CN111481147B

CN111481147B - Flow guide element, heat collection pump and household appliance

Info

Publication number: CN111481147B
Application number: CN202010365913.9A
Authority: CN
Inventors: 吴建清; 刘日超; 李翔; 仇灿华; 许平平
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2022-02-25
Anticipated expiration: 2040-04-30
Also published as: CN111481147A

Abstract

The invention discloses a flow guide element, a heat collection pump and a household appliance. A plurality of water conservancy diversion pieces are connected at the periphery of annular portion, and a plurality of water conservancy diversion pieces are arranged along the circumference of annular portion, and every water conservancy diversion piece is the heliciform along the circumference of annular portion and upwards extends. In the flow guide element of the embodiment of the invention, the plurality of flow guide sheets extend spirally along the circumferential direction of the annular part, and the flow guide sheets can guide liquid to flow spirally, so that the flow rate of the fluid can be improved, and the fluid transmission efficiency of the heat collection pump is further improved.

Description

Flow guide element, heat collection pump and household appliance

Technical Field

The invention relates to the technical field of electric appliances, in particular to a flow guide element, a heat collection pump and a household appliance.

Background

The heat collecting pump is a device capable of increasing the liquid pressure of the liquid heat collecting pump. The heat collecting pump can be applied to household appliances such as a dish washer and the like, so that the cleaning rate of the household appliances is improved. In the related art, a heating element is provided in the heat collecting pump, and the heating element can heat the liquid in the heat collecting pump. However, the heating element increases the resistance of the fluid, resulting in a lower fluid transmission efficiency of the heat collecting pump.

Disclosure of Invention

The invention provides a flow guide element, a heat collection pump and a household appliance.

An embodiment of the present invention provides a flow guide element, including:

an annular portion; and

the flow deflectors are connected to the periphery of the annular portion and arranged along the circumferential direction of the annular portion, and each flow deflector extends upwards in a spiral shape along the circumferential direction of the annular portion.

In the flow guide element of the embodiment of the invention, the plurality of flow guide sheets extend spirally along the circumferential direction of the annular part, and the flow guide sheets can guide liquid to flow spirally, so that the flow rate of the fluid can be improved, and the fluid transmission efficiency of the heat collection pump is further improved.

In some embodiments, the guide vane includes a first end portion and a second end portion opposite to the first end portion in a circumferential direction of the annular portion, and a gap is formed between the first end portion and/or the second end portion and the annular portion in a radial direction of the annular portion.

In some embodiments, each of the guide vanes includes, in a circumferential direction of the annular portion, a first end portion and a second end portion opposite to the first end portion, the first end portion having a height lower than a height of the second end portion;

the second end of one of the guide vanes is higher than the first end of the other guide vane in two adjacent guide vanes arranged along the circumferential direction of the annular part.

In some embodiments, the guide vane comprises an upwardly facing guide surface and a side surface connecting the guide surface, the guide surface decreasing in width in a direction of the spiral of the guide vane.

In some embodiments, the width of the side faces is equal along the spiral direction of the guide vane.

In some embodiments, the flow directing element comprises a support post extending downwardly from the flow deflector in the axial direction of the annulus.

In some embodiments, the flow guide element comprises a water inlet portion extending from the annular portion in an axial direction of the annular portion, the water inlet portion being formed with a water inlet passage.

An embodiment of the present invention provides a heat collecting pump, including:

a housing; and

the flow directing element of any of the above claims, disposed in the housing.

In the heat collection pump of the embodiment of the invention, the plurality of flow deflectors spirally extend along the circumferential direction of the annular part, and the flow deflectors can guide liquid to spirally flow, so that the flow velocity of the fluid can be improved, and the fluid transmission efficiency of the heat collection pump is further improved.

In some embodiments, the heat collecting pump includes an impeller disposed in the housing, the impeller is located below the guide element, and a distance between an end of the guide vane close to the impeller and a bottom of the impeller is greater than or equal to half a thickness of the impeller.

The embodiment of the invention provides a household appliance, which comprises the heat collecting pump.

In the household appliance provided by the embodiment of the invention, the plurality of flow deflectors spirally extend along the circumferential direction of the annular part, and the flow deflectors can guide liquid to spirally flow, so that the flow velocity of the fluid can be improved, and the fluid transmission efficiency of the heat collection pump is further improved.

