CN112797003A

CN112797003A - Heat collecting pump

Info

Publication number: CN112797003A
Application number: CN201911105639.5A
Authority: CN
Inventors: 胡小文; 谭发刚; 王文鹏; 刘日超; 胡斯特; 戴龙珍
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: 2019-11-13
Filing date: 2019-11-13
Publication date: 2021-05-14
Anticipated expiration: 2039-11-13
Also published as: WO2021093830A1; CN112797003B

Abstract

The invention discloses a heat collecting pump, comprising: the pump comprises a pump body, a pump inner pipe and a pump outer pipe, wherein the pump outer pipe is sleeved on the pump inner pipe, a pipe cavity of the pump inner pipe forms an inner flow cavity, an outer flow cavity is defined between the pump outer pipe and the pump inner pipe, and one end of the inner flow cavity forms a communication port communicated with the outer flow cavity; the water flow driving part is used for driving water flow in the inner flow cavity to flow towards the outer flow cavity through the communication port; the heating piece is arranged on the pump inner pipe, so that at least part of the inner wall surface of the pump inner pipe forms an inner heating surface, and at least part of the outer wall surface of the pump inner pipe forms an outer heating surface. According to the heat collecting pump disclosed by the embodiment of the invention, the heating efficiency of the heat collecting pump can be improved.

Description

Heat collecting pump

Technical Field

The invention relates to the technical field of pump body structures, in particular to a heat collection pump.

Background

In the related art, the heat collecting pumps are provided with heating members. Some heating elements may be directly inserted into the water flow, for example, directly inserted into an outflow cavity of the heat collecting pump, which may obstruct the flow of water, resulting in pressure loss of the water flow, and thus the operation efficiency of the water flow driving element is low.

Some heating elements are arranged on the inner wall surface of the outer pipe of the pump, one side of each heating element is in direct contact with water, and the other side of each heating element needs to be insulated by heat insulation materials. For another example, some heat generating members are disposed between the pump inner tube and the pump outer tube, but the inner wall surface of the heat generating member is placed in water, and the outer side needs to be insulated with air or other media. The above heat generating member has a low heat efficiency, so that the heat collecting pump has a low heating efficiency.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a heat collecting pump to improve the heating efficiency of the heat collecting pump.

A heat collecting pump according to an embodiment of the present invention includes: the pump comprises a pump body, a pump inner pipe and a pump outer pipe, wherein the pump outer pipe is sleeved on the pump inner pipe, a pipe cavity of the pump inner pipe forms an inner flow cavity, an outer flow cavity is defined between the pump outer pipe and the pump inner pipe, and one end of the inner flow cavity forms a communication port communicated with the outer flow cavity; the water flow driving part is used for driving water flow in the inner flow cavity to flow towards the outer flow cavity through the communication port; the heating piece is arranged on the pump inner pipe, so that at least part of the inner wall surface of the pump inner pipe forms an inner heating surface, and at least part of the outer wall surface of the pump inner pipe forms an outer heating surface.

According to the heat collection pump provided by the embodiment of the invention, the tube cavity of the pump inner tube forms the inner flow cavity, the outer flow cavity can be defined between the pump outer tube and the pump inner tube, a separating piece is not required to be arranged independently, and the structure of the heat collection pump can be simplified. The heating element is arranged on the pump inner tube, at least part of the inner wall surface of the pump inner tube forms an inner heating surface, and at least part of the outer wall surface of the pump inner tube forms an outer heating surface, so that the flow of water flow can be guided, the operation efficiency of the water flow driving element is improved, and if the heating element is directly inserted into the water, the flow of the water flow is blocked. The heating element does not need to be insulated from the pump body and is not in contact with the outside air, heat can be totally led into water, and the heat efficiency of the heating element can be improved. In the primary circulation of the water flow driving piece driving water liquid to pass through the inner wall surface and the outer wall surface of the inner pipe of the pump, the water liquid can absorb heat transferred by the heating piece twice, so that the heat efficiency of the heating piece can be further improved, and the heating efficiency of the heat collecting pump is improved.

