CN218509790U - Centrifugal volute, centrifugal fan and refrigeration equipment - Google Patents
Centrifugal volute, centrifugal fan and refrigeration equipment Download PDFInfo
- Publication number
- CN218509790U CN218509790U CN202221948571.4U CN202221948571U CN218509790U CN 218509790 U CN218509790 U CN 218509790U CN 202221948571 U CN202221948571 U CN 202221948571U CN 218509790 U CN218509790 U CN 218509790U
- Authority
- CN
- China
- Prior art keywords
- centrifugal
- line segment
- volute
- axis
- side wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a centrifugal spiral case, centrifugal fan and refrigeration plant, have centrifugal wind channel in the centrifugal spiral case, in the plane perpendicular to the first axis of centrifugal spiral case, the spiral of centrifugal wind channel extends, the first axis with locate the central axis coincidence of the centrifugal wind wheel in the centrifugal spiral case; the centrifugal air duct has a first side wall and a second side wall opposite in a direction parallel to the first axis, the first side wall extending gradually away from the second side wall in a direction along the first axis and/or the second side wall extending gradually away from the first side wall in a direction along the first axis in a direction along the gas flow direction within the centrifugal air duct. According to the utility model discloses a centrifugal spiral case can make centrifugal wind channel highly increase along the air current flow direction in the primary shaft side for centrifugal wind channel accords with gaseous flow characteristic more, is favorable to improving wind channel efficiency, promotes the amount of wind, reduces the noise.
Description
Technical Field
The utility model belongs to the technical field of the domestic appliance technique and specifically relates to a centrifugation spiral case, centrifugal fan and refrigeration plant are related to.
Background
In the related art, the volute profile of the centrifugal air duct is usually designed by adopting an equidistant quadrilateral method and an unequal quadrilateral method, the volute profile of the transverse profile of the centrifugal air duct follows an Archimedes spiral equation, fluid uniformly flows out along the circumference of the wind wheel, the transverse section of the centrifugal air duct is continuously increased, and the flow passing through different sections is in direct proportion to the included angle between the section and the initial section of the volute. While the flow cross-section of its longitudinal section is rectangular, i.e. the longitudinal section through which the gas passes remains constant. The scheme cannot fully follow the gas flow characteristic, and is not beneficial to improving the air duct efficiency, improving the air quantity and reducing the noise.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a centrifugal volute, centrifugal volute can make centrifugal wind channel highly increase along the air current flow direction gradually in the primary axis orientation for centrifugal wind channel accords with gaseous flow characteristic more, thereby further is favorable to improving wind channel efficiency, promotes the amount of wind and reduces centrifugal fan's noise.
The utility model discloses still provide a centrifugal fan who has above-mentioned centrifugal spiral case.
The utility model discloses still provide a refrigeration plant who has above-mentioned centrifugal fan.
According to the utility model discloses the centrifugal spiral case of first aspect, have centrifugal wind channel in the centrifugal spiral case, perpendicular to in the plane of the first axis of centrifugal spiral case, centrifugal wind channel spiral extends, first axis with locate the coincidence of the central axis of the centrifugal wind wheel in the centrifugal spiral case, centrifugal wind channel has in being on a parallel with relative first lateral wall and second lateral wall in the direction of first axis are following on the gas flow direction in the centrifugal wind channel, first lateral wall is following keep away from gradually in the direction of first axis the second lateral wall extends, and/or, the second lateral wall is following keep away from gradually in the direction of first axis first lateral wall extends.
According to the utility model discloses a centrifugal spiral case can make centrifugal wind channel highly increase along the air current flow direction gradually in the side that is on a parallel with first axis for centrifugal wind channel accords with gaseous flow characteristic more, thereby further is favorable to improving wind channel efficiency, promotes the amount of wind and reduces centrifugal fan's noise.
In some embodiments, the centrifugal air duct extends along an archimedes spiral in a plane perpendicular to the first axis of the centrifugal volute.
In some embodiments, the first and second sidewalls each extend along a logarithmic spiral in a direction parallel to the first axis.
