Heating pump and dish washing machine

Abstract

The invention discloses a heating pump and a dish-washing machine, and relates to the technical field of dish-washing machines, the heating pump comprises a pump shell, a motor, an impeller and a heater, the pump shell is provided with a water inlet and a water outlet; the impeller is arranged in the pump shell; the motor is in transmission connection with the impeller; the heater is attached to the outer wall of the pump shell; the pump shell comprises a shell body and heat conduction vortex edges, and the heat conduction vortex edges are connected to the inner wall of the shell body. The heat conduction vortex edges are used for exchanging heat with water entering the shell from the water inlet. According to the technical scheme, the heat exchange efficiency of the heating pump is improved.

Description

Technical Field

[0001] This invention relates to the field of dishwasher technology, and in particular to a dishwasher employing a heat pump. Background Technology

[0002] Energy efficiency ratings for dishwashers are now mandatory in China, and with the European ERP energy efficiency upgrade, improving the heating efficiency of dishwashers is attracting increasing attention. To achieve better heat exchange, some dishwasher heat pumps have developed cast aluminum shell heaters. However, many solutions on the market have not yet fully utilized the heat exchange advantages of cast aluminum shell heaters, and their heat exchange efficiency can be further improved.

[0003] Therefore, this application designs a heating pump with a high heat exchange rate to further improve heat exchange efficiency. Summary of the Invention

[0004] The main objective of this invention is to provide a heating pump that further improves heat exchange efficiency.

[0005] To achieve the above objectives, the present invention provides a heating pump, comprising:

[0006] A pump casing having an inlet and an outlet;

[0007] An impeller is disposed inside the pump casing;

[0008] An electric motor, which is connected to the impeller via a transmission.

[0009] A heater, wherein the heater is attached to the outer wall of the pump casing;

[0010] The pump casing includes a housing and a heat-conducting vortex, the heat-conducting vortex being connected to the inner wall of the housing; the heat-conducting vortex is used to exchange heat with the water entering the housing from the inlet.

[0011] In one embodiment, the housing includes a fixed plate and a cylindrical body with an opening, the fixed plate being used to close the opening; the heat-conducting vortex is integrally disposed on the inner wall of the cylindrical body.

[0012] In one embodiment, the cylinder and the heat-conducting vortex are made of cast aluminum, and the cylinder and the heat-conducting vortex are integrally formed die-cast parts; the heater includes a heat transfer plate and a heating tube, the heating tube is embedded in the heat transfer plate, the heat transfer plate is made of cast aluminum, and the heat transfer plate and the heating tube are integrally die-cast.

[0013] In one embodiment, the heat-conducting vortex includes a plurality of spaced-apart heat-conducting fins that extend from the end face of the cylinder into the interior of the cylinder.

[0014] In one embodiment, the heat-conducting fins are C-shaped; the notches in the heat-conducting fins correspond to the water outlet.

[0015] In one embodiment, the length of the heat-conducting fins extending into the cylinder gradually decreases from away from the notch to near the notch, and / or the notch location of the heat-conducting fins has a chamfer.

[0016] In one embodiment, the heating pump further includes a temperature controller mounted on the heat transfer plate and electrically connected to the heating tube.

[0017] In one embodiment, the heating tube includes a bent portion and two protruding portions, the two protruding portions being respectively disposed at both ends of the bent portion; the bent portion is embedded in the heat transfer plate; the protruding portions extend from the heat transfer plate and are connected to the thermostat.

[0018] In one embodiment, the number of bends in the curved portion is between 1 and 2.

[0019] In one embodiment, the pump casing further includes an inlet pipe and an outlet pipe; the inlet pipe is connected to the end wall of the cylinder; the outlet pipe is connected to the side wall of the cylinder; the inlet is disposed on the inlet pipe, and the outlet is disposed on the outlet pipe.

[0020] In one embodiment, the heat transfer plate is annular in shape, the heat transfer plate is sleeved on the water inlet pipe, and a heat-conducting material is provided between the heat transfer plate and the end wall of the cylinder.

[0021] In one embodiment, the outer wall of the water inlet pipe has a positioning protrusion, and the heat transfer plate has a positioning groove that matches the positioning protrusion.

[0022] The present invention also proposes a dishwasher including the aforementioned heating pump.

