A water pump volute for a cleaning machine

Abstract

The present invention relates to a water pump volute for a cleaning machine, which has a housing cavity for accommodating a centrifugal impeller, the housing cavity has a water inlet at the bottom and a water outlet at the side, and the profile corresponding to the housing cavity is formed by a curve fitting through 4 to 15 points so that the housing cavity forms a flow channel structure that gradually expands along the direction of water flow. The profile corresponding to the housing cavity of the centrifugal volute in the present invention is formed by a curve fitting through 4 to 15 points so that the housing cavity forms a flow channel structure that gradually expands along the direction of water flow, which is conducive to pressurizing the outlet water, improving the head, and meeting the requirements of high-level water flow transportation.

Description

Technical Field

[0001] The invention relates to the technical field of dishwasher accessories, in particular to a water pump volute used in a washing machine. Background Art

[0002] A dishwasher is a device that sprays cold or hot water onto dishes to remove dirt adhering to the dishes and clean the dishes. Common dishwashers on the market include desktop, cabinet, and sink types. Among them, only sink-type dishwashers use open water pumps, that is, the water pump is combined with the spray arm. The spray arm is part of the volute of the water pump, and it has the functions of both drawing water and spraying water columns, so that it is easy to disassemble and clean, and maintain a good water flow effect.

[0003] The applicant's prior application ZL201310752030.3 "Open Sink Cleaning Machine" discloses the above-mentioned water pump structure. The rotating spray arm serves as the water outlet component of the water pump, and an upper accommodating cavity is formed at the middle bottom thereof to accommodate the upper part of the blade. The rotating spray arm has a flow channel connected to the upper accommodating cavity, the upper accommodating cavity is located in the middle of the rotating spray arm, and the flow channel is located on both sides of the upper accommodating cavity.

[0004] In actual use, the above-mentioned water pump can only supply water to a single layer, but cannot supply water to a water outlet component or multiple water outlet components. The Chinese invention patent application "Energy-saving Dishwasher" (application number: CN201611232345.5) with application publication number CN106859563A discloses a structure, which includes a cavity for accommodating tableware and providing a cleaning space, a spray system for spraying water to clean the tableware, and a pump body for pumping water and supplying water to the spray system; the spray system is arranged in the cavity; the pumping end of the pump body is connected to the cavity, and the water supply end is connected to the spray system; the spray system includes an inner water pipe and two or more spray devices, and the two or more spray devices are respectively arranged on the inner water pipe; the water supply end of the pump body is connected to a water distribution device, and the water distribution device is provided with two or more water outlets corresponding to the two or more spray devices, and the spray device is connected to the corresponding water outlets; when working, the water distribution device conducts one or more water outlets according to instructions, so that one or more spray devices can perform cleaning work. In the above-mentioned existing dishwashers capable of bottom spraying and top spraying, the pump used to supply water to the spraying system generally adopts a closed structure, that is, the volute of the washing pump is arranged below the housing, a rotatable impeller is arranged inside the volute, the water inlet of the washing pump volute is connected to the bottom of the washing chamber, and the water outlet of the volute is connected to a water dividing device, which divides the water flow into a first branch supplying water to the bottom spray arm and a second branch supplying water to the top spray arm. Since the water pressure of the top spray water and the bottom spray water are both supplied by the washing pump, the head, flow rate and impact force of the water flow on each branch after the diversion are greatly reduced, affecting the cleaning effect. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a water pump volute for a cleaning machine that increases the water outlet pressure and the head of the jet water flow by optimizing the volute profile in view of the current status of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide a water pump volute for a cleaning machine that can provide power for two washing water routes respectively, thereby increasing the head and water flow rate and thus improving the cleaning effect, in view of the current status of the prior art.

[0007] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is: a water pump volute for a cleaning machine, having a accommodating chamber for accommodating a centrifugal impeller, the accommodating chamber having a water inlet at the bottom and a water outlet on the side, and the profile corresponding to the accommodating chamber is formed by fitting a curve passing through 4 to 15 points so that the accommodating chamber forms a flow channel structure that gradually expands along the direction of water flow.

