CN113316689B - Rotary vane for drainage pump and drainage pump with same - Google Patents
Rotary vane for drainage pump and drainage pump with same Download PDFInfo
- Publication number
- CN113316689B CN113316689B CN201980088642.2A CN201980088642A CN113316689B CN 113316689 B CN113316689 B CN 113316689B CN 201980088642 A CN201980088642 A CN 201980088642A CN 113316689 B CN113316689 B CN 113316689B
- Authority
- CN
- China
- Prior art keywords
- water flow
- diameter
- vane
- drain pump
- blade
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/14—Pumps raising fluids by centrifugal force within a conical rotary bowl with vertical axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2210/00—Working fluids
- F05D2210/10—Kind or type
- F05D2210/11—Kind or type liquid, i.e. incompressible
-
- 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
- F24F13/22—Means for preventing condensation or evacuating condensate
Abstract
Provided is a rotary vane for a drain pump, which can effectively improve quietness, and a drain pump having the rotary vane for a drain pump. The rotary vane (30) of the drain pump (1) has a water flow introduction restriction portion (39) provided below a water flow direction restriction portion (38) that is an outer end portion (33 c) of the large-diameter vane (33) and an outer end portion (35 c) of the auxiliary vane (35). The water flow introduction restriction portion (39) protrudes radially outward and rearward in the rotational direction than the water flow direction restriction portion (38). The flow (F2) of water passing through the vicinity of the lower part of the water flow direction regulating part (38) of the large-diameter blade (33) is guided to the radial outside and the rear side in the rotation direction by the water flow introducing regulating part (39).
Description
Technical Field
The present invention relates to a drain pump used for an indoor unit of an air conditioner, for example, and a drain pump rotary vane provided in the drain pump.
Background
In an indoor unit of an air conditioner, moisture in air condenses and adheres to a heat exchanger during a cooling operation. The moisture adhering to the heat exchanger drops down to the drain pan as water droplets. Then, the water (condensed water) accumulated in the drain pan is discharged to the outside of the indoor unit by the drain pump. An example of a drain pump for an air conditioner is disclosed in patent document 1.
Fig. 10 shows a rotary vane used for the drain pump of patent document 1. Fig. 10 (a) to (c) are perspective views, plan views, and front views of a part of the rotary blade. The rotary vane 930 has a plurality of flat large-diameter vanes 933 disposed at equal angular intervals and a plurality of flat auxiliary vanes 935 disposed between adjacent large-diameter vanes 933. The lower ends of the large-diameter blades 933 and the auxiliary blades 935 are connected by an annular connecting portion 936 having an opening 937 provided at the center.
A columnar water flow direction regulating portion 938 is provided at an outer end portion 933c of the large-diameter blade 933. The water flow direction regulating portion 938 is also provided at the outer end 935c of the auxiliary vane 935. The rotating blade 930 achieves high quietness by restricting the flow of water by the water flow direction restricting portion 938.
Prior art literature
Patent literature
Patent document 1: japanese patent No. 6375285
Technical problem to be solved by the invention
When the rotary blade 930 rotates, water that collides with the water-repellent surface 933a of the large-diameter blade 933 toward the front in the rotation direction passes through the upper end 933b and the outer end 933c of the large-diameter blade 933 to the rear side of the large-diameter blade 933. At this time, since water is mainly supplied from the upper end portion 933b to the rear side of the large-diameter blade 933, the negative pressure is larger near the rear surface of the large-diameter blade 933 than near the upper end portion 933 b. Therefore, the flow of water passing through the vicinity of the lower portion (schematically indicated by arrow f2 in fig. 10) is greatly introduced radially inward, as compared with the flow of water passing through the vicinity of the upper portion of the outer end portion 933c of the large-diameter blade 933 (schematically indicated by arrow f1 in fig. 10), and there is a case where the flow f1 of water is deviated from the flow f2 of water in the radial direction. Thus, in the water-repellent surface 935a of the auxiliary blade 935 immediately after the large-diameter blade 933, vibration may be generated due to a difference in the position of collision with water in the portion near the upper end 935b and the portion near the lower end, resulting in noise.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a rotary vane for a drain pump and a drain pump having the same, which can effectively improve quietness.
