CN109681473A - A kind of fluid pump and household electrical appliance - Google Patents
A kind of fluid pump and household electrical appliance Download PDFInfo
- Publication number
- CN109681473A CN109681473A CN201910160909.6A CN201910160909A CN109681473A CN 109681473 A CN109681473 A CN 109681473A CN 201910160909 A CN201910160909 A CN 201910160909A CN 109681473 A CN109681473 A CN 109681473A
- Authority
- CN
- China
- Prior art keywords
- flange
- pump
- heating element
- pump case
- fluid 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 15
- 238000002788 crimping Methods 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 description 5
- 230000003750 conditioning effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000004851 dishwashing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 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
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
-
- 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
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Cookers (AREA)
Abstract
It is intracavitary by the way that heating element is placed directly within heat pump the invention discloses a kind of fluid pump and household electrical appliance, heating element is directly contacted, and by heating element designs be helical structure with water, while solving device miniaturization, it is high to improve heating efficiency.Further, fluid pump control unit structure provided by the present invention is simple, not complicated temperature transferring structure and the Heat Conduction Material for requiring thermal conductivity good, therefore fluid pump provided by the present invention is easily manufactured, it is easy to spread, in the device that may be used on various household electrical appliance or heating flow media.
Description
Technical field
The present invention relates to intelligent appliance equipment technical field more particularly to a kind of fluid pump and household electrical appliance.
Background technique
The existing fluid pump with heating function, it includes: upper and lower pump case that structure, which is generally, the leaf that is installed in pump case
Wheel, the motor of driving wheel rotation and the heating unit for heating fluid.
There are two types of types for heating technique used in heating unit in the prior art: one is tubular heating element, in addition
One kind is heating membrane technology, wherein its calandria of tubular heating element is embedding in a ring groove by welding, and annular groove is direct with water
Contact, is integrated with temperature control equipment on calandria.The heating unit and pump case are fixed on by riveting or crimping with pump case
Together.The type heat pump is compact-sized, but has apparent defect:
The first, the thermal efficiency is low, and heating element is not directly contacted with water, but passes through crimping by the annular groove that a section is rectangle
Or be welded to connect, heat passes through 2 or 3 side heat transfer of rectangular channel, and in addition one or both sides are directly exposed to air,
Heat loss is big；
The second, electrothermal tube power density is very high, and reliability is low, and the service life has an impact.It is limited to the size of annular groove, heating element is not
There may be too big heat dissipation area, therefore, power density is very high, is greater than 50W/cm2, the bladdery feelings in part in water flow
Under condition, it is easy to which, because local dry burning causes the failure of heating element, reliability is low.
Third, structure have arrived the limit, cannot further reduce size, and the application scenarios of pony pump can not be applied.
Therefore, the existing technology needs further improvement.
Summary of the invention
In view of the above shortcomings in the prior art, the purpose of the present invention is to provide a kind of fluid pump and household electrics
Device, overcomes that the fluid pump thermal efficiency in the prior art is low, reliability is low and the compact-sized defect for having reached the limit.
First embodiment provided by the invention is a kind of fluid pump, wherein includes: pump case, the leaf that is mounted on inside pump case
Wheel and heating element are connected to pump case top and the water inlet pipe on side and outlet pipe, for that will connect into the water inlet pipe
The flange being connected on pump case, and the temperature control element of the flange upper surface is set；
It is heating pump chamber in the pump case；The impeller setting is intracavitary in the heat pump；The impeller is mounted on and the pump
On the machine shaft that shell bottom is connected；
The heating element is arranged above the impeller, helically structure；The upper helical port of the helical structure and lower spiral shell
Rotation port both passes through the flange upper surface and extends on the outside of pump case.
Optionally, the flange is connected with heating element by a heat transfer element, the top of the heat transfer element and method
Blue lower surface fits, and the heat transfer element is fastened on the helical structure of the heating element.
Optionally, the heating element is double helix or single layer structure.
Optionally, the lateral surface of the double helix of the heating element, which is provided with, keeps away a semi-circular recesses, under described
The inner surface that a semi-circular recesses are kept away described in helical port abutting extends on the outside of the pump case of flange upper surface.
Optionally, the heat transfer element includes: heat transfer element ontology and the thermally conductive sheet that ontology front end is arranged in；
The thermally conductive sheet is arranged between the flange undersurface and heating element helical structure upper surface；The heat transfer element sheet
There are two semi-circular card hole compatible with the curved surface of helical structure, another side are set as long respectively for a side setting of body
Square plate structure.
Optionally, the top of the heat transfer element is arranged in the temperature conditioning unit.
Optionally, the outside of the water outlet is arranged in the temperature control element.
Optionally, by buckling, crimping is fixed on pump case the flange or the flange is fixed by rivet
On pump case.
