A micro double-head drainage pump and a washing machine having the same

Abstract

The utility model discloses a kind of micro double-end drainage pumps and washing machine with the pump, wherein, double-end drainage pump includes: pump shell, first drainage motor and second drainage motor and tubular filter installed on pump shell, pump shell includes first communication pipeline for water inlet, second communication pipeline for water outlet and water outlet cavity communicated with second communication pipeline and water outlet pipe communicated with water outlet cavity, the water inlet of first drainage motor and second drainage motor is connected water outlet cavity 1 port respectively, tubular filter is inserted into first communication pipeline along pipe axis x, pump shell is integrally injection molded, and the pump axis y of coaxial centrifugal pump of first drainage motor is perpendicular to pipe axis x, the pump axis z of coaxial centrifugal pump of second drainage motor is perpendicular to pump axis y, pump axis z and pipe axis x are not in the same plane, the side wall of first communication pipeline is communicated with second communication pipeline, filter side is placed in second communication pipeline, whole pump structure is more compact, reduce the installation space of pump.

Description

Technical Field

[0001] This utility model relates to a miniature dual-head drain pump and a washing machine having the pump. The IPC classification number may be D06F39 / 08, F04D 12 / 12, or F04D 13 / 06. Background Technology

[0002] Currently, the filter in a dual-head drain pump is typically installed in the same direction as the outlet chamber, on the same side as the motor, while the inlet is located on the filter side. The filter prevents pressure loss in the outlet chamber and facilitates drainage. However, due to space constraints within the washing machine, the filter needs to be installed in a different direction from the outlet chamber and on a different side from the motor for a more compact installation. Therefore, it is necessary to design a dual-head drain pump with a side-mounted filter to meet these installation requirements.

[0003] Relevant common knowledge and terminology can be found in Chinese patents CN105986427A and CN118793632A, the 1978-1983 edition or 1997 second edition of *Mechanical Engineering Handbook* and *Electrical Engineering Handbook* published by Machinery Industry Press, the 2014 first edition of *Pump Theory and Technology* published by Machinery Industry Press, and the national standard GB / T 7021 *Centrifugal Pump Terminology*. The term "drainage motor" originates from existing technologies such as CN105986427A and belongs to the coaxial centrifugal pump described in GB / T 7021, and is typically a miniature canned motor pump. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a dual-head drain pump and a washing machine incorporating it, which can avoid the sealing problems of dual-head drain pumps.

[0005] In a first aspect, this utility model provides a miniature dual-head drainage pump, comprising: a pump casing, a first drainage motor and a second drainage motor mounted on the pump casing, and a tubular filter. The pump casing includes a first connecting pipe for water inlet, a second connecting pipe for water outlet, an outlet chamber connected to the second connecting pipe, and an outlet pipe connected to the outlet chamber. The inlets of the first drainage motor and the second drainage motor are each connected to the outlet port of the outlet chamber. The tubular filter is inserted into the first connecting pipe along the pipe axis x. The drainage motor includes a first drainage motor and a second drainage motor. The pump casing is integrally injection molded, and the pump axis y of the coaxial centrifugal pump of the first drainage motor is perpendicular to the pipe axis x. The pump axis z of the coaxial centrifugal pump of the second drainage motor is perpendicular to the pump axis y. The pump axis z and the pipe axis x are not on the same plane. The side wall of the first connecting pipe is connected to the second connecting pipe.

[0006] The miniature dual-head drain pump according to the present invention has at least the following beneficial effects: by installing a filter in the first connecting pipe along the pipe axis x, and the pump axis y of the coaxial centrifugal pump of the first drain motor being perpendicular to the pipe axis x of the tubular filter, and the pump axis z of the coaxial centrifugal pump of the second drain motor being perpendicular to the pump axis y of the coaxial centrifugal pump, the first connecting pipe and the second connecting pipe are vertically connected. At the same time, the pump casing is integrally injection molded, making the overall structure of the miniature dual-head drain pump more compact, the axial space occupied is smaller, and the installation in household appliances such as washing machines is more convenient.

[0007] According to some embodiments of this utility model, a cylindrical guide sleeve is embedded in the water outlet cavity. A first guide hole is provided in the center of the guide sleeve, and an annular flange is provided on the outer side wall. An annular boss is provided on the inner side wall of the water outlet cavity. The flange abuts against the boss to axially limit the guide sleeve.

