CN216306329U - Cross-flow fan, indoor unit and air conditioner - Google Patents
Cross-flow fan, indoor unit and air conditioner Download PDFInfo
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- CN216306329U CN216306329U CN202122964481.6U CN202122964481U CN216306329U CN 216306329 U CN216306329 U CN 216306329U CN 202122964481 U CN202122964481 U CN 202122964481U CN 216306329 U CN216306329 U CN 216306329U
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Abstract
The embodiment provides a cross-flow fan, an indoor unit and an air conditioner, and belongs to the technical field of air conditioners. The cross-flow fan comprises a cross-flow fan, a front volute and a rear volute. The front volute and the rear volute are arranged oppositely, an air outlet is formed on one side, and an air inlet is formed on the other side. The cross flow fan is rotatably arranged between the front volute and the rear volute. The side of the front volute close to the air inlet is provided with a front volute tongue, and the side of the rear volute close to the air inlet is provided with a rear volute tongue. An included angle is formed between the shortest connecting line of the front volute tongue and the rear volute tongue and the arrangement direction of the air outlet, wherein the shortest connecting line passes through the center of the through-flow fan, the included angle is A, and A is more than 25 degrees and less than 35 degrees. The air outlet quantity of the cross flow fan is improved by adjusting the positions of the front volute tongue and the rear volute tongue.
Description
Technical Field
The utility model relates to the technical field of air conditioners, in particular to a cross-flow fan, an indoor unit and an air conditioner.
Background
The cross-flow fan is also called cross-flow fan, has the characteristics of high outlet dynamic pressure, long blowing distance, flat and uniform airflow, slender and small structure, low noise and the like, and is widely applied to the fields of air purification, dust removal and ventilation, automobiles, air conditioners and a plurality of household appliances.
The cross-flow fan mainly comprises an impeller, an air duct and a motor. The impeller is multi-blade type and long cylindrical, and is provided with forward multi-wing blades. When the impeller rotates, airflow enters the blade grids from the opening position of the impeller, passes through the inside of the impeller and is discharged into the volute from the blade grids on the other side to form working airflow.
The air duct structure of the conventional cross-flow fan is unreasonable in arrangement, so that the air output of the cross-flow fan is small.
SUMMERY OF THE UTILITY MODEL
The utility model solves the problem that the air duct structure of the conventional cross-flow fan is unreasonable in arrangement, so that the air output of the cross-flow fan is small.
In order to solve the problems, the embodiment of the utility model provides a cross-flow fan, an indoor unit and an air conditioner. The problem that the air duct of the cross-flow fan is unreasonable in arrangement can be solved, and the air output of the cross-flow fan is improved.
In a first aspect, the present invention provides a crossflow blower comprising a crossflow fan, a front volute and a rear volute; the front volute and the rear volute are oppositely arranged, an air outlet is formed on one side, and an air inlet is formed on the other side; the cross flow fan is rotatably arranged between the front volute and the rear volute; a front volute tongue is arranged on one side, close to the air inlet, of the front volute, and a rear volute tongue is arranged on one side, close to the air inlet, of the rear volute; an included angle is formed between the shortest connecting line of the front volute tongue and the rear volute tongue and the arrangement direction of the air outlet, wherein the shortest connecting line passes through the center of the through-flow fan, and the included angle is A, and A is more than 25 degrees and less than 35 degrees.
According to the cross flow fan, the positions of the front volute tongue and the rear volute tongue are adjusted, the included angle A is formed between the shortest connecting line of the centers of the front volute tongue and the rear volute tongue and the setting direction of the air outlet, the included angle A is enabled to be more than 25 degrees and less than 35 degrees, and the air output of the cross flow fan is improved.
In an alternative embodiment, 28 ° < A < 32 °. When the included angle A meets the condition that A is more than 28 degrees and less than 32 degrees, the air output of the cross flow fan can be larger.
In an optional embodiment, the rear volute further comprises a straight line segment and a circular arc segment, the straight line segment and the rear volute tongue are respectively connected with two ends of the circular arc segment, and the straight line segment extends towards a direction close to the front volute; the front volute comprises a diffusion section which is connected with the front volute tongue in an angle mode, the front volute tongue and the through-flow fan are arranged oppositely, the diffusion section and the straight line section are arranged oppositely, and the air outlet is formed between one end, far away from the front volute tongue, of the diffusion section and one end, far away from the circular arc section, of the straight line section.