Optionally, the upper port of the pump case is additionally provided with circular groove, and sealing ring, institute are equipped in the circular groove
It states and sealing structure is formed by sealing ring between pump case and flange.
Second embodiment provided by the invention is a kind of household electrical appliance, wherein includes: described in claim any one of 1-9
Fluid pump.
Beneficial effect, the invention discloses a kind of fluid pump and household electrical appliance, by the way that heating element is placed directly within heating
It in pump chamber, and is helical structure by heating element designs, while solving device miniaturization, since heating element is direct with water
Contact, heating efficiency are high.Further, fluid pump control unit structure provided by the present invention is simple, and complicated temperature does not pass
The Heat Conduction Material passed structure and require thermal conductivity good, therefore fluid pump provided by the present invention is easily manufactured, it is easy to spread, it can answer
In the device for using various household electrical appliance or heating flow media.
Detailed description of the invention
Fig. 1 is fluid pump structure decomposition diagram described in first embodiment of the invention；
Fig. 2 is the structural schematic diagram of heating element in fluid pump provided by the invention；
Fig. 3 is the structural schematic diagram of the middle heat transfer element of fluid pump provided by the present invention；
Fig. 4 is the sectional view of fluid pump provided by the present invention；
Fig. 5 is the three-dimensional structure diagram of fluid pump provided by the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and do not have to
It is of the invention in limiting.
First embodiment provided by the invention is a kind of fluid pump, as shown in Figure 1, comprising: pump case 108 is mounted on pump case
Impeller 107 and heating element 106 inside 108 are connected to 108 top of pump case and water inlet pipe and outlet pipe on side
101, the flange 103 for will be connected into the water inlet pipe on pump case, and the temperature control of 103 upper surface of flange is set
Element 102.
It is heating pump chamber in the pump case；The setting of impeller 107 is intracavitary in the heat pump；The impeller 107 is installed
On the machine shaft being connected with 108 bottom of pump case.
The heating element 106 is arranged above the impeller 107, helically structure；The upper spiral of the helical structure
Port and lower helical port both pass through 103 upper surface of flange and extend on the outside of pump case.
The bottom of fluid pump provided by the present invention is provided with motor, and the motor is for driving wheel rotation.The stream
The heat pump of body pump is intracavitary not to be provided only with impeller, is also additionally provided with heating element for heating.The heating element is direct
It is in contact with hot medium to be added, the interaction of heat is directly carried out, to improve the efficiency of heating.
Further, in order to meet the needs of fluid pump miniaturization, as shown in connection with fig. 2, heating provided in the present invention
Element is set as helical structure or single layer structure, can be the double-layer spiral placing heating wire in metal tube and designing
Structure or individual layer annulus shape structure.Therefore heating element metal tube used in concrete application embodiment is set as
Helical structure or corresponding circular ring structure, the upper helical port at both ends and lower helical port (or the upper end of single circular ring structure
Mouthful and lower port) both pass through the flange upper surface and extend on the outside of pump case.
Preferably, it is minimized to more have using entire fluid pump, the heating element 106 is double helix.Institute
The lateral surface for stating the double helix of heating element 106, which is provided with, keeps away a semi-circular recesses, and the lower helical port is close to institute
It states and keeps away the inner surfaces of a semi-circular recesses and extend to the outside of pump case 108 of 103 upper surface of flange.To keep away position semicircle recessed due to described
The presence of slot, so that the structure of the heating element 103 is similar to heart-shaped structure.
During concrete application is implemented, preferably, fluid pump provided by the present invention uses two layers of helical structure, therefore structure letter
Single, compact, heater element power density is low, is lower than 30W/cm2, and due to connecting between helical structure with hot medium to be added
Touching, heating efficiency are high.In a practical example, the outer diameter of pump case only has 78.5mm, power 1800W, the power of heating element
Density only has 22.85W/cm2, pump case diameter 91mm, heating power density 51W/cm relative to existing design2Effect is obvious.
Abnormal reaction speed is detected when (such as when fluid pump is in dry combustion method) fluid pump heating exception in order to improve
Degree, the flange 103 are connected with heating element 106 by a heat transfer element 105, the top of the heat transfer element 105 and method
Blue 103 lower surfaces fit, and the heat transfer element 105 is fastened on the helical structure of the heating element 106.The temperature control list
The top of the heat transfer element 105 is arranged in member 102.
Since the heat transfer element 105 is connected with heating element 106 and flange 103 respectively, by flange and heating element
106 are connected as one, therefore can be by the heat transfer of heating element 106 to the temperature conditioning unit being located on 103 upper surface of flange
102, so that the perception heating in time of temperature conditioning unit 102 is abnormal.