[0023] The heating pump of the present invention has a heat-conducting vortex inside the pump casing, which increases the contact area with water and improves the heat exchange rate. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1A schematic diagram of the structure of an embodiment of the heating pump provided by the present invention from one perspective;

[0026] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the heating pump provided by the present invention;

[0027] Figure 3 A schematic diagram of the structure of an embodiment of the heating pump provided by the present invention from another perspective;

[0028] Figure 4 A schematic cross-sectional view of the heater location in an embodiment of the heating pump provided by the present invention;

[0029] Figure 5 A schematic diagram of the cylinder of an embodiment of the heating pump provided by the present invention from one perspective;

[0030] Figure 6 A schematic diagram of the cylinder of a heating pump embodiment provided by the present invention from another perspective;

[0031] Figure 7 This is a schematic diagram of the heater in an embodiment of the heating pump provided by the present invention;

[0032] Figure 8 This is a schematic diagram of the heating tube structure of an embodiment of the heating pump provided by the present invention.

[0033] Explanation of icon numbers:

[0034] 100. Heat pump; 1. Pump casing; 11. Inlet; 12. Outlet; 13. Shell; 131. Fixing plate; 132. Cylinder; 14. Heat-conducting vortex; 141. Heat-conducting fins; 142. Notch; 15. Inlet pipe; 151. Positioning protrusion; 16. Outlet pipe; 2. Motor; 3. Impeller; 4. Heater; 41. Heat transfer plate; 411. Positioning groove; 42. Heating tube; 421. Bend; 422. Extension; 5. Thermostat. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0038] With increasing market focus on dishwasher energy efficiency, heating efficiency has become a major concern. To achieve better heat exchange, some dishwasher heat pumps have developed cast aluminum shell heaters. While these heaters improve heat exchange efficiency, they haven't fully realized the advantages of cast aluminum heaters, and their efficiency can be further enhanced. Therefore, this application designs a heating pump with a high heat exchange rate.

[0039] Please refer to Figures 1 to 4 As shown, an embodiment of this application provides a heating pump 100, including a pump casing 1, a motor 2, an impeller 3, and a heater 4. The pump casing 1 has an inlet 11 and an outlet 12. The motor 2 is disposed at the bottom of the pump casing 1, and the heater 4 is disposed at the top of the pump casing 1. The impeller 3 is disposed inside the pump casing 1, and the motor 2 is drivenly connected to the impeller 3. The heater 4 is attached to the outer wall of the pump casing 1. The pump casing 1 includes a housing 13 and a heat-conducting vortex 14, which is disposed on the inner wall of the housing 13 and is used for heat exchange with water entering the housing 13 from the inlet 11.

[0040] Specifically, the heating pump 100 includes a heater 4, a pump casing 1, and a motor 2 arranged sequentially from top to bottom. The heater 4 is located above the pump casing 1, and the motor 2 is located below the pump casing 1. An impeller 3 is also installed inside the pump casing 1. The impeller 3 is connected to the motor 2 via a drive mechanism. The rotation of the motor 2 drives the impeller 3 inside the pump casing 1 to rotate, which in turn drives the water inside the pump casing 1 to rotate. The pump casing 1 has an inlet 11 and an outlet 12. The inlet 11 allows external water to enter the space inside the pump casing, and the outlet 12 allows water inside the pump casing 1 to flow out to the outside. The heater 4 is attached to the outer wall of the pump casing 1. The heater 4 generates heat, which is first transferred to the outer wall of the pump casing 1, and then to the inside of the pump casing 1. The pump casing 1 includes a housing 13 and a heat-conducting vortex 14. The heat-conducting vortex 14 is located on the inner wall of the housing 13. The heater 4 is attached to the housing 13, and the heat from the heater 4 is transferred to the housing 13, and then to the heat-conducting vortex 14. Driven by the impeller 3, the water inside the shell 13 rotates within the shell 13. As the water rotates inside the shell 13, it comes into contact with the inner surface of the shell 13 and the heat-conducting vortex 14 inside the shell 13. The heat-conducting vortex 14 can increase the contact area with the water, thereby improving the heat exchange efficiency.

