CN109645926B - Pump and method of operating the same - Google Patents

Abstract

A pump comprises a driving device, a washing part, a water discharging part and a water diversion disc, wherein the washing part and the water discharging part are arranged at two ends of the driving device, and the water diversion disc is positioned between the washing part and the water discharging part and divides the washing part and the water discharging part from top to bottom. The driving device is provided with a driving shaft, and the washing part and the drainage part are positioned at the upper end and the lower end of the driving shaft. The washing part is provided with a washing chamber, and the pump is also provided with a heater which is fixed on the water distribution disc and extends into the washing chamber. So set up, rational distribution space in the pump, the compactness is strong.

Description

Pump and method of operating the same

Technical Field

The invention relates to the field of household appliances, in particular to a pump.

Background

The market at present has an increasing demand for small-sized, powerful dishwashers. In the field of dishwashers, both heating systems and washing and drain pump systems are used. All three systems require a certain space and assembly method to work in coordination. Therefore, the dishwasher, the washing machine, and the like need to reserve a large space for placing the three systems of the washing pump, the drain pump, and the heater, and need to consume more water and energy. Therefore, there is a strong need to design an improved pump to solve the above problems.

Disclosure of Invention

The invention aims to provide a pump with simple and compact structure.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a pump, includes drive arrangement, installs washing portion, the drainage component at drive arrangement both ends and be located washing portion with between the drainage component and from top to bottom will washing portion with drainage component divided water diversion disc, drive arrangement is equipped with the drive shaft, washing portion with drainage component is located the upper and lower both ends of drive shaft, washing portion is equipped with the washing cavity, the pump still is equipped with and is fixed in just accept on the water diversion disc in the heater in the washing cavity.

As a further improved technical solution of the present invention, the water diversion tray is provided with a top wall for vertically dividing the washing part and the driving device, an accommodating tank recessed from bottom to top on the top wall, and a chamber located below the top wall, the accommodating tank is provided with an inner cavity, two tank side walls located at two sides of the inner cavity and facing the inside of the washing chamber, and a tank bottom wall connecting the two tank side walls, and the heater is closely attached to the tank bottom wall and accommodated in the accommodating tank.

As a further improved technical scheme of the invention, the heater is arranged in a circular ring shape and is provided with a front surface tightly attached to the bottom wall of the groove and a back surface opposite to the front surface, and the back surface is exposed downwards in the cavity.

As a further improved technical solution of the present invention, the pump is further provided with a heating circuit electrically connected to the back surface, and the heating circuit is accommodated in the chamber and is vertically separated from the washing chamber by the top wall.

As a further improved technical solution of the present invention, the water diversion disc is provided with a first wall body extending downward from the outer edge of the top wall, the cavity located in the first wall body, a abdication cavity penetrating through the top wall up and down, and a second wall body extending downward from the top wall along the edge of the abdication cavity, and the heating circuit is arranged around the second wall body.

As a further improved technical scheme of the invention, the heating circuit comprises a temperature controller for detecting the temperature of the medium and a fusing device electrically connected with the temperature controller through an electric bridge, and the temperature controller is electrically connected with the heater.

As a further improved technical solution of the present invention, the bridge is a conductive bridge made of hard material, the bridge is provided with two ends connected with the heater and a main body part connecting the two ends, and the main body part is not in contact with the heating circuit and the heater.

As a further improved technical scheme of the invention, the heating circuit is also provided with a power supply plug-in sheet electrically connected with the fusing device and a plug-in sheet shell for insulating and separating the power supply plug-in sheet and the heater, and the plug-in sheet shell is provided with an accommodating cavity for accommodating the power supply plug-in sheet.

As a further improved technical scheme of the invention, the temperature controller is provided with a preset working temperature, and when the temperature of the medium in the washing chamber reaches the preset working temperature, the temperature controller switches off the heating circuit.

As a further improved technical solution of the present invention, the driving device includes a rotor assembly accommodated in the yielding cavity and a stator assembly accommodated in the cavity and wound around an outer periphery of the rotor assembly.

According to the technical scheme, the heater is integrated on the water distribution disc, so that the internal structure of the pump is reasonably distributed, the heating part is integrated in the axial direction, the size of the pump is reduced, and the space occupation of the pump is greatly reduced.

Drawings

FIG. 1 is a perspective view of the pump with the washing section removed.

FIG. 2 is a perspective view of the pump of the present invention at another angle with the washing section removed.

FIG. 3 is a schematic cross-sectional view of the pump of FIG. 1 according to the present invention.