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 view of a home appliance according to an embodiment of the present invention;

FIG. 2 is a schematic plan view of a heat collection pump according to an embodiment of the present invention;

FIG. 3 is a cross-sectional schematic view of a heat collection pump according to an embodiment of the present invention;

FIG. 4 is an exploded schematic view of a heat collection pump according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a flow directing element according to an embodiment of the present invention;

fig. 6 is a schematic plan view of a flow directing element according to an embodiment of the present invention.

Description of the main element symbols:

the household appliance 100, the shell 101, the accommodating space 1011,

The heat collecting pump 10, the housing 11, the upper shell 111, the water inlet 1112, the water outlet 1113, the fluid passage 1114, the heating member 1115, the lower shell 112, the impeller 12, the motor 13, the pump,

the flow guide element 20, the annular part 21, the flow guide sheet 22, the first end part 221, the second end part 222, the gap 223, the flow guide surface 224, the side surface 225, the support column 23, the water inlet part 24, the water inlet channel 241, the flow guide cover 30 and the spiral surface 31.

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 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 "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

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; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1, in the household appliance 100 according to the embodiment of the present invention, the household appliance 100 includes a housing 101 and a heat collecting pump 10, the housing 101 forms an accommodating space 1011, the heat collecting pump 10 is installed in the accommodating space 1011, the heat collecting pump 10 is used for receiving a fluid and heating the fluid, and then the heated hot water is sprayed to the accommodating space 1011 to clean an object in the accommodating space 1011.

Further, the household appliance 100 may include a spray arm (not shown), the spray arm is used for spraying hot water to the accommodating space 1011, the heat collecting pump 10 is communicated with the spray arm, the heat collecting pump 10 heats the water after receiving the fluid, and then conveys the heated hot water to the spray arm, and then the spray arm sprays the received hot water to the accommodating space 1011, and the arrangement of the spray arm enables the hot water to be sprayed to a predetermined direction, which is beneficial to cleaning objects in the accommodating space 1011. It is understood that in other embodiments, the spray arm may be omitted, and the hot water spraying operation may be directly performed on the accommodating space 1011 through the heat collecting pump 10. Whether the spray arm is arranged or not can be considered according to actual conditions, and the arrangement is not limited herein.

Further, the household appliance 100 may be a dishwasher (e.g., a drawer dishwasher and a sink dishwasher), a washing machine (e.g., a drawer washing machine and a sink washing machine), or the like. The housing 101 may be made of a metal material. For example, the housing 101 may be made of light aluminum, so that the weight of the household appliance 100 can be reduced, and the user can use the household appliance 100 conveniently. Of course, in other embodiments, the housing 101 may be made of other materials. The specific material of the housing 101 may be designed according to practical situations, and is not limited herein.

Referring to fig. 2 to 4, in the present embodiment, the heat collecting pump 10 includes a housing 11, an impeller 12, and a flow guiding element 20. Both the flow guiding element 20 and the impeller 12 are arranged in the housing 11. In particular, the impeller 12 is located below the flow-guiding element 20. The housing 11 is configured to protect the flow guide element 20 to prevent the flow guide element 20 from being damaged due to collision of the flow guide element 20 with an external structure.

In addition, the provision of the housing 11 facilitates the mounting of the impeller 12. Wherein, the housing 11 can be made of light material. For example, the housing 11 may be made of aluminum, high temperature resistant plastic. This can reduce the overall weight of the heat collecting pump 10, thereby reducing the weight of the entire household appliance 100. It will be appreciated that in other embodiments, the housing 11 may be made of other materials. The specific material of the housing 11 is not limited herein. The shell 11 only needs to have the advantages of high hardness, strong corrosion resistance, high temperature resistance and light weight.

Referring to fig. 2 to 4, in particular, the housing 11 includes an upper case 111 and a lower case 112 detachably coupled to each other. So, when the component (for example, water conservancy diversion component 20) in shell 11 appears damaging, the user can be comparatively convenient dismantle shell 11, then maintain or change the component in shell 11, convenient and fast promotes user experience. The detachable connection between the upper shell 111 and the lower shell 112 may be a rotary fastening connection, a clamping connection, a screw locking connection, or the like. Of course, in other embodiments, other connection manners may be adopted, and are not limited specifically. It is only necessary that the upper case 111 and the lower case 112 be detachably coupled.

It is understood that, in an example, the upper shell 111 and the lower shell 112 may also be integrally formed, specifically, integrally formed by injection molding, integrally welded, or the like. The specific choice may be made in different situations. And are not limited herein.