[0041] In an optional embodiment, the housing 13 includes a fixing plate 131 and a cylindrical body 132 with an opening. The fixing plate 131 is installed at the opening of the cylindrical body 132 to close the opening. A heat-conducting vortex 14 is integrally formed on the inner wall of the cylindrical body 132. The cylindrical body 132 and the heat-conducting vortex 14 are made of cast aluminum and are integrally die-cast parts. The heater 4 includes a heat transfer plate 41 and a heating tube 42. The heating tube 42 is embedded in the heat transfer plate 41, and the heat transfer plate 41 and the heating tube 42 are integrally die-cast. The heat transfer plate 41 is made of cast aluminum.

[0042] Specifically, the housing 13 includes a fixing plate 131 and a cylindrical body 132. The cylindrical body 132 has an opening, and the fixing plate 131 is installed at the opening to close it. The opening of the cylindrical body 132 faces downward, and the end wall of the cylindrical body 132 (i.e., the bottom wall of the cylindrical body 132 opposite the opening) faces upward. The motor 2 is installed below the fixing plate 131. The heater 4 is located at the top of the cylindrical body 132, i.e., the heater 4 is located outside the end wall of the cylindrical body 132, and the heat transfer plate 41 of the heater 4 is in contact with the end wall of the cylindrical body 132. The space formed by the cylindrical body 132 and the fixing plate 131 is used to contain water, and heat exchange occurs between the water and the cylindrical body 132 to heat the cold water entering the cylindrical body 132. A heat-conducting vortex 14 is disposed inside the cylinder 132 and on the inner side of the end wall of the cylinder 132. The heat-conducting vortex 14 corresponds to the impeller 3. When the impeller 3 rotates, it drives the water inside the cylinder 132 to rotate, thereby making the water inside the cylinder 132 contact the heat-conducting vortex 14 and the inner wall of the cylinder 132 for heat exchange. In this embodiment, both the cylinder 132 and the heat-conducting vortex 14 are made of cast aluminum. Cast aluminum has a high thermal conductivity, which is beneficial to improving heat transfer efficiency. The cylinder 132 and the heat-conducting vortex 14 are integrally formed die-cast parts. The heater 4 includes an integrally disposed heat transfer plate 41 and a heating tube 42, with a portion of the heating tube 42 embedded in the heat transfer plate 41. The heat transfer plate 41 is also made of cast aluminum, which facilitates heat transfer. The heating tube 42 and the heat transfer plate 41 can be manufactured by integral die casting. During manufacturing, the heating tube 42 is first placed in the mold, and then the cast aluminum material is added to the mold, so that the heating tube 42 can be integrally embedded into the heat transfer plate 41. The specific manufacturing process is already very mature and will not be described in detail here.

[0043] In this embodiment, during installation, the motor 2 is first assembled as a whole or a pre-purchased finished motor 2 is directly installed. The motor 2 includes a housing, stator, magnetic ring, drive shaft, bearings, etc. The motor 2 is existing technology and will not be described in detail here. Then, the drive shaft of the motor 2 is passed through the fixing plate 131, and the impeller 3 is installed on the upper end of the fixing plate 131. Finally, the fixing plate 131 and the motor 2 are fixed together at the opening of the cylinder 132 to fix the impeller 3 inside the cylinder 132 and to close the opening of the cylinder 132.

[0044] During operation, after the heating tube 42 is energized, it generates a large amount of heat. This heat is first transferred to the heat transfer plate 41, which is attached to the end wall of the cylinder 132. The heat transfer plate 41 then transfers the heat to the end wall of the cylinder 132, which subsequently transfers the heat to other parts of the cylinder 132 and to the heat-conducting vortex 14 inside the cylinder 132. Cold water from the outside enters the cylinder 132 through the inlet 11 and rotates inside the cylinder 132 under the action of the impeller 3. As the cold water rotates inside the cylinder 132, it comes into full contact with the heat-conducting vortex 14 and the inner wall of the cylinder 132, exchanging heat and heating the water inside the cylinder 132. The heat-conducting vortex 14 increases the area for heat exchange between the cylinder 132 and the water, improving the heat exchange efficiency. This application uses a heater 4 made of cast aluminum, which improves heating efficiency. It also uses a cylinder 132 made of cast aluminum, resulting in high efficiency in heat transfer from the heater 4 to the cylinder 132. Finally, the heat transfer is further enhanced by the heat-conducting vortex 14, which increases the contact area with water, thus significantly increasing the heat exchange rate. Therefore, the solution in this application can improve the heat exchange efficiency of the heating pump 100. In the market, the heating element is placed inside the pump casing. With this structure, if the heating element fails during use, the pump casing needs to be replaced, increasing maintenance costs and making subsequent maintenance inconvenient. Furthermore, commercially available pump casings do not have the heat-conducting vortex 14 inside. This application uses a modular heater 4, which includes an integrally die-cast heat transfer plate 41 and a heating tube 42. In addition, the heater 4 and the pump casing 1 are two independent structures. If the heater 4 fails, it can be directly maintained or replaced, simplifying maintenance and reducing costs. Simultaneously, the presence of the heat-conducting vortex 14 significantly improves the heat exchange efficiency.

