CN110552893A

CN110552893A - heating pump and dish washer or washing machine with same

Info

Publication number: CN110552893A
Application number: CN201910827545.2A
Authority: CN
Inventors: 胡小文; 胡斯特; 戴龙珍; 谭发刚; 刘日超
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2019-12-10

Abstract

The invention discloses a heating pump and a dish washer or washing machine with the same, wherein the heating pump comprises: a drive motor; the pump comprises a pump shell, a pump cavity and a heating cavity, wherein the pump cavity and the heating cavity are approximately arranged side by side in the axial direction, the pump cavity and the heating cavity are suitable for being communicated through a communication passage, and a water inlet communicated with the pump cavity and a water outlet communicated with the heating cavity are formed in the pump shell; the impeller is arranged in the pump cavity and connected with a motor shaft of the driving motor; the heating member is arranged in the heating cavity. According to the heating pump, the pump cavity is arranged in parallel with the heating cavity in the axial direction, the impeller is arranged in the pump cavity, and the heating cavity is communicated with the pump cavity through the communication channel, so that the size of the heating pump is reduced, the high-temperature radiation of the heating element to the impeller can be avoided, the premature aging phenomenon of the impeller can be prevented, and the service performance of the heating pump can be improved.

Description

Heating pump and dish washer or washing machine with same

Technical Field

The invention relates to the field of household appliances, in particular to a heating pump and a dish washing machine or a washing machine with the heating pump.

Background

In the related art, the technical solutions of the washing machine and the dishwasher are to place a heating pipe or a thick film in a volute of a water pump. Firstly, the dishwasher pump with the heating pipe arranged in the pump shell is often characterized by large volume, and because the requirement of thermal safety is considered, the heating pipe and the pump shell are usually kept a larger distance, so that the outer diameter of the pump shell is increased, and the effective volume ratio is usually considered, the water pump is often required to be installed with smaller height, and certain contradiction exists between the existing scheme and the design requirement of the large volume ratio of the dishwasher or washing machine.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the invention is to propose a heat pump whose volume is reduced.

Another object of the present invention is to provide a dishwasher including the above-mentioned heat pump.

a further object of the present invention is to propose a washing machine comprising a heat pump as described above.

A heat pump according to an embodiment of the first aspect of the present invention includes: a drive motor; the pump comprises a pump shell, a pump cavity and a heating cavity, wherein the pump cavity and the heating cavity are approximately arranged side by side in the axial direction, the pump cavity and the heating cavity are suitable for being communicated through a communication passage, and a water inlet communicated with the pump cavity and a water outlet communicated with the heating cavity are formed in the pump shell; the impeller is arranged in the pump cavity and connected with a motor shaft of the driving motor; the heating member is arranged in the heating cavity.

according to the heating pump provided by the embodiment of the invention, the pump cavity is approximately axially arranged side by side with the heating cavity, the impeller is arranged in the pump cavity, and the heating cavity is communicated with the pump cavity through the communication channel, so that the size of the heating pump is favorably reduced, the high-temperature radiation of the heating element to the impeller can be avoided, the premature aging phenomenon of the impeller can be prevented, and the service performance of the heating pump can be improved.

In addition, the heat pump according to the above embodiment of the present invention has the following additional technical features:

According to some embodiments of the invention, the communication passage is configured to extend in a tangential direction of an inner wall surface of the pump casing.

Further, in the flow direction of the water flow, the communication passage is configured as an expanding passage, and an expanding angle of the expanding passage is not more than 20 degrees.

According to some embodiments of the invention, the pump chamber comprises, in the flow direction of the water flow: the expansion channel is formed between the water pump volute and the heating cavity.

In some embodiments of the invention, an outlet connecting pipe communicated with the heating cavity is arranged on the pump shell, and a free end of the outlet connecting pipe forms the water outlet.

Further, the outlet nozzle is configured to extend tangentially to an outer side wall of the heating chamber.

Further, a first installation groove is formed in the bottom of the heating cavity, and a first sealing element is arranged in the first installation groove.

According to some embodiments of the invention, the heating member is a heat generating pipe extending spirally, and a direction of the spiral of the heat generating pipe is configured to coincide with a flow direction of the water current.

In some embodiments of the present invention, the heating element is a thick film provided on an inner wall surface of the heating chamber.

According to some embodiments of the present invention, the inner wall surface of the heating chamber is provided with a flow guide rib, and an extending direction of the flow guide rib is configured to be identical to a flowing direction of the water flow.

According to some embodiments of the invention, the motor shaft has an external thread formed thereon, the impeller has an internal thread formed thereon, the external thread and the internal thread are matched to screw-connect the motor shaft and the impeller, and the rotation direction of the external/internal thread is opposite to the rotation direction of the driving motor.

according to some embodiments of the invention, the heat pump further comprises: the end cover is formed with the water inlet and is connected with the pump shell in a sealing mode.

