Heating pump for dishwasher and dishwasher

Abstract

The present invention provides a heating pump for a dishwasher and a dishwasher having the heating pump for a dishwasher. The heating pump for a dishwasher includes: a pump housing having a heating pump chamber therein, the heating pump chamber having an inlet and an outlet; the pump housing includes an upper pump housing and a lower pump housing detachably connected to each other, and the inlet and the outlet are formed on the upper pump housing; a motor having a rotating shaft and connected to the pump housing, the rotating shaft extending into the heating pump chamber; an impeller disposed in the heating pump chamber and mounted on the rotating shaft, the impeller including a body portion and an extending portion, the diameter of the extending portion being smaller than the diameter of the body portion; a heating assembly disposed in the upper pump housing; a plurality of buckles are provided on the outer peripheral wall of the upper pump housing at intervals along the circumferential direction of the upper pump housing, and a plurality of clamping grooves adapted to and corresponding to the plurality of buckles one by one are provided on the inner peripheral wall of the lower pump housing; a pressure switch assembly, the pressure switch is mounted on the outer wall of the pump housing and connected to the heating assembly. The heating pump for a dishwasher according to the embodiments of the present invention can reduce the volume.

Description

[0001] This case is a divisional application of a Chinese patent application with the application number 2014101685701, the filing date of April 24, 2014, and the invention title of "Heating Pump for Dishwasher and Dishwasher". Technical Field

[0002] The present invention relates to the technical field of household appliances, and particularly to a heating pump for a dishwasher and a dishwasher having the heating pump for a dishwasher. Background Art

[0003] A fluid pump with a heating function generally includes upper and lower pump housings, an impeller installed in the pump housing, a motor for driving the impeller to rotate, and a heating element for heating the fluid, etc. For several existing heating pumps, the heating element is installed inside the pump housing or is a part of the pump housing alone (such as the upper pump housing or the lower pump housing). For the heating element installed inside the pump housing, such as an annular heating tube, since it needs to be wound between the outside of the impeller and the pump housing, it causes an increase in the volume of the pump housing and a decrease in the pump efficiency. At the same time, the safety protection device measures of the heating tube itself are lacking, and it cannot pass the tests under abnormal conditions, such as the dry burning test of the heating tube. For another heating pump with the heating element as a part of the pump housing, due to the need for good sealing and heat resistance of the pump housing, the sealing structure of the pump housing and the heating tube is generally complex, and the comprehensive costs of part manufacturing and assembly are relatively high. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to some extent.

[0005] For this purpose, an object of the present invention is to provide a heating pump for a dishwasher with a high safety factor, few combined parts, simple assembly, and low cost.

[0006] Another object of the present invention is to provide a dishwasher having the above-mentioned heating pump for a dishwasher.

[0007] The heating pump for a dishwasher according to an embodiment of the present invention includes: a pump housing having a heating pump cavity therein, the heating pump cavity having an inlet and an outlet; the pump housing includes an upper pump housing and a lower pump housing that are detachably connected to each other, the inlet and the outlet are formed on the upper pump housing; a motor having a rotating shaft and connected to the pump housing, the rotating shaft extending into the heating pump cavity; an impeller in the heating pump cavity and installed on the rotating shaft, the impeller including a body portion and an extending portion, the diameter of the extending portion being smaller than the diameter of the body portion; a heating component provided in the upper pump housing, a plurality of buckles are provided on the outer peripheral wall of the upper pump housing at intervals along the circumferential direction of the upper pump housing, and a plurality of clamping grooves adapted to and corresponding to the plurality of buckles are provided on the inner peripheral wall of the lower pump housing; a pressure switch component, the pressure switch is installed on the outer wall of the pump housing and connected to the heating component.

[0008] The heating pump for a dishwasher according to an embodiment of the present invention, an arc section surrounds the extension part and is spaced apart from the extension part, and the fuse is provided in at least one of the first straight section and the second straight section and is away from the arc section. Thus, the length of the straight section can be shortened to reduce the volume of the heating pump for a dishwasher according to an embodiment of the present invention.

[0009] In addition, the heating pump for a dishwasher according to the above embodiment of the present invention may further have the following additional technical features:

[0010] According to an example of the present invention, the upper surface of the buckle includes an inclined plane section and a flat plane section.

