CN108916116B - Volute tongue, volute tongue control method, cross-flow fan and air conditioner - Google Patents
Volute tongue, volute tongue control method, cross-flow fan and air conditioner Download PDFInfo
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- CN108916116B CN108916116B CN201810668479.4A CN201810668479A CN108916116B CN 108916116 B CN108916116 B CN 108916116B CN 201810668479 A CN201810668479 A CN 201810668479A CN 108916116 B CN108916116 B CN 108916116B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 239000000178 monomer Substances 0.000 claims description 29
- 230000001502 supplementing effect Effects 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 19
- 230000033001 locomotion Effects 0.000 claims description 9
- 230000002238 attenuated effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a volute tongue, a volute tongue control method, a cross-flow fan and an air conditioner. The volute tongue comprises a volute tongue body, and the volute tongue body is provided with a drainage wall, a tongue inner flow surface and a drainage channel, wherein the drainage channel extends from the drainage wall to the tongue inner flow surface so as to guide an airflow part at the drainage wall to the tongue inner flow surface, and the volute tongue further comprises a channel opening and closing mechanism, wherein the channel opening and closing mechanism is used for controlling the opening or closing of the drainage channel. According to the volute tongue, the volute tongue control method, the cross-flow fan and the air conditioner, which are disclosed by the invention, the volute tongue is particularly suitable for machine types with different rotating speeds, and the drainage channel of the volute tongue can be selectively opened or closed, so that the volute tongue has a wider impeller rotating speed application range, the noise of the cross-flow fan is effectively reduced, and the performance attenuation of the fan is prevented.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to a volute tongue, a volute tongue control method, a cross-flow fan and an air conditioner.
Background
In the past, volute tongue noise is an important problem affecting the noise of a cross flow fan, and a single drainage channel or multiple drainage channels can be utilized to regulate the tongue airflow, but for different models, the rotating speed change range is wider, the air flow (drainage or air supplementing effect) of each drainage channel is different due to different distances between the drainage channels and an impeller, even the difference is quite large, specifically, the air supplementing amount of the drainage channel which is closer to the impeller is the largest, the air supplementing amount corresponding to the drainage channel is gradually attenuated along with the increase of the distance between the drainage channels and the impeller, and the effect of noise elimination is optimal and the attenuation on the performance of the fan is smaller under the condition of different rotating speeds of the cross flow fan is guaranteed.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide the volute tongue, the volute tongue control method, the cross-flow fan and the air conditioner, which are particularly suitable for machine types with different rotating speeds, and can selectively open or close the drainage channel of the volute tongue, so that the volute tongue has a wider impeller rotating speed application range, the noise of the cross-flow fan is effectively reduced, and the performance attenuation of the fan is prevented.
In order to solve the above problems, the present invention provides a volute tongue, which comprises a volute tongue body, a channel opening and closing mechanism and a channel opening and closing mechanism, wherein the volute tongue body is provided with a drainage wall, a tongue inner flow surface and a drainage channel, the drainage channel extends from the drainage wall to the tongue inner flow surface so as to guide an airflow part at the drainage wall to the tongue inner flow surface, and the channel opening and closing mechanism is used for controlling the opening or closing of the drainage channel.
Preferably, a plane perpendicular to the axis of the impeller is a first plane, the flow surfaces in the drainage wall and the tongue are connected through an airflow diversion surface, the projection of the airflow diversion surface on the first plane forms a first arc, a first line segment is arranged at the center of the first arc, the first line segment is perpendicular to the drainage wall, the projection of the drainage wall on the first plane forms a second line segment, the first line segment and the second line segment intersect at a first point, the drainage wall has a first length L from the first point along the air outlet direction, the drainage wall within a range of 0-60% L from the first point is a first section, the drainage wall is provided with an inlet of the drainage channel, and the inlet is arranged on the first section.
Preferably, the first section comprises a second section, the drainage wall in the range of 0-40% L from the first point is the second section, and the inlet is arranged on the second section.
Preferably, the drainage channel is an arc-shaped channel.
Preferably, the flow-guiding channel has a first tangent at the inlet, which forms an air flow deflection angle A with the flow-guiding wall on the side close to the impeller, 0 DEG < A < 90 deg.