Technical means for solving the technical problems
In order to achieve the above object, a rotary vane for a drain pump according to an embodiment of the present invention includes: a shaft portion; a plurality of large diameter blades extending radially from the shaft portion; a plurality of small-diameter blades connected to lower ends of the plurality of large-diameter blades; and an annular connecting portion connecting lower ends of the plurality of large-diameter blades, wherein the annular connecting portion has a water flow introduction restricting portion provided at a lower portion of an outer end portion of the large-diameter blades and protruding at least one of radially outward and rotationally rearward from an upper portion of the outer end portion.
In the present invention, it is preferable that the water flow guide device further comprises a plurality of auxiliary blades disposed between the plurality of large-diameter blades, and a water flow guide restriction portion provided at a lower portion of an outer end portion of the auxiliary blades and protruding at least one of radially outward and rotationally rearward from an upper portion of the outer end portion.
In the present invention, it is preferable that the water flow introduction limiting portion is formed in an oblong or oval shape in plan view.
In the present invention, it is preferable that the water flow introduction limiting portion is formed in a wedge shape having an upper surface inclined upward from the front to the rear in the rotation direction.
In order to achieve the above object, a drain pump according to another aspect of the present invention includes: a housing having a suction pipe provided with a suction port facing downward; a rotary blade housed in the housing; and a motor that rotates the rotary vane, the rotary vane being the rotary vane for the drain pump.
Effects of the invention
According to the present invention, the water flow introduction limiting portion is provided at a lower portion of an outer end portion of the large-diameter blade, and protrudes at least one of radially outward and rearward in a rotational direction from an upper portion of the outer end portion. Thus, the flow of water passing through the vicinity of the lower portion of the outer end portion of the large-diameter blade is guided radially outward or rearward in the rotational direction by the water flow introduction restriction portion. Therefore, the flow of water passing through the vicinity of the lower portion of the outer end portion of the large-diameter blade can be suppressed from being greatly introduced to the rear side of the large-diameter blade. Therefore, in the water-repellent surface immediately after the large-diameter blade, it is possible to suppress occurrence of a difference in collision between water and a portion near the upper end portion and a portion near the lower end portion, suppress noise generated by vibration, and effectively improve quietness.
Drawings
Fig. 1 is a diagram showing a drain pump according to a first embodiment of the present invention.
Fig. 2 is a view showing a rotary vane for the drain pump of fig. 1.
Fig. 3 is an enlarged view of a portion of the rotary blade of fig. 2.
Fig. 4 is a graph showing the noise levels of the drain pump of fig. 1 and the conventional drain pump.
Fig. 5 is a diagram showing a structure of a modification of the rotary blade of fig. 2.
Fig. 6 is a view showing a structure of another modification of the rotary blade of fig. 2.
Fig. 7 is a view showing a rotary vane of a drain pump according to a second embodiment of the present invention.
Fig. 8 is an enlarged view of a portion of the rotary blade of fig. 7.
Fig. 9 is a diagram showing a structure of a modification of the rotary blade of fig. 7.
Fig. 10 is a view showing a rotary vane of a conventional drain pump.
Detailed Description
(first embodiment)
Hereinafter, the structure of the drain pump according to the first embodiment of the present invention will be described with reference to fig. 1 to 6. As an example, the drain pump of the present embodiment is used to drain condensed water stored in a drain pan of an indoor unit of an air conditioner to the outside. Of course, the use of the drain pump is not limited to the drainage of condensed water, and can be used for drainage of various liquids, water drawing, and the like. The same applies to the drain pump of the second embodiment described later.
Fig. 1 is a diagram showing a drain pump according to a first embodiment of the present invention. Specifically, fig. 1 is a front view including a partial cross-sectional view of a lower portion of a drain pump cut off with a plane passing through an axis of a drain pipe. Fig. 2 is a view showing a rotary vane for the drain pump of fig. 1. Fig. 3 is an enlarged view of a portion of the rotary blade of fig. 2. Fig. 4 is a graph showing the noise levels of the drain pump of fig. 1 and the conventional drain pump. Fig. 5 is a diagram showing a structure of a modification of the rotary blade of fig. 2. Fig. 6 is a view showing a structure of another modification of the rotary blade of fig. 2. Fig. 2, 3, 5, and 6 (a) to (c) are a perspective view, a plan view, and a front view in this order.