[0011] According to an example of the present invention, a sealing ring is provided between the upper pump housing and the lower pump housing, a sealing skeleton is provided between the lower pump housing and the impeller, and the rotating shaft passes through the sealing skeleton.

[0012] According to an example of the present invention, the heating component includes a heating tube, a fuse, and a heating wire provided in the heating tube. The heating tube includes an arc section, a first straight section, and a second straight section. The lower end of the first straight section is connected to the first end of the arc section, the lower end of the second straight section is connected to the second end of the arc section. The heating tube is provided in the heating pump cavity, the upper ends of the first straight section and the second straight section extend out of the pump housing, the fuse is provided in at least one of the first straight section and the second straight section and is away from the arc section, the arc section surrounds the extension part and is spaced apart from the extension part, the arc section is located above the body part, and the inner diameter of the arc section is smaller than the outer diameter of the body part.

[0013] According to an example of the present invention, the heating component further includes a sealing sheet and a mounting pressing sheet. The upper ends of the first and second straight sections pass through the sealing sheet and the mounting pressing sheet, and the heating tube is mounted on the pump housing through the sealing sheet and the mounting pressing sheet.

[0014] According to an example of the present invention, a heating tube mounting portion is provided on the outer wall of the pump housing. The heating tube mounting portion has a through hole, the upper ends of the first straight section and the second straight section extend out through the through hole, the sealing sheet and the mounting pressing sheet clamp the wall of the pump housing, and the sealing sheet and the mounting pressing sheet are fastened to the pump housing by bolts sequentially passing through the sealing sheet, the wall of the pump housing, and the mounting pressing sheet.

[0015] According to an example of the present invention, the heating component further includes a first terminal and a second terminal. The first terminal is provided at the upper end of the first straight segment and is connected to the heating wire through a first wire. The second terminal is provided at the upper end of the second straight segment and is connected to the heating wire through a second wire. The fuse is connected to at least one of the first and second wires.

[0016] According to an example of the present invention, the axially involute volute of the upper pump housing and the upwardly inclined volute of the lower pump housing together form a volute with excellent hydraulic performance to improve the efficiency of the pump body.

[0017] The dishwasher according to an embodiment of the present invention is characterized by including the heating pump for a dishwasher as described in any one of the above.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a heating pump for a dishwasher according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of a heating pump for a dishwasher according to another embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of a heating component of a heating pump for a dishwasher according to an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of an upper pump housing of a heating pump for a dishwasher according to an embodiment of the present invention; and

[0023] Figure 5 is a schematic diagram of a lower pump housing of a heating pump for a dishwasher according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation of the present invention.

[0025] The heating pump for a dishwasher according to an embodiment of the present invention will be described in detail below with reference to the drawings.

[0026] As Figures 1 to 5A heating pump for a dishwasher according to an embodiment of the present invention includes: a pump housing, a motor 20, an impeller 30, a heating component 40, and a pressure switch component 50.

[0027] Specifically, a heating pump chamber (not shown in the figure) is provided inside the pump housing, and the heating pump chamber has an inlet 101 and an outlet 102.

[0028] The motor 20 has a rotating shaft 201 and is connected to the pump housing. The rotating shaft 201 extends into the heating pump chamber.

[0029] The impeller 30 is inside the heating pump chamber and is mounted on the rotating shaft 201. The impeller 30 includes a body portion 301 and an extension portion 302. The diameter of the extension portion 302 is smaller than the diameter of the body portion 301.

[0030] As Figure 4 shown, the heating component 40 includes a heating tube 41, a fuse 42, and a heating wire (not shown) provided inside the heating tube 41.

[0031] The heating tube 41 includes an arc segment 411, a first straight segment 412, and a second straight segment 413. The lower end of the first straight segment 412 is connected to the first end of the arc segment 411. The lower end of the second straight segment 413 is connected to the second end of the arc segment 411. The heating tube 41 is provided inside the heating pump chamber, and the upper ends of the first straight segment 412 and the second straight segment 413 extend out of the pump housing. The fuse 42 is provided in at least one of the first straight segment 412 and the second straight segment 413 and is away from the arc segment 411. The arc segment 411 surrounds the extension portion 302 and is spaced apart from the extension portion 302.