[0045] Please refer to Figure 5 and Figure 6 As shown, the pump casing 1 also includes an inlet pipe 15 and an outlet pipe 16. The inlet pipe 15 is connected to the end wall of the cylinder 132, and the outlet pipe 16 is connected to the side wall of the cylinder 132. The inlet 11 is provided on the inlet pipe 15, and the outlet 12 is provided on the outlet pipe 16.

[0046] Specifically, the cylinder 132, inlet pipe 15, outlet pipe 16, and heat-conducting vortex 14 are integrally formed. The inlet pipe 15 is located in the middle of the end wall of the cylinder 132, extending outward from the end wall to protrude from it. One end of the outlet pipe 16 is connected to the side wall of the cylinder 132, and the other end extends outward. The inlet 11 is located on the inlet pipe 15, and the outlet 12 is located on the outlet pipe 16. The inlet 11, the internal space of the cylinder 132, and the outlet 12 are connected. During operation, cold water first enters the cylinder 132 through the inlet 11, exchanges heat with the inner wall of the cylinder 132 and the heat-conducting vortex 14, and then is discharged to the outside through the outlet 12.

[0047] Please refer to Figure 7 As shown, in this embodiment, the heat transfer plate 41 is annular in shape and is fitted onto the water inlet pipe 15. A heat-conducting material is provided between the heat transfer plate 41 and the end wall of the cylinder 132. The heat transfer plate 41 and the heating pipe 42 are die-cast together, allowing the heat from the heating pipe 42 to be more effectively transferred to the large-area heat transfer plate 41, and then transferred to other locations via the heat transfer plate 41. The heat transfer plate 41 and the end wall of the cylinder 132 can be fixed together with screws. Mounting holes (not shown in the figure) are provided on the end wall of the cylinder 132, and mounting holes (not shown in the figure) are provided on the heat transfer plate 41 at positions corresponding to the positioning holes. Screws are passed through the heat transfer plate 41 and the cylinder 132 to fix them together. This application manufactures the pump housing 1 and the heater 4 separately, and then connects them with screws and heat-conducting material, facilitating modular production, standardization, and making after-sales maintenance and replacement more convenient. Understandably, the heat-conducting material between the heat transfer plate 41 and the cylinder 132 can be selected according to actual needs, such as thermally conductive adhesive, and the specific material and thermal conductivity of the heat-conducting material are not limited here.

[0048] In some optional embodiments, the outer wall of the water inlet pipe 15 has a positioning protrusion 151, and the center of the heat transfer plate 41 has a positioning groove 411 that matches the positioning protrusion 151. During assembly, the positioning groove 411 of the heat transfer plate 41 is first aligned with the positioning protrusion 151 on the water inlet pipe 15, and then the heat transfer plate 41 is fitted onto the water inlet pipe 15. The positioning groove 411 and the positioning protrusion 151 facilitate assembly and prevent mistaken assembly.

[0049] Please refer to Figure 6 As shown, the heat-conducting vortex 14 includes a plurality of spaced heat-conducting fins 141, which extend from the end wall of the cylinder 132 toward the interior of the cylinder 132. The water inlet pipe 15 is connected to the end wall of the cylinder 132, and the heat-conducting fins 141 extend from the end wall of the cylinder 132 toward its interior so that the cold water entering from the water inlet 11 can fully contact the heat-conducting fins 141, thereby improving the heat exchange efficiency.

