Heating pump and dish washing machine

Abstract

The utility model discloses a heating pump and a dish-washing machine, and relates to the technical field of household equipment, the heating pump comprises a heating pump body, a motor, an impeller assembly and a heating pipe, the pump body is provided with a pump cavity, a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the pump cavity; the motor is connected to the pump body, and a rotating shaft of the motor penetrates into the pump body; the impeller assembly is arranged in the pump body and installed on the rotating shaft. The heating pipe is fixedly installed on the pump body, the heating pipe comprises a curve section and two straight line sections connected to the two ends of the curve section respectively, the curve section is located below the impeller assembly, and the two straight line sections both extend upwards and extend out of the pump body; the fuse is installed in any one of the straight line segments. According to the technical scheme, the length of the heating pump is reduced, and the adaptability of the heating pump in the dish washing machine is improved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a heat pump and a dishwasher including the heat pump. Background Technology

[0002] The dishwasher's heat pump has two functions: heating and pumping water. Commonly used heat pumps in this field have relatively long heating elements, resulting in a long heat pump itself. This affects the arrangement of other dishwasher components and severely impacts the versatility of the heat pump's installation.

[0003] Therefore, a new heating pump structure needs to be designed to reduce the length of the heating pump and improve its versatility. Utility Model Content

[0004] The main objective of this invention is to propose a heat pump and dishwasher that aims to reduce the length of the heat pump and improve its versatility.

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

[0006] The pump body has a pump chamber and an inlet and an outlet communicating with the pump chamber;

[0007] An electric motor is connected to the pump body, and the motor shaft passes through the pump body;

[0008] An impeller assembly is disposed within the pump body and mounted on the rotating shaft;

[0009] A heating element is fixedly installed on the pump body. The heating element includes a curved section and two straight sections connected to both ends of the curved section. The curved section is located below the impeller assembly, and the two straight sections extend upward and out of the pump body.

[0010] A fuse, wherein the fuse is installed within any of the said straight segments.

[0011] In one embodiment, the curved segment includes an arc segment and connecting segments disposed at both ends of the arc segment. The connecting segments extend from the end of the arc segment toward the lower end of the straight segment, and the two connecting segments are close to each other in the direction of extension toward the straight segment.

[0012] In one embodiment, the connecting segment extends to the outside of the circle containing the arc segment.

[0013] In one embodiment, the pump body has a circumferential sidewall that protrudes outward from one side corresponding to the two straight segments to form a protruding wall, and the distance between the protruding wall and the straight segment is in the range of 5mm-7mm.

[0014] In one embodiment, the fuse is located in the upper half of the pump chamber.

[0015] In one embodiment, the upper end of the pump body protrudes outward to form a protrusion; the straight segment extends through the protrusion; the heating pump further includes a fixing member for fixing the straight segment extending through the protrusion.

[0016] In one embodiment, the protrusion has two second mounting holes for a straight section of the heating tube to pass through.

[0017] In one embodiment, the circumferential side has a first mounting hole for mounting a metal bottom cover, the metal bottom cover being inserted into the first mounting hole; a thermostat is disposed outside the metal bottom cover, the thermostat, the heating element and the fuse being electrically connected in series.

[0018] In one embodiment, the first mounting hole is located in the upper half of the circumferential side surface.

[0019] In one embodiment, the impeller assembly includes an impeller seat, blades mounted on the impeller seat, and an impeller cover disposed above the impeller seat; a portion of the blades extends out of the impeller seat.

[0020] This utility model also proposes a dishwasher, including the aforementioned heating pump.

[0021] The technical solution of this utility model optimizes the spatial layout by placing the curved section of the heating tube below the impeller, while ensuring the heating function and shortening the length of the heating pump, making it easier to install and use in a dishwasher. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of an embodiment of the heating pump provided by this utility model;

[0024] Figure 2 This is an exploded structural diagram of an embodiment of the heating pump provided by this utility model;

[0025] Figure 3 A cross-sectional structural schematic diagram of an embodiment of the heating pump provided by this utility model;

[0026] Figure 4 A schematic diagram of the heating tube from one perspective of an embodiment of the heating pump provided by this utility model;

[0027] Figure 5 A schematic diagram of the heating tube from another perspective of an embodiment of the heating pump provided by this utility model;

[0028] Figure 6 Another cross-sectional structural schematic diagram of an embodiment of the heating pump provided by this utility model

[0029] Figure 7 A schematic diagram of the upper pump housing of an embodiment of the heating pump provided by this utility model;

[0030] Figure 8 An exploded view of the impeller of an embodiment of the heating pump provided by this utility model.

[0031] Explanation of icon numbers:

[0032] 10. Pump body; 10a. Pump chamber; 10b. Inlet; 10c. Outlet; 11. Protruding wall; 12. Protruding platform; 13. Upper pump casing; 14. Lower pump casing; 15. Second mounting hole; 16. First mounting hole; 20. Motor; 30. Impeller assembly; 31. Impeller seat; 32. Blade; 33. Impeller cover; 40. Heating tube; 41. Curved section; 411. Circular arc section; 412. Connecting section; 42. Straight section; 50. Fuse; 60. Metal bottom cover; 70. Thermostat; 80. Fixing component.

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0035] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators 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 indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this utility model 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. Therefore, 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 utility model.

[0037] The heating tubes in commonly used heat pumps in this field are quite long, resulting in a long heat pump. In the limited internal space of a dishwasher, an excessively long heat pump will conflict with the spatial layout of other components, severely limiting the rational arrangement of other components and reducing the efficiency of internal space utilization in the dishwasher.

[0038] This invention proposes a heating pump for use in a dishwasher to provide hot water.

[0039] Please see Figures 1 to 4As shown, in one embodiment of this utility model, the heat pump includes a pump body 10, a motor 20, an impeller assembly 30, and a heating tube 40. The pump body 10 is the basic structure of the entire heat pump. It forms a pump chamber 10a internally and has an inlet 10b and an outlet 10c communicating with the pump chamber 10a, providing space for liquid flow. Fluid is introduced through the inlet 10b, processed by the pump chamber 10a, and then discharged from the outlet 10c. Simultaneously, the pump body 10 serves as a mounting carrier for other components, providing mounting support for the motor 20, impeller assembly 30, heating tube 40, etc. The motor 20 is connected to the pump body 10, and the motor 20's shaft passes through the pump body 10. The motor 20 acts as a power source, providing rotational power to the impeller assembly 30 through the rotation of its shaft. The impeller assembly 30 is disposed inside the pump body 10 and mounted on the motor 20's shaft. Driven by the shaft of motor 20, the pump rotates, using centrifugal force or other principles to energize the liquid entering the pump chamber 10a, thereby achieving liquid transport. A heating element 40 is fixedly installed on the pump body 10. The heating element 40 consists of a curved section 41 and two straight sections 42 connected to the two ends of the curved section 41. The curved section 41 is located below the impeller assembly 30, and both straight sections 42 extend upwards and out of the pump body 10. This heats the liquid in the pump chamber 10a, raising its temperature to meet the dishwasher's operating requirements. A fuse 50 is installed in any of the straight sections 42 of the heating element 40 and is connected to the heating element 40's circuit system, monitoring the current in the circuit in real time. When an overload, short circuit, or other abnormal condition occurs in the circuit, causing the current to exceed the rated current of the fuse 50, the fuse 50 will quickly melt, cutting off the circuit and preventing damage to the heating element 40 and other components due to excessive current, thus protecting the safe operation of the heating pump.

[0040] This application optimizes the spatial layout by placing the curved segment 41 of the heating element 40 below the impeller, ensuring heating functionality while shortening the length of the heat pump, making it easier to install and use in dishwashers. Traditional heat pumps occupy a significant amount of vertical space with their heating element 40. In this solution, the arc segment 411 of the heating element 40 is placed below the impeller, allowing the entire heating element 40 to move towards the lower part of the pump body 10. Since part of the heating element 40 no longer occupies excessive upward space but instead makes efficient use of the space below the impeller, the vertical (height) dimensions of the heat pump are effectively reduced, shortening its length. This solves the problem of excessively long heat pumps on the market, improving the product's applicability and space utilization in dishwashers.

[0041] It should be noted that in this embodiment, the heating tube 40 contains a heating wire and a filler. When energized, the heating wire generates heat to heat the fluid flowing through the pump chamber 10a. The filler fills the remaining space inside the heating tube 40, serving to fix the heating wire, provide insulation, and assist in heat conduction. Specifically, the heating wire is made of a nickel-chromium alloy, which has high resistivity, good high-temperature resistance, and oxidation resistance. This alloy can maintain stable heating efficiency under prolonged energization and is not easily oxidized or corroded, extending the service life of the heating wire. When current passes through the heating wire, the heating wire generates heat due to resistance. This heat is conducted through the filler to the wall of the heating tube 40, thereby heating the fluid in the pump chamber 10a. The filler is high-purity magnesium oxide powder, which fills the remaining space inside the heating tube 40, completely encasing the heating wire. Magnesium oxide has excellent insulation properties, effectively preventing leakage between the heating wire and the wall of the heating tube 40, ensuring safe operation. Simultaneously, it has high thermal conductivity, rapidly conducting the heat generated by the heating wire to the wall of the heating tube 40, improving heating efficiency. In addition, the magnesium oxide powder forms a stable support structure inside the heating tube 40, fixing the position of the heating wire and preventing the heating wire from shifting or deforming when impacted by fluid flow or vibrating the pump body 10, thus ensuring the stability and reliability of the heating process.

[0042] It should be noted that, in this embodiment, the pump body 10 includes an upper pump housing 13 and a lower pump housing 14, which are assembled together to form a pump chamber 10a. The motor 20 is located on one side of the lower pump housing 14 and is fixedly installed on the lower pump housing 14.

[0043] Furthermore, the curved segment 41 includes an arc segment 411 and connecting segments 412 disposed at both ends of the arc segment 411. The connecting segments 412 extend from the ends of the arc segment 411 toward the lower end of the straight segment 42, and the two connecting segments 412 approach each other in the direction of extension toward the straight segment 42. The connecting segments 412 extend to the outer side of the circle containing the arc segment 411.

[0044] Specifically, please refer to Figure 5As shown, the curved segment 41 consists of an arc segment 411 and two connecting segments 412. The connecting segments 412 extend from the end of the arc segment 411 to the lower end of the straight segment 42, and the two connecting segments 412 are arranged close to each other. When the heating tube 40 moves downward, the straight segment 42, which might otherwise affect the water flow, is located in the middle of the flow channel. By setting the connecting segments 412 to move the straight segment 42 outward, it avoids the main water flow channel. When the water flows in the pump chamber 10a, the resistance of the straight segment 42 to the water flow is reduced, so the water can flow out from the outlet 10c more smoothly. This optimization significantly reduces the energy loss of the water flow in the pump chamber 10a and improves the liquid delivery efficiency. At the same time, adding the connecting segments 412 can increase the contact area and contact time between the water and the heating tube 40, which means that the liquid can absorb heat more fully, thereby improving the uniformity of heating and avoiding local overheating or undercooling.

[0045] Therefore, this application adds a connecting section 412 between the arc segment 411 and the straight segment 42 to move the straight segment 42 outward, which reduces water flow resistance, improves heating efficiency, and has a positive impact on the overall performance of the heating pump. During long-term operation, stable water flow and efficient heating reduce wear on the pump body 10 and heating pipe 40. Water flow is no longer obstructed, preventing impact on the internal structure of the pump body 10 and reducing the risk of component damage. Simultaneously, the efficient and stable heating process also reduces the workload on the heating pipe 40, extending its service life.

[0046] The connecting section 412 extends to the outside of the circle where the arc section 411 is located, making the distribution of the heating tube 40 in the pump chamber 10a more reasonable. When the liquid flows around the heating tube 40, it can more comprehensively cover the heating area, reduce heating dead zones, and further improve the heating effect.

[0047] Furthermore, the pump body 10 has a circumferential sidewall, which protrudes outward from one side of the two straight segments 42 to form a protruding wall 11, and the distance between the protruding wall 11 and the straight segment 42 is in the range of 5mm-7mm.

[0048] Specifically, please refer to Figure 6As shown, in this embodiment, the two straight segments 42 are moved outwards from the arc segment 411. Therefore, the distance between the straight segments 42 and the circumferential sidewall of the pump body 10 is too close, requiring the position of the circumferential sidewall corresponding to the straight segments 42 to be extended outwards. One side of the circumferential sidewall corresponding to the two straight segments 42 protrudes outwards to form a protruding wall 11. The protruding wall 11 maintains a distance of 5mm-7mm from the straight segments 42, further opening a flow channel for water. When the water flows in the pump chamber 10a, it can move smoothly along the gap between the protruding wall 11 and the straight segments 42, completely getting rid of the obstruction and interference of the straight segments 42 and the connecting segment 412, and can flow more smoothly from the inlet 10b to the outlet 10c. This optimization greatly reduces the energy loss of the water flow in the pump chamber 10a and significantly improves the liquid delivery efficiency. The straight segment 42 moves outward from the arc segment 411 and the connecting segment 412 extends to the outside of the circle where the arc segment 411 is located, which changes the layout of the heating tube 40 in the pump chamber 10a, allowing the liquid to circulate around the heating tube 40 more evenly.

[0049] Given that the pump body 10 is made of plastic, which inherently possesses a certain degree of insulation, safety hazards still exist in long-term humid working environments. Precisely setting the distance between the protruding wall 11 and the straight segment 42 between 5-7mm effectively prevents excessive heat generation from the heating element 40 from accumulating between them, thus avoiding localized overheating and deformation of the plastic pump body 10 and the risk of electrical leakage. Therefore, this application significantly improves the product's safety performance, giving users greater peace of mind.

[0050] Furthermore, the fuse 50 is located in the upper half of the pump chamber 10a.

[0051] Specifically, in this embodiment, the fuse 50 is located in the upper half of the pump chamber 10a. Since the heat generated by the heating element 40 dissipates upwards during operation, when the heating element 40 malfunctions, such as a short circuit causing excessive current and a sudden temperature rise, the fuse 50 located in the upper half of the pump chamber 10a can detect temperature changes more quickly. In actual testing, compared to fuses installed in other locations, this fuse 50 can detect abnormalities earlier and melt in time, cutting off the circuit, preventing further escalation of the fault, and protecting other components within the heating pump from damage, providing a more timely and reliable guarantee for the safe operation of the heating pump. During dishwasher operation, if an abnormal drop in water level occurs, causing the heating element 40 to be partially or completely exposed above the water surface, it can easily lead to dry burning, which not only damages the heating element 40 but may also pose a safety risk. The fuse 50 located in the upper half of the pump chamber 10a can sensitively detect changes in the environment surrounding the heating element 40. When the heating element 40 begins to dry-burn, the temperature of the surrounding air rises rapidly, and the hot air rises to the upper part of the pump chamber 10a. The fuse 50 can quickly detect this temperature anomaly. Once the temperature exceeds the rated operating temperature of the fuse 50, the fuse 50 immediately melts, quickly cutting off the power supply to the heating element 40 and preventing the heating element 40 from continuing to heat up. This effectively avoids damage to the heating element 40 due to dry burning, thus building a solid defense for the safe and stable operation of the heat pump.

[0052] Furthermore, the upper end of the housing protrudes outward to form a protruding platform 12; a straight segment 42 extends out from the protruding platform 12; the heating pump also includes a fixing member 80 for fixing the straight segment 42 extending out from the protruding platform 12.

[0053] Specifically, please refer to Figure 7 As shown, the upper end of the upper shell protrudes outward to form a protrusion platform 12, through which the straight segment 42 extends. This design optimizes the exit path of the heating tube 40, avoiding potential spatial interference problems caused by the straight segment 42 exiting from a conventional location on the pump body 10, and providing a more reasonable layout for the installation of the heating tube 40. The heating pump is equipped with a fixing component 80 to secure the straight segment 42 exiting from the protrusion platform 12. The fixing component 80 can tightly fit the straight segment 42 and the protrusion platform 12, and firmly fixes the straight segment 42 by bolt tightening or snap-fit ​​connection. During long-term operation, the liquid flow inside the pump body 10 and possible vibrations will not cause the straight segment 42 to shift. The protrusion platform 12 makes the exit point of the straight segment 42 more regular, and from an aesthetic perspective, the heating pump is more harmonious and beautiful, enhancing the overall quality of the product. At the same time, the fixing component 80, in conjunction with the protrusion platform 12, provides a certain degree of protection for the exit point of the straight segment 42.

[0054] Furthermore, the protruding platform 12 has two second mounting holes 15 for the straight segment 42 of the heating tube 40 to pass through.

[0055] Specifically, in this embodiment, the protruding platform 12 has two second mounting holes 15 for the straight segment 42 of the heating tube 40 to pass through. This design greatly optimizes the installation process of the heating tube 40. During installation, the installer can accurately align the straight segment 42 with the second mounting holes 15, quickly achieving the initial positioning of the heating tube 40 and the protruding platform 12. The dimensions of the second mounting holes 15 are closely fitted to the straight segment 42, with tolerances controlled within a very small range, ensuring that the straight segment 42 is accurately positioned after installation and will not shift. During long-term operation, the liquid flow inside the pump body 10 and possible vibrations are unlikely to cause displacement of the straight segment 42.

[0056] Furthermore, the circumferential side of the pump body 10 has a first mounting hole 16 for mounting a metal bottom cover 60, which is inserted into the first mounting hole 16; a thermostat 70 is provided outside the metal bottom cover 60, and the thermostat 70, heating tube 40 and fuse 50 are electrically connected in series.

[0057] Specifically, in this embodiment, the metal bottom cover 60 has excellent thermal conductivity. During dishwasher operation, the water temperature in the pump chamber 10a heated by the heating element 40 rises, and the metal bottom cover 60 can quickly absorb the heat from the water. A thermostat 70, installed outside the metal bottom cover 60, is electrically connected in series with the heating element 40 and the fuse 50, forming a complete temperature monitoring and safety protection circuit. Due to the efficient heat transfer performance of the metal bottom cover 60, it can quickly transfer the absorbed heat from the water in the pump chamber 10a to the thermostat 70, allowing the thermostat 70 to monitor the temperature of the bottom area of ​​the pump body 10 in real time and accurately. This area is close to the heating element 40 and can reflect the operating temperature of the heating element 40 very accurately. When the temperature of the heating element 40 rises due to an abnormality, the thermostat 70 will be the first to detect it. Once the temperature reaches the set threshold of the thermostat 70, the thermostat 70 will quickly activate, cutting off the circuit to prevent current from continuously flowing to the heating element 40 and preventing the temperature from rising further. In conjunction with fuse 50, thermostat 70 acts as the first line of defense against temperature fluctuations. It intervenes in a timely manner when the temperature is abnormal but has not yet reached the melting temperature of fuse 50, thereby reducing the potential damage to circuits and equipment caused by frequent melting of fuse 50.

[0058] Furthermore, the first mounting hole 16 is located on the upper half of the circumferential side.

[0059] Specifically, because the first mounting hole 16 is located on the upper half of the circumferential side, the metal bottom cover 60 can better capture heat from the higher-temperature area within the pump chamber 10a at this position, allowing for faster heat transfer to the outside compared to installation in a normal position. The metal bottom cover 60 can quickly transfer the absorbed heat from the high-temperature area within the pump chamber 10a to the temperature controller 70, enabling the temperature controller 70 to monitor the temperature of the bottom area of ​​the pump body 10 in real time and accurately. This area is close to the heating element 40 and can reflect the operating temperature of the heating element 40 very accurately. When the temperature of the heating element 40 rises due to abnormal conditions, the temperature controller 70 will be the first to detect it. Once the temperature reaches the set threshold of the temperature controller 70, the temperature controller 70 will quickly activate, cutting off the circuit and preventing current from continuously flowing to the heating element 40, thus preventing the temperature from rising further.

[0060] Furthermore, the impeller assembly 30 includes an impeller seat 31, blades 32 mounted on the impeller seat 31, and an impeller cover 33 disposed above the impeller seat 31; a portion of the blades 32 extends out of the impeller seat 31.

[0061] Specifically, please refer to Figure 8 As shown, the impeller assembly 30 consists of an impeller seat 31, blades 32 mounted on the impeller seat 31, and an impeller cover 33 disposed above the impeller seat 31. A portion of the blades 32 extends out of the impeller seat 31; this structural design optimizes the effect of the impeller assembly 30 on the liquid. When the motor 20 drives the impeller seat 31 to rotate, the blades 32 extending out of the impeller seat 31 can agitate the liquid within the pump chamber 10a over a wider area, increasing the liquid flow rate compared to traditional impeller designs. This faster liquid flow not only helps improve liquid delivery efficiency but also allows the liquid to be distributed more evenly within the pump chamber 10a, further enhancing heating uniformity. Simultaneously, the impeller cover 33 prevents liquid splashing, ensuring orderly liquid flow under the action of the impeller assembly 30, reducing energy loss, improving the operational stability of the impeller assembly 30, and thus ensuring the overall efficient and stable operation of the heating pump. When working in conjunction with the heating element 40 and other components of the pump body 10, the impeller assembly 30's efficient liquid agitation capability allows the liquid to pass through the heating element 40 more quickly, accelerating heat exchange, improving heating efficiency, and meeting the dishwasher's requirements for water flow rate and water temperature.

[0062] This utility model also proposes a dishwasher, which includes the above-mentioned heating pump. The specific structure of the heating pump is as described in the above embodiments. Since this dishwasher adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0063] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A heating pump for a dishwasher, characterized in that, include: The pump body has a pump chamber and an inlet and an outlet communicating with the pump chamber; An electric motor is connected to the pump body, and the motor shaft passes through the pump body; An impeller assembly is disposed within the pump body and mounted on the rotating shaft; A heating element is fixedly installed on the pump body. The heating element includes a curved section and two straight sections connected to both ends of the curved section. The curved section is located below the impeller assembly, and the two straight sections extend upward and out of the pump body. A fuse, wherein the fuse is installed within any of the said straight segments.

2. The heating pump as described in claim 1, characterized in that, The curved segment includes an arc segment and connecting segments disposed at both ends of the arc segment. The connecting segments extend from the end of the arc segment toward the lower end of the straight segment, and the two connecting segments are close to each other in the direction of extension toward the straight segment.

3. The heating pump as described in claim 2, characterized in that, The connecting segment extends to the outside of the circle containing the arc segment.

4. The heating pump as described in claim 3, characterized in that, The pump body has a circumferential sidewall, which protrudes outward from one side corresponding to the two straight segments to form a protruding wall. The distance between the protruding wall and the straight segment is in the range of 5mm-7mm.

5. The heating pump as described in claim 4, characterized in that, The fuse is located in the upper part of the pump chamber.

6. The heating pump as described in claim 5, characterized in that, The upper end of the pump body protrudes outward to form a protruding platform; the straight segment extends through the protruding platform; the heating pump also includes a fixing member for fixing the straight segment extending through the protruding platform.

7. The heating pump as described in claim 6, characterized in that, The protruding surface has two second mounting holes for the straight section of the heating tube to pass through.

8. The heating pump as described in claim 6, characterized in that, The pump body has a first mounting hole on its circumferential side. The first mounting hole is used to install a metal bottom cover, which is inserted into the first mounting hole. A thermostat is provided outside the metal bottom cover. The thermostat, the heating element, and the fuse are electrically connected in series.

9. The heating pump as described in claim 8, characterized in that, The first mounting hole is located on the upper half of the circumferential side surface.

10. The heating pump as claimed in claim 1, characterized in that, The impeller assembly includes an impeller seat, blades mounted on the impeller seat, and an impeller cover disposed above the impeller seat; a portion of the blades extends out of the impeller seat.

11. A dishwasher, characterized in that, Including the heating pump as described in any one of claims 1 to 10.

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