Pump

Abstract

The present invention provides a pump, comprising a cover shell with a receiving cavity, a driving device installed at one end of the cover shell and a heating device extending into the receiving cavity, the driving device is provided with a driving shaft extending into the receiving cavity, the pump also comprises a flow bushing received in the cover shell, the driving shaft extends into the flow bushing, the flow bushing is provided with a flow channel and an outlet connected to the flow channel, the flow channel extends in a spiral shape to be connected to the outlet, thereby not increasing the overall size of the pump and making the installation structure more compact.

Description

Technical Field

[0001] The invention relates to a pump. Background Art

[0002] Generally speaking, a pump has a single function of washing or draining. However, in the related art, pumps are also developing from single functions to multi-functions, that is, combining multiple functions in the same pump. In particular, as an important component of a dishwasher, the pump determines the spatial size and layout of the dishwasher, thus placing higher requirements on the structural design of the pump. Summary of the invention

[0003] The object of the present invention is to provide a pump with a compact installation structure.

[0004] To achieve the above-mentioned purpose, the present invention provides a pump, comprising a cover shell having a receiving cavity, a driving device installed at one end of the cover shell and a heating device extending into the receiving cavity, the driving device is provided with a driving shaft extending into the receiving cavity, the pump also comprises a flow bushing received in the cover shell, the driving shaft extends into the flow bushing, and the flow bushing is provided with a flow channel and an outlet connected to the flow channel.

[0005] Optionally, the flow channel extends in a spiral shape to be connected to the outlet, and the flow channel is provided with a first wall. In the spiral direction of the flow channel, the width and height of the first wall gradually increase compared to the starting position of the flow channel. The outlet is provided with a second wall, which is located at an end of the flow channel away from the starting position and is arranged approximately perpendicular to the first wall.

[0006] Optionally, the cover shell is provided with a third wall matched with the first wall and a fourth wall matched with the second wall, the third wall extends in a spiral shape, and the fourth wall is arranged substantially perpendicular to the third wall.

[0007] Optionally, the flow bushing includes a liquid inlet portion and a liquid outlet portion, the liquid inlet portion is coaxially arranged with the liquid outlet portion, the outlet is arranged at the liquid outlet portion and at least two are arranged therein, the flow channel is arranged at the liquid outlet portion and at least two are arranged therein correspondingly, and each flow channel extends in a spiral shape to be connected with the corresponding outlet.

[0008] Optionally, the outlet and the flow channel are arranged on a side of the liquid outlet portion close to the liquid inlet portion, three outlets and three flow channels are provided, and three flow channels and corresponding three outlets are evenly distributed on the liquid outlet portion.

[0009] Optionally, the pump further comprises a sealing ring disposed between the liquid inlet portion and the cover shell to seal a gap between the cover shell and the flow bushing.

[0010] Optionally, the heating device includes a spirally extending heating tube, a first fixed tube portion located at one end of the heating tube, and a second fixed tube portion located at the other end of the heating tube. The heating tube surrounds the outer side of the liquid inlet portion, and the extension directions of the first fixed tube portion and the second fixed tube portion are parallel to each other.

[0011] Optionally, the cover shell includes a mounting portion for fixing the heating device, the mounting portion includes a mounting wall formed on the cover shell and a mounting shell assembled with the mounting wall, and in the assembly direction of the mounting shell, the first fixed tube portion and the second fixed tube portion extend obliquely into the accommodating cavity.

[0012] Optionally, the mounting wall is provided with a protrusion, and the mounting shell is correspondingly provided with a through hole for limiting and accommodating the protrusion.

[0013] Optionally, the mounting portion further includes a sealing gasket provided between the mounting wall and the mounting shell.

[0014] It can be seen from the above technical solution that the pump of the present invention provides a flow bushing in the housing, and provides a spirally extending flow channel and an outlet connected to the flow channel on the flow bushing, thereby not increasing the overall size of the pump and making the installation structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the pump of the present invention.

[0016] Figure 2 yes Figure 1 Schematic diagram of the cross section along the AA direction.

[0017] Figure 3 yes Figure 1 The pump is shown as a partially exploded view with the drive unit and rear housing removed.

