WO2022175522A1 - Pumpe mit einem elektronikgehäuse und wenigstens einem kühlkörper - Google Patents
Pumpe mit einem elektronikgehäuse und wenigstens einem kühlkörper Download PDFInfo
- Publication number
- WO2022175522A1 WO2022175522A1 PCT/EP2022/054237 EP2022054237W WO2022175522A1 WO 2022175522 A1 WO2022175522 A1 WO 2022175522A1 EP 2022054237 W EP2022054237 W EP 2022054237W WO 2022175522 A1 WO2022175522 A1 WO 2022175522A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cooling
- heat sink
- base plate
- cooling fins
- pump
- Prior art date
Links
- 238000001816 cooling Methods 0.000 claims abstract description 112
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 description 11
- 230000007423 decrease Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 101100033673 Mus musculus Ren1 gene Proteins 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5813—Cooling the 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
- 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
Definitions
- the invention relates to a pump, preferably a centrifugal pump, particularly preferably a heating circulating pump, with an electronics housing and at least one heat sink which is part of the electronics housing, the heat sink having a heat sink base plate which forms the bottom of the electronics housing and has cooling ribs extending on its outer surface.
- Modern pumps such as heating circulation pumps are equipped with extensive electronics for controlling and regulating the pump.
- a frequency converter for speed control of the pump can be an important component.
- the frequency converter or the entire pump electronics consists of a wide variety of individual components, which, among other things, form the input circuit for the voltage supply, an intermediate circuit and power electronics for frequency modulation of the operating voltage of the electric motor. These individual components differ in terms of their power loss and the resulting heat loss as well as in terms of their overall height and thus the space required within the housing.
- Adequate cooling of the electronic components is achieved using a separate heat sink, which is part of the electronics housing and guarantees adequate heat dissipation from the housing. Cooling fins extend from the outer surface of the heat sink to increase the surface area. Under certain operating conditions, the ribs can vibrate undesirably, triggered by vibrations of the pump during pump operation. The ribs are therefore often stiffened to shift the natural frequencies in order to avoid resonance vibrations.
- the object of the present invention is to show a simple way of avoiding the problems mentioned above.
- a pump preferably a centrifugal pump, particularly preferably a heating circulating pump, according to the features of claim 1.
- Advantageous designs of the pump are the subject matter of the dependent claims.
- the cooling fins it is proposed to form at least part of the cooling fins with a curved course along the heat sink base plate.
- the curved course follows a predefined radius of curvature.
- the curved course stiffens the cooling fins so that natural vibrations during pump operation are effectively prevented.
- the measure according to the invention represents a particularly simple solution that can be produced inexpensively. Another advantage of this solution is the externally attractive appearance of the ribs, since the curved course allows a uniform appearance for all ribs of the heat sink.
- the pump can preferably be designed as a centrifugal pump, particularly preferably as a heating circulation pump.
- At least one cooling fin has a radius of curvature that remains constant over its entire course, ie the cooling fin is curved over its entire axial length along the heat sink base plate and not just individual sections.
- a particularly suitable radius of curvature for the cooling fins is in the range between 10 cm and 15 cm, preferably between 11 cm and 14 cm, particularly preferably between 12.5 cm and 13 cm.
- all cooling fins can have the same radius of curvature, but at least a predominant part of the existing cooling fins. It is also conceivable that the radius of curvature of adjacent cooling ribs varies, for example is reduced for the cooling ribs that are closer to the motor housing of the pump.
- the radius of curvature may be reduced depending on the proximity to the motor housing.
- the curvature of the ribs is coaxial to the motor axis (axis of rotation).
- all or at least a majority of the cooling fins run parallel to one another.
- the projection length of the individual existing cooling fins of the heat sink can vary.
- the overhang length is measured from the outer surface of the heatsink base plate to the outer free end of the fin. The rule here is that the cooling surface increases with increasing overhang length and thus the achievable cooling capacity is optimized.