The rear volute is formed by sequentially connecting a straight line section, an arc section and a rear volute tongue, and the diffusion degree of fluid in the flow channel can be controlled, so that the flow channel is more favorable for the flow of the fluid. The front volute is formed by connecting an angular diffusion section and a front volute tongue, so that a flow field is smoother, and the air quantity is improved.
In an optional embodiment, one end of the rear volute tongue, which is far away from the circular arc section, extends towards a direction far away from the cross-flow fan, and a connecting line between the end part of the rear volute tongue, which is close to the circular arc section, and the end part of the front volute tongue, which is far away from the diffuser section, is the shortest connecting line. The end of the rear volute tongue far away from the arc section extends towards the direction far away from the cross flow fan, so that the flow of the air inlet can be improved. The section of the rear volute tongue close to the arc section and the end part of the front volute tongue far away from the diffusion section form the shortest connecting line, so that the inner side of the cross-flow fan, which is closer to the cross-flow fan, and the front volute casing are enabled, the backflow at the front volute tongue is obviously reduced, the air quantity is improved, and the flow field is smoother.
In an optional implementation manner, an included angle is formed between the straight line segment and the arrangement direction of the air outlet, the included angle is B, and B is more than 20 degrees and less than 30 degrees.
The included angle between the straight line segment and the air outlet is set to be more than 20 degrees and less than 30 degrees, and the diffusion degree of the fluid in the flow channel can be controlled, so that the flow channel is more favorable for the flow of the fluid.
In an alternative embodiment, 22.5 ° < B < 27.5 °.
In an alternative embodiment, the length of the straight line segment is L1, the diffuser section is linear, and the length of the diffuser section is L2, 2.2 < L1, L2 < 2.8.
According to the air-out path control method and the air-out path control device, the proportion of the length L1 of the straight line section to the length L2 of the diffuser section is set to be 2.2 < L1, and the proportion of the length L2 < 2.8 of the diffuser section is optimized, so that the diffuser degree of fluid in a flow channel can be better controlled, and the air-out path is more favorable for the flow of the fluid.
In an alternative embodiment, 2.4 < L1: L2 < 2.6.
In a second aspect, the present invention provides an indoor unit comprising a crossflow blower as described in any one of the preceding embodiments.
According to the air outlet control method and the air outlet control device, the positions of the front volute tongue and the rear volute tongue are adjusted, the included angle A is formed between the shortest connecting line of the front volute tongue and the rear volute tongue passing through the center of the cross-flow fan and the air outlet setting direction, and the included angle A is enabled to meet the conditions that A is more than 25 degrees and less than 35 degrees, so that the arrangement positions of the front volute and the rear casing are changed, and the air outlet quantity of the indoor unit is increased.
In a third aspect, the present invention provides an air conditioner including the indoor unit according to the foregoing embodiment.
According to the air conditioner, the positions of the front volute tongue and the rear volute tongue are adjusted, the front volute tongue and the rear volute tongue are arranged between the shortest connecting line of the centers of the through-flow fans and the air outlet arrangement direction to form an included angle A, the included angle A is enabled to meet the conditions that A is more than 25 degrees and less than 35 degrees, the arrangement positions of the front volute and the rear casing are changed, and the air output of the air conditioner is improved.
Drawings
Fig. 1 is a schematic structural diagram of an indoor unit according to an embodiment of the present invention;
FIG. 2 is a graph comparing the air flow before and after modification of a crossflow blower provided by an embodiment of the present invention.
Icon: 100-cross flow fan; 110-cross flow fan; 111-an air outlet; 113-an air inlet; 130-front volute; 131-front volute tongue; 133-a diffuser section; 150-rear volute; 151-posterior volute tongue; 153-straight line segment; 155-arc segment; 200-indoor unit; 210-a back panel; 230-an evaporator; 250-a panel; 251-an air outlet channel; 253-air deflectors; 260-a containing space.
