WO2019119507A1

WO2019119507A1 - Heating pump and washing appliance

Info

Publication number: WO2019119507A1
Application number: PCT/CN2017/119554
Authority: WO
Inventors: 顾文海; 王松
Original assignee: 佛山市威灵洗涤电机制造有限公司
Priority date: 2017-12-19
Filing date: 2017-12-28
Publication date: 2019-06-27
Also published as: EP3751150A1; CN108167230B; EP3751150A4; CN108167230A; EP3751150B1

Abstract

A heating pump and a washing appliance. The heating pump comprises a pump housing (1) and a pump cover assembly (2). The pump housing (1) comprises an outlet and a side wall (11) extending around the outlet. The pump cover assembly (2) comprises an annular support portion (21) covering the outlet and a heating element (22) mounted on the support portion (21) in a thermally conductive manner. The support portion (21) separates the heating element (22) from a fluid in the heating pump, and the surface of the support portion (21) in contact with the fluid is plane. The heating pump and the washing appliance can heat the fluid while pumping the fluid, and are simply structured; the surface of the support portion (21) in contact with the fluid is a plane, thus reducing the friction between the fluid and the support portion (21), improving the pumping efficiency, and reducing the energy consumption.

Description

Heat pump and washing appliance

Technical field

The present invention relates to the field of household appliances, and in particular to a heat pump and a washing appliance having the same.

Background technique

In product development, there is often a need to both heat the fluid and pump the heated fluid, such as dishwashers and washing machines. The conventional treatment method generally involves providing a heating device and a fluid device. This leads to a complicated equipment structure and a large size, which is inconvenient for home use. In addition, an existing integrated heating water pump, although the heating device and the fluid device are integrated, the heating element is installed in the outer concave portion formed to protrude toward the fluid side, that is, a convex portion is formed on the inner side of the pump casing, due to the convexity The large friction area between the fluid and the fluid exerts a significant hindrance to the pumped fluid, resulting in lower pumping efficiency and greater energy consumption.

Therefore, there is a need to design a heat pump capable of heating and pumping at the same time and having a simple structure and high pumping efficiency, and a washing machine having the same.

Summary of the invention

The object of the present invention is to overcome the problems of complicated structure of heating and pumping or low pumping efficiency existing in the prior art, and to provide a heat pump capable of heating and pumping at the same time with simple structure and pumping efficiency. high.

Another object of the present invention is to provide a washing apparatus including the above heat pump.

In order to achieve the above object, an aspect of the present invention provides a heat pump including a pump casing and a pump cover assembly, the pump casing including an outlet and a side wall extending around the outlet, the pump cover assembly including the cover An annular support portion of the outlet and a heating element thermally coupled to the support portion, the support portion separating the heating element from fluid in the heat pump, and the support portion The surface in contact with the fluid is a flat surface.

Preferably, the support portion includes a plate-shaped support ring body extending around the center line in a plane perpendicular to a center line of the outlet, connected to an outer circumference of the support ring body and fixed to the side A retaining ring at the top of the wall and a bent ring connected to the inner periphery of the support ring for connecting an outer tube, the heating element being mounted on the support ring.

Preferably, the heating element comprises an annular heating tube having a notch and a first electrode and a second electrode respectively disposed at both ends of the notch of the annular heating tube; the annular heating tube includes heat conduction with the support ring body A bottom surface of the contact and a side surface connected to the bottom surface and extending in a circumferential direction of the support ring body, the pump cover assembly including a heat conducting plate that thermally conductively connects the side surface to the support ring body.

Preferably, the heat conducting plate comprises a first ring body and a second ring body connected to the first ring body, wherein: the first ring body and the second ring body and the support ring body and the ring body The sides of the heating tube are respectively in surface contact; and/or the first ring body and the second ring body are respectively connected to the side surfaces of the support ring body and the annular heating tube by welding.

Preferably, the pump cover assembly includes a thermostat connecting the first electrode, the second ring body includes a main ring body having an opening and contacting the annular heating tube, and a step portion at the opening And two sides of the step portion in the circumferential direction are respectively spaced apart from both ends of the opening of the main ring body, the step portion including a vertical portion spaced apart from the annular heating tube and located at the a horizontal portion above the annular heating tube, the thermostat is mounted on the horizontal portion, the thermostat includes a first temperature sensing surface, and the first temperature sensing surface is in contact with the step portion.

Preferably, the horizontal portion is at least 1 mm above the annular heating tube; and/or the minimum distance between the thermostat and the first electrode is an arc length on the annular heating tube The value ranges from 5 to 15 mm.

Preferably, the pump cover assembly includes a fuse connected to the second electrode, the fuse includes a second temperature sensing surface, the second temperature sensing surface is in contact with the annular heating tube; and the annular heating tube includes a top surface and two opposite sides connected between the top surface and the bottom surface, the bottom surface having an area larger than an area of the top surface, the fuse support being mounted on the top surface.

Preferably, the pump cover assembly includes an insulated socket, the thermostat, the fuse and the insulated socket being connected in series between the first electrode and the second electrode.

Preferably, the pump cover assembly includes a protective cover on the top of the annular heating tube, the thermostat, the fuse and the insulating socket; and/or the top of the side wall is provided with an outward protrusion a stepped flange, the fixing ring body is provided with a groove-shaped flange which can be engaged and fixed to the outside of the stepped flange, and the pump cover assembly comprises a stepped flange and the grooved flange A seal ring that seals the side wall and the support portion.

A second aspect of the invention provides a washing appliance comprising the above described heat pump.

In the above technical solution, the heating element is thermally conductively mounted on the support portion, the support portion separates the heating element from the fluid in the heat pump, and the fluid can be heated while being pumped, the structure is simple, the volume is small, and the support The surface in contact with the fluid is flat, which can reduce the friction between the fluid and the support, avoids hindering the movement of the fluid, significantly improves the pumping efficiency, and reduces the energy consumption, so as to better meet the user's needs.

DRAWINGS

1 is a partial structural schematic view of a heat pump according to a preferred embodiment of the present invention;

2 is a partial cross-sectional structural view of a heat pump according to a preferred embodiment of the present invention;

3 is another partial structural schematic view of a heat pump according to a preferred embodiment of the present invention;

4 is a schematic structural view of a heat conducting plate according to a preferred embodiment of the present invention.

Description of the reference numerals

1 pump casing 11 side wall

111 step flange 2 pump cover assembly

21 support 211 support ring

212 retaining ring body 2121 groove flange

213 bending ring body 22 heating element

221 annular heating tube 222 first electrode

223 second electrode 23 heat conducting plate

231 first ring body 232 second ring body

2321 main ring body 2322 step

24 thermostat 25 fuse

26 insulated socket 27 protective cover

28 sealing ring L1 short wiring

L2 long wiring

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative and not restrictive.

In the present invention, the orientation words such as "up, down, left, and right" as used generally refer to the above, below, left, and right as shown in the accompanying drawings; "inside and outside". It refers to the inside and outside of the contour of each component itself.

An aspect of the invention provides a heat pump comprising a pump casing 1 and a pump cover assembly 2, the pump casing 1 comprising an outlet and a side wall 11 extending around the outlet, the pump cover assembly 2 comprising a cover An annular support portion 21 at the outlet and a heating element 22 thermally conductively mounted to the support portion 21, the support portion 21 separating the heating element 22 from a fluid within the heat pump, and The surface of the support portion 21 that is in contact with the fluid is a flat surface.

In the above technical solution, as shown in FIGS. 1-4, the heating element 22 is thermally conductively mounted to the support portion 21, and the support portion 21 separates the heating element 22 from the fluid in the heat pump, and can be fluidized while being pumped. Heating, the structure is simple and the volume is small, and the surface of the support portion 21 in contact with the fluid is flat, which can reduce the friction between the fluid and the support portion, avoids hindering the movement of the fluid, significantly improves the pumping efficiency, and reduces the energy. Consumption, so as to better meet user needs.

Wherein, the structure of the support portion 21 has various options. As shown in FIG. 2, preferably, the support portion 21 includes a plate-shaped support ring extending around the center line in a plane perpendicular to a center line of the outlet. a body 211, a fixing ring 212 connected to the outer periphery of the support ring body 211 and fixed to the top of the side wall 11 and a bending ring connected to the inner circumference of the support ring body 211 and used for connecting an external pipe Body 213, the heating element 22 is mounted on the support ring body 211. Specifically, the supporting portion 21 can be punched out using a stainless steel plate, and the connecting portion of the supporting ring body 211 and the fixing ring body 212 and the bending ring body 213 can be rounded, so that the supporting portion and the fluid contact portion can exceed 90. The area above % is a plane, which avoids the obstruction of the fluid and can significantly improve the pumping efficiency.

In addition, the structural composition and shape of the heating element 22 can be flexibly selected according to actual working needs. Preferably, the heating element 22 includes an annular heating tube 221 having a notch and the notch respectively disposed in the annular heating tube 221 The first electrode 222 and the second electrode 223 of the end. Moreover, the annular heating tube 221 may include an outer sleeve, a resistance wire installed in the outer sleeve, and a thermally conductive insulating material filled between the outer sleeve and the electric resistance wire, wherein the outer sleeve may be an aluminum tube, a thermal conductive insulating material It may be MgO. In addition, the annular heating tube 221 may include a bottom surface in thermal conduction contact with the support ring body 211 and a side surface connected to the bottom surface and extending in a circumferential direction of the support ring body 211, the pump The cover assembly 2 includes a thermally conductive plate 23 that thermally conductively couples the sides to the support ring body 211. Thus, heat radiated from the side surface of the annular heating pipe 221 can be conducted to the support ring body 211 through the heat transfer plate 23, and the heating efficiency of the annular heating pipe 221 can be remarkably improved.

The shape of the heat conducting plate 23 has various options. For convenience of processing and manufacturing, as shown in FIG. 2 and FIG. 4, preferably, the heat conducting plate 23 includes a first ring body 231 and a first ring body 231 connected thereto. a second ring body 232, wherein the first ring body 231 and the second ring body 232 are in surface contact with the side surfaces of the support ring body 211 and the annular heating tube 221, respectively, so that the contact area is large The heat dissipated from the side surface of the annular heating tube 221 is quickly and maximally conducted to the support ring body 211. In addition, the first ring body 231 and the second ring body 232 are arranged for reliable structural stability. The side surfaces of the support ring body 211 and the annular heating tube 221 are respectively connected by welding. Wherein, the heat conducting plate 23 can be selected by punching with an aluminum plate.

In order to facilitate measuring the temperature of the fluid, preferably, the pump cover assembly 2 includes a thermostat 24 that connects the first electrode 222, and for ease of installation of the thermostat 24 while making the structure compact, as shown in FIGS. 3 and 4. The second ring body 232 includes a main ring body 2321 having an opening and contacting the annular heating tube, and a step portion 2322 located at the opening, the step portion 2322 being respectively on both sides in the circumferential direction The two ends of the opening of the main ring body 2321 are spaced apart, and the step portion 2322 includes a vertical portion spaced apart from the annular heating tube 221 and a horizontal portion located above the annular heating tube 221, the temperature The controller 24 is mounted on the horizontal portion, the thermostat 24 includes a first temperature sensing surface, and the first temperature sensing surface is in contact with the step portion, so as to minimize the annular heating tube 221 and the annular heating The effect of the primary ring 2321 that the tube 221 contacts on the measurement of the thermostat 24.

Moreover, preferably, the horizontal portion is at least 1 mm higher than the annular heating tube 221, so that the heat received by the step portion 2322 is mostly the fluid temperature, and the accuracy of the measurement result of the thermostat 24 is ensured. Further, in order to reduce the influence of the heat radiated by the annular heating tube 221 and the first electrode 222 on the temperature controller 24, the minimum distance between the temperature controller 24 and the first electrode 222 is in the annular heating tube 221 The arc length on the range is 5-15mm. This position is generally the lowest heat generation position of the annular heating tube 221, which can further improve the accuracy of the measurement result of the thermostat 24.

In order to improve the safe use performance of the device, preferably, the pump cover assembly 2 includes a fuse 25 connected to the second electrode 223, the fuse 25 includes a second temperature sensing surface, and the second temperature sensing surface The annular heating tube 221 is in contact. Moreover, in order to facilitate the installation of the fuse 25, the annular heating tube 221 includes a top surface and two opposite sides connected between the top surface and the bottom surface, the bottom surface having an area larger than the top surface The fuse 25 is supported to be mounted on the top surface. That is, the cross section of the annular heating tube 221 may be trapezoidal or approximately trapezoidal. For example, the aluminum heating tube may be pressed into a substantially trapezoidal shape by high pressure, and the wider bottom surface of the trapezoid is thermally conductively welded to the support ring body 211. together. This can increase the single-sided (bottom) heat transfer area, allowing more heat to be conducted to the support ring 211.

Wherein, for convenience of use (connecting a power source), preferably, the pump cover assembly 2 includes an insulating socket 26, the thermostat 24, the fuse 25 and the insulating socket 26 are connected in series at the first electrode 222 and Between the second electrodes 223, the structure is simple and convenient for assembly.

In order to further improve the safe use performance of the device, preferably, the pump cover assembly 2 includes a protective cover 27 on the top of the annular heating tube 221, the thermostat 24, the fuse 25 and the insulating socket 26. Wherein, the structure of the protective cover 27 can be flexibly designed according to the installation position of the thermostat 24, the fuse 25 and the insulating socket 26, as shown in FIG. 1, when the thermostat 24, the insulation When the socket 26 and the fuse 25 are sequentially disposed on one side of the annular heating tube 221, the thermostat 24 can be connected to the first electrode 222 through the short wiring L1, and the fuse 25 can be connected to the second electrode 223 through the long wiring L2. At this time, the protective cover 27 may include an inner ring disposed above the first ring body 231 of the heat conducting plate 23 and a scallop portion connected to the inner ring and at least two bent plate bodies, and the scallop portion is located at the annular heating tube 221 Above the other side, the long wire L2 can be located above the scallop, and the two bent plates can be used for fixing the thermostat 24 and the fuse 25, respectively, and for fixing and fixing, the scallop and the bent plate body The edge can be bent and fixed below. The slotted flange 2121 outside, wherein the protective 27 can be a metal material of the cover. In addition, in order to facilitate the mounting and fixing, the top surface of the side wall 11 is provided with an outwardly protruding stepped flange 111, and the fixing ring body 212 is provided with a groove-shaped flange that can be engaged and fixed to the outside of the stepped flange 111. 2121, that is to say that the outer circumference of the fixing ring 212 can punch out the tongue to be riveted with the pump casing 1, and in order to improve the sealing performance between the pump cover assembly 2 and the pump casing 1, the pump cover assembly 2 is provided in The stepped flange 111 and the grooved flange 2121 are sealed between the side wall 11 and the sealing ring 28 of the support portion 21.

A second aspect of the invention provides a washing appliance comprising the above described heat pump. The washing appliance may be a dishwasher or the like.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the invention is not limited thereto. Within the scope of the technical idea of the present invention, various simple modifications can be made to the technical solutions of the present invention, including various specific technical features combined in any suitable manner. In order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations. However, these simple variations and combinations are also considered to be the disclosure of the present invention, and are all within the scope of the present invention.

Claims

A heat pump, characterized in that the heat pump comprises a pump casing (1) and a pump cover assembly (2), the pump casing (1) comprising an outlet and a side wall (11) extending around the outlet, The pump cover assembly (2) includes an annular support portion (21) that covers the outlet and a heating element (22) that is thermally conductively mounted to the support portion (21), the support portion (21) The heating element (22) is spaced from the fluid within the heat pump and the surface of the support portion (21) in contact with the fluid is planar.
A heat pump according to claim 1, wherein said support portion (21) includes a plate-shaped support ring body (211) extending around said center line in a plane perpendicular to a center line of said outlet, a fixing ring body (212) connected to an outer circumference of the support ring body (211) and fixed to the top of the side wall (11) and connected to an inner circumference of the support ring body (211) for connecting an external portion A bending ring body (213) of the pipe, the heating element (22) being mounted on the support ring body (211).
The heat pump according to claim 2, wherein said heating element (22) comprises an annular heating tube (221) having a notch and a first end disposed at said both ends of said notch of said annular heating tube (221) An electrode (222) and a second electrode (223); the annular heating tube (221) includes a bottom surface in thermal conduction contact with the support ring body (211) and is connected to the bottom surface and along the support ring body (211) The side of the circumferential direction extending, the pump cover assembly (2) includes a thermally conductive plate (23) that thermally conductively connects the side to the support ring (211).
The heat pump according to claim 3, characterized in that said heat conducting plate (23) comprises a first ring body (231) and a second ring body (232) connected to the first ring body (231), wherein:

The first ring body (231) and the second ring body (232) are in surface contact with the side surfaces of the support ring body (211) and the annular heating tube (221), respectively; and/or

The first ring body (231) and the second ring body (232) are respectively connected to the side surfaces of the support ring body (211) and the annular heating tube (221) by welding.
The heat pump according to claim 4, wherein said pump cover assembly (2) comprises a thermostat (24) connected to said first electrode (222), said second ring body (232) comprising a main ring body (2321) having an opening and in contact with the annular heating tube (221) and a step portion (2322) at the opening, the two sides of the step portion (2322) in the circumferential direction respectively The two ends of the opening of the main ring body (2321) are spaced apart, the step portion (2322) includes a vertical portion spaced apart from the annular heating tube (221) and located at the annular heating tube (221) The upper horizontal portion, the thermostat (24) is mounted on the horizontal portion, the thermostat (24) includes a first temperature sensing surface, the first temperature sensing surface and the step portion (2322 )contact.
The heat pump according to claim 5, wherein said horizontal portion has a distance higher than said annular heating tube (221) by at least 1 mm; and/or said thermostat (24) and said first The minimum distance between an electrode (222) has an arc length on the annular heating tube (221) ranging from 5 to 15 mm.
Heat pump according to claim 5 or 6, characterized in that the pump cover assembly (2) comprises a fuse (25) connected to the second electrode (223), the fuse (25) comprising a second a temperature sensing surface, the second temperature sensing surface is in contact with the annular heating tube (221); the annular heating tube (221) includes a top surface and opposite ones connected between the top surface and the bottom surface The side surface has an area larger than an area of the top surface, and the fuse (25) is supported to be mounted on the top surface.
A heat pump according to claim 7, wherein said pump cover assembly (2) comprises an insulated socket (26), said thermostat (24), said fuse (25) and said insulated socket ( 26) is connected in series between the first electrode (222) and the second electrode (223).
The heat pump according to claim 8, wherein:

The pump cover assembly (2) includes a protective cover (27) on the top of the annular heating tube (221), the thermostat (24), the fuse (25) and the insulating socket (26); and / or,

The top of the side wall (11) is provided with a stepped flange (111) protruding outwardly, and the fixing ring body (212) is provided with a groove-shaped fold that can be engaged and fixed to the outside of the stepped flange (111). Edge (2121); the pump cover assembly (2) includes a step between the stepped flange (111) and the grooved flange (2121) to seal the side wall (11) and the support portion Sealing ring (28) of (21).
A washing appliance, characterized in that the washing appliance comprises a heat pump according to any one of claims 1-9.