Further, the end cap includes: a second sealing element is arranged between the water inlet end cover and the pump shell; a third sealing element is arranged between the water outlet end cover and the pump shell; the water inlet end cover is provided with a matching groove, the pump shell is provided with a matching part matched with the matching groove, the matching part is provided with a second mounting groove suitable for mounting the second sealing element, and the water outlet end cover is provided with a third mounting groove suitable for mounting the third sealing element.

In some embodiments of the present invention, the inner side of the end cap defines, in a flow direction of the water flow, a water inlet passage, a water rectifying passage, and a fitting passage, a water inlet end of the water inlet passage forms the water inlet, and the impeller is provided at the fitting passage and is disposed spaced apart from an inner wall surface of the fitting passage to define a return passage adapted to return the water flow between the impeller and the fitting passage.

Further, the outer wall surface of the water inlet channel is formed with a sealing protrusion to connect with a water inlet hose.

In some embodiments of the present invention, an inner wall surface of the rectifying passage is configured in a shape gradually contracting in radial dimension in a flow direction of the water current.

Further, the inner wall surface of the rectifying passage is configured to be tapered or curved.

The dishwasher according to the second aspect of the embodiment of the present invention includes the above-described heat pump.

the washing machine according to the third aspect of the present invention includes the above-described heat pump.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a heat pump according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1;

FIG. 5 is a cross-sectional view taken along line D-D of FIG. 1;

FIG. 6 is another schematic view of the heat pump of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 7 is yet another schematic view of the heat pump of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 8 is a cross-sectional view taken along line E-E of FIG. 7;

FIG. 9 is a cross-sectional view taken along line F-F of FIG. 7;

FIG. 10 is yet another schematic view of the heat pump of FIG. 1 in accordance with an embodiment of the present invention;

Fig. 11 is a perspective view of a pump case in the heat pump of fig. 1 according to the embodiment of the present invention;

FIG. 12 is another perspective view of a pump housing of the heat pump of FIG. 1 according to an embodiment of the present invention;

FIG. 13 is a schematic view of a pump housing of the heat pump of FIG. 1 according to an embodiment of the present invention;

FIG. 14 is another schematic view of a pump housing of the heat pump of FIG. 1 according to an embodiment of the present invention;

FIG. 15 is a sectional view taken along line G-G of FIG. 14;

FIG. 16 is a sectional view taken along line H-H in FIG. 14;

FIG. 17 is still another schematic illustration of a pump housing of the heat pump of FIG. 1 according to an embodiment of the present invention;

FIG. 18 is a sectional view taken along line I-I of FIG. 17;

FIG. 19 is a cross-sectional view taken along line J-J of FIG. 17;

FIG. 20 is a perspective view of an end cap of the heat pump of FIG. 1 according to an embodiment of the present invention;

Fig. 21 is a cross-sectional view of the end cap of the heat pump of fig. 20 according to an embodiment of the present invention.

Reference numerals:

The pump 100 is heated up and the heat is removed,

The drive motor 1, the motor shaft 11,

A pump case 2, a pump chamber 21, an inlet connection section 211, a water pump volute 212, a heating chamber 22, a connection terminal 221, a first mounting groove 212, a communication passage 23, a water outlet 24, an outlet connection pipe 25, a fitting part 26, a second mounting groove 261,

The impeller 3, the heating member 4,

an end cover 5, a water inlet 51, a water inlet end cover 52, a matching groove 521, a water outlet end cover 53, a third mounting groove 531, a water inlet channel 54, a sealing bulge 541, a rectifying channel 55, a matching channel 56,

A return channel 9.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the related art, a dishwasher has been invented for about 100 years since now, and its main function is to automatically wash tableware. Generally, the dishwasher has functions of washing, sterilizing, drying, etc., and in order to melt and sterilize oil effectively, it is necessary to heat the water temperature of the washing water to about 72 ℃, and therefore, a heating device needs to be separately added to a water pump or the bottom space of other dishwashers. The increasingly compact design of modern dishwashers often requires that the pump and the heating device are integrated into one structure, resulting in a structural requirement for the heating pump.

The solutions in the related art have the following disadvantages: first, bulky: because the requirement of considering thermal safety usually leaves great distance with the pump case for the heating tube, consequently caused the external diameter increase of pump case, and dishwasher usually considers effective volume rate, often requires the water pump to install less height, and there is certain contradiction in this kind of scheme and the direction of dishwasher to big volume rate. Secondly, the existing scheme of heating in the pump shell is that the heating pipe, the plastic impeller and the volute are close in distance and have no isolation, and the water pump impeller and the volute are easy to age under the action of thermal radiation. Thirdly, the heating pipe of the existing scheme is often unlikely to the rear part of the impeller, and water flow is often radial to the wall surface of the pump shell, so that the flow velocity on the surface of the heating pipe is low easily, the reynolds number on the surface of the heating pipe is too low, and the phenomenon of insufficient surface heat exchange is generated.

A heat pump 100 according to an embodiment of the present invention is described below with reference to the drawings. An outlet heating device is arranged on the heating pump 100.

Referring to fig. 1, a heat pump 100 according to an embodiment of the first aspect of the present invention includes: a drive motor 1, a pump housing 2, an impeller 3, and a heating member 4.