In some embodiments, the pump further comprises a flow guide structure arranged on the pump body, and the flow guide structure is positioned in the inner flow cavity and/or the outer flow cavity.

Specifically, the flow guide structure comprises at least one of a flow guide blade and a flow guide rib.

In some alternative embodiments, when the flow directing structure is provided on the outer hot face or the inner hot face, the flow directing structure is a conductor.

In some alternative embodiments, the flow directing structure is integrally formed on the pump inner tube and/or the pump outer tube.

Specifically, the pump outer tube and the pump inner tube are axially divided into a plurality of sections, the flow guide structure is a flow guide blade, and the flow guide blade, one tube section of the pump inner tube and one tube section of the pump outer tube are integrally formed.

In some embodiments, at least a portion of the pump inner tube constitutes a heating tube, the heat generating member being disposed within a tube wall of the heating tube, the heating tube including: the wall of the sleeve forms a wall inner cavity, and the heating element is arranged in the wall inner cavity; the filler is filled in the inner cavity of the wall to cover the heating element.

In some embodiments, the heating element is a heating wire, and the heating wire is in a spiral shape with uniform pitch.

In some embodiments, the water flow drive comprises:

the motor is hermetically connected to one end of the outer pipe of the pump;

and the centrifugal wheel is arranged right opposite to the communication port and is connected with the motor.

Specifically, the inlet end of the centrifugal wheel extends into the pump inner tube, the outlet end of the centrifugal wheel is positioned between the tube end of the pump inner tube and the motor, and the communication port is formed as a flared opening which is consistent with the shape of the centrifugal wheel.

In some embodiments, a water inlet pipe is connected to one end of the pump inner pipe, which is far away from the communication port, and a water outlet pipe is radially connected to the pipe wall of the pump outer pipe, which is far away from the communication port; when the pump outer pipe and the pump inner pipe are axially divided into a plurality of sections, the pipe sections, the water inlet pipe and the water outlet pipe, which are far away from the communication port, of the pump outer pipe and the pump inner pipe are integrally formed, and one end, which is close to the communication port, of the pump outer pipe is connected with the water flow driving piece.

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 structural diagram of a heat collection pump according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a heat collection pump in an embodiment of the present invention;

FIG. 3 is a sectional view of a heat collection pump in another direction in an embodiment of the present invention;

FIG. 4 is a partial schematic structural view of a heat collection pump according to an embodiment of the present invention (wherein, the partial schematic structural view is the structural view of the pipe segment A in the pump outer pipe and the pump inner pipe);

FIG. 5 is a schematic view of the structure shown in FIG. 4 from another perspective;

FIG. 6 is a partial schematic structural view of a heat collection pump according to an embodiment of the present invention (wherein, the partial schematic structural view is the structural view of the B pipe section in the pump outer pipe and the pump inner pipe);

FIG. 7 is a schematic structural diagram of a heating pipe and a heat generating member according to an embodiment of the present invention.

Reference numerals:

a heat collecting pump 100,

The pump body 1, the pump inner pipe 11, the heating pipe 111, the sleeve 1110, the packing 1112, the pump outer pipe 12, the first connecting boss 121, the second connecting boss 122, the annular groove 123, the annular protrusion 124, the communication port 13, the pump outer pipe, the pump inner pipe, the pump,

A water flow driving piece 2, a motor 21, a centrifugal wheel 22,

Heating element 3, water conservancy diversion structure 4, inlet tube 5, outlet pipe 6, rotatory buckle structure 7.

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 description of the present invention, it is to be understood that the terms "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A heat collecting pump 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 7.