Preferably 0 DEG < A < 50 deg.
Preferably, the number of the drainage channels is at least three, and the at least three drainage channels are staggered on the drainage wall along the axial direction of the impeller.
Preferably, the number of the drainage channels is at least three, and the at least three drainage channels are staggered on the drainage wall along the air outlet direction.
Preferably, the number of the drainage channels is k, k is less than or equal to 3, and the k drainage channels are sequentially arranged along the radial direction of the impeller.
Preferably, 3.ltoreq.k.ltoreq.5.
Preferably, the volute tongue body comprises k+1 tongue body monomers, namely a first monomer, a second monomer, … and a k+1 monomer, wherein the first monomer, the second monomer, … and the k+1 monomer are sequentially arranged in the radial direction of the impeller, one drainage channel is formed between two adjacent tongue body monomers, k+1 drainage channels are formed among the tongue body monomers, the first channel, the second channel, … and the k channel are respectively arranged in the radial direction of the impeller, the first channel, the second channel, … and the k channel are sequentially arranged in the radial direction of the impeller, the channel opening and closing mechanism is k groups, each group of channel opening and closing mechanism is respectively used for controlling the opening or closing of each drainage channel, and the k groups of channel opening and closing mechanisms are respectively used for correspondingly controlling the opening or closing of the k drainage channels.
Preferably, the channel opening and closing mechanism comprises a transmission rod and a driving part, and the driving part drives the tongue body monomer to reciprocate in the direction She Lunjing through the transmission rod so as to realize the opening or closing of the drainage channel.
Preferably, the transmission rod is provided with a threaded hole, the driving part comprises a motor, the output end of the motor is in threaded connection with the threaded hole, and when the motor runs, the motor is converted into reciprocating motion of the tongue body unit through circumferential motion of threaded engagement of the output end and the transmission rod.
Preferably, one side of the volute tongue body is provided with an anti-falling chute, and the volute tongue body further comprises a guide plate, wherein the guide plate is provided with a sliding convex strip, and the sliding convex strip is in matched sliding connection with the anti-falling chute.
Preferably, the channel opening and closing mechanism comprises an electric control one-way valve, and the electric control one-way valve is arranged in the drainage channel.
Preferably, the electric control one-way valve is arranged at the air inlet end of the drainage channel.
The invention also provides a cross-flow fan, which comprises the volute tongue.
The invention also provides an air conditioner comprising the cross-flow fan.
The invention also provides a volute tongue control method for controlling the volute tongue, which is characterized by comprising the following steps:
a. selecting a supplementary gear i, wherein i=1, 2, 3, …, k;
b. and controlling the drainage channel matched with the air supplementing gear i to be opened or closed.
Preferably, when the channel opening and closing mechanism comprises a transmission rod and a driving part, the driving part is controlled to operate, so that the driving part drives the tongue body monomer to reciprocate in the radial direction of the impeller through the transmission rod, and the drainage channel is opened or closed.
Preferably, when the channel opening and closing mechanism comprises the electric control check valves, each electric control check valve is controlled to conduct or close the drainage channel.
Preferably, when k=5, acquiring a gas supplementing gear i, wherein i is equal to any one of 1, 2, 3, 4 and 5, and when i=5, the gear is a fifth gear, and controlling all five drainage channels to be opened; when i=4, the gear is a fourth gear, any four of the five drainage channels are controlled to be opened, and the rest one drainage channel is controlled to be closed; when i=3, the device is in third gear, any three of the five drainage channels are controlled to be opened, and the remaining two drainage channels are controlled to be closed; when i=2, the device is in a second gear, any two of the five drainage channels are controlled to be opened, and the remaining three drainage channels are controlled to be closed; when i=1, the first gear is used for controlling any one of the five drainage channels to be opened, and the remaining four drainage channels are controlled to be closed.
Preferably, when k=4, acquiring a gas supplementing gear i, wherein i is equal to any one of 1, 2, 3 and 4, and when i=4, the gas supplementing gear is a fourth gear, and controlling all four drainage channels to be opened; when i=3, the device is in third gear, any three of the four drainage channels are controlled to be opened, and the rest one drainage channel is controlled to be closed; when i=2, the device is in a second gear, any two of the four drainage channels are controlled to be opened, and the remaining two drainage channels are controlled to be closed; when i=1, the first gear is used for controlling any one of the four drainage channels to be opened, and the remaining three drainage channels are controlled to be closed.
