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 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] The utility model relates to the technical field of dishwashers, and particularly to a heating pump and a dishwasher adopting the heating pump. Background Art

[0002] At present, the energy efficiency grades of domestic dishwashers have been compulsorily marked, and the energy efficiency of European ERP has been upgraded. Therefore, the improvement of the heating efficiency of dishwashers has attracted more and more attention. In order to achieve better heat exchange effects, some cast aluminum shell heaters have emerged in dishwasher integrated heat pumps. However, many solutions in the market have not yet exerted the heat exchange advantages of cast aluminum heaters, and the heat exchange efficiency of cast aluminum shell heaters can still be further improved.

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

[0004] The main object of the utility model is to propose a heating pump, aiming to further improve the heat exchange efficiency.

[0005] To achieve the above object, the utility model proposes a heating pump, comprising:

[0006] A pump housing having a water inlet and a water outlet;

[0007] An impeller disposed inside the pump housing;

[0008] A motor drivingly connected to the impeller;

[0009] A heater attached to the outer wall of the pump housing;

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

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

[0012] In one embodiment, the cylinder body and the heat-conducting vortex rib are made of cast aluminum, and the cylinder body and the heat-conducting vortex rib are integrally formed die-castings; 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 rib includes a plurality of spaced-apart heat-conducting fins, and the plurality of heat-conducting fins extend from the end face wall of the cylinder body towards the inside of the cylinder body.

[0014] In one embodiment, the shape of the heat-conducting fin is C-shaped; the notch of the heat-conducting fin is arranged corresponding to the water outlet.

[0015] In one embodiment, the length that the heat-conducting fin extends towards the inside of the cylinder gradually decreases in the direction from far away from the notch to close to the notch, and / or the notch position of the heat-conducting fin has an inclined chamfer.

[0016] In one embodiment, the heating pump further includes a thermostat, the thermostat is installed on the heat transfer plate, and the thermostat is electrically connected to the heating pipe.

[0017] In one embodiment, the heating pipe includes a bent circular part and two extending parts, the two extending parts are respectively arranged at both ends of the bent circular part; the bent circular part is embedded in the heat transfer plate; the extending part extends out of the heat transfer plate and is connected to the thermostat.

[0018] In one embodiment, the number of turns of the bent circular part of the heating pipe is between 1 turn and 2 turns.

[0019] In one embodiment, the pump housing further includes a water inlet pipe and a water outlet pipe; the water inlet pipe is connected to the end face wall of the cylinder; the water outlet pipe is connected to the side wall of the cylinder; the water inlet is arranged on the water inlet pipe, and the water outlet is arranged on the water outlet pipe.

[0020] In one embodiment, the shape of the heat transfer plate is annular, the heat transfer plate is sleeved on the water inlet pipe, and a heat-conducting material is arranged between the heat transfer plate and the end face 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 adapted to the positioning protrusion.

[0022] The present utility model also provides a dishwasher, including the above-mentioned heating pump.

[0023] In the heating pump of the technical solution of the present utility model, a heat-conducting vortex rib is arranged in the pump housing, and the heat-conducting vortex rib increases the area of contact with water and improves the heat exchange rate. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0025] Figure 1Structural schematic diagram of a perspective of an embodiment of the heat pump provided by the present utility model;

[0026] Figure 2 Cross-sectional structural schematic diagram of an embodiment of the heat pump provided by the present utility model;

[0027] Figure 3 Structural schematic diagram of another perspective of an embodiment of the heat pump provided by the present utility model;

[0028] Figure 4 Cross-sectional structural schematic diagram at the heater position of an embodiment of the heat pump provided by the present utility model;

[0029] Figure 5 Structural schematic diagram of a perspective of the cylinder body of an embodiment of the heat pump provided by the present utility model;

[0030] Figure 6 Structural schematic diagram of another perspective of the cylinder body of an embodiment of the heat pump provided by the present utility model;

[0031] Figure 7 Structural schematic diagram at the heater of an embodiment of the heat pump provided by the present utility model;

[0032] Figure 8 Structural schematic diagram of the heating pipe of an embodiment of the heat pump provided by the present utility model.

