A heat pump and a dishwasher having the heat pump

Abstract

This application discloses a heat pump and a dishwasher incorporating the heat pump, comprising a motor assembly, a pump housing, an impeller, and a heating assembly. The pump housing includes an inlet section and an outlet section, with an inlet channel in the inlet section and an outlet channel in the outlet section. The heat pump also has a pump chamber, with the impeller disposed within the pump chamber. The heating assembly is at least partially housed within the pump chamber. The inlet channel communicates with the pump chamber, and the outlet channel communicates with the pump chamber. The heat pump includes a detection device and a transfer pipe, which is directly or indirectly fixed to the inlet or outlet section. The transfer pipe includes a mounting section with a channel, and a connecting channel communicating with the inlet or outlet channel. The detection device is mounted on the mounting section, with a portion of the detection device located within the channel. The detection device is capable of detecting the fluid pressure flowing through the connecting channel. The heat pump of this application improves safety.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more specifically, particularly to a heat pump and a dishwasher having the heat pump. Background Technology

[0002] Dishwashers and other home appliances use high-temperature, high-pressure water to wash the surfaces of dishes during operation, requiring a power system and a heating system to work together to deliver hot water. A heat pump can meet the power and heating needs of a dishwasher. This heat pump includes a motor assembly, a pump housing, and a heating element. To reduce the possibility of the heat pump running dry, a pressure switch installed on the pump housing is used to detect the water pressure inside the pump chamber. Because the pressure switch and the heating element are close together, the pressure switch is prone to aging, and leaks may occur at the pressure switch mounting location. Summary of the Invention

[0003] One objective of this application is to provide a heating pump that can improve safety performance.

[0004] To achieve the above objectives, the heating pump of this application includes a motor assembly, a pump casing, an impeller, and a heating assembly. The pump casing includes an inlet section and an outlet section. The inlet section has an inlet channel, and the outlet section has an outlet channel. The heating pump also has a pump chamber, with the impeller placed in the pump chamber. The heating assembly is at least partially housed in the pump chamber. The inlet channel communicates with the pump chamber, and the outlet channel communicates with the pump chamber. The heating pump includes a detection device and a transfer pipe. The transfer pipe is directly or indirectly fixed to the inlet section or the outlet section. The transfer pipe includes a mounting section, which includes a channel. The transfer pipe includes a transfer channel, which communicates with the inlet channel or the outlet channel. The detection device is mounted on the mounting section, with a portion of the detection device located in the channel. The detection device is capable of detecting the fluid pressure flowing through the transfer channel.

[0005] As can be seen from the above technical solutions, the heating pump includes an impeller, a pump casing, a transfer pipe, and a detection device. The detection device is installed on the transfer pipe, which is located at the water outlet or water inlet. The detection device can detect the fluid pressure inside the transfer pipe, and the detection device is far away from the heating device, which improves the safety of the heating pump.

[0006] The heating pump includes a sealing component, and the adapter pipe includes a connecting portion, the connecting portion being fixedly connected to the water inlet portion, the sealing component being at least partially located between the connecting portion and the water inlet portion, and the sealing component contacting the connecting portion and the water inlet portion; or the connecting portion being fixedly connected to the water outlet portion, the sealing component being at least partially located between the connecting portion and the water outlet portion, and the sealing component contacting the connecting portion and the water outlet portion.

[0007] The adapter includes a clamping part located at one end of the adapter. One end of the clamping part is connected to the connecting part. In the axial direction of the connecting part, the other end of the clamping part extends away from the mounting part. The clamping part is fixedly connected to the sealing member, and the sealing member is partially located between the clamping part and the water outlet part.

[0008] The clamping part has a groove and a notch. The outer peripheral wall of the clamping part is recessed inward to form the groove, and the notch penetrates the wall of the clamping part in the radial direction.

[0009] The heating pump includes a fixing member, which is sleeved on the outer periphery of the clamping part and at least partially accommodated in the groove. The fixing member abuts against the clamping part, and the fixing member causes the clamping part to narrow in the radial direction of the clamping part toward the water outlet part.

[0010] The adapter includes the stepped portion, which is connected to the connecting portion. The connecting portion is located between the stepped portion and the clamping portion. The sealing component includes a first sealing portion and a second sealing portion. The water outlet includes a water outlet end, which is located at the end of the water outlet away from the impeller. In the radial direction of the water outlet end, a portion of the first sealing portion is located between the water outlet end and the connecting portion, and the first sealing portion abuts against the water outlet end. A portion of the first sealing portion abuts against the clamping portion and abuts against the connecting portion. In the axial direction of the water outlet end, the second sealing portion is located between the second sealing portion and the water outlet end, and the second sealing portion abuts against the water outlet end and the second sealing portion abuts against the stepped portion.