In some embodiments, the contour line of any radial cross-section of the centrifugal air duct includes a first line segment, a second line segment, a third line segment, and a fourth line segment, the first line segment being opposite the second line segment in a radial direction of the centrifugal volute, the third line segment and the fourth line segment are opposed in a direction parallel to the first axis, and the opening degree of the third line segment and the fourth line segment of any one radial cross section in a direction parallel to the first axis
Satisfies the following conditions:
wherein, the first and the second end of the pipe are connected with each other,
the included angle (radian) between any radial section and the radial initial section of the centrifugal air duct;
the opening degree of the first line segment and the second line segment in the radial direction of the centrifugal volute,
is a monotonically increasing function.
In some embodiments, the monotonically increasing function
Satisfies the following conditions:
wherein k is a coefficient and k =0,1,2, \8230; p is the pitch of the logarithmic spiral; b 0 Opening degrees of a third line segment and a fourth line segment of the initial section; r is the diameter of the wind wheel arranged in the centrifugal volute; m is a coefficient related to the specific rotation speed of the centrifugal fan.
In some embodiments, the contour line of any radial section of the centrifugal air duct includes a first line segment and a second line segment, the first line segment and the second line segment are opposite in the radial direction of the centrifugal volute, and the opening degree of the first line segment and the second line segment in the radial direction of the centrifugal volute is equal to the opening degree of the first line segment and the second line segment in the radial direction of the centrifugal volute
Satisfies the following conditions:
according to the utility model discloses centrifugal fan of second aspect, include the wind wheel and according to the utility model discloses the centrifugal spiral case of first aspect, centrifugal wind wheel locates in the centrifugal spiral case.
According to the utility model discloses a centrifugal fan, through setting up the centrifugal spiral case of above-mentioned first aspect, on the air current flow direction in centrifugal wind channel, make at least one in first lateral wall and the second lateral wall keep away from another extension on the axis direction of centrifugal spiral case gradually, therefore, can make centrifugal wind channel highly increase along the air current flow direction gradually in the axial direction, make centrifugal wind channel accord with gaseous flow characteristic more, thereby further be favorable to improving wind channel efficiency, promote the amount of wind and reduce centrifugal fan's noise, and then improved centrifugal fan's wholeness ability.
In some embodiments, the centrifugal fan further includes a wind guiding ring disposed coaxially with the centrifugal volute, the wind guiding ring is disposed at least one end of the centrifugal volute in a direction parallel to the first axis, a wind guiding surface is formed on the wind guiding ring, and the wind guiding surface extends spirally towards the centrifugal wind wheel along a circumferential direction of the wind guiding ring in an axial direction of the wind guiding ring.
In some embodiments, in the axial direction of the centrifugal fan, an end surface of the air guide ring facing the centrifugal wind wheel is a plane perpendicular to the axis of the centrifugal fan.
In some embodiments, the wind-guiding ring is integrally formed with the centrifugal volute.
According to the utility model discloses the refrigeration plant of third aspect, include according to the utility model discloses the centrifugal fan of second aspect.
According to the utility model discloses a refrigeration plant is through setting up the centrifugal fan of above-mentioned second aspect to refrigeration plant's wholeness ability has been 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
Figure 1 is a schematic diagram of a centrifugal volute according to an embodiment of the invention;
FIG. 2 is a schematic view of another angle of the centrifugal volute shown in FIG. 1;
FIG. 3 is a schematic diagram of a top view of the centrifugal volute shown in FIG. 1;
FIG. 4 is a schematic illustration of a side view of the centrifugal volute shown in FIG. 2;
fig. 5 is a schematic view of a centrifugal fan according to an embodiment of the present invention;
fig. 6 is a schematic diagram comparing the air volume between the centrifugal volute and the volute (general volute) in the background art according to the embodiment of the present invention;
fig. 7 is a distribution cloud of surface broadband noise of a related art volute (normal volute);
fig. 8 is a cloud diagram of the distribution of the surface broadband noise of the centrifugal scroll according to the embodiment of the present invention;
fig. 9 is a schematic power comparison diagram of the centrifugal volute and the volute in the background art (normal volute) according to the embodiment of the present invention.
Reference numerals:
100. a centrifugal fan;
10. a centrifugal volute; l, a first axis;
11. a centrifugal air duct; 111. a first side wall; 112. a second side wall;
a. a first line segment; b. a second line segment; c. a third line segment; d. a fourth line segment;
20. an air guide ring.
