CN203948312U - Brush DC draining pump and the drainage system of air conditioner - Google Patents
Brush DC draining pump and the drainage system of air conditioner Download PDFInfo
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- CN203948312U CN203948312U CN201420402167.6U CN201420402167U CN203948312U CN 203948312 U CN203948312 U CN 203948312U CN 201420402167 U CN201420402167 U CN 201420402167U CN 203948312 U CN203948312 U CN 203948312U
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Abstract
The utility model discloses a kind of brush DC draining pump of air conditioner, upper pump casing, motor casing and scaffold are connected successively, stator module and rotor assembly are installed in the cavity that motor casing and scaffold be connected to form, water pump shell and upper pump casing are fixedly connected to form the pump chamber that holds impeller, and impeller is arranged on motor shaft one end of rotor assembly, control panel is fixed on the bottom of scaffold, and control panel comprises non-bridge circuit and the Hall transducer with two power drive switches.A kind of drainage system of air conditioner of the brush DC draining pump that comprises above-mentioned air conditioner is also disclosed.The brush DC draining pump of air conditioner of the present utility model, the water cavity of draining pump work and motor cavity are isolated, make the water power of draining pump isolated, guaranteed the job security of motor, in brushless single phase motor, control panel utilizes Hall transducer detection rotor position, reduce the usage quantity of components and parts, greatly reduced the rate of fault of drive controller, extended the working life of motor.
Description
Technical field
The utility model relates to draining pump and the drainage system technical field of air conditioner, particularly a kind of draining pump of the air conditioner being driven by brshless DC motor and drainage system.
Background technique
Air-conditioning system, the indoor unit of ceiling air conditioner particularly, when freezing operation, airborne moisture meeting condensation is also attached on heat exchanger, then dropping onto in the condense water disk that is located at heat exchanger below slowly, the collecting of condensed water, the normal use that water clock can have influence on air-conditioning system, also easily cause the problems such as air-conditioning system fault, pipeline be mouldy.For by accumulate in condensed water in this condense water disk be discharged to outdoor, therefore be provided with the draining pump of this suction condensed water.This draining pump links together by motor shaft and the impeller of drive motor, when drive motor makes blade rotary, the water accumulating in condense water disk will be inhaled into pump chamber from the blade lower end of suction port, under the effect of centrifugal force, along pump chamber inwall, be discharged from, this draining pump comes forth in a lot of patent documentations, such as: CN1144305A, CN101900124A etc.
The drive motor that ceiling-mounted type air conditioner draining pump uses in the market mainly contains motor with cup rotor and brshless DC motor, brushless electric machine has low power consuming with respect to motor with cup rotor, the features such as high efficiency, and, along with the development of Power Electronic Technique and the brushless control technique of motor, brushless electric machine has the irreplaceable Security of motor with cup rotor, controllability and working efficiency.
But, existing air conditioner is brushless, and draining pump exists not reasonably local in mechanical structure and assembly technology, and its drive motor two phase brushless DC motors or three-phase brushless dc motors of adopting more, these two kinds of motors are due to itself principle and circuit structure, circuit elements device is many,, there is higher rate of fault and cost of production in complex circuit, often allows client be difficult to accept.The problem existing in order to overcome existing air conditioner drainage system, need to develop that a kind of production technology is simple, reliable performance and lower-costly using air conditioner brushless draining pump and the drainage system of single-phase brushless direct-current motor as drive motor.
Model utility content
The purpose of this utility model is to provide draining pump and the drainage system that a kind of DC Brushless Motor that is applied to air conditioner drives, and not only flow is large for this draining pump, noise is low, and rational in infrastructure, and technique is simple, is easy to assembling, and cost of production is low.
For achieving the above object, the utility model provides a kind of brush DC draining pump of air conditioner, comprise motor, impeller and water pump shell, motor is single-phase brushless DC motor, motor comprises stator module, rotor assembly, control panel and motor casing assembly, motor casing assembly comprises upper pump casing, motor casing and scaffold, upper pump casing, motor casing is connected successively with scaffold, stator module and rotor assembly are installed in the cavity that motor casing and scaffold be connected to form, water pump shell and upper pump casing are fixedly connected to form the pump chamber that holds impeller, and impeller is arranged on motor shaft one end of rotor assembly, control panel is fixed on the bottom of scaffold.