[0008] In the above scheme, the center of the accommodating cavity is taken as the origin O, the horizontal line passing through the origin O is taken as the X axis, and the vertical line passing through the origin O is taken as the Y axis. In the counterclockwise direction, the starting point A of the profile corresponding to the accommodating cavity is located in the second quadrant, and the ending point H is located on the negative half axis of the X axis and on the left side of point A. The starting point A of the profile is connected to a first straight line segment AM extending in the positive direction of the Y axis, and the ending point H of the profile is connected to a second straight line segment HN extending in the positive direction of the Y axis. The second straight line segment HN and the first straight line segment AM form the water outlet channel profile of the volute. This structure is conducive to maintaining the stability of the water flow at the water outlet.

[0009] Preferably, the profile corresponding to the accommodating cavity is fitted by a curve passing through 8 points, the first point A is located in the second quadrant, the second point B is located on the positive semi-axis of the Y axis, the third point C is located in the first quadrant, the fourth point D is located on the positive semi-axis of the X axis, the fifth point E is located in the fourth quadrant, the sixth point F is located on the negative semi-axis of the Y axis, the seventh point G is located in the third quadrant, and the eighth point H is located on the negative semi-axis of the X axis. The centrifugal volute profile is obtained by smoothly connecting the above eight points with a curve, forming a flow channel structure that gradually expands along the direction of water flow. The speed of the water flow will gradually slow down during the flow process. According to the Bernoulli principle, under the condition that the flow rate remains constant, the water pressure will increase as the water flow speed decreases. In the present invention, the water flow can be pressurized to the maximum extent inside the smooth volute to increase the head of the output water flow.

[0010] In the present invention, the line between the third point C and the origin O forms an angle α of 40° to 50° with the positive half axis of the Y axis. The line between the fifth point E and the origin O forms an angle β of 23.691° to 33.691° with the positive half axis of the X axis. The line between the seventh point G and the origin O forms an angle γ of 40° to 50° with the negative half axis of the Y axis. The above structure is conducive to improving the water flow pressurization effect, reducing energy loss, and maintaining smooth water flow.

[0011] Preferably, the coordinates of the first point A are (Xa, Ya), and the coordinates of the eighth point H are (Xh, 0), wherein Xa=-11.5~-7.6, more preferably -9.699; Ya=29.5~35.5, more preferably 32.5; Xh=52.2~58.5, more preferably 55.5.

[0012] Preferably, the coordinates of the second point B are (0, Yb), the coordinates of the third point C are (Xc, Yc), and the coordinates of the fourth point D are (Xd, 0), wherein Yb=36.4-43.5, more preferably 38.4; Xc 2 +Yc 2 =(38.6 2 ~43.2 2 ), and more preferably 41.8 2 ; Xd = 40.1~47.5, more preferably 44.2.

[0013] Preferably, the coordinates of the fifth point E are (Xe, Ye), the coordinates of the sixth point F are (0, Yf), and the coordinates of the seventh point G are (Xg, Yg), wherein Xe 2 +Ye 2 =(42.7 2 ~47.2 2 ), and more preferably 45.6 2 ; Yf = 43 to 51, more preferably 47; Xg 2 +Yg 2 =(46.2 2 ~53.1 2 ), and more preferably 49.6 2 .

[0014] The profile formed by fitting the above parameters is conducive to improving the smoothness of water flow, reducing energy loss, and pressurizing the outlet water to the maximum extent to increase the water jet head, thereby improving the cleaning effect.

[0015] In the present invention, the volute includes an upper shell and a lower shell, the upper shell has a first accommodating chamber for installing the upper part of the first power component, the top wall and / or side wall of the upper shell are provided with spray holes in fluid communication with the first accommodating chamber, the lower shell is connected to the lower part of the upper shell, the upper part of the lower shell has a second accommodating chamber for installing the lower part of the first power component, the side of the lower shell is provided with a first water inlet for supplying water into the second accommodating chamber, the accommodating chamber is located at the lower part of the lower shell and is used to install the second power component, the water inlet is provided at the central part of the bottom wall of the lower shell, and the water outlet is provided at the side of the lower shell. The above-mentioned volute structure is an open volute structure, wherein the second accommodating chamber and the first accommodating chamber located at the upper part are for bottom spray water supply, and the accommodating chamber located at the lower part is for top and / or middle spray water supply. Since the power of the two water flows is independently supplied by the corresponding pumps, the head and water flow of each water flow are improved, which is conducive to improving the cleaning effect.