Fig. 4 is an exploded perspective view of the pump of the present invention.

Fig. 5 is a perspective view of the drain housing of the pump of the present invention.

Fig. 6 is a perspective view of another angle of the drain housing of the pump of the present invention.

FIG. 7 is a perspective view of the pump with the washing section housing and the stator assembly removed.

FIG. 8 is a perspective view of the pump with the washing unit housing and the stator assembly removed.

Reference numerals: 100-a pump; 1-a washing section; 10-a washing chamber; 12-washing the impeller; 13-a water inlet chamber; 2-a drive device; 21-a drive shaft; 22-a rotor assembly; 23-a stator assembly; 24-a bearing; 25-lower bearing support; 250-axial cavity; 251-a side wall; 252-a bottom wall; 2511-water inlet; 2521-a communication hole; 26-a sealing ring; 27-an upper bearing bracket; 3-a drainage part; 30-a drainage chamber; 31-a drain housing; 311-inner wall; 312-a bottom wall; 3112-a flow guide groove; 3113-a lead-in; 3115-a lead-out end; 32-a drainage impeller; 33-a suction duct; 34-a discharge conduit; 35-a separator; 351-fixed end; 352-free end; 4-a water distribution disc; 40-a chamber; 41-a first wall; 42-a top wall; 420-abdication cavity; 421-a second wall body; 422-accommodating groove; 4221-slot sidewalls; 4222-bottom wall of groove; 5-a heater; 51-back side; 6-a heating circuit; 61-temperature controller; 63-a fuse device; 62-bridge; 64-power plug-in sheet; 65-insert housing; 650-containing cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 8, the present invention relates to a pump 100, which is applied to a small dish washer such as a table dish washer, a sink dish washer, a drawer dish washer, etc. The pump 100 comprises a driving device 2, a washing part 1 and a water discharging part 3 which are arranged at two ends of the driving device 2, a water diversion disc 4 which divides the washing part 1 and the water discharging part 3 from top to bottom, a heater 5 arranged on the water diversion disc 4 and a heating circuit 6 which supplies power for the heater 5.

The driving device 2 is a brushless direct current motor capable of rotating forward and backward. The dc brushless motor 2 includes a control circuit (not shown) for controlling the operation of the driving device 2, a driving shaft 21 electrically connected to the control circuit, a rotor assembly 22 electrically connected to the driving shaft 21, a stator assembly 23 located at the periphery of the rotor assembly 22, and two bearings 24 sleeved at the upper and lower ends of the driving shaft 21.

The diversion disc 4 is equipped with first wall body 41, is located cavity 40 in the first wall body 41, is located the cavity 40 top will cavity 40 confined roof 42, be located roof 42 central point puts and the chamber 420 of stepping down that runs through from top to bottom, follows chamber 420 edge of stepping down certainly roof 42 downwardly extending forms second wall body 421 and certainly roof 42 bottom surface caves in the accepting groove 422 that forms from bottom to top. The first wall 41 is annularly surrounded on the outer periphery of the chamber 40. The second wall 421 is annularly surrounded on the periphery of the avoiding cavity 420. The stator assembly 23 is received within the cavity 40. The rotor assembly 22 is received within the yield cavity 420. The receiving groove 422 is provided with an inner cavity (not numbered), two groove side walls 4221 positioned at both sides of the inner cavity, and a groove bottom wall 4222 connecting the two groove side walls 4221, and the heater 5 is closely attached to the groove bottom wall 4222 and is received in the receiving groove 422. The close contact can be a gapless contact or a close contact with a small distance.

The pump 100 is further provided with a lower bearing support 25 for supporting and fixing a bearing 24 provided at the lower end of the drive shaft 21. The lower bearing support 25 is accommodated in the yielding cavity 420 to be excessively interfered with the cavity wall 421 to achieve positioning. The bottom of the lower bearing support 25 is connected and matched with the drainage part 3, and a sealing ring 26 is arranged at the matching position to seal the lower bearing support 25. As shown in fig. 4, the lower bearing bracket 25 includes a shaft cavity 250 for accommodating the bearing 24 and the driving shaft 21, a side wall 251 located at an outer periphery of the shaft cavity 250, a bottom wall 252 connected to the side wall 251 and located at a bottom portion, a water inlet 2511 penetrating the side wall 251 inside and outside, and a communication hole 2521 penetrating the bottom wall 252 up and down.