- the heat sink base plate comprises a plurality of shoulders or steps.
- the inner bottom surface of the heat sink base plate is therefore not flat over the entire surface, but has several steps.
- Each resulting step defines a volume section within the electrical housing, with the volume sections defined by the steps differing in terms of their installation space height.
- the height of the installation space is limited by the distance between the heat sink base plate or the respective stage and an opposite surface within the electronics housing.
- the opposite surface can be, for example, a printed circuit board mounted within the housing as a carrier for the electronic components of the pump electronics.
- the electronics housing is divided into different installation space sections by the step-like geometric configuration of the floor area.
- Each step of the heat sink base plate can preferably create space for a specific component group of electronic components of the pump electronics.
- the electronic components of the specific component groups differ sensibly in terms of their geometric dimensions, in particular their overall height when functionally fitted on a circuit board. Accordingly, it is advantageous if the electronic components are grouped into the specific component groups depending on their component size. Alternatively or additionally, it is also particularly advantageous if the grouping is grouped depending on the heat dissipation of the component, ie the required cooling capacity.
- the fins of one stage are referred to as a fin group. Provision can be made for the cooling fins of a first stage to differ from the cooling fins of a second stage, in particular with regard to the selected overhang length. As a result, the respective cooling fin groups can differ from one another in terms of the projection lengths of their cooling fins.
- the cooling fins of at least one group of cooling fins can all or at least the majority of the cooling fins have the same projection length. It is also conceivable that the cooling fins of at least one group of cooling fins or at least a majority of the cooling fins have varying overhang lengths. For example, it can be provided that the projection lengths of adjacent cooling ribs decrease continuously, e.g. a first cooling rib has a first projection length, an adjacent cooling rib has a reduced projection length and the next but one cooling rib has a further reduced projection length. For example, it is conceivable to reduce the projection length in the direction of the motor housing of the pump.
- the space within the electronics housing can be divided into different sections for different groups of components.
- the grouping of the component groups can also be dependent on the heat loss produced in addition to their installation space height.
- the component group with the greatest power loss or the highest cooling requirement is arranged in that installation space of the electronics housing that is defined by the step of the heatsink base plate with the cooling fin group with the greatest overhang lengths.
- the high cooling capacity required there can be achieved by the larger dimensioning of the cooling fins there. It makes sense for the components of the power electronics of a frequency converter and/or the power factor correction filter to be arranged in this area, since these generate the greatest heat loss during operation.
- the component group with the smallest power loss or the lowest cooling requirement and/or the greatest overall height is arranged in that installation space of the electronics housing which, due to the step of the heat sink base plate with the cooling fin group, has the smallest overhang or no cooling fin pen is formed.
- the component group with the smallest power loss includes, for example, the components of an EMC filter and/or the input or intermediate circuit of the frequency converter. Since these components require less cooling capacity, the space within the electronics housing can be increased at the expense of the projection length of the cooling fins to the parent cooling fin group. This also makes it possible to accommodate comparatively large components with a greater overall height.
- a group of cooling fins with a shorter overhang creates an increase in volume in the electronics housing area above, so that components of the pump electronics with a large overall height can be placed in this area.
- these components since only a reduced heat dissipation can take place due to the reduced projection length of the associated cooling fins, these components must have a comparatively low power loss.
- a group of cooling fins with a comparatively large projection length only a reduced volume is available above the electronics housing. Components of the pump electronics with a lower overall height can therefore be placed in this area, but these may have a higher power loss and thus greater heat dissipation due to the greater projection length of the associated cooling fins.
- the cooling fins differ from one another not only in terms of their overhang length, but also in terms of their center distance, ie the distance between two, in particular parallel, cooling fins.
- the center distance between the cooling fins of a cooling fin group is identical and only un ferent center distances are selected for the individual cooling fin groups. It is particularly preferred if the cooling fin group with the greatest overhang has the shortest center distance, while the cooling fin group with the shortest overhang has the greatest center distance.