[0011] The sealing component is made of rubber, the pump housing is made of plastic, the adapter pipe is made of plastic, the channel includes a first channel and a second channel, the first channel and the second channel are connected, the diameter of the first channel is smaller than the diameter of the second channel, the detection device is installed at the second channel of the mounting part, the axis of the second channel is perpendicular to the axis of the adapter channel, and the sealing component and the pump housing are integrally formed; or the sealing component and the adapter pipe are integrally formed.

[0012] The water inlet includes a main body located in the pump chamber, protruding from the bottom of the corresponding pump chamber. The curved section maintains a distance from the main body, with the distance between the curved section and the main body being between 50mm and 80mm. The curved section includes a first curved section, a second curved section, and a connecting section. The first curved section and the second curved section are arranged side by side and are both accommodated in the space between the outer wall of the main body and the inner wall of the pump casing corresponding to the pump chamber. The heating assembly includes a sealing element, a fixing element, a first flange, and a second flange. The pump casing includes a fixing part. The heating tube includes a first straight section and a second straight section. One end of the first curved section is connected to one end of the first straight section. The other end of the segment is connected to one end of the connecting segment. One end of the second curved segment is connected to one end of the second straight segment. The other end of the second curved segment is connected to the other end of the connecting segment. A portion of the first straight segment and a portion of the second straight segment are both located outside the pump cavity. The seal and the first flange are located inside the pump cavity. The first flange is fixedly connected to the first straight segment and the second straight segment respectively. The second flange is located outside the pump cavity. The seal and the fixing part are located between the first flange and the second flange. The fixing part is connected to the first flange and the second flange respectively. The fixing part is used to fix the first flange and the second flange to clamp the seal and the fixing part.

[0013] The heating pump also includes a bushing, which is fixedly connected or limited to the pump casing. At least a portion of the bushing is located in the pump chamber. The impeller outlet is located on the side of the bushing facing away from the motor assembly. The bushing includes a spiral portion located on the side of the bushing facing away from the motor assembly.

[0014] Another object of this application is to provide a dishwasher comprising a body, a circulation system and a heating pump as described in this application, wherein the body includes an inner tank and a water cup, the circulation system is connected to the inner tank and the water cup, and the heating pump provides power to the circulation system. Attached Figure Description

[0015] Figure 1This is an assembly diagram of a heat pump according to an embodiment of this application;

[0016] Figure 2 This is an exploded schematic diagram of a heating pump according to an embodiment of this application;

[0017] Figure 3 yes Figure 1 A schematic diagram of a cross-section taken along line AA.

[0018] Figure 4 This is an assembly diagram of the pump housing and the transfer pipe according to an embodiment of this application;

[0019] Figure 5 This is an exploded schematic diagram of the pump casing and transfer pipe according to an embodiment of this application;

[0020] Figure 6 yes Figure 4 A schematic diagram of a cross-section taken along line BB.

[0021] Figure 7 yes Figure 6 Enlarged diagram of the C-ring;

[0022] Figure 8 This is a schematic diagram of the transfer tube structure according to an embodiment of this application;

[0023] Figure 9 yes Figure 8 A schematic diagram of a cross-section taken along line DD.

[0024] Figure 10 This is a schematic cross-sectional view of the pump casing and bushing according to an embodiment of this application;

[0025] Figure 11 This is a schematic diagram of the bushing structure according to an embodiment of this application;

[0026] Figure 12 This is a schematic cross-sectional view of the pump casing, heating tube, and impeller according to an embodiment of this application;

[0027] Figure 13 This is a schematic diagram of the structure of a heating assembly according to an embodiment of this application.

[0028] Figure label:

[0029] 1-Motor assembly; 11-Shaft; 2-Pump casing; 21-Inlet; 211-Inlet channel; 212-Main body; 213-Inlet end; 22-Outlet; 221-Outlet channel; 223-Outlet end; 2231-Threaded protrusion; 23-Pump chamber; 231-Bottom of pump chamber; 232-Pump chamber wall; 24-Positioning groove; 25-Stepped part; 26-Fixing part; 3-Impeller; 31-Impeller outlet; Impeller inlet; 32; 4-Heating assembly; 41-Heating tube; 411-First straight section; 412-Second straight section; 413-Bent section; 4131-First bent section; 4132-Second bent section; 4133-Connecting section; 42-Seal; 43-Bolt; 44-First flange ; 45-Second flange; 5-Bushing; 51-Hole wall portion; 52-Spiral portion; 521-End; 524-Guide portion; 525-Spiral flow channel; 5251-Spiral bottom; 5252-Spiral opening end; 6-Water distribution assembly; 61-Sealing ring; 62-Water distribution plate; 63-Bearing bracket; 7-Detection device; 8-Sealing component; 81-First sealing portion; Second sealing portion; 9-Transfer pipe; 91-Connecting portion; 911-First opening; 92-Mounting portion; 920-Channel; 921-Second channel; 922-First channel; 93-External connection portion; 931-Second opening; 94-Transfer channel; 95-Clamping portion; 951-Groove; 952-Notch; 96-Fixing component; 97-Step portion. Detailed Implementation

[0030] The embodiments will now be described with reference to the accompanying drawings.

