EP4314562A1 - Kreiselpumpe mit elektronikgehäuse und wenigstens zwei platinen - Google Patents
Kreiselpumpe mit elektronikgehäuse und wenigstens zwei platinenInfo
- Publication number
- EP4314562A1 EP4314562A1 EP22719569.0A EP22719569A EP4314562A1 EP 4314562 A1 EP4314562 A1 EP 4314562A1 EP 22719569 A EP22719569 A EP 22719569A EP 4314562 A1 EP4314562 A1 EP 4314562A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit board
- centrifugal pump
- pump according
- pin
- pin connector
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0693—Details or arrangements of the wiring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0686—Mechanical details of the pump control unit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
Definitions
- the invention relates to a centrifugal pump with a two-part electronics housing containing at least two circuit boards that are mounted spatially separated from one another and are electrically conductively connected to one another by means of at least one electrical connection.
- centrifugal pumps in particular heating circulating pumps, are built with an increasingly complex electronic control system for the operation of the centrifugal pump.
- centrifugal pumps for energy-efficient operation include a frequency converter for speed control of the pump operation.
- the electronics required for this are housed within a dedicated electronics housing of the pump, which is designed in at least two parts for assembly purposes.
- the pump electronics can have additional electronic components for realizing a user interface.
- the building blocks for the user interface on the one hand and the building blocks for the pump control on the other hand can be accommodated on separate circuit boards that are spatially separated from one another within the electronics housing. Using separate single-sided boards is often cheaper than using a single double-sided board.
- the two circuit boards are installed in the housing in such a way that their unequipped sides face each other. For the necessary signal exchange or the power supply of the components on both boards, an electrical connection between the boards must be established. However, the connection by means of electrical lines, which are soldered to corresponding connec tion points on the circuit boards, means disadvantageously an additional assembly step during production.
- a pin connector includes, for example, one or more rigid metal pins that can be plugged into corresponding pin receptacles on the circuit boards.
- the pin connector is connected to the first circuit board, for example before or after it is installed in the electronics housing.
- the pin connector can be connected to the first circuit board in any manner, but it is preferably plugged into a suitable pin receptacle or socket on the first circuit board.
- the second circuit board can be inserted into a second housing part beforehand. When assembling the two housing parts, the end of the pin connector that is still free is inserted into the pin receptacle or socket on the second circuit board, thereby automatically connecting it.
- the second circuit board could also be inserted into the housing part accommodating the first circuit board.
- Inserting the pin connector into the pin receptacle requires a certain precision during assembly. If, for example, the boards are only equipped on one side and the unequipped board sides are opposite, the free end of the pin connector must Ders first Runaway leads through comparatively small holes in the second circuit board to be inserted into the pin receptacle located on the populated side of the circuit board. Due to the comparatively small bore diameter, this assembly step becomes even more complicated.
- At least one assembly aid in order to simplify the insertion of the pin connector into the pin receptacle of the second circuit board.
- Such an assembly aid supports the assembler during the assembly of the second circuit board, in particular when assembling the housing parts and accurately feeding the pin connector to the pin receptacle of the second circuit board, so that damage to the pin connector is avoided and the assembly process is simplified and accelerated.
- an insertion aid for the pin connector can be provided as an assembly aid in the pin receptacle of the second circuit board or the corresponding bores in the second circuit board.
- Conceivable is the execution in the form of Ein Industriesschrä conditions in the opening area of the pin holder. If the pin connector has to be passed through the holes in the board, the opening edges of the board holes facing the first board can be designed with an insertion aid.
- the bore openings of the second board facing the first board each comprise a circumferential chamfer that widens the bore diameter in the direction of the first board.
- At least one of the housing parts can have at least two centering pins as an assembly aid.
- the length of the centering pins is dimensioned in such a way that the centering pins are passed or can be passed through the associated through-holes of the first and second board one after the other.
- the centering pins are assigned by the Through-holes in the second circuit board are carried out, in particular the second circuit board is pushed onto the centering pins in the direction of the first circuit board.
- the centering pins are used to pre-center the second circuit board and the pin connector can be carried out precisely and securely in the pin receptacle of the second circuit board or first through the holes in the second circuit board as the circuit boards are further brought together. All in all, the entire assembly process of the electronics housing, including the provision of the electrical connection between the two spatially separate circuit boards, is significantly simplified.
- the electrical pin connector may include one or more metal pins used to provide multiple electrical contacts between the two circuit boards. These metal pins usually have a comparatively small diameter, so that the associated bores in the second circuit board also have a comparatively small bore diameter.
- the first housing part is usually a plastic part, and the centering pins formed on the inner wall of the first housing part are therefore also made of plastic.
- the housing part can be produced using a plastic injection molding process, which means that the centering pins are provided with draft angles for technical reasons, i.e. they usually have a conical shape in the longitudinal direction with a radius that decreases from the inner wall towards its free end.
