Heating pump for a 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; a motor having a rotating shaft and connected to the pump housing, the rotating shaft extending into the heating pump chamber; an impeller within the heating pump chamber and mounted on the rotating shaft, the impeller including a body portion and an extension portion, the diameter of the extension portion being smaller than the diameter of the body portion; a heating component including a heating tube, a fuse, and a heating wire provided within the heating tube; a pressure switch component, the pressure switch being mounted on the outer wall of the pump housing and connected to the heating component, the heating component maintaining a uniform gap with the impeller and the pump body; an arc segment located above the body portion, and the arc segment being at least partially opposite to the body portion in the vertical direction, the inner diameter of the arc segment being smaller than the outer diameter of the body portion. The heating pump for a dishwasher according to an embodiment of the present invention can reduce the volume.

Description

[0001] This is a divisional application of Chinese Patent Application No. 2014101685701, with an application date of April 24, 2014 and an 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 a ring-shaped heating tube, since it needs to be wound between the outside of the impeller and the pump housing, the volume of the pump housing increases, and the pump efficiency decreases. At the same time, the safety protection device measures for 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. In addition, for the 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 more 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 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] A heating pump for a dishwasher according to an embodiment of the present invention includes: a pump housing having a heating pump chamber therein, the heating pump chamber having an inlet and an outlet; a motor having a rotating shaft and connected to the pump housing, the rotating shaft extending into the heating pump chamber; an impeller within the heating pump chamber and mounted on the rotating shaft, the impeller including a body portion and an extension portion, the diameter of the extension portion being smaller than the diameter of the body portion; a heating component including a heating tube, a fuse, and a heating wire disposed within the heating tube, the heating tube including an arc segment, a first straight segment, and a second straight segment, the lower end of the first straight segment being connected to the first end of the arc segment, the lower end of the second straight segment being connected to the second end of the arc segment, the heating tube being disposed within the heating pump chamber, the upper ends of the first straight segment and the second straight segment extending out of the pump housing, the fuse being disposed within at least one of the first straight segment and the second straight segment and away from the arc segment, the arc segment surrounding the extension portion and spaced apart from the extension portion, the heating component maintaining a uniform gap with the impeller and the pump body; the arc segment being located above the body portion, and the arc segment and the body portion being at least partially opposite in the vertical direction, the inner diameter of the arc segment being smaller than the outer diameter of the body portion.

[0008] For 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 disposed within 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.

[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 outer diameter of the arc segment is equivalent to the outer diameter of the body portion.

[0011] According to an example of the present invention, the heating pump for a dishwasher further includes a pressure switch assembly, and the pressure switch is mounted on the outer wall of the pump housing and connected to the heating component.

[0012] According to an example of the present invention, the heating wire is only disposed within the arc segment.

[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 segments pass through the sealing sheet and the mounting pressing sheet, and the heating tube is mounted to the pump housing through the sealing sheet and the mounting pressing sheet.

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

[0015] According to an example of the present invention, the heating component further includes a first wiring terminal and a second wiring terminal. The first wiring terminal is provided at the upper end of the first straight section and is connected to the heating wire through a first wire. The second wiring terminal is provided at the upper end of the second straight section 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 pump housing includes an upper pump housing and a lower pump housing that are detachably connected to each other. The inlet and outlet are formed on the upper pump housing. The heating pipe is provided inside the upper pump housing, and the upper pump housing is a flame-retardant upper pump housing.

[0017] According to an example of the present invention, a sealing ring is provided between the upper pump housing and the lower pump housing, and a sealing skeleton is provided between the lower pump housing and the impeller. The rotating shaft passes through the sealing skeleton.

[0018] The dishwasher according to an embodiment of the present invention is characterized in that it includes the heating pump for a dishwasher according to any one of the above.

[0019] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0020] Figure 1 is a schematic diagram of a heating pump for a dishwasher according to an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of a heating pump for a dishwasher according to another embodiment of the present invention;

[0022] 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;

[0023] 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

[0024] 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 Invention

[0025] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein 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 accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] The heating pump for a dishwasher according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] As Figures 1 to 5 The 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.

[0028] Specifically, a heating pump cavity (not shown in the figure) is provided in the pump housing, and the heating pump cavity has an inlet 101 and an outlet 102.

[0029] The motor 20 has a rotating shaft 201 and is connected to the pump housing. The rotating shaft 201 extends into the heating pump cavity.

[0030] The impeller 30 is in the heating pump cavity 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.

[0031] As Figure 4 As shown, the heating component 40 includes a heating tube 41, a fuse 42, and a heating wire (not shown) provided in the heating tube 41.

[0032] 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 in the heating pump cavity, 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.

[0033] 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 in the upper pump housing 11. The upper pump housing 11 is a flame-retardant upper pump housing.

[0034] The pressure switch 50 is mounted on the outer wall of the pump housing and is connected to the heating component 40.

[0035] 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 appearance, a simple molding process, and less material used.

[0036] 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.

[0037] 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.

[0038] As Figure 4 shown, according to an example of the present invention, the heating component 40 further includes a first wiring terminal 461 and a second wiring terminal 462. The first wiring 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 wiring 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.

[0039] 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 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 plane section and a flat plane section. Thus, the upper pump housing 11 and the lower pump housing 12 can be more closely fitted together.

[0040] As Figure 1 and Figure 2 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.

[0041] 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 section and a straight section. 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 section 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 section is greater than the outer diameter of the impeller extension. The arc section is located above the body portion, and the arc section and the body portion are at least partially opposite in the up-down direction, and the size of the arc section is smaller than the outer diameter of the body portion. According to an example of the present invention, the outer diameter of the arc section is equivalent to the outer diameter of the body portion. This can make the overall size design of the pump housing smaller.

[0042] 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 towards the involute volute of the upper pump housing, is heated through the arc section, 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 comes into full contact with and exchanges heat with the surface of the arc section at a high speed, and the heat exchange efficiency is relatively high.

[0043] In the description of the present invention, it should be understood that 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. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It 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 thus should not be construed as a limitation of the present invention.

[0044] 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.

[0045] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be construed broadly. 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 connection 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.

[0046] 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.

[0047] In the description of this specification, descriptions with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean 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 descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can 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.

[0048] 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, wherein the heating pump cavity has an inlet and an outlet; 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 component, the heating component 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, 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, at least part of the axis of the arc segment is arranged to coincide with the axis of the impeller; the arc segment is located above the main body, and the arc segment and the main body are at least partially opposite in the up and down directions, 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 outer diameter of the arc segment is equivalent to the outer diameter of the main body.

3. The heating pump for a dishwasher according to claim 1, characterized in that: It also includes a pressure switch assembly, which is installed on the outer wall of the pump housing and connected to the heating assembly.

4. The heating pump for a dishwasher according to claim 1, characterized in that: The heating wire is only arranged in the arc segment.

5. 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.

6. The heating pump for a dishwasher according to claim 5, 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.

7. The heating pump for a dishwasher according to claim 6, 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.

8. The heating pump for a dishwasher according to any one of claims 1 to 7, characterized in that: The pump housing includes an upper pump housing and a lower pump housing which are detachably connected to each other. The inlet and the outlet are formed on the upper pump housing. The heating pipe is arranged in the upper pump housing. The upper pump housing is a flame-retardant upper pump housing.

9. The heating pump for a dishwasher according to claim 8, 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.

10. A dishwasher, characterized in that: The invention comprises a heating pump for a dishwasher according to any one of claims 1 to 9.

Images