As shown in fig. 1, the drain pump 1 of the present embodiment has a housing 10, a cover 20, a rotary blade 30 as a rotary blade for the drain pump, and a motor 40. In the present embodiment, the housing 10, the cover 20, and the rotary blade 30 are made of synthetic resin.
The housing 10 integrally includes a main body 11, a suction pipe 16, and a discharge pipe 18. The main body 11 has a bottom wall 12 and a peripheral wall 13, the bottom wall 12 having an inverted truncated cone shape, and the peripheral wall 13 being provided so as to be continuous with an outer peripheral edge of the bottom wall 12. The suction pipe 16 extends downward from the center of the bottom wall 12. A suction port 17 facing downward is provided at the lower end of the suction pipe 16. The discharge pipe 18 extends laterally (rightward in fig. 1) from the peripheral wall portion 13. A discharge port 19 facing laterally is provided at the top end of the discharge pipe 18. A drain inlet 15 serving as an inlet to the drain 18 is provided in the peripheral wall portion 13 of the main body portion 11.
The housing 10 has a space in which a rotary vane 30 described later is disposed on the inner side thereof, and the housing 10 surrounds the space together with the cover 20 to form (partition) the pump chamber 25.
The cover 20 has a substantially cylindrical shape, and a lower end portion thereof is fitted into an upper opening of the main body 11 of the housing 10 and fixedly attached to the housing 10 by a not-shown locking mechanism. A bracket 22 is attached to the upper end of the cover 20 via a locking portion 21. The bracket 22 is provided with a mounting portion 23 for mounting the drain pump 1 to another device. The cover 20 accommodates a motor 40 that rotates the rotary blade 30.
The rotary vane 30 is rotatably accommodated in the pump chamber 25. As shown in fig. 2 and 3, the rotary vane 30 includes a shaft 31, a plurality of large-diameter vanes 33, a plurality of small-diameter vanes 34, a plurality of auxiliary vanes 35, a connecting portion 36, a plurality of water flow direction regulating portions 38, and a plurality of water flow introduction regulating portions 39. The large diameter vane 33, the small diameter vane 34, and the auxiliary vane 35 are formed in a flat plate shape. In the present embodiment, four large diameter blades 33, four small diameter blades 34 and four auxiliary blades 35 are provided. In addition, a structure in which the auxiliary blade 35 is omitted may be employed. In fig. 2 (b), the rotary blade 30 rotates counterclockwise around the shaft 31.
The shaft 31 is formed in a cylindrical shape and passes through the through hole 24 provided in the center of the cover 20. A mounting hole 32 is provided at the upper end of the shaft 31. The drive shaft 41 of the motor 40 is fitted into the mounting hole 32.
The plurality of large diameter blades 33 extend radially (radially outward) from the outer peripheral surface of the shaft 31. The large diameter blades 33 are arranged at equal angular intervals (90 degree intervals in the present embodiment) around the shaft portion 31.
A plurality of small diameter blades 34 are provided in connection with a portion near the shaft portion 31 in the lower end portion of each large diameter blade 33. The small diameter vane 34 extends downward from a portion connected to the large diameter vane 33. A plurality of small diameter blades 34 are inserted into the suction pipe 16. The plurality of small diameter blades 34 are arranged at equal angular intervals (90 degree intervals in the present embodiment) around the shaft portion 31.
The plurality of auxiliary blades 35 are disposed on a coupling portion 36 described later. The auxiliary vane 35 is disposed in the middle of the large-diameter vane 33 adjacent in the rotational direction. The auxiliary blade 35 extends radially from the inner peripheral edge of the connecting portion 36. The auxiliary blade 35 is not connected to the shaft portion 31.