[0018] Figure 4 yes Figure 3 Schematic diagram of the structure of the medium flow bushing.

[0019] Figure 5 yes Figure 4 Another angle structural schematic diagram of the current bushing shown.

[0020] Reference numerals:

[0021] 100-pump; 1-housing; 10-accommodating chamber; 11-main body; 12-mounting part; 121-mounting wall; 1211-protrusion; 122-mounting shell; 1221-through hole; 13-liquid inlet pipe; 14-liquid outlet pipe; 141-outlet end; 15-third wall; 16-fourth wall; 2-driving device; 21-driving shaft; 22-motor rotor; 23-motor stator assembly; 24-liquid separation plate; 241-first sealing ring; 25 1- bracket; 252- bearing; 3- impeller; 31- central axis; 32- impeller blades; 33- liquid inlet; 4- heating device; 41- heating tube; 42- first fixed tube portion; 43- second fixed tube portion; 44- connecting portion; 5- flow bushing; 501- liquid inlet portion; 502- liquid outlet portion; 503- liquid inlet cavity; 504- second sealing ring; 51- flow channel; 511- first wall; 52- outlet; 521- second wall; 6- rear shell. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] See also Figures 1 to 3 As shown, the present invention discloses a pump 100. The pump 100 comprises a casing 1, a driving device 2 installed at one end of the casing 1, an impeller 3 connected to the driving device 2 and accommodated in the casing 1, a heating device 4 extending into the casing 1, a flow bushing 5 installed in the casing 1, and a rear casing 6 covering the driving device 2.

[0024] The housing 1 includes a main body 11 in a columnar shape, a receiving cavity 10 formed in the main body 11 , and a mounting portion 12 extending outward from one side of the main body 11 for fixing the heating device 4 .

[0025] The mounting portion 12 includes a mounting wall 121 formed on the main body 11, a mounting groove (not numbered) located in the mounting wall 121, and a mounting shell 122 for closing the mounting groove. The mounting groove and the mounting shell 122 are both substantially rectangular, and one end of the mounting groove is connected to the receiving cavity 10 and the other end is matched with the mounting shell 122; the mounting shell 122 is fixedly connected to the heating device 4.

[0026] The mounting shell 122 is fixedly mounted on the mounting wall 121. In the present embodiment, the mounting wall 121 and the mounting shell 122 are fixed by snapping. Specifically, the mounting wall 121 is provided with a plurality of protrusions 1211 protruding outward away from the mounting groove, and the mounting shell 122 is correspondingly provided with through holes 1221 for limiting and accommodating the protrusions 1211. The mounting shell 122 is fixed to the mounting wall 121 by the matching clamping of the protrusions 1211 and the through holes 1221 to close the mounting groove. Furthermore, a sealing gasket (not shown) is also provided between the mounting wall 121 and the mounting shell 122. Such a configuration can ensure the sealing of the pump 100.

[0027] The housing 1 is further provided with a liquid inlet pipe 13 arranged along the extension direction of the main body 11 and a liquid outlet pipe 14 arranged corresponding to the mounting groove. The pipe wall of the liquid inlet pipe 13 is connected to the main body 11, and one end of the liquid inlet pipe 13 extends into the receiving cavity 10; the pipe wall of the liquid outlet pipe 14 is connected to the main body 11; and the liquid inlet pipe 13 and the liquid outlet pipe 14 are both in communication with the receiving cavity 10.

[0028] In this embodiment, the liquid outlet pipe 14 is provided with an outlet end 141 extending beyond the cover shell 1, and the outlet end 141 is arranged opposite to the mounting portion 12, that is, if the outlet end 141 is located on the rear side or upper side of the cover shell 1, the mounting portion 12 is correspondingly located on the front side or lower side of the cover shell 1.

[0029] The driving device 2 includes a driving shaft 21 extending into the accommodating cavity 10, a motor rotor 22 surrounding the outer circumference of the driving shaft 21, a motor stator assembly 23 surrounding the outer circumference of the motor rotor 22, a liquid separation plate 24 separating the motor rotor 22 from the motor stator assembly 23, and a supporting assembly (unnumbered) for supporting and fixing the driving shaft 21.