The washing part 1 includes a washing part housing (not shown), a washing chamber 10 located in the washing part housing, a washing impeller 12 received in the washing chamber 10, a water inlet chamber 13 located below the washing impeller 12 for supplying clean water into the washing chamber 10, and an upper bearing bracket 27 installed at the middle of the bottom of the water inlet chamber 13. An abdicating cavity (not numbered) which penetrates through the upper bearing bracket 27 and the other bearing 24 from top to bottom is arranged at the middle position of the bottom of the water inlet chamber 13. The rotor assembly 22 is located right below the upper bearing support 27, and a plurality of filtering meshes (not numbered) penetrating up and down are further arranged on the bottom wall body of the upper bearing support 27, so that part of water in the washing chamber 10 can enter the abdicating cavity 420 through the filtering meshes to cool the rotor of the rotor assembly 22.

The drain 3 includes a drain housing 31 and a drain impeller 32 mounted in the drain housing 31. The drain housing 31 is provided with a suction duct 33, a drain chamber 30 communicating with the suction duct 33, and a drain duct 34 communicating with the drain chamber 30. The drain impeller 32 is housed in the drain chamber 30. After one bearing 24 is sleeved at the bottom end of the driving shaft 21, the bearing passes through the yielding cavity of the lower bearing support 25 downwards and extends into the drainage chamber 30 to fix the drainage impeller 32 at the bottom end of the driving shaft 21. In the present invention, the pump 100 is a vertical pump. The rotor assembly 22 and the stator assembly 23 are skillfully arranged between the washing part 1 and the water discharging part 3 through the driving shaft 21, so that the space between the washing part 1 and the water discharging part 3 is reasonably utilized, the height of the pump 100 in the axial direction and the width of the pump 100 in the radial direction are reduced, the size of the pump 100 is reduced, and the pump is more suitable for being applied to a small-size dishwasher. In the present embodiment, the thickness of the stator assembly 23 is not more than 30mm, preferably 10 to 20mm, thereby further ensuring the height of the pump 100 in the axial direction.

As shown in fig. 3, 5 and 6, the drainage casing 31 further has an inner wall 311 extending vertically and surrounding the periphery of the drainage impeller 32, and a bottom wall 312 at the bottom of the drainage chamber 30. Inner wall 311 goes up the sunken guiding gutter 3112 that is equipped with, guiding gutter 3112 is spiral and is in encircle and extend from top to bottom and form on inner wall 311. The guide groove 3112 is provided with a lead-in end 3113 communicating with the suction duct 33 and a lead-out end 3115 communicating with the discharge duct 34. Along the height direction of the pump 100, the leading-in end 3113 is higher than the leading-out end 3115, and the width of the guiding groove 3112 extending up and down becomes larger gradually from the leading-in end 3113 to the leading-out end 3115, that is, the width of the leading-in end 3113 extending up and down is smaller than the width of the leading-out end 3115 extending up and down. With such an arrangement, the medium entering the drainage housing 31 is drained out of the drainage housing 31 as soon as possible by the backflow action of the spiral guide groove 3112 and the action of gravity.

The lower half portion of the lower bearing bracket 25 is received in the drain chamber 30 and positioned above the drain impeller 32, the water inlet 2511 is communicated with the suction pipe 33 in the radial direction, and the communication hole 2521 is vertically communicated with the drain chamber 30, so that water flows into the lower bearing bracket 25 through the suction pipe 33 in the radial direction and then flows into the drain chamber 30 through the communication hole 2521 communicated in the axial direction.

Referring to fig. 5 and 6, the drain housing 31 further includes a partition 35 between the drain chamber 30 and the drain pipe 34, and the partition 35 is formed to extend from an inner wall of the drain housing 31, and includes a fixed end 351 and a free end 352 formed to extend from the fixed end 351. The free end 352 extends slightly into the drain chamber 30 of the drain housing, the edge of the free end 352 being tangential to the circumference of the outer diameter of the drain impeller 32. The partition plate 35 partially blocks the lead-out end 3115 in the radial direction of the drain impeller 32, i.e., forms a misalignment. So set up, make baffle 35 can cooperate the anticlockwise rotation of drainage impeller 32 in time block rivers to make can not produce the pressure energy effect in the drainage chamber 30, and then unable drainage.

In this embodiment, an included angle a is formed between the suction pipe 33 and the discharge pipe 34, and the included angle a is in an angle range of 45 degrees to 90 degrees, preferably 60 degrees, which is an optimal angle, so as to facilitate the manufacturing process of the drain casing 31.