Detailed Description
The air duct structure of the conventional cross-flow fan 100 is unreasonable in arrangement, so that the air output of the cross-flow fan 100 is small.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, an embodiment of the present invention provides an air conditioner. The air conditioner includes an indoor unit 200 and an outdoor unit (not shown). The indoor unit 200 and the outdoor unit are connected by a pipe (not shown).
In the present embodiment, the indoor unit 200 includes a back panel 210, an evaporator 230, a cross-flow fan 100, and a panel 250. The back panel 210 and the panel 250 enclose a receiving space 260, and the crossflow blower 100 and the evaporator 230 are disposed in the receiving space 260. The intake 113 of the crossflow blower 100 is disposed opposite the evaporator 230. The panel 250 is provided with an air outlet channel 251 communicated with the air outlet 111 of the cross flow fan 100. An air deflector 253 is rotatably disposed in the air outlet channel 251.
In the present embodiment, the crossflow blower 100 includes a crossflow fan 110, a front volute 130, and a rear volute 150. The front volute 130 is disposed opposite to the rear volute 150, and has an air outlet 111 formed at one side and an air inlet 113 formed at the other side. The cross flow fan 110 is rotatably disposed between the front and rear volutes 130 and 150. A front volute tongue 131 is arranged on one side of the front volute 130 close to the air inlet 113, and a rear volute tongue 151 is arranged on one side of the rear volute 150 close to the air inlet 113. An included angle is formed between the shortest connecting line of the front volute tongue 131 and the rear volute tongue 151 and the arrangement direction of the air outlet 111, wherein the shortest connecting line passes through the center of the through-flow fan 110, the included angle is A, and A is more than 25 degrees and less than 35 degrees.
According to the cross flow fan 100, the included angle A is formed between the shortest connecting line of the front volute tongue 131 and the rear volute tongue 151 passing through the center of the cross flow fan 110 and the arrangement direction of the air outlet 111, and the included angle A is enabled to meet the condition that A is more than 25 degrees and less than 35 degrees, so that the arrangement positions of the front volute 130 and the rear casing are changed, and the air output of the cross flow fan 100 is improved.
It should be noted that the installation direction of the outlet 111 is in the front-rear direction of the indoor unit 200, after the indoor unit 200 is installed, the direction corresponding to the outlet channel 251 on the panel 250 is front, the direction corresponding to the back panel 210 is rear, and the installation direction of the outlet 111 may also be a direction perpendicular to the plane of the outlet 111. The center of the cross flow fan 110 refers to a rotation center of the cross flow fan 110. The shortest connecting line refers to the connecting line of the front volute tongue 131 and the rear volute tongue 151 which is most broken through the center of the cross flow fan 110, and the shortest connecting line is determined by rotating along the center of the cross flow fan 110.
In the present embodiment, the angle A satisfies 28 DEG < A < 32 deg. The air output of the cross flow fan 100 and the included angle A are normally distributed, and the air output of the cross flow fan 100 can be larger when the included angle A meets the condition that A is more than 28 degrees and less than 32 degrees. Further, optionally, a is 32 °.
In other embodiments of the present application, two end points of the range of values of a may also be any two integer values of 25 °, 26 °, 27 °, 28 °, 29 °, 30 °, 31 °, 32 °, 33 °, 34 °, and 35 °, for example, a satisfies 28 ° < a < 35 °, 27 ° < a < 32 °, and so on. The value range of A can be any sub-interval of 25 degrees < A < 35 degrees, and the end point values are not limited to integers, such as 25.5 degrees < A < 34.5 degrees, 30.5 degrees < A < 34.5 degrees and the like. It is understood that the range of values of A is within the scope of the present application as long as A is in the range of 25 < A < 35.