Specifically, referring to fig. 2, 3, 4 and 11, the pump housing 2 defines a pump chamber 21 and a heating chamber 22 communicating with the pump chamber 21, the pump chamber 21 and the heating chamber 22 are arranged side by side in a substantially axial direction, the pump chamber 21 and the heating chamber 22 are adapted to communicate with each other through a communication passage 23, and the pump housing 2 is formed with a water inlet 51 communicating with the pump chamber 21 and a water outlet 24 communicating with the heating chamber 22.

for example, a pump chamber 21 and a heating chamber 22 may be defined in the pump housing 2, the heating chamber 22 may be provided in communication with the pump chamber 21, the pump chamber 21 and the heating chamber 22 are arranged generally axially side by side, the axis of the pump chamber 21 is parallel to the axis of the heating chamber 22, and the axis of the pump chamber 21 and the axis of the heating chamber 22 may be provided spaced apart. This corresponds to a reduction in the overall height of the heat pump 100, thereby facilitating a reduction in the volume of the heat pump 100.

in some embodiments of the present invention, the pump chamber 21 and the heating chamber 22 may be communicated through a communication passage 23, and the pump housing 2 may be formed with a water outlet 24, and the water outlet 24 may be communicated with the heating chamber 22.

The impeller 3 is disposed in the pump chamber 21, and the impeller 3 is connected to the motor shaft 11 of the driving motor 1. For example, the impeller 3 may be, for example, a plastic member or the like, the impeller 3 may be, for example, a centrifugal impeller or the like, the impeller 3 may be provided in the pump chamber 21, and the impeller 3 may be connected to the motor shaft 11 of the drive motor 1. Thereby, the impeller 3 can be driven to rotate by the drive motor 1.

the heating element 4 may be disposed within the heating chamber 22. Thus, by providing the heating element 4 within the heating chamber 22, the flow of water through the heating chamber 22 can be heated.

According to the heat pump 100 of the embodiment of the present invention, the heating chamber 22 is substantially axially arranged side by side with the pump chamber 21 (the impeller 3 is disposed in the pump chamber 21), and the heating chamber 22 is connected to the pump chamber 21 through the communication passage 23, so that not only is the volume of the heat pump 100 reduced, but also the high temperature radiation of the heating element 4 to the impeller 3 is avoided, and therefore, the phenomenon that the impeller 3 is aged too early due to the heat radiation of the heating element 4 to affect the performance of the heat pump 100 does not occur.

Wherein, the water flow entering the pump cavity 21 from the water inlet 51 can further flow into the heating cavity 22 through the communication channel 23, and the water flow entering the heating cavity 22 can be heated by the heating element 4, so that the water flow heated by the heating element 4 can be output from the water outlet 24, and the requirement of the user can be better met.

According to the heating pump 100 of the embodiment of the invention, the pump cavity 21 is arranged approximately axially side by side with the heating cavity 22, the impeller 3 is arranged in the pump cavity 21, and the heating cavity 22 is communicated with the pump cavity 21 through the communication channel 23, so that the volume of the heating pump 100 is reduced, the high-temperature radiation of the heating element 4 to the impeller 3 is avoided, the premature aging of the impeller 3 can be prevented, and the service performance of the heating pump 100 can be improved.

Referring to fig. 16 and 18, according to some embodiments of the present invention, the communication passage 23 is configured to extend in a tangential direction of the inner wall surface of the pump casing 2. For example, in some embodiments of the invention, the communication passage 23 may be configured to extend in a tangential direction of the inner wall surface of the pump casing 2. Therefore, on one hand, the air bubbles sucked by the impeller 3 can be conveniently and smoothly guided into the heating cavity 22 without being gathered in the pump cavity 21, and the noise of the air bubbles is avoided. On the other hand, the water flow can be guided into the heating chamber 22 at a high speed and can be wound along the wall surface of the heating chamber 22, which facilitates the improvement of the heat exchange performance of the heating element 4.

Of course, in some alternative embodiments of the present invention, the communication channel 23 may also be disposed without extending tangentially, and the present invention does not limit the specific extending manner of the communication channel 23, and may be adaptively disposed according to the needs in practical applications.

further, referring to fig. 4 and 9, in the flow direction of the water flow, the communication passage 23 is configured as an expanding passage, and the expanding angle of the expanding passage is not more than 20 degrees. For example, in the flow direction of the water flow, the distance L is taken in two cross sections perpendicular to the flow direction of the water flow, wherein the equivalent diameter of the cross section on the upstream side is D1, and the equivalent diameter of the cross section on the downstream side is D2, there are: the expansion angle α is 2 × arctan (D2-D1)/L, i.e. the tangent of half of the expansion angle is equal to (D2-D1)/L.

Referring to fig. 15 and 16 in conjunction with fig. 14, according to some embodiments of the present invention, in the flow direction of the water flow, the pump chamber 21 includes: the inlet connecting section 211 and the water pump volute 212, and the expansion passage 23 is formed between the water pump volute 212 and the heating cavity 22. Therefore, by arranging an expansion channel between the heating cavity 22 and the water pump volute 212, the dynamic pressure at the outlet of the water pump volute 212 can be further recovered, the lift of the heating pump 100 is improved, and the reduction of the speed of entering the heating cavity 22 is beneficial to reducing the loss coefficient of water flow entering the heating cavity 22, so that the efficiency of the heating pump 100 can be improved.