- the dimensions of the center distance can be based on a predefined ratio between center distance and cantilever length.
- the ratio between the center distance and the projection length of the cooling fins can be between 0.08 and 1.
- the ratio between the center distance and the projection length for the group of cooling fins with the greatest projection length is preferably in a range between 0.08 and 0.14, preferably between 0.095 and 0.125.
- the group of cooling fins with the smaller or the smallest projection length provides a ratio between 0.3 and 1, preferably between 0.4 and 0.89.
- the wall thickness of the cooling ribs can be selected to be identical for all cooling ribs and is preferably in a value range between 2 mm and 7 mm, in particular around 5.7 mm.
- the electrical components with comparatively high power losses should be in as direct contact as possible with the heat sink base plate in order to optimize heat dissipation via the heat sink. This is not always possible without problems due to the design and installation space.
- a thermal coupling element can be introduced between the component surface and the heat sink, in order to thereby optimize heat dissipation.
- Components with comparatively low power loss do not have to be in direct contact with the heat sink, since natural convection is sufficient for the necessary heat dissipation.
- FIG. 1a, 1b perspective side views of the invention
- FIG. 2 a plan view of the underside of the heat sink of the heating circulating pump according to the invention
- Figures 3a, 3b, 3c, 3d sectional views along the section lines A-A or B-B or CC or D-D of Figure 2 and
- Figures 4a, 4b two longitudinal sections through the heat sink to show the
- Figure 5 is a sectional view along line C-C according to a modified embodiment of the invention.
- FIG. 1a, 1b show perspective side views of the pump according to the invention, which can advantageously be designed as a centrifugal pump or heating circulating pump.
- This consists of a hydraulic part 1, the pump impeller of which is connected to the rotor of the electric motor 2 via the pump shaft.
- the electronics housing 3 is mounted on the axial end face of the electric motor housing and is composed of a metallic heat sink 4 and a plastic part 5 .
- the cooling body 4 consists of a cooling body base plate 6, which forms the housing base of the electronics housing 3, above which the housing 3 on Motor 2 is mounted.
- the external surface of the heatsink base plate 6 has a large number of cooling fins 10 . All cooling fins run parallel to each other. No ribs are provided in the area of the mounting surface of the heat sink 4 on the motor housing.
- None of the ribs 10 runs in a straight line along the bottom surface, but instead the ribs 10 show a curved course with a defined radius of curvature.
- the radius of curvature is in the range of 12.5 - 13 cm, with the course of the ribs being roughly coaxial to the motor axis.
- the radius of curvature can be reduced within the given value range, depending on the distance of the rib 10 to the motor axis. Due to the curved course of the ribs 10, the natural frequency of the ribs 10 is shifted, so that no undesired resonant vibrations of the ribs 10 occur during regular pump operation.
- the axial distance i.e. the distance between two adjacent ribs 10
- the ribs 10b, 10c closer to the motor axis have a larger mutual center distance.
- FIGS. 3a, 3b, 3c show longitudinal sections through the electronics housing 3 of the pump, once along the section axis AA, once along the section axis BB and along the section axis CC.
- FIG. 3d shows a cross section through the electronics housing 3 along the cutting axis DD.
- the heatsink base plate 6 is stepped out, ie the inner bottom surface of the plate 6 has several steps 6a, 6b, 6c, 6d, the distance from the internal main circuit board 20 of the electronics housing varies. This results in a different available installation space height between the heat sink base plate 6 and circuit board 20 for the individual stages 6a-6d, which can be utilized by the electronic components mounted on the circuit board 20.
- the stages 6a- 6c have the curved cooling fins 10 on their outer surface of the heatsink base plate 6.
- the cooling fins 10a of the first stage 6a have the largest Projection length which, as can be seen in FIG. 3a, steadily decreases from right to left in the direction of the motor 2.