[0016] In the above schemes, a partition for separating the second accommodating chamber and the accommodating chamber into relatively independent chambers is provided in the middle of the lower shell, and the accommodating chamber forms a flat centrifugal chamber.

[0017] Compared with the prior art, the advantages of the present invention are that the profile corresponding to the accommodating chamber of the centrifugal volute in the present invention is formed by curve fitting through 4 to 15 points, so that the accommodating chamber forms a flow channel structure that gradually expands along the direction of water flow, which is beneficial to pressurize the outlet water, increase the head, and meet the requirements of high-level water transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial structural schematic diagram of a volute according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure from another angle;

[0020] Figure 3 for Figure 1 A cross-sectional view of

[0021] Figure 4 It is a structural schematic diagram of the volute profile of an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the dual pump system in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] The volute structure of this embodiment is suitable for a dual-pump system, that is, a pump system that can provide bidirectional power. The dual-pump system can be used in larger dishwashers to supply water for bottom spraying, top spraying and / or middle spraying, but is certainly not limited to this use environment.

[0025] like Figures 1 to 5 As shown, the volute structure of this embodiment includes an upper shell 3 and a lower shell 4. The upper shell 3 has a body extending in the length direction. The central part of the body has a first accommodating chamber 31 for installing the upper part of the first power component 1. Both sides of the body have flow channels connected to the first accommodating chamber 31. The top wall of the upper shell 3 is provided with a spray hole connected to the flow channel. The lower shell 4 is connected to the lower part of the upper shell 3. The upper part of the lower shell 4 has a second accommodating chamber 41 for installing the lower part of the first power component 1. The second accommodating chamber 41 is correspondingly connected to the first accommodating chamber 31. The side of the lower shell 4 is provided with a first water inlet 411 for supplying water into the second accommodating chamber 41; the lower part of the lower shell 4 has an accommodating chamber 42 for installing the second power component 2. The bottom of the lower shell 4 is provided with a second water inlet 421 for supplying water into the accommodating chamber 42. The side of the lower shell 4 is provided with a water outlet 422 for supplying water from the accommodating chamber 42.

[0026] Specifically, Figure 3 , 5 As shown, a partition 43 for separating the second accommodating chamber 41 and the accommodating chamber 42 into relatively independent chambers is provided in the middle of the lower shell 4. The second accommodating chamber 41 and the accommodating chamber 42 are relatively independent, so as to facilitate independent water supply for the lower spray, the top and / or the middle spray, reduce the fluid disturbance between each other, reduce the capacity loss, and improve the water head, water flow and spraying force.

[0027] The above-mentioned accommodating chamber 42 is located below the partition 43 and is roughly disc-shaped. The second water inlet 421 is opened in the center of the bottom wall of the lower shell 4, and the water outlet 422 is tangentially connected to the accommodating chamber 42 through a guide pipe 423. This structure is beneficial to reducing the capacity loss of the accommodating chamber 42 to output water flow.

[0028] The second accommodating chamber 41 is located above the partition 43 and extends vertically. The inner diameter of the second accommodating chamber 41 is smaller than that of the accommodating chamber 42 and is adapted to the lower part of the first power component 1. This structure is conducive to reducing the energy loss of water flow when flowing through the second accommodating chamber 41.

[0029] In this embodiment, the first power component 1 has a centrifugal impeller at the top and an axial flow impeller at the bottom, and the second power component 2 is a centrifugal impeller. A driving member 5 is provided below the volute, and an output shaft 51 of the driving member 5 passes through the second water inlet 421, the accommodating chamber 42, and the second accommodating chamber 41 upwards and extends into the first accommodating chamber 31 in sequence, and the output shaft 51 is connected to the first power component 1 and the second power component 2 to drive the two to rotate.

