CN110966217A

CN110966217A - Pump of washing device

Info

Publication number: CN110966217A
Application number: CN201811154874.7A
Authority: CN
Inventors: 徐双超; 董媛媛; 焦立业; 李涛; 杨林; 陈玉玲; 王科; 潘凤娟
Original assignee: Qingdao Haier Dishwasher Co Ltd
Current assignee: Qingdao Haier Dishwasher Co Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-04-07

Abstract

The invention discloses a pump of a washing device, which comprises a pump body; the pump body forms a pump cavity for containing liquid through the first pump shell and the second pump shell which are buckled; the pump body is provided with a liquid inlet and a liquid outlet which are communicated with the pump cavity; an impeller connected with the motor is arranged in the pump cavity; the heating component is arranged from the outside of the pump body to the inside of the pump cavity and used for heating liquid in the pump cavity; the first pressure switch is arranged on the pump body and connected with the heating assembly; the impeller divides the pump cavity into a first cavity close to the liquid inlet and a second cavity far away from the liquid inlet; the heating assembly is arranged in the second chamber; and the circulating hole is arranged on the impeller body, so that the liquid in the second chamber flows back to the impeller and flows out of the liquid outlet. The invention provides a pump of a washing device, which reduces the volume of a pump body, improves the flow field condition in a pump cavity by improving the structure of an impeller, and ensures that a thermal field in the pump cavity becomes more uniform by the structural change of a heating assembly.

Description

Pump of washing device

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to a pump of a washing device.

Background

With the improvement of living standard, the requirement of consumers on living quality is higher and higher, and the requirements on the quality, the performance, the humanization of use, the intellectualization of operation and the like of products are higher and higher. The dishwasher, as an excellent product, also gradually enters the life of people, and at present, the technology of the dishwasher generally uses a heating pump with integrated washing and heating functions, and a pump body with a heating function generally comprises an upper pump shell, a lower pump shell, an impeller installed in the pump shell, a motor for driving the impeller to rotate, a heating body for heating fluid, and the like. Several existing heating pumps need a compact liquid driving and heating component in the application scene of a household appliance which is applied to liquid driving and continuous circulation heating, the heating body is installed inside the pump shell or is a part of the pump shell (such as an upper pump shell or a lower pump shell) independently, and the heating body installed inside the pump shell, such as an annular heating pipe, needs to be wound between the outer side of the impeller and the pump shell, so that the pump shell volume of the pump is increased, and the pump efficiency is reduced. Meanwhile, the safety protection device measures of the heating pipe are lost, and the heating pipe cannot pass the test under abnormal conditions, such as a heating pipe dry burning test. In addition, the heating body is a part of the pump shell of the heating pump, and the pump shell needs good sealing and heat resistance, so that the sealing structure of the pump shell and the heating pipe is generally complex, and the comprehensive cost of part manufacturing, assembly and the like is high.

Chinese patent application No. CN201810240903.5 discloses a heat pump for a dishwasher and a dishwasher having the same, the heat pump for a dishwasher including: a pump housing having a heating pump chamber therein, the heating pump chamber having an inlet and an outlet; the motor is provided with a rotating shaft and is connected with the pump shell, and the rotating shaft extends into the heating pump cavity; the impeller is arranged in the heating pump cavity and is arranged on the rotating shaft, the impeller comprises a body part and an extension part, and the diameter of the extension part is smaller than that of the body part; the heating assembly comprises a heating pipe, a fuse and a heating wire arranged in the heating pipe; the heating assembly is disposed between the inlet and the impeller, the inner diameter of the arcuate section is greater than the outer diameter of the impeller extension, and the inner diameter of the arcuate section is less than the outer diameter of the body portion.

Chinese patent application No. cn201810143548.x discloses a heat collecting pump and a dishwasher, wherein the heat collecting pump includes: the pump shell is provided with a pump cavity, and the upper end of the pump shell is provided with a water inlet and a water outlet; the separator is arranged in the pump cavity and divides the pump cavity into a primary pump cavity and a secondary pump cavity, the secondary pump cavity is positioned above the primary pump cavity, a first spiral diffusion flow channel positioned in the primary pump cavity is formed on the separator, a flow channel outlet communicated with the secondary pump cavity is arranged at the tail end of the first spiral diffusion flow channel, and at least part of the top wall of the first spiral diffusion flow channel is communicated with the secondary pump cavity; the secondary pump cavity is communicated with the water outlet; the heating element is arranged in the secondary pump cavity; the impeller is arranged in the primary pump cavity; and the communicating piece is used for communicating the water inlet with the first-stage pump cavity.

Although the above prior art proposes a technical solution for solving the problems of dry burning prevention of the heating pump, large volume of the pump body, poor flow uniformity, and the like, the efficiency is low when the liquid circulates in the pump body; the heating assembly occupies an overlarge space in the pump body; the heating pipe part of the heating assembly is provided with technical defects, which cause uneven heating or overlarge local stress caused by thermal coupling, and influence on the service life of the heating pipe.

Therefore, it is necessary to improve the defects of the prior art, and a pump of a washing device is provided, which can reduce the volume of the pump body on the premise of ensuring the function of the pump body, improve the washing accommodating space of the washing device, and simultaneously improve the flow domain condition in the pump cavity by improving the structure of the impeller, so that the flow is more uniform, the impact on the cavity wall is reduced, the service life of the pump body is prolonged, and the structural change of the heating assembly is realized, so that the thermal field in the pump cavity becomes more uniform, and the problem caused by thermal coupling is avoided.

The present invention has been made in view of this situation.

Disclosure of Invention

The technical problem underlying the present invention is to overcome the drawbacks of the prior art and to provide a pump for a washing apparatus which overcomes or at least partially solves the above mentioned problems.

In order to solve the technical problems, the invention adopts the technical scheme that: a pump for a washing device comprising

A pump body;

the pump body forms a pump cavity for containing liquid through the first pump shell and the second pump shell which are buckled;

the pump body is provided with a liquid inlet and a liquid outlet which are communicated with the pump cavity;

an impeller connected with the motor is arranged in the pump cavity;

also comprises

The heating component is arranged from the outside of the pump body to the inside of the pump cavity and used for heating liquid in the pump cavity;

the first pressure switch is arranged on the pump body and connected with the heating assembly;

the impeller divides the pump cavity into a first cavity close to the liquid inlet and a second cavity far away from the liquid inlet;

the heating assembly is arranged in the second chamber;

and the circulating hole is arranged on the impeller body, so that the liquid in the second chamber flows back to the impeller and flows out of the liquid outlet.

Wherein, the

Liquid flows into the pump cavity through the liquid inlet, sequentially flows through the impeller and the heating assembly and then flows out of the liquid outlet;

in one embodiment, the projection of the liquid outlet in the pump cavity at least covers the impeller and part of the heating assembly, and the arrangement of covering the impeller and the heating assembly enables the deposited liquid in the second cavity to be effectively circulated, so that unsmooth circulation of a flow field caused by excessive deposition of the liquid in the second cavity is avoided, and further the use of the pump body is influenced.

Further, the above

The impeller comprises a first impeller body which is matched with the first pump shell in shape and a second impeller body which is provided with blades;

the first wheel body is provided with a water inlet corresponding to the liquid inlet;

at least one circulating hole is formed between the two blades on the second wheel body;

a liquid outlet cavity is formed between the first wheel body and the second wheel body;

through redefining the impeller structure, the liquid flow area in the pump cavity is replanned, the flow of the liquid in the pump cavity is more uniform, and the impact on the cavity wall caused by too many corners is avoided.

Further, the liquid flows into the impeller through the liquid inlet to form drainage along with the blades,

the first water way flows through the liquid outlet cavity and flows out of the liquid outlet;

the water flows through the liquid outlet cavity, enters the second cavity, flows back to the liquid outlet cavity from a circulating hole arranged on the second wheel body, and finally flows together to a second water channel of the first water channel flowing out from the liquid outlet;

meanwhile, through the impeller structure, a second water path which flows back to the interior of the impeller from the circulation hole at the lower part of the impeller is arranged, so that the heating function of the heating assembly on liquid is ensured, the drainage basin in the pump cavity is more reasonable, the integration of suction and discharge is realized, meanwhile, the occupation of the impeller and the heating assembly on the space of the pump cavity is reduced, and the size of the pump body is reduced.

In one embodiment, the circulation holes have a diameter equal to or greater than 5% of the impeller diameter.

Further, the

The liquid inlet comprises a section of drainage wall which extends into the pump cavity;

the drainage arm extends into a water inlet arranged on the first wheel body and introduces liquid flowing through the liquid inlet into a liquid outlet cavity of the impeller;

through the structure that sets up the drainage arm between the inlet to the impeller and the pump body for liquid can directly flow in the impeller, has avoided setting up too high or too big or too complicated drainage structure on the impeller, simultaneously, carries out the shape between the impeller and the pump body and constructs suitable setting, very big reduction the clearance between the impeller and the pump body, makes the volume of the pump body obtain further reducing.