Referring to fig. 2 in conjunction with fig. 1, in some embodiments of the invention, the pump housing 2 is provided with an outlet connection tube 25 communicating with the heating chamber 22, and a free end of the outlet connection tube 25 forms the water outlet 24. For example, the pump housing 2 may be provided with an outlet connection 25, the outlet connection 25 may be arranged in communication with the heating chamber 22, and a free end of the outlet connection 25 may form the water outlet 24. This facilitates the external connection of the line via the outlet connection 25, so that the water heated by the heating element 4 can flow further out of the water outlet 24 via the outlet connection 25.

Further, referring to fig. 3 and 5, the outlet nipple 25 is configured to extend tangentially to the outer side wall of the heating chamber 22. For example, in some alternative embodiments of the invention, the outlet nozzle 25 may be configured to extend tangentially to the outer side wall of the heating chamber 22. Therefore, the tangential outlet connecting pipe 25 and the tangential expansion channel are matched to form strong swirling flow at the inlet of the heating cavity, so that the effect of removing bubbles better is achieved.

According to the heat pump 100 of the embodiment of the present invention, the tangential outlet connection pipe 25 and the tangential expansion channel are matched to form a strong swirling flow at the inlet of the heat generating chamber, so that abnormal noise and dry burning caused by the accumulation of bubbles in the heat generating chamber 22 can be further prevented.

Of course, the invention is not limited thereto, and in some alternative embodiments of the invention, the outlet connection 25 may not extend tangentially along the outer side wall of the heating chamber 22, and may form a certain rotational flow.

Referring to fig. 2 in conjunction with fig. 1, according to some embodiments of the present invention, the heating cavity 22 is provided with a connection terminal 221 electrically connected to the heating element 4 for connecting an external power supply circuit. For example, the heating cavity 22 may be provided with a connection terminal 221, the connection terminal 221 may be electrically connected to the heating element 4, the connection terminal 221 may be provided on an outer side wall of the heating cavity 22, and the connection terminal 221 is convenient for connecting to an external power supply circuit, so as to further achieve heating of the water flow.

Further, referring to fig. 2 and 15, the bottom of the heating cavity 22 is formed with a first installation groove 212, and a first sealing member 6 is provided in the first installation groove 212. For example, the bottom of the heating cavity 22 may be formed with a first mounting groove 212, a first sealing member 6 may be disposed in the first mounting groove 212, and the first sealing member 6 may be, for example, a sealing ring or a sealing gasket, so that by disposing the first sealing member 6 in the first mounting groove 212, the sealing connection of the heating cavity 22 may be achieved, and water leakage from the heating cavity 22 may be prevented.

Referring to fig. 1 and 2, according to some embodiments of the present invention, the heating member 4 is a heating pipe extending spirally, and a spiral direction of the heating pipe is configured to coincide with a flow direction of the water current. For example, in some alternative embodiments of the present invention, the heating member 4 may be a heat generating pipe, the heat generating pipe may extend spirally, and a spiral direction of the heat generating pipe is configured to coincide with a flow direction of the water current. Therefore, the water flow entering the heating cavity 22 can move along the wall surface of the heating cavity 22, so that a rotational flow can be formed, the rotational flow can prevent bubbles from gathering in the heating cavity 22, abnormal noise and dry burning caused by the gathering of the bubbles in the heating cavity 22 can be avoided, and the service life of the heating tube can be prolonged.

For example, in some alternative embodiments of the present invention, the heating tube design matched in the heating chamber 22 may be consistent with the direction of rotation of the water flow (e.g., the direction of flow of the water flow), e.g., the heating tube may be clockwise when viewed from the side of the drive motor.

According to the heating pump 100 of the embodiment of the invention, the pump cavity 21 (for example, the water pump volute 212) and the heating cavity 22 can be communicated through the communication channel 23, for example, the expansion channel, so that the water flow flowing into the heating cavity 22 through the expansion channel can move along the wall surface of the heating cavity 22, and thus a rotational flow can be formed, the rotational flow can prevent the air bubbles from gathering in the heating cavity 22, and can also avoid abnormal noise and dry burning phenomena caused by the gathering of the air bubbles in the heating cavity 22, which is beneficial to prolonging the service life of the heating tube.

of course, the present invention is not limited thereto, and in some embodiments of the present invention, the heating member 4 may also take a structural form different from that of the heat generating pipe. In some alternative embodiments of the present invention, the heating element 4 may be a thick film (not shown) provided on the inner wall surface of the heating chamber 22. For example, the heating element 4 may be a thick film, which may be provided on the inner wall surface of the heating chamber 22. Thus, heating of the water flow into the heating chamber 22 can also be achieved by the thick film.

According to some embodiments of the present invention, the inner wall surface of the heating cavity 22 is provided with a flow guiding rib (not shown in the drawings), and the extending direction of the flow guiding rib is configured to be consistent with the flowing direction of the water flow. For example, the inner wall surface of the heating chamber 22 may be provided with a flow guide rib, and the extending direction of the flow guide rib may be configured to coincide with the flow direction of the water flow. Therefore, the diversion ribs are arranged on the inner wall surface of the heating cavity 22, so that the winding effect of water flow is enhanced.

for example, the flow guiding ribs may be an integral structure extending spirally, or the flow guiding ribs may include a plurality of flow guiding ribs arranged separately, and the extending manner of the plurality of flow guiding ribs may be consistent with the flowing direction of the water flow.

According to some embodiments of the present invention, the motor shaft 11 is formed with an external thread, and the impeller 3 is formed with an internal thread, which is matched with the external thread to screw the motor shaft 11 and the impeller 3, wherein the external thread and the internal thread may rotate in the same direction, and the rotation direction of the external thread/the internal thread is opposite to the rotation direction of the driving motor 1. Therefore, the assembly connection between the driving motor 1 and the impeller 3 can be realized through the matching of the external thread and the internal thread, and the assembly reliability between the driving motor 1 and the impeller 3 can be further ensured by enabling the rotation direction of the external thread/the internal thread to be opposite to the rotation direction of the driving motor 1.

Referring to fig. 2, in some alternative embodiments of the present invention, the heat pump 100 may further include an end cap 5, the end cap 5 is formed with the water inlet 51, and the end cap 5 is hermetically connected to the pump housing 2. For example, in some embodiments of the present invention, the end cap 5 may be formed with the water inlet 51, the water inlet 51 may be disposed in communication with the pump chamber 21, and the end cap 5 is sealingly connected to the pump housing 2. Accordingly, the sealing performance between the end cover 5 and the pump housing 2 can be ensured, thereby preventing water leakage and improving the usability of the heat pump 100.

According to some embodiments of the invention, referring to FIG. 6, the end cap 5 is removably attached to the pump casing 2. Therefore, the end cover 5 is detachably connected with the pump shell 2, so that the end cover 5 and the pump shell 2 are assembled and disassembled conveniently, and the maintenance of the heating pump 100 is facilitated.

for example, in alternative embodiments of the invention, the end cap 5 may be attached to the pump casing 2, for example by a screw connection; the invention is not limited thereto and in some embodiments the end cap 5 may be connected to the pump housing 2 by a snap connection or the like.

Further, referring to fig. 20 and 21, the end cap 5 may include: a water inlet end cap 52 and a water outlet end cap 53.

Specifically, with reference to fig. 2, a second seal 7 may be provided between the water inlet cover 52 and the pump housing 2; a third seal 8 may be provided between the outlet cap 53 and the pump housing 2. By way of example and not limitation, the second and third seals 7, 8 may be, for example, O-rings or the like.

referring to fig. 20 and 21, an engagement groove 521 may be formed in the inlet cap 52, an engagement portion 26 (see fig. 15) may be formed in the pump housing 2, the engagement portion 26 may be engaged with the engagement groove 521, a second mounting groove 261 may be formed in the engagement portion 26, the second mounting groove 261 may be adapted to mount the second sealing member 7 therein, a third mounting groove 531 may be formed in the outlet cap 53, and the third mounting groove 531 may be adapted to mount the third sealing member 8 therein. Therefore, the second sealing member 7 is installed in the second installation groove 261 to facilitate the sealing connection between the water inlet cover 52 and the pump housing 2, and the third sealing member 8 is installed in the third installation groove 531 to facilitate the sealing connection between the water outlet cover 53 and the pump housing 2, so that water leakage can be prevented, and the use reliability of the heating pump 100 is ensured.

Referring to fig. 21 in conjunction with fig. 2, in some embodiments of the present invention, an inner side of the end cap 5 (e.g., the water inlet end cap 52) defines, in a flow direction of the water flow, a water inlet passage 54, a rectifying passage 55, and a fitting passage 56, the water inlet end of the water inlet passage 54 forming the water inlet 51, and the impeller 3 is provided at the fitting passage 56 and disposed spaced apart from an inner wall surface of the fitting passage 56 to define a backflow passage 9 adapted to backflow water flow between the impeller 3 and the fitting passage 56.

For example, in the flow direction of the water flow, the inner side of the end cover 5 may define a water inlet passage 54, a rectifying passage 55, and a fitting passage 56, the water inlet end of the water inlet passage 54 may form the water inlet 51, the rectifying passage 55 is for abutting with the impeller 3, the impeller 3 may be provided at the fitting passage 56, and the impeller 3 and the inner wall surface of the fitting passage 56 may be disposed at a distance, so that a backflow passage 9 adapted to backflow water flow may be defined between the impeller 3 and the fitting passage 56.

according to the heat pump 100 of the embodiment of the present invention, there may be a backflow phenomenon of the water flow due to a processing process, and therefore, the main function of the matching channel 56 is to form the narrow backflow channel 9 in cooperation with the impeller 3, so that the backflow amount can be suppressed, thereby being beneficial to improving the efficiency of the heat pump 100.