In this embodiment, the rear volute 150 further includes a straight line segment 153 and a circular arc segment 155, the straight line segment 153 and the rear volute tongue 151 are respectively connected to two ends of the circular arc segment 155, and the straight line segment 153 extends toward a direction close to the front volute 130. The front volute 130 comprises a diffusion section 133 connected with the front volute tongue 131 at an angle, the front volute tongue 131 is arranged opposite to the through-flow fan 110, the diffusion section 133 is arranged opposite to the straight line section 153, and an air outlet 111 is formed between one end, far away from the front volute tongue 131, of the diffusion section 133 and one end, far away from the circular arc section 155, of the straight line section 153. The rear volute 150 is formed by sequentially connecting a straight line segment 153, an arc segment 155 and a rear volute tongue 151, and can control the diffusion degree of fluid in a flow channel, so that the flow channel is more favorable for the flow of the fluid. The front volute 130 is formed by connecting an angular diffuser 133 and a front volute tongue 131, so that a flow field is smoother, and the effect of increasing the air volume is achieved.
In this embodiment, one end of the rear volute tongue 151 away from the circular arc section 155 extends in a direction away from the cross flow fan 110, and a connection line between an end of the rear volute tongue 151 close to the circular arc section 155 and an end of the front volute tongue 131 away from the diffuser section 133 is the shortest connection line.
In this embodiment, the arc segment 155 is involute, and the distance between the segment connected to the rear volute tongue 151 and the edge of the cross flow fan 110 increases from one end of the rear volute tongue 151 to the segment connected to the straight line segment 153, so that the flow channel enclosed by the cross flow fan 110 and the arc segment 155 gradually widens to facilitate air outlet, and the narrowest position of the flow channel is formed at the connection between the arc segment 155 and the rear volute tongue 151, thereby preventing fluid in the flow channel from leaking outside. The change of the included angle a can be realized by the position of the integral rear volute 150, or by the change of the air duct structure such as shortening the length of the arc section 155 or increasing the length of the rear volute tongue 151, so as to change the included angle a between the shortest connecting line and the direction of the air outlet 111.
In this embodiment, the straight line segment 153 forms an included angle with the installation direction of the air outlet 111, the included angle is B, and the included angle is greater than 20 degrees and less than 30 degrees. Further, optionally, 22.5 ° < B < 27.5 °. The included angle between the straight line segment 153 and the air outlet 111 is set to be more than 20 degrees and less than 30 degrees, so that the diffusion degree of fluid in the flow channel can be controlled, and the flow channel is more favorable for the flow of the fluid.
In this embodiment, an included angle B between the straight line segment 153 and the installation direction of the air outlet 111 is 25 °. The included angle B is set to 25 degrees, so that the air quantity of the air outlet 111 can be improved, and the air quantity of the air outlet 111 is larger.
In other embodiments of the present application, two end points of the range of B may also take any two integer values of 21 °, 22 °, 23, 24 °, 25 °, 26 °, 27 °, 28 °, 29 ° and 30 °, for example 22 ° < B < 27 °, 25 ° < B < 29 °. Of course, B is not limited to an integer, and can also be, for example, 22.5 degrees < B < 27.5 degrees, 20.5 degrees < B < 29.5 degrees, etc. It is understood that the protection scope of the present application is provided as long as A is in the range of 20 DEG < B < 30 deg.
In the present embodiment, the length of the straight line segment 153 is L1, and the diffuser segment 133 is linear. The length of the diffuser 133 is L2, 2.2 < L1, L2 < 2.8. The ratio of the length L1 of the straight line segment 153 to the length L2 of the diffuser 133 was set to 2.2 < L1: L2 < 2.8. The diffusion degree of the fluid in the flow channel can be better controlled, the backflow is improved, and the flowing of the fluid is more facilitated. Further, optionally, the ratio of the length L1 of straight section 153 to the length L2 of diffuser 133 is 2.4 < L1, and L2 < 2.6.
In this example, L1: L2 is 2.5. The arrangement can better control the diffusion degree of the fluid in the flow channel and improve the backflow, thereby being more beneficial to the flow of the fluid.
In other embodiments of the present application, the values at the two ends of the ratio range between the length L1 of the straight line segment 153 and the length L2 of the diffuser segment 133 may also be in the interval of any two values of 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, and 2.8. For example 2.3 < L1, L2 < 2.5, 2.5 < L1, L2 < 2.5. It is understood that the ratio of the length L1 of straight section 153 to the length L2 of diffuser 133 in the interval 2.2 < L1: L2 < 2.8 is within the scope of the present application.