The heat collecting pump 100 according to the embodiment of the present invention, as shown in fig. 1 to 3, includes: pump body 1, rivers driving piece 2 and the piece 3 that generates heat. The pump body 1 is provided with a pump inner tube 11 and a pump outer tube 12, the pump outer tube 12 is sleeved on the pump inner tube 11, a tube cavity of the pump inner tube 11 forms an inner flow cavity, an outer flow cavity is defined between the pump outer tube 12 and the pump inner tube 11, and one end of the inner flow cavity forms a communication port 13 communicated with the outer flow cavity. The water flow driving member 2 is used for driving the water flow in the inner flow cavity to flow towards the outer flow cavity through the communication port 13. The heat generating member 3 is provided on the pump inner tube 11 such that at least a part of an inner wall surface of the pump inner tube 11 constitutes an inner heat surface and at least a part of an outer wall surface of the pump inner tube 11 constitutes an outer heat surface.

It can be understood that, on one hand, the pump inner tube 11 can provide an operation position for the heat generating element 3, and on the other hand, the pump inner tube 11 can separate the water flow, as in the prior art, the heat collecting pump is additionally provided with a partition for separating the water flow, which results in a complex structure, whereas the heat collecting device of the embodiment of the present invention needs to be separately provided with a partition, which can simplify the structure of the heat collecting pump 100.

The heating member 3 is provided on the pump inner tube 11, and at least a part of the inner wall surface of the pump inner tube 11 may be an inner heating surface, and at least a part of the outer wall surface of the pump inner tube 11 may be an outer heating surface. The heating element 3 does not need to be insulated from the pump body 1 and does not contact with the outside air, and the heat can be completely led into the water, so that the heat efficiency of the heating element 3 can be improved.

As shown in fig. 3, in the process that the water flow driving member 2 drives the water flow in the inner flow cavity to flow towards the outer flow cavity through the communication port 13, when the water flow flows in the inner flow cavity, the inner hot surface can transfer heat to the water liquid, and when the water flow driving member 2 drives the water liquid to flow in the outer flow cavity, the water flow can absorb the heat transferred by the outer hot surface. That is, the water can absorb the heat transferred from the heat generating member 3 twice in one circulation of the water through the inner wall surface and the outer wall surface, so that the heating area of the heat collecting pump 100 is greatly increased, thereby further improving the heating efficiency of the heating pump.

In addition, the heating element 3 is disposed on the pump inner tube 11, so that at least a portion of the inner wall surface of the pump inner tube 11 forms an inner heating surface, and at least a portion of the outer wall surface of the pump inner tube 11 forms an outer heating surface, which can guide the flow of water, and if the heating element 3 is directly inserted into the outer flow cavity of the heat collecting pump 100, the flow of water is obstructed, resulting in pressure loss of water flow.

According to the heat collecting pump 100 of the embodiment of the present invention, by constituting the tube cavity of the pump inner tube 11 as the inner flow cavity, the outer flow cavity can be defined between the pump outer tube 12 and the pump inner tube 11, and a separate partition is not required, so that the structure of the heat collecting pump 100 can be simplified. Through establishing heating member 3 on pump inner tube 11, make at least partial internal wall face of pump inner tube 11 constitute interior hot side, and make at least partial outer wall face of pump inner tube 11 constitute outer hot side to can produce the guide effect to the flow of rivers, improve the operating efficiency of rivers driving piece 2, if heating member 3 disect insertion aquatic, can hinder the flow of rivers. The heating element 3 does not need to be insulated from the pump body 1 and does not contact with the outside air, and the heat can be completely led into the water, so that the heat efficiency of the heating element 3 can be improved. In one circulation of the water driven by the water flow driving member 2 through the inner wall surface and the outer wall surface of the pump inner tube 11, the water can absorb the heat transferred by the heating member 3 twice, so that the heat efficiency of the heating member 3 can be further improved, and the heating efficiency of the heat collecting pump 100 can be improved.

