 which rests on the side of the pump block 16.
- Such pumps are known to the person skilled in the art, for example from WO 2016/015763 Al.
- the pump block 16 accommodates a crank drive in a known manner with a crankshaft, with the help of which pistons known to those skilled in the art and therefore not shown in the drawing can be driven to a reciprocating movement.
- the cylinder head 18 has a pump inlet 22 on an underside 20 and a pump outlet 26 on an end face 24.
- Cleaning liquid to be pressurized can be supplied to the pump 14 via the pump inlet 22, and the cleaning liquid pressurized by the pump 14 can then be discharged via the pump outlet 26.
- a high-pressure line can be connected to the pump outlet 26 in a known manner, which can carry, for example, a spray gun or a spray lance at its free end.
- the electric motor 12 has a cooling channel 28, which in the illustrated embodiment is designed as a cooling coil 30 which surrounds a motor housing 32 of the electric motor 12 in the circumferential direction.
- the cooling channel 28 could also be designed, for example, as a cooling jacket surrounding the motor housing 32 in the circumferential direction.
- Such cooling coils and cooling jackets are known to the person skilled in the art, for example from DE 81 11 792 Ul and DE 38 17 641 Al.
- the cooling channel 28 has a channel inlet 34 and a channel outlet 36.
- the motor pump unit 10 also has a distributor device 38 with a distributor housing 40, the interior of which is divided into an inlet chamber 44 and an outlet chamber 46 by means of a partition 42. This becomes clear from Figures 3 and 4.
- the inlet chamber 44 accommodates a filter device 48, which is held on a suction port 50 which projects into the inlet chamber 44 and which forms a suction port 52 at its end protruding from the inlet chamber 44.
- a person skilled in the art can connect to the suction connection 52
- Known suction line for example a suction hose, can be connected.
- the inlet chamber 44 has a mounting opening 54 on its side opposite the partition 42, which can be closed by means of a housing cover 56.
- the housing cover 56 is detachably connected to the distributor housing 40 via a screw connection 58 and has a central opening 60 through which the suction port 50 passes.
- the filter device 48 has a filter carrier 62, which carries a filter member 64, for example a sieve member, and lies liquid-tight on the end of the suction port 50 projecting into the inlet chamber 44 with the interposition of a first sealing element in the form of a first sealing ring 66 and with the interposition of a second sealing element in the form of a second sealing ring 68 in a liquid-tight manner on a sealing surface 70 of the inlet chamber 44 arranged adjacent to the mounting opening 54.
- a filter carrier 62 which carries a filter member 64, for example a sieve member, and lies liquid-tight on the end of the suction port 50 projecting into the inlet chamber 44 with the interposition of a first sealing element in the form of a first sealing ring 66 and with the interposition of a second sealing element in the form of a second sealing ring 68 in a liquid-tight manner on a sealing surface 70 of the inlet chamber 44 arranged adjacent to the mounting opening 54.
- the inlet chamber 44 has a liquid outlet 72, which is in flow communication with the channel inlet 34 of the cooling channel 28 via a branch line 74.
- the partition 42 has a through opening 76, which forms a throttle element 78 and via which the inlet chamber 44 is in fluid communication with the outlet chamber 46.
- a liquid inlet 80 opens into the output chamber 46.
- the output chamber 46 is in flow connection with the channel outlet 36 of the cooling channel 28 via the liquid inlet 80 and a return line 82.
- the output chamber 46 forms an output connection 84 facing the pump inlet 22, which forms a collecting outlet 86 at its free end and is connected in a liquid-tight manner to the pump inlet 22 with the interposition of a third sealing element in the form of a third sealing ring 87.
- the distributor housing 40 On its outside, has two screw domes 88, 90, each of which can be penetrated by a connecting screw 92, with the help of which the distributor housing 40 can be releasably connected to the cylinder head 18. Only one of the two identically designed connecting screws 92 can be seen in the drawing.
- the distributor housing 40 is arranged below the cylinder head 18, with a longitudinal axis 94 of the distributor housing 40 being aligned parallel to a longitudinal axis 96 of the cylinder head 18. This gives the motor pump unit 10 a particularly compact design.
- Cleaning liquid to be put under pressure can be sucked in by means of the pump 14 in a suction operation of the motor pump unit.
- the sucked-in cleaning liquid first reaches the inlet chamber 44 via the suction port 50, where it is filtered by means of the filter device 48.
- the suctioned cleaning liquid is divided, with part of the liquid being able to reach the channel inlet 34 of the cooling channel 28 via the liquid outlet 72 and the branch line 74, so that it can then flow through the cooling channel 28 and then via the channel outlet 36 and the Return line 82 flows into the output chamber 46. This part of the cleaning liquid is therefore used to cool the electric motor 12.
- the remaining part of the cleaning liquid flowing into the inlet chamber 44 flows directly into the outlet chamber 46 via the through opening 76 forming the throttle element 78.
- the entire sucked in cleaning liquid can then flow via the collecting outlet 86 to the pump inlet 22 in order to be transported by the pump 14 to be put under pressure.
- the distributor device 38 thus forms a flow path by means of the distributor housing 40, which extends from the suction connection 52 via the inlet chamber 44, the throttle element 78, the outlet chamber 46 and the collecting outlet 86 to the pump inlet 22, bypassing the cooling channel 28.