The connecting portion 36 has an inverted truncated cone shape and is formed in a circular ring shape having an opening 37 at the center. The connecting portion 36 connects the lower end portions of the large diameter blades 33 and the auxiliary blades 35 to each other.
The water flow direction regulating portion 38 is formed in a columnar shape having an oblong shape in plan view (cross-sectional shape). In the present embodiment, the water flow direction regulating portion 38 has an oblong shape with a diameter larger toward the front than the diameter toward the rear in the rotation direction in a plan view. The water flow direction regulating portion 38 is provided as an end portion (outer end portion 33 c) of the large-diameter vane 33 and the auxiliary vane 35 near the radially outer side so as to extend in the up-down direction. The upper end portion of the water flow direction regulating portion 38 provided on the large-diameter vane 33 protrudes upward from the upper end portion 33b of the large-diameter vane 33. By providing the water flow direction regulating portion 38 to the large diameter blade 33, when the rotary blade 30 rotates, three-dimensional collision between the flow of water passing through the upper end portion 33b and the flow of water passing through the outer end portion 33c is suppressed in the vicinity of the corner where the upper end portion 33b and the outer end portion 33c intersect. This makes it possible to reduce turbulence by making the water flow near the corner two-dimensional, and to suppress the mixing of bubbles into the water flow. The water flow direction regulating portion 38 provided in the auxiliary vane 35 also has the same function.
The water flow introduction limiting portion 39 is formed in a substantially wedge shape having an oblong shape in plan view, and an upper surface 39a is inclined upward from the front to the rear in the rotation direction. The water flow introduction restriction portion 39 is integrally provided at a lower portion of the water flow direction restriction portion 38, and the water flow direction restriction portion 38 is provided to the large diameter vane 33 and the auxiliary vane 35.
In the present embodiment, the water flow introduction restriction portion 39 has a planar shape that extends radially outward and rearward in the rotational direction from the planar shape of the water flow direction restriction portion 38, and has a diameter near the front in the rotational direction that is larger than an oblong shape near the rear. That is, the water flow introduction restriction portion 39 protrudes radially outward and rearward in the rotational direction from the upper portion of the water flow direction restriction portion 38 that is the outer end portion 33c of the large-diameter vane 33 and the outer end portion 35c of the auxiliary vane 35. The water flow introduction limiting portion 39 may have another shape such as an oval shape, a rectangular shape, or a triangular shape, as long as the object of the present invention is not impaired.
Next, the operation of the water flow introduction limiting portion 39 provided in the large-diameter vane 33 will be described with reference to fig. 3. The water flow introduction limiting portion 39 provided in the auxiliary vane 35 also has the same function.
When the rotary vane 30 rotates, water is sucked up from the suction port 17 to the pump chamber 25 through the suction pipe 16. In the pump chamber 25, a part of the water that collides with the water-repellent surface 33a of the large-diameter vane 33 toward the front in the rotation direction flows to the rear side of the large-diameter vane 33 through the upper end 33b of the large-diameter vane 33, and the other part flows to the rear side of the large-diameter vane 33 through the outer end 33c of the large-diameter vane 33. At this time, since water is mainly supplied from the upper end portion 33b to the rear side of the large-diameter blade 33, the negative pressure is larger in the vicinity of the rear surface of the large-diameter blade 33 than in the portion near the upper end portion.
Here, attention is paid to the flow of water passing through the outer end 33c of the large-diameter vane 33. The flow of water (schematically indicated by arrow F2 in fig. 3) passing through the vicinity of the lower portion of the outer end portion 33c gradually goes upward along the upper surface 39a of the water flow introduction restriction portion 39. Therefore, the water supplied to the vicinity of the side surface 39b of the water flow introduction restriction portion 39 by the flow F2 of the water along the upper surface 39a becomes small, and negative pressure is generated in the vicinity of the side surface 39 b. Thereby, the flow F2 of water along the upper surface 39a is attracted from midway of the upper surface 39a to the side surface 39b side.
In addition, since the water flow introduction restriction portion 39 is oblong, a vortex flow (peeling flow) of the water peeled off from the side surface 39b is generated at a portion of the side surface 39b near the rear. Therefore, the flow F2 of water is greatly bulged outward so as to bypass the peeling flow after being sucked from the upper surface 39a to the side surface 39b side.
In this way, the water flow introduction restriction portion 39 bulges the flow F2 of water passing through the vicinity of the lower portion of the water flow direction restriction portion 38, which is the outer end portion 33c of the large-diameter vane 33, outward, thereby restricting the water from being sucked inward in the radial direction. This can suppress the radial deviation of the flow of water (schematically indicated by arrow F1 in fig. 3) passing through the vicinity of the upper portion of the water flow direction regulating portion 38 and the flow F2 of water passing through the vicinity of the lower portion on the water deflector surface 35a of the auxiliary blade 35 immediately after the large-diameter blade 33.
The inventors of the present invention examined the relationship between the lift and the noise level when the condensate was discharged by using the drain pump 1 (first embodiment) of the present embodiment and the drain pump (conventional example) having the conventional rotating blades shown in fig. 10. The verification result is shown in fig. 4. As shown in the graph of fig. 4, the drain pump of the first embodiment has less noise and improved quietness than the drain pump of the conventional example, regardless of the head.
As described above, the rotary vane 30 of the drain pump 1 of the present embodiment has the water flow introduction restriction portion 39, and the water flow introduction restriction portion 39 is provided below the water flow direction restriction portion 38 that is the outer end portion 33 of the large-diameter vane 33 and the outer end portion 35c of the auxiliary vane 35, and protrudes radially outward and rearward in the rotational direction than the water flow direction restriction portion 38. Thus, the flow F2 of water passing through the vicinity of the lower portion of the water flow direction regulating portion 38 is guided radially outward and rearward in the rotational direction by the water flow introduction regulating portion 39. Therefore, the flow F2 of water passing through the vicinity of the lower portion of the water flow direction regulating portion 38 can be prevented from being largely introduced into the rear side of the large-diameter vane 33 and the rear side of the auxiliary vane 35. Therefore, in the water-repellent surface 35a of the auxiliary blade 35 immediately after the large-diameter blade 33, the occurrence of a difference in collision between water and the portion near the upper end portion and the portion near the lower end portion can be suppressed. The same applies to the water surface 33a of the large-diameter blade 33 immediately after the large-diameter blade 33. Therefore, noise generated by vibration can be suppressed, and thus the quietness can be effectively improved.
Fig. 5 shows a rotary blade 30A as a modification of the rotary blade 30. The rotary vane 30A of this modification has a columnar water flow direction regulating portion 38A instead of the water flow direction regulating portion 38, and the rotary vane 30A of this modification has the same structure as the rotary vane 30 described above except that the upper end portion of the water flow direction regulating portion 38A is set to have the same height as the large-diameter vane 33 and the auxiliary vane 35 (i.e., the upper end portion does not protrude upward as compared to the large-diameter vane 33 and the auxiliary vane 35).
Fig. 6 shows a rotor blade 30B as another modification of the rotor blade 30. The rotary blade 30B of the other modification has the same structure as the rotary blade 30 described above except that the water flow direction regulating portion 38 is omitted.
The rotary blades 30A and 30B according to these modifications can also exhibit the same operational effects as those of the rotary blade 30 described above.
(second embodiment)
Hereinafter, a structure of a rotary vane included in a drain pump according to a second embodiment of the present invention will be described with reference to fig. 7 to 9.
Fig. 7 is a view showing a rotary vane of a drain pump according to a second embodiment of the present invention. Fig. 8 is an enlarged view of a portion of the rotary blade of fig. 7. Fig. 9 is a diagram showing a structure of a modification of the rotary blade of fig. 7. Fig. 7 to 9 (a) to (c) are a perspective view, a plan view, and a front view in this order. In the description of the present embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
As with the drain pump 1 of the first embodiment, the drain pump (not shown) of the present embodiment includes a casing 10, a cover 20, a rotary vane 130 as a rotary vane for the drain pump, and a motor 40.
The rotary vane 130 is rotatably accommodated in the pump chamber 25. The rotary blade 130 includes a shaft 31, a large-diameter blade 33, a small-diameter blade 34, an auxiliary blade 35, a connecting portion 36, a water flow direction regulating portion 38, and a water flow introduction regulating portion 139. The rotary blade 130 has a water flow introduction restriction portion 139 instead of the water flow introduction restriction portion 39 in the rotary blade 30 described in the first embodiment, and the rotary blade 130 has the same structure as the rotary blade 30 except that the shape of the water flow introduction restriction portion 139 is different from the water flow introduction restriction portion 39.
The water flow introduction restriction portion 139 is formed in a columnar shape having a planar shape (cross-sectional shape) that is one round longer than the water flow direction restriction portion 38 and has a lower height than the water flow direction restriction portion 38. The upper surface 139a of the water flow introduction restriction portion 139 is formed parallel to a plane orthogonal to the axial direction of the shaft portion 31. The water flow introduction restriction portion 139 is integrally provided at a lower portion of the water flow direction restriction portion 38, and the water flow direction restriction portion 38 is provided to the large diameter blade 33 and the auxiliary blade 35.
In the present embodiment, the water flow introduction restriction portion 139 has an oblong shape that protrudes radially outward and rotationally rearward from the top view of the water flow direction restriction portion 38, and has a larger diameter toward the front in the rotational direction than the diameter toward the rear. That is, the water flow introduction restriction portion 139 protrudes radially outward and rearward in the rotational direction from the upper portion of the water flow direction restriction portion 38 that is the outer end portion 33c of the large-diameter vane 33 and the outer end portion 35c of the auxiliary vane 35. The water flow introduction restricting portion 139 may have another shape such as an oval shape, a rectangular shape, or a triangular shape, as long as the object of the present invention is not impaired.
Next, the operation of the water flow introduction limiting portion 139 provided in the large-diameter vane 33 will be described with reference to fig. 8. The water flow introduction restricting portion 139 provided in the auxiliary vane 35 also has the same function.
When the rotary vane 130 rotates, water is sucked up from the suction port 17 to the pump chamber 25 through the suction pipe 16. In the pump chamber 25, a part of the water that collides with the water-repellent surface 33a of the large-diameter vane 33 toward the front in the rotation direction flows to the rear side of the large-diameter vane 33 through the upper end 33b of the large-diameter vane 33, and the other part flows to the rear side of the large-diameter vane 33 through the outer end 33c of the large-diameter vane 33. At this time, since water is mainly supplied from the upper end portion 33b to the rear side of the large-diameter blade 33, the negative pressure is larger in the vicinity of the rear surface of the large-diameter blade 33 than in the portion near the upper end portion.
Here, attention is paid to the flow of water passing through the outer end 33c of the large-diameter vane 33. The flow of water (schematically indicated by arrow F2 in fig. 8) passing through the vicinity of the lower portion of the outer end portion 33c flows along the side surface 139b of the water flow introduction restriction 139.
In addition, since the water flow introduction restriction portion 139 is oblong, a vortex flow (peeling flow) of the water peeled off from the side surface 139b is generated at a portion near the rear of the side surface 139 b. Therefore, the flow F2 of water greatly bulges outward so as to bypass the peeling flow.
In this way, the water flow introduction restriction portion 139 bulges the flow F2 of water passing through the vicinity of the lower portion of the water flow direction restriction portion 38, which is the outer end portion 33c of the large-diameter vane 33, outward, thereby restricting the water from being sucked inward in the radial direction. This can suppress the radial deviation of the flow of water (schematically indicated by arrow F1 in fig. 8) passing through the vicinity of the upper portion of the water flow direction regulating portion 38 and the flow F2 of water passing through the vicinity of the lower portion on the water deflector surface 35a of the auxiliary blade 35 immediately after the large-diameter blade 33. Therefore, in the water-repellent surface 35a of the auxiliary blade 35 immediately after the large-diameter blade 33, the occurrence of a difference in collision between water and the portion near the upper end portion 35b and the portion near the lower end portion (near the connecting portion 36) can be suppressed.
Fig. 9 shows a rotary blade 130A as a modification of the rotary blade 130. The rotary vane 130A of this modification has a columnar water flow direction regulating portion 38A instead of the water flow direction regulating portion 38, and the rotary vane 130A of this modification has the same structure as the rotary vane 130 described above except that the upper end portion of the water flow direction regulating portion 38A is set to have the same height as the large-diameter vane 33 and the auxiliary vane 35 (i.e., the upper end portion does not protrude upward as compared to the large-diameter vane 33 and the auxiliary vane 35).
The rotary vane 130 according to the second embodiment and the rotary vane 130A according to the modification thereof can also exhibit the same operational effects as those of the rotary vane 30 according to the first embodiment described above.
In the above embodiments, the water flow introduction restricting portions 39 and 139 are formed to protrude radially outward and rearward in the rotational direction from the water flow direction restricting portion 38 that is the outer end portion 33c of the large-diameter vane 33, but the present invention is not limited thereto. The water flow introduction limiting portion may be configured to protrude at least either radially outward or rotationally rearward from the outer end portions of the large-diameter blades and the auxiliary blades without departing from the object of the present invention.
Although the embodiments of the present invention have been described above, the present invention is not limited to these examples. Those skilled in the art will appropriately add, delete, change the design of the constituent elements and appropriately combine the features of the embodiments described above, and the configuration is included in the scope of the present invention as long as the gist of the present invention is not violated.
Symbol description
1 drain pump, 10 housing, 11 main body, 12 bottom wall, 13 peripheral wall, 15 drain inlet, 16 suction pipe, 17 suction inlet, 18 drain, 19 drain outlet, 20 cover, 21 lock, 22 bracket, 23 mount, 24 through hole, 25 pump chamber, 30 rotary vane, 31 shaft, 32 mount hole, 33 large diameter vane, 33a water-repelling surface, 33b upper end, 33c outer end, 34 small diameter vane, 35 auxiliary vane, 35a water-repelling surface, 35b upper end, 36 connecting portion, 37 opening, 38 water flow direction restricting portion, 39a upper surface, 39b side surface, 40 motor, 41 drive shaft, 930 rotary vane, 933 large diameter vane, 933a water-repelling surface, 933b upper end, 933c outer end, 935 auxiliary vane, 935a water-repelling surface, 935b upper end, 935c outer end, connecting portion, 937 opening, 936 water flow direction restricting portion, F1 water flow through the upper portion of the large diameter vane, F2 water flow through the large diameter vane upper end of the large diameter vane, F2 water flow through the large diameter vane lower end of the large diameter vane, and F2 water flow through the large diameter vane
Claims (6)
1. A rotary vane for a drain pump has: a shaft portion; a plurality of large diameter blades extending radially from the shaft portion; a plurality of small-diameter blades connected to lower ends of the plurality of large-diameter blades; and an annular connecting portion connecting lower end portions of the plurality of large-diameter blades,
it is characterized in that the method comprises the steps of,
a water flow introduction limiting portion provided at a lower portion of an outer end portion of the large-diameter blade and protruding at least one of radially outward and rearward in a rotation direction from an upper portion of the outer end portion,
the upper end of the water flow introducing limiting part is positioned below the upper end of the large-diameter blade,
an upward annular surface located at an outer peripheral edge portion of the connecting portion is located lower than an upper end of the water flow introduction limiting portion over the entire circumference.
2. The rotary vane for a drain pump according to claim 1, wherein,
and a plurality of auxiliary blades arranged among the plurality of large-diameter blades,
the water flow introduction limiting portion is provided at a lower portion of an outer end portion of the auxiliary blade and protrudes at least one of radially outward and rearward in a rotational direction from an upper portion of the outer end portion.
3. The rotary vane for a drain pump according to claim 1, wherein,
the water flow introduction restriction portion is formed in an oblong or oval shape in plan view.
4. The rotary vane for a drain pump according to claim 2, wherein,
the water flow introduction restriction portion is formed in an oblong or oval shape in plan view.
5. The rotary vane for a drain pump according to any one of claims 1 to 4,
the water flow introduction limiting portion has an upper surface that is inclined upward from the front to the rear in the rotation direction.
6. A drain pump, comprising: a housing having a suction pipe provided with a suction port facing