Wherein, stator module comprises stator iron core and staor winding, and stator iron core comprises ring-type yoke portion and some teeth groove, and ring-type yoke portion and teeth groove are split structure, and stator iron core teeth groove number is that staor winding adopts double winding form.
Rotor assembly comprises rotor magnetic pole and the motor shaft of 2 pairs of utmost points.
Control panel comprises non-bridge circuit and the Hall transducer with two power drive switches, and two power drive switches of non-bridge circuit are connected respectively to Hall transducer.Hall transducer, for detection of the polarity of rotor magnetic pole, provides rotor-position signal according to polarity, and this position signal triggers corresponding power switch in non-bridge circuit and opens and close, and realizes the doublewound conducting in turn of stator.
Upper pump casing is connected by seizing type with motor casing, the pump chamber inner wall outside edge of upper pump casing is along the circumferential direction intervally distributed with two sections of recessed screw threads, between two sections of recessed screw threads, be provided with two sections of anti-rotation grooves, corresponding motor casing position of installing is provided with convex thread and the anti-rotation boss suitable with recessed screw thread, anti-rotation groove, recessed screw thread coordinates with the direct seizing type of convex thread, and the cooperation of anti-rotation boss and anti-rotation groove can prevent from carrying out after upper pump casing and motor casing from coordinating the rotation of circumferencial direction.
Motor casing and scaffold carry out interference fit connection by embedded buckle, on the housing outer wall of motor casing, along its circumferencial direction, are provided with two symmetrical, length differs buckle boss, at scaffold corresponding position, are provided with the buckle suitable with buckle boss.
Between motor shaft and scaffold, be provided with upper bearing (metal), between motor shaft and motor casing, be provided with lower bearing, between upper bearing (metal) and scaffold, by upper bearing bracket, coordinate, upper bearing bracket is connected on scaffold by ultrasonic welding; Between lower bearing and motor casing, by lower axle bed, coordinate, between step and motor casing, by seizing type, be connected; Between upper bearing bracket and upper bearing (metal), be respectively equipped with aligning pad and immersion oil felt between step and lower bearing.Aligning pad is in order to adjust the position of upper and lower bearing, and immersion oil felt is lubricated upper and lower bearing.
Control panel is installed to the bottom of scaffold by the mode of embedding.
The side wall inner surfaces of scaffold is provided with positioning boss, for locating stator module; The bottom of scaffold is provided with a through hole, and in through hole, interference fit has a rubber stopper, and the lighting outlet of control panel is guided outside into by rubber stopper.
Upper pump casing is provided with at least one and is communicated with extraneous air pressure notch, in order to keep brushless electric machine internal cavity and extraneous air pressure balance.
The utility model also provides a kind of drainage system of air conditioner, comprise brush DC draining pump, water level sensor, the flexible pipe of above-mentioned air conditioner and be arranged on the safety check on flexible pipe, water level sensor is arranged on a side of draining pump, flexible pipe one end is connected with water pump shell water outlet, and the other end is connected with safety check water intake.
beneficial effect:
(1) the brushless draining pump of this air conditioner, water pump shell matches with upper pump casing and forms the pump chamber that holds impeller, motor casing and scaffold are connected to form the motor cavity that holds stator module and rotor assembly, the cavity that has a upper pump casing and motor casing to form between pump chamber and motor cavity, with this, water cavity of draining pump work and motor cavity is isolated, make the water power of draining pump isolated, and upper pump casing is provided with at least one air pressure notch, can in time the water entering in this cavity be discharged, effectively avoided the water in pump chamber to enter motor cavity, not only guaranteed the safety of motor electrified body part, also avoided the impact to motor bearing lubrication oil of the water that pours in down a chimney, guaranteed the reliable operation of motor, and between upper pump casing, motor casing and scaffold, adopt respectively the Placement of thread type clamping and embedded clamping, and not only assemble solid and reliablely, and technique is simple, easy to operate.
(2) the utility model is applied to control panel in the brushless single phase drain motor of air conditioner and adopts the non-bridge-type control circuit with two power drive switches; utilize Hall transducer detection rotor position; drive controller only adopts 2 power drive switches just can realize the normal commutation of two windings; reduced the usage quantity of components and parts; greatly reduce the rate of fault of drive controller, extended the working life of motor.
(3) control panel adopts the mode of the rear embedding of assembling, after being linked and packed with stator module, be installed to together in scaffold, utilize the positioning boss of scaffold reliably to locate, control panel, near the bottom of scaffold, then carries out embedding to it, does not need Embedding Material amount accurately to control in embedding process, only control panel need be covered can complete embedding completely, dosing technology is simple, cost is low.
(4) in stator module, stator iron core and teeth groove adopt split structure, not only punching separately, make full use of material, reduce waste of material, and embed in ring-type yoke portion after can adopting common winding machine to teeth groove coiling, do not need to adopt special winding machine, save cost of production, simplified production process.
(5) metal (upper adopts split type installation, adopting aligning pad to substitute the spring using in traditional motor with cup rotor adjusts bearing, the sheet metal part that adopts working of plastics bearing support to substitute motor with cup rotor use is controlled position of bearings, step is connected with buckle form with motor casing, upper bearing bracket is connected with ultrasonic welding form with scaffold, and integral installation formula formula is simple, and cost of production is low, for ease of maintenaince, be suitable for batch production; Immersion oil felt is equipped with in bearing support inside, can be lubricated bearing, thereby reduce motor noise, improves working life.
(6) water level sensor that drainage system is installed, can monitor water position status in time, and signal feed back, to air-conditioning system, is controlled to the start and stop of motor then, has both guaranteed the low consumption of motor, can in time condensed water be discharged again, prevents spill and leakage; The safety check that drainage system is installed, when motor of air conditioner quits work, can prevent that the condensed water in air conditioner outer tube from flowing backwards to draining pump, thereby effectively prevent that indoor machine of air conditioner from leaking.
Accompanying drawing explanation
Fig. 1 is the sectional view of brush DC draining pump of the present utility model;
Fig. 2 is the structural representation of stator module of the present utility model;
Fig. 3 is the structural representation of control panel of the present utility model;
Fig. 4 is upper pump casing structural representation of the present utility model;
Fig. 5 is motor casing structural representation of the present utility model;
Fig. 6 is scaffold structural representation of the present utility model;
Fig. 7 is the partial enlarged drawing of Fig. 1;
Fig. 8 is the structural representation after control panel embedding of the present utility model;
Fig. 9 is drainage system structural representation of the present utility model.
Wherein, 1-motor, 11-stator module, 111-stator iron core, 112-staor winding, 113-ring-type yoke portion, 114-teeth groove, 12-rotor assembly, 122-motor shaft, 13-control panel, 131-Hall transducer, 14-motor casing assembly, 141-upper pump casing, the recessed screw thread of 1411-, 1412-anti-rotation groove, 1413-air pressure notch, 142-motor casing, 1421-convex thread, 1422-anti-rotation boss, 1423-buckle boss, 143-scaffold, 1431-buckle, 1432-positioning boss, 1433-rubber stopper, 2-impeller, 3-water pump shell, 4-upper bearing (metal), 41-upper bearing bracket, 42-aligning pad, 43-immersion oil felt, 5-lower bearing, 51-step, 6-water level sensor, 7-flexible pipe, 8-safety check.
Embodiment
Below in conjunction with accompanying drawing, describe optimal technical scheme of the present utility model in detail.
As shown in the figure, the brush DC draining pump of air conditioner of the present utility model, comprise motor 1, impeller 2 and water pump shell 3, motor 1 is single-phase brushless DC motor, motor 1 comprises stator module 11, rotor assembly 12, control panel 13 and motor casing assembly 14, motor casing assembly 14 comprises upper pump casing 141, motor casing 142 and scaffold 143, upper pump casing 141, motor casing 142 is connected successively with scaffold 143, stator module 11 and rotor assembly 12 are installed in the cavity that motor casing 142 and scaffold 143 be connected to form, water pump shell 3 is fixedly connected to form with upper pump casing 141 pump chamber that holds impeller 2, and impeller 2 is arranged on motor shaft 122 one end of rotor assembly 12, control panel 13 is connected with stator module 11, control panel 13 is fixed on the bottom of scaffold 143, control panel 13 comprises non-bridge circuit and the Hall transducer 131 with two power drive switches, two power drive switches of non-bridge circuit are connected respectively to Hall transducer 131.
Wherein, stator module 11 comprises stator iron core 111 and staor winding 112, and stator iron core 111 comprises ring-type yoke portion 113 and some teeth groove 114, and ring-type yoke portion 113 is split structure with teeth groove 114, stator iron core 111 teeth groove numbers are 4, and staor winding 112 adopts double winding form.
Rotor assembly 12 comprises rotor magnetic pole and the motor shaft 122 of 2 pairs of utmost points.
Upper pump casing 141 is connected by seizing type with motor casing 142, the pump chamber inner wall outside edge of upper pump casing 141 is along the circumferential direction intervally distributed with two sections of recessed screw threads 1411, between two sections of recessed screw threads 1411, be provided with two sections of anti-rotation grooves 1412, corresponding motor casing 142 positions of installing are provided with and recessed screw thread 1411, the convex thread 1421 that anti-rotation groove 1412 is suitable and anti-rotation boss 1422, recessed screw thread 1422 coordinates with the direct seizing type of convex thread 1421, the cooperation of anti-rotation boss 1422 and anti-rotation groove 1412 can prevent from carrying out after upper pump casing 141 and motor casing 142 from coordinating the rotation of circumferencial direction.
Motor casing 142 and scaffold 143 carry out interference fit connection by embedded buckle, on the housing outer wall of motor casing 142, along its circumferencial direction, be provided with two symmetrical, length differs buckle boss 1423, at scaffold 142 corresponding positions, be provided with the buckle 1431 suitable with buckle boss 1423.
Between motor shaft 122 and scaffold 143, be provided with upper bearing (metal) 4, between motor shaft 122 and motor casing 142, be provided with lower bearing 5, between upper bearing (metal) 4 and scaffold 143, by upper bearing bracket 41, coordinate, upper bearing bracket 41 is connected on scaffold 142 by ultrasonic welding; Between lower bearing 5 and motor casing 142, by lower axle bed 51, coordinate, between step 51 and motor casing 142, by seizing type, be connected; Between upper bearing bracket 41 and upper bearing (metal) 4, be respectively equipped with aligning pad 42 and immersion oil felt 43 between step 51 and lower bearing 5.
Control panel 13 is installed to the bottom of scaffold 143 by the mode of embedding.
The side wall inner surfaces of scaffold 143 is provided with positioning boss 1432, for locating stator module 11; The bottom of scaffold 143 is provided with a through hole, and in through hole, interference fit has a rubber stopper 1433, and the lighting outlet of control panel 13 is guided outside into by rubber stopper 1433.
Upper pump casing 141 is provided with at least one and is communicated with extraneous air pressure notch 1413, in order to keep brushless electric machine internal cavity and extraneous air pressure balance.
The utility model also provides a kind of drainage system of air conditioner, comprise brush DC draining pump, water level sensor 6, the flexible pipe 7 of above-mentioned air conditioner and be arranged on the safety check 8 on flexible pipe 7, water level sensor 6 is arranged on a side of draining pump, flexible pipe 7 one end are connected with water pump shell 3 water outlets, and the other end is connected with safety check 8 water intakes.
Hall transducer, for detection of the polarity of rotor magnetic pole, provides rotor-position signal according to polarity, and this position signal triggers corresponding power switch in non-bridge circuit and opens and close, and realizes the doublewound conducting in turn of stator.
Aligning pad is in order to adjust the position of upper and lower bearing, and immersion oil felt is lubricated upper and lower bearing.
beneficial effect:
(1) the brushless draining pump of this air conditioner, water pump shell matches with upper pump casing and forms the pump chamber that holds impeller, motor casing and scaffold are connected to form the motor cavity that holds stator module and rotor assembly, the cavity that has a upper pump casing and motor casing to form between pump chamber and motor cavity, with this, water cavity of draining pump work and motor cavity is isolated, make the water power of draining pump isolated, guaranteed the job security of motor; And between upper pump casing, motor casing and scaffold, adopt respectively the Placement of thread type clamping and embedded clamping, and not only assemble solid and reliablely, and technique is simple, easy to operate.
(2) the utility model is applied to control panel in the brushless single phase drain motor of air conditioner and adopts the non-bridge-type control circuit with two power drive switches; utilize Hall transducer detection rotor position; drive controller only adopts 2 power drive switches just can realize the normal commutation of two windings; reduced the usage quantity of components and parts; greatly reduce the rate of fault of drive controller, extended the working life of motor.