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 drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
A centrifugal scroll 10 according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1-5.
As shown in fig. 1, a centrifugal volute 10 according to an embodiment of the first aspect of the present invention is used to guide air leaving a wind wheel to a volute outlet and convert a part of kinetic energy of the air into static pressure.
Specifically, the centrifugal volute 10 of the present embodiment has a centrifugal air duct 11 therein, and the centrifugal air duct 11 extends spirally from inside to outside in a radial direction in a plane perpendicular to the first axis L of the centrifugal volute 10. Wherein the first axis L coincides with a central axis of a centrifugal wind wheel provided in the centrifugal volute 10. The air leaving from the wind wheel enters the centrifugal air duct 11 and spirally moves to the air outlet of the air duct from inside to outside along the centrifugal air duct 11. Because the motion trail of the fluid particles in the centrifugal fan 100 is a spiral line (e.g. a logarithmic spiral line), the centrifugal air duct 11 in the volute can conform to the flowing characteristic of the gas by extending the centrifugal air duct 11 along the spiral line in the projection plane perpendicular to the axis, thereby being beneficial to improving the air duct efficiency, improving the air volume and reducing the noise of the centrifugal fan 100.
In the centrifugal fan 100 of the related art, the centrifugal air duct 11 has two axially opposite side walls, and the distance between the two side walls in the axial direction of the centrifugal volute 10 is kept constant between the air inlet and the air outlet of the centrifugal air duct 11. This does not conform to the gas flow characteristics within the centrifugal fan 100, affects the wind path of the centrifugal fan 100, and causes a loud noise.
To solve the above technical problem, in the present embodiment, the centrifugal wind tunnel 11 has a first sidewall 111 and a second sidewall 112, the first sidewall 111 and the second sidewall 112 are opposite in an axial direction (e.g., up-down direction shown in fig. 1) of the centrifugal scroll 10, that is, the first sidewall 111 and the second sidewall 112 are opposite in a direction parallel to the first axis L, in a gas flow direction along the centrifugal wind tunnel 11, the first sidewall 111 extends gradually away from the second sidewall 112 in a direction along the first axis L, and/or the second sidewall 112 extends gradually away from the first sidewall 111 in a direction along the first axis L. In other words, at least one of the first side wall 111 and the second side wall 112 extends gradually away from the other in the axial direction of the centrifugal scroll 10. That is, the distance between the first sidewall 111 and the second sidewall 112 gradually increases in a direction spirally extending from inside to outside in the radial direction of the centrifugal scroll 10. For example, the first axis L of the centrifugal scroll 10 extends up and down, the centrifugal duct 11 has a first sidewall 111 and a second sidewall 112 opposite to each other, the first sidewall 111 is on the upper side of the second sidewall 112, and in a direction radially outward from the inner spiral, the first sidewall 111 extends gradually obliquely upward, and the second sidewall 112 extends gradually obliquely downward. From this, can make centrifugal wind channel 11 highly increase along the air current flow direction gradually in first axis L direction for centrifugal wind channel 11 accords with gaseous flow characteristic more, thereby further is favorable to improving wind channel efficiency, promotes the amount of wind and reduces centrifugal fan 100's noise.
According to the utility model discloses centrifugal volute 10, on the air current flow direction of centrifugal wind channel 11, another extension is kept away from gradually in the direction of the primary shaft L of centrifugal volute 10 to at least one in first lateral wall 111 and the second lateral wall 112, therefore, can make centrifugal wind channel 11 highly increase gradually along the air current flow direction in the primary shaft L side, make centrifugal wind channel 11 accord with gaseous flow characteristic more, thereby further be favorable to improving wind channel efficiency, promote the amount of wind and reduce centrifugal fan 100's noise.
In one embodiment of the invention, the centrifugal air duct 11 extends along an archimedes spiral in a plane perpendicular to the first axis L of the centrifugal volute 10, as shown in fig. 3. For example, as shown in fig. 3, the centrifugal duct 11 has a spiral projection line extending spirally from inside to outside in the radial direction in a projection plane perpendicular to the first axis L of the centrifugal scroll 10, and the spiral projection line satisfies an archimedes spiral. Therefore, the radial width change of the centrifugal air duct 11 can be made to conform to the flowing characteristic of the air, thereby being beneficial to improving the air duct efficiency, improving the air quantity and reducing the noise of the centrifugal fan 100.