Further, referring to fig. 21, the outer wall surface of the water inlet passage 54 is formed with a sealing protrusion 541 to connect the water inlet hose. For example, the outer wall surface of the water inlet passage 54 may be formed with a sealing protrusion 541, the sealing protrusion 541 may be annular, the sealing protrusion 541 may include a plurality of sealing protrusions 541, the plurality of sealing protrusions 541 may be spaced apart along the extending direction of the water inlet passage 54, and the connection of the water inlet hose may be facilitated by the sealing protrusions 541.

In some alternative embodiments of the present invention, in conjunction with fig. 2, the outer wall surface of the outlet connection tube 25 may also be formed with a corresponding sealing protrusion, so as to facilitate the connection of the outlet hose through the sealing protrusion.

Referring to fig. 21 in conjunction with fig. 2, in some embodiments of the present invention, the inner wall surface of the rectifying passage 55 is configured in a shape in which the radial dimension gradually shrinks in the flow direction of the water flow. For example, in some alternative embodiments of the present invention, the inner wall surface of the rectifying passage 55 is configured in a shape in which the radial dimension gradually shrinks in the flow direction of the water current. Thereby, the flow rectification is facilitated through the rectifying passage 55, and the flow of water is stabilized.

further, the inner wall surface of the rectifying passage 55 is configured in a tapered or arc shape. For example, in the embodiment of the invention shown in fig. 21, the inner wall surface of the rectification passage 55 may be configured in an arc shape. Of course, the present invention is not limited thereto, and in some alternative embodiments of the present invention, the inner wall surface of the rectification passage 55 may also be configured to be tapered.

In some embodiments of the invention, the end cap 5 is a one-piece or split structure. For example, in some alternative embodiments of the invention, the end cap 5 may be a one-piece structure; of course, in some alternative embodiments of the present invention, the end cap 5 may also be a split structure. The specific forming mode of the end cover 5 is not limited, and the end cover can be adaptively arranged according to requirements in practical application.

Specific embodiments of the heat pump 100 according to the present invention will be described below with reference to the accompanying drawings.

The structure of the heat pump 100 according to the embodiment of the present invention is shown in fig. 1 to 10, wherein fig. 1 is a schematic view of the heat pump 100 according to the embodiment of the present invention; FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1; FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1; FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1; FIG. 5 is a cross-sectional view taken along line D-D of FIG. 1; FIG. 6 is another schematic view of the heat pump 100 of FIG. 1 according to an embodiment of the present invention; FIG. 7 is yet another schematic view of the heat pump 100 of FIG. 1 in accordance with an embodiment of the present invention; FIG. 8 is a cross-sectional view taken along line E-E of FIG. 7; FIG. 9 is a cross-sectional view taken along line F-F of FIG. 7; fig. 10 is still another schematic view of the heat pump 100 of fig. 1 according to an embodiment of the present invention.

The heat pump 100 includes: the impeller comprises components such as a driving motor 1, a pump shell 2, an impeller 3, a wiring terminal 221, a heating element 4 (such as a heating tube, a thick film and the like), a first sealing element 6, a second sealing element 7 (such as an O-shaped ring and the like), a third sealing element 8 (such as an O-shaped ring and the like) and an end cover 5. The driving motor 1 and the impeller 3 can be connected through an internal thread of the impeller 3 and an external thread of the motor shaft 11, wherein the rotating directions of the internal thread and the external thread can be the same, the rotating directions of the internal thread/the external thread are opposite to the rotating direction of the driving motor 1 so as to ensure that the impeller 3 cannot fall off during working, and the driving motor 1 drives the impeller 3; the pump housing 2 is a two-cavity structure, and a pump cavity 21 and a heating cavity 22 can be defined in the pump housing 2, and the pump cavity 21 and the heating cavity 22 are connected through a communication passage 23 (such as an expansion passage) between the pump cavity 21 and the heating cavity 22. The lower end of the pump case 2 and the connection terminal 221 of the heat generating tube may be connected by a bolt, and a first installation groove 212 (e.g., a concave structure) for installing a first sealing member 6 (e.g., a sealing gasket) is formed on the heating chamber 22 to prevent water leakage. The end cover 5 and the pump casing 2 may be connected by screws, and a second sealing member 7 and a third sealing member 8 may be disposed between the end cover 5 and the pump casing 2 to prevent water from leaking from the end cover 5, for example, the second sealing member 7 may be disposed between the water inlet end cover 52 and the pump casing 2, and the third sealing member 8 may be disposed between the water outlet end cover 53 and the pump casing 2.

Water enters the heating pump 100 through the water inlet channel 54 (such as a water suction connecting pipe) with the sealing protrusion 541 on the outer side of the end cover 5, then enters the impeller 3 through the rectifying channel 55, the rectifying channel 55 is arranged to be beneficial to rectifying, is pressurized by the work of the impeller 3, high-speed water flow enters the water pump volute 212 to be collected, then enters the heating cavity 22 through the tangential communication channel 23 (such as an expansion channel), water entering the heating cavity 22 enters in a tangential mode, therefore, main water flow winds along the wall surface and winds around the heating pipe with the same rotating direction and the water flow rotating direction at high speed, and finally, the heated water flow which winds for one circle can be led out of the heating pump 100 through the tangential outlet connecting pipe 25.