- the branch line 74 departs from this flow path and leads part of the sucked-in cleaning liquid to the cooling channel 28, from which the cleaning liquid then flows back into the flow path via the return line 82 downstream of the throttle element 78.
- the proportion of the cleaning liquid that is used to cool the electric motor 12 can be specified by selecting the diameter of the through opening 76. The larger the diameter of the through opening 76 is selected, the smaller the proportion of cleaning liquid that is used to cool the electric motor 12.
- the diameter of the through opening is 30% to 70% of the diameter of the liquid outlet 72 and the liquid inlet 80.
- a diameter of the through opening 76 that is 40% to 60% of the inner diameter of the liquid outlet 72 and the liquid inlet 80 has proven to be particularly favorable.
- the diameter of the through opening 76 is half as large as the inner diameter of the liquid outlet 72 and the liquid inlet 80.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23739235.2A EP4565790A1 (de) | 2022-08-04 | 2023-07-05 | Motorpumpeneinheit für ein hochdruckreinigungsgerät |
| CN202380047360.4A CN119365680A (zh) | 2022-08-04 | 2023-07-05 | 用于高压清洁设备的马达泵单元 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022119592.9A DE102022119592A1 (de) | 2022-08-04 | 2022-08-04 | Motorpumpeneinheit für ein hochdruckreinigungsgerät |
| DE102022119592.9 | 2022-08-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024028034A1 true WO2024028034A1 (de) | 2024-02-08 |
Family
ID=87196523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/068573 Ceased WO2024028034A1 (de) | 2022-08-04 | 2023-07-05 | Motorpumpeneinheit für ein hochdruckreinigungsgerät |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4565790A1 (de) |
| CN (1) | CN119365680A (de) |
| DE (1) | DE102022119592A1 (de) |
| WO (1) | WO2024028034A1 (de) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8111792U1 (de) | 1981-04-18 | 1981-08-27 | Alfred Kärcher GmbH & Co, 7057 Winnenden | "motorpumpeneinheit fuer ein hochdruckreinigungsgeraet" |
| DE3817641A1 (de) | 1988-05-25 | 1989-11-30 | Kaercher Gmbh & Co Alfred | Hochdruckreinigungsgeraet |
| WO2012079623A1 (de) * | 2010-12-14 | 2012-06-21 | Alfred Kärcher Gmbh & Co. Kg | Motorpumpeneinheit für ein hochdruckreinigungsgerät sowie hochdruckreinigungsgerät |
| WO2014090314A1 (de) * | 2012-12-13 | 2014-06-19 | Alfred Kärcher Gmbh & Co. Kg | Motorpumpeneinheit |
| WO2016015763A1 (de) | 2014-07-30 | 2016-02-04 | Alfred Kärcher Gmbh & Co. Kg | Kolbenpumpe und hochdruckreinigungsgerät mit einer solchen kolbenpumpe |
| CN109412348A (zh) * | 2018-09-20 | 2019-03-01 | 江苏苏美达五金工具有限公司 | 一种双层防触电水冷式电机、电机泵单元及高压清洗设备 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2747908B1 (de) * | 2011-08-25 | 2015-10-28 | Alfred Kärcher GmbH & Co. KG | Hochdruckreinigungsgerät |
-
2022
- 2022-08-04 DE DE102022119592.9A patent/DE102022119592A1/de active Pending
-
2023
- 2023-07-05 WO PCT/EP2023/068573 patent/WO2024028034A1/de not_active Ceased
- 2023-07-05 EP EP23739235.2A patent/EP4565790A1/de active Pending
- 2023-07-05 CN CN202380047360.4A patent/CN119365680A/zh active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8111792U1 (de) | 1981-04-18 | 1981-08-27 | Alfred Kärcher GmbH & Co, 7057 Winnenden | "motorpumpeneinheit fuer ein hochdruckreinigungsgeraet" |
| DE3817641A1 (de) | 1988-05-25 | 1989-11-30 | Kaercher Gmbh & Co Alfred | Hochdruckreinigungsgeraet |
| EP0444031B1 (de) * | 1988-05-25 | 1994-01-05 | Alfred Kärcher GmbH & Co. | Hochdruckreinigungsgerät |
| WO2012079623A1 (de) * | 2010-12-14 | 2012-06-21 | Alfred Kärcher Gmbh & Co. Kg | Motorpumpeneinheit für ein hochdruckreinigungsgerät sowie hochdruckreinigungsgerät |
| WO2014090314A1 (de) * | 2012-12-13 | 2014-06-19 | Alfred Kärcher Gmbh & Co. Kg | Motorpumpeneinheit |
| WO2016015763A1 (de) | 2014-07-30 | 2016-02-04 | Alfred Kärcher Gmbh & Co. Kg | Kolbenpumpe und hochdruckreinigungsgerät mit einer solchen kolbenpumpe |
| CN109412348A (zh) * | 2018-09-20 | 2019-03-01 | 江苏苏美达五金工具有限公司 | 一种双层防触电水冷式电机、电机泵单元及高压清洗设备 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4565790A1 (de) | 2025-06-11 |
| DE102022119592A1 (de) | 2024-02-15 |
| CN119365680A (zh) | 2025-01-24 |
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