Referring to fig. 2 to 4, in the present embodiment, the upper shell 111 is formed with a water inlet 1112, a water outlet 1113, and a fluid passage 1114 communicated with the water outlet 1113, the fluid passage 1114 is communicated with the water outlet 1113, a heating member 1115 is disposed in the fluid passage 1114, and the fluid guiding element 20 is disposed in the fluid passage 1114, so that water guided out by the fluid guiding element 20 can flow in the fluid passage 1114 in a vortex shape, thereby facilitating the contact of the fluid with the heating member 1115 to increase the heating efficiency of the fluid, and increasing the flow rate of the fluid to enable the fluid to sufficiently enter the water outlet 1113 and flow out from the water outlet 1113, thereby improving the fluid transmission efficiency and hydraulic performance of the heat collecting pump 10.

Specifically, the heating element 1115 includes, but is not limited to, a heated tube heater, a coated resistive heater, and the like. The specific type can be selected according to actual conditions. And are not limited herein.

Referring to fig. 3, in some embodiments, a motor 13 is disposed in the heat collecting pump 10, specifically, an impeller 12 is disposed in the lower shell 112, the motor 13 is connected to the impeller 12, the motor 13 is used for driving the impeller 12 to rotate, and the motor 13 may be a synchronous motor, an asynchronous ac motor, a dc brushless motor, or the like.

In this embodiment, the impeller 12 is located within the fluid passage 1114. So configured, in case that the motor 13 drives the impeller 12 to rotate, the impeller 12 can make the fluid in the fluid passage 1114 form a vortex shape to increase the flow rate of the fluid, thereby improving the fluid transmission efficiency and hydraulic performance of the heat collecting pump 10.

Referring to fig. 4 to 6, further, the flow guiding element 20 includes an annular portion 21, a plurality of flow guiding plates 22, a supporting column 23 and a water inlet portion 24. A plurality of guide vanes 22 connect the periphery of the annular portion 21. The plurality of guide vanes 22 are arranged along the circumferential direction of the annular portion 21, and each guide vane 22 extends spirally upward along the circumferential direction of the annular portion 21. The support column 23 extends from the guide piece 22 in the axial direction of the annular portion 21. The water inlet portion 24 extends from the annular portion 21 in the axial direction of the annular portion 21.

In the flow guiding element 20 of the above embodiment, the plurality of flow guiding plates 22 each extend spirally along the circumferential direction of the annular portion 21, and the flow guiding plates 22 can guide the liquid to flow spirally, so that the flow rate of the fluid can be increased, and the fluid transmission efficiency of the heat collecting pump 10 can be improved.

Referring to fig. 4 and 5, specifically, the supporting columns 23 and the water inlet portion 24 are respectively located at two sides of the annular portion 21, and in the present embodiment, each of the guide vanes 22 is formed with one supporting column 23. It is understood that in other embodiments, a plurality of support columns 23 may be provided for each guide vane 22, and the specific number of support columns 23 may be selected according to different situations, which is not limited herein.

The supporting columns 23 are arranged to facilitate the installation and positioning of the flow guiding element 20, so as to limit the relative position of the flow guiding element 20 and the housing 11, and improve the stability of the flow guiding element 20 and the housing 11.

The supporting column 23 and the flow deflector 22 can be integrally formed, so that the number of parts to be assembled can be reduced, and the structure of the flow guiding element 20 can be simplified. Of course, in other embodiments, the supporting column 23 and the flow deflector 22 may be formed separately. For example, the connection can be made by gluing, clipping, screwing, etc. The specific connection mode may be set according to actual situations, and is not limited herein.

In the embodiment of the present application, the supporting column 23 may be in a rectangular block shape, in other embodiments, the supporting column 23 may also be in other shapes, and the specific shape of the supporting column 23 may be set according to different situations, which is not limited herein.

Referring to fig. 5 and 6, further, the water inlet portion 24 is formed with a water inlet channel 241, and the fluid can enter the flow guiding element 20 through the water inlet channel 241 and then be guided out through the flow guiding plate 22, so that the fluid can flow spirally, and the flow rate of the fluid is increased, thereby increasing the fluid transmission efficiency of the heat collecting pump 10.

In the embodiment of the present application, the water inlet portion 24 and the water inlet channel 241 are both cylindrical, but of course, in other embodiments, the water inlet portion 24 and the water inlet channel 241 may also be in other shapes, such as rectangular, trapezoidal, and the like. The specific shapes of the water inlet portion 24 and the water inlet channel 241 can be selected according to actual conditions, and are not limited herein.