[0008] According to some embodiments of this utility model, a second guide hole is provided on the side wall of the guide sleeve, and the second guide hole is connected to the water outlet pipe. The second guide hole is used to guide the water flow to the water outlet pipe.

[0009] According to some embodiments of the present invention, the outer wall of the flow guide sleeve is formed with a positioning rib extending axially, and the inner wall of the boss is provided with a positioning groove corresponding to the positioning rib. The positioning rib is embedded in the positioning groove so that the second flow guide hole is aligned with the water outlet pipe.

[0010] According to some embodiments of this utility model, the bottom of the flow guide sleeve is provided with several vent holes, which are opened around the first flow guide hole. The vent holes can discharge air from the water chamber, reducing the noise generated.

[0011] According to some embodiments of this utility model, a sealing ring is provided on the first drainage motor and the second drainage motor respectively. The sealing ring abuts against the end face of the guide sleeve, thereby axially limiting the guide sleeve and improving the sealing performance of the water outlet cavity.

[0012] According to some embodiments of this utility model, the side wall of the filter is provided with filter holes, and the first connecting pipe is connected to the second connecting pipe through the filter holes. The filter holes can filter the water passing through the first connecting pipe and remove impurities.

[0013] Secondly, this utility model provides a washing machine, including a first mounting plate, a second mounting plate, and a miniature dual-head drain pump as described in the first aspect. The second connecting pipe is provided with a mounting portion integrally formed with the pump housing. The dual-head drain pump is mounted on the first mounting plate and the second mounting plate via the mounting portion. The first mounting plate and the second mounting plate make the installation of the dual-head drain pump more secure.

[0014] According to some embodiments of this utility model, the top of the mounting part is provided with a bent portion that connects to the first mounting plate, and the bent portion is provided with reinforcing ribs. This strengthens the bent portion and makes the installation of the miniature dual-head drainage pump more stable.

[0015] According to some embodiments of the present invention, the bottom of the mounting part is provided with a track-shaped mounting groove, and the second mounting plate is partially embedded in the mounting groove for fixing the bottom of the miniature double-headed drainage pump. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0017] Figure 1 This is an overall schematic diagram of a miniature dual-head drainage pump provided in one embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Partial exploded view of the miniature dual-head drain pump shown;

[0019] Figure 3 yes Figure 2 The diagram shows the overall shape of the guide sleeve.

[0020] Figure 4 yes Figure 3 Another overall schematic diagram of the flow guide sleeve is shown;

[0021] Figure 5 This is an overall schematic diagram of a miniature dual-head drainage pump provided in another embodiment of the present invention;

[0022] Figure 6 yes Figure 5 Rear view of the miniature dual-head drain pump shown;

[0023] Figure 7 yes Figure 1 A schematic diagram of the overall structure of the miniature dual-head drainage pump is shown.

[0024] Icon labels:

[0025] Pump casing 100; first connecting pipe 110; second connecting pipe 120; outlet chamber 130; boss 131; positioning groove 132; outlet pipe 140; mounting part 150; bending part 151; mounting groove 152; reinforcing rib 153; drainage motor 200; impeller 210; sealing ring 220; first drainage motor 230; second drainage motor 240; tubular filter 300; filter hole 310; guide sleeve 400; first guide hole 410; flange 420; second guide hole 430; positioning rib 440; vent hole 450; first mounting plate 500; second mounting plate 600. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figure 1 and Figure 2The miniature dual-head drainage pump includes: a pump housing 100, a first drainage motor 230 and a second drainage motor 240 mounted on the pump housing 100, and a tubular filter 300. The pump housing 100 is integrally injection molded and includes a first connecting pipe 110 for water inlet, a second connecting pipe 120 for water outlet, a water outlet chamber 130 connected to the second connecting pipe 120, and a water outlet pipe 140 connected to the water outlet chamber 130. The inlets of the first drainage motor 230 and the second drainage motor 240 are each connected to one port of the water outlet chamber 130. The tubular filter 300... The tubular filter is installed along its axis x within the first connecting pipe 110. The side wall of the first connecting pipe 110 is connected to the second connecting pipe 120. The pump axis y of the coaxial centrifugal pump of the first drainage motor 230 is perpendicular to the pipe axis x, and the pump axis z of the coaxial centrifugal pump of the second drainage motor 240 is perpendicular to the pump axis y. The pump axis z and the pipe axis x are not on the same plane. Therefore, the tubular filter 300 is also perpendicular to the second connecting pipe 120. As a result, the overall structure of the miniature dual-head drainage pump is more compact, and the installation space is greatly reduced. A cylindrical guide sleeve 400 is embedded in the inner wall of the outlet chamber 130. A first guide hole 410 is provided in the center of the guide sleeve 400. When the miniature dual-head drainage pump is working, the water flows through the first guide hole 410 into the outlet chamber 130. The impeller 210 of the drainage motor 200 rotates, and the water flows out from the outlet pipe 140 under the action of centrifugal force. Therefore, there is no need to prevent the outlet chamber 130 from depressurizing through the tubular filter 300, nor is it necessary to disassemble the first connecting pipe 110 and the second connecting pipe 120 for separate injection molding and reassembly, thus avoiding the risk of water leakage. The miniature dual-head drain pump has two outlet chambers 130 and outlet pipes 140. One outlet pipe 140 is used for drainage, and the other outlet pipe 140 is used for water circulation and reuse.

[0031] Understandably, in order to meet the water output requirements of the miniature dual-head drainage pump, the diameter of the first guide hole 410 is 15% to 20% larger than the diameter of the outlet pipe 140. In this embodiment, the diameter of the first guide hole 410 is preferably 20 mm, and the diameter of the outlet pipe 140 is preferably 17.5 mm.

[0032] refer to Figures 2 to 4The outer wall of the guide sleeve 400 is provided with an annular flange 420, and the inner wall of the outlet cavity 130 is provided with an annular boss 131. When the guide sleeve 400 is installed, the flange 420 is engaged with the boss 131 to axially limit the guide sleeve 400. The side wall of the guide sleeve 400 is also provided with a second guide hole 430, which communicates with the outlet pipe 140. When the drainage motor 200 is working, the water in the outlet cavity 130 is guided to the outlet pipe 140 through the second guide hole 430, thereby improving drainage efficiency. In addition, the outer side wall of the guide sleeve 400 is provided with a positioning rib 440, and the inner side wall of the boss 131 is provided with a positioning groove 132 corresponding to the positioning rib 440, which is used to position the second guide hole 430 and the water outlet pipe 140. The positioning rib 440 extends in the axial direction. When the guide sleeve 400 is installed, the positioning rib 440 is embedded in the positioning groove 132, so that the second guide hole 430 is aligned with the water outlet pipe 140. At the same time, it also prevents the guide sleeve 400 from circumferentially displacing, and prevents the side wall of the guide sleeve 400 from reducing the water output or not outputting water due to blocking the water outlet pipe 140.

[0033] Still referencing Figures 2 to 4 The bottom of the guide sleeve 400 is provided with several vent holes 450, which are located around the first guide hole 410. The vent holes 450 have a diameter of 5mm and can expel air from the outlet chamber 130, thereby reducing the noise of the miniature dual-head drainage pump during operation. Specifically, when the miniature dual-head drainage pump is in standby mode, the outlet chamber 130 is filled with air. During operation, water flows in from the inlet, passes through the first connecting pipe 110 and the second connecting pipe 120, and then enters the outlet chamber 130, forcing the air in the outlet chamber 130 out through the vent holes 450, thus eliminating the air in the outlet chamber 130 and reducing the noise of the miniature dual-head drainage pump during operation.

[0034] It is understood that the number of drain holes can be set according to actual needs, and no specific limit is made here. The more drain holes there are, the better the venting effect. However, too many vent holes 450 will cause the water outlet chamber 130 to depressurize and fail to drain. In this embodiment, the number of vent holes 450 is preferably 2.

[0035] refer to Figure 2 and Figure 7 Each of the first drainage motor 230 and the second drainage motor 240 has a sealing ring 220 fitted on its end face, which abuts against the end face of the guide sleeve 400. Specifically, during installation, the end face of the outlet chamber 130 of the drainage motor 200 abuts against a portion of the end face of the drainage motor 200, and the end face of the guide sleeve 400 abuts against the sealing ring 220 fitted on the drainage motor 200, further improving the sealing performance of the outlet chamber 130 and preventing water leakage from the outlet chamber 130.

[0036] refer to Figure 2The filter 300 has filter holes 310 on its side wall, through which the first connecting pipe 110 is connected to the second connecting pipe 120. When water enters the first connecting pipe 110, the water flows through the filter holes 310, filtering out impurities, and then enters the second connecting pipe 120 and is discharged from the drain pipe. Because the filter holes 310 filter out impurities, it prevents impurities from entering the drain motor 200 and damaging it, and also reduces noise caused by impurities.