- the through-holes in the second circuit board would have to be designed for the largest possible diameter of the centering pins, which is why there would be a comparatively large amount of play between the tips of the centering pins and the through-hole in the second circuit board at the beginning of the sliding process, which would make precise pre-centering more difficult would.
- an outer longitudinal section of the at least two centering pins should be almost cylindrical and not conical. gang holes of the second circuit board is carried out.
- this section should have no or only very small draft angles, for example in an angular range between 0° and a maximum of 1°, preferably between 0° and a maximum of 0.75°, ideally between 0° and a maximum of 0.5°.
- the outer longitudinal section of the centering pins has an almost constant diameter, which is matched to the bore diameter of the second circuit board. The resulting play therefore remains as minimal as possible throughout the entire length of the second board that is pushed on, which means that the second board can be pre-centered in a precise position for inserting the pin connector into the associated bores or pin receptacle of the second board.
- the length of the centering pins is dimensioned starting from the mounted first board to its free end greater than the total length of the pin connector binder starting from the first board, especially the unpopulated underside of the first board, to the mounted second board. This ensures that during assembly the second circuit board is first placed on the centering pins and only subsequently, when the second circuit board is pushed on further in the longitudinal direction of the centering pins, the pin connector is carried out through the holes in the second circuit board.
- the outer length portion of the centering pins i. H. the almost zy-cylindrical length section, dimensioned longer than the total insertion depth of the pin connector in the pin receptacle or through the holes in the second circuit board.
- This measure ensures that the centering pins can be passed through the holes in the second circuit board in advance and that the second circuit board is precisely centered and stabilized over the entire plug-in movement of the pin connector.
- the conical section of the at least two centering pins can have at least one step, which divides the conical section into a first and second conical section. It can be provided that the first cone section directly adjoins the electronics housing part and is clearly larger in diameter than the second cone section. Furthermore, the first cone section can be designed with a longitudinal bore.
- the longitudinal bore can have manufacturing reasons. The longitudinal bore ensures that sufficient material reaches the tip of the centering pins during manufacture using the injection molding process. The longitudinal bore also ensures a homogeneous wall thickness in the longitudinal direction.
- the step is at the level of the through hole in the first circuit board. Ideally, the step or step edge is flush with the top of the circuit board.
- the first circuit board includes electronic components for implementing a user interface (HMI), for example for controlling a display element and/or evaluating a control panel. Due to the comparatively moderate heat development of the local components during pump operation, the circuit board can be mounted on the first housing part made of plastic.
- the second circuit board preferably includes all or most of the electronic components for implementing the pump control, in particular using a frequency converter. There is a considerable need for cooling for the necessary power electronics, so that it is proposed to manufacture the second housing part at least partially from metal, which serves as a heat sink for dissipating the waste heat produced.
- the centrifugal pump itself can be designed as an inline pump.
- Inline pumps are centrifugal pumps whose pump pressure and suction ports are located in a straight pipeline.
- the centrifugal pump is particularly preferably a heating circulation pump.
- the design of the electronic housing part with assembly aids enables precise assembly of the circuit boards and their simple che electrical contact.
- the object is consequently also achieved by an assembly method according to the invention, which is preferably carried out during the assembly of the centrifugal pump according to the invention.
- the procedure includes the following steps.
- the assembly sequence with which the circuit boards are used in the respective housing parts plays no or only a minor role for the invention. It makes sense to use at least one pin connector in the pin receptacle of the first board before the first board is positioned. Alternatively, the pin connector can of course also be connected to the second circuit board first. It is also conceivable that the pin connector is inserted into the pin receptacle of the circuit board only after the circuit board has been positioned and fixed in the respective housing part.
- the at least one assembly aid supports this.
- Insertion aids in the opening area of the holes in the second circuit board facilitate the precise insertion of the free ends of the pin connector when assembling.
- centering pins are provided as an alternative or in addition, they are carried out through the associated through-holes in the first circuit board when positioning the first circuit board within the first housing part.
- the centering pins are first carried out through the through-holes of the second circuit board and the second circuit board is pushed onto the centering pins in the direction of the first circuit board until the at least one pin connector is fully inserted into the pin receptacle of the second circuit board.
- FIG. 1 a top view of the first housing part with the first circuit board inserted
- FIG. 2 a plan view of the second housing part with the second electronic circuit board inserted
- Figure 3 a sectional view through the dismantled housing parts of the electronic nikgetudes with each used electronics boards and
- Figure 4a-4d Longitudinal sections through the centering process during assembly in chronological order.
- FIG. 1 shows a plan view of the first housing part 10 of the electronics housing, which consists of a plastic housing part.
- the top view shows the open side of the Ge housing part 10 and the first electronic circuit board 12 inserted into the housing part 10 to implement the user interface, hereinafter also referred to as the HMI circuit board 12.
- the circuit board 12 is placed on corresponding bearing points of the plastic housing 10 and additionally screwed to the housing part 10 for fixing.
- the circuit board 12 is populated on one side, the populated side of the circuit board with the electronic components sharing the inner wall of the plastic housing 10 facing. In the top view of FIG. 1, therefore, the underside of the circuit board without components can be seen.
- FIG. 2 shows a plan view of the open side of the second housing part 11, which is designed here as a metallic heat sink.
- the cooling body 11 is used to accommodate and store a second electronic circuit board 13.
- the circuit board 13 forms the main circuit board of the centrifugal pump according to the invention, in the present example designed as a heating circulation pump, and includes the necessary components for the pump control including a frequency converter for speed control.
- the electronic components required for this include, among other things, power modules whose waste heat can be released to the environment by means of the heat sink 11 .
- the motherboard 13 is only equipped on one side, this - is installed with the be tipped side down, ie the components are facing the inner wall of the heat sink 11 - similar to the circuit board 12. The reason for this is the better thermal connection of the components that require cooling to the heat sink 11.
- the HMI circuit board 12 Since the pump mains connection is made via the main circuit board 13, the HMI circuit board 12 must be electrically connected to the main circuit board 13 for the power supply. An exchange of signals between the two circuit boards 12, 13 must also be possible.
- the electrical cal connection is realized by means of a pin connector 15, which has a plurality of metallic, mutually parallel pins, the end with a corre sponding pin receptacle 15 a of the first and second circuit board 12, 13 can be connected.
- the connection is purely mechanical.
- the circuit board 12 has a large number of small bores 14, through which the pins of the pin connector 15 can be carried out.
- the base 15a of the pin connector 15 rests on the populated side of the circuit board 12.
- a counter-adapter 15b is provided, which can be an integral part of the pin connector 15 or, alternatively, could be pushed on later after the pin connector 15 has been inserted into the base 15a.
- the metal pins of the pin connector 15 must be inserted through the corresponding holes 18 of the motherboard 13 who the.
- it is fixed by means of a base 15 and the counter-adapter 15b, which, as described above, can be an integral part of the pin connector 15 or, alternatively, can be fitted later.
- the pin connector 15 is first preassembled on the HMI circuit board 12 and this is then inserted into the plastic housing 10 and fixed there.
- the motherboard 13 is pre-assembled in the heat sink 11. When assembling the housing parts 10, 11 it must be ensured that the tips of the pin connector 15 are inserted into the holes 18 in the main circuit board 13.
- At least one assembly aid is provided. It may already be sufficient, the opening area of the holes 18 of the Bevel motherboard 13, resulting in insertion aid 18a for the tips of the binder 15 Stiftver result. This increases the tolerance range when feeding the pin connector to the bores 18.
- two identical plastic domes 20 or centering pins are formed as further assembly aids for pre-centering the main circuit board 13 together with the heat sink 11 on the plastic housing part 10, which extend perpendicularly from the inside of the housing into Cantilever towards the heat sink 11. This existence of these centering pins 20 is optional for the use of the insertion aids 18a. There is also the possibility of doing without the insertion aids 18a and only using the centering pins 20 instead.
- the centering pins 20 are already inserted during the pre-assembly of the HMI board 12 through pas send through holes 17 of the board 12.
- the main circuit board 13 also has in the area around the bores 18 for the pin connector 15 additional through-holes 16 through which the centering pins when assembling the Ge housing parts 10, 11 are carried out in order to achieve a pre-centering of the second circuit board 13 for the first circuit board 12.
- the tips of the pin connector 15 also fit precisely into the bores 18.
- FIGS. 4a to 4d document the chronological sequence of events when the housing parts 10, 11 are assembled.
- the figures also show the special structure of the centering pins 20.
- the two centering pins 20 are identical and include a first longitudinal section 20a, which extends from the bottom of the plastic housing 10 to a first step 21. Due to the manufacturing process, this longitudinal section 20a has a cone shape with a diameter that reduces in the overhang length. The reasons for this are the draft angles to be provided in the injection molding manufacturing process.
- the first longitudinal region 20a is followed by a second longitudinal region 20b, which has an abruptly reduced diameter due to the step 21 and which tapers in the projection direction due to the cone shape also present there.
- the stage 21 closes with the opening edge of the holes 17 of the board 12 almost flush.
- the opening diameter of the through-hole gene 17 is matched to the diameter range of the longitudinal section 20 a of the plastic dome 20 .
- the longitudinal region 20b is followed by an outer longitudinal region 20c, which is ideally designed without or with only minimal draft angles.
- the angle of the draft angles there is 0° or almost 0°, so that the centering pins 20 are approximately cylindrical in this length range.
- the through-holes 16 in the main circuit board 13 for receiving the centering pins 20 are matched to the diameter of the longitudinal section 20c. This results in minimal play between the centering pins 20 and the through hole 16 and extremely precise pre-centering of the second circuit board 13 and the housing part 11 .
- the maximum insertion depth of the pin connector 15 through the bores 18 is limited by the mating adapter 15b of the pin connector 15, which strikes the unequipped side of the circuit board 13.
- the length of the plug connector 15 from the mating adapter 15b to the outer tip of the pin connector 15 is dimensioned smaller than the outer length region 20c of the centering pins 20. This ensures that the centering pins 20 first engage in the associated through-holes 16 of the main circuit board 13 during assembly , before the metal pins of the pin connector 15 can be inserted into the associated holes 18 (s. Figures 4a, b).
- the first longitudinal section 20a has a longitudinal bore 22, which is due to the plastic injection molding process used to manufacture the plastic housing part 10 for technical reasons.
- This bore 22 a homogeneous wall thickness of the plastic dome 20 is achieved over the entire length.
- the outer longitudinal area 20c of the injection mold can be filled with sufficient plastic material.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021001715.3A DE102021001715A1 (de) | 2021-04-01 | 2021-04-01 | Kreiselpumpe mit Elektronikgehäuse und wenigstens zwei Platinen |
| PCT/EP2022/058447 WO2022207724A1 (de) | 2021-04-01 | 2022-03-30 | Kreiselpumpe mit elektronikgehäuse und wenigstens zwei platinen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4314562A1 true EP4314562A1 (de) | 2024-02-07 |
| EP4314562B1 EP4314562B1 (de) | 2026-05-06 |
Family
ID=81392998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22719569.0A Active EP4314562B1 (de) | 2021-04-01 | 2022-03-30 | Kreiselpumpe mit elektronikgehäuse und wenigstens zwei platinen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4314562B1 (de) |
| CN (1) | CN117083461A (de) |
| DE (1) | DE102021001715A1 (de) |
| WO (1) | WO2022207724A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026002448A1 (en) * | 2024-06-28 | 2026-01-02 | Grundfos Holding A/S | A controller for a pump with integrated sensing, computing, and control functionalities |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5443398A (en) * | 1994-01-31 | 1995-08-22 | Robinson Nugent, Inc. | Inverse backplane connector system |
| US8449335B2 (en) * | 2011-04-18 | 2013-05-28 | Tyco Electronics Corporation | Electrical connectors and receptacle assemblies having retention inserts |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8910765U1 (de) | 1989-09-09 | 1989-11-02 | Püschel, Lutz-Jürgen, 6800 Mannheim | Steckverbinder, insbesondere Buchsenleiste oder Stiftleiste |
| US6065946A (en) * | 1997-07-03 | 2000-05-23 | Servo Magnetics, Inc. | Integrated controller pump |
| US6528986B2 (en) * | 2000-12-28 | 2003-03-04 | Schlumberger Resource Management Services, Inc. | Inner component board assembly for an electric utility meter |
| CN204327521U (zh) * | 2014-12-18 | 2015-05-13 | 合肥新沪屏蔽泵有限公司 | 泵组件 |
| CN205544743U (zh) * | 2016-04-19 | 2016-08-31 | 合肥新沪屏蔽泵有限公司 | 泵组件 |
| EP3530959B1 (de) | 2018-02-21 | 2022-06-01 | Grundfos Holding A/S | Pumpenaggregat |
| DE102020211008A1 (de) | 2019-09-11 | 2021-03-11 | Interplex NAS Electronics GmbH | Stromrichter für ein Fahrzeug |
| CN116113766A (zh) | 2020-08-28 | 2023-05-12 | Ksb股份有限公司 | 控制组件 |
-
2021
- 2021-04-01 DE DE102021001715.3A patent/DE102021001715A1/de active Pending
-
2022
- 2022-03-30 WO PCT/EP2022/058447 patent/WO2022207724A1/de not_active Ceased
- 2022-03-30 EP EP22719569.0A patent/EP4314562B1/de active Active
- 2022-03-30 CN CN202280025140.7A patent/CN117083461A/zh active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5443398A (en) * | 1994-01-31 | 1995-08-22 | Robinson Nugent, Inc. | Inverse backplane connector system |
| US8449335B2 (en) * | 2011-04-18 | 2013-05-28 | Tyco Electronics Corporation | Electrical connectors and receptacle assemblies having retention inserts |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2022207724A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022207724A1 (de) | 2022-10-06 |
| CN117083461A (zh) | 2023-11-17 |
| EP4314562B1 (de) | 2026-05-06 |
| DE102021001715A1 (de) | 2022-10-06 |
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