Referring to fig. 3 again, in the present embodiment, the water inlet 1112 of the upper shell 111 is sleeved on the water inlet portion 24, so as to prevent the fluid from flowing into the fluid channel 1114 from the gap between the upper shell 111 and the water inlet portion 24, which is beneficial to the normal operation of the heat collecting pump 10.

Referring to fig. 4 and 5, specifically, the guide vane 22 includes a first end 221 and a second end 222 opposite to the first end 221, the first end 221 and the second end 222 are arranged along a circumferential direction of the annular portion 21, and a gap 223 is formed between the first end 221 and/or the second end 222 and the annular portion 21 along a radial direction of the annular portion 21.

With such an arrangement, the connection area between the guide vane 22 and the annular portion 21 can be reduced to reduce the resistance between the fluid and the guide vane 22, so that the fluid flows more smoothly when the guide vane 22 guides the fluid, thereby reducing the flow loss of the hydraulic power.

Further, the first end 221 has a height lower than that of the second end 222.

With such an arrangement, when the fluid passes through the second end portion 222 from the first end portion 221 and flows out of the baffle 22, the fluid can easily form a spiral shape, and at this time, the spiral fluid flow rate is higher, so that the fluid can better enter the fluid passage 1114 and contact the heating element 1115, thereby improving the heating efficiency of the heat collection pump 10.

In the present embodiment, the second end 222 of one of the guide vanes 22 is higher than the first end 221 of the other guide vane 22 in two adjacent guide vanes 22 arranged along the circumferential direction of the annular portion 21.

With this configuration, when the fluid flows out along the flow deflector 22, the fluid can easily form a spiral shape, and at this time, the spiral fluid flow rate is higher, so that the fluid can better enter the fluid passage 1114 and contact the heating element 1115, thereby improving the heating efficiency of the heat collection pump 10.

In particular, the deflector 22 and the annular portion 21 may be integrally formed, so that the number of parts required to be assembled is reduced, and the structure of the deflector element 20 is simplified. Of course, in other embodiments, the deflector 22 and the annular portion 21 may be formed separately, and may be connected by gluing, clamping, screwing, or the like. The specific connection mode may be set according to actual situations, and is not limited herein.

Referring to fig. 4 and 5, further, the guide vane 22 includes an upward-facing guide surface 224 and a side surface 225 connecting the guide surface 224, and the width of the guide surface 224 decreases along the spiral direction of the guide vane 22.

In the embodiment of the present application, the fluid flows along the surface of the flow guiding surface 224, and along the spiral direction of the flow guiding plate 22, the width of the flow guiding surface 224 is reduced, so that the contact area between the fluid and the flow guiding surface 224 is also gradually reduced, and thus, the resistance brought by the flow guiding surface 224 to the fluid can be reduced, the loss of the fluid flowing is reduced, the flow rate of the fluid is increased, the fluid flowing out from the flow guiding surface 224 can better form a spiral water flow, and the fluid transmission efficiency of the heat collecting pump 10 is improved.

The side surface 225 is configured to prevent the fluid from flowing out from the periphery of the baffle surface 224 when flowing on the surface of the baffle surface 224, so that the fluid can sufficiently pass through the baffle surface 224 and flow out from the baffle 22, so as to form a spiral water flow, thereby improving the fluid transmission efficiency of the heat collecting pump 10.

In the present embodiment, the baffle 22 is disposed to enable the fluid to form a spiral shape in the fluid passage 1114, and the motor 13 and the impeller 12 are also disposed to enable the fluid to form a spiral shape in the fluid passage 1114, and both of them work simultaneously, so that the flow rate of the fluid in the fluid passage 1114 is faster, and the formed spiral is more obvious, so as to further improve the fluid transmission efficiency of the heat collecting pump 10.

Wherein, the rotation direction of the impeller 12 is the same as the spiral direction of the guide vane 22.

Further, in the present embodiment, the width of the side surface 225 is equal along the spiral direction of the baffle 22.

Thus, the formation and manufacture of the guide vane 22 are simple, and the mass production of the guide vane 22 is improved, so that the mass production of the flow guide element 20 and the heat collecting pump 10 is improved.

It is understood that in other embodiments, the width of the side 225 may not be the same along the spiral direction of the baffle 22. The width of the side 225 may be set according to different situations. And are not limited herein.

Referring to fig. 3, in some embodiments, the distance h between the end of the guide vane 22 close to the impeller 12 and the bottom of the impeller 12 is greater than or equal to half the thickness g of the impeller 12.

With the arrangement, under the condition that the impeller 12 works, the impeller 12 is not influenced by the guide vane 22, and the working stability of the impeller 12 is improved.