Detailed structural views of the pump housing 2 are shown in fig. 11-17, in which fig. 11 is a perspective view of the pump housing 2 of the heat pump 100 of fig. 1 according to the embodiment of the present invention; fig. 12 is another perspective view of the pump case 2 in the heat pump 100 of fig. 1 according to the embodiment of the present invention; fig. 13 is a schematic view of a pump housing 2 in the heat pump 100 of fig. 1 according to the embodiment of the present invention; fig. 14 is another schematic view of the pump case 2 of the heat pump 100 of fig. 1 according to the embodiment of the present invention; FIG. 15 is a sectional view taken along line G-G of FIG. 14; FIG. 16 is a sectional view taken along line H-H in FIG. 14; fig. 17 is still another schematic view of the pump housing 2 of the heat pump 100 of fig. 1 according to the embodiment of the present invention; FIG. 18 is a sectional view taken along line I-I of FIG. 17; fig. 19 is a sectional view taken along line J-J in fig. 17.

The pump housing 2 mainly includes: an inlet connection section 211, a water pump volute 212, a communication passage 23 (e.g., an expansion passage), a heating chamber 22, an outlet connection pipe 25, and a first mounting groove 212, etc. Wherein the inlet connection section 211 encases the inlet connection tube, typically a straight tube. The communication channel 23, such as an expansion channel, is used for connecting the water pump volute 212 and the heating chamber 22 and is structurally arranged at a tangential (near top) position of the heating pump 100, and the main consideration of the design is to facilitate the smooth introduction of the bubbles sucked by the impeller 3 into the heating chamber 22 without accumulating in the water pump volute 212, so as to avoid the generation of bubble noise. A further consideration of the tangential manner of the communicating passage 23, e.g. the expanding passage, into the heating chamber 22 is to introduce the water flow into the heating chamber 22 at a high speed and to wind the water flow along the wall surface of the heating chamber 22, facilitating the improvement of the heat exchange performance of the heat generating tube, and the communicating passage 23, e.g. the expanding passage, is of an expanding type, and is configured to gradually increase from the upstream side to the downstream side in the flow direction of the water flow, and the degree of expansion is generally required to be not more than 20 ° to avoid the loss due to too. The heating chamber 22 is characterized by being arranged substantially axially side by side with the pump chamber 22 (the impeller 3 is arranged in the pump chamber 22), and a first installation groove 212 is formed at the bottom of the heating chamber 22, and the first installation groove 212 is used for installing a first sealing member 6 such as a sealing gasket, so that the heating member 4 such as a heating pipe and the like and the connection terminal 221 can be internally and externally sealed. The heating pipe is arranged in the heating cavity 22, and because the high temperature of the heating pipe only can radiate the heating cavity 22 without affecting the impeller 3, the phenomenon that the thermal radiation of the heating pipe causes the premature aging of the plastic impeller 3, which does not affect the performance of the heating pump 100, does not occur. Since the communication channel 23, e.g. the expansion channel, enters the heating chamber 22 from the top, the design of the heating tube generally coincides with the direction of the water flow, i.e. the heating tube is clockwise when viewed from the side of the drive motor. Finally, the water flow of one revolution leads the water out of the heating pump 100 through a tangential outlet connection 25, the outlet connection 25 preferably being arranged at the top of the heating chamber 22. The purpose is mainly that the bubbles entering the heating cavity 22 are smoothly discharged out of the heating cavity 22, so that the generation of bubbles is avoided, and meanwhile, the existence of the bubbles can also influence the heat exchange of the heating tube, and the dry burning phenomenon can be caused to damage in severe cases.

The end cap 5 is constructed as shown in fig. 20-21, wherein fig. 20 is a perspective view of the end cap 5 of the heat pump 100 of fig. 1 according to an embodiment of the present invention; fig. 21 is a sectional view of the end cap 5 of the heat pump 100 of fig. 20 according to the embodiment of the present invention. The end cover 5 is mainly used for connecting the water inlet pipe and the sealed heating cavity 22, and the structure of the end cover 5 can be an integral structure or two end covers which are separated into a water inlet end cover 52 and a water outlet end cover 53. The end cap 5 mainly includes: the water inlet channel 54, the rectifying channel 55, the matching channel 56, the water inlet end cover 52, the matching groove 521 arranged on the water inlet end cover 52, the water outlet end cover 53 and the third mounting groove 531 arranged on the water outlet end cover 53.

the outer side of the water inlet channel 54 is provided with a sealing bulge 541 structure for connecting a water inlet hose, and the rectifying channel 55 is a contraction section which is mainly used for stabilizing the water flow arrangement and is butted with the impeller 3. The matching channel 56 mainly forms a backflow channel 9 with the outer side of the impeller 3, and because a certain backflow phenomenon of water flow can exist in the small-sized heating pump due to the processing process, the matching channel 56 mainly plays a role in matching with the impeller 3 to form a narrow backflow channel 9, so that the backflow amount is inhibited, and the efficiency of the heating pump 100 is improved. The water outlet end cover 53 mainly seals water flow on one side of the heating tube, and a third installation groove 531 is processed in the end cover, and is matched with a third sealing element 8, such as an O-ring, to seal the heating cavity 22.