In some embodiments, as shown in fig. 3, the heat collection pump 100 further comprises a flow guiding structure 4 provided on the pump body 1, the flow guiding structure 4 being located in the inner flow cavity and/or the outer flow cavity. It can be understood that the arrangement of the flow guiding structure 4 can play a role in guiding and diffusing the flow of the water flow, so as to improve the cutting angle of the water flow flowing in the pump body 1, reduce the flow loss of the water flow, improve the operation efficiency of the water flow driving member 2, and improve the hydraulic performance of the heat collecting pump 100. It should be noted that, when the heat collecting pump 100 is applied to a household appliance, the water jet pressure corresponding to the heat collecting pump 100 with good hydraulic performance is high, which can improve the cleaning efficiency of the household appliance.

Specifically, the flow guiding structure 4 includes at least one of a flow guiding vane and a flow guiding rib. It can be understood that the guide vane has a large contact area with the water flow, which can further improve the water flow guiding effect. The flow guiding ribs can play a role in guiding the flow of water flow, and can also improve the rigidity of the pump body 1 and prolong the service life of the heat collecting pump 100.

In some alternative embodiments, the flow guiding structure 4 is a conductor when the flow guiding structure 4 is provided on the outer hot side or the inner hot side. Therefore, the flow guide structure 4 not only can guide the flow of water flow, but also can increase the contact area of water liquid and a heat source. That is, the flow guide structure 4 serves as a conductor and can absorb heat from the outer hot surface or the inner hot surface, so that the flow guide structure 4 can also serve as a heating surface and can enlarge the heating area of the outer hot surface or the inner hot surface. When water flows through the diversion structure 4, the diversion structure 4 can transfer heat to water, so that the heat efficiency of the heating element 3 can be further improved.

In some alternative embodiments, the flow directing structure 4 is integrally formed on the pump inner tube 11 and/or the pump outer tube 12. It can be understood that, when the flow guide structure 4 is integrally formed on the pump inner tube 11, the flow guide structure 4 may be located on the inner wall surface of the pump inner tube 11, and at this time, the flow guide structure 4 may guide the water flow in the inner flow cavity, so as to reduce the pressure loss of the water flow. As shown in fig. 3 and 4, the flow guiding structure 4 may also be located on the outer wall surface of the pump inner tube 11, and at this time, the flow guiding structure may play a role in guiding and diffusing the water flow in the outer flow cavity, and may increase the cut-in angle of the water flow flowing in the outer flow cavity, thereby improving the hydraulic performance of the heat collecting pump 100. When the flow guiding structure 4 is integrally formed on the pump outer tube 12, the flow guiding structure may be located on the inner wall surface of the pump outer tube 12, and the flow guiding structure may also play a role in guiding and diffusing water flow in the outflow cavity.

Specifically, as shown in fig. 3 and 4, the pump outer tube 12 and the pump inner tube 11 are each axially divided into a plurality of sections, the guide structure 4 is a guide vane, and the guide vane, a tube section of the pump inner tube 11, and a tube section of the pump outer tube 12 are integrally formed. It can be understood that the pump outer tube 12 and the pump inner tube 11 are axially divided into multiple sections, so that the respective sections of the pump outer tube 12 and the pump inner tube 11 can be separately processed, the molding of the pump outer tube 12 and the pump inner tube 11 can be facilitated, and the cost of the pump inner tube 11 and the pump outer tube 12 can be reduced. In addition, as shown in fig. 3 and 4, for convenience of description, a pipe section in which the guide vane, a pipe section of the pump inner pipe 11, and a pipe section of the pump outer pipe 12 are integrally formed is denoted by an a pipe section, and the a pipe section is integrally formed to improve the sealing property of the a pipe section, reduce the pressure loss of water flow, improve the structural strength of the a pipe section, and improve the service life of the pump body 1.

Alternatively, as shown in fig. 3, a matching structure is provided between the pipe section a and the pipe section B which are adjacent to the pipe section a and far from the water flow driving member 2, among the pipe sections of the pump outer pipe 12 and the pump inner pipe 11, and the connection stability between the pipe section a and the pipe section B can be improved by the arrangement of the matching structure.