- the cooling ribs 10b of stage 6b have a projection length that is reduced compared to the first stage 6a, but all ribs 10b of stage 6b have the same projection length.
- the cooling ribs 10c of the third stage 6c have the shortest projection length (see FIGS. 3b, 3c), with all ribs 10c of the third stage 6c also having the same length here. It can also be seen that the ribs 10b, 10c are the same ribs, but that they change their overhang length over their curvature due to the steps 6b, 6c (see FIG. 3d).
- the fourth stage 6d has no ribs 10. Furthermore, it can be seen from FIGS. 4a, 4b that the center distance between the respective ribs 10 varies.
- the ribs 10a of the first stage 6a all have the same center distance, but this is the smallest distance in comparison with all the ribs 10b, 10c.
- the center distance between the ribs 10b, 10c of the second and third stage 6b, 6c is also identical, but larger than the center distance between the ribs 10a of the first stage 6a.
- component group B which is installed in the area of step 6c
- component group C which is arranged in the area of step 6b
- certain components 21 of the input or intermediate circuit such as capacitors
- FIGS. 3c, 3d show that certain components 21 of the input or intermediate circuit, such as capacitors, have a comparatively large overall height (see FIGS. 3c, 3d). These are therefore arranged in the area of level 6c, as this offers sufficient overall height.
- the installation space of the stage 6c is increased at the expense of the overhang length of the associated ribs 10c compared to the stage 6b. This is possible because the capacitor 21 has a relatively low power loss, but takes up more space. ok
- the component group A contains semiconductor elements and other components of the power electronics of the frequency converter as well as any power factor correction filter.
- a comparatively low overall height is sufficient for these components, so that they are arranged in the area of stage 6a.
- the relatively small installation space of the stage 6a allows a significantly larger dimensioning of the projecting length of the local ribs 10a, so that the achievable heat dissipation and cooling of the component group A can be significantly improved. This is additionally promoted by the reduced center distance between the local cooling fins 10a.
- Component group D includes the components of an EMC filter. These components do not require a great overall height, nor are they characterized by a relatively high heat dissipation, so that they are arranged in the area of stage 6d. No ribs 10 can be provided in this area due to the interface with the motor housing.
- the cooling fins are designed with different projection lengths and center distances.
- the relationship between the axial distance and projection length is dimensioned differently for the individual steps 6a, 6b, 6c and is illustrated in FIGS. 4a, 4b.
- the cooling ribs 10a of the first stage 6a have a constant mutual center distance of 4 mm, while the projection length of the outermost rib 10a' in this area is 42 mm.
- the projection lengths of the adjoining ribs 10a decrease continuously, the smallest rib 10a'' in this area has a projection length of 32 mm. This results in a variable ratio between center distance and overhang length of 0.095 to 0.125.
- the ratio of the cooling fins 10b of the second stage 6b is 0.4, while the ratio of the cooling fins 10c in the region of the stage 6c is 0.89.
- the wall thickness for all cooling fins 10a-10c is dimensioned at 5.7 mm.
- FIG. 5 shows a longitudinal section through the electronics housing according to a modified embodiment.