FIG. 2 shows a comparison of air output for a crossflow blower 100 before modification and a crossflow blower 100 after modification of the present application. The abscissa indicates the rotational speed of the cross flow fan 110, and the ordinate indicates the air output of the cross flow fan 100. As can be seen from FIG. 2, the air output of the cross-flow fan 100 after the improvement of the present application is significantly better than the air output of the cross-flow fan 100 before the improvement, especially the effect is more obvious when the rotation speed of the cross-flow fan 110 is higher.
The working principle and the beneficial effects of the cross flow fan 100, the indoor unit 200 and the air conditioner provided by the embodiment comprise that:
according to the cross flow fan 100, the included angle A is formed between the shortest connecting line of the front volute tongue 131 and the rear volute tongue 151 passing through the center of the cross flow fan 110 and the arrangement direction of the air outlet 111, and the included angle A is enabled to meet the condition that A is more than 25 degrees and less than 35 degrees, so that the arrangement positions of the front volute 130 and the rear casing are changed, and the air output of the cross flow fan 100 is improved.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. A crossflow blower comprising a crossflow fan (110), a front volute (130) and a rear volute (150);
the front volute (130) and the rear volute (150) are arranged oppositely, an air outlet (111) is formed on one side, and an air inlet (113) is formed on the other side;
the cross flow fan (110) is rotatably arranged between the front volute (130) and the rear volute (150); a front volute tongue (131) is arranged on one side, close to the air inlet (113), of the front volute (130), and a rear volute tongue (151) is arranged on one side, close to the air inlet (113), of the rear volute (150);
an included angle is formed between the shortest connecting line of the front volute tongue (131) and the rear volute tongue (151) and the arrangement direction of the air outlet (111), wherein the shortest connecting line passes through the center of the cross flow fan (110), and the included angle is A, and A is more than 25 degrees and less than 35 degrees.
2. The crossflow blower of claim 1 in which 28 ° < a < 32 °.
3. The crossflow blower of claim 1 or 2 wherein the rear volute (150) further comprises a straight line segment (153) and a circular arc segment (155), the straight line segment (153) and the rear volute tongue (151) are respectively connected with two ends of the circular arc segment (155), and the straight line segment (153) extends towards a direction close to the front volute (130);
the front volute (130) comprises a diffusion section (133) connected with a front volute tongue (131) in an angle mode, the front volute tongue (131) is arranged opposite to the through-flow fan, the diffusion section (133) is arranged opposite to the straight line section (153), and the air outlet (111) is formed between one end, away from the front volute tongue (131), of the diffusion section (133) and one end, away from the circular arc section (155), of the straight line section (153).
4. The crossflow blower of claim 3, wherein one end of the rear volute tongue (151) far away from the circular arc segment (155) extends towards the direction far away from the crossflow fan (110), and the shortest connecting line is the connecting line between the end part of the rear volute tongue (151) close to the circular arc segment (155) and the end part of the front volute tongue (131) far away from the diffuser segment (133).
5. The crossflow blower of claim 3, wherein the straight line segment (153) forms an included angle with the arrangement direction of the air outlet (111), the included angle is B, and 20 ° < B < 30 °.
6. The crossflow blower of claim 5 in which 22.5 ° < B < 27.5 °.
7. The crossflow blower of claim 3 wherein the straight section (153) has a length of L1, the diffuser section (133) is linear, and the diffuser section (133) has a length of L2, 2.2 < L1: L2 < 2.8.
8. The crossflow blower of claim 7 in which 2.4 < L1: L2 < 2.6.
9. An indoor unit, characterized by comprising a crossflow blower (100) as claimed in any one of claims 1 to 8.
10. An air conditioner characterized by comprising the indoor unit (200) of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122964481.6U CN216306329U (en) | 2021-11-26 | 2021-11-26 | Cross-flow fan, indoor unit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122964481.6U CN216306329U (en) | 2021-11-26 | 2021-11-26 | Cross-flow fan, indoor unit and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216306329U true CN216306329U (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122964481.6U Active CN216306329U (en) | 2021-11-26 | 2021-11-26 | Cross-flow fan, indoor unit and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216306329U (en) |
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2021
- 2021-11-26 CN CN202122964481.6U patent/CN216306329U/en active Active
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