[0030] In this embodiment, the driving shaft 21 and the liquid inlet pipe 13 have the same extension direction, and the mounting portion 12 and the liquid outlet pipe 14 are arranged relatively along the assembly direction of the mounting shell 122. The liquid separation plate 24 cooperates with the main body 11 to separate the motor rotor 22 and the motor stator assembly 23, thereby achieving water and electricity separation between the motor rotor 22 and the motor stator assembly 23. Further, in this embodiment, a first sealing ring 241 is provided between the liquid separation plate 24 and the main body 11 of the cover 1, that is, the first sealing ring 241 is clamped between the main body 11 and the liquid separation plate 24 along the axial direction of the driving shaft 21 to enhance the sealing effect between the main body 11 and the liquid separation plate 24.

[0031] The support assembly includes a bracket 251 and two bearings 252 for fixing the drive shaft 21. The drive shaft 21 passes through the bracket 251 and is fixed to the liquid separation plate 24 and the bracket 251 through the bearings 252. The bracket 251 is connected and positioned on the liquid separation plate 24 and is arranged perpendicular to the axial direction of the drive shaft 21 to separate the receiving chamber 10 from the motor rotor 22. Specifically, the motor rotor 22 is received in a space formed by the liquid separation plate 24 and the bracket 251. The liquid in the receiving chamber 10 can enter the liquid separation plate 24 along the gap at the connection position between the bracket 251 and the liquid separation plate 24, and contact the motor rotor 22 to take away the heat generated during the operation of the motor rotor 22, so as to prevent the abnormal use of the pump 100 caused by the excessively high working temperature of the motor rotor 22, thereby achieving the purpose of extending the service life of the pump 100 of the present invention.

[0032] See also Figures 3 to 5 As shown, the flow bushing 5 is received in the receiving chamber 10 and is located between the liquid inlet pipe 13 and the bracket 251, and is used to collect liquid. The drive shaft 21 extends into the flow bushing 5. The flow bushing 5 includes a liquid inlet portion 501 and a liquid outlet portion 502. The liquid inlet portion 501 is coaxially arranged with the liquid outlet portion 502, and the diameter of the liquid inlet portion 501 is smaller than the diameter of the liquid outlet portion 502. A liquid inlet cavity 503 is provided in the liquid inlet portion 501. The liquid inlet portion 501 is received in the receiving chamber 10 and corresponds to the liquid inlet pipe 13, so that the liquid inlet pipe 13 is connected with the liquid inlet cavity 503, so that the liquid enters the liquid inlet cavity 503 first after entering from the liquid inlet pipe 13.

[0033] A second sealing ring 504 is provided between the liquid inlet portion 501 and the cover shell 1, and the second sealing ring 504 is provided at the matching position between the front end of the liquid inlet portion 501 and the liquid inlet pipe 13, so as to seal the gap between the cover shell 1 and the flow bushing 5 and improve the sealing performance when water is entering.

[0034] The flow bushing 5 is essentially an energy conversion device, and its purpose is to convert kinetic energy into pressure energy in the receiving chamber 10. Therefore, the flow bushing 5 of the present invention is provided with a flow channel 51 and an outlet 52 connected to the flow channel 51. The flow channel 51 extends in a spiral shape to be connected to the outlet 52, thereby further achieving the purpose of increasing the pressure energy in the receiving chamber 10.

[0035] Specifically, the flow channel 51 is provided with a first wall 511, and taking the starting position of the flow channel 51 as a reference plane, in the spiral direction of the flow channel 51, the width and height of the first wall 511 gradually increase compared with the reference plane; the outlet 52 is provided with a second wall 521, and the second wall 521 is located at an end of the flow channel 51 away from the starting position and is arranged approximately perpendicular to the first wall 511; thereby, after the liquid flows into the liquid inlet cavity 503 from the liquid inlet pipe 13, it will pass through the flow channel 51 and then flow out from the outlet 52.