Alternatively, as shown in fig. 2 and 5, the fitting structure may include a first coupling boss 121 provided on the pump outer tube 12 in the section a, and a second coupling boss 122 provided on the pump outer tube 12 in the section B. The connection of the first connection boss 121 and the second connection boss 122 may be achieved by a fastener such as a screw, etc., thereby achieving the coupling between the a pipe segment and the B pipe segment.

Alternatively, as shown in fig. 4 and 6, an annular groove 123 is provided on the end surface of the pump outer tube 12 in the section B, and an annular protrusion 124 may be provided on the end surface of the pump outer tube 12 in the section a, and the annular protrusion 124 is fitted into the annular groove 123.

Alternatively, as shown in fig. 2 and 6, an O-ring may be fitted in the annular groove 123. It will be appreciated that when the a pipe section and the B pipe section are fitted, the annular protrusion 124 may compress the O-ring, thereby improving the air tightness and fitting stability of the a pipe section and the B pipe section.

As shown in fig. 1, a rotary buckle structure is arranged between the pipe segment a and the water flow driving member 2. Can match between A pipe section and the rivers driving piece 2 through the setting of rotatory buckle structure, can improve the connection stability between A pipe section and the rivers driving piece 2.

Optionally, as shown in fig. 3, an O-ring is provided on the end surface of the pump outer tube 12 in the tube section a. It can be understood that when the A pipe section is matched with the driving part, the O-shaped ring can be pressed, so that the air tightness and the matching stability of the A pipe section and the B pipe section can be improved.

In some embodiments, as shown in fig. 3 and 7, at least a portion of the pump inner tube 11 constitutes a heating tube 111, the heat generating element 3 is disposed in a tube wall of the heating tube, and the heating tube 111 includes: a sleeve 1110 and a filler 1112. The wall of the casing 1110 forms a wall cavity, and the heating element 3 is arranged in the wall cavity. The filler 1112 is filled in the inner cavity of the wall to cover the heat generating member 3. It can be understood that, through the arrangement of the filler 1112, the fixing and limiting effects on the heating element 3 can be achieved, and the operation stability of the heating element 3 can be improved. Some heating elements are fixed on the heating pipe in printing and other modes, the manufacturing process is complex, the cost is high, in the embodiment of the invention, the form of the sleeve 1110 and the filler 1112 is adopted, so that the heating element 3 can be conveniently matched with the heating pipe 111, and the cost is reduced.

Specifically, when the heating element 3 works, the heat of the heating wire is firstly conducted to the sleeve 1110 through the filler 1112, so that the outer wall surface of the sleeve 1110 located in the outer flow cavity can form an outer heating surface, and the outer wall surface of the sleeve 1110 located in the inner flow cavity can form an inner heating surface, thereby realizing the twice heating of the water liquid.

In addition, at least a portion of the pipe section of the pump inner pipe 11 constitutes the heating pipe 111, so that the pump body 1 does not need to be separately provided with the heating pipe 111, the structure of the heat collecting pump 100 can be simplified, the blocking effect of the heating pipe 111 on water flow can be reduced, and the pressure loss can be reduced.

Optionally, the sleeve 1110 may be made of a metal material such as stainless steel, which not only improves the thermal conductivity of the sleeve 1110, but also improves the corrosion resistance of the sleeve 1110, and improves the service life of the sleeve 1110.

Alternatively, the outer wall surface of the sleeve 1110 is smooth, so that the sleeve 1110 can be directly contacted with water without resistance to water flow, thereby further improving the operation efficiency of the water flow driver 2.

In some embodiments, the heating element 3 is a heating wire, and the heating wire is spiral with uniform pitch. Thus, the heating uniformity of the heating member 3 can be improved, and the heating area of the heating member 3 can be increased, so that the heating efficiency of the heating member 3 can be improved.