[0030] In this embodiment, the profile corresponding to the accommodating cavity 42 is formed by fitting a curve passing through 4 to 15 points so that the accommodating cavity 42 forms a flow channel structure that gradually expands along the flow direction of water.

[0031] Specifically, Figure 4 As shown, with the center of the accommodating cavity 42 as the origin O, the horizontal line passing through the origin O as the X axis, and the vertical line passing through the origin O as the Y axis, in the counterclockwise direction, the starting point A of the profile corresponding to the accommodating cavity 42 is located in the second quadrant, the ending point H is located on the negative half axis of the X axis and on the left side of point A, the starting point A of the profile is connected to a first straight line segment AM extending in the positive direction of the Y axis, and the ending point H of the profile is connected to a second straight line segment HN extending in the positive direction of the Y axis, and the second straight line segment HN and the first straight line segment AM form the water outlet channel profile of the volute, which corresponds to the guide pipe 423. This structure is conducive to maintaining the stability of the water flow at the water outlet.

[0032] The profile corresponding to the accommodating chamber 42 is fitted by a curve passing through 8 points, the first point A is located in the second quadrant, the second point B is located on the positive semi-axis of the Y axis, the third point C is located in the first quadrant, the fourth point D is located on the positive semi-axis of the X axis, the fifth point E is located in the fourth quadrant, the sixth point F is located on the negative semi-axis of the Y axis, the seventh point G is located in the third quadrant, and the eighth point H is located on the negative semi-axis of the X axis. The centrifugal volute profile is obtained by smoothly connecting the above eight points with a curve, forming a flow channel structure that gradually expands along the direction of water flow. The speed of the water flow will gradually slow down during the flow process. According to the Bernoulli principle, under the condition of maintaining a certain flow rate, the water pressure will increase when the water flow speed decreases. In the present invention, the water flow can be pressurized to the maximum extent inside the smooth volute to increase the head of the output water flow.

[0033] The line between the third point C and the origin O forms an angle α of 40° to 50° with the positive half axis of the Y axis, preferably 45°. The line between the fifth point E and the origin O forms an angle β of 23.691° to 33.691° with the positive half axis of the X axis, preferably 28.691°. The line between the seventh point G and the origin O forms an angle γ of 40° to 50° with the negative half axis of the Y axis, preferably 45°. The above structure is conducive to improving the water flow pressurization effect, reducing energy loss, and maintaining smooth water flow.

[0034] The coordinates of the first point A are (Xa, Ya), the coordinates of the eighth point H are (Xh, 0), where Xa = -11.5 to -7.6, preferably -9.699; 29.5 to 35.5, preferably 32.5; Xh = 52.2 to 58.5, preferably 55.5. The coordinates of the second point B are (0, Yb), the coordinates of the third point C are (Xc, Yc), and the coordinates of the fourth point D are (Xd, 0), where Yb = 36.4 to 43.5, preferably 38.4; Xc 2 +Yc 2 =(38.6 2 ~43.2 2 ), preferably 41.8 2 ; Xd = 40.1 to 47.5, preferably 44.2. The coordinates of the fifth point E are (Xe, Ye), the coordinates of the sixth point F are (0, Yf), and the coordinates of the seventh point G are (Xg, Yg), where Xe 2 +Ye 2 =(42.7 2 ~47.2 2 ), preferably 45.6 2 ; Yf = 43 to 51, preferably 47; Xg 2 +Yg 2 =(46.2 2 ~53.1 2 ), preferably 49.6 2 .

[0035] The profile formed by fitting the above parameters is conducive to improving the smoothness of water flow, reducing energy loss, and pressurizing the outlet water to the maximum extent to increase the water jet head, thereby improving the cleaning effect.