[0050] In an optional embodiment, the heat-conducting fins 141 are C-shaped and coaxially arranged with the impeller 3. The notches 142 of the heat-conducting fins 141 are located near the outlet 12. Specifically, there are multiple heat-conducting fins 141, and the multiple C-shaped heat-conducting fins 141 are evenly spaced around the axis of the impeller 3. When the impeller 3 rotates inside the cylinder 132, it drives the water inside the cylinder 132 to rotate. Setting the heat-conducting fins 141 as C-shaped facilitates the impeller 3 to drive the water to rotate inside, reducing the resistance when the water rotates inside the cylinder 132. The notches 142 of the heat-conducting fins 141 are designed not to affect the hydraulic performance, so that the heated water can smoothly pass through the notches 142 and then be sent to the outside from the outlet 12. In this embodiment, the heat-conducting fin 141 has a C-shaped structure of approximately 270 degrees, and the size of the notch 142 is larger than the size of the outlet 12 to prevent the heat-conducting fin 141 from obstructing the heated water. In some embodiments, the height of the heat-conducting fin 141 gradually decreases from away from the outlet 12 to near the outlet 12. This structure can reduce the impact of the heat-conducting fin 141 on hydraulic performance. The notch 142 of the heat-conducting fin 141 has a chamfer, which is also to facilitate the smooth delivery of water from inside the cylinder 132.

[0051] It should be noted that the shape of the heat-conducting fins 141 can also be strip-shaped, L-shaped, or other irregular shapes. An L-shape consists of two strip-shaped walls connected at an angle. All of these shapes of heat-conducting fins 141 can increase the contact area with water, thereby improving the heat transfer rate. The shape and size of the heat-conducting fins 141 are set according to actual needs and are not limited here.

[0052] Please refer to Figure 1 and Figure 8 As shown, the heating pump 100 also includes a thermostat 5, which is mounted on the heater 4 and electrically connected to the heating tube 42. The heating tube 42 includes a bent portion 421 and two protruding portions 422, which are respectively disposed at both ends of the bent portion 421. The bent portion 421 is embedded in the heat transfer plate 41, and the protruding portions 422 extend out of the heat transfer plate 41 and are connected to the thermostat 5.

[0053] Specifically, the heating pump 100 also includes a thermostat 5 mounted on the heater 4. The thermostat 5 is electrically connected to the heating tube 42 and controls the heating temperature of the heating tube 42. The thermostat 5 is located at the end of the heat transfer plate 41 of the heater 4 away from the pump housing 1. The heating tube 42 includes a bent portion 421 and two protrusions 422. The two protrusions 422 are respectively located at both ends of the bent portion 421. The protrusions 422 extend from the end of the heat transfer plate 41 away from the pump housing 1 and are connected to the thermostat 5. In this application, the heating tube 42 and the heat transfer plate 41 are integrally die-cast to embed the bent portion 421 of the heating tube 42 into the interior of the heat transfer plate 41, thereby bringing the molecular distance between the heating tube 42 and the heat transfer plate 41 closer and improving the efficiency of heat transfer between the heating tube 42 and the heat transfer plate 41. The portion of the heating tubes 42 embedded inside the heat transfer plate 41 is configured as a curved shape, so that the heating tubes 42 in the curved portion 421 can be distributed on the heat transfer plate 41, thereby increasing the contact area between the heating tubes 42 and the heat transfer plate 41 and improving the efficiency of heat transfer between the heating tubes 42 and the heat transfer plate 41.

[0054] like Figure 8 As shown, in this embodiment, the number of bends in the curved portion 421 is between one and two. That is, a portion of the curved portion 421 has two bends, and another portion has one bend. The heat-conducting vortex 14 corresponds to the portion of the two bends of the heating tube 42, and the notch 142 corresponds to the portion of the one bend of the heating tube 42. This allows the heat from the heating tube 42 to be fully transferred to the liquid to be heated through the heat-conducting vortex 14. It should be noted that the number of bends in the curved portion 421 can be more. The specific number of bends is set according to parameters such as the diameter of the heating tube 42 and the size of the heat transfer plate 41, and is not limited here.

[0055] Understandably, the curved portion 421 can also adopt other shapes, such as wavy or other irregular shapes, as long as it can increase the contact area between the heating tube 42 embedded in the heat transfer plate 41 and the heat transfer plate 41.

[0056] This application also relates to a dishwasher, which includes the aforementioned heat pump 100. The heat pump 100 includes a pump housing 1, a motor 2, an impeller 3, and a heater 4. The heater 4 includes a heat transfer plate 41 and a heating tube 42, the heating tube 42 being integrally die-cast within the heat transfer plate 41. The pump housing 1 includes an integrally formed cylinder 132 and a heat-conducting vortex 14, the heat-conducting vortex 14 being disposed on the inner side of the end wall of the cylinder 132, and the heat transfer plate 41 being attached to the outer side of the end wall of the cylinder 132. The heat-conducting vortex 14 is used to exchange heat with water entering from the outside, thereby heating the incoming water. The pump housing 1 has an inlet 11 and an outlet 12. The heater 4 is disposed above the pump housing 1, the motor 2 is disposed below the pump housing 1, and the impeller 3 is disposed inside the pump housing 1, with the motor 2 and impeller 3 being drively connected. The heater 4 of this application adopts an integral die-cast heat transfer plate 41 and heating tube 42 to form a modular heater 4. The heat transfer plate 41 is made of cast aluminum, and the heating tube 42 has high efficiency in transferring heat to the heat transfer plate 41. Furthermore, a heat-conducting vortex 14 is integrally formed on the cylinder 132 of the pump housing 1, which further increases the contact area with cold water, thereby improving the efficiency of heat exchange.

[0057] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A heat pump, characterized by include: A pump casing having an inlet and an outlet; An impeller is disposed inside the pump casing; An electric motor, which is connected to the impeller via a transmission. A heater, wherein the heater is attached to the outer wall of the pump casing; The pump casing includes a housing and a heat-conducting vortex, the heat-conducting vortex being connected to the inner wall of the housing; the heat-conducting vortex is used to exchange heat with the water entering the housing from the inlet.

2. The heat pump of claim 1, wherein, The housing includes a fixed plate and a cylindrical body with an opening, the fixed plate being used to close the opening; the heat-conducting vortex is integrally disposed on the inner wall of the cylindrical body.

3. The heat pump of claim 2, wherein, The cylinder and the heat-conducting vortex are made of cast aluminum, and the cylinder and the heat-conducting vortex are integrally formed die-cast parts; the heater includes a heat transfer plate and a heating tube, the heating tube is embedded in the heat transfer plate, the heat transfer plate is made of cast aluminum, and the heat transfer plate and the heating tube are integrally die-cast.

4. The heat pump of claim 3 wherein, The heat-conducting vortex includes a plurality of spaced heat-conducting fins that extend from the end face of the cylinder into the interior of the cylinder.

5. The heat pump as set forth in claim 4, wherein The heat-conducting fins are C-shaped; the notches on the heat-conducting fins correspond to the water outlet.

6. The heat pump as set forth in claim 5, wherein The length of the heat-conducting fins extending into the cylinder gradually decreases from the direction away from the notch to the direction closer to the notch; and / or the notch of the heat-conducting fins has a chamfer.

7. The heat pump as set forth in claim 3, wherein The heating pump also includes a temperature controller, which is mounted on the heat transfer plate and electrically connected to the heating tube.

8. The heat pump of claim 7 wherein, The heating tube includes a curved portion and two protruding portions, with the two protruding portions respectively located at the two ends of the curved portion; the curved portion is embedded in the heat transfer plate; the protruding portions extend from the heat transfer plate and are connected to the temperature controller.

9. The heat pump as set forth in claim 8, wherein, The number of bends in the curved section is between 1 and 2.

10. The heat pump as set forth in claim 3, wherein The pump casing also includes an inlet pipe and an outlet pipe; the inlet pipe is connected to the end wall of the cylinder; the outlet pipe is connected to the side wall of the cylinder; the inlet is located on the inlet pipe, and the outlet is located on the outlet pipe.

11. The heat pump as set forth in claim 10, wherein, The heat transfer plate is annular in shape and is sleeved on the water inlet pipe. A heat-conducting material is provided between the heat transfer plate and the end wall of the cylinder.

12. The heat pump as set forth in claim 10, wherein, The outer wall of the water inlet pipe has a positioning protrusion, and the heat transfer plate has a positioning groove that matches the positioning protrusion.

13. A dishwasher, characterized in that Including the heating pump as described in any one of claims 1 to 12.

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