Still further, the

At least one bulge is arranged on one surface of the blade facing the first wheel body at intervals;

corresponding small holes are arranged on the first wheel body corresponding to the bulges arranged on the blades;

when the first wheel body is buckled with the second wheel body, the bulge passes through the small hole, and after the fusion treatment, the first wheel body and the second wheel body form an integral structure;

redefining the connection relation of the first wheel body and the second wheel body of the impeller, and enabling the first wheel body and the second wheel body to be integrated through hot melting after being positioned through bulges and small holes.

In one embodiment, the vanes are volute vanes which are arranged on the second wheel body and extend from the rotation center of the impeller to the edge of the impeller;

the width of the blade is gradually reduced along with the extension arrangement towards the edge of the impeller;

in one embodiment, the number of blades is a prime number;

the outlet angle formed by the extension line of the blade and the rotating tangent line of the blade is between 30 degrees and 50 degrees, and the performance of the overall structure of the impeller and the effect on drainage of a drainage basin are improved by adopting the arc-shaped blade and a specific outlet angle;

and, said

The inner wall of the pump body adopts an involute design, and a water retaining rib is formed on the inner wall of the pump cavity close to the liquid outlet through the extension of the involute;

in one embodiment, the ratio of the area of the liquid outlet after the liquid outlet is blocked by the water blocking rib to the area of the liquid outlet is less than or equal to 0.67;

in one embodiment, the involute angle is between 3 ° and 7 °;

in one embodiment, the ratio of the diameter of the impeller to the diameter of the pump body is between 0.75 and 0.85, and an involute design is adopted in the pump body, so that the reasonability of a liquid flow field in the pump body is improved, and the performance and the service life of the structure of the pump body are also improved.

And, the above-mentioned

The heating assembly extends into the pump cavity from the radial direction of the pump body, and extends into the pump cavity from the radial direction of the pump body, so that a plane included angle is avoided between the heating assembly and the impeller, noise is generated when liquid circulates in the pump cavity, and trickle flow is generated under the action of the included angle to impact the wall of the pump cavity, so that the service life of the pump body is influenced after long-time use;

in addition, the heating assembly comprises

The heating pipe, and a fuse and a heating wire arranged in the heating pipe;

the first heating unit, the second heating unit and the third heating unit are arranged in sequence and matched with the pump body through penetrating bolts and nuts, so that the heating pipe is connected with the pump body, the connection mode of the heating assembly and the pump body is redefined, the heating assembly is subjected to clamping force inside and outside the pump body, the sealing performance of the device is improved, the disassembly, the maintenance and the replacement of a pressure switch of the heating assembly are improved, and the user experience is improved;

in one embodiment, a heating tube includes an arcuate section, a first linear section, and a second linear section;

the first straight line section is connected with one end of the arc section, and the second straight line section is connected with the other end of the arc section;

the fuse is arranged in at least one of the first straight line section and the second straight line section and is far away from the arc-shaped section;

the heating pipe extends into a second cavity in the pump cavity from the side part of the pump body;

the arc-shaped part surrounds the impeller and is spaced from the impeller;

in one embodiment, the arc-shaped section, the first straight line section and the second straight line section of the heating pipe are located in the same plane to form a heating plane for heating liquid flowing through, thermal stress coupling is more uniform on the heating pipe, the structure of the heating pipe is more compact, and the situation that the service life of a heating assembly is shortened or safety accidents are caused due to local stress concentration is avoided.

Further, the

The first heating unit forms a cover body or a shell or a gland and extends outwards from the pump cavity to realize the sealing of the second heating unit in the pump cavity;

the first heating unit prevents the second heating unit from being heated and deforming in the bolt installation direction;

the first heating unit is also provided with an induction hole for inducing the liquid level in the pump cavity for the first pressure switch;

in one embodiment, the second heating unit is matched with the mounting groove on the pump body and the third heating unit, extends into the pump cavity from the outer side to the inner side of the pump body, and realizes the sealing of the pump cavity under the action of the first heating unit;

in one embodiment, the third heating unit is matched with the mounting groove on the pump body, the second heating unit is pressed against the mounting groove of the pump body from the outer side of the pump body to the inner side, and therefore the second heating unit is sealed;

in one embodiment, the first heating unit, the second heating unit and the third heating unit form a mounting plane by matching with a mounting groove arranged on the pump body.

In one embodiment, the first pressure switch is connected with the heating assembly to form a sensing plane which penetrates through the sensing hole from the inside of the pump chamber and senses the liquid level in the pump chamber.

In one embodiment, the

The induction plane of the first pressure switch for inducing the liquid level in the pump cavity is not lower than the induction plane of the heating assembly for heating the liquid in the pump cavity, and/or the installation plane formed by the heating assembly and the installation groove in a matched mode, so that the dry burning of the heating assembly is effectively avoided, the pressure switch in the same induction plane is sensitive to the liquid in the pump cavity, the working efficiency of the pump body is improved, and the waste of energy is also avoided;

in one embodiment, the sensing plane is coplanar with the heating plane and the mounting plane.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the mounting plane and the heating plane of the heating component are arranged in the same plane, so that the heating pipe is ensured to be more uniformly coupled with thermal stress and more compact in structure in the heating process, and the condition that the service life of the heating component is shortened or a safety accident is caused due to local stress concentration is avoided;

2. furthermore, the induction plane and the heating plane of the pressure switch and/or the mounting plane are arranged in the same plane, so that the dry burning of the heating assembly is effectively avoided, the pressure switch in the same induction plane can more sensitively induce the liquid in the pump cavity, the working efficiency of the pump body is improved, and the waste of energy is also avoided;

3. furthermore, the position relation of the impeller and the heating assembly is set, so that the condition of a flow area in the pump cavity is improved, the flow is more uniform, the heating efficiency is higher, the heating assembly is arranged at the lower part of the impeller, the heating efficiency is ensured, the extra occupation of the heating assembly on the space of the pump body is reduced, the heating assembly is prevented from being impacted by liquid entering the pump cavity, and the safety performance of the heating assembly is improved;

4. furthermore, the structure of the heating assembly is improved, the pressure switch is combined with the heating assembly, so that the heating plane, the mounting plane and the sensing plane are located on the same plane, meanwhile, the connection mode of the heating assembly and the pump body is redefined through the improvement of the structure of the heating assembly, so that the heating assembly is clamped inside and outside the pump body, the sealing performance of the device is improved, the disassembly, the maintenance and the replacement of the pressure switch of the heating assembly are improved, and the user experience is improved;

5. furthermore, the liquid flow area in the pump cavity is re-planned by re-defining the impeller structure, the flow of liquid in the pump cavity is more uniform, the impact on the cavity wall caused by excessive corners is avoided, meanwhile, a second water path which flows back to the interior of the impeller from the lower circulation hole of the impeller is arranged on the impeller structure, the liquid heating function of the heating assembly is guaranteed, the flow area in the pump cavity is more reasonable, the integration of suction and discharge is realized, meanwhile, the occupation of the impeller and the heating assembly on the space of the pump cavity is reduced, and the volume of the pump body is reduced;

6. furthermore, by arranging the structure of the drainage arm between the impeller and the liquid inlet of the pump body, liquid can directly flow into the impeller, so that the phenomenon that the impeller is provided with an overhigh or overlarge or complicated drainage structure is avoided, and meanwhile, the shape between the impeller and the pump body is arranged in a proper structure, so that the gap between the impeller and the pump body is greatly reduced, and the volume of the pump body is further reduced;

7. furthermore, the connection relation of the first wheel body and the second wheel body of the impeller is redefined, so that the first wheel body and the second wheel body are positioned through bulges and small holes and then are melted into a whole, and arc-shaped blades and a specific outlet angle are adopted, so that the performance of the overall structure of the impeller is improved, and the effect of draining a drainage basin is achieved;

8. furthermore, the inside of the pump body adopts an involute design, so that the reasonability of a liquid flow field in the pump body is improved, and the performance and the service life of the structure of the pump body are also improved;

9. furthermore, a water retaining rib formed by an extension line of an involute is additionally arranged at the liquid outlet pipe on the inner wall of the pump cavity, so that the action of the impeller on liquid can be effectively increased, the action time is prolonged, and the water pressure is increased;

10. further, stretch into the pump intracavity with heating element from the radial direction of the pump body, avoided forming the plane contained angle between heating element and the impeller for liquid produces the noise when pump chamber inner loop, and under the effect of contained angle, produces the trickle simultaneously, causes the impact to the pump chamber wall, uses the life who influences the pump body for a long time.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In the drawings:

FIG. 1 is an exploded view of the pump body structure of the washing apparatus of the present invention, showing the mating relationship of the various components in the pump body;

FIG. 2 is a first schematic view of a sectional view of the pump body of the washing device of the present invention, illustrating the arrangement of the heating assembly, the impeller, etc. inside the pump body;

FIG. 3 is a second schematic view of a cross-sectional view of the pump body structure of the washing apparatus of the present invention, rotated 90 degrees on the basis of FIG. 2, showing the internal chamber of the pump body structure from another angle;

FIG. 4 is a first schematic view of the pump body structure of the present invention showing the heating element exploded from its various parts in the direction of installation;

FIG. 5 is an exploded second schematic view of the heating element of the pump body structure of the present invention, with portions of the heating element shown exploded from another perspective as in FIG. 4;

FIG. 6 is a schematic cross-sectional view of a heating assembly of the pump body structure of the present invention, the heating assembly being shown in cross-section based on a front view;

FIG. 7 is an exploded pictorial illustration of the impeller of the pump body structure of the present invention;

FIG. 8 is a schematic view of the impeller basin of the pump body structure of the present invention, illustrating the basin formed by the flow of liquid in the impeller;

FIG. 9 is a schematic top view of the second wheel of the impeller of the present invention, with the outlet angle shown in top view;

FIG. 10 is a schematic diagram of the involute profile of the pump body of the present invention, showing primarily the involute angle in the involute design in the pump cavity;

FIG. 11 is a first schematic view of the pump body structure of the present invention, showing mainly the technical solution of providing a second pressure relief at the outlet;

FIG. 12 is a second schematic view of the pump body structure of the present invention, which mainly shows the technical solution of arranging a temperature switch at the outer side of the pump body;

FIG. 13 is a third schematic view of the pump body structure of the present invention, which mainly shows the water blocking ribs disposed on the inner wall of the pump cavity near the liquid outlet.