Referring to fig. 7 to 8, the heater 5 is a circular heating plate, and has a front surface (not numbered) abutting against the bottom wall 4222 of the receiving groove 422 and a back surface 51 opposite to the front surface, the front surface abuts against the bottom wall 4222, the back surface 51 faces the cavity 40, and the entire heating circuit 6 is mounted on the back surface 51 and received in the cavity 40.

The heating circuit 6 comprises a temperature controller 61 connected with the heater 5 through a circuit, a fusing device 63 for preventing the current of the heating circuit 6 from being too large or the temperature from being too high, an electric connection between the temperature controller 61 and an electric bridge 62 of the fusing device 63, a power supply inserting sheet 64 for connecting the fusing device 63 and an external power supply, and an inserting sheet shell 65 for accommodating the power supply inserting sheet 64. The temperature controller 61 and the fusing device 63 are arranged along the radial direction of the heater 21. The bridge 62 is a conductive bridge made of a conductive material having a certain hardness and surrounding the periphery of the stator assembly 23, and the bridge 62 is provided with two ends electrically connected to the heater 5 and a main body portion (not numbered) connecting the two ends, but the main body portion of the bridge 62 is suspended below the heater 5 and is kept from overlapping with the heater 5 and other components of the heating circuit 6. The bridge is made of a material with hardness, so that the bridge 62 cannot deform due to insufficient hardness, and is overlapped with the heater 5, and the short circuit is avoided.

The temperature controller 61 is configured to detect a temperature of a medium in the washing chamber 10, and when the temperature of the medium reaches a predetermined operating temperature, the temperature controller 61 controls the heating circuit 6 to stop supplying power to the heater 5, and the heater 5 stops heating the medium. When the temperature controller 61 detects that the temperature of the medium in the washing chamber 10 is lower than the predetermined working temperature, the temperature controller 61 controls the heating circuit 6 to be closed to supply power to the heater 5, and the heater 5 heats the medium in the washing chamber 10 until the medium reaches the predetermined working temperature. In this way, the temperature controller 61 is provided in the pump 100 of the present invention, so that the heating circuit 6 can be flexibly adjusted, thereby flexibly heating the medium in the washing chamber 10, and further, the medium in the washing chamber 10 can be maintained at a predetermined working temperature for a long time to work. The fusing device 63 is a fuse, i.e., a fuse. When the current of the heating circuit 6 is too large or the temperature of the medium is too high, the fuse 63 automatically opens, so that the heating circuit 6 is powered off.

The power supply insertion sheet 64 is arranged below the top wall 42, the insertion sheet shell 65 is a plastic piece and is provided with an accommodating cavity 650, and the power supply insertion sheet 64 is exposed in the accommodating cavity 650 to be communicated with an external power supply.

In the present invention, the pump 100 is provided with a washing impeller 12 fixed at the top end of one driving shaft 21 and a drainage impeller 32 fixed at the bottom end, and the washing impeller and the drainage impeller are driven to work by rotating the driving shaft 21, thereby completing two functions of washing and drainage. The drain part 3 is opposite to the operation direction of the washing part 1. When the driving shaft 21 drives the drainage impeller 32 of the drainage portion 3 to rotate forward, the washing impeller 12 and the drainage impeller 2 rotate clockwise, and at this time, the washing portion 1 performs a washing operation normally, and the water after washing flows through the suction pipe 33 of the drainage portion 3 and the water inlet 2511 of the lower bearing bracket 25, radially enters the communication hole 2521, and then axially enters the drainage chamber 30, because the guide groove 3112 in the drainage chamber 30 is designed spirally, and the width of the guide groove 3112 decreases gradually from the leading end 3115 to the leading end 3113 in the rotating direction, the contact area with the inner wall 311 after the water flow rotates clockwise gradually decreases, so that the internal pressure in the whole drainage chamber 30 decreases, and because the edge of the free end 351 of the partition 35 is located on the circumference of the drainage impeller 32, when the water flow driven by the drainage impeller 32 first contacts the free end 351 of the partition 35, the partition 35 exerts a force against the water flow so that the water flow cannot generate pressure energy, the outlet pressure of the lead-out port 3115 is low, and the drain impeller 2 is idle so that the drain work cannot be performed.

