Heating pump for a dishwasher and dishwasher

Abstract

The present invention provides a heating pump for a dishwasher and a dishwasher equipped with the heating pump. The heating pump comprises: 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 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 comprising a main body and an extension, the diameter of the extension being smaller than the diameter of the main body; and a heating assembly comprising a heating tube, a fuse, and a heating wire disposed within the heating tube. The heating assembly is positioned between the inlet and the impeller, the inner diameter of the arc segment being larger than the outer diameter of the impeller extension, and the inner diameter of the arc segment being smaller than the outer diameter of the main body. A heating pump for a dishwasher according to an embodiment of the present invention can be reduced in size.

Description

[0001] This case is a divisional application of Chinese patent application No. 2014101685701, application date 2014-04-24, and invention title “Heating pump for dishwasher and dishwasher”. Technical Field

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

[0003] A fluid pump with a heating function usually includes an upper and lower pump casing, an impeller installed in the pump casing, a motor for driving the impeller to rotate, and a heating body for heating the fluid. In several existing heating pumps, the heating body is installed inside the pump casing or is a separate part of the pump casing (such as the upper pump casing or the lower pump casing). The heating body installed inside the pump casing, such as the annular heating tube, needs to be wound between the outside of the impeller and the pump casing, which increases the pump casing volume and reduces the pump efficiency. At the same time, the heating tube itself lacks safety protection devices and measures, and cannot pass tests under abnormal conditions, such as the heating tube dry burning test. In addition, for heating pumps where the heating body is part of the pump casing, the pump casing requires good sealing and heat resistance. The sealing structure of the pump casing and the heating tube is generally more complicated, and the overall cost of parts manufacturing and assembly is higher. Summary of the Invention

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

[0005] Therefore, one object of the present invention is to provide a heating pump for a dishwasher which has a high safety factor, few components, is easy to assemble, and is low in cost.

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

[0007] According to an embodiment of the present invention, a heating pump for a dishwasher comprises: a pump housing, wherein the pump housing has a heating pump cavity, wherein the heating pump cavity has an inlet and an outlet; a motor, wherein the motor has a rotating shaft and is connected to the pump housing, wherein the rotating shaft extends into the heating pump cavity; an impeller, wherein the impeller is within the heating pump cavity and is mounted on the rotating shaft, wherein the impeller comprises a main body and an extension, wherein the diameter of the extension is smaller than the diameter of the main body; a heating component, wherein the heating component comprises a heating tube, a fuse, and a heating wire arranged in the heating tube, wherein the heating tube comprises 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 surrounds the extension portion and is spaced apart from the extension portion. The heating assembly is placed between the inlet and the impeller. The inner diameter of the arc segment is larger than the outer diameter of the impeller extension portion, and the inner diameter of the arc segment is smaller than the outer diameter of the main body portion.

[0008] According to 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 arranged 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 the embodiment of the present invention.

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

[0010] According to an example of the present invention, the heating pump for a dishwasher further includes a pressure switch assembly, wherein the pressure switch is mounted on an outer wall of the pump housing and connected to the heating assembly.

[0011] According to an example of the present invention, the heating wire is only provided in the arc segment.

[0012] According to one example of the present invention, the heating assembly further includes a sealing plate and a mounting plate, the upper ends of the first and second straight segments pass through the sealing plate and the mounting plate, and the heating tube is mounted on the pump casing through the sealing plate and the mounting plate.

[0013] According to an example of the present invention, a heating pipe mounting portion is provided on the outer wall of the pump casing, the heating pipe mounting portion has a through hole, the upper ends of the first straight line segment and the second straight line segment extend through the through hole, 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.

[0014] According to an example of the present invention, the heating component also includes a first terminal and a second terminal, the first terminal is arranged at the upper end of the first straight line segment and is connected to the heating wire through a first wire, the second terminal is arranged at the upper end of the second straight line segment and is connected to the heating wire through a second wire, and the fuse is connected to at least one of the first and second wires.

[0015] According to one example of the present invention, the pump casing includes an upper pump casing and a lower pump casing detachably connected to each other, the inlet and outlet are formed on the upper pump casing, the heating pipe is arranged in the upper pump casing, and the upper pump casing is a flame retardant upper pump casing.

[0016] According to an example of the present invention, 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.

[0017] A dishwasher according to an embodiment of the present invention is characterized by comprising any one of the above-mentioned heating pumps for a dishwasher.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by 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 one 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 assembly of a heating pump for a dishwasher according to one 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 one embodiment of the present invention; and

[0023] Figure 5 FIG. 1 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

[0024] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0025] A 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.

[0026] like Figures 1 to 5 A 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 assembly 40 , and a pressure switch assembly 50 .

[0027] Specifically, a heating pump cavity (not shown in the figure) is defined in the pump housing, and the heating pump cavity 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 cavity.

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

[0030] like Figure 4 As shown, the heating assembly 40 includes a heating tube 41 , a fuse 42 and a heating wire (not shown) disposed in the heating tube 41 .

[0031] The heating tube 41 includes an arcuate segment 411, a first straight segment 412, and a second straight segment 413. The lower end of the first straight segment 412 connects to the first end of the arcuate segment 411. The lower end of the second straight segment 413 connects to the second end of the arcuate segment 411. The heating tube 41 is disposed within the heat pump cavity, with the upper ends of the first and second straight segments 412, 413 extending beyond the pump housing. The fuse 42 is disposed within at least one of the first and second straight segments 412, 413 and distal to the arcuate segment 411. The arcuate segment 411 surrounds the extension 302 and is spaced apart from the extension 302.

[0032] Advantageously, the pump housing comprises an upper pump housing 11 and a lower pump housing 12 detachably connected to each other. An inlet 101 and an outlet 102 are formed on the upper pump housing 11. A heating pipe 41 is provided in the upper pump housing 11. The upper pump housing 11 is flame retardant.

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

[0034] According to an embodiment of the present invention, the heating pump for a dishwasher has an arc segment surrounding the extension and spaced apart from the extension, 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. 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 casing flame retardant protection. By connecting the pressure switch in series with the heating assembly, when there is a water shortage, the pressure switch does not operate and the heating assembly is disconnected; if the pressure switch fails, the internal fuse of the heating assembly provides protection; since the upper pump casing is a flame retardant upper pump casing, it can protect the heating pump from catching fire under extreme conditions, and has a high safety factor. The heating assembly has a simple appearance, a simple molding process, and uses less material.

[0035] Advantageously, according to one example of the present invention, the heating wire is located only within the arcuate segment 411. Furthermore, the heating assembly 40 includes a sealing sheet 43 and a mounting plate 44. The upper ends of the first straight segment 412 and the second straight segment 413 pass through the sealing sheet 43 and the mounting plate 44. The heating tube 41 is mounted to the pump housing via the sealing sheet 43 and the mounting plate 44.

[0036] Further, if Figure 1 As shown, according to one example of the present invention, a heating pipe mounting portion 103 is provided on the outer wall of the pump housing. The heating pipe mounting portion 103 has a through-hole 1031. The upper ends of the first straight segment 412 and the second straight segment 413 extend through the through-hole 1031. A sealing sheet 43 and a mounting press 44 clamp the pump housing wall and are secured to the pump housing via bolts 45 that pass through the sealing sheet 43, the pump housing wall, and the mounting press 44, respectively. This facilitates installation and provides excellent sealing performance.

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

[0038] like Figure 1 As shown, according to an example of the present invention, a plurality of buckles 104 are arranged at intervals along the circumference of the upper pump housing 11 on the outer peripheral wall of the upper pump housing 11. Figure 5As shown, the inner peripheral wall of the lower pump housing 12 is provided with a plurality of slots 121 that are adapted and correspond one-to-one with the plurality of buckles 104. Advantageously, the upper surface of the buckle 104 includes an inclined section and a flat section. Thus, the upper pump housing 11 and the lower pump housing 12 can be more tightly matched.

[0039] like 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 frame 70 is provided between the lower pump housing 12 and the impeller 30. The rotating shaft 201 passes through the sealing frame 70.

[0040] According to an embodiment of the present invention, the heating element of a dishwasher heating pump is designed as a combination of curved and straight segments. This results in a simple overall appearance, making it easier to maintain the correct dimensions of the heating element and maintain a relatively uniform gap between the impeller and the pump body. The straight segments are also long enough to accommodate a common fuse, effectively controlling the installation cost of the heating element. Furthermore, the heating element is positioned between the inlet and the impeller, with the inner diameter of the curved segment larger than the outer diameter of the impeller extension and smaller than the outer diameter of the main body, enabling a smaller overall pump housing design.

[0041] Furthermore, the axially involute vortex in the upper pump casing and the upwardly inclined vortex in the lower pump casing together form a volute with excellent hydraulic performance, improving pump efficiency. Fluid enters the impeller at the inlet, where it rotates to generate work. It is then propelled toward the involute volute in the upper pump casing. After being heated and pressurized by the curved sections, it is pumped out through the outlet. Due to the high-speed rotation of the impeller inside the pump, the fluid, generating work through the impeller's rotation, comes into full contact and heat exchange with the curved sections, resulting in high heat exchange efficiency.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 understood as limiting the present invention.

[0043] Furthermore, 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 number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0044] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0047] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify 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; the pump casing includes an upper pump casing and a lower pump casing connected to each other, a sealing frame is provided between the lower pump casing and the impeller, the rotating shaft passes through the sealing frame, the inner diameter of the arc segment is larger than the outer diameter of the impeller extension part, 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: It also includes a pressure switch assembly, which is installed on the outer wall of the pump housing and connected to the heating assembly.

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

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 5, 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 claim 1, characterized in that: The upper pump shell is detachably connected to the lower pump shell, the inlet and the outlet are formed on the upper pump shell, the heating pipe is arranged in the upper pump shell, and the upper pump shell is a flame-retardant upper pump shell.

8. The heating pump for a dishwasher according to claim 7, characterized in that: A sealing ring is provided between the upper pump housing and the lower pump housing.

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

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