In the figure: 1. a pump body; 1.1, a first pump casing; 1.2, a second pump casing; 1.3, an involute angle; 2. a pump chamber; 2.1, a first chamber; 2.2, a second chamber; 3. a liquid inlet; 4. a liquid outlet; 5. an impeller; 5.1, circulating holes; 5.2, a first wheel body; 5.3, a second wheel body; 5.4, a water inlet; 5.5, a liquid outlet cavity; 5.6, a first waterway; 5.7, a second waterway; 5.8, blades; 5.9, a bulge; 5.10, small holes; 5.11, outlet angle; 6. a motor; 7. a heating assembly; 7.1, heating a pipe; 7.1.1, arc section; 7.1.2, a first straight line segment; 7.1.3, a second straight line segment; 7.2, bolts; 7.3, a nut; 7.4, a first heating unit; 7.5, a second heating unit; 7.6, a third heating unit; 7.7, a first through hole group; 7.8, induction holes; (ii) a 7.9, a second through hole group; 7.10, fixing seats; 7.11, a third through hole group; 7.12, a first jaw; 7.13, a first card slot; 7.14, pressing grooves; 7.15, fixing holes; 8. a pressure sensing part; 8.1, a first pressure switch; 8.2, a second pressure switch; 9. a drainage wall; 10. a liquid outlet pipe; 11. a first mounting seat; 12. a temperature switch; 13. a second mounting seat; 14. positioning pins; 15. positioning seats; 16. a seal ring; 17. a second jaw; 18. a second card slot; 19. positioning ribs; 20. mounting grooves; 21. a water retaining rib.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

With the improvement of living standard, the requirement of consumers on living quality is higher and higher, and the requirements on the quality, the performance, the humanization of use, the intellectualization of operation and the like of products are higher and higher. The dishwasher is an excellent product and gradually enters the life of people, the technology of the dishwasher generally uses a heating pump with integrated washing and heating functions, and the pump body 1 with the heating function generally comprises an upper pump shell, a lower pump shell, an impeller 5 arranged in the pump shell, a motor 6 for driving the impeller 5 to rotate, a heating body for heating fluid and the like. Several existing heating pumps need a compact liquid driving and heating component in the application scene of a household appliance which is applied to liquid driving and continuous circulation heating, the heating body is installed inside the pump shell or is a part of the pump shell (such as an upper pump shell or a lower pump shell) independently, and the heating body installed inside the pump shell, such as an annular heating pipe 7.1, needs to be wound between the outer side of the impeller 5 and the pump shell, so that the pump shell volume of the pump is increased, and the pump efficiency is reduced. Meanwhile, the safety protection device measures of the heating pipe 7.1 are lost, and the test under abnormal conditions cannot be passed, such as the heating pipe 7.1 dry burning test. In addition, the heating body is a part of the pump shell of the heating pump, and the pump shell and the heating pipe 7.1 are generally complex in sealing structure and high in comprehensive cost of part manufacturing, assembly and the like because the pump shell needs good sealing and heat resistance.

Therefore, aiming at the technical problems existing in the use, the invention provides a pump body 1 structure of a washing device, which can reduce the volume of the pump body 1 and improve the washing accommodating space of the washing device on the premise of ensuring the functions of the pump body 1, and meanwhile, the structure of an impeller 5 is changed to improve the condition of a flow area in the pump cavity 2, so that the flow is more uniform, the impact on the cavity wall is reduced, the service life of the pump body 1 is prolonged, and the thermal field in the pump cavity 2 is more uniform through the structural change of a heating assembly 7, so that the problems caused by thermal coupling are avoided, and the invention is particularly as follows.

FIG. 1 is an exploded schematic view of a pump body 1 of a washing device of the present invention, which is used to show the matching relationship of each component in the pump body 1, and as can be seen from FIG. 1, the pump body 1 of the washing device is divided into two parts, namely a pump body 1 and a heating component 7, wherein the heating plane of the heating component 7 and the installation plane are located in the same plane, so as to ensure that thermal stress coupling is more uniform on a heating pipe 7.1 during heating, the structure of the heating pipe 7.1 is more compact, and the situation of short service life or safety accident of the heating component 7 caused by local stress concentration is avoided, in addition, a first pump case 1.1, a second pump case 1.2, a positioning pin 14, a positioning seat 15, a sealing ring 16, a second pump case 1.2 and a motor 6 are respectively arranged along the rotation direction of an impeller 5 in the pump body 1 according to the installation sequence, the first pump case 1.1 and the second pump case 1.2 in the pump body 1 are connected through a second clamping jaw 17, it can also be seen that the first pressure switch 8.1 is connected with the heating component 7 in common in fig. 1, and the purpose of the setting is to set the sensing plane and the heating plane of the pressure switch, and/or the mounting plane is set in the same plane, so that the dry burning of the heating component 7 is effectively avoided, the pressure switch in the same sensing plane is more sensitive to the liquid sensing in the pump cavity 2, the working efficiency of the pump body 1 is improved, and the waste of energy is also avoided.

Fig. 2 is a first schematic diagram of a sectional view of the structure of the pump body 1 of the washing device of the present invention, which is used to show the arrangement of the heating assembly 7 and the impeller 5 inside the pump body 1, and from fig. 2, it can be seen that the sectional view of the structure of the pump body 1 including the heating assembly 7 is seen, and it can be clearly seen that the heating assembly 7 is arranged at the lower part of the impeller 5, specifically, the lower part of the impeller 5 refers to the orientation when the liquid inlet 3 of the structure of the pump body 1 is upward and the motor 6 is downward, and this orientation is also the position when the structure of the pump body 1 is mounted on the washing device, the projection of the liquid outlet 4 in the pump cavity 2 can be seen, at least the impeller 5 and a part of the heating assembly 7 are covered, the deposited liquid in the second cavity 2.2 is effectively circulated by the arrangement of the impeller 5 and the heating assembly 7, and the poor circulation of the flow field, and then influence the use of the pump body 1, in addition, through the position relation setting of impeller 5 and heating element 7, the condition of basin in the pump chamber 2 has been improved, make the flow more even, heating efficiency is higher, set up heating element 7 in the lower part of impeller 5, when having guaranteed heating efficiency, reduced heating element 7 and taken up the extra in the pump body 1 space, also avoided heating element 7 to receive the impact of entering pump chamber 2 interior liquid, the security performance of heating element 7 has been promoted.

Fig. 3 is a second schematic diagram of a sectional view of the structure of the pump body 1 of the washing device of the present invention, which is rotated 90 degrees on the basis of fig. 2, and shows the internal cavity of the structure of the pump body 1 from another angle, specifically, fig. 3 is a left side view of fig. 2, and mainly aims to clearly show the pump cavity 2 in the structure of the pump body 1, as can be seen from fig. 3, the impeller 5 divides the pump cavity 2 into a first cavity 2.1 close to the liquid inlet 3 and a second cavity 2.2 far from the liquid inlet 3, the heating assembly 7 is disposed in the second cavity 2.2, the arrangement of the impeller 5 and the heating assembly 7 improves the flow area condition in the pump cavity 2 by the positional relationship, so that the flow rate is more uniform, the heating efficiency is higher, the heating assembly 7 is disposed at the lower part of the impeller 5, the additional occupation of the space of the pump body 1 by the heating assembly 7 is reduced while the heating efficiency is ensured, and the heating assembly 7 is prevented, the safety of the heating assembly 7 is improved.