In addition, it is arranged that a certain space exists between the impeller 12 and the baffle 22, the space can be used for storing fluid which is not formed into a vortex shape, and under the condition that the impeller 12 works, the fluid stored in the space can be formed into a vortex shape, so that the fluid transmission efficiency of the heat collecting pump 10 is improved.

Of course, the distance h between the end of the guide vane 22 close to the impeller 12 and the bottom of the impeller 12 may not be more than half of the thickness g of the impeller 12, and the specific value may be selected according to practical situations. And are not limited herein.

Referring to fig. 4, in some embodiments, a flow guiding cover 30 is disposed between the flow guiding element 20 and the upper shell 111, and a spiral surface 31 is formed on a side of the flow guiding cover 30 close to the flow guiding element 20, so that when the fluid in the fluid passage 1114 passes through the spiral surface 31, the spiral performance of the fluid can be further improved, thereby improving the fluid transmission efficiency of the heat collecting pump 10.

Further, the following explains the operation of the heat collection pump of the present application:

referring to fig. 2, the fluid a and the fluid B enter the heat collecting pump 10 from the water inlet 1112, and then form a vortex in the fluid passage 1114 under the action of the flow guiding element 20 and the impeller 12, and finally flow out from the water outlet 1113.

Specifically, the following explains how vortices are formed within the fluid passage 1114:

referring to fig. 3, the fluid enters the water inlet channel 214 from the water inlet 1112, and then enters the baffle 22 from the fluid channel 214, and under the guidance of the baffle 22, the fluid flows out from the second end 222 of the baffle 22, and because the second end 222 has a certain height, the fluid flowing out from the second end 222 is easy to form a vortex.

In addition, when impeller 12 is in operation, fluid within fluid passage 1114 can be further acted upon to cause the fluid within fluid passage 1114 to substantially swirl.

In summary, in the household appliance 100, the heat collecting pump 10 and the flow guiding element 20 according to the embodiment of the present invention, the plurality of flow guiding plates 22 each extend spirally along the circumferential direction of the annular portion 21, and the flow guiding plates 22 can guide the liquid to flow spirally, so as to increase the flow velocity of the fluid and further improve the fluid transmission efficiency of the heat collecting pump 10. Also, the impeller 12 operates to also form the fluid in the fluid passage 1114 into a spiral shape, and the two cooperate to form the fluid into a spiral shape sufficiently, thereby increasing the flow rate of the fluid and improving the fluid transmission efficiency of the heat collecting pump 10.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., 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, schematic representations of the above terms 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 present 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. Flow guiding element for a heat collecting pump, characterized in that it comprises:

an annular portion; and

the guide vanes are connected to the periphery of the annular part and are arranged along the circumferential direction of the annular part, and each guide vane extends upwards spirally along the circumferential direction of the annular part;

the guide vane comprises a first end part and a second end part opposite to the first end part along the circumferential direction of the annular part, and a gap is formed between the first end part and/or the second end part and the annular part along the radial direction of the annular part; wherein

In the axial projection direction of the annular part, a second gap is formed between the first end part and the second end part of the adjacent guide vanes.

2. Flow directing element according to claim 1, wherein each flow deflector comprises, in the circumferential direction of the annular portion, a first end and a second end opposite to the first end, the first end having a lower height than the second end;

3. Flow directing element according to claim 1, wherein the flow directing sheet comprises an upwardly facing flow directing surface and sides connecting the flow directing surface, the width of the flow directing surface decreasing in the direction of the spiral of the flow directing sheet.

4. Flow directing element according to claim 3, wherein the sides are of equal width in the spiral direction of the flow deflector.

5. Flow directing element according to claim 1, wherein the flow directing element comprises a support column extending from the flow deflector downwards in the axial direction of the annular portion.

6. Flow directing element according to claim 1, characterised in that the flow directing element comprises a water inlet portion extending from the annular portion in the axial direction of the annular portion, the water inlet portion being formed with a water inlet channel.

7. A heat collection pump, characterized in that it comprises:

a housing; and

the flow directing element of any one of claims 1-6, disposed in the housing.

8. Heat collection pump according to claim 7, characterized in that it comprises an impeller placed in said shell, said impeller being located below said flow-guiding element, the distance between the end of said flow-guiding blade close to said impeller and the bottom of said impeller being greater than or equal to half the thickness of said impeller.

9. Household appliance, characterized in that it comprises a heat collection pump according to claim 7 or 8.