CN207920923U - Without spiral case air-conditioning draught fan and air conditioner indoor unit - Google Patents

Abstract

This application relates to a volute-less air-conditioning fan and an air-conditioning indoor unit. The volute-less air-conditioning fan includes a fan box, an impeller and a motor; In the fan box, the central axis of the impeller is fixedly connected to the motor shaft, and the motor is fixedly arranged in the fan box; the diversion inlet, the air inlet of the impeller and the motor shaft are all located on the same straight line; The air inlet of the impeller is arranged at the diversion inlet; a deflector is also arranged in the fan box, and the deflector is used to change the direction of the wind after the impeller rotates, and the deflector passes through the deflector. The deflected wind is exported from the air outlet. The volute-case-free air-conditioning fan of the present application can reduce the eddy current loss in the fan box and improve the efficiency of the fan.

Description

No volute air conditioner fan and air conditioner indoor unit

technical field

The application belongs to the technical field of air-conditioning fans, and in particular relates to a volute-less air-conditioning fan and an air-conditioning indoor unit.

Background technique

With the upgrading of consumption of home appliances, household air conditioners have also been upgraded from traditional simple air conditioning temperature adjustment to full-dimensional adjustment of temperature and humidity, fresh air, cleanliness, and airflow organization. higher requirements. Existing household air conditioners generally use a cross-flow fan, an axial fan or a centrifugal fan with a volute. However, the pressure head provided by the cross-flow fan is small; the installation form of the axial-flow fan is not suitable; the centrifugal fan with a volute has a high outlet wind speed and a large dynamic pressure, but the static pressure efficiency is low. When the fan outlet blows to the evaporator, due to the wind speed High and concentrated wind, so that the windward side of the evaporator receives wind unevenly, affecting the heat exchange efficiency of the heat exchanger.

Contents of the invention

In order to overcome the problems in the related art at least to a certain extent, the present application provides a volute-less air-conditioning fan.

According to the first aspect of the embodiment of the application, the application provides a volute-less air-conditioning fan, which includes a fan box, an impeller and a motor; the fan box is provided with a flow guide inlet and an air outlet, and the impeller and the motor are all arranged in the fan box, the central shaft of the impeller is fixedly connected with the motor shaft, and the motor is fixedly arranged in the fan box; the diversion inlet, the air inlet of the impeller and the motor shaft are all located on the same On a straight line; the air inlet of the impeller is arranged at the diversion inlet; a deflector is also arranged in the fan box, and the deflector is used to change the direction of the wind after the impeller rotates, and the The wind deflected by the deflector is exported from the air outlet.

Further, the fan box adopts a rectangular parallelepiped structure, the air diversion inlet is arranged on one side of the fan box, and the air outlet is arranged on the side opposite to the side where the diversion inlet is located; in the fan box , in the direction from the diversion inlet to the air outlet, the impeller and the motor are arranged in sequence; the plane formed by the rotation of the impeller is parallel to the plane where the diversion inlet is located;

The deflector is arranged at the inlet of the deflector, and the deflector adopts an annular curved surface structure, and the diameter of one end of the annular curved surface structure is smaller than the diameter of the opposite end; the end of the annular curved surface structure with a smaller diameter is connected to the The projection of the front cover plate of the impeller on the inner wall of the fan box where the diversion inlet is located coincides, and the end of the annular curved surface structure with a larger diameter is connected to the inner wall of the fan box.

Furthermore, the annular curved surface structure is obtained by rotating a curved section around the central axis in the horizontal direction of the fan box, and the starting point of the curved section is a point on the top of the front cover plate of the impeller where the flow guide inlet is located. The projection on the inner wall of the fan box, the end point of the curve segment is the projection of a point on the top of the rear cover plate of the impeller on the inner wall adjacent to the inner wall of the fan box where the diversion inlet is located.

Furthermore, the curve segment satisfies the Archimedes spiral equation or the logarithmic spiral equation.

Furthermore, the width and height of the wind box are greater than or equal to 1.6 times the diameter of the impeller.

Further, the fan box adopts a rectangular parallelepiped structure with an arc-shaped bottom surface, the flow guide inlet is arranged on one side of the fan box, and the air outlet is arranged on the top surface of the fan box; in the fan box , from the side where the diversion inlet is located to its opposite side, the impeller and the motor are arranged in sequence, and the plane formed by the rotation of the impeller is parallel to the plane where the diversion inlet is located; the deflector is the arc-shaped bottom surface of the wind box.

Furthermore, the arc-shaped bottom surface of the fan box is obtained by stretching a curved section from the side where the diversion inlet is located to the opposite side, and the two ends of the curved section pass through the impeller respectively. The intersection point of the horizontal line made by the center of the fan box and the inner walls on both sides of the fan box, the horizontal line made by the center of the impeller is parallel to the side where the diversion inlet is located, and the curve segment satisfies the Archimedes spiral equation Or the logarithmic spiral equation.

Furthermore, the installation position of the impeller in the fan box is horizontally right or left, and on the side to which the impeller is biased, the distance between the edge of the impeller and the inner wall of the fan box is greater than or equal to 0.15 times the diameter of the impeller.

According to the second aspect of the embodiments of the present application, the present application further provides an air conditioner indoor unit, which includes the volute-less air conditioner fan.

Further, the air-conditioning indoor unit also includes a flow equalization box, the flow equalization box adopts a rectangular structure with two ends open, the inlet of the flow equalization box is equal to the air outlet of the fan box, and the flow equalization box The outlet of the evaporator is facing the projection of the evaporator on the horizontal plane.

The technical solution provided by the embodiments of the present application may include the following beneficial effects: Compared with the fan with a volute, the present application replaces the volute with a fan box, and a deflector is arranged in the fan box, which can reduce the eddy current loss in the fan box, Improve fan efficiency. The noise can be effectively reduced by arranging sound-insulating and sound-absorbing materials in the fan box.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

Fig. 1 is one of the structural schematic diagrams of a volute-less air-conditioning fan according to an exemplary embodiment.

Fig. 2 is the second structural schematic diagram of a volute-less air-conditioning fan according to an exemplary embodiment.

Fig. 3 is a front view of an air conditioner indoor unit using a volute-less air conditioner fan according to an exemplary embodiment.

Fig. 4 is a side view of an air conditioner indoor unit using a volute-less air conditioner fan according to an exemplary embodiment.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

Fig. 1 is one of the structural schematic diagrams of a volute-less air-conditioning fan according to an exemplary embodiment. As shown in FIG. 1 , the volute-less air-conditioning fan of the present application includes a fan box 1 , an impeller 2 and a motor 3 . The wind box 1 is provided with a guide inlet 11 and an air outlet 12 . Both the impeller 2 and the motor 3 are arranged in the fan box 1, the central axis of the impeller 2 is fixedly connected with the motor 3, and the motor 3 is fixed in the fan box 1 through a bracket. The diversion inlet 11, the air inlet 21 of the impeller 2 and the 3 axes of the motor are all located on the same straight line. The air inlet 21 of the impeller 2 is arranged at the diversion inlet 11 . Preferably, in order to guide all the wind into the air inlet 21 of the impeller 2 , the diversion inlet 11 extends into the air inlet 21 of the impeller 2 , that is, the diversion inlet 11 partially overlaps with the air inlet 21 of the impeller 2 .

A deflector 13 is also arranged in the fan box 1, and the deflector 13 is used to change the direction of the wind after the impeller 2 rotates at a high speed. The wind guided by the deflector 13 is exported from the air outlet 12 .

In a specific embodiment, the fan box 1 adopts a rectangular parallelepiped structure, an air guide inlet 11 is arranged on one side of the fan box 1 , and an air outlet 12 is arranged on the side opposite to the side where the air guide inlet 11 is located. In the fan box 1 , in the direction from the guide inlet 11 to the air outlet 12 , the impeller 2 and the motor 3 are arranged in sequence. The center of the impeller 2 is fixedly connected with the 3 shafts of the motor. The plane formed by the rotation of the impeller 2 is parallel to the plane where the diversion inlet 11 is located. The diameter of one side of the diversion inlet 11 is smaller than the diameter of the air inlet 21 of the impeller 2 , so that one side of the diversion inlet 11 can be recessed into the air inlet 21 of the impeller 2 .

A deflector 13 is arranged at the diversion inlet 11, and the deflector 13 adopts an annular curved surface structure, and the diameter of one end of the annular curved surface structure is smaller than the diameter of the opposite end. The smaller diameter end of the annular curved surface structure coincides with the projection of the front cover plate of the impeller 2 on the inner wall of the fan box 1 where the diversion inlet 11 is located, and the larger diameter end of the annular curved surface structure is connected to the inner wall of the fan box 1 . In this way, the impeller 2 is located in the annular curved surface structure adopted by the deflector 13 . Wind enters the air inlet 21 of the impeller 2 from the guide inlet 11 of the fan box 1 . The rotation of the motor 3 drives the impeller 2 to rotate, and the impeller 2 guides the wind entering the air inlet 21 to the deflector 13, and the wind changes direction after being guided to the deflector 13, and is exported from the air outlet 12 on the side of the fan box 1. The setting of the deflector 13 can optimize the air flow in the fan box 1 and reduce the noise.

Specifically, the formation process of the annular curved surface structure is as follows: starting from the projection of a point on the top of the front cover of the impeller 2 on the inner wall of the fan box 1 where the diversion inlet 11 is located, and starting from a point on the top of the rear cover of the impeller 2 on the inner wall of the guide The projection on the inner wall adjacent to the inner wall of the fan box 1 where the inflow port 11 is located is taken as an end point, and a curved section is made, and the curved section rotates around the horizontal central axis of the fan box 1 to form a ring-shaped curved surface structure.

Further, the curve segment satisfies the Archimedes spiral equation or the logarithmic spiral equation. The design of the deflector 13 can reduce the eddy current loss in the fan box 1, reduce the noise, and improve the efficiency of the fan.

In this embodiment, in order to further reduce noise, the inner wall of the fan box 1 is covered with sound-insulating and sound-absorbing materials. Noise reduction at the source of the noise can effectively reduce the noise.

In this embodiment, the motor 3 adopts an EC motor 3 (brushless direct current variable frequency motor) or a DC motor 3 (direct current variable frequency motor), capable of stepless speed regulation.

In this embodiment, the width and height of the fan box 1 are greater than or equal to 1.6 times the diameter of the impeller 2 . Such a setting can ensure the lowest cost of the volute-less air-conditioning fan while ensuring its optimal performance.

The fan box 1 of this structure is used in a wall-mounted air conditioner indoor unit. When the air-conditioning fan without volute is used in this application, a flow equalization box 4 is provided at the air outlet 12 of the fan box 1, and the flow equalization box 4 adopts a rectangular structure with openings at both ends. The inlet of the equalizer box 4 is equal in size to the air outlet 12 of the fan box 1 . The outlet of the equalizer box 4 is facing the projection of the evaporator 5 on the horizontal plane. The area of the outlet of the equalizer box 4 is greater than or equal to the area of the projection of the evaporator 5 on the horizontal plane. This design makes the cross-sectional wind speed low, the static pressure high, and the cross-sectional wind speed distribution uniform.

In this embodiment, the height of the equalizer box 4 is greater than or equal to 1.2 times the diameter of the impeller 2 . The inner wall of the equalizer box 4 is covered with sound-absorbing and insulating material, which can effectively reduce noise.

Fig. 2 is the second structural schematic diagram of a volute-less air-conditioning fan according to an exemplary embodiment. As shown in FIG. 2 , in a specific embodiment, the fan box 1 adopts a rectangular parallelepiped structure with an arc-shaped bottom. A diversion inlet 11 is arranged on one side of the fan box 1 , and an air outlet 12 is arranged on the top surface of the fan box 1 . In the fan box 1, the impeller 2 and the motor 3 are sequentially arranged in the direction from the side where the guide inlet 11 is located to the opposite side. The center of the impeller 2 is fixedly connected with the 3 shafts of the motor. The plane formed by the rotation of the impeller 2 is parallel to the plane where the diversion inlet 11 is located.

The arc-shaped bottom surface of the fan box 1 serves as a deflector 13 . In this way, the wind enters the air inlet 21 of the impeller 2 from the guide inlet 11 of the fan box 1 . The rotation of the motor 3 drives the impeller 2 to rotate, and the impeller 2 guides the wind entering the air inlet 21 to the deflector 13, and the wind guides to the deflector 13 and changes direction, and is exported from the air outlet 12 on the top surface of the fan box 1. The curved bottom surface of the fan box 1 can optimize the airflow in the fan box 1 and reduce noise.

The formation process of the arc-shaped bottom surface of the fan box 1 is as follows: a horizontal line is drawn through the center of the impeller 2, and the horizontal line is parallel to the side where the diversion inlet 11 is located. Curved section, the curved section is stretched in the direction from the side where the diversion inlet 11 is located to the opposite side, so as to obtain the arc-shaped bottom surface of the fan box 1 .

Further, the curve segment satisfies the Archimedes spiral equation or the logarithmic spiral equation. The design of the curved bottom surface of the fan box 1 can reduce the eddy current loss in the lower part of the fan box 1, reduce noise, and improve the efficiency of the fan.

In this embodiment, in order to further reduce noise, the inner wall of the fan box 1 is covered with sound-insulating and sound-absorbing materials. Noise reduction at the source of the noise can effectively reduce the noise.

In this embodiment, the motor 3 adopts an EC motor 3 (brushless direct current variable frequency motor) or a DC motor 3 (direct current variable frequency motor), capable of stepless speed regulation.

In this embodiment, the width and height of the fan box 1 are greater than or equal to 1.6 times the diameter of the impeller 2 . Such a setting can ensure the lowest cost of the volute-less air-conditioning fan while ensuring its optimal performance.

In this embodiment, the impeller 2 is at the front, and the motor 3 is at the rear, so as to face the direction of the impeller 2. If the turning direction of the impeller 2 is clockwise, the center of the impeller 2 deviates from the central axis of the vertical direction of the fan box 1 to the right. That is, the installation position of the impeller 2 in the fan box 1 is horizontally to the right; if the turning direction of the impeller 2 is counterclockwise, the center of the impeller 2 deviates from the vertical central axis of the fan box 1 to the left, that is, the impeller 2 is in the fan box 1 The installation position is horizontal to the left.

When the impeller 2 deviates from the central axis of the vertical direction of the fan box 1, the side to which the impeller 2 deviates, the distance between the edge of the impeller 2 and the inner wall of the fan box 1 is greater than or equal to 0.15 times the diameter of the impeller 2.

The fan box 1 of this structure is used in vertical air conditioner indoor units. When the air-conditioning fan without volute is used in this application, a flow equalization box 4 is provided at the air outlet 12 of the fan box 1, and the flow equalization box 4 adopts a rectangular structure with openings at both ends. The inlet of the equalizer box 4 is equal in size to the air outlet 12 of the fan box 1 . The outlet of the equalizer box 4 is facing the projection of the evaporator 5 on the horizontal plane. The area of the outlet of the equalizer box 4 is greater than or equal to the area of the projection of the evaporator 5 on the horizontal plane. This design makes the cross-sectional wind speed low, the static pressure high, and the cross-sectional wind speed distribution uniform.

In this embodiment, the height of the equalizer box 4 is greater than or equal to 1.2 times the diameter of the impeller 2 . The inner wall of the equalizer box 4 is covered with sound-absorbing and insulating material, which can effectively reduce noise.

As shown in Figures 3 and 4, the present application also provides an air conditioner indoor unit, which adopts the volute-less air conditioner fan provided by the present application. The air conditioner indoor unit also includes a flow equalization box 4, and the flow equalization box 4 adopts a rectangular structure with openings at both ends.

Regarding the apparatus in the foregoing embodiments, the specific manner in which each module executes operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

It can be understood that, the same or similar parts in the above embodiments can be referred to each other, and the content that is not described in detail in some embodiments can be referred to the same or similar content in other embodiments.

It should be noted that in the description of the present application, terms such as "first" and "second" are used for description purposes only, and should not be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "plurality" means at least two.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. a kind of no spiral case air-conditioning draught fan, which is characterized in that it includes air box, impeller and motor；It is arranged on the air box There are directed fluid inlet and air outlet, the impeller and motor to be arranged in the air box, the central shaft and motor of the impeller Axis is fixedly connected, and the motor is fixed in the air box；The directed fluid inlet, the air inlet of impeller and motor shaft are equal It is located on the same line；The air inlet of the impeller is arranged at directed fluid inlet；It is additionally provided with deflector in the air box, The deflector is for changing with the direction of the postrotational wind of the impeller, and wind after the deflector water conservancy diversion is from the outlet air Mouth export.

2. as described in claim 1 without spiral case air-conditioning draught fan, which is characterized in that the air box uses rectangular parallelepiped structure, institute It states and the directed fluid inlet is set on the one side of air box, on the side opposite with side where the directed fluid inlet described in setting Air outlet；In the air box, from the directed fluid inlet to the direction of the air outlet on, set gradually the impeller and electricity Machine；It is parallel with the plane where the directed fluid inlet that the impeller rotation is formed by plane；

The deflector is arranged at the directed fluid inlet, and the deflector uses annular surface structure, the annular surface knot The diameter of structure one end is less than the diameter of its opposite end；In the annular surface structure before the smaller one end of diameter and the impeller Projection of the cover board on the wind turbine chamber interior wall where the directed fluid inlet overlaps, one be relatively large in diameter in the annular surface structure End is connect with the inner wall of the air box.

3. as claimed in claim 2 without spiral case air-conditioning draught fan, which is characterized in that the annular surface structure by a curved section around The central axes of the air box horizontal direction rotate to obtain, and the starting point of the curved section is one at the top of the front shroud of the impeller Projection of the point on the wind turbine chamber interior wall where the directed fluid inlet, the terminal of the curved section are the back shroud top of the impeller Some projection in the adjacent inner wall of the wind turbine chamber interior wall where the directed fluid inlet in portion.

4. as claimed in claim 3 without spiral case air-conditioning draught fan, which is characterized in that the curved section meets spiral of Archimedes Equation or log spiral equation.

5. as claimed in claim 2 without spiral case air-conditioning draught fan, which is characterized in that the width and height of the air box are all higher than Or the diameter equal to 1.6 times of impellers.

6. as described in claim 1 without spiral case air-conditioning draught fan, which is characterized in that the air box uses bottom surface for the length of arc Cube structure, the directed fluid inlet is arranged on the one side of the air box, and the air outlet is arranged in the top surface of the air box； In the air box, from the side where the directed fluid inlet to the direction of its opposite flank, the impeller is set gradually And motor, it is parallel with the plane where the directed fluid inlet that the impeller rotation is formed by plane；The deflector is described The lower arcuate surface of air box.

7. as claimed in claim 6 without spiral case air-conditioning draught fan, which is characterized in that the lower arcuate surface of the air box is by a curve The side of side to its opposite flank where directed fluid inlet described in Duan Yu is pulled up to obtain, the two-end-point point of the curved section The intersection point of the horizontal line and air box both sides inner wall that are not done for the center of the excessively described impeller, the center institute of the excessively described impeller The horizontal line done is parallel with the side where the directed fluid inlet, and the curved section meets Archimedes spiral equation or right Number helix equation.

8. as claimed in claim 6 without spiral case air-conditioning draught fan, which is characterized in that installation of the impeller in the air box Position to the right or to the left, the side that the impeller is biased to of level, between the edge of the impeller and the inner wall of the air box Away from the diameter more than or equal to 0.15 times of impeller.

9. a kind of air conditioner indoor unit, which is characterized in that it includes if claim 1~8 any one of them is without spiral case air-conditioner wind Machine.

10. air conditioner indoor unit as claimed in claim 9, which is characterized in that further include flowing case, the stream case uses both ends The rectangular configuration of opening, the import of the stream case and the air outlet of the air box are equal sized, the outlet for flowing case The projection of face evaporator in the horizontal plane.