Specifically, as shown in figure 3, the heat transfer element 105 includes: heat transfer element ontology 1052 and is arranged in ontology front end
Thermally conductive sheet 1051；
The thermally conductive sheet 1051 is arranged between 106 helical structure upper surface of 103 lower surface of flange and heating element；It is described
There are two semi-circular card holes compatible with the curved surface of helical structure respectively for a side setting of heat transfer element ontology 1052, separately
A side is set as rectangular flat plate structure.
The upper surface of the thermally conductive sheet 1051 is fixed on the lower surface of flange 103, the lower surface of the thermally conductive sheet 1051
It is fitted on the upper surface of the helical structure, and the semicircle card hole is adapted with the curved surface of helical structure, so that half
Round card hole can be buckled on the spiral winding of the helical structure.Due to the heat transfer paper and flange and heating element
It is connected, therefore can be by the heat transfer of heating element to flange face, the temperature control element on flange face can determine whether to receive
Whether the heat arrived is abnormal, reacts in time.
In order to preferably receive the heat of transmitting, the heating temperature situation of heat medium is judged, preferably, the temperature
The outside of the outlet pipe is arranged in control element 102.
Further, the buckle of multiple crimping is set on pump case, and the flange 103 is fixed on pump case by buckling crimping
On 108.It is provided on flange 103 and is easy to be plastically deformed volume opening, be easily installed.Likewise, can also by other means by
Flange is fixed on pump case, will be fixedly linked between upper and lower pump case, such as: the flange can also be fixed on by rivet
On pump case 108.
Preferably, in order to increase the sealing performance of the fluid pump entirety, the upper port of the pump case 108 is additionally provided with circle
Connected in star is equipped with sealing ring 104 in the circular groove, passes through 104 groups of sealing ring between the pump case 108 and flange 103
At sealing structure.
The sealing structure disclosed in this invention, can not only obtain preferable sealing effect, can also be preferably sharp
In the temperature conditioning unit in pump case in heat transfer to flange, the reactivity of temperature conditioning unit control heat medium is further improved
Energy.
In conjunction with Fig. 4, the sectional view of fluid pump provided by the present invention, it can be seen that fluid pump knot provided by the present invention
Structure is simple, and compact layout between all parts.Wherein, the helical structure of heating element and directly go deep into that heat pump is intracavitary can
With obtain it is lesser occupy space and obtain higher heating effect, and the design of heat transfer element can preferably improve heating
Abnormal reaction speed, the design of sealing ring further improve the sealing performance and heat transfer of entire fluid pump.Such as Fig. 5 institute
It is shown as the three-dimensional structure diagram of fluid pump provided by the present invention, is based on shown in Fig. 4 and Fig. 5, it is available, it is provided by the present invention
Fluid pump design is simple, easily controllable, and sealing performance is high, and not complicated temperature conducting structure and high thermal conductivity
Heat Conduction Material requirement, the application scenarios suitable for a variety of heating liquids.
Second embodiment provided by the invention is a kind of household electrical appliance, comprising: the fluid pump.
The household electrical appliance can be with are as follows: dish-washing machine or washing machine.It is envisioned that due to stream provided by the present invention
Body pump is small, and heating efficiency is high, it is abnormal to reflect heating in time, therefore can work as and fluid pump provided by the present invention is used to pacify
After being attached in the domestic electric appliances such as dish-washing machine, washing machine, available preferable heating effect.
It is intracavitary by the way that heating element is placed directly within heat pump the invention discloses a kind of fluid pump and household electrical appliance, it will
Heating element is directly contacted with water, and by heating element designs be helical structure, while solving device miniaturization, improve
Heating efficiency is high.Further, fluid pump control unit structure provided by the present invention is simple, not complicated temperature transferring structure
And the Heat Conduction Material for requiring thermal conductivity good, therefore fluid pump provided by the present invention is easily manufactured, and it is easy to spread, it may be used on each
In the device of kind household electrical appliance or heating flow media.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement all should belong to the guarantor of appended claims of the invention
Protect range.
Claims (10)
1. a kind of fluid pump characterized by comprising pump case, the impeller being mounted on inside pump case and heating element are separately connected
Water inlet pipe and outlet pipe at the top of the pump case and on side, for the water inlet pipe to be connected to the flange on pump case, Yi Jishe
Set the temperature control element in the flange upper surface；
It is heating pump chamber in the pump case；The impeller setting is intracavitary in the heat pump；The impeller is mounted on and the pump
On the machine shaft that shell bottom is connected；
The heating element is arranged above the impeller, helically structure；The upper helical port of the helical structure and lower spiral shell
Rotation port both passes through the flange upper surface and extends on the outside of pump case.
2. fluid pump according to claim 1, which is characterized in that the flange passes through a heat transfer element phase with heating element
Connection, top and the flange undersurface of the heat transfer element fit, and the heat transfer element is fastened on the spiral shell of the heating element
It revolves in structure.
3. fluid pump according to claim 2, which is characterized in that the heating element is double helix or single layer knot
Structure.
4. fluid pump according to claim 3, which is characterized in that the lateral surface of the double helix of the heating element
It is provided with and keeps away a semi-circular recesses, the inner surface that a semi-circular recesses are kept away described in the lower helical port abutting extends on flange
On the outside of the pump case on surface.
5. according to the described in any item fluid pumps of claim 2-4, which is characterized in that the heat transfer element includes: heat transfer element
Ontology and the thermally conductive sheet that ontology front end is set；
The thermally conductive sheet is arranged between the flange undersurface and heating element helical structure upper surface；The heat transfer element sheet
There are two semi-circular card hole compatible with the curved surface of helical structure, another side are set as long respectively for a side setting of body
Square plate structure.
6. fluid pump according to claim 2, which is characterized in that the upper of the heat transfer element is arranged in the temperature control element
Side.
7. fluid pump according to claim 1, which is characterized in that the outer of the outlet pipe is arranged in the temperature control element
Side.
8. fluid pump according to claim 1, which is characterized in that the flange is fixed on pump case by buckling crimping,
Or the flange is fixed on pump case by rivet.
9. fluid pump according to claim 1, which is characterized in that the upper port of the pump case is additionally provided with circular groove,
Sealing ring is installed in the circular groove, sealing structure is formed by sealing ring between the pump case and flange.
10. a kind of household electrical appliance characterized by comprising the described in any item fluid pumps of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910160909.6A CN109681473B (en) | 2019-03-04 | 2019-03-04 | Fluid pump and household appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910160909.6A CN109681473B (en) | 2019-03-04 | 2019-03-04 | Fluid pump and household appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109681473A true CN109681473A (en) | 2019-04-26 |
| CN109681473B CN109681473B (en) | 2021-04-13 |
Family
ID=66197427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910160909.6A Active CN109681473B (en) | 2019-03-04 | 2019-03-04 | Fluid pump and household appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109681473B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706520A (en) * | 2020-06-19 | 2020-09-25 | 佛山市威灵洗涤电机制造有限公司 | Shell assembly of electric pump, electric pump and dish washing machine |
| CN112922901A (en) * | 2019-12-06 | 2021-06-08 | 佛山市威灵洗涤电机制造有限公司 | Heating device of heater and integrated heating pump |
| CN112921596A (en) * | 2019-12-06 | 2021-06-08 | 佛山市威灵洗涤电机制造有限公司 | Heating pump assembly and washing device |
| US11892009B2 (en) | 2022-03-16 | 2024-02-06 | Backer Heating Technologies (Shenzhen) Co., Ltd. | Blade-heating heat pump cover and heat pump |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN217055695U (en) * | 2022-01-20 | 2022-07-26 | 贝克电热科技（深圳）有限公司 | Heating pump cover and heating pump |
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| DE3534754A1 (en) * | 1985-09-28 | 1987-04-02 | Bauknecht Hausgeraete | Electric continuous flow heater for domestic appliances |
| EP1787567A2 (en) * | 2005-11-17 | 2007-05-23 | I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini | Dishwasher pump |
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| CN208203591U (en) * | 2018-05-25 | 2018-12-07 | 三花亚威科电器设备（芜湖）有限公司 | Pump |
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| DE3534754A1 (en) * | 1985-09-28 | 1987-04-02 | Bauknecht Hausgeraete | Electric continuous flow heater for domestic appliances |
| EP1787567A2 (en) * | 2005-11-17 | 2007-05-23 | I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini | Dishwasher pump |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922901A (en) * | 2019-12-06 | 2021-06-08 | 佛山市威灵洗涤电机制造有限公司 | Heating device of heater and integrated heating pump |
| CN112921596A (en) * | 2019-12-06 | 2021-06-08 | 佛山市威灵洗涤电机制造有限公司 | Heating pump assembly and washing device |
| CN111706520A (en) * | 2020-06-19 | 2020-09-25 | 佛山市威灵洗涤电机制造有限公司 | Shell assembly of electric pump, electric pump and dish washing machine |
| CN111706520B (en) * | 2020-06-19 | 2021-08-27 | 佛山市威灵洗涤电机制造有限公司 | Shell assembly of electric pump, electric pump and dish washing machine |
| US11892009B2 (en) | 2022-03-16 | 2024-02-06 | Backer Heating Technologies (Shenzhen) Co., Ltd. | Blade-heating heat pump cover and heat pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109681473B (en) | 2021-04-13 |
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