On the contrary, as shown by the water flow schematic line in fig. 5, when the driving shaft 21 drives the drainage impeller 32 of the drainage portion 3 to reversely rotate for drainage, the washing impeller 12 and the drainage impeller 2 both rotate counterclockwise, at this time, the washing portion 1 cannot suck water into the washing chamber 10, and thus cannot perform washing work, but the drainage impeller 32 in the drainage chamber 30 rotates counterclockwise to drive water flow, the water flow rotates spirally along the leading-in end 3113 to the leading-out end 3115, the contact area between the counterclockwise water flow and the inner wall 311 of the drainage chamber 30 becomes gradually larger, so that the internal pressure of the drainage chamber 30 can be increased, the drainage impeller 32 drives the water flow to contact the leading-out end 3115 first, the partition 35 cannot provide blocking force, and the drainage pipe 34 performs drainage. At this point, the fuse 63 of the heating circuit 6 is opened, so that the heating circuit 6 is powered off and the heater 5 no longer heats the medium in the washing chamber 10.

In summary, in the pump 100 of the present invention, the heater 5 and the heating circuit 6 are skillfully integrated on the top wall 42 of the water diversion disc 4, and the cavity 40 below the water diversion disc 4 is reasonably utilized to integrate the components of the heating circuit 6 around the stator assembly 23, so as to reasonably utilize the internal space of the pump 100, further reduce the volume of the whole pump 100, and greatly reduce the space occupation.

Terms such as "upper," "lower," "left," "right," "front," "rear," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one feature's relationship to another feature as illustrated in the figures. It will be understood that the spatially relative positional terms may be intended to encompass different orientations than those shown in the figures depending on the product presentation position and should not be construed as limiting the claims. In addition, the descriptor "horizontal" as used herein is not entirely equivalent to allowing an angular tilt along a direction perpendicular to the direction of gravity.

In addition, the above embodiments are only used for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present specification should be based on the technical personnel in the field, and although the present specification has described the invention in detail by referring to the above embodiments, the ordinary skilled in the art should understand that the technical personnel in the field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.

Claims (9)

1. The utility model provides a pump, includes drive arrangement, installs washing portion, the drainage portion at drive arrangement both ends and be located washing portion with between the drainage portion and from top to bottom will washing portion with drainage portion divided water diversion tray, drive arrangement is equipped with the drive shaft, washing portion with drainage portion is located the upper and lower both ends of drive shaft, washing portion is equipped with washing chamber, its characterized in that: the pump is also provided with a heater which is fixed on the water distribution disc and is accommodated in the washing chamber; the water diversion disc is provided with a top wall, a sunken accommodating groove and a cavity, wherein the top wall and the sunken accommodating groove are used for dividing the washing part and the driving device from top to bottom, the accommodating groove is provided with an inner cavity, two groove side walls facing the two sides of the inner cavity and facing the washing cavity, and a groove bottom wall connecting the two groove side walls, and the heater is tightly attached to the groove bottom wall and accommodated in the accommodating groove.

2. The pump of claim 1, wherein: the heater is arranged in a circular ring shape and is provided with a front surface and a back surface, the front surface is tightly attached to the bottom wall of the groove, and the back surface faces the cavity.

3. The pump of claim 2, wherein: the pump is also provided with a heating circuit electrically connected with the back surface, and the heating circuit is accommodated in the cavity and is vertically separated from the washing cavity through the top wall.

4. The pump of claim 3, wherein: the water diversion disc is equipped with certainly roof outer fringe department downwardly extending's first wall body, be located in the first wall body the cavity runs through from top to bottom the chamber of stepping down and the edge of stepping down of roof the chamber edge certainly the second wall body that roof downwardly extending formed, heating circuit encircles the setting and is in around the second wall body.

5. The pump of claim 3, wherein: the heating circuit comprises a temperature controller for detecting the medium temperature in the washing chamber and a fusing device electrically connected with the temperature controller through an electric bridge, and the temperature controller is electrically connected with the heater.

6. The pump of claim 5, wherein: the electric bridge is a conductive bridge made of hard materials, the electric bridge is provided with two ends connected with the heater and a main body part connected with the two ends, and the main body part is not contacted with the heating circuit and the heater.

7. The pump of claim 5, wherein: heating circuit still is equipped with electric connection the power inserted sheet of fusing device and inciting somebody to action the power inserted sheet with the insulating divided inserted sheet shell of heater, the inserted sheet shell is equipped with and is used for acceping the holding chamber of power inserted sheet.

8. The pump of claim 5, wherein: the temperature controller is provided with a preset working temperature, and when the temperature of the medium in the washing chamber reaches the preset working temperature, the temperature controller switches off the heating circuit.

9. The pump of claim 4, wherein: the driving device comprises a rotor assembly accommodated in the yielding cavity and a stator assembly accommodated in the cavity and wound on the periphery of the rotor assembly.

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