A dishwasher (not shown) according to a second aspect of the present invention includes the above-described heat pump 100. Therefore, by providing the heat pump 100 of the first aspect embodiment on the dishwasher, the volume of the dishwasher can be reduced, and the service life of the dishwasher can be prolonged.

a washing machine (not shown) according to an embodiment of the third aspect of the present invention includes the above-described heat pump 100. Therefore, by providing the heat pump 100 of the first embodiment to the washing machine, the volume of the washing machine can be reduced, and the service life of the washing machine can be prolonged.

the heat pump 100 according to the embodiment of the present invention is not limited to a dishwasher or a washing machine, but may be applied to other implementation scenarios requiring the use of the heat pump 100.

Other constructions and operations of the heat pump 100 and the dishwasher or washing machine having the same according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

in the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

while embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat pump, comprising:

A drive motor;

The pump comprises a pump shell, a pump cavity and a heating cavity, wherein the pump cavity and the heating cavity are approximately arranged side by side in the axial direction, the pump cavity and the heating cavity are suitable for being communicated through a communication passage, and a water inlet communicated with the pump cavity and a water outlet communicated with the heating cavity are formed in the pump shell;

The impeller is arranged in the pump cavity and connected with a motor shaft of the driving motor;

the heating member is arranged in the heating cavity.

2. A heat pump according to claim 1, wherein the communication passage is configured to extend in a tangential direction of an inner wall surface of the pump housing.

3. a heat pump according to claim 1, wherein the communication passage is configured as an expanding passage in a flow direction of the water flow, and an expanding angle of the expanding passage is not more than 20 degrees.

4. A heat pump according to claim 3, wherein the pump chamber comprises, in the flow direction of the water flow: the expansion channel is formed between the water pump volute and the heating cavity.

5. A heat pump according to claim 3, wherein an outlet connection pipe communicating with the heating chamber is provided on the pump housing, and a free end of the outlet connection pipe forms the water outlet.

6. a heat pump according to claim 5, wherein the outlet nozzle is configured to extend tangentially to an outer side wall of the heating chamber.

7. A heat pump according to claim 1, wherein the bottom of the heating chamber is formed with a first mounting groove in which a first sealing member is disposed.

8. a heat pump according to claim 1, wherein the heating member is a heat generating pipe extending spirally, and a direction of rotation of the heat generating pipe is configured to coincide with a flow direction of the water flow.

9. a heat pump according to claim 1, wherein the heating element is a thick film provided on an inner wall surface of the heating chamber.

10. A heat pump according to claim 1, wherein an inner wall surface of the heating chamber is provided with a flow guide rib, and an extending direction of the flow guide rib is configured to coincide with a flow direction of the water flow.

11. A heat pump as claimed in claim 1, wherein the motor shaft is formed with an external thread, the impeller is formed with an internal thread, and the external thread is matched with the internal thread to screw-couple the motor shaft and the impeller, and the rotation direction of the external/internal thread is opposite to the rotation direction of the driving motor.

12. a heat pump according to any one of claims 1-11, further comprising:

The end cover is formed with the water inlet and is connected with the pump shell in a sealing mode.

13. A heat pump as claimed in claim 12, wherein the end cap comprises:

A second sealing element is arranged between the water inlet end cover and the pump shell;

A third sealing element is arranged between the water outlet end cover and the pump shell;

The water inlet end cover is provided with a matching groove, the pump shell is provided with a matching part matched with the matching groove, the matching part is provided with a second mounting groove suitable for mounting the second sealing element, and the water outlet end cover is provided with a third mounting groove suitable for mounting the third sealing element.

14. a heat pump according to claim 13, wherein the inner side of the end cover defines, in a flow direction of the water flow, a water inlet passage, a water rectifying passage, and a fitting passage, a water inlet end of the water inlet passage forming the water inlet, and the impeller is provided at the fitting passage and is disposed spaced apart from an inner wall surface of the fitting passage to define a return passage adapted to return the water flow between the impeller and the fitting passage.

15. A heat pump as claimed in claim 14, wherein the outer wall surface of the water inlet passage is formed with a sealing protrusion to be connected to a water inlet hose.

16. A heat pump according to claim 14, wherein an inner wall surface of the rectifying passage is configured in a shape in which a radial dimension is gradually contracted in a flow direction of the water flow.

17. A heat pump according to claim 16, wherein an inner wall surface of the rectifying passage is configured to be tapered or curved.

18. A dishwasher, characterized by comprising a heat pump according to any one of claims 1-17.

19. a washing machine characterized by comprising a heat pump according to any one of claims 1-17.