[0036] The housing 1 is provided with a third wall 15 matched with the first wall 511 and a fourth wall 16 matched with the second wall 521, the third wall 15 extends in a spiral shape, and the fourth wall 16 is arranged substantially perpendicular to the third wall 15. Since the flow bushing 5 is accommodated in the accommodation cavity 10, the third wall 15 and the fourth wall 16 are substantially formed on the inner side wall of the housing 1, so that the flow bushing 5 can be limited in the accommodation cavity 10 through the cooperation between the first wall 511 and the third wall 15 and the mutual cooperation between the second wall 521 and the fourth wall 16.

[0037] The coaxial direction of the liquid inlet portion 501 and the liquid outlet portion 502 is defined as the axial direction of the flow bushing 5, so that on the one hand, the axial direction of the flow bushing 5 is the same as the axial direction of the drive shaft 21 and the liquid inlet direction of the liquid inlet pipe 13, and on the other hand, the spiral of the flow channel 51, the spiral of the first wall 511 and the spiral of the third wall 15 are all formed by spiraling around the axial direction of the flow bushing 5. Since the first wall 511 and the third wall 15 both extend in a spiral shape, the first wall 511 cooperates with the third wall 15 to position the flow bushing 5 in the axial direction of the flow bushing 5 in the cover shell 1; since the extension direction of the second wall 521 and the fourth wall 16 is the same as the axial direction of the flow bushing 5, the second wall 521 cooperates with the fourth wall 16 to position the flow bushing 5 in the radial direction of the flow bushing 5 (perpendicular to the axial direction of the flow bushing 5) in the cover shell 1, thereby not only effectively utilizing the space in the cover shell 1, but also achieving the purpose of miniaturizing the volume of the cover shell 1.

[0038] In this embodiment, the flow channel 51 and the outlet 52 are both arranged at the liquid outlet 502, and at least two outlets 52 and the flow channel 51 are arranged correspondingly, and each flow channel 51 extends in a spiral shape to communicate with the corresponding outlet 52. Such an arrangement not only meets the structural requirements for miniaturization of the pump 100, but also meets the requirements for high efficiency. The outlet 52 and the flow channel 51 are arranged on the side of the liquid outlet 502 close to the liquid inlet 501; preferably, three outlets 52 and three flow channels 51 are arranged, and three flow channels 51 and corresponding three outlets 52 are evenly distributed on the liquid outlet 502, and two adjacent third walls 15 are connected by the fourth wall 16, so as to achieve the purpose of miniaturization of the volume of the housing 1. Specifically, the starting position of each of the three flow channels 51 corresponds to the position of the outlet 52 of the adjacent flow channel 51, and the plane where the outlet 52 is located is higher than the plane where the starting position of the flow channel 51 is located. This arrangement allows the three flow channels 51 to extend in a spiral shape, thereby facilitating the liquid to form a vortex along the flow channel 51 in the flow bushing 5 and then flow out from the outlet 52, thereby reducing pressure loss.

[0039] The outlet 52 of the flow bushing 5 is disposed close to the liquid outlet pipe 14 , so that the liquid in the receiving chamber 10 can flow out from the outlet 52 and then quickly flow out along the liquid outlet pipe 14 .

[0040] During assembly, one end of the liquid inlet portion 501 of the flow bushing 5 is positioned and matched with the liquid inlet pipe 13, the first wall 511 of the flow channel 51 of the liquid outlet portion 502 and the third wall 15 of the cover shell 1 are positioned and matched with each other in the axial direction of the flow bushing 5, the second wall 521 of the outlet 52 of the liquid outlet portion 502 and the fourth wall 16 of the cover shell 1 are positioned and matched with each other in the radial direction of the flow bushing 5, and the end of the liquid outlet portion 502 (i.e., the end away from the liquid inlet portion 501) is positioned with the bracket 251, thereby ensuring that the flow bushing 5 is limited and fixed in the accommodating cavity 10 and cannot move between the liquid inlet pipe 13 and the bracket 251.

[0041] Please continue to Figure 2As shown, the impeller 3 is accommodated in the liquid outlet 502. The impeller 3 is provided with a central axis 31 fixed on the driving shaft 21, a plurality of impeller blades 32 arranged around the central axis 31, and a liquid inlet 33 located at one end of the central axis 31 and away from the driving device 2. The central axis 31 drives the impeller 3 to rotate under the action of the driving shaft 21; a liquid outlet (not numbered) is formed between the adjacent impeller blades 32; the liquid inlet 33 is arranged corresponding to the liquid inlet portion 501 of the flow bushing 5, so that the liquid inlet pipe 13, the liquid inlet cavity 503 and the liquid inlet 33 are connected to each other, so that after the liquid enters from the liquid inlet pipe 13, it first passes through the liquid inlet cavity 503, then enters the impeller 3 through the liquid inlet 33, and then flows out from the liquid outlet.

[0042] See also Figures 1 to 3 As shown, the heating device 4 includes a heating tube 41 accommodated in the receiving chamber 10, a first fixed tube portion 42 located at one end of the heating tube 41, a second fixed tube portion 43 located at the other end of the heating tube 41, and a connecting portion 44 for fixing the first fixed tube portion 42 and the second fixed tube portion 43. The heating tube 41 extends in a spiral shape and surrounds the outer circumference of the liquid inlet portion 501, so that the heating tube 41 can perform heat exchange with the liquid in the liquid inlet chamber 503 on the one hand, and can directly contact with the liquid in the receiving chamber 10 for heat exchange on the other hand, which effectively improves the heating efficiency of the liquid in the receiving chamber 10 and ensures the heating uniformity of the liquid when the heating tube 41 heats the liquid.

[0043] The heating device 4 is fixedly assembled to the mounting portion 12, the extending directions of the first fixed pipe portion 42 and the second fixed pipe portion 43 are parallel to each other, the first fixed pipe portion 42 and the second fixed pipe portion 43 are received in the mounting groove, and obliquely protrude into the receiving cavity 10 along the assembly direction of the mounting shell 122 to communicate with the heating pipe 41. Such an arrangement can not only ensure that the heating pipe 41 has a good heating power, but also meet the requirements of miniaturization of the cover shell 1.

[0044] like Figure 1As shown, in the present invention, in the axial direction of the drive shaft 21, the first fixed pipe portion 42 and the second fixed pipe portion 43 are arranged left and right, and a direction perpendicular to both the assembly direction of the mounting shell 122 and the axial direction of the drive shaft 21 is defined as a first direction. In the first direction, the first fixed pipe portion 42 and the second fixed pipe portion 43 are arranged up and down; further, in the assembly direction of the mounting shell 122, there is a gap between the extension direction of the first fixed pipe portion 42 and the second fixed pipe portion 43 and the horizontal direction (i.e., the assembly direction of the mounting shell 122). In the angle difference; the angle difference is 8 to 20 degrees, preferably, the angle difference is 10 to 12 degrees. Such an arrangement can effectively avoid the increase in the volume of the cover shell 1 caused by the assembly of the heating device 4, thereby achieving the purpose of reducing the volume of the pump 100; and in an embodiment of the present invention, in the axial direction of the drive shaft 21, the connecting line of the first fixed tube portion 42 and the second fixed tube portion 43 is located on the diagonal line of the mounting groove (or the mounting shell 122). Such an arrangement can further reduce the volume of the pump 100, and the mounting structure is more compact.

[0045] The heating tube 41 is connected and fixed to the connecting portion 44 through the first fixing tube portion 42, the second fixing tube portion 43, and is further fixed to the mounting portion 12. During the assembly of the heating device 4 and the mounting portion 12, the heating device 4 can be fixed to the mounting portion 12 and the heating tube 41 can be extended into the receiving cavity 10 through the cooperation between the through hole 1221 on the mounting shell 122 and the protrusion 1211 on the mounting wall 121, so as to complete the heating of the liquid.

[0046] The rear shell 6 covers the rear side of the driving device 2 to protect the driving device 2 to prevent the driving device 2 from being damaged.

[0047] When the pump 100 of the present invention is used, first, the liquid enters the liquid inlet cavity 503 through the liquid inlet pipe 13, and enters the impeller blades 32 through the liquid inlet port 33 under the rotation of the impeller 3; then, it flows out along the liquid outlet between the impeller blades 32 and enters the inner cavity of the liquid outlet portion 502; then, a part of the liquid entering the inner cavity of the liquid outlet portion 502 enters the liquid separation plate 24, contacts the motor rotor 22, and takes away the heat generated by the motor rotor 22 when it is working. , and then, driven by the impeller 3, it enters the inner cavity of the liquid outlet portion 502 again, and flows into the receiving chamber 10 from the outlet 52 through the flow channel 51, contacts the heating tube 41, and completes the heating; another part of the liquid directly enters the receiving chamber 10 through the flow channel 51 and the outlet 52, fully contacts the heating tube 41, and completes the heating; finally, the heated liquid enters the liquid outlet pipe 14 and flows out from the outlet end 141; at this time, the heating and pumping of the liquid are completed.

[0048] It should be noted that the liquid flowing out of the liquid outlet of the impeller 3 will first gather in the inner cavity of the liquid outlet portion 502 of the flow bushing 5, and then flow into the receiving chamber 10 from the outlet 52 through the flow channel 51, which can slow down the flow rate of the liquid, thereby converting the kinetic energy of the liquid into pressure energy and realizing energy conversion.

[0049] In summary, the pump 100 of the present invention arranges a flow bushing 5 in the casing 1, and arranges a plurality of spirally extending flow channels 51 and a plurality of outlets 52 corresponding to the plurality of flow channels 51 on the flow bushing 5, thereby not increasing the overall size of the pump 100, and the installation structure is more compact, meeting the requirement of miniaturization of the casing 1 structure, and at the same time achieving high-efficiency hydraulic performance.

[0050] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A pump, comprising a housing having a receiving cavity, a driving device mounted at one end of the housing, and a heating device extending into the receiving cavity, wherein the driving device is provided with a driving shaft extending into the receiving cavity, characterized in that: The pump also includes a flow bushing accommodated in the housing, the drive shaft extends into the flow bushing, the flow bushing is provided with a flow channel and an outlet connected to the flow channel, the flow channel extends in a spiral shape to be connected to the outlet, the flow channel is provided with a first wall, in the spiral direction of the flow channel, the width and height of the first wall gradually increase compared to the starting position of the flow channel, the outlet is provided with a second wall, the second wall is located at an end of the flow channel away from the starting position and is arranged approximately perpendicular to the first wall, the housing is provided with a third wall matched with the first wall and a fourth wall matched with the second wall, the third wall extends in a spiral shape, and the fourth wall is arranged approximately perpendicular to the third wall, the flow bushing includes a liquid inlet portion and a liquid outlet portion, the outlet is provided at the liquid outlet portion and is provided with at least two, the flow channel is provided at the liquid outlet portion and is correspondingly provided with at least two, and each flow channel extends in a spiral shape to be connected to the corresponding outlet.

2. The pump according to claim 1, characterized in that: The liquid inlet portion and the liquid outlet portion are coaxially arranged.

3. The pump according to claim 2, characterized in that: The outlet and the flow channel are arranged on a side of the liquid outlet portion close to the liquid inlet portion, three outlets and three flow channels are arranged, and the three flow channels and the corresponding three outlets are evenly distributed on the liquid outlet portion.

4. The pump according to claim 2, characterized in that: The pump further comprises a sealing ring arranged between the liquid inlet portion and the housing to seal a gap between the housing and the flow bushing.

5. The pump according to claim 2, characterized in that: The heating device includes a spirally extending heating tube, a first fixed tube portion located at one end of the heating tube, and a second fixed tube portion located at the other end of the heating tube. The heating tube surrounds the outer side of the liquid inlet portion, and the extension directions of the first fixed tube portion and the second fixed tube portion are parallel to each other.

6. The pump according to claim 5, characterized in that: The cover shell includes a mounting portion for fixing the heating device, and the mounting portion includes a mounting wall formed on the cover shell and a mounting shell assembled with the mounting wall. In the assembly direction of the mounting shell, the first fixed tube portion and the second fixed tube portion extend obliquely into the accommodating cavity.

7. The pump according to claim 6, characterized in that: The installation wall is provided with a protrusion, and the installation shell is correspondingly provided with a through hole for limiting and accommodating the protrusion.

8. The pump according to claim 6, characterized in that: The mounting portion further includes a sealing gasket disposed between the mounting wall and the mounting shell.

Images