[0032] Advantageously, the pump housing includes an upper pump housing 11 and a lower pump housing 12 that are detachably connected to each other. The inlet 101 and the outlet 102 are formed on the upper pump housing 11. The heating tube 41 is provided inside the upper pump housing 11. The upper pump housing 11 is a flame-retardant upper pump housing.

[0033] The pressure switch 50 is mounted on the outer wall of the pump housing and is connected to the heating component 40.

[0034] The heating pump for a dishwasher according to an embodiment of the present invention, the arc segment surrounds the extension portion and is spaced apart from the extension portion, and the fuse is provided in at least one of the first straight segment and the second straight segment and away from the arc segment. Thus, the length of the straight segment can be shortened to reduce the volume of the heating pump for a dishwasher according to an embodiment of the present invention. In addition, the heating pump for a dishwasher according to an embodiment of the present invention has triple safety protection measures, namely pressure switch protection, fuse protection, and pump shell flame retardant protection. By connecting the pressure switch in series with the heating component, when in a water shortage state, the pressure switch does not act and the heating component is disconnected; if the pressure switch fails, the fuse inside the heating component provides protection; since the upper pump shell is a flame retardant upper pump shell, it can protect the heating pump from catching fire in an extreme state, and the safety factor is high. The heating component has a simple shape, a simple molding process, and less material used.

[0035] Advantageously, according to an example of the present invention, the heating wire is only provided in the arc segment 411. Further, the heating component 40 further includes a sealing piece 43 and a mounting pressing piece 44. The upper ends of the first straight segment 412 and the second straight segment 413 pass through the sealing piece 43 and the mounting pressing piece 44. The heating tube 41 is mounted to the pump shell through the sealing piece 43 and the mounting pressing piece 44.

[0036] Further, as Figure 1 shown, according to an example of the present invention, a heating tube mounting portion 103 is provided on the outer wall of the pump shell. The heating tube mounting portion 103 has a through hole 1031. The upper ends of the first straight segment 412 and the second straight segment 413 extend out through the through hole 1031. The sealing piece 43 and the mounting pressing piece 44 clamp the wall of the pump shell and the sealing piece 43 and the mounting pressing piece 44 are fastened to the pump shell by bolts 45 sequentially passing through the sealing piece 43, the wall of the pump shell, and the mounting pressing piece 44. Thus, the installation is convenient and the sealing performance is good.

[0037] As Figure 4 shown, according to an example of the present invention, the heating component 40 further includes a first terminal 461 and a second terminal 462. The first terminal 461 is provided at the upper end of the first straight segment 412 and is connected to the heating wire through a first wire (not shown). The second terminal 462 is provided at the upper end of the second straight segment 413 and is connected to the heating wire through a second wire (not shown). The fuse 42 is connected to at least one of the first wire and the second wire.

[0038] As Figure 1 shown, according to an example of the present invention, a plurality of buckles 104 are provided on the outer peripheral wall of the upper pump shell 11 and are arranged at intervals along the circumferential direction of the upper pump shell 11. As Figure 5As shown, on the inner peripheral wall of the lower pump housing 12, there are provided a plurality of card slots 121 that are adapted to and correspond one by one to the plurality of buckles 104. Advantageously, the upper surface of the buckle 104 includes an inclined surface segment and a flat surface segment. Thus, the upper pump housing 11 and the lower pump housing 12 can be more closely fitted together.

[0039] As Figure 1 and Figure 2 As shown, according to an example of the present invention, a sealing ring 60 is provided between the upper pump housing 11 and the lower pump housing 12. A sealing skeleton 70 is provided between the lower pump housing 12 and the impeller 30. The rotating shaft 201 passes through the sealing skeleton 70.

[0040] For the heating pump for a dishwasher according to an embodiment of the present invention, the heating component is designed as a combination of an arc segment and a straight segment. The overall shape is simple and it is easy to ensure the forming dimensions of the heating component, so that a relatively uniform gap is maintained with the impeller and the pump body. At the same time, the length of the straight segment is sufficient to install a general fuse, and the installation cost of the heating component is well controlled. In addition, the heating component is placed between the inlet and the impeller, and the inner diameter of the arc segment is greater than the outer diameter of the impeller extension. The arc segment is located above the body part, and the inner diameter of the arc segment is less than the outer diameter of the body part, which can make the overall size design of the pump housing smaller.

[0041] In addition, the axially involute volute of the upper pump housing and the upwardly inclined volute of the lower pump housing together form a volute with excellent hydraulic performance, improving the efficiency of the pump body. The fluid enters the impeller from the inlet, does work through the rotating impeller, advances to the involute volute of the upper pump housing, is heated through the arc segment, and is pumped out from the outlet after being pressurized. Due to the high-speed rotation of the impeller inside the pump body, the fluid does work through the rotation of the impeller, and is in full contact with and exchanges heat with the surface of the arc segment at a high speed, and the heat exchange efficiency is relatively high.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0044] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0046] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A heating pump for a dishwasher, characterized in that: include: A pump housing having a heating pump cavity therein, the heating pump cavity having an inlet and an outlet; the pump housing comprising an upper pump housing and a lower pump housing detachably connected to each other, the inlet and the outlet being formed on the upper pump housing; a motor having a rotating shaft connected to the pump housing, wherein the rotating shaft extends into the heating pump cavity; an impeller, the impeller being in the heat pump cavity and mounted on the rotating shaft, the impeller comprising a main body and an extension, the extension having a diameter smaller than that of the main body; A heating assembly is provided in the upper pump housing, a plurality of buckles are provided on the outer peripheral wall of the upper pump housing and are spaced apart along the circumference of the upper pump housing, and a plurality of slots are provided on the inner peripheral wall of the lower pump housing and are adapted to and correspond to the plurality of buckles; a pressure switch assembly, the pressure switch assembly being mounted on the outer wall of the pump housing and connected to the heating assembly; The heating assembly includes a heating tube, a fuse and a heating wire arranged in the heating tube, the heating tube includes an arc segment, a first straight segment and a second straight segment, the lower end of the first straight segment is connected to the first end of the arc segment, and the lower end of the second straight segment is connected to the second end of the arc segment. The heating tube is arranged in the heating pump cavity, and the upper ends of the first straight segment and the second straight segment extend out of the pump casing. The fuse is arranged in at least one of the first straight segment and the second straight segment and away from the arc segment. The arc segment directly surrounds the outside of the extension part and is spaced apart from the extension part. The arc segment is located above the main body, and the inner diameter of the arc segment is smaller than the outer diameter of the main body.

2. The heating pump for a dishwasher according to claim 1, characterized in that: The upper surface of the buckle includes an inclined surface segment and a flat surface segment.

3. The heating pump for a dishwasher according to claim 1, characterized in that: A sealing ring is provided between the upper pump casing and the lower pump casing, a sealing frame is provided between the lower pump casing and the impeller, and the rotating shaft passes through the sealing frame.

4. The heating pump for a dishwasher according to claim 1, characterized in that: The heating assembly further comprises a sealing sheet and a mounting press sheet, the upper ends of the first and second straight segments pass through the sealing sheet and the mounting press sheet, and the heating tube is mounted on the pump housing through the sealing sheet and the mounting press sheet.

5. The heating pump for a dishwasher according to claim 4, characterized in that: A heating pipe mounting portion is provided on the outer wall of the pump casing, and the heating pipe mounting portion has a through hole, and the upper ends of the first straight line segment and the second straight line segment extend through the through hole, and the sealing sheet and the mounting pressing sheet clamp the wall of the pump casing and are fastened to the pump casing by bolts that pass through the sealing sheet, the wall of the pump casing and the mounting pressing sheet in sequence.

6. The heating pump for a dishwasher according to claim 1, characterized in that: The heating assembly also includes a first terminal and a second terminal. The first terminal is located at the upper end of the first straight segment and is connected to the heating wire through a first wire. The second terminal is located at the upper end of the second straight segment and is connected to the heating wire through a second wire. The fuse is connected to at least one of the first and second wires.

7. The heating pump for a dishwasher according to any one of claims 1 to 6, characterized in that: The axially involute vortex of the upper pump casing and the upwardly inclined vortex of the lower pump casing together form a volute with excellent hydraulic performance, so as to improve the efficiency of the pump body.

8. A dishwasher, characterized in that: The invention comprises a heating pump for a dishwasher according to any one of claims 1 to 7.

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