[0031] Heat pumps are used in household appliances such as dishwashers. They provide power to the dishwasher's circulation system and heat the water flow for high-temperature washing, thus meeting the dishwasher's washing needs.

[0032] Please refer to Figure 1 and Figure 2 As shown, the heating pump according to an embodiment of this application includes a motor assembly 1, a pump housing 2, an impeller 3, a heating assembly 4, a detection device 7, and a transfer pipe 9.

[0033] Please refer to Figure 2 and Figure 3As shown, the heating pump includes a rotating shaft 11, which is connected to an impeller 3. The motor assembly 1 can drive the impeller 3 to rotate via the rotating shaft 11, that is, the motor assembly 1 provides power for the rotation of the impeller 3. The pump casing 2 includes a water inlet 21, a water outlet 22, a pump chamber bottom 231, and a pump chamber wall 232. The water inlet 21 is connected to the pump chamber bottom 231, and the water outlet 22 is connected to the pump chamber bottom wall 232. The water inlet 21 is provided with a water inlet channel 211, and the water outlet 22 is provided with a water outlet channel 221. The pump casing 2 also has a pump chamber 23. Both the water inlet channel 211 and the water outlet channel 221 are through holes. Part of the rotating shaft 11 is placed inside the pump chamber 23, and the impeller 3 is housed inside the pump chamber 23. The rotating shaft 11 drives the impeller 3 to rotate, so that water enters the pump chamber 23 from the water inlet channel 211 of the water inlet section 21, and the rotation of the impeller 3 drives the water to be discharged from the pump chamber 23 from the pump chamber 23 along the water outlet channel 221 of the water outlet section 22.

[0034] The heating pump includes a bushing 5 and a water distribution assembly 6. The motor assembly 1 is mounted on the water distribution assembly 6. The water distribution assembly 6 reduces the possibility of water leakage from the connection between the pump housing 2 and the water distribution assembly 6. The bushing 5 is snapped and fixed to the pump housing 2 and is located inside the pump chamber 23. The pump housing 2 and the water distribution assembly 6 are snapped and fixed, and the pump housing 2 and the water distribution assembly 6 are sealed together. The water distribution assembly 6 includes a sealing ring 61, a water distribution plate 62, and a bearing bracket 63. In the axial direction of the heating pump, the bushing 5 and the water distribution plate 62 press against the sealing ring 61 to seal. In the radial direction of the sealing ring 61, the pump housing 2 and the water distribution plate 62 press against the sealing ring 61 to seal.

[0035] The water inlet 21 includes a main body 212, which extends from the bottom 231 of the pump chamber towards the impeller 3. The main body 212 is located inside the pump chamber 23. The heating component 4 includes a heating tube 41, which includes a bent section 413. The bent section 413 is located inside the pump chamber 23 and is wound around the main body 212. The impeller 3 and the main body 212 are fitted with a clearance. The impeller 3 includes an impeller inlet 32 ​​and an impeller outlet 31. The impeller inlet 32 ​​is directly connected to the water inlet channel 211, and the impeller outlet 31 is directly connected to the pump chamber 23. The other end of the water inlet channel is connected to an external water inlet pipe. In the axial direction of the heating pump, the bushing 5 is located above the sealing ring 61, the impeller outlet 31 is located above the bushing 5, the heating component 4 is located above the bushing 5, the heating component 4 is located above the impeller 3, and the motor assembly 1 is located below the bushing 5, so that the impeller outlet 31 and the heating component 4 are located on one side of the bushing 5, the motor assembly 1 is located on the other side of the bushing 5, and the lower end of the bushing 5 abuts against the water distribution component 6.

[0036] Please refer to Figure 4 and Figure 8As shown, the adapter pipe 9 includes a connecting part 91, a mounting part 92, and an external connection part 93. The detection device 7 includes a pressure switch. The connecting part 91 is fixedly connected to the water outlet part 22, the mounting part 92 is sealed and fixedly connected to the pressure switch, and the pressure switch is electrically connected to the heating assembly 4. The external connection part 93 is connected to the outside world. The axis of the connecting part 91 and the axis of the external connection part 93 are collinear or parallel, and the axis of the mounting part 92 is perpendicular to the axis of the connecting part 91.