In some embodiments, as shown in fig. 3, the water flow drive 2 comprises: and the motor 21 is hermetically connected to one end of the pump outer pipe 12. The centrifugal wheel 22 is arranged opposite to the communication port 13, and the centrifugal wheel 22 is connected with the motor 21. The motor 21 may thus power the centrifugal wheel 22, so that the centrifugal wheel 22 rotates to drive the water flow to change the flow direction, so that the water flow in the inner flow chamber flows towards the outer flow chamber through the communication port 13. The centrifugal wheel 22 can also work on the water flow to form a high pressure water flow, so that the hydraulic performance of the heat collecting pump 100 can be improved.

Specifically, as shown in fig. 3, the inlet end of the centrifugal wheel 22 extends into the pump inner tube 11, the outlet end of the centrifugal wheel 22 is located between the tube end of the pump inner tube 11 and the motor 21, and the communication port 13 is formed as a flare conforming to the shape of the centrifugal wheel 22. Therefore, when the centrifugal wheel 22 drives the water flow in the inner flow cavity to flow towards the outer flow cavity through the communication port 13, the flaring structure can guide the flow of the water flow, can also play a role in reducing and diffusing the water flow, can reduce the leakage flow loss of the centrifugal wheel 22 from the inlet end to the outlet end caused by pressure difference, and can improve the operation efficiency of the centrifugal wheel 22.

In some embodiments, as shown in fig. 1 and 2, the pump inner tube 11 is connected with the water inlet tube 5 at one end far away from the communication port 13, and the pump outer tube 12 is connected with the water outlet tube 6 along the radial direction at the tube wall far away from the communication port 13. Therefore, water flow can enter the pump inner tube 11 through the water inlet tube 5, and after being heated by the inner hot surface, the water flow enters the outer flow cavity defined by the pump outer tube 12 and the pump inner tube 11 through the communication port 13, and after being heated by the outer hot surface, the water flow flows out through the water outlet tube 6.

As shown in fig. 3, when the pump outer tube 12 and the pump inner tube 11 are axially divided into multiple sections, the tube sections of the pump outer tube 12 and the pump inner tube 11 away from the communication port 13, the water inlet tube 5, and the water outlet tube 6 are integrally formed, and one end of the pump outer tube 12 adjacent to the communication port 13 is connected to the water flow driving member 2. It can be understood that, the pipe sections of the pump outer pipe 12 and the pump inner pipe 11 far away from the communication port 13, the water inlet pipe 5 and the water outlet pipe 6 are integrally formed, so that the structural strength of the pump body 1 can be improved, the air tightness of the pump body 1 can be improved, and the flowing pressure loss can be reduced.

The heat collecting pump 100 according to one embodiment of the present invention will be described with reference to fig. 1 to 7.

The heat collecting pump 100 according to the embodiment of the present invention includes: the pump body 1, rivers driving piece 2 and heater, water conservancy diversion structure 4, inlet tube 5 and outlet pipe 6.

The pump body 1 is provided with a pump inner tube 11 and a pump outer tube 12, the pump outer tube 12 is sleeved on the pump inner tube 11, a tube cavity of the pump inner tube 11 forms an inner flow cavity, an outer flow cavity is defined between the pump outer tube 12 and the pump inner tube 11, one end of the inner flow cavity forms a communication port 13 communicated with the outer flow cavity, and the communication port 13 is formed into a flaring opening with the shape consistent with that of the centrifugal wheel 22. The pump outer tube 12 and the pump inner tube 11 are each divided into a plurality of segments in the axial direction.

The water inlet pipe 5 is connected to one end of the pump inner pipe 11 far away from the communication port 13, and the water outlet pipe 6 is connected to the pipe wall radial direction of the pump outer pipe 12 far away from the communication port 13. The pipe sections of the pump outer pipe 12 and the pump inner pipe 11 far away from the communication port 13, the water inlet pipe 5 and the water outlet pipe 6 are integrally formed.

Part of the pipe section of the pump inner pipe 11 constitutes a heating pipe 111, the heating element 3 is arranged in the pipe wall of the heating pipe, and the heating pipe 111 comprises: a sleeve 1110 and a filler 1112. The wall of the casing 1110 forms a wall cavity, and the heating element 3 is arranged in the wall cavity. The filler 1112 is filled in the inner cavity of the wall to coat the heating wire, and the heating wire is in a spiral shape with uniform screw pitch.

The water flow driving member 2 is provided at an end of the pump outer tube 12 adjacent to the communication port 13. The water flow driver 2 comprises: a motor 21 and a centrifugal wheel 22. The motor 21 is hermetically connected at one end of the pump outer tube 12, and the motor 21 is connected with the centrifugal wheel 22. The inlet end of the centrifugal wheel 22 extends into the pump inner tube 11, and the outlet end of the centrifugal wheel 22 is located between the tube end of the pump inner end and the motor 21.

The flow guiding structure 4 is a flow guiding vane, and the flow guiding vane, a pipe section of the pump inner pipe 11 and a pipe section of the pump outer pipe 12 are integrally formed.

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 collection pump, comprising:

the pump comprises a pump body, a pump inner pipe and a pump outer pipe, wherein the pump outer pipe is sleeved on the pump inner pipe, a pipe cavity of the pump inner pipe forms an inner flow cavity, an outer flow cavity is defined between the pump outer pipe and the pump inner pipe, and one end of the inner flow cavity forms a communication port communicated with the outer flow cavity;

the water flow driving part is used for driving water flow in the inner flow cavity to flow towards the outer flow cavity through the communication port;

the heating piece is arranged on the pump inner pipe, so that at least part of the inner wall surface of the pump inner pipe forms an inner heating surface, and at least part of the outer wall surface of the pump inner pipe forms an outer heating surface.

2. Heat collection pump according to claim 1, further comprising flow directing structures provided on said pump body, said flow directing structures being located in said inner flow chamber and/or said outer flow chamber.

3. A heat collecting pump as claimed in claim 2, wherein said flow directing structure comprises at least one of flow directing vanes and flow directing ribs.

4. Heat collection pump according to claim 2, characterized in that said flow guiding structure is a conductive element when said flow guiding structure is provided on said external hot face or on said internal hot face.

5. Heat collecting pump according to claim 2, characterised in that said flow guiding structure is integrated on said pump inner tube and/or said pump outer tube.

6. A heat collecting pump as claimed in claim 5, wherein said pump outer tube and said pump inner tube are each axially divided into a plurality of sections, said flow guiding structure is a guide vane, and said guide vane, a tube section of said pump inner tube and a tube section of said pump outer tube are integrally formed.

7. A heat collecting pump as claimed in claim 1, characterized in that at least part of the tube section of said pump inner tube constitutes a heating tube, said heat generating element being provided in the tube wall of said heating tube, said heating tube comprising:

the wall of the sleeve forms a wall inner cavity, and the heating element is arranged in the wall inner cavity;

the filler is filled in the inner cavity of the wall to cover the heating element.

8. A heat collection pump as claimed in claim 7, wherein said heat generating element is a heater wire, said heater wire being helically wound with a uniform pitch.

9. Heat collection pump according to claim 1, characterized in that said water flow driver comprises:

the motor is hermetically connected to one end of the outer pipe of the pump;

10. A heat collecting pump as claimed in claim 9, wherein said inlet end of said centrifugal wheel extends into said pump inner tube, said outlet end of said centrifugal wheel is located between said tube end of said pump inner tube and said motor, and said communication port is formed as a flare conforming to the shape of said centrifugal wheel.

11. A heat collecting pump as claimed in any one of claims 1 to 10, wherein said pump inner tube is connected to a water inlet tube at an end thereof remote from said communication port, and said pump outer tube is connected to a water outlet tube radially at a wall thereof remote from said communication port;

when the pump outer pipe and the pump inner pipe are axially divided into a plurality of sections, the pipe sections, the water inlet pipe and the water outlet pipe, which are far away from the communication port, of the pump outer pipe and the pump inner pipe are integrally formed, and one end, which is close to the communication port, of the pump outer pipe is connected with the water flow driving piece.