In an embodiment of the present invention, referring to fig. 4, in a direction parallel to the first axis L of the centrifugal scroll 10, the first sidewall 111 and the second sidewall 112 both extend along a logarithmic spiral. For example, in a projection plane through the first axis L of the centrifugal volute 10, the first sidewall 111 extends along a logarithmic spiral, and the second sidewall 112 also extends along a logarithmic spiral. Therefore, the height change of the centrifugal air duct 11 on the first axis L of the centrifugal volute 10 can further conform to the flowing characteristic of the gas, thereby further improving the air duct efficiency, improving the air volume and reducing the noise of the centrifugal fan 100.
In a specific example of the present invention, as shown in fig. 1, fig. 3 and fig. 4, the contour line of any radial section of the centrifugal wind duct 11 includes a first line segment a, a second line segment b, a third line segment c and a fourth line segment d, the first line segment a and the second line segment b are opposite in the radial direction of the centrifugal volute 10, the third line segment c and the fourth line segment d are opposite in the direction parallel to the first axis L of the centrifugal volute 10, and the opening degree of any radial section of the third line segment c and the fourth line segment d in the direction parallel to the first axis L of the centrifugal volute 10
Satisfies the following conditions:
wherein, the first and the second end of the pipe are connected with each other,
is the angle between any radial section and the initial section of the centrifugal air duct 11, and
is a radian;
the opening degree of the first line segment a and the second line segment b in the radial direction of the centrifugal scroll 10,
is a monotonically increasing function.
Since the radial opening degree of the centrifugal volute 10 can be obtained by querying the design specification during the design process of the centrifugal volute 10, the present embodiment utilizes the radial opening degree of the centrifugal volute 10
The opening degree of the centrifugal volute 10 in the direction parallel to the first axis L is calculated
From this, it is not only convenient to derive the opening degree of the centrifugal scroll 10 in the direction parallel to the first axis L
Improving the design efficiency of the centrifugal scroll (10) by the opening degree in the radial direction
Opening in a direction parallel to the first axis L
In a related manner, the centrifugal air duct 11 more conforming to the gas flow characteristic can be obtained, the air duct efficiency is further improved, the air volume is increased, and the noise of the centrifugal fan 100 is reduced.
In some examples, the opening degree of the centrifugal scroll 10 in the direction parallel to the first axis L described above
In the formula (2), wherein the function is monotonically increasing
Can satisfy the following conditions:
wherein k is coefficient and k =0,1,2, \8230;. That is, k is a positive integer and is 1,2, 3, 4, \8230;, where k takes on a value and an included angle
In connection with, particularly when
When k is 0, when
In time, k is 1, and so on.
Wherein p is the pitch of the logarithmic spiral; the pitch is used to adjust the magnitude of the spiral extension of the first side wall 111 and the second side wall 112 in the axial direction of the centrifugal scroll 10, wherein the pitch can be set according to actual requirements. B is 0 The opening degree of the third line segment c and the fourth line segment d, which are radial initial cross sections of the centrifugal air duct 11, in the axial direction of the centrifugal volute 10. R is the diameter of the wind wheel arranged in the centrifugal volute 10 in unitIs mm. m is a coefficient relating to the specific speed of the centrifugal fan 100, that is, m is a coefficient defined by the specific speed n of the centrifugal fan 100 itself s And (6) determining.
In this embodiment, the monotonically increasing function satisfies the above relation, so that the centrifugal air duct 11 better conforms to the gas flow characteristic, the air duct efficiency is further improved, the air volume is increased, and the noise of the centrifugal fan 100 is reduced. And the opening degree of the centrifugal volute 10 in the direction parallel to the first axis L can be directly calculated by the above relation
Simplifying the design of the centrifugal volute 10.