[0037] Please refer to Figure 4 and Figure 9 As shown, the adapter pipe 9 includes an adapter channel 94, a connecting part 91 includes a first opening 911, a mounting part 92 includes a channel 920, the channel 920 includes a first channel 922 and a second channel 921, and an external part 93 includes a second opening 931. The first opening 911 and the second opening 931 are connected through the adapter channel 94. The second channel 921 and the adapter channel 94 are connected through the first channel 922. The diameter of the first channel 922 is smaller than the diameter of the second channel 921. The relatively larger diameter of the second channel 921 facilitates the installation of the pressure switch. The relatively smaller diameter of the first channel 922 reduces the hydraulic loss of the fluid in the connecting channel 94. The axis of the connecting channel 94 intersects the axis of the first channel 922 at an angle between 80° and 100°. If the angle is 90°, then the axis of the connecting channel 94 and the axis of the first channel 922 are perpendicular. The adapter pipe 9 and the water outlet 22 are fixedly connected or limitedly connected. The water outlet channel 221 is connected to the adapter channel 94, and the other end of the water outlet channel 221 is connected to the pump chamber 23. The first channel 922 and the water outlet channel 221 are connected through the adapter channel 94. Driven by the impeller 3, the water flows from the water outlet channel 221 into the adapter channel 94, and then from the adapter channel 94 into the first channel 922. Since the pressure switch is installed in the mounting part 92, the pressure switch detects the water pressure in the first channel 922. When the water pressure detected by the pressure switch is lower than the set value, and the heating component 4 is still working, the pressure switch activates to shut off the heating component 4, reducing the occurrence of dry burning of the heating pump and improving the safety of the heating pump.

[0038] Please refer to Figure 5 and Figure 6As shown, one end of the water outlet 22 is connected to the pump chamber wall 232, and the other end is connected to the transfer pipe 9. The water outlet 22 includes a water outlet end 223, which is located at the end of the water outlet 22 away from the pump chamber wall 232. The water outlet end 223 is fixedly connected to the connecting part 91. The heating pump also includes a sealing component 8, which can be a sealing ring or sealing tape, etc. The sealing ring is made of soft rubber and is elastic. The sealing ring is installed on the water outlet end 223 and surrounds the outer periphery of the water outlet end 233. The sealing ring is limited or fixedly connected to the water outlet end 223. The sealing ring is located between the water outlet end 223 and the connecting part 91. The sealing ring abuts against the water outlet end 223 and the connecting part 91. The sealing ring is limited or fixedly connected to the connecting part, which reduces water leakage between the transfer pipe 9 and the pump casing 2, and also reduces the impact of vibration during the operation of the heating pump on the transfer pipe 9. In its natural state, the inner diameter of the sealing ring is smaller than the outer diameter of the water outlet end 223. When the sealing ring is installed on the water outlet end 223, the inner diameter of the sealing ring becomes larger. Under the action of the sealing ring's own elasticity, the sealing ring exerts pressure on the water outlet end 223, causing the sealing ring to abut against the water outlet end 223 and fix the sealing ring to the water outlet end 223.

[0039] The connecting part 91 includes a clamping part 95, which is located axially in the transition channel 94 at the end of the connecting pipe 9 away from the external connection part 93. The inner diameter of the clamping part 95 is larger than the outer diameter of the water outlet end 223, which facilitates the installation of the clamping part 95 on the water outlet end 223. The sealing member 8 is located between the clamping part 95 and the water outlet end 223, and the sealing member 8 abuts against the clamping part 95, which improves the stability of the installation of the connecting part 91, the sealing member 8 and the water outlet end 223, and extends the service life of the heat pump.

[0040] like Figure 5 and Figure 7As shown, the clamping part 95 includes a groove 951 and a notch 952. The groove 951 is located on the outer periphery of the clamping part 95 and is axially arranged along the outer periphery of the clamping part 95. The notch 952 is located in the radial direction of the clamping part 95. There are at least two notches 952, and there can be six, twelve, etc. The heating pump includes a fixing member 96, which can be a clamp or a retaining ring, etc. The fixing member 96 is at least partially accommodated in the groove 951. The fixing member 96 abuts against the bottom wall of the groove 951, which reduces the possibility of the fixing member 96 moving in the axial direction of the clamping part 95, reduces the possibility of the fixing member 96 falling off in the axial direction of the clamping part 95, and improves the stability of the fixing member 96. Due to the presence of the notch 952, the clamping part 95 can be radially narrowed inwards. The fixing member 96 clamps the clamping part 95 towards the water outlet end 223. That is, the inner diameter of the clamping part 95 in its natural state is larger than the inner diameter of the clamping part 95 when fixed by the fixing member 96. The contact force between the clamping part 95 and the sealing member 8 is greater, thereby improving the stability of the clamping part 95, the sealing member 8, and the water outlet end 223. The sealing member 8 is partially housed in the transition channel 94, and the water outlet end 223 is at least partially housed in the transition channel 94. The sealing member 8 partially abuts against the clamping part 95, improving the stability between the sealing member 8 and the transition pipe 9. The sealing member 8 partially abuts against the connecting part 91, improving the sealing performance between the sealing member 8 and the transition pipe 9.

[0041] Please refer to Figure 7As shown, the water outlet end 223 includes a threaded protrusion 2231, which is located on the outer periphery of the water outlet end 223. The threaded protrusion 2231 abuts against the sealing member 8. The threaded protrusion 2231 increases the friction between the water outlet end 223 and the sealing member 8, reduces the possibility of the sealing member 8 falling off along the axial direction of the water outlet end 223, and improves the stability of the sealing member 8. The sealing member 8 is provided with a threaded groove, which is adapted to the threaded protrusion 2231. The threaded protrusion 2231 is at least partially accommodated in the threaded groove. The cooperation between the threaded protrusion 2231 and the threaded groove improves the sealing effect between the sealing member 8 and the water outlet end 223. The sealing component 8 includes a first sealing portion 81 and a second sealing portion 82. The first sealing portion 81 is located in the radial direction of the water outlet end 223, and the second sealing portion 82 is located in the axial direction of the water outlet end 233. The adapter pipe 9 includes a stepped portion 97, which abuts against the second sealing portion 82 and is connected to the connecting portion 91, such that the connecting portion 91 is located between the clamping portion 95 and the stepped portion 97. In the radial direction of the water outlet end 223, the outer wall portion of the first sealing portion 81 abuts against the clamping portion 95 and the connecting portion 91, and the inner wall of the first sealing portion 81 abuts against the water outlet end 223. In the axial direction of the water outlet end 223, the outer wall of the second sealing portion 82 abuts against the stepped portion 97, and the inner wall of the second sealing portion 82 abuts against the water outlet end 223, so that the sealing component 8 and the adapter pipe 9 have radial and axial seals, improving the sealing effect between the sealing component 8 and the adapter pipe 9.

[0042] Please refer to Figure 2 and Figure 12As shown, the heating tube 41 includes a first straight segment 411, a second straight segment 412, and a curved segment 413. The first straight segment 411 and the second straight segment 412 are partially located inside the pump chamber 23, and partially located outside the pump housing 2. The curved segment 413 is located inside the pump chamber 23 and contains a heating wire; that is, the curved segment 413 is the heating segment. The curved segment 413 surrounds the main body 212, meaning that in the radial direction of the main body 212, the outer wall of the main body 212 is opposite to the pump chamber wall 232 corresponding to the pump chamber 23. The curved segment 413 is accommodated in the space between the outer wall of the main body 212 and the inner wall 232 of the pump housing. The height of the curved segment 413 along the axial direction of the main body 212 is less than the length of the main body 212. The distance between the curved section 413 and the pump housing 2 perpendicular to the axis of the main body 212 is L1, with a value ranging from 50mm to 80mm. The distance between the curved section 413 and the main body 212 perpendicular to the axis of the main body 212 is L3, with a value ranging from 50mm to 80mm. The distance between the curved section 413 and the pump housing 2 perpendicular to the axis of the main body 212 is L2, with a value ranging from 60mm to 90mm. For example, L1 is 67mm, L2 is 74mm, and L3 is 69mm. The curved section 413 and the pump housing 2 are spaced apart. With a fixed overall size of the heating pump, this ensures a safe distance between the curved section 413 and the pump housing 2, reducing the possibility of the pump housing 2 being damaged by the curved section 413 and improving the service life of the heating pump.

[0043] The curved section 413 includes a first curved section 4131, a second curved section 4132, and a connecting section 4133. The first curved section 4131 and the second curved section 4132 are both wound around the main body 212, that is, the first curved section 4131 and the second curved section 4132 are both located in the space between the outer wall of the main body 212 and the inner wall 232 of the pump casing. The heating tube 41 includes a first straight section 411 and a second straight section 412. One end of the first curved section 4131 is connected to one end of the first straight section 411, and the other end of the first curved section 4131 is connected to one end of the connecting section 4133. One end of the second curved section 4132 is connected to one end of the second straight section 412, and the other end of the second curved section 4132 is connected to the other end of the connecting section 4133. The first curved section 4131 surrounds the main body 212, and the plane containing the first curved section 4131 is perpendicular to the axis of the main body 212. The second curved section 4132 surrounds the main body 212, and the plane containing the second curved section 4132 is perpendicular to the axis of the main body 212. The plane containing the connecting section 4133 is parallel to the axis of the main body 212. In the axial direction of the heating pump, the first curved section 4131 is located below the connection between the main body 212 and the pump casing 2, and the second curved section 4132 is located above the connection between the main body 212 and the impeller 3. The curved section 413 is located away from the impeller 3, which reduces the impact of the high-pressure, high-speed water flow generated by the rotation of the impeller 3 on the curved section 413. The curved section 413, located above the impeller 3, has a slower contact with the water flow, which prolongs the contact time between the heater and the water flow and improves the heating efficiency. The double-layered curved section 413 increases the contact area between the heating tube 41 and the water flow in the pump chamber 23, thereby improving heating efficiency. The position of the heating tube 41 in the pump chamber 23 improves the rationality of the spatial structure within the pump chamber 23. The connecting section 4133 allows the first curved section 4131 and the second curved section 4132 to be arranged in layers along the axial direction of the heating pump. This reduces the mutual influence between the first curved section 4131 and the second curved section 4132 during heating due to their close proximity, thus improving heating efficiency. It also reduces the radial width of the heating pump, thereby improving the rationality of the pump size design.

[0044] The heating assembly 4 includes a seal 42, a bolt 43, a first flange 44, and a second flange 45. The pump housing 2 includes a fixing part 26. The seal 42 and the first flange 44 are located inside the pump chamber 23. The first flange 44 is welded and fixed to the first straight segment 411 and the second straight segment 412, respectively. The second flange 45 is located outside the pump chamber. The seal 42 and the fixing part 26 are located between the first flange 44 and the second flange 45. One end of the bolt 43 is welded and fixed to the first flange 44, and the other end of the bolt 43 is screwed and fixed to the second flange 45. The fixing part 26 is also provided with a through hole through which the bolt 43, the first straight segment 411, and the second straight segment 412 all pass. This means that each of the bolt 43, the first straight segment 411, and the second straight segment 412 is partially located inside the pump chamber 23 and partially extends outside the pump chamber 23. By tightening the nut on the fixing part 43, the first flange 44 and the second flange 45 clamp the seal 42 and the fixing part 26, thereby achieving fixation and sealing between the pump housing 2 and the heating assembly 4.

[0045] Please refer to Figure 10 and Figure 11 As shown, the bushing 5 includes a bore wall portion 51, a spiral portion 52, an end portion 521, and a guide portion 524. In the axial direction of the bushing 5, the bore wall portion 51 abuts against the bearing bracket 63, the spiral portion 52 is disposed opposite to the bottom 231 of the pump chamber, and the spiral portion 52 is disposed circumferentially along the outer periphery of the bore wall portion 51. The spiral portion 52 extends radially along the side wall of the bore wall portion 51 and surrounds the bore wall portion 51. In the axial direction of the bushing 5, the upper end face of the end portion 521 is flush with the upper end face of the bore wall portion 51. The end portion 521 extends radially outward along the side wall of the bore wall portion 51. The impeller outlet 31 is located on the side of the end portion 521 facing the heating assembly 4. The impeller outlet 31 is close to the end portion 521, and all of the impeller outlets 31 are located above the end portion 521. Both the spiral part 52 and the guide part 524 are wound around the hole wall part 51. In the rotation direction of the impeller 3, one end of the spiral part 52 is connected to the end part 521, the other end of the spiral part 52 is connected to the guide part 524, the other end of the guide part 524 is connected to the end part 521, and the guide part 524 is adapted to the water outlet part 22.

[0046] The bushing 5 includes a spiral flow channel 525, a portion of which is located on the spiral section 52, and another portion of which is located on the guide section 524. The spiral flow channel 525 faces the bottom 231 of the pump chamber. The spiral section 52 includes a spiral bottom 5251 and a spiral opening end 5252. In the radial direction of the bushing 5, the distance between the spiral opening end 5252 and the bottom 231 of the pump chamber is L4, and the distance between the spiral bottom 5251 and the bottom 231 of the pump chamber is L5. L4 is less than L5, that is, the distance between the spiral opening end 5252 and the bottom 231 of the pump chamber is less than the distance between the spiral bottom 5251 and the bottom 231 of the pump chamber. This makes the spiral section 52 radially raised at both ends and concave in the middle. The portion of the spiral flow channel 525 on the spiral section 52 is grooved, which facilitates the flow of water along the spiral flow channel 525. Similarly, the portion of the spiral flow channel 525 on the guide section 524 is also grooved. The distance between the connection point of end portion 521 and spiral portion 52 and the bottom 231 of the pump chamber is less than the distance between the connection point of spiral portion 52 and guide portion 524 and the bottom 231 of the pump chamber, and the distance between the connection point of guide portion 524 and end portion 521 and the bottom 231 of the pump chamber is less than the distance between the connection point of spiral portion 52 and guide portion 524 and the bottom 231 of the pump chamber. In the rotation direction of impeller 3, the distance between spiral portion 52 and bottom 231 of the pump chamber gradually increases from the connection point with end portion 521 to the connection point with guide portion 524, resulting in a gradual change in the distance between spiral portion 52 and bottom 231 of the pump chamber; the distance between guide portion 524 and bottom 231 of the pump chamber gradually decreases from the connection point with spiral portion 52 to the connection point with end portion 521, resulting in a gradual change in the distance between guide portion 524 and bottom 231 of the pump chamber. Because the pump chamber 23 is variable in the axial direction, that is, the cross-sectional area of ​​the water flow in the axial direction is variable, the conversion efficiency of the water flow from kinetic energy to pressure energy is increased, thereby increasing the pressure of the water flowing out of the outlet channel 221 and improving the hydraulic effect.

[0047] This application also proposes a dishwasher, which includes a body, a circulation system and a heating pump as described in the above embodiment. The body includes an inner tank and a water cup, the circulation system is connected to the inner tank and the water cup, and the heating pump provides power to the circulation system.

[0048] In some embodiments, the pump housing 2 is a plastic part, which can be integrally injection molded. The sealing component 8 is made of soft rubber and can be heat-fused to the water outlet end 223, so that the sealing component 8 and the pump housing 2 are integrally molded, which improves the stability and sealing performance of the sealing component 8 and the water outlet end 223. The adapter pipe 9 is a plastic part, and the sealing component 8 can also be heat-fused to the connection part 91 and the step part 97 of the adapter pipe 9, which facilitates the installation of various components and improves production efficiency.

[0049] In some embodiments, the portion of the water inlet 21 located outside the pump chamber 23 is connected to the sealing member 8. The portion of the water inlet 21 connected to the sealing member 8 is away from the bottom wall 231 of the pump chamber. The water inlet 21 and the sealing member 8 are limited or fixedly connected. The sealing member 8 may also be integrally formed with the water inlet 21. The connecting portion 91 is limited or fixedly connected to the sealing member 8. The sealing member 8 is at least partially located between the connecting portion 91 and the water outlet 22, and the sealing member 8 abuts against the connecting portion 91 and the water outlet 22. This abuts against the connecting portion 91 and the sealing member 8, which improves the sealing performance between the transfer pipe 9 and the pump housing 2 and reduces the impact of vibration during the operation of the heating pump on the transfer pipe 9.

[0050] In the description of this application, "a plurality of" means at least two, such as two or three, unless otherwise explicitly specified. The use of terms such as "an embodiment," "some embodiments," or "specific example" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above" or "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below" or "below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

Claims

1. A heating pump, comprising a motor assembly (1), a pump housing (2), an impeller (3) and a heating assembly (4), characterized in that, the pump housing (2) comprises a water inlet part (21) and a water outlet part (22), the water inlet part (21) is provided with a water inlet channel (211), the water outlet part (22) is provided with a water outlet channel (221), the heating pump further has a pump cavity (23), the impeller (3) is placed in the pump cavity (23), the heating assembly (4) is at least partially accommodated in the pump cavity (23), the water inlet channel (211) is in communication with the pump cavity (23), and the water outlet channel (221) is in communication with the pump cavity (23); the heating pump comprises a detection device (7) and an adapter pipe (9), the adapter pipe (9) is directly or indirectly fixed with the water inlet part (21) or the water outlet part (22), the adapter pipe (9) comprises a mounting part (92), the mounting part (92) comprises a hole (920), the adapter pipe (9) comprises an adapter channel (94), the adapter channel (94) is in communication with the water inlet channel (211) or the water outlet channel (221), and the detection device (7) is mounted on the mounting part (92) and part of the detection device (7) is located in the hole (920), so that the detection device (7) can detect the fluid pressure flowing through the adapter channel (94); the adapter pipe (9) comprises a clamping part (95) and a connecting part, the clamping part (95) is located at one end of the adapter pipe (9), one end of the clamping part (95) is connected with the connecting part (91), in the axial direction of the connecting part (91), the other end of the clamping part (95) extends away from the mounting part (92), the heating pump comprises a sealing member (8), part of the sealing member (8) is located between the clamping part (95) and the water outlet part (22), and the clamping part (95) is fixedly connected with the sealing member (8); the clamping part (95) has a groove (951) and a notch (952), the outer peripheral wall of the clamping part (95) is recessed inwardly and forms the groove, and the notch (952) penetrates the wall part of the clamping part (95) in the radial direction of the clamping part (95); the heating pump comprises a fixing member (96), the fixing member (96) is sleeved on the outer peripheral part of the clamping part (95), at least part of the fixing member (96) is accommodated in the groove (951), the fixing member (96) and the clamping part (95) abut each other, and the fixing member (96) causes the clamping part (95) to be necked in the direction of the water outlet part (22) along the radial direction of the clamping part (95).

2. The heat pump of claim 1, wherein, The adapter pipe (9) comprises a connecting portion (91) fixedly connected with the water inlet portion (21), the sealing component (8) is located at least partially between the connecting portion (91) and the water inlet portion (21), and the sealing component (8) is in contact with the connecting portion (91) and the water inlet portion (21); or the connecting portion (91) is fixedly connected with the water outlet portion (22), the sealing component (8) is located at least partially between the connecting portion (91) and the water outlet portion (22), and the sealing component (8) is in contact with the connecting portion (91) and the water outlet portion (22).

3. The heat pump of claim 2, wherein, The adapter pipe (9) comprises a step portion (97) connected with the connecting portion (91), the connecting portion (91) is located between the step portion (97) and the clamping portion (95), the sealing component (8) comprises a first sealing portion (81) and a second sealing portion (82), the water outlet portion (22) comprises a water outlet end portion (223) located at an end of the water outlet portion (22) away from the impeller (3), in the radial direction of the water outlet end portion (223), the first sealing portion (81) is located partially between the water outlet end portion (223) and the connecting portion (91), the first sealing portion (81) is in abutment with the water outlet end portion (223), a part of the first sealing portion (81) is in abutment with the clamping portion (95), and a part of the first sealing portion (81) is in abutment with the connecting portion (91); in the axial direction of the water outlet end portion (223), the second sealing portion (82) is located between the second sealing portion (82) and the water outlet end portion (223), and the second sealing portion (82) is in abutment with the water outlet end portion (223) and the step portion (97).

4. The heat pump according to claim 1 or 2 or 3, characterized in that The hole (920) comprises a first hole (922) and a second hole (921), the first hole (922) and the second hole (921) are communicated, the diameter of the first hole (922) is smaller than the diameter of the second hole (921), and the detection device (7) is installed at the second hole (921) of the mounting portion (92); The sealing component (8) is a rubber part, the pump shell (2) is a plastic part, the adapter pipe (9) is a plastic part, the axis of the second hole (921) is perpendicular to the axis of the adapter channel (94), the sealing component (8) and the pump shell (2) are integrally formed; or the sealing component (8) and the adapter pipe (9) are integrally formed.

5. The heat pump of claim 1, wherein, The heating assembly (4) comprises a heating pipe (41), the heating pipe (41) comprises a bending section (413), the water inlet part (21) comprises a main body part (212), the main body part (212) is located in the pump cavity (23), the main body part (212) protrudes from the bottom (231) of the pump cavity (23) corresponding to the pump cavity (23), the distance between the bending section (413) and the main body part (212) is between 50mm and 80mm, the bending section (413) comprises a first bending section (4131), a second bending section (4132) and a connecting section (4133), the first bending section (4131) and the second bending section (4132) are arranged side by side, and both are accommodated in the space between the outer wall of the main body part (212) and the inner wall (232) of the pump shell (2) corresponding to the pump cavity (23), the heating assembly (4) comprises a sealing element (42), a fixing element (43), a first flange (44) and a second flange (45), the pump shell (2) comprises a fixing part (26), the heating pipe (41) comprises a first straight section (411) and a second straight section (412), one end of the first bending section (4131) is connected with one end of the first straight section (411), the other end of the first bending section (4131) is connected with one end of the connecting section (4133), one end of the second bending section (4132) is connected with one end of the second straight section (412), the other end of the second bending section (4132) is connected with the other end of the connecting section (4133), part of the first straight section (411) and part of the second straight section (412) are located outside the pump cavity (23), the sealing element (42) and the first flange (44) are located in the pump cavity (23), the first flange (44) is fixedly connected with the first straight section (411) and the second straight section (412) respectively, the second flange (45) is located outside the pump cavity (23), the sealing element (42) and the fixing part (26) are located between the first flange (44) and the second flange (45), the fixing element (43) is connected with the first flange (44) and the second flange (45) respectively, the fixing element (43) is used for fixing the first flange (44) and the second flange (45) to clamp the sealing element (42) and the fixing part (26).

6. The heat pump according to claim 1 or 2 or 3 or 5, characterized in that, The heating pump further comprises a bushing (5), the bushing (5) is fixedly connected or limitingly connected with the pump shell (2), at least a part of the bushing (5) is located in the pump cavity (23), the impeller outlet (31) of the impeller is located on the side of the bushing (5) away from the motor assembly (1), the bushing (5) comprises a spiral part (52), the spiral part (52) is located on the side of the bushing (5) away from the motor assembly (1).

7. A dishwasher, characterized in that A machine body, a circulating system and a heating pump according to any one of claims 1 to 6, the machine body comprising an inner container and a water cup, the circulating system connecting the inner container and the water cup, the heating pump powering the circulating system.

Images