[0033] Explanation of the reference numerals in the drawings:

[0034] 100, heat pump; 1, pump housing; 11, water inlet; 12, water outlet; 13, housing; 131, fixing plate; 132, cylinder body; 14, heat-conducting vortex ridge; 141, heat-conducting fin; 142, notch; 15, water inlet pipe; 151, positioning protrusion; 16, water outlet pipe; 2, motor; 3, impeller; 4, heater; 41, heat transfer plate; 411, positioning groove; 42, heating pipe; 421, bent circular part; 422, protruding part; 5, temperature controller. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

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

[0037] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or is unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] There is an increasing concern about the energy efficiency of dishwashers in the market, so the heating efficiency of dishwashers has attracted wide attention. In order to achieve a better heat exchange effect, some cast aluminum shell heaters have emerged in the dishwasher integrated heat pump. Such cast aluminum shell heaters have improved the heat exchange efficiency, but the heat exchange advantage of the cast aluminum heater has not been fully exploited, and the heat exchange efficiency of the heater can be further improved. Therefore, this application designs a heat pump with a high heat exchange rate.

[0039] Please refer to Figures 1 to 4 As shown, a heat pump 100 provided by an embodiment of the present application includes a pump housing 1, a motor 2, an impeller 3, and a heater 4. The pump housing 1 has a water inlet 11 and a water outlet 12. The motor 2 is disposed at the bottom of the pump housing 1, and the heater 4 is disposed at the top of the pump housing 1. The impeller 3 is disposed inside the pump housing 1, and the motor 2 is in transmission connection with the impeller 3. The heater 4 is attached to the outer wall of the pump housing 1. The pump housing 1 includes a housing 13 and a heat-conducting vortex rib 14. The heat-conducting vortex rib 14 is disposed on the inner wall of the housing 13 and is used for heat exchange with the water entering the housing 13 from the water inlet 11.

[0040] Specifically, the heat pump 100 includes a heater 4, a pump housing 1, and a motor 2 arranged in sequence from top to bottom. The heater 4 is disposed above the pump housing 1, and the motor 2 is disposed below the pump housing 1. An impeller 3 is further arranged inside the pump housing 1. The impeller 3 is in transmission connection with the motor 2. By rotating the motor 2, the impeller 3 inside the pump housing 1 is driven to rotate. When the impeller 3 rotates, the water inside the pump housing 1 is driven to rotate. The pump housing 1 has a water inlet 11 and a water outlet 12. The water inlet 11 is used for allowing the water from the outside to enter the space inside the pump housing, and the water outlet 12 is used for allowing the water inside the pump housing 1 to flow out to the outside. The heater 4 is attached to the outer wall of the pump housing 1. The heater 4 generates heat and first transfers the heat to the outer wall of the pump housing 1, and then transfers the heat to the inside of the pump housing 1. The pump housing 1 includes a housing body 13 and a heat-conducting vortex rib 14. The heat-conducting vortex rib 14 is arranged on the inner wall of the housing body 13. The heater 4 is in contact with the housing body 13. The heat of the heater 4 is transferred to the housing body 13, and then the heat is transferred to the heat-conducting vortex rib 14. The water inside the housing body 13 is driven by the impeller 3 to rotate inside the housing body 13. When the water rotates inside the housing body 13, it will contact the inner surface of the housing body 13 and the heat-conducting vortex rib 14 inside the housing body 13. The heat-conducting vortex rib 14 can increase the contact area with the water, thereby improving the heat exchange efficiency.

[0041] In an alternative embodiment, the housing body 13 includes a fixing plate 131 and a cylinder 132 with an opening. The fixing plate 131 is installed at the opening position of the cylinder 132 to close the opening. The heat-conducting vortex rib 14 is integrally arranged on the inner wall of the cylinder 132. The cylinder 132 and the heat-conducting vortex rib 14 are made of cast aluminum, and the cylinder 132 and the heat-conducting vortex rib 14 are integrally formed die-castings. 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 cylinder 132. The cylinder 132 has an opening, and the fixing plate 131 is installed at the opening position to close the opening of the cylinder 132. The opening of the cylinder 132 is arranged downward, and the end face wall of the cylinder 132 (i.e., the bottom wall of the cylinder 132 facing the opening) is arranged upward. The motor 2 is installed below the fixing plate 131. The heater 4 is arranged at the top of the cylinder 132, that is, the heater 4 is arranged outside the end face wall of the cylinder 132, and the heat transfer plate 41 of the heater 4 is attached to the end face wall of the cylinder 132. The space formed by the cylinder 132 and the fixing plate 131 is used to hold water, and heat exchange occurs between the water and the cylinder 132 to heat the cold water entering the inside of the cylinder 132. The heat conduction vortex ridges 14 are arranged inside the cylinder 132, and the heat conduction vortex ridges 14 are arranged inside the end face wall of the cylinder 132. The heat conduction vortex ridges 14 correspond to the impeller 3. When the impeller 3 rotates, it drives the water inside the cylinder 132 to rotate, so that the water inside the cylinder 132 contacts the heat conduction vortex ridges 14 and the inner wall of the cylinder 132 to conduct heat exchange. In this embodiment, both the cylinder 132 and the heat conduction vortex ridges 14 are made of cast aluminum material. The cast aluminum material has a high thermal conductivity, which is beneficial to improving the heat transfer efficiency. The cylinder 132 and the heat conduction vortex ridges 14 are integrally formed die-castings. The heater 4 includes a heat transfer plate 41 and a heating tube 42 which are integrally arranged. A part of the heating tube 42 is embedded in the heat transfer plate 41. The heat transfer plate 41 is also made of cast aluminum material. Using the cast aluminum heat transfer plate 41 facilitates heat transfer. The heating tube 42 and the heat transfer plate 41 can be manufactured by an integral die-casting method. When manufacturing, first place the heating tube 42 into the mold, and then add the cast aluminum material into 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 elaborated here.

[0043] When installing this embodiment, first assemble the motor 2 into a whole or directly purchase a finished motor 2. The motor 2 includes a housing, a stator, a magnetic ring, a transmission shaft, bearings, etc. The motor 2 is a prior art and will not be elaborated here. Then pass the transmission shaft of the motor 2 through the fixing plate 131, install the impeller 3 on the upper end of the fixing plate 131, and finally fix the fixing plate 131 and the motor 2 together at the opening of the cylinder 132 to fix the impeller 3 inside the cylinder 132 and close the opening of the cylinder 132.

[0044] During use, after the heating tube 42 is powered on, the heating tube 42 generates a large amount of heat. The heat is first transferred to the heat transfer plate 41. The heat transfer plate 41 is attached to the end face wall of the cylinder body 132, and then the heat transfer plate 41 transfers the heat to the end face wall of the cylinder body 132. Subsequently, the cylinder body 132 transfers the heat to other parts of the cylinder body 132 and the heat conducting vortex ridges 14 inside the cylinder body 132. When the cold water from the outside enters the inside of the cylinder body 132 through the water inlet 11, it rotates inside the cylinder body 132 under the action of the impeller 3. When the cold water rotates inside the cylinder body 132, it makes full contact with the heat conducting vortex ridges 14 and the inner wall of the cylinder body 132 to conduct heat exchange, thereby heating the water inside the cylinder body 132. The heat conducting vortex ridges 14 increase the heat exchange area between the cylinder body 132 and the water, improving the heat exchange efficiency. In this application, the heater 4 made of cast aluminum material is used, and the heating efficiency is improved. Also, the cylinder body 132 made of cast aluminum material is adopted, and the efficiency of transferring heat from the heater 4 to the cylinder body 132 is relatively high. Finally, the contact area with water is increased through the heat conducting vortex ridges 14, thus greatly increasing the heat exchange rate. Therefore, the solution of this application can improve the heat exchange efficiency of the heat pump 100. In the market, the heating element is arranged inside the pump housing. In the process of using such a structure, if the heating element fails, the pump housing needs to be replaced, which increases the maintenance cost at this time and is not convenient for later maintenance. And there are no heat conducting vortex ridges 14 inside the pump housing in the market. In this application, a modular heater 4 is provided. The heater 4 includes a heat transfer plate 41 and a heating tube 42 integrally die-cast. Coupled with the fact that the heater 4 and the pump housing 1 are two independent structures, when the heater 4 fails later, only the heater 4 needs to be maintained or replaced directly, which is convenient for later maintenance and reduces the maintenance cost. At the same time, due to the presence of the heat conducting vortex ridges 14 in this application, the heat exchange efficiency is also greatly improved.

[0045] Please refer to Figure 5 and Figure 6 As shown, the pump housing 1 further includes a water inlet pipe 15 and a water outlet pipe 16. The water inlet pipe 15 is connected to the end face wall of the cylinder body 132, and the water outlet pipe 16 is connected to the side wall of the cylinder body 132. The water inlet 11 is arranged on the water inlet pipe 15, and the water outlet 12 is arranged on the water outlet pipe 16.

[0046] Specifically, the cylinder body 132, the water inlet pipe 15, the water outlet pipe 16 and the heat conducting vortex ridges 14 are integrally formed. The water inlet pipe 15 is arranged at the middle position of the end face wall of the cylinder body 132, and the water inlet pipe 15 extends outward from the end face wall to protrude from the end face wall. One end of the water outlet pipe 16 is connected to the side wall of the cylinder body 132, and the other end extends outward. The water inlet 11 is arranged on the water inlet pipe 15, and the water outlet 12 is arranged on the water outlet pipe 16. The water inlet 11, the internal space of the cylinder body 132 and the water outlet 12 are connected. During use, the cold water first enters the inside of the cylinder body 132 through the water inlet 11, and after heat exchange with the inner wall of the cylinder body 132 and the heat conducting vortex ridges 14, it is then sent out to the outside through the water outlet 12.

[0047] Please refer to Figure 7 As shown, in this embodiment, the heat transfer plate 41 is annular in shape. The heat transfer plate 41 is sleeved on the water inlet pipe 15, and a heat conductive material is provided between the heat transfer plate 41 and the end face wall of the cylinder body 132. The heat transfer plate 41 and the heating pipe 42 are integrally die-cast, so that the heat of the heating pipe 42 can be more effectively transferred to the large-area heat transfer plate 41 and then transferred to other positions through the heat transfer plate 41. The heat transfer plate 41 and the end face wall of the cylinder body 132 can be fixed by screws. Installation holes (not marked in the figure) are provided on the end face wall of the cylinder body 132, and installation holes (not marked in the figure) are provided at positions corresponding to the positioning holes on the heat transfer plate 41. The screws pass through the heat transfer plate 41 and the cylinder body 132 to fix the two together. In this application, the pump housing 1 and the heater 4 are separately manufactured and then connected by screws and heat conductive materials, which is convenient for modular production, conducive to standardization, and more convenient for after-sales maintenance and replacement. It can be understood that the heat conductive material between the heat transfer plate 41 and the cylinder body 132 can be selected according to actual needs, such as heat conductive glue, etc. The specific material and thermal conductivity of the heat conductive material are not limited here.

[0048] In some alternative embodiments, the outer wall of the water inlet pipe 15 has a positioning protrusion 151, and the middle position of the heat transfer plate 41 has a positioning groove 411 adapted to the positioning protrusion 151. During assembly, first align the positioning groove 411 of the heat transfer plate 41 with the positioning protrusion 151 on the water inlet pipe 15, and then sleeve the heat transfer plate 41 on the water inlet pipe 15. The setting of the positioning groove 411 and the positioning protrusion 151 facilitates assembly and plays a role in preventing mistakes during assembly.

[0049] Please refer to Figure 6 As shown, the heat conductive vortex ridges 14 include a plurality of heat conductive fins 141 arranged at intervals. The heat conductive fins 141 extend from the end face wall of the cylinder body 132 towards the inside of the cylinder body 132. The water inlet pipe 15 is connected to the end face wall of the cylinder body 132, and the heat conductive fins 141 extend from the end face wall of the cylinder body 132 towards its inside, so that the cold water entering from the water inlet 11 can fully contact the heat conductive fins 141. Under the action of the heat conductive fins 141, the heat exchange efficiency is improved.

[0050] In an optional embodiment, the shape of the heat-conducting fin 141 is C-shaped. The heat-conducting fin 141 is coaxially arranged with the impeller 3, and the notch 142 of the heat-conducting fin 141 is close to the water outlet 12. Specifically, the number of the heat-conducting fins 141 is multiple, and the multiple C-shaped heat-conducting fins 141 are evenly spaced around the axis of the impeller 3. When the impeller 3 rotates in the cylinder 132, it drives the water in the cylinder 132 to rotate. Setting the heat-conducting fin 141 to be C-shaped can facilitate the impeller 3 to drive the water to rotate inside, reducing the resistance when the water rotates inside the cylinder 132. The notch 142 of the heat-conducting fin 141 is provided to not affect the hydraulic performance, so that the heated water can smoothly pass through the notch 142 and then be sent out to the outside from the water outlet 12. In this embodiment, the heat-conducting fin 141 has a C-shaped structure of about 270 degrees, and the size of the notch 142 is larger than the size of the water outlet 12 to prevent the heat-conducting fin 141 from blocking the heated water. In some embodiments, the height of the heat-conducting fin 141 gradually decreases from the direction away from the water outlet 12 to the direction close to the water outlet 12, and this structure can reduce the influence of the heat-conducting fin 141 on the hydraulic performance. There is an inclined chamfer at the position of the notch 142 of the heat-conducting fin 141, and the inclined chamfer is also for facilitating the smooth delivery of the water inside the cylinder 132.

[0051] It should be noted that the shape of the heat-conducting fin 141 can also be strip-shaped, L-shaped, or other irregular shapes. Among them, the L-shaped is composed of two strip-shaped walls connected at an angle. The heat-conducting fins 141 of the above-mentioned shapes can all increase the contact area with water to improve the heat exchange rate. The shape and size of the heat-conducting fin 141 are set according to actual needs and are not limited here.

[0052] Please refer to Figure 1 and Figure 8 As shown in the figure, the heat pump 100 further includes a thermostat 5. The thermostat 5 is installed on the heater 4, and the thermostat 5 is electrically connected to the heating pipe 42. The heating pipe 42 includes a bent circular part 421 and two extending parts 422. The two extending parts 422 are respectively arranged at both ends of the bent circular part 421. The bent circular part 421 is embedded in the heat transfer plate 41, and the extending parts 422 extend out of the heat transfer plate 41 and are connected to the thermostat 5.

[0053] Specifically, the heat pump 100 further includes a thermostat 5 installed on the heater 4. The thermostat 5 is electrically connected to the heating pipe 42 to control the temperature of the heating pipe 42 through the thermostat 5. The thermostat 5 is arranged at one end of the heat transfer plate 41 of the heater 4 away from the pump housing 1. The heating pipe 42 includes a bent circular portion 421 and two protruding portions 422. The two protruding portions 422 are respectively arranged at both ends of the bent circular portion 421. The protruding portions 422 extend out of the outside from one end of the heat transfer plate 41 away from the pump housing 1 and are connected to the thermostat 5. The heating pipe 42 of the present application is integrally die-cast with the heat transfer plate 41 to integrally embed the bent circular portion 421 of the heating pipe 42 into the inside of the heat transfer plate 41, so that the molecular distance between the heating pipe 42 and the heat transfer plate 41 is closer, and the heat transfer efficiency between the heating pipe 42 and the heat transfer plate 41 is improved. The part of the heating pipe 42 embedded in the heat transfer plate 41 is arranged in a bent circular structure, so that the heating pipe 42 of the bent circular portion 421 can be distributed on the heat transfer plate 41, so that the contact area between the heating pipe 42 and the heat transfer plate 41 is increased, and the heat transfer efficiency between the heating pipe 42 and the heat transfer plate 41 is improved.

[0054] As Figure 8 shown, in this embodiment, the number of turns of the bent circular portion 421 is between one turn and two turns. That is, a part of the bent circular portion 421 has two turns, and the other part has one turn. The heat conduction vortex ridge 14 corresponds to the part of the heating pipe 42 with two turns, and the notch 142 corresponds to the part of the heating pipe 42 with one turn. In this way, the heat of the heating pipe 42 can be fully transferred to the liquid to be heated through the heat conduction vortex ridge 14. It should be noted that the number of turns of the bent circular portion 421 can be more, and the specific number of bends is specifically set according to parameters such as the diameter of the heating pipe 42 and the size of the heat transfer plate 41, and is not limited here.

[0055] It can be understood that the bent circular portion 421 can also adopt other shapes, such as a wavy shape or other irregular shapes, as long as it can increase the contact area between the heating pipe 42 embedded in the heat transfer plate 41 and the heat transfer plate 41.

[0056] The present application also relates to a dishwasher, which includes the above-mentioned heating pump 100. The heating 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 pipe 42, and the heating pipe 42 is integrally die-cast within the heat transfer plate 41. The pump housing 1 includes an integrally formed cylindrical body 132 and a heat-conducting vortex rib 14. The heat-conducting vortex rib 14 is disposed inside the end face wall of the cylindrical body 132, and the heat transfer plate 41 is attached to the outside of the end face wall of the cylindrical body 132. The heat-conducting vortex rib 14 is used for heat exchange with the water entering from the outside, so as to heat the incoming water. The pump housing 1 has a water inlet 11 and a water outlet 12. The heater 4 is disposed above the pump housing 1, the motor 2 is disposed below the pump housing 1, the impeller 3 is disposed inside the pump housing 1, and the motor 2 is in transmission connection with the impeller 3. In the present application, the heater 4 adopts an integrally die-cast heat transfer plate 41 and heating pipe 42 to form a modular heater 4. The heat transfer plate 41 is made of cast aluminum, and the heating pipe 42 has a high efficiency in transferring heat to the heat transfer plate 41. Furthermore, a heat-conducting vortex rib 14 is integrally formed on the cylindrical body 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 is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A heat pump, characterized in that, Comprising: A pump housing having a water inlet and a water outlet; An impeller disposed inside the pump housing; A motor drivingly connected to the impeller; A heater attached to the outer wall of the pump housing; Wherein, the pump housing includes a housing body and heat-conducting vortex ridges connected to the inner wall of the housing body; the heat-conducting vortex ridges are used for heat exchange with the water entering the housing body from the water inlet.

2. The heat pump according to claim 1, characterized in that, The housing body includes a fixing plate and a cylinder body with an opening, and the fixing plate is used to close the opening; the heat-conducting vortex ridges are integrally provided on the inner wall of the cylinder body.

3. The heat pump according to claim 2, characterized in that, The cylinder body and the heat-conducting vortex ridges are made of cast aluminum, and the cylinder body and the heat-conducting vortex ridges are integrally formed die-castings; the heater includes a heat transfer plate and heating tubes, the heating tubes are embedded in the heat transfer plate, the heat transfer plate is made of cast aluminum, and the heat transfer plate and the heating tubes are integrally die-cast.

4. The heat pump according to claim 3, characterized in that, The heat-conducting vortex ridges include a plurality of spaced heat-conducting fins extending from the end face wall of the cylinder body into the interior of the cylinder body.

5. The heat pump according to claim 4, characterized in that, The shape of the heat-conducting fins is C-shaped; the notch of the heat-conducting fins is arranged corresponding to the water outlet.

6. The heat pump according to claim 5, characterized in that, The length of the heat-conducting fins extending into the interior of the cylinder body gradually decreases in the direction from far away from the notch to close to the notch; and / or there is an inclined chamfer at the notch position of the heat-conducting fins.

7. The heat pump according to claim 3, characterized in that, The heat pump further includes a thermostat installed on the heat transfer plate, and the thermostat is electrically connected to the heating tubes.

8. The heat pump according to claim 7, wherein, The heating tubes include a bent circular portion and two extending portions respectively arranged at both ends of the bent circular portion; the bent circular portion is embedded in the heat transfer plate; the extending portions extend out of the heat transfer plate and are connected to the thermostat.

9. The heat pump according to claim 8, wherein, The number of turns of the bent circular portion is between 1 and 2 turns.

10. The heat pump according to claim 3, characterized in that, The pump housing further includes a water inlet pipe and a water outlet pipe; the water inlet pipe is connected to the end face wall of the cylinder body; the water outlet pipe is connected to the side wall of the cylinder body; the water inlet is arranged on the water inlet pipe, and the water outlet is arranged on the water outlet pipe.

11. The heat pump according to claim 10, characterized in that, The shape of the heat transfer plate is annular, the heat transfer plate is sleeved on the water inlet pipe, and a heat-conducting material is arranged between the heat transfer plate and the end face wall of the cylinder body.

12. The heat pump according to claim 10, characterized in that, There are positioning protrusions on the outer wall of the water inlet pipe, and positioning grooves adapted to the positioning protrusions are provided on the heat transfer plate.

13. A dishwasher, characterized in that, Including the heat pump according to any one of claims 1 to 12.

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