- the only difference compared to the embodiment of Figures ren 1 to 4a, 4b is that there individual components 21 with the help of thermal Coupling elements 22 are indirectly connected to the heatsink base plate 6 in order to optimize the heat dissipation of the components 21 in the heatsinks 6 again. This can be necessary in particular when a direct connection between the components 21 and the heat sink 6 is not possible due to the design.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22706842.6A EP4295055A1 (de) | 2021-02-22 | 2022-02-21 | Pumpe mit einem elektronikgehäuse und wenigstens einem kühlkörper |
CN202280016170.1A CN116867977A (zh) | 2021-02-22 | 2022-02-21 | 具有电子器件壳体和至少一个冷却体的泵 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021000931.2 | 2021-02-22 | ||
DE102021000931.2A DE102021000931A1 (de) | 2021-02-22 | 2021-02-22 | Pumpe mit einem Elektronikgehäuse und wenigstens einem Kühlkörper |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022175522A1 true WO2022175522A1 (de) | 2022-08-25 |
Family
ID=80595391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/054237 WO2022175522A1 (de) | 2021-02-22 | 2022-02-21 | Pumpe mit einem elektronikgehäuse und wenigstens einem kühlkörper |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4295055A1 (de) |
CN (1) | CN116867977A (de) |
DE (1) | DE102021000931A1 (de) |
WO (1) | WO2022175522A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10321732A1 (de) * | 2003-05-14 | 2004-12-02 | Robert Bosch Gmbh | Kühlung der Ansteuerung von Kühlgebläsen für Kraftfahrzeugmotoren |
DE102010039142A1 (de) * | 2010-08-10 | 2012-02-16 | Behr Gmbh & Co. Kg | Kühlluftgebläse |
DE102015016260A1 (de) * | 2015-12-15 | 2017-06-22 | Wilo Se | Elektronikgehäuse mit Kühlrippen |
EP3587824A1 (de) * | 2018-06-27 | 2020-01-01 | HIDRIA d.o.o. | Elektrischer ventilator |
US20200232469A1 (en) * | 2017-02-17 | 2020-07-23 | Edwards Japan Limited | Controller and vacuum pump device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29915465U1 (de) | 1999-09-03 | 2001-01-18 | Schneider-Clauss GmbH & Co. KG Metallwarenfabrikation, 50677 Köln | Kühlelement |
DE10031465B4 (de) | 2000-06-28 | 2006-06-01 | eupec Europäische Gesellschaft für Leistungshalbleiter mbH & Co. KG | Kühleinrichtung für eine Schaltungsanordnung |
EP2166230B1 (de) | 2008-09-19 | 2018-11-21 | Grundfos Management A/S | Pumpenaggregat |
DE102011012673A1 (de) | 2010-03-17 | 2011-09-22 | Hitachi Automotive Systems, Ltd. | Elektronische Steuereinrichtung für Fahrzeuge |
JP2014063930A (ja) | 2012-09-21 | 2014-04-10 | Hitachi Automotive Systems Ltd | 電子制御装置 |
DE102015016282A1 (de) | 2015-12-16 | 2017-06-22 | Wilo Se | Motorabdeckung für einen Elektromotor |
US20220201899A1 (en) | 2019-04-10 | 2022-06-23 | Sew-Eurodrive Gmbh & Co. Kg | Electric appliance having a housing part |
-
2021
- 2021-02-22 DE DE102021000931.2A patent/DE102021000931A1/de active Pending
-
2022
- 2022-02-21 CN CN202280016170.1A patent/CN116867977A/zh active Pending
- 2022-02-21 WO PCT/EP2022/054237 patent/WO2022175522A1/de active Application Filing
- 2022-02-21 EP EP22706842.6A patent/EP4295055A1/de active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10321732A1 (de) * | 2003-05-14 | 2004-12-02 | Robert Bosch Gmbh | Kühlung der Ansteuerung von Kühlgebläsen für Kraftfahrzeugmotoren |
DE102010039142A1 (de) * | 2010-08-10 | 2012-02-16 | Behr Gmbh & Co. Kg | Kühlluftgebläse |
DE102015016260A1 (de) * | 2015-12-15 | 2017-06-22 | Wilo Se | Elektronikgehäuse mit Kühlrippen |
US20200232469A1 (en) * | 2017-02-17 | 2020-07-23 | Edwards Japan Limited | Controller and vacuum pump device |
EP3587824A1 (de) * | 2018-06-27 | 2020-01-01 | HIDRIA d.o.o. | Elektrischer ventilator |
Also Published As
Publication number | Publication date |
---|---|
EP4295055A1 (de) | 2023-12-27 |
CN116867977A (zh) | 2023-10-10 |
DE102021000931A1 (de) | 2022-08-25 |
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