(3) control panel adopts the mode of the rear embedding of assembling, after being linked and packed with stator module, be installed to together in scaffold, utilize the positioning boss of scaffold reliably to locate, control panel, near the bottom of scaffold, then carries out embedding to it, does not need Embedding Material amount accurately to control in embedding process, only control panel need be covered can complete embedding completely, dosing technology is simple, cost is low.
(4) in stator module, stator iron core and teeth groove adopt split structure, not only punching separately, make full use of material, reduce waste of material, and embed in ring-type yoke portion after can adopting common winding machine to teeth groove coiling, do not need to adopt special winding machine, save cost of production, simplified production process.
(5) metal (upper adopts split type installation, adopting aligning pad to substitute the spring using in traditional motor with cup rotor adjusts bearing, the sheet metal part that adopts working of plastics bearing support to substitute motor with cup rotor use is controlled position of bearings, step is connected with buckle form with motor casing, upper bearing bracket is connected with ultrasonic welding form with scaffold, and integral installation formula formula is simple, and cost of production is low, for ease of maintenaince, be suitable for batch production; Immersion oil felt is equipped with in bearing support inside, can be lubricated bearing, thereby reduce motor noise, improves working life.
(6) water level sensor that drainage system is installed, can monitor water position status in time, and signal feed back, to air-conditioning system, is controlled to the start and stop of motor then, has both guaranteed the low consumption of motor, can in time condensed water be discharged again, prevents spill and leakage; The safety check that drainage system is installed, when motor of air conditioner quits work, can prevent that the condensed water in air conditioner outer tube from flowing backwards to draining pump, thereby effectively prevent that indoor machine of air conditioner from leaking.
Claims (10)
1. the brush DC draining pump of an air conditioner, it is characterized in that: comprise motor (1), impeller (2) and water pump shell (3), motor (1) is single-phase brushless DC motor, motor (1) comprises stator module (11), rotor assembly (12), control panel (13) and motor casing assembly (14), motor casing assembly comprises upper pump casing (141), motor casing (142) and scaffold (143), upper pump casing (141), motor casing (142) is connected successively with scaffold (143), stator module (11) and rotor assembly (12) are installed in the cavity that motor casing (142) and scaffold (143) be connected to form, water pump shell (3) is fixedly connected to form with upper pump casing (141) pump chamber that holds impeller (2), and impeller (2) is arranged on motor shaft (122) one end of rotor assembly (12), control panel (13) is fixed on the bottom of scaffold (143).
2. the brush DC draining pump of air conditioner as claimed in claim 1, is characterized in that: upper pump casing (141) is provided with at least one and is communicated with extraneous in order to keep the air pressure notch (1413) of brushless electric machine internal cavity and extraneous air pressure balance.
3. the brush DC draining pump of air conditioner as claimed in claim 1, it is characterized in that: stator module (11) comprises stator iron core (111) and staor winding (112), stator iron core (111) comprises ring-type yoke portion (113) and some teeth groove (114), ring-type yoke portion (113) is split structure with teeth groove (114), stator iron core (113) teeth groove number is 4, staor winding (112) adopts double winding form, and rotor assembly (12) comprises rotor magnetic pole and the motor shaft (122) of 2 pairs of utmost points.
4. the brush DC draining pump of air conditioner as claimed in claim 1, it is characterized in that: control panel (13) comprises non-bridge circuit and the Hall transducer (131) with two power drive switches, and two power drive switches of non-bridge circuit are connected respectively to Hall transducer (131).
5. the brush DC draining pump of air conditioner as claimed in claim 1, it is characterized in that: upper pump casing (141) is connected by seizing type with motor casing (142), the pump chamber inner wall outside edge of upper pump casing (141) is along the circumferential direction intervally distributed with two sections of recessed screw threads (1411), between two sections of recessed screw threads (1411), be provided with two sections of anti-rotation grooves (1412), corresponding motor casing (142) position of installing is provided with and recessed screw thread (1411), the convex thread (1421) that anti-rotation groove (1412) is suitable and anti-rotation boss (1422), recessed screw thread (1411) coordinates with the direct seizing type of convex thread (1421).