In some embodiments of the present invention, referring to fig. 4, the contour line of any radial cross section of the centrifugal wind channel 11 includes a third line segment c and a fourth line segment d, the third line segment c and the fourth line segment d are opposite in the direction parallel to the first axis L of the centrifugal volute 10, and the opening degree of the third line segment c and the fourth line segment d of any radial cross section in the direction parallel to the first axis L of the centrifugal volute 10 is larger than that of the fourth line segment d
Satisfies the following conditions:
wherein, the first and the second end of the pipe are connected with each other,
is the angle between any radial section and the initial section of the centrifugal air duct 11, and
is in a radian. k is positive integer and is 1,2, 3, 4, \8230;, wherein k takes the value and the included angle
In connection with, particularly when
When k is 0, when
In this case, k is 1, and so on. p is a pitch of a logarithmic spiral for adjusting the magnitude of the spiral extension of the first side wall 111 and the second side wall 112 in the axial direction of the centrifugal scroll 10, B 0 The opening degree of the third line segment c and the fourth line segment d, which are radial initial cross sections of the centrifugal wind tunnel 11, in the direction parallel to the first axis L of the centrifugal volute 10.
Therefore, the axial opening degree of the centrifugal air duct 11 at different included angle positions can be obtained by using a calculation formula
The height of the centrifugal air duct 11 in the direction parallel to the first axis L of the centrifugal volute 10 is made to better conform to the gas flow characteristic, and the air duct efficiency is further improved.
According to some embodiments of the present invention, as shown in fig. 3, the contour line of any radial cross section of the centrifugal air duct 11 includes a first line segment a and a second line segment b, the first line segment a and the second line segment b are opposite to each other in the radial direction of the centrifugal volute 10, and the opening degree of the first line segment a and the second line segment b in the radial direction of the centrifugal volute 10
Satisfies the following conditions:
wherein, R is the diameter of the wind wheel arranged in the centrifugal volute 10, and the unit is millimeter. m is a coefficient relating to the specific speed of the centrifugal fan 100, that is, m is a coefficient defined by the specific speed n of the centrifugal fan 100 itself s It is decided that,
is the angle between any radial section and the initial section of the centrifugal air duct 11, and
is in the form of a radian. Therefore, the radial opening degree of any radial section can be obtained through calculation, and the design of the centrifugal volute 10 is facilitated.
According to the utility model discloses centrifugal fan 100 of second aspect embodiment, include the wind wheel and according to the utility model discloses the centrifugal spiral case 10 of above-mentioned first aspect embodiment, the wind wheel is located in the centrifugal spiral case 10 for drive air current gets into centrifugal wind channel 11.
According to the utility model discloses centrifugal fan 100, through setting up the centrifugal spiral case 10 of the above-mentioned first aspect embodiment, on the air current flow direction of centrifugal wind channel 11, make at least one in first lateral wall 111 and the second lateral wall 112 keep away from another extension in centrifugal spiral case 10's the direction that is on a parallel with primary axis L gradually, therefore, can make centrifugal wind channel 11 highly increase along the air current flow direction gradually in the axial direction, make centrifugal wind channel 11 accord with gaseous flow characteristic more, thereby further be favorable to improving wind channel efficiency, promote the amount of wind and reduce centrifugal fan 100's noise, and then improved centrifugal fan 100's wholeness ability.
According to some embodiments of the present invention, the centrifugal fan 100 further includes an air guiding ring 20, the air guiding ring 20 is coaxially disposed with the centrifugal volute 10, and the air guiding ring 20 is disposed on at least one end of the centrifugal volute 10 parallel to the direction of the first axis L. That is, the wind-guiding rings 20 may be provided at both ends of the centrifugal scroll 10 in the direction parallel to the first axis L, or the wind-guiding rings 20 may be provided only at one end of the centrifugal scroll 10 in the direction parallel to the first axis L. The air guide ring 20 is used for guiding and guiding the airflow at two axial sides of the centrifugal volute 10 to the position of the wind wheel at the inner side of the centrifugal volute 10, so that the wind wheel can drive the airflow to flow to the centrifugal air duct 11, and then the airflow flows out from the air outlet of the centrifugal air duct 11. In this embodiment, by providing the air guide ring 20, the air flows at two axial sides of the centrifugal fan 100 can more efficiently enter the centrifugal fan 100, and the air intake rate and the air intake efficiency of the centrifugal fan 100 are improved.
Further, an air guide surface is formed on the air guide ring 20, and the air guide surface extends spirally toward the centrifugal rotor along the circumferential direction of the air guide ring 20 in the axial direction of the air guide ring 20. Therefore, the drainage effect of the air guide ring 20 can be further improved, and the air intake is improved. In addition, the air guide surface is arranged to extend spirally along the axial direction of the air guide ring 20, so that the air guide surface is more adaptive to the shapes of the first side wall 111 and the second side edge of the off-line air channel of the centrifugal volute 10, and therefore, the structure can be compact and the occupied space can be reduced.
Because the terminal surface of wind wheel on the axial is the plane, in order to guarantee that the clearance between wind wheel terminal surface and the wind-guiding circle 20 terminal surface is unchangeable, according to some embodiments of the utility model, as shown in fig. 5, in the axial of centrifugal fan 100, the one end terminal surface of wind-guiding circle 20 towards the wind wheel (for example the lower surface of wind-guiding circle 20 that is located centrifugal spiral case 10 upside shown in fig. 5) is the plane of perpendicular to centrifugal fan 100 axis. Therefore, the gap between the wind guide ring 20 and the wind wheel can be kept unchanged, and the wind inlet efficiency is ensured.
According to some embodiments of the present invention, as shown in fig. 5, the wind guiding ring 20 is integrally formed with the centrifugal scroll casing 10. Therefore, the number of parts can be reduced, and the assembly efficiency can be improved.
A centrifugal fan 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 5.
Referring to fig. 5, the centrifugal fan 100 of the present embodiment includes a wind wheel, a centrifugal volute 10, and wind guiding rings 20, the wind wheel is disposed in the centrifugal volute 10, and the wind guiding rings 20 are disposed at two axial ends of the centrifugal volute 10.
Specifically, fig. 1 is a three-dimensional view of a centrifugal volute 10 according to an embodiment of the present invention, and a centrifugal air duct 11 is provided in a centrifugal fan 100. Fig. 3 shows a projection of the centrifugal duct 11 in a projection plane perpendicular to the axis of the centrifugal fan 100, the projection line of the centrifugal duct 11 satisfies an archimedes spiral line, and the radial opening of any radial section of the centrifugal duct 11 in the radial direction of the centrifugal volute 10
The included angle formed from the radial section to the radial initial section of the centrifugal air duct 11
(radians) is directly proportional, i.e.:
wherein m is a coefficient and is determined by the specific rotation speed n of the centrifugal fan 100 s And determining that R is the diameter of the wind wheel.
As shown in fig. 4, the centrifugal duct 11 has a first side wall 111 and a second side wall 112 opposite to each other in a direction parallel to the first axis L, the first side wall 111 is located at an upper side of the second side wall 112, the first side wall 111 extends along a logarithmic spiral gradually rising around the axis of the centrifugal volute 10, the second side wall 112 extends along a logarithmic spiral gradually falling around the axis of the centrifugal volute 10, wherein, for a radial cross section of any position of the centrifugal duct 11, an opening degree between the first side wall 111 and the second side wall 112 in a direction parallel to the first axis L of the centrifugal volute 10 is set
The angle formed from the radial section to the radial starting section of the centrifugal air duct 11
(radians) is directly proportional, i.e.:
wherein the content of the first and second substances,
is a monotonously increasing conversion function and is used for enabling the centrifugal air duct 11 to be in the axial direction of the centrifugal volute 10
Opening degree of the centrifugal air duct 11 in the radial direction of the centrifugal volute 10
In a certain proportional relationship.
According to the designed volute
With following
Is increased linearly, and
should satisfy the spiral equation, it can be derived
The basic expression is as follows:
wherein p is a pitch for adjusting the magnitude of the spiral rising of the first side wall 111 and the second side wall 112 of the centrifugal air duct 11 along the axial direction, B 0 The radial initial section of the centrifugal air duct 11 is the opening degree in the axial direction of the centrifugal volute 10, B 0 Is used for controlling the height of the centrifugal volute 10 in the direction parallel to the first axis L, and the specific value is determined according to actual conditions. k is a coefficient and is an integer.
As shown in fig. 5, the wind-guiding ring 20 may be integrated with the centrifugal scroll casing 10. In the axial direction of the centrifugal volute 10, the air guiding ring 20 extends spirally, and the outlet of the air guiding ring 20 is consistent with the horizontal plane, so as to ensure that the gap between the end surface of the air guiding ring 20 facing one end of the wind wheel and the end surface of the wind wheel is consistent.
The centrifugal fan 100 of the present embodiment can be applied to a refrigeration device. The centrifugal fan 100 of the present embodiment only improves the profile of the centrifugal air duct 11, and the installation manner of the centrifugal fan 100 is consistent with that of the centrifugal fan 100 in the prior art, and the structural assembly is not affected.
The volute in the background art and the (double-spiral) centrifugal volute 10 of the embodiment are simulated and simulated by Ansys FLUENT, and the air volume, noise and power difference of the volute and the wind wheel at the same rotating speed are compared, and the result is as follows:
the air volume ratio is obtained by monitoring the air volume value of the outlet as shown in fig. 6: the air volume of the centrifugal volute 10 of the present embodiment is 23.3m/min, while the air volume of the volute in the background art is 22.2m/min, and it can be known by comparison that the air volume of the centrifugal volute 10 of the present embodiment is increased by 4.9%.
For example, as shown in fig. 7 and 8, fig. 7 is a cloud graph of broadband noise distribution on the surface of the volute in the background art, and fig. 8 is a cloud graph of broadband noise distribution on the surface of the twin-spiral centrifugal volute 10 in this embodiment, it can be seen by comparison that the noise value of the twin-spiral centrifugal volute 10 in this embodiment is slightly lower than that of the volute in the background art by 0.1dB.
Comparing the power ratio of the double spiral centrifugal volute 10 of the present embodiment with that of the volute of the background art, as shown in fig. 9, it can be seen that the power of the centrifugal volute 10 of the present embodiment is lower by 6W at the same rotation speed.
According to the centrifugal fan 100 provided by the embodiment of the utility model, innovation is made on the design method of the traditional centrifugal air duct 11 volute, the Archimedes spiral design is adopted on the longitudinal section while the Archimedes spiral of the transverse section is kept, and the air flow characteristic is fully followed, so that the air duct efficiency can be improved; the air quantity is increased and the static pressure is increased; improve the gas flow state and reduce the noise.
According to the third aspect of the present invention, the refrigeration device includes the centrifugal fan 100 according to the second aspect of the present invention.
According to the utility model discloses refrigeration plant through setting up the centrifugal fan 100 of the above-mentioned first aspect embodiment to improve and refrigeration plant's wholeness ability.
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", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of 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, 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 to implicitly indicate the number of technical features indicated. Thus, 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, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means 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 present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
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 (11)
1. A centrifugal volute is characterized in that a centrifugal air duct is arranged in the centrifugal volute, the centrifugal air duct extends spirally in a plane perpendicular to a first axis of the centrifugal volute, and the first axis is coincident with a central axis of a centrifugal wind wheel arranged in the centrifugal volute;
the centrifugal air duct has a first side wall and a second side wall opposite in a direction parallel to the first axis, the first side wall extending gradually away from the second side wall in a direction along the first axis and/or the second side wall extending gradually away from the first side wall in a direction along the first axis in a direction along the gas flow direction within the centrifugal air duct.
2. The centrifugal volute of claim 1, wherein the centrifugal duct extends along an archimedes spiral in a plane perpendicular to the first axis.
3. The centrifugal volute of claim 2, wherein the first sidewall and the second sidewall each extend along a logarithmic spiral in a direction parallel to the first axis.
4. The centrifugal volute of claim 3, wherein the contour of any radial cross-section of the centrifugal air duct includes a first line segment, a second line segment, a third line segment, and a fourth line segment, the first line segment being radially opposite the second line segment, the third line segment and the fourth line segment being radially opposite the centrifugal voluteThe fourth line segment is opposite to the first axis, and the opening degree of the third line segment and the fourth line segment of any radial cross section in the direction parallel to the first axis
Satisfies the following conditions:
wherein the content of the first and second substances,
the included angle between any radial section and the radial initial section of the centrifugal air duct is set;
the opening degree of the first line segment and the second line segment in the radial direction of the centrifugal volute,
is a monotonically increasing function.
5. The centrifugal volute of claim 4, wherein the monotonically increasing function
Satisfies the following conditions:
wherein k is coefficient and k =0,1,2, \8230; p is the pitch of the logarithmic spiral; b 0 Opening degrees of a third line segment and a fourth line segment of the initial section are set; r is the diameter of the wind wheel arranged in the centrifugal volute(ii) a m is a coefficient related to the specific speed of the centrifugal fan.
6. The centrifugal volute of claim 2, wherein the contour of any radial cross-section of the centrifugal air duct includes a first line segment and a second line segment, the first line segment and the second line segment being opposite in a radial direction of the centrifugal volute, and the opening degree of the first line segment and the second line segment in the radial direction of the centrifugal volute
Satisfies the following conditions:
。
7. a centrifugal fan comprising a centrifugal rotor and a centrifugal volute according to any of claims 1-6, said centrifugal rotor being disposed within said centrifugal volute.
8. The centrifugal fan according to claim 7, further comprising an air guide ring coaxially disposed with the centrifugal volute, wherein the air guide ring is disposed at least one end of the centrifugal volute in a direction parallel to the first axis, an air guide surface is formed on the air guide ring, and the air guide surface extends spirally toward the centrifugal wind wheel along a circumferential direction of the air guide ring in an axial direction of the air guide ring.
9. The centrifugal fan according to claim 8, wherein an end surface of the air guide ring facing the centrifugal wind wheel in an axial direction of the centrifugal fan is a plane perpendicular to an axis of the centrifugal fan.
10. The centrifugal fan of claim 8 wherein the wind-directing ring is integrally formed with the centrifugal volute.
11. A refrigerating device characterized in that it comprises a centrifugal fan according to any one of claims 7-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221948571.4U CN218509790U (en) | 2022-07-26 | 2022-07-26 | Centrifugal volute, centrifugal fan and refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221948571.4U CN218509790U (en) | 2022-07-26 | 2022-07-26 | Centrifugal volute, centrifugal fan and refrigeration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218509790U true CN218509790U (en) | 2023-02-21 |
Family
ID=85206508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221948571.4U Active CN218509790U (en) | 2022-07-26 | 2022-07-26 | Centrifugal volute, centrifugal fan and refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218509790U (en) |
-
2022
- 2022-07-26 CN CN202221948571.4U patent/CN218509790U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20160003256A1 (en) | Fan, molding die, and fluid feeder | |
| CN116538113A (en) | Outdoor unit of air conditioner | |
| CN103277324B (en) | There is the centrifugal compressor of asymmetric vaneless diffuser and there is its automobile | |
| WO2022218009A1 (en) | Air-conditioning device and automobile | |
| CN109307319A (en) | Air conditioner indoor unit and air conditioner | |
| CN114352573B (en) | Compact centrifugal fan | |
| CN218509790U (en) | Centrifugal volute, centrifugal fan and refrigeration equipment | |
| CN114233661A (en) | Air guide sleeve air ring, axial flow fan and air conditioning unit | |
| CN213808156U (en) | Fan device and air condensing units | |
| CN208804046U (en) | Centrifugal blower and range hood | |
| CN215762421U (en) | Centrifugal fan blade, fan and air conditioning system comprising same | |
| CN213808153U (en) | Fan device and air condensing units | |
| CN212431131U (en) | Centrifugal fan and window air conditioner with same | |
| CN112128120B (en) | Ultra-thin indoor unit | |
| CN115727008A (en) | Air inlet ring and range hood | |
| CN215171030U (en) | High-load three-dimensional flow movable impeller and motor thereof | |
| CN213808155U (en) | Fan device and air condensing units | |
| CN113550930A (en) | Centrifugal fan blade, fan and air conditioning system comprising same | |
| CN110425157B (en) | Efficient gas mixing centrifugal fan | |
| CN219711861U (en) | Backward centrifugal wind wheel and centrifugal fan | |
| CN219413024U (en) | Centrifugal fan and range hood | |
| CN219472372U (en) | Fan, fresh air system and air conditioner | |
| CN214247797U (en) | Centrifugal fan and air conditioner | |
| CN220505392U (en) | Impeller of centrifugal fan, centrifugal fan and range hood | |
| CN221053985U (en) | Cabinet air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |