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EP-4245998-B1 - BLADE-HEATING HEAT PUMP COVER AND HEAT PUMP

EP4245998B1EP 4245998 B1EP4245998 B1EP 4245998B1EP-4245998-B1

Inventors

  • ZHOU, ZAIXING

Dates

Publication Date
20260506
Application Date
20230303

Claims (15)

  1. A heat pump cover, comprising: a cover body (100), the cover body has a first surface (110) in contact with liquid and a second surface (120) opposed to the first surface (110), wherein the heat pump cover further comprises a heating element (400), the heating element (400) has a first end (410) on one side of the first surface (110), and a second end (430) passes through the cover body (100) and protrudes from the second surface (120), the second end (430) is provided with an electrical connection section, the electrical connection section is used for energizing; the first end (410) comprises a heating section (412) and a non-heating section (413), the non-heating section (413) is on one side of the heating section (412) away from the second end (430), and the non-heating section (413) is connected to the heating section (412), wherein the heating element (400) comprises a heating sheath (460) with a heating wire (470) bent back and forth within the heating sheath (460) and arranged such that the heating wire (470) forms a radial side-by-side structure.
  2. The heat pump cover according to claim 1, wherein a length of the non-heating section (413) is 2mm - 80mm.
  3. The heat pump cover according to claim 1, wherein the heating element (400) has a connection area (411), and the connection area (411) is fixedly connected to the first surface (110); the heat pump cover further comprises a temperature-controlling assembly (300), the temperature-controlling assembly (300) is electrically connected to the electrical connection section; the temperature-controlling assembly (300) comprises a safety device (320), the safety device (320) is connected to a position on the second surface (120) corresponding to the connection area.
  4. The heat pump cover according to claim 3, wherein the heating section (412) is the connection area (411), the heating section (412) is fixedly connected to the first surface (110).
  5. The heat pump cover according to claim 4, wherein the heating section (412) is welded to the first surface (110) or is fixedly connected to the first surface (110) by a temperature-sensing layer (450).
  6. The heat pump cover according to claim 1, wherein the non-heating section (413) is connected to the first surface (110) or is set at intervals with the first surface (110).
  7. The heat pump cover according to claim 1, wherein a length of the heating element (400) along a radial direction is greater than a length of the heating element (400) along an axial direction.
  8. The heat pump cover according to claim 7, wherein a ratio of the length of the heating element (400) along the radial direction to the length of the heating element (400) along the axial direction is not less than 2.3.
  9. The heat pump cover according to claim 1, wherein the heating element (400) has a heating body area (420), the heating body area (420) is provided between the first end (410) and the second end (430), the heating body area (420) and the first end (410) form a contour in a shape of an open ring; the heating element has a connecting reinforcement connected between a bending section (431) of the second end (430) and the first end (410), the connecting reinforcement is located at an opening between the heating body area (420) and the first end (410).
  10. The heat pump cover according to claim 3, wherein the electrical connection section comprises a first wiring post (440) and a second wiring post (441); the heating element (400) comprises the heating sheath (460) and the heating wire (470) inside the heating sheath (460), two ends of the heating wire (470) are respectively connected to the first wiring post (440) and the second wiring post (441).
  11. The heat pump cover according to claim 1, wherein the cover body (100) is provided with a convex section (200), the second end (430) comprises a bending section (431) and an extension section (432), the bending section (431) is bent into the convex section (200) and penetrates the convex section (200) by the extension section (432), the extension section (432) of the second end (430) is sealingly connected to a penetration of the convex section (200); a power density at the bending section (431) and a power density at a part of the extension section (432) inside the convex section (200) are both less than a power density at the heating section (412).
  12. The heat pump cover according to claim 3, wherein the heating element (400) has a heating body area (420), the heating body area (420) is provided between the first end (410) and the second end (430), the heating body area (420) of the heating element (400) and the first surface (110) are set at intervals, the heating body area (420) and the first surface (110) are connected by one support (421) or a plurality of supports; a position of the heating body area (420) connected to the supports (421) is the connection area (411).
  13. The heat pump cover according to claim 3, wherein the heating body area (420) of the heating element (400) and the first surface (110) are set at intervals, at least one welded position is between the heating body area (420) and the first surface (110), the welded position of the heating body area (420) is the connection area (411).
  14. The heat pump cover according to claim 10, wherein the temperature-controlling assembly (300) further comprises a temperature-sensing substrate, the temperature-sensing substrate is connected to the second surface (120); a temperature controller (310), the temperature controller (310) is connected to the temperature-sensing substrate, and a bottom of the temperature controller (310) is attached to the second surface (120); a safety device (320), the safety device (320) is connected to the temperature-sensing substrate, and a bottom of the safety device (320) is attached to the second surface (120); and a control plug (340), the control plug (340) is fixedly set on the temperature controller (310) and the safety device (320), two sides of the control plug (340) are respectively provided with reinforcement bars, the first wiring post (440) and the second wiring post (441) are respectively electrically connected to a first plug (350) and a second plug (351) set on the two sides of the control plug (340) in a circuit connection; the control (340) plug also comprises a third plug (352) and a fourth plug (353), the third plug (352) and the fourth plug (353) are set at intervals, the third plug (352) and the fourth plug (353) are respectively electrically connected to the temperature controller (310) and the safety device (320).
  15. A heat pump, wherein comprising: a pump body, and a heat pump cover according to any one of claims 1-14; the heat pump cover is detachably connected to the pump body.