6. the brush DC draining pump of air conditioner as claimed in claim 1, it is characterized in that: motor casing (142) and scaffold (143) carry out interference fit connection by embedded buckle, on the housing outer wall of motor casing (142), along its circumferencial direction, be provided with symmetrical, length differs two buckle boss (1423), at scaffold (143) corresponding position, be provided with the buckle (1431) suitable with buckle boss (1423).
7. the brush DC draining pump of air conditioner as claimed in claim 1, it is characterized in that: between motor shaft (122) and scaffold (143), be provided with upper bearing (metal) (4), between motor shaft (122) and motor casing (142), be provided with lower bearing (5), between upper bearing (metal) (4) and scaffold (143), by upper bearing bracket (41), coordinate, upper bearing bracket (41) is connected on scaffold (143) by ultrasonic welding; Between lower bearing (5) and motor casing (142), by lower axle bed (51), coordinate, between step (51) and motor casing (142), by seizing type, be connected; Between upper bearing bracket (41) and upper bearing (metal) (4), be respectively equipped with aligning pad (42) and immersion oil felt (43) between step (51) and lower bearing (5).
8. the brush DC draining pump of air conditioner as claimed in claim 1, is characterized in that: control panel (13) is installed to the bottom of scaffold (143) by the mode of embedding.
9. the brush DC draining pump of the air conditioner as described in any one claim in claim 1 to 8, is characterized in that: the side wall inner surfaces of scaffold (143) is provided with positioning boss (1432), for locating stator module (11); The bottom of scaffold (143) is provided with a through hole, and in through hole, interference fit has a rubber stopper (1433), and the lighting outlet of control panel (143) is guided outside into by rubber stopper (1433).
10. the drainage system of an air conditioner, it is characterized in that: comprise brush DC draining pump, water level sensor (6), the flexible pipe (7) of above-mentioned air conditioner and be arranged on the safety check (8) on flexible pipe (7), water level sensor (6) is arranged on a side of draining pump, flexible pipe (7) one end is connected with water pump shell (3) water outlet, and the other end is connected with safety check (8) water intake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420402167.6U CN203948312U (en) | 2014-07-21 | 2014-07-21 | Brush DC draining pump and the drainage system of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420402167.6U CN203948312U (en) | 2014-07-21 | 2014-07-21 | Brush DC draining pump and the drainage system of air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203948312U true CN203948312U (en) | 2014-11-19 |
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ID=51890349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420402167.6U Expired - Fee Related CN203948312U (en) | 2014-07-21 | 2014-07-21 | Brush DC draining pump and the drainage system of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203948312U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564704A (en) * | 2014-12-23 | 2015-04-29 | 中山市固邦电器有限公司 | Special drain pump of environmental protection air conditioner |
| CN113937943A (en) * | 2021-10-15 | 2022-01-14 | 合肥新沪屏蔽泵有限公司 | Motor cabinet and pump assembly |
| CN114060285A (en) * | 2020-08-07 | 2022-02-18 | 日立安斯泰莫株式会社 | Two-stage centrifugal pump |
| DE102022200611A1 (en) | 2022-01-20 | 2023-07-20 | Robert Bosch Gesellschaft mit beschränkter Haftung | Electric drive motor |
-
2014
- 2014-07-21 CN CN201420402167.6U patent/CN203948312U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564704A (en) * | 2014-12-23 | 2015-04-29 | 中山市固邦电器有限公司 | Special drain pump of environmental protection air conditioner |
| CN114060285A (en) * | 2020-08-07 | 2022-02-18 | 日立安斯泰莫株式会社 | Two-stage centrifugal pump |
| CN114060285B (en) * | 2020-08-07 | 2023-08-25 | 日立安斯泰莫株式会社 | Two-stage centrifugal pump |
| CN113937943A (en) * | 2021-10-15 | 2022-01-14 | 合肥新沪屏蔽泵有限公司 | Motor cabinet and pump assembly |
| CN113937943B (en) * | 2021-10-15 | 2023-02-03 | 合肥新沪屏蔽泵有限公司 | Motor cabinet and pump assembly |
| DE102022200611A1 (en) | 2022-01-20 | 2023-07-20 | Robert Bosch Gesellschaft mit beschränkter Haftung | Electric drive motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 |
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| CF01 | Termination of patent right due to non-payment of annual fee |