[0037] refer to Figure 1 , Figure 5 and Figure 6 One embodiment of the washing machine of this application includes a first mounting plate 500, a second mounting plate 600, and a miniature dual-head drain pump as described in any of the above embodiments. A second connecting pipe 120 is provided with a mounting portion 150 integrally formed with the pump housing 100. The miniature dual-head drain pump is mounted on the first mounting plate 500 and the second mounting plate 600 via the mounting portion 150. Specifically, the top of the mounting portion 150 is provided with a bent portion 151 connected to the first mounting plate 500, and the bottom of the mounting portion 150 is provided with a track-shaped mounting groove 152. The second mounting plate 600 is partially embedded in the mounting groove 152 to fix the bottom of the miniature dual-head drain pump, thereby stably fixing the miniature dual-head drain pump to the two mounting plates. A reinforcing rib 153 is provided on the bent portion 151 to further strengthen the bending portion 151, making the installation of the miniature dual-head drain pump more stable.

[0038] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A miniature double-headed drainage pump comprising: The pump housing (100), a first drainage motor (230) and a second drainage motor (240) mounted on the pump housing (100), and a tubular filter (300) are provided. The pump housing (100) includes a first connecting pipe (110) for water inlet, a second connecting pipe (120) for water outlet, a water outlet chamber (130) connected to the second connecting pipe (120), and a water outlet pipe (140) connected to the water outlet chamber (130). The water inlets of the first drainage motor (230) and the second drainage motor (240) are each connected to the water outlet chamber. (130) 1 port, the tubular filter (300) is inserted into the first connecting pipe (110) along the pipe axis x, characterized in that the pump casing (100) is integrally injection molded, and the pump axis y of the coaxial centrifugal pump of the first drainage motor (230) is perpendicular to the pipe axis x, the pump axis z of the coaxial centrifugal pump of the second drainage motor (240) is perpendicular to the pump axis y, the pump axis z and the pipe axis x are not on the same plane, and the side wall of the first connecting pipe (110) is connected to the second connecting pipe (120).

2. The micropump double head drainage pump according to claim 1, characterized in that, The water outlet cavity (130) is embedded with a cylindrical guide sleeve (400). The guide sleeve (400) has a first guide hole (410) in the center and an annular flange (420) on the outer side wall. The inner side wall of the water outlet cavity (130) is provided with an annular boss (131). The flange (420) abuts against the boss (131).

3. The micropump double head drainage pump according to claim 2, characterized in that, The side wall of the guide sleeve (400) is provided with a second guide hole (430), which is connected to the water outlet pipe (140).

4. The double-headed drainage pump of claim 3, wherein, The outer wall of the guide sleeve (400) forms a positioning rib (440) extending axially, and the inner wall of the boss (131) is provided with a positioning groove (132) corresponding to the positioning rib (440). The positioning rib (440) is embedded in the positioning groove (132) so that the second guide hole (430) is aligned with the water outlet pipe (140).

5. The micropump double head drainage pump according to claim 2, characterized in that, The bottom of the flow guide sleeve (400) is provided with several exhaust holes (450), which are opened around the first flow guide hole (410).

6. The double-headed drainage pump of claim 2, wherein, The first drainage motor (230) and the second drainage motor (240) are each fitted with a sealing ring (220), and the sealing ring (220) abuts against the end face of the guide sleeve (400).

7. The micropump double head drainage pump according to claim 1, characterized in that, The filter (300) has filter holes (310) on its sidewall, and the first connecting pipe (110) is connected to the second connecting pipe (120) through the filter holes (310).

8. A washing machine comprising a first mounting plate (500), a second mounting plate (600) and a micro dual-head drainage pump as claimed in any one of claims 1 to 7, characterized in that, The second connecting pipe (120) is provided with a mounting part (150) integrally formed with the pump casing (100), and the dual-head drainage pump is mounted on the first mounting plate (500) and the second mounting plate (600) through the mounting part (150).

9. A laundry washing machine according to Claim 8, characterized in that The top of the mounting part (150) is provided with a bent part (151) that is connected to the first mounting plate (500), and a reinforcing rib (153) is provided on the bent part (151).

10. A laundry washing machine according to Claim 8, characterized in that The bottom of the mounting part (150) is provided with a track-shaped mounting groove (152), and the second mounting plate (600) is partially embedded in the mounting groove (152).

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