[0036] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A water pump volute for a cleaning machine, comprising a housing chamber (42) for accommodating a centrifugal impeller, wherein the housing chamber (42) has a water inlet (421) at the bottom and a water outlet (422) at the side, and is characterized in that: The profile corresponding to the accommodating cavity (42) is formed by fitting a curve passing through 4 to 15 points so that the accommodating cavity (42) forms a flow channel structure that gradually expands along the flow direction of water; Taking the center of the accommodating cavity (42) as the origin O, the horizontal line passing through the origin O as the X-axis, and the vertical line passing through the origin O as the Y-axis, along the counterclockwise direction, the starting point A of the profile corresponding to the accommodating cavity (42) is located in the second quadrant, and the ending point H is located on the negative half axis of the X-axis and on the left side of point A, the starting point A of the profile is connected to a first straight line segment AM extending in the positive direction of the Y-axis, and the ending point H of the profile is connected to a second straight line segment HN extending in the positive direction of the Y-axis, and the second straight line segment HN and the first straight line segment AM form the water outlet channel profile of the volute; The volute comprises an upper shell (3) and a lower shell (4); the upper shell (3) has a first accommodating chamber (31) for mounting the upper part of the first power component (2); a spray hole (32) in fluid communication with the first accommodating chamber (31) is provided on the top wall and / or the side wall of the upper shell (3); the lower shell (4) is connected to the bottom of the upper shell (3); the upper part of the lower shell (4) has a second accommodating chamber (41) for mounting the lower part of the first power component (1); A first water inlet (411) is provided on the side for supplying water into the second accommodating chamber (41); the accommodating chamber (42) is located at the lower part of the lower shell (4) and is used to install the second power component (2); the water inlet (421) is provided at the central part of the bottom wall of the lower shell (4); the water outlet (422) is provided at the side of the lower shell (4); a partition plate is provided in the middle part of the lower shell for separating the second accommodating chamber from the accommodating chamber into relatively independent cavities; the accommodating chamber forms a flat centrifugal chamber; The volute is an open volute structure, wherein the second accommodating chamber and the first accommodating chamber located at the upper part are supplied with water by bottom spraying, and the accommodating chamber located at the lower part is supplied with water by top and / or middle spraying, and the power of the two water flows is independently supplied by corresponding pumps.

2. The water pump volute for a cleaning machine according to claim 1, characterized in that: The profile corresponding to the accommodating cavity (42) is fitted by a curve passing through 8 points, wherein the first point A is located in the second quadrant, the second point B is located on the positive half axis of the Y axis, the third point C is located in the first quadrant, the fourth point D is located on the positive half axis of the X axis, the fifth point E is located in the fourth quadrant, the sixth point F is located on the negative half axis of the Y axis, the seventh point G is located in the third quadrant, and the eighth point H is located on the negative half axis of the X axis.

3. The water pump volute for a cleaning machine according to claim 2, characterized in that: The angle between the line between the third point C and the origin O and the positive half axis of the Y axis is 40° to 50°.

4. The water pump volute for a cleaning machine according to claim 2, characterized in that: The angle between the line between the fifth point E and the origin O and the positive half axis of the X-axis is 23.691° to 33.691°.

5. The water pump volute for a cleaning machine according to claim 2, characterized in that: The angle between the line connecting the seventh point G and the origin O and the negative half axis of the Y axis is 40° to 50°.

6. The water pump volute for a cleaning machine according to claim 2, characterized in that: The coordinates of the first point A are (Xa, Ya), and the coordinates of the eighth point H are (Xh, 0), wherein Xa=-11.5~-7.6, Ya=29.5~35.5, and Xh=52.2~58.

5.

7. The water pump volute for a cleaning machine according to claim 6, characterized in that: The coordinates of the second point B are (0, Yb), the coordinates of the third point C are (Xc, Yc), and the coordinates of the fourth point D are (Xd, 0), where Yb = 36.4-43.5, Xc 2 +Yc 2 =(38.6 2 ~43.2 2 ), Xd=40.1~47.

5.

8. The water pump volute for a cleaning machine according to claim 7, characterized in that: The coordinates of the fifth point E are (Xe, Ye), the coordinates of the sixth point F are (0, Yf), and the coordinates of the seventh point G are (Xg, Yg), where Xe 2 +Ye 2 =(42.7 2 ~47.2 2 ), Yf=43~51, Xg 2 +Yg 2 =(46.2 2 ~53.1 2 ).

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