Fig. 4 is a first schematic diagram of the explosion of the heating assembly 7 of the pump body 1 structure of the present invention, which shows the explosion of each part of the heating assembly 7 along the installation direction of the heating assembly 7, and decomposes the structure inside the heating assembly 7 one by one, so that it can be seen that the heating plane formed by the heating pipe 7.1 of the heating assembly 7 and the installation plane formed by the installation part of the heating assembly 7 are in the same plane, which ensures that the thermal stress coupling is more uniform on the heating pipe 7.1 in the heating process, the structure of the heating pipe 7.1 is more compact, and the situation of short service life of the heating assembly 7 or occurrence of safety accidents caused by local stress concentration is avoided;

fig. 5 is a second schematic diagram of the heating assembly 7 of the pump body 1 according to the present invention, from another perspective as shown in fig. 4, the heating assembly 7 is shown exploded, in order to show another structure of the first heating unit 7.4, the second heating unit 7.5 and the third heating unit 7.6, it can be seen from fig. 5 that the third heating unit 7.6 is provided with a sinking groove, the second heating unit 7.5 is embedded in the sinking groove of the third heating unit 7.6, the first heating unit 7.4 is matched with the second heating unit 7.5 and the third heating unit 7.6 outside the pump cavity 2 from inside the pump cavity 2, and the second heating unit 7.5 is clamped by the bolt 7.2 and the nut 7.3, so as to achieve the sealing of the heating assembly 7 and the pump body 1;

fig. 6 is a schematic cross-sectional view of the heating assembly 7 of the pump body 1, in which the heating assembly 7 is shown in cross-section on the basis of a front view, and the technical solution shown in fig. 5 is further shown from the cross-sectional condition of the front view;

fig. 7 is an exploded view of the impeller 5 of the pump body 1 according to the present invention, in which the first wheel body 5.2 of the impeller 5 is separated from the second wheel body 5.3, so as to facilitate the further understanding of the impeller 5 described in the present application, the connection relationship between the first wheel body 5.2 and the second wheel body 5.3 of the impeller 5 is redefined, so that the first wheel body 5.2 and the second wheel body 5.3 are positioned by the protrusions 5.9 and the small holes 5.10 and then are fused into a whole, and the performance of the overall structure of the impeller 5 and the effect of guiding the flow field are improved by using the arc-shaped blades 5.8 and the specific outlet angle 5.11;

fig. 8 is a schematic view of a flow field of an impeller 5 of the pump body 1 according to the present invention, which shows a flow field formed by liquid flowing in the impeller 5, and as can be seen from fig. 8, the liquid flows into the impeller 5 through a liquid inlet 3 to form a flow guide along with blades 5.8, and flows through a liquid outlet cavity 5.5 and a first water path 5.6 flowing out from a liquid outlet 4; flows through the liquid outlet cavity 5.5, enters the second cavity 2.2, flows back to the liquid outlet cavity 5.5 from a circulating hole 5.1 arranged on the second wheel body 5.3, and finally flows together to the first water channel 5.6 and flows out of the second water channel 5.7 from the liquid outlet 4; meanwhile, the impeller 5 is provided with the second water path 5.7 which flows back to the impeller 5 from the circulation hole 5.1 at the lower part of the impeller 5, so that the liquid heating function of the heating component 7 is ensured, the drainage basin in the pump cavity 2 is more reasonable, the integration of suction and discharge is realized, the space occupation of the impeller 5 and the heating component 7 on the pump cavity 2 is reduced, and the volume of the pump body 1 is reduced;

fig. 9 is a schematic top view of the second wheel 5.3 of the impeller 5 according to the present invention, in which the outlet angle 5.11 is shown for the convenience of a person skilled in the art to understand the outlet angle 5.11 of the blade 5.8;

fig. 10 is a schematic view of an involute of a pump body 1, which mainly shows an involute angle 1.3 in an involute design in a pump cavity 2, so that a person skilled in the art can further understand the use of the involute on the pump body 1, and it should be noted that fig. 10 is only a schematic view, a water retaining rib 21 is further disposed on one side of an inner wall of the pump cavity 2, which is close to a liquid outlet 4, and fig. 10 is not shown, but does not represent a specific structure inside the pump cavity 2, and is shown in fig. 10;

fig. 11 is a first schematic view of the structure of the pump body 1 of the present invention, which mainly shows a technical scheme of disposing a second pressure switch at the liquid outlet 4, and it should be noted that fig. 11 disposes a first pressure switch 8.1 and a second pressure switch 8.2 in the same fig. 11, but does not represent that the second pressure switch 8.2 or the first pressure switch 8.1 is necessarily required at the same time when disposing the first pressure switch 8.1 or the second pressure switch 8.2, and when one of the pressure switches is removed, the scheme is still feasible, and only the mounting port needs to be blocked by a plug or other liquid leakage measures;

fig. 12 is a second schematic view of the structure of the pump body 1 of the present invention, which mainly shows the technical scheme of disposing the temperature switch 12 at the outer side of the pump body 1, and it should be noted that the technical scheme of the temperature switch 12 in fig. 12 may also include the technical scheme of disposing the first pressure switch 8.1 and/or the second pressure switch 8.2, and when the temperature switch 12 is removed, the installation opening may be blocked by the plug body or other liquid leakage measures;

fig. 13 is a third schematic view of the structure of the pump body 1 of the present invention, which mainly shows that the water-retaining rib 21 is disposed on the inner wall of the pump cavity 2 near the liquid outlet 4, and a section of the water-retaining rib 21 is additionally disposed inside the pump cavity 2 near the liquid outlet 4, that is, at the position of the liquid outlet pipe 10, and the water-retaining rib 21 formed by the extension line of the involute is added at the liquid outlet pipe 10 on the inner wall of the pump cavity 2, so that the force action of the impeller 5 on the liquid can be effectively increased, the action time can be prolonged, and the water pressure can.

The technical solution described above is applied to the specific embodiment as follows.

Example one

As shown in fig. 1 to 13, the pump of the washing apparatus according to the present embodiment includes a pump body 1; a pump cavity 2 for containing liquid is arranged in the pump body 1; the pump body 1 is provided with a liquid inlet 3 and a liquid outlet 4 which are communicated with the pump cavity 2; an impeller 5 connected with a motor 6 through a rotating shaft is arranged in the pump cavity 2; the heating component 7 is arranged from the outside of the pump body 1 to extend into the pump cavity 2 and is used for heating the liquid in the pump cavity 2; the first pressure switch 8.1 is arranged on the pump body 1 and connected with the heating component 7; the impeller 5 divides the pump cavity 2 into a first chamber 2.1 close to the liquid inlet 3 and a second chamber 2.2 far from the liquid inlet 3; the heating component 7 is arranged in the second chamber 2.2, and when liquid flows into the pump chamber 2 through the liquid inlet 3, the liquid flows through the impeller 5 and the heating component 7 in sequence and then flows out from the liquid outlet 4.

Example two

As shown in fig. 1 to 13, this embodiment is a further limitation of the first embodiment, in the pump of the washing apparatus of this embodiment, the projection of the liquid outlet 4 in the pump cavity 2 at least covers the impeller 5 and a part of the heating assembly 7, and by the arrangement of covering the impeller 5 and the heating assembly 7, the deposited liquid in the second chamber 2.2 is effectively circulated, so as to avoid that the circulation of the flow field is not smooth due to excessive deposition of the liquid in the second chamber 2.2, and further the use of the pump body 1 is affected.

EXAMPLE III

As shown in fig. 4 and fig. 5, in this embodiment, which is a further limitation of the first embodiment or the second embodiment, the heating assembly 7 of the pump of the washing apparatus of this embodiment includes a heating pipe 7.1, and a fuse and a heating wire disposed inside the heating pipe 7.1; set gradually and cooperate through bolt 7.2 and nut 7.3 that pass, realize heating pipe 7.1 and the first heating unit 7.4 of pump body 1 connection, second heating unit 7.5 and third heating unit 7.6, redefined the connected mode of heating element 7 with the pump body 1, make heating element 7 all receive the clamp force inside and outside the pump body 1, the sealing performance of device has been promoted, also make the dismantlement to heating element 7, the maintenance has obtained the improvement to pressure switch's change, user experience has been promoted.

Further, the heating tube 7.1 comprises an arc-shaped section 7.1.1, a first straight section 7.1.2 and a second straight section 7.1.3; the first straight line section 7.1.2 is connected with one end of the arc section 7.1.1, and the second straight line section 7.1.3 is connected with the other end of the arc section; the fuse is arranged in at least one of the first straight line section 7.1.2 and the second straight line section 7.1.3 and is far away from the arc section 7.1.1; the heating pipe 7.1 extends into the second chamber 2.2 in the pump cavity 2 from the side part of the pump body 1; the arcuate portion surrounds the impeller 5 and is spaced from the impeller 5.

Example four

As shown in fig. 4 and 5, this embodiment is further defined by any one of the first to third embodiments, and in the pump of the washing apparatus of this embodiment, the arc-shaped section 7.1.1, the first straight line section 7.1.2 and the second straight line section 7.1.3 of the heating pipe 7.1 are located in a common plane to form a heating plane for heating the liquid flowing through, so that the thermal stress coupling is more uniform on the heating pipe 7.1, the structure of the heating pipe 7.1 is more compact, and the situation of short service life of the heating assembly 7 or occurrence of a safety accident due to local stress concentration is avoided.

EXAMPLE five

As shown in fig. 4 and 5, in this embodiment, which is a further limitation of any one of the first to fourth embodiments, the first heating unit 7.4 of the pump of the washing device of this embodiment is disposed in the pump cavity 2; the first straight line section 7.1.2, the second straight line section 7.1.3 and the bolt 7.2 pass through a first through hole group 7.7 arranged on the first heating unit 7.4 from the inner side of the pump chamber 2 to the outer side, the first through hole group 7.7 is a through hole for positioning the first straight line section 7.1.2, the second straight line section 7.1.3 and the bolt 7.2 of the heating pipe 7.1, can be the same size or different sizes, and is convenient for being distinguished from other heating units, therefore, the first through hole group 7.7 is called in the first heating unit 7.4, in addition, the first heating unit 7.4 is also provided with a sensing hole 7.8 for sensing the liquid level in the pump chamber 2 for the first pressure switch 8.1, the liquid of the pump chamber 2 passes through the sensing hole 7.8, and the height of the liquid level is transferred to the first pressure switch 8.1, and as can be seen from fig. 4 and 5, the first through hole group 7.7 arranged on the first heating unit 7.4 and the sensing hole 7.8 are in the same plane.

EXAMPLE six

As shown in fig. 4 and 5, in this embodiment, which is further limited by any one of the first to fifth embodiments, in the pump of the washing apparatus of this embodiment, the first heating unit 7.4 forms a cover or a housing or a gland to seal the second heating unit 7.5 in the pump cavity 2, the first heating unit 7.4 prevents the second heating unit 7.5 from being heated and deformed in the installation direction of the bolt 7.2, and further, the hardness of the first heating unit 7.4 is greater than that of the second heating unit 7.5.

EXAMPLE seven

As shown in fig. 4 and 5, in this embodiment, which is further limited to any one of the first to sixth embodiments, in the pump of the washing apparatus of this embodiment, the second heating unit 7.5 is matched with the mounting groove 20 and the third heating unit 7.6 on the pump body 1, and extends into the pump cavity 2 from the outer side to the inner side of the pump body 1, and under the action of the first heating unit 7.4, the sealing of the pump cavity 2 is realized, after the first straight line segment 7.1.2, the second straight line segment 7.1.3 and the bolt 7.2 pass through the first heating unit 7.4, the second straight line segment 7.9 corresponding to the first through hole group 7.7 is passed through the second heating unit 7.5, the second heating unit 7.5 is further provided with a fixing seat 7.10 matched with the first pressure switch 8.1, the fixing seat 7.10 corresponds to the sensing hole 7.8, the first pressure switch 8.1 is fixed to the heating assembly 7 through the fixing seat 7.10, as shown in fig. 4 and 5, fixing base 7.10 is hollow structure, and first pressure switch 8.1 passes hollow fixing base 7.10 through the arch 5.9 that the front end set up, realizes fixedly.

Example eight

As shown in fig. 4 and 5, in the present embodiment, which is a further limitation of any one of the first to seventh embodiments, the fixing seat 7.10 of the pump of the washing device in the present embodiment is a column structure having elasticity or having a threaded or buckled inside.

Example nine

As shown in fig. 4 and 5, in this embodiment, which is a further limitation of any one of the first to eighth embodiments, in the pump of the washing apparatus of this embodiment, the third heating unit 7.6 is engaged with the mounting groove 20 on the pump body 1, and the second heating unit 7.5 is pressed against the mounting groove 20 of the pump body 1 from the outside to the inside of the pump body 1, so as to seal the second heating unit 7.5, the first straight line segment 7.1.2, the second straight line segment 7.1.3 and the bolt 7.2 are inserted through the third through hole group 7.11 corresponding to the first through hole group 7.7 and the second through hole group 7.9, which is provided on the third heating unit 7.6, and the fixing hole 7.15 is provided to be engaged with the fixing seat 7.10 of the second heating unit 7.5, and the fixing hole 7.15 is mainly provided for the first pressure switch 8.1 to be inserted through the third heating unit 7.6.

Example ten

As shown in fig. 4 and 5, in this embodiment, which is a further limitation of any one of the first to ninth embodiments, the first heating unit 7.4, the second heating unit 7.5 and the third heating unit 7.6 of the pump of the washing device in this embodiment form a mounting plane by matching with the mounting groove 20 provided on the pump body 1.

Furthermore, after the first pressure switch 8.1 is connected with the heating component 7, an induction plane is formed inside the pump cavity 2, sequentially passes through the induction hole 7.8, the fixing seat 7.10 and the fixing hole 7.15, and induces the liquid level in the pump cavity 2.

EXAMPLE eleven

As shown in fig. 4 and 5, in this embodiment, a sensing plane of the first pressure switch 8.1 sensing a liquid level in the pump cavity 2 is not lower than a heating plane of the heating assembly 7 heating the liquid in the pump cavity 2, and/or an installation plane formed by the heating assembly 7 and the installation groove 20 in a matching manner, and/or the sensing plane and the heating plane of the pressure switch, and/or the installation plane are arranged in the same plane, so that occurrence of dry burning of the heating assembly 7 is effectively avoided, the pressure switch in the same sensing plane senses the liquid in the pump cavity 2 more sensitively, the working efficiency of the pump body 1 is improved, and waste of energy is also avoided.

Example twelve

As shown in fig. 4 and 5, in this embodiment, which is a further limitation of any one of the first to eleventh embodiments, the sensing plane of the pump of the washing apparatus is coplanar with the heating plane and the mounting plane.

EXAMPLE thirteen

As shown in fig. 1 to 13, the present embodiment is further limited to any one of the first to the twelfth embodiments, and the pump of the washing device according to the present embodiment includes a pump body 1; the pump body 1 forms a pump cavity 2 for containing liquid through a first pump shell 1.1 and a second pump shell 1.2 which are buckled; the pump body 1 is provided with a liquid inlet 3 and a liquid outlet 4 which are communicated with the pump cavity 2; an impeller 5 connected with a motor 6 is arranged in the pump cavity 2; the heating component 7 is arranged from the outside of the pump body 1 to extend into the pump cavity 2 and is used for heating the liquid in the pump cavity 2; the impeller 5 divides the pump cavity 2 into a first chamber 2.1 close to the liquid inlet 3 and a second chamber 2.2 far from the liquid inlet 3; the heating component 7 is arranged in the second chamber 2.2; and the circulating hole 5.1 is arranged on the body of the impeller 5, and is used for enabling the liquid in the second chamber 2.2 to flow back to the impeller 5 and flow out from the liquid outlet 4.

Example fourteen

As shown in fig. 7 to 10, in this embodiment, which is further limited by any one of the first to the thirteenth embodiments, the impeller 5 of the pump of the washing device in this embodiment includes a first impeller 5.2 adapted to the shape of the first pump casing 1.1 and a second impeller 5.3 mounted with blades 5.8; the first wheel body 5.2 is provided with a water inlet 5.4 corresponding to the liquid inlet 3; at least one circulation hole 5.1 is arranged between the two blades 5.8 on the second wheel body 5.3; a liquid outlet cavity 5.5 is formed between the first wheel body 5.2 and the second wheel body 5.3; by redefining the structure of the impeller 5, the liquid flow area in the pump cavity 2 is replanned, the flow of the liquid in the pump cavity 2 is more uniform, and the impact on the cavity wall caused by excessive corners is avoided.

Example fifteen

As shown in fig. 7 to 10, in this embodiment, which is further limited to any one of the first to the fourteenth embodiments, in the pump of the washing apparatus of this embodiment, the liquid flows into the impeller 5 through the liquid inlet 3, and flows through the liquid outlet cavity 5.5 and the first water path 5.6 flowing out of the liquid outlet 4 along with the flow of the fluid guided by the blades 5.8; flows through the liquid outlet cavity 5.5, enters the second cavity 2.2, flows back to the liquid outlet cavity 5.5 from a circulating hole 5.1 arranged on the second wheel body 5.3, and finally flows together to the first water channel 5.6 and flows out of the second water channel 5.7 from the liquid outlet 4; meanwhile, through the structure of the impeller 5, the second water path 5.7 which flows back to the inside of the impeller 5 from the lower circulation hole 5.1 of the impeller 5 is arranged, so that the liquid heating function of the heating component 7 is ensured, the drainage basin in the pump cavity 2 is more reasonable, the integration of suction and drainage is realized, meanwhile, the occupation of the impeller 5 and the heating component 7 on the space of the pump cavity 2 is reduced, and the volume of the pump body 1 is reduced.

Example sixteen

As shown in fig. 7 to 10, in the pump of the washing apparatus according to the present embodiment, the diameter of the circulation hole 5.1 is greater than or equal to 5% of the diameter of the impeller 5.

Example seventeen

As shown in fig. 7 to 10, in this embodiment, which is further limited by any one of the first to sixteenth embodiments, the liquid inlet 3 of the pump of the washing apparatus of this embodiment includes a drainage wall 9 extending into the pump cavity 2; the drainage arm extends into a water inlet 5.4 arranged on the first wheel body 5.2, liquid flowing through the liquid inlet 3 is introduced into a liquid outlet cavity 5.5 of the impeller 5, specifically, a gap between the first wheel body 5.2 and the first pump shell 1.1 forms a first cavity 2.1, and the drainage arm extends into the water inlet 5.4 on the first wheel body 5.2, so when the liquid flows into the impeller 5, no liquid flows into the first cavity 2.1, and then certain liquid enters the first cavity 2.1 due to the rotation of the impeller 5, therefore, the first cavity 2.1 has little effect on the working position of the pump body 1, so the first cavity 2.1 is reduced as much as possible in the application, the liquid can directly flow into the impeller 5 by arranging the drainage arm between the impeller 5 and the liquid inlet 3 of the pump body 1, the situation that the impeller 5 is provided with an excessively high or large or complicated drainage structure is avoided, and the shape between the impeller 5 and the pump body 1 is suitable for the arrangement of the structure, the clearance between the impeller 5 and the pump body 1 is greatly reduced, so that the volume of the pump body 1 is further reduced.

EXAMPLE eighteen

As shown in fig. 7 to 10, in this embodiment, which is further limited by any one of the first to seventeenth embodiments, in the pump of the washing device of the present embodiment, at least one protrusion 5.9 is disposed at an interval on the surface of the blade 5.8 facing the first wheel body 5.2; corresponding to the bulges 5.9 arranged on the blades 5.8, corresponding small holes 5.10 are arranged on the first wheel body 5.2; when the first wheel body 5.2 is buckled with the second wheel body 5.3, the bulge 5.9 penetrates through the small hole 5.10, and after the fusion treatment, the first wheel body 5.2 and the second wheel body 5.3 form an integral structure; the connection relationship between the first wheel body 5.2 and the second wheel body 5.3 of the impeller 5 is redefined, so that the first wheel body 5.2 and the second wheel body 5.3 are integrated by heat melting after being positioned by the bulges 5.9 and the small holes 5.10.

Example nineteen

As shown in fig. 7 to 10, in the pump of the washing device according to the present embodiment, the vanes 5.8 are the vortex vanes extending from the rotation center of the impeller 5 to the edge of the impeller 5 and disposed on the second wheel body 5.3; the width of the vanes 5.8 decreases progressively as it extends towards the edge of the impeller 5.

Example twenty

As shown in fig. 7 to 10, in the present embodiment, which is further limited by any one of the first to nineteenth embodiments, the pump of the washing device of the present embodiment has the number of the vanes 5.8 being prime; the outlet angle 5.11 formed by the extension of the blade 5.8 and the tangent of the rotation of the blade 5.8 is between 30 ° and 50 °; the arc-shaped blades 5.8 and the specific outlet angle 5.11 are adopted, so that the performance of the whole structure of the impeller 5 is improved, and the effect of drainage on a drainage basin is achieved.

Example twenty one

As shown in fig. 7 to 10, this embodiment is further limited to any one of the first to twenty embodiments, in the pump of the washing apparatus of this embodiment, the inner wall of the pump body 1 adopts an involute design, a water retaining rib 21 is formed by extending an involute at a position of the inner wall of the pump cavity 2 close to the liquid outlet 4, and the water retaining rib 21 formed by an extension line of the involute is added at the liquid outlet pipe 10 at the inner wall of the pump cavity 2, so that the force action of the impeller 5 on the liquid can be effectively increased, the action time is prolonged, and the water pressure is increased.

Example twenty two

As shown in fig. 7 to 10, in this embodiment, as a further limitation of any one of the first to twenty-first embodiments, in the pump of the washing apparatus in this embodiment, a ratio of an area of the liquid outlet 4 after being blocked by the water blocking rib 21 to an area of the liquid outlet 4 is less than or equal to 0.67.

Example twenty three

As shown in fig. 7 to 10, in this embodiment, which is a further limitation of any one of the first to twenty-two embodiments, the pump of the washing apparatus of this embodiment has an involute angle 1.3 between 3 ° and 7 °.

Example twenty-four

As shown in fig. 7 to 10, in this embodiment, as a further limitation to any one of the first to twenty-third embodiments, in the pump of the washing apparatus in this embodiment, a ratio of the diameter of the impeller 5 to the diameter of the pump body 1 is between 0.75 and 0.85, and an involute design is adopted in the pump body 1, so that the reasonableness of the liquid flow field in the pump body 1 is improved, and the performance and the service life of the structure of the pump body 1 are also improved.

Example twenty-five

As shown in fig. 1 to 13, the present embodiment is further limited to any one of the first to twenty-four embodiments, and the pump of the washing device in the present embodiment includes a pump body 1; a pump cavity 2 for containing liquid is arranged in the pump body 1; the pump body 1 is provided with a liquid inlet 3 and a liquid outlet 4 which are communicated with the pump cavity 2; an impeller 5 connected with a motor 6 is arranged in the pump cavity 2; the heating component 7 is arranged from the outside of the pump body 1 to extend into the pump cavity 2 and is used for heating the liquid in the pump cavity 2; a pressure sensing part 8 which is arranged on the pump body 1 and senses the liquid level in the pump cavity 2; the impeller 5 divides the pump cavity 2 into a first chamber 2.1 close to the liquid inlet 3 and a second chamber 2.2 far from the liquid inlet 3; a heating assembly 7 is arranged in the second chamber 2.2.

Example twenty-six

As shown in fig. 1 to 13, in this embodiment, which is further limited to any one of the first to twenty-fifth embodiments, the pressure sensing portion 8 of the pump of the washing apparatus in this embodiment includes a first pressure switch 8.1 disposed on the pump body 1 and connected to the heating assembly 7; a second pressure switch 8.2 arranged at the liquid outlet 4 of the pump body 1 and connected with the liquid outlet pipe 10; a pressure switch is arranged at the liquid outlet pipe 10 of the pump body 1 to detect the liquid flowing through the liquid outlet 4, so that the heating function of the pump body 1 is further ensured, meanwhile, the pressure switch is directly connected with the liquid outlet pipe 10, the influence of the hot liquid on the pressure switch is avoided, and a first mounting seat 11 for fixing a second pressure switch 8.2 is arranged on the liquid outlet pipe 10; the pressure sensing part 8 senses the liquid level in the pump chamber 2 to form a sensing plane.

Example twenty-seven

As shown in fig. 1 to 13, the present embodiment is further limited to any one of the first to twenty-six embodiments, in the pump of the washing device of the present embodiment, a sensing plane of the pressure sensing portion 8 sensing a liquid level in the pump cavity 2 is not lower than, a heating plane of the heating element 7 heating the liquid in the pump cavity 2, and/or an installation plane formed by the heating element 7 and the installation groove 20 in a matching manner, so that occurrence of dry burning of the heating element 7 is effectively avoided.

Example twenty-eight

As shown in fig. 1 to 13, this embodiment is further limited to any one of the first to twenty-seventh embodiments, in the pump of the washing apparatus of this embodiment, the sensing plane and the heating plane, and/or the installation plane, which are used for sensing the liquid level in the pump cavity 2 by the first pressure switch 8.1, are coplanar, and the pressure switch in the same sensing plane is more sensitive to the liquid in the pump cavity 2, so that the working efficiency of the pump body 1 is improved, and the waste of energy is also avoided.

Example twenty-nine

As shown in fig. 1 to 13, the present embodiment is further limited to any one of the first to twenty-eight embodiments, and the pump of the washing device according to the present embodiment includes a pump body 1; a pump cavity 2 for containing liquid is arranged in the pump body 1; the pump body 1 is provided with a liquid inlet 3 and a liquid outlet 4 which are communicated with the pump cavity 2; an impeller 5 connected with a motor 6 is arranged in the pump cavity 2; the heating component 7 is arranged from the outside of the pump body 1 to extend into the pump cavity 2 and is used for heating the liquid in the pump cavity 2; a second pressure switch 8.2 arranged at the liquid outlet 4 of the pump body 1 and used for sensing the liquid flowing through the liquid outlet 4; the impeller 5 divides the pump cavity 2 into a first chamber 2.1 close to the liquid inlet 3 and a second chamber 2.2 far from the liquid inlet 3; a heating assembly 7 is arranged in the second chamber 2.2.

Example thirty

As shown in fig. 1 to 13, the present embodiment is further limited to any one of the first to twenty-ninth embodiments, in the pump of the washing apparatus of the present embodiment, a liquid outlet pipe 10 is disposed at the liquid outlet 4; a first mounting seat 11 for fixing a second pressure switch 8.2 is arranged on the liquid outlet pipe 10; first mount pad 11 realizes second pressure switch 8.2's fixed through extrusion or screw thread or joint, sets up pressure switch in 1 drain pipe 10 departments of the pump body, detects the liquid of flow through liquid outlet 4, has further guaranteed this heating function of the pump body 1, and simultaneously, pressure switch has avoided because hot liquid process is to pressure switch's influence through with drain pipe 10 lug connection.

Example thirty one

As shown in fig. 1 to 13, this embodiment is further limited to any one of the first to thirty embodiments, in the pump of the washing apparatus of this embodiment, the sensing plane of the second pressure switch 8.2 sensing the liquid level in the pump cavity 2 is not lower than, the heating plane of the heating component 7 heating the liquid in the pump cavity 2, and/or the mounting plane formed by the heating component 7 and the mounting groove 20 in a matching manner, effectively avoiding the occurrence of dry burning of the heating component 7, and the pressure switch in the same sensing plane is more sensitive to the liquid in the pump cavity 2, thereby improving the working efficiency of the pump body 1 and avoiding the waste of energy.

Example thirty-two

As shown in fig. 1 to 13, the present embodiment is further limited to any one of the first to thirty-one embodiments, and the heating plane and the installation plane of the pump of the washing device of the present embodiment are coplanar.

Example thirty-three

As shown in fig. 1 to 13, the present embodiment is further limited to any one of the first to thirty-two embodiments, and the pump of the washing apparatus in the present embodiment includes a pump body 1; a pump cavity 2 for containing liquid is arranged in the pump body 1; the pump body 1 is provided with a liquid inlet 3 and a liquid outlet 4 which are communicated with the pump cavity 2; an impeller 5 connected with a motor 6 is arranged in the pump cavity 2; the heating component 7 is arranged from the outside of the pump body 1 to extend into the pump cavity 2 and is used for heating the liquid in the pump cavity 2; a temperature switch 12 arranged on the pump body 1 for monitoring the temperature of the liquid in the pump cavity 2; the impeller 5 divides the pump cavity 2 into a first chamber 2.1 close to the liquid inlet 3 and a second chamber 2.2 far from the liquid inlet 3; a heating assembly 7 is arranged in the second chamber 2.2.

Example thirty-four

As shown in fig. 1 to 13, in this embodiment, which is further limited by any one of the first to thirty-third embodiments, the pump body 1 of the pump of the washing device of this embodiment is provided with a second mounting seat 13 for fixing the temperature switch 12, the temperature switch 12 extends into the pump cavity 2 from the second mounting seat 13, and the mounting plane of the second mounting seat 13 is parallel to the heating plane of the heating assembly 7.

Example thirty-five

As shown in fig. 1 to 13, in this embodiment, which is further limited to any one of the first to thirty-four embodiments, the mounting plane of the second mounting seat 13 of the pump of the washing apparatus of this embodiment is coplanar with the heating plane of the heating assembly 7.

Example thirty-six

As shown in fig. 1 to 13, in this embodiment, the second mounting seat 13 of the pump of the washing device in this embodiment is fixed to the temperature switch 12 by pressing, screwing or clipping, and the temperature switch 12 is disposed outside the pump body 1, so that the actual heating in the pump cavity 2 can be grasped in multiple dimensions and diversification, and the temperature can be monitored, thereby further avoiding the dry burning problem.

Example thirty-seven

As shown in fig. 1 to 13, the present embodiment is further limited to any one of the first to thirty-six embodiments, and the heating device of the washing pump in the present embodiment includes a heating assembly 7 extending from the outside of the pump body 1 into the pump cavity 2 for heating the liquid in the pump cavity 2; the heating component 7 is connected with the pump body 1 through a mounting groove 20 arranged on the pump body 1; the installation plane formed by connecting the heating component 7 with the pump body 1 through the installation groove 20 is parallel to the heating plane formed by heating the liquid in the pump cavity 2 of the pump body 1 by the heating component 7.

Example thirty-eight

As shown in fig. 1 to 13, the present embodiment is further limited to any one of the first to thirty-seventh embodiments, in the heating device of the washing pump of the present embodiment, the heating assembly 7 includes a heating pipe 7.1, and a fuse and a heating wire disposed inside the heating pipe 7.1; set gradually and cooperate through bolt 7.2 and nut 7.3 that pass, realize heating pipe 7.1 and the first heating unit 7.4 of pump body 1 connection, second heating unit 7.5 and third heating unit 7.6, redefined the connected mode of heating element 7 with the pump body 1, make heating element 7 all receive the clamp force inside and outside the pump body 1, the sealing performance of device has been promoted, also make the dismantlement to heating element 7, the maintenance has obtained the improvement to pressure switch's change, user experience has been promoted.

Example thirty-nine

As shown in fig. 1 to 13, in this embodiment, which is further limited by any one of the first to thirty-eight embodiments, the heating pipe 7.1 of the heating device of the washing pump in this embodiment includes an arc-shaped section 7.1.1, a first straight section 7.1.2 and a second straight section 7.1.3; the first straight line section 7.1.2 is connected with one end of the arc section 7.1.1, and the second straight line section 7.1.3 is connected with the other end of the arc section; the fuse is established in at least one of first straightway 7.1.2 and second straightway 7.1.3 and keep away from segmental arc 7.1.1, and the segmental arc 7.1.1 of heating pipe 7.1, first straightway 7.1.2 and second straightway 7.1.3 are in the same plane of coexistence, form a heating plane with the liquid heating of flowing through, on heating pipe 7.1, thermal stress coupling is more even, and the structure of heating pipe 7.1 is compacter, has avoided the condition that heating element 7 life-span that local stress concentration leads to reduces or the incident takes place.

Example forty

As shown in fig. 1 to 13, in this embodiment, which is further limited by any one of the first to thirty-nine embodiments, in the heating device of the washing pump of this embodiment, the heating pipe 7.1 extends into the pump cavity 2 from the outside of the pump body 1; heating pipe 7.1 is in the pump body 1, be located the another side of the relative inlet 3 of impeller 5, the arc portion encircles impeller 5 and separates apart with impeller 5, position relation through impeller 5 and heating element 7 sets up, the condition of basin in pump chamber 2 has been improved, make the flow more even, heating efficiency is higher, set up heating element 7 in impeller 5's lower part, when having guaranteed heating efficiency, heating element 7 has reduced the extra occupation to pump body 1 space, heating element 7 has also been avoided receiving the impact that gets into liquid in the pump chamber 2, the security performance of heating element 7 has been promoted.

Example forty one

As shown in fig. 1 to 13, in this embodiment, which is a further limitation of any one of the first to forty embodiments, in the heating device of the washing pump of this embodiment, the first heating unit 7.4 is disposed in the pump cavity 2; the first straight line section 7.1.2, the second straight line section 7.1.3 and the bolt 7.2 pass through a first through hole group 7.7 arranged on the first heating unit 7.4 from the inner side of the pump cavity 2 to the outer side; first heating element 7.4 still is provided with induction hole 7.8, induction hole 7.8 is used for passing through liquid, and then the realization is responded to liquid level in pump chamber 2, first heating element 7.4 forms a cover body or casing or gland, realize the sealed of second heating element 7.5 in pump chamber 2, first heating element 7.4 prevents that second heating element 7.5 from being heated, produce deformation in bolt 7.2 installation direction, first heating element 7.4's hardness is greater than second heating element 7.5.

Example forty two

As shown in fig. 1 to 13, in this embodiment, as a further limitation of any one of the first to forty-one embodiments, the heating device of the washing pump in this embodiment, the second heating unit 7.5 is matched with the mounting groove 20 and the third heating unit 7.6 on the pump body 1, extends into the pump cavity 2 from the outer side of the pump body 1 to the inner side, the sealing of the pump cavity 2 is realized under the action of the first heating unit 7.4, after the first straight line section 7.1.2, the second straight line section 7.1.3 and the bolt 7.2 pass through the first heating unit 7.4, the first straight line section 7.1.2, the second straight line section 7.1.3 and the bolt 7.2 are arranged on the second heating unit 7.5 in a penetrating way, a second set of through-holes 7.9, corresponding to the first set of through-holes 7.7, the second heating unit 7.5 is further provided, and the fixed seat 7.10 corresponds to the sensing hole 7.8, the fixed seat 7.10 is used for fixing a first pressure switch 8.1 for sensing the liquid level in the pump cavity 2, and the fixed seat 7.10 is of a cylinder structure with elasticity or internal threads or buckles.

Example forty-three

As shown in fig. 1 to 13, in this embodiment, as a further limitation of any one of the first to forty-two embodiments, in the heating device of the washing pump of this embodiment, the third heating unit 7.6 is engaged with the mounting groove 20 on the pump body 1, and the second heating unit 7.5 is pressed against the mounting groove 20 of the pump body 1 from the outside to the inside of the pump body 1, so as to seal the second heating unit 7.5, the first straight line segment 7.1.2, the second straight line segment 7.1.3 and the bolt 7.2 pass through a third through hole group 7.11 corresponding to the first through hole group 7.7 and the second through hole group 7.9, which is provided on the third heating unit 7.6, and the third heating unit 7.6 is further provided with a fixing hole 7.15 engaged with the fixing seat 7.10 of the second heating unit 7.5.

Further, the first heating unit 7.4, the second heating unit 7.5 and the third heating unit 7.6 form a mounting plane by matching with the mounting groove 20 arranged on the pump body 1.

Example forty-four

As shown in fig. 1 to 13, in this embodiment, which is further limited to any one of the first to forty-three embodiments, in the heating device of the washing pump of this embodiment, the heating element 7 is abutted with the positioning rib 19 provided on the first pump casing 1.1 through the pressing groove 7.14 provided on the third heating unit 7.6, so as to position the heating element 7; heating element 7 docks with first jack catch 7.12 that sets up on first pump case 1.1 through setting up in the first draw-in groove 7.13 of third heating unit 7.6 both sides, realize heating element 7's fixed, specifically, heating element 7 realizes counterpointing with mounting groove 20 with heating element 7 through location muscle 19 and preforming recess 7.14, then insert heating element 7 in the mounting groove 20 of the pump body 1, realize pressing from both sides tightly through buckling first jack catch 7.12 and first draw-in groove 7.13 again, through the improvement of heating element 7 structure, redefine the connected mode of heating element 7 and pump body 1, make heating element 7 all receive the clamp force inside and outside the pump body 1, the sealing performance of device has been promoted, also make the dismantlement to heating element 7, the maintenance has improved to pressure switch's change, user experience has been promoted.

Example forty-five

As shown in fig. 1 to 13, in the present embodiment, as a further limitation of any one of the first to forty-four embodiments, in the heating device of the washing pump of the present embodiment, the installation plane formed by connecting the heating component 7 and the pump body 1 through the installation groove 20 is coplanar with the heating plane formed by heating the liquid in the pump cavity 2 of the pump body 1 by the heating component 7, so that occurrence of dry burning of the heating component 7 is effectively avoided, and the pressure switch in the same sensing plane is more sensitive to the liquid in the pump cavity 2, so that the working efficiency of the pump body 1 is improved, and waste of energy is also avoided.

Example forty-six

As shown in fig. 1 to 13, in the present embodiment, as a further limitation of any one of the first to forty-five embodiments, in the heating device of the washing pump of the present embodiment, the heating assembly 7 extends into the pump cavity 2 from the radial direction of the pump body 1, and extends into the pump cavity from the radial direction of the pump body, so that a planar included angle is avoided between the heating assembly and the impeller, so that the liquid generates noise when circulating in the pump cavity, and at the same time, trickle flow is generated under the effect of the included angle, so as to impact the wall of the pump cavity, and the service life of the pump body is affected after long-term use.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A pump for a washing device comprising

A pump body (1);

the pump body (1) forms a pump cavity (2) for containing liquid through a first pump shell (1.1) and a second pump shell (1.2) which are buckled;

a liquid inlet (3) and a liquid outlet (4) which are communicated with the pump cavity (2) are arranged on the pump body (1);

an impeller (5) connected with a motor (6) is arranged in the pump cavity (2);

the method is characterized in that: also comprises

The heating component (7) is arranged from the outside of the pump body (1) to extend into the pump cavity (2) and is used for heating the liquid in the pump cavity (2);

a first pressure switch (8.1) arranged on the pump body (1) and connected with the heating component (7);

the impeller (5) divides the pump cavity (2) into a first cavity (2.1) close to the liquid inlet (3) and a second cavity (2.2) far away from the liquid inlet (3);

the heating component (7) is arranged in the second chamber (2.2);

and the circulating hole (5.1) is arranged on the body of the impeller (5) and enables the liquid in the second chamber (2.2) to flow back to the impeller (5) and flow out from the liquid outlet (4).

2. A pump for a washing apparatus according to claim 1, characterized in that: the above-mentioned

Liquid flows into the pump cavity (2) through the liquid inlet (3), sequentially flows through the impeller (5) and the heating assembly (7), and then flows out of the liquid outlet (4);

preferably, the projection of the liquid outlet (4) in the pump cavity (2) covers at least the impeller (5) and part of the heating assembly (7).

3. A pump for a washing apparatus according to claim 1, characterized in that: the above-mentioned

The impeller (5) comprises a first impeller body (5.2) which is matched with the first pump shell (1.1) in shape and a second impeller body (5.3) which is provided with blades (5.8);

the first wheel body (5.2) is provided with a water inlet (5.4) corresponding to the liquid inlet (3);

at least one circulation hole (5.1) is arranged between the two blades (5.8) on the second wheel body (5.3);

a liquid outlet cavity (5.5) is formed between the first wheel body (5.2) and the second wheel body (5.3).

4. A pump for a washing apparatus according to claim 3, characterized in that: the liquid flows into the impeller (5) through the liquid inlet (3) to form drainage along with the blades (5.8),

a first water channel (5.6) which flows through the liquid outlet cavity (5.5) and flows out of the liquid outlet (4);

flows through the liquid outlet cavity (5.5), enters the second cavity (2.2), flows back to the liquid outlet cavity (5.5) from a circulating hole (5.1) arranged on the second wheel body (5.3), and finally flows together to the first water channel (5.6) and flows out of the second water channel (5.7) from the liquid outlet (4);

preferably, the aperture of the circulation hole (5.1) is greater than or equal to 5% of the diameter of the impeller (5).

5. A pump for a washing apparatus according to claim 3, characterized in that: the above-mentioned

The liquid inlet (3) comprises a section of drainage wall (9) extending into the pump cavity (2);

the drainage arm extends into a water inlet (5.4) arranged on the first wheel body (5.2) and introduces the liquid flowing through the liquid inlet (3) into a liquid outlet cavity (5.5) of the impeller (5).

6. A pump for a washing apparatus according to claim 3, characterized in that: the above-mentioned

At least one bulge (5.9) is arranged on one surface of the blade (5.8) facing the first wheel body (5.2) at intervals;

a bulge (5.9) is arranged on the corresponding blade (5.8), and a corresponding small hole (5.10) is arranged on the first wheel body (5.2);

when the first wheel body (5.2) is buckled with the second wheel body (5.3), the bulge (5.9) passes through the small hole (5.10), and after the fusion treatment, the first wheel body (5.2) and the second wheel body (5.3) form an integral structure;

preferably, the blades (5.8) are volute blades which are arranged on the second wheel body (5.3) and extend from the rotating center of the impeller (5) to the edge of the impeller (5);

the width of the blade (5.8) is gradually reduced along with the extension arrangement towards the edge of the impeller (5);

more preferably, the number of blades (5.8) is prime;

the outlet angle (5.11) formed by the extension line of the blade (5.8) and the tangent of the rotation of the blade (5.8) is between 30 degrees and 50 degrees;

preferably, the inner wall of the pump body (1) adopts an involute design, and a water retaining rib (21) is formed on the inner wall of the pump cavity (2) close to the liquid outlet through the extension of the involute;

preferably, the ratio of the area of the liquid outlet (4) after the liquid outlet (4) is shielded by the water retaining rib (21) to the area of the liquid outlet (4) is less than or equal to 0.67;

preferably, the inner wall of the pump body (1) adopts an involute design, and the involute angle (1.3) is between 3 degrees and 7 degrees;

again preferably, the ratio of the diameter of the impeller (5) to the diameter of the pump body (1) is between 0.75 and 0.85.

7. A pump for a washing apparatus according to claim 1, characterized in that: the above-mentioned

The heating component (7) extends into the pump cavity (2) from the radial direction of the pump body (1);

preferably, the heating assembly (7) comprises

The heating pipe (7.1) and a fuse and a heating wire which are arranged inside the heating pipe (7.1);

the first heating unit (7.4), the second heating unit (7.5) and the third heating unit (7.6) are sequentially arranged and matched with the nut (7.3) through the penetrating bolt (7.2) to realize the connection of the heating pipe (7.1) and the pump body (1);

more preferably, the heating tube (7.1) comprises an arc-shaped section (7.1.1), a first straight section (7.1.2) and a second straight section (7.1.3);

the first straight line section (7.1.2) is connected with one end of the arc section (7.1.1), and the second straight line section (7.1.3) is connected with the other end of the arc section;

the fuse is arranged in at least one of the first straight line section (7.1.2) and the second straight line section (7.1.3) and is far away from the arc-shaped section (7.1.1);

the heating pipe (7.1) extends into the second chamber (2.2) in the pump cavity (2) from the side part of the pump body (1);

the arc-shaped part surrounds the impeller (5) and is spaced from the impeller (5);

it is also preferred that the arc-shaped section (7.1.1), the first straight section (7.1.2) and the second straight section (7.1.3) of the heating tube (7.1) are located in a common plane, forming a heating plane for heating the liquid flowing through.

8. A pump for a washing apparatus according to claim 7, wherein: the above-mentioned

The first heating unit (7.4) forms a cover body or a shell or a gland and extends outwards from the inside of the pump cavity (2) to realize the sealing of the second heating unit (7.5) in the pump cavity (2);

the first heating unit (7.4) prevents the second heating unit (7.5) from being heated and deforming in the installation direction of the bolt (7.2);

the first heating unit (7.4) is also provided with an induction hole (7.8) for inducing the liquid level in the pump cavity (2) for the first pressure switch (8.1);

preferably, the second heating unit (7.5) is matched with the mounting groove (20) on the pump body (1) and the third heating unit (7.6), extends into the pump cavity (2) from the outer side to the inner side of the pump body (1), and realizes the sealing of the pump cavity (2) under the action of the first heating unit (7.4);

more preferably, the third heating unit (7.6) is matched with the mounting groove (20) on the pump body (1), the second heating unit (7.5) is pressed against the mounting groove (20) of the pump body (1) from the outer side of the pump body (1) to the inner side, and then the second heating unit (7.5) is sealed;

preferably, the first heating unit (7.4), the second heating unit (7.5) and the third heating unit (7.6) form a mounting plane by matching with a mounting groove (20) arranged on the pump body (1).

9. A pump for a washing apparatus according to claim 8, wherein: after the first pressure switch (8.1) is connected with the heating assembly (7), an induction plane which penetrates through the induction hole (7.8) from the inside of the pump cavity (2) and induces the liquid level in the pump cavity (2) is formed.

10. A pump for a washing apparatus, according to claim 9, wherein: the above-mentioned

The induction plane of the first pressure switch (8.1) for inducing the liquid level in the pump cavity (2) is not lower than the induction plane, the heating plane of the heating component (7) for heating the liquid in the pump cavity (2) and/or the installation plane formed by the matching of the heating component (7) and the installation groove (20);

preferably, the sensing plane is coplanar with the heating plane and the mounting plane.