Preferably, when k=3, acquiring a gas supplementing gear i, wherein i is equal to any one of 1, 2 and 3, and when i=3, the gas supplementing gear is a third gear, and controlling all three drainage channels to be opened; when i=2, the device is in a second gear, any two of the three drainage channels are controlled to be opened, and the rest one drainage channel is controlled to be closed; when i=1, the first gear is used for controlling any one of the three drainage channels to be opened.
According to the volute tongue, the volute tongue control method, the through-flow fan and the air conditioner, the channel opening and closing mechanism is arranged, so that air flow generated by rotation of the impeller can be selectively guided to the tongue inner flow surface from the drainage wall at the inlet of the drainage channel, and finally the circumferential rotation speed of the impeller is reduced at the small tongue interval between the impeller and the tongue inner flow surface, so that noise of the through-flow fan and the air conditioner applying the same is reduced.
Drawings
FIG. 1 is a schematic view of a volute tongue according to an embodiment of the present invention;
FIG. 2 is a schematic view of a volute tongue according to another embodiment of the invention;
FIG. 3 is a schematic view of a portion of the drainage wall of the volute tongue along the direction B of FIG. 2 according to an embodiment of the present invention;
FIG. 4 is a schematic view showing a partial structure of a drainage wall of a volute tongue according to still another embodiment of the present invention along the direction B in FIG. 2;
FIG. 5 is a schematic view showing a partial structure of a drainage wall of a volute tongue according to still another embodiment of the present invention along the direction B in FIG. 2;
fig. 6 is a schematic view showing a partial structure of a drainage wall of a volute tongue according to still another embodiment of the present invention along the direction B in fig. 2.
The reference numerals are expressed as:
1. a volute tongue body; 11. a drainage wall; 12. a tongue inner flow surface; 13. a drainage channel; 131. an inlet; 14. tongue body single body; 17. an airflow diversion surface; 2. an impeller; 3. a transmission rod; 4. the tongue is closely spaced.
Detailed Description
Referring to fig. 1 to 6 in combination, according to an embodiment of the present invention, there is provided a volute tongue including a volute tongue body 1, the volute tongue body 1 having a drainage wall 11, an intra-tongue flow surface 12, and a drainage channel 13, the drainage channel 13 extending from the drainage wall 11 toward the intra-tongue flow surface 12 to guide an airflow portion at the drainage wall 11 toward the intra-tongue flow surface 12, and a channel opening and closing mechanism for controlling opening or closing of the drainage channel 13. In this technical solution, due to the channel opening and closing mechanism, the air flow generated by the rotation of the impeller 2 is selectively led to the tongue inner flow surface 12 from the drainage wall 11 at the inlet 131 of the drainage channel 13, and finally the circumferential rotation speed of the impeller 2 is reduced at the tongue small space 4 between the impeller 2 and the tongue inner flow surface 12, so that the noise of the cross flow fan and even the air conditioner applying the same is reduced, due to the adoption of the channel opening and closing mechanism, the drainage channel 13 can be opened or closed in a matched manner according to the rotation speed of the impeller 2, the circumferential rotation speed of the drainage channel 13 can be adjusted more specifically under the condition that the wind speed (which is related to the selection of the rotation speed of the impeller 2) is changed, so that the noise of the cross flow fan can be effectively reduced, and on the other hand, due to the fact that the drainage channel 13 can be selectively opened or closed, under the condition that the rotation speed of the impeller is small, the number or the air entraining effect is low, the remaining drainage channel 13 can be opened, so that the fan performance can be prevented from being attenuated, and the fan performance can be guaranteed.
In order to increase the influence degree of the air flow backflow on the circumferential rotation speed of the impeller 2, the inlet 131 of the drainage channel 13 should be disposed in a region of the drainage wall 11 near one side of the impeller 2, specifically, a plane perpendicular to the axis of the impeller 2 is a first plane, the drainage wall 11 and the tongue inner flow surface 12 are connected through the air flow splitting surface 17, a projection of the air flow splitting surface 17 on the first plane forms a first arc, a first line segment is disposed through the center of the first arc, the first line segment is perpendicular to the drainage wall 11, a projection of the drainage wall 11 on the first plane forms a second line segment, the first line segment intersects with the second line segment at a first point, the drainage wall 11 has a first length L from the first point along the air outlet direction, the drainage wall 11 in a range of 0-60% L from the first point is a first interval, the drainage wall 11 has the inlet 131 of the drainage channel 13, and the inlet 131 is disposed on the first interval. Further, the first section includes a second section, the drainage wall 11 ranging from 0 to 40% l from the first point is the second section, and the inlet 131 is disposed in the second section.
In order to reduce the resistance along the drainage channel 13 as much as possible, preferably, the drainage channel 13 is an arc channel, although the arc channel herein may be a smooth connection curve of multiple arcs with different curvature radii, and the smooth curve should be curved towards one side of the impeller 2, and further, it is better to use an arc with a single curvature radius, at this time, the resistance along the drainage channel 13 will be further reduced, which can definitely further improve the influence of the air flow in the drainage channel 13 on the air flow at the small tongue space 4, and further reduce the noise of the through-flow fan during operation.
In order to fully utilize the wind speed of the air flowing out of the impeller 2, it is preferable that the flow guiding channel 13 has a first tangent line at the inlet 131, and the first tangent line forms an air flow deflection angle A with the flow guiding wall 11 near one side of the impeller 2, wherein 0 degrees is less than A < 90 degrees, more particularly, 0 degrees is less than A < 50 degrees, more particularly, the closer to 0 degrees, the higher the wind speed of the air flowing out of the impeller 2 at the inlet 131 is, which naturally further reduces the circumferential rotation speed of the impeller 2, and certainly is more beneficial to reducing the noise of the cross flow fan and even the air conditioner.
Preferably, the number of the drainage channels 13 is at least three, and the at least three drainage channels 13 are staggered on the drainage wall 11 along the axial direction of the impeller 2; further, the number of the at least three drainage channels 13 is at least three, the at least three drainage channels 13 are staggered on the drainage wall 11 along the air outlet direction, and further, the distances between two adjacent drainage channels 13 can be equal or unequal, which is favorable for carrying out necessary adjustment on the distance between the drainage channels 13 according to different fan performances in the production and manufacturing process, has stronger pertinence, and is more favorable for reducing the noise of the cross-flow fan.
The number of the drainage channels 13 can be set according to actual needs, and considering that progressive control combinations among the drainage channels 13 are utilized, preferably, the number of the drainage channels 13 is k,3 is less than or equal to k, the k drainage channels 13 are sequentially arranged along the radial direction of the impeller 2, and in order to simplify the manufacturing process of the volute tongue, too many drainage channels 13 are prevented from being arranged to reduce the rigidity of the volute tongue body 1, and further, 3 is less than or equal to k is less than or equal to 5.
For the drainage channels 13, one forming mode may be a mode of directly arranging channels on the volute tongue body 1, the positions of the modes are relatively fixed, the corresponding channel opening and closing mechanism modes are described in the following, the volute tongue body 1 comprises k+1 tongue body monomers 14, namely a first monomer, a second monomer, … and a k+1 monomer, the first monomer, the second monomer, … and the k+1 monomer are sequentially arranged in the radial direction of the impeller 2, one drainage channel 13 is formed between two adjacent tongue body monomers 14, k+1 drainage channels 13 are formed between the two tongue body monomers 14, the first channel, the second channel, … and the k channel are sequentially arranged in the radial direction of the impeller 2, the channel opening and closing mechanisms of the first channel, the second channel, … and the k channel are respectively controlled to be k groups, and each group of channel opening and closing mechanisms of the channels is respectively controlled to be opened or closed by k groups of the drainage channels 13.
As a specific embodiment of the channel opening and closing mechanism, preferably, the channel opening and closing mechanism includes a transmission rod 3 and a driving component (not shown in the figure), the driving component drives the tongue body units 14 to reciprocate in the radial direction of the impeller 2 through the transmission rod 3 so as to realize the opening or closing of the drainage channel 13, and in this way, the driving component can be controlled to perform the driving change of the relative positions of the tongue body units 14, so that the drainage channel 13 formed between two adjacent tongue body units 14 is opened or closed, and the implementation manner is novel and simple.
Furthermore, the transmission rod 3 is provided with a threaded hole, the driving part comprises a motor, the output end of the motor is in threaded connection with the threaded hole, when the motor runs, the motor is converted into reciprocating motion of the tongue body single body 14 through circular motion of the output end meshed with the threads of the transmission rod 3, and the motion of the tongue body single body 14 is simpler and easier to implement in control by adopting control of the motor.
In order to ensure the reliability of the movement and the controllability of the movement track between the tongue units 14, it should be ensured that an integral body is formed between the tongue units 14, for example, the tongue units 14 are slidably connected to a common base, preferably, one side of the volute tongue body 1 has an anti-falling chute, and a guide plate (not shown in the figure) is further included, and the guide plate has a sliding raised strip, and the sliding raised strip is slidably connected with the anti-falling chute in a matching manner.
As described above, one forming manner of the drainage channel 13 may be a form of directly providing a channel on the volute tongue body 1, and for this case, preferably, the channel opening and closing mechanism includes an electronically controlled one-way valve (not shown in the figure), where the electronically controlled one-way valve is disposed in the drainage channel 13, and it is simpler to use the electronically controlled one-way valve to open and close the drainage channel 13.
In order to ensure quick opening and closing of the air flow in the drainage channel 13, preferably, the electrically controlled one-way valve is disposed at the inlet 131 of the drainage channel 13, and at this time, since the electrically controlled one-way valve is disposed at the inlet 131 of the drainage channel 13, the influence on the air outlet of the volute tongue (the air flow is prevented from flowing into the channel between the electrically controlled one-way valve and the inlet 131 of the drainage channel 13 under the condition that the drainage channel 13 is closed) can be effectively prevented.
According to the embodiment of the invention, the through-flow fan comprises the volute tongue, the opening and closing of the drainage channel 13 can be controlled gradually, the speed of the through-flow fan is matched with that of the impeller 2, the tongue noise of the through-flow fan in the full speed range can be controlled, and meanwhile the problem that the performance of the fan is greatly attenuated is avoided.
According to the embodiment of the invention, the air conditioner is further provided, and the air conditioner comprises the cross flow fan, wherein the cross flow fan can gradually control the opening and closing of the drainage channel 13 and match with the rotating speed of the impeller 2, so that the tongue noise of the cross flow fan in a full rotating speed range can be controlled, and meanwhile, the problem of great attenuation of the performance of the fan is avoided.
According to an embodiment of the present invention, the present invention further provides a method for controlling a volute tongue, which is used for controlling the volute tongue, and includes the following steps:
a. selecting a supplementary gear i, wherein i=1, 2, 3, …, k;
b. the drainage channel 13 matched with the air supplementing gear i is controlled to be opened or closed.
Through the above steps, after the air supplementing gear i is selected, the opening and closing of the drainage channel 13 matched with the selected air supplementing gear i can be controlled in real time, further, the air supplementing gear i is directly related to the rotating speed of the impeller 2 (fan), the number of the gears of the air supplementing gear i is related to the number k of the drainage channels 13 in the volute tongue body 1, the highest gear i is equal to the number of the drainage channels 13, specifically, when the number of the drainage channels 13 is 5 (k=5), the air supplementing gear i=1, 2, 3, 4, 5, namely the air supplementing gear i is divided into 5 gears, namely a fifth gear, a fourth gear, a third gear, a second gear and a first gear, respectively, wherein the fifth gear corresponds to the rotating speed of the impeller 2, the first gear corresponds to the lowest rotating speed of the impeller 2, the fifth gear corresponds to the five channels 13 to be fully opened in the aspect of matching the air supplementing gear i with the drainage channels 13, the drainage effect is optimal (the maximum), and the fifth gear corresponds to any one of the fifth gears to be opened, and the corresponding impeller 13 cannot be reversely closed due to the fact that the corresponding rotating speed of the volute tongue 2 is not matched with the lowest rotating speed, and the corresponding noise can be attenuated.
In order to make the control method more clear, the matching of the number k of the drainage channels 13 to i is described in detail below.
For example, when k=5, the air supplementing gear i is obtained, i is equal to any one of 1, 2, 3, 4 and 5, and when i=5, the gear is the fifth gear, and all five drainage channels 13 are controlled to be opened; when i=4, the gear is the fourth gear, any four of the five drainage channels 13 are controlled to be opened, and the rest one drainage channel 13 is controlled to be closed; when i=3, the three gear is the third gear, any three of the five drainage channels 13 are controlled to be opened, and the remaining two drainage channels 13 are controlled to be closed; when i=2, the gear is the second gear, any two of the five drainage channels 13 are controlled to be opened, and the remaining three drainage channels 13 are controlled to be closed; when i=1, the first gear is used, any one of the five drainage channels 13 is controlled to be opened, and the remaining four drainage channels 13 are controlled to be closed. As known from the background art, the more distant the impeller 2 is, the less the air-supplementing effect is, the more close the impeller 2 is, for convenience of description, for the case of five drainage channels 13, the fifth channel, the fourth channel, the third channel, the second channel, the first channel which are farthest to nearest the impeller 2 are sequentially denoted as A, B, C, D, E, so that it can be known that when i=5, A, B, C, D, E is fully opened; when i=4, A, B, C, D opens E closed, or A, B, C, E opens D closed, or A, B, D, E opens C closed, or A, C, D, E opens B closed, or B, C, D, E opens a closed; i=3, A, B, C open D, E closed, or A, B, D open C, E closed, or A, B, E open C, D closed, or B, C, D open A, E closed, or B, C, E open A, D closed, or C, D, E open A, B closed, or A, C, D open B, E closed, or A, C, E open B, D closed, or A, D, E open B, C closed, or B, D, E open A, C closed; i=2, A, B, C closed D, E open, or A, B, D closed C, E open, or A, B, E closed C, D open, or B, C, D closed A, E open, or B, C, E closed A, D open, or C, D, E closed A, B open, or A, C, D closed B, E open, or A, C, E closed B, D open, or A, D, E closed B, C open, or B, D, E closed A, C open; when i=1, a, B, C, D closes E open, or A, B, C, E closes D open, or A, B, D, E closes C open, or A, C, D, E closes B open, or B, C, D, E closes a open. It can be seen that by adopting this control method, the opening and closing of the drainage channels 13 of the volute tongue can be controlled progressively, it is understood that the air supplementing effect will be better as the combination of the drainage channels 13 is closer to the impeller 2, and it is also understood that when the rotation speed of the impeller 2 is higher (the air supplementing gear i is correspondingly higher), the combination of the drainage channels 13 is preferable.
Preferably, when k=4, the air supplementing gear i is obtained, i is equal to any one of 1, 2, 3 and 4, and when i=4, the gear is a fourth gear, and all four drainage channels 13 are controlled to be opened; when i=3, the third gear is adopted, any three of the four drainage channels 13 are controlled to be opened, and the rest one drainage channel 13 is controlled to be closed; when i=2, the second gear is adopted, any two of the four drainage channels 13 are controlled to be opened, and the remaining two drainage channels 13 are controlled to be closed; when i=1 is the first gear, any one of the four drainage channels 13 is controlled to be opened, the remaining three drainage channels 13 are controlled to be closed, and a specific matching mode is available in the same way as when i=5, and is not repeated here.
Preferably, when k=3, the air supplementing gear i is obtained, i is equal to any one of 1, 2 and 3, and when i=3, the gear is a third gear, and all three drainage channels 13 are controlled to be opened; when i=2, the second gear is used for controlling any two of the three drainage channels 13 to be opened, and the rest one drainage channel 13 is closed; when i=1 is the first gear, any one of the three drainage channels 13 is controlled to be opened, and a specific matching mode is available in the same way as i=5, and is not repeated here.
Preferably, when the channel opening and closing mechanism comprises a transmission rod 3 and a driving part, the driving part is controlled to operate, so that the driving part drives the tongue body 14 to reciprocate in the radial direction of the impeller 2 through the transmission rod 3, and the drainage channel 13 is opened or closed.
Preferably, when the channel opening and closing mechanism comprises electrically controlled check valves, each electrically controlled check valve is controlled to conduct or close the drainage channel 13.
It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (23)
1. The utility model provides a volute tongue, its characterized in that includes volute tongue body (1), volute tongue body (1) has drainage wall (11), tongue interior flow surface (12), drainage passageway (13), wherein, tongue interior flow surface (12) be volute tongue body (1) with the wall that impeller (2) set up relatively, drainage wall (11) are volute tongue body (1) with the wall that the air-out air current of impeller (2) contacted, just tongue interior flow surface (12) are in between impeller (2) with drainage wall (11), drainage passageway (13) are by drainage wall (11) to tongue interior flow surface (12) extend, with will the air current part of drainage wall (11) department is directed to tongue interior flow surface (12), still include passageway opening and closing mechanism, passageway opening and closing mechanism is used for control opening or closing of drainage passageway (13), drainage wall (11), tongue interior flow surface (12) are in through air current branch flow surface (17) connection, tongue interior flow surface (12) are in impeller (17) are located in impeller (17) are close to one side flow surface (17) is located in impeller (17).
2. A volute tongue according to claim 1, wherein the plane perpendicular to the axis of the impeller (2) is a first plane, the projection of the airflow splitting surface (17) on the first plane forms a first circular arc, a first line segment is arranged through the center of the first circular arc, the first line segment is perpendicular to the drainage wall (11), the projection of the drainage wall (11) on the first plane forms a second line segment, the first line segment intersects with the second line segment at a first point, the drainage wall (11) has a first length L from the first point along the air outlet direction, the drainage wall (11) in the range of 0-60% L from the first point is a first interval, the drainage wall (11) has an inlet (131) of the drainage channel (13), and the inlet (131) is arranged on the first interval.
3. A volute tongue according to claim 2, wherein the first section comprises a second section, the drainage wall (11) in the range of 0-40% l from the first point being the second section, the inlet (131) being arranged on the second section.
4. A volute tongue according to claim 3, wherein the drainage channel (13) is an arcuate channel.
5. A volute tongue according to claim 4, wherein the drainage channel (13) has a first tangent at the inlet (131) that forms an air flow deflection angle a with the drainage wall (11) on the side close to the impeller (2), 0 ° < a < 90 °.
6. A volute tongue according to claim 5, wherein 0 ° < a < 50 °.
7. A volute tongue according to any one of claims 1 to 6, wherein the number of drainage channels (13) is at least three, the at least three drainage channels (13) being staggered on the drainage wall (11) in the direction of the air outlet.
8. A volute tongue according to any one of claims 1 to 6, wherein the number of the drainage channels (13) is k, 3.ltoreq.k, and the k drainage channels (13) are arranged in sequence along the radial direction of the impeller (2).
9. The volute tongue of claim 8, wherein 3.ltoreq.k.ltoreq.5.
10. Volute tongue according to claim 9, characterized in that the volute tongue body (1) comprises k+1 tongue body monomers (14) which are respectively a first monomer, a second monomer, … and a k+1 monomer, the first monomer, the second monomer, the … and the k+1 monomer are sequentially arranged in the radial direction of the impeller (2), one drainage channel (13) is formed between two adjacent tongue body monomers (14), k+1 drainage channels (13) are formed between the tongue body monomers (14), the first channel, the second channel, the … and the k channel are respectively arranged in sequence along the radial direction of the impeller (2), the channel opening and closing mechanisms are k groups, each group of channel opening and closing mechanisms respectively control the opening or closing of each drainage channel (13), and the k groups of channel opening and closing mechanisms respectively control the opening or closing of the k drainage channels (13).
11. A volute tongue according to claim 10, wherein the channel opening and closing mechanism comprises a transmission rod (3) and a driving component, and the driving component drives the tongue body (14) to reciprocate in the radial direction of the impeller (2) through the transmission rod (3) so as to realize the opening or closing of the drainage channel (13).
12. A volute tongue according to claim 11, wherein the transmission rod (3) has a threaded hole, and the driving means comprises a motor, the output end of which is screwed into the threaded hole, and when the motor is operated, the motor is converted into a reciprocating motion of the tongue element (14) by a circumferential motion of the output end in threaded engagement with the transmission rod (3).
13. A volute tongue according to claim 10, characterized in that one side of the volute tongue body (1) is provided with an anti-slip chute, and that the volute tongue further comprises a guide plate, on which a sliding rib is provided, the sliding rib being slidingly connected in a matching manner with the anti-slip chute.
14. A volute tongue according to claim 9, wherein the channel opening and closing mechanism comprises an electrically controlled one-way valve arranged in the drainage channel (13).
15. A volute tongue according to claim 14, wherein the electrically controlled one-way valve is arranged at an inlet (131) of the drainage channel (13).
16. A cross flow fan comprising a volute tongue, wherein the volute tongue is a volute tongue according to any one of claims 1 to 9.
17. An air conditioner comprising a cross flow fan, wherein the cross flow fan is the cross flow fan of claim 16.
18. A volute tongue control method for controlling a volute tongue according to any one of claims 8 to 15, comprising the steps of:
a. selecting a supplementary gear i, wherein i=1, 2, 3, …, k;
b. and controlling a drainage channel (13) matched with the air supplementing gear i to be opened or closed.
19. A volute tongue control method according to claim 18, wherein when the channel opening and closing mechanism comprises a transmission rod (3) and a driving component, the driving component is controlled to operate, so that the driving component drives the tongue body (14) to reciprocate in the radial direction of the impeller (2) through the transmission rod (3) to realize opening or closing of the drainage channel (13).
20. A volute tongue control method according to claim 18, wherein when the channel opening and closing mechanism comprises electrically controlled one-way valves, each electrically controlled one-way valve is controlled to conduct or close the drainage channel (13).
21. The volute tongue control method according to claim 18, characterized in that when k=5, an air supplementing gear i is obtained, i is equal to any one of 1, 2, 3, 4, 5, and when i=5, is a fifth gear, and five drainage channels (13) are controlled to be all opened; when i=4, the gear is a fourth gear, any four of the five drainage channels (13) are controlled to be opened, and the rest one drainage channel (13) is controlled to be closed; when i=3, the valve is in a third gear, any three of the five drainage channels (13) are controlled to be opened, and the remaining two drainage channels (13) are controlled to be closed; when i=2, the gear is the second gear, any two of the five drainage channels (13) are controlled to be opened, and the remaining three drainage channels (13) are controlled to be closed; when i=1, the first gear is used for controlling any one of the five drainage channels (13) to be opened, and the remaining four drainage channels (13) are controlled to be closed.
22. The volute tongue control method according to claim 18, characterized in that when k=4, an air supplementing gear i is obtained, i is equal to any one of 1, 2, 3, 4, and when i=4, the fourth gear is used for controlling all four drainage channels (13) to be opened; when i=3, the three gears are third, any three of the four drainage channels (13) are controlled to be opened, and the rest one drainage channel (13) is controlled to be closed; when i=2, the device is in a second gear, any two of the four drainage channels (13) are controlled to be opened, and the remaining two drainage channels (13) are controlled to be closed; when i=1, the first gear is used for controlling any one of the four drainage channels (13) to be opened, and the remaining three drainage channels (13) are controlled to be closed.
23. A volute tongue control method according to claim 18, characterized in that when k=3, a gas-supplementing gear i is obtained, i being equal to any one of 1, 2, 3, and when i=3, a third gear is used, and three drainage channels (13) are controlled to be all opened; when i=2, the device is in a second gear, any two of the three drainage channels (13) are controlled to be opened, and the rest one drainage channel (13) is controlled to be closed; when i=1, the valve is in the first gear, and any one of the three drainage channels (13) is controlled to be opened.
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| CN201810668479.4A CN108916116B (en) | 2018-06-26 | 2018-06-26 | Volute tongue, volute tongue control method, cross-flow fan and air conditioner |
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| CN201810668479.4A CN108916116B (en) | 2018-06-26 | 2018-06-26 | Volute tongue, volute tongue control method, cross-flow fan and air conditioner |
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| CN109882434B (en) * | 2019-04-01 | 2024-02-27 | 珠海格力电器股份有限公司 | Fan structure, fresh air device and air conditioner indoor unit |
| CN114440316B (en) * | 2022-01-30 | 2024-02-27 | 广东美的暖通设备有限公司 | Air duct assembly and air conditioning equipment with same |
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