Description

TECHNICAL FIELD The disclosure relates to the technical field of heat pump equipment, in particular to a heat pump cover and a heat pump. BACKGROUND In the prior art, heat pump is commonly used in household appliance, such as dishwasher, and the heat pump is an important part of the dishwasher. In the current heat pump, a heating element is adopted to be connected to a pump cover, the pump cover is engaged with a pump body to form a water chamber, when the heating element is electrically heating, the water flow through the water chamber is heated and then released. At present, heating tubes of heat pumps on the market are tubular heaters, but the water resistance is high when using the tubular heaters. In addition, in order to reduce the power density, the heating tube is designed as a double-loop and spiral structure, and the structure is multi-loop superimposed in the axial direction. This form of heater reduces the power density, but increases the length in the axial direction of a pump, so the form of heater is not conducive to be applied to a compact pump for dishwasher. US 2019/0162204 A1 discloses a cover for a centrifugal pump which comprises a heating element, which has a heating stretch and two end stretches connected to the heating stretch. The heating element crosses the cover so that the heating stretch is under the cover and the two end stretches are over the cover. At least one safety device, sensitive to the temperature of the electric resistor, fixed to the outer face, is provided and at least one control device, sensitive to both the temperature of the liquid and the temperature of the electric resistor, fixed to the outer face, is provided. At least one first portion of the heating stretch is in contact with the cover, so that the heating stretch is adapted to be in contact with the liquid. Therefore, the existing technology still needs to be developed. BRIEF SUMMARY The present disclosure aims to provide a heat pump cover and a heat pump, to solve the technical problem that the heating tube of the prior art is designed as a double-loop and spiral structure, and the structure increases the length in the axial direction, which is unfavorable to be applied to the compact pumps for dishwashers. To realize the aim above, the technical solution of the present disclosure is as follows: On the one hand, the present disclosure provides a heat pump cover, which comprises: a cover body, the cover body has a first surface in contact with liquid and a second surface opposed to the first surface, the heat pump cover further comprises a heating element, the heating element has a first end on one side of the first surface, and a second end passes through the cover body and protrudes from the second surface, the second end is provided with an electrical connection section, the electrical connection section is used for energizing;The first end comprises a heating section and a non-heating section, the non-heating section is on one side of the heating section away from the second end, and the non-heating section is connected to the heating section. In one embodiment, a length of the non-heating section is 2mm - 80mm. In one embodiment, the heating element has a connection area, and the connection area is fixedly connected to the first surface; The heat pump cover further comprises a temperature-controlling assembly, the temperature-controlling assembly is electrically connected to the electrical connection section;The temperature-controlling assembly comprises a safety device, the safety device is connected to a position on the second surface corresponding to the connection area. In one embodiment, the heating section is the connection area, the heating section is fixedly connected to the first surface. In one embodiment, the heating section is welded to the first surface or is fixedly connected to the first surface by a temperature-sensing layer. In one embodiment, the non-heating section is connected to the first surface or is set at intervals with the first surface. In one embodiment, a length of the heating element along a radial direction is greater than a length of the heating element along an axial direction. In one embodiment, a ratio of the length of the heating element along the radial direction to the length of the heating element along the axial direction is not less than 2.3. In one embodiment, the heating element has a heating body area, the heating body area is provided between the first end and the second end, the heating body area and the first end form a contour in a shape of an open ring; The heating element has a connecting reinforcement connected between a bending section of the second end and the first end, the connecting reinforcement is located at an opening between the heating body area and the first end. In one embodiment, the electrical connection section comprises a first wiring post and a second wiring post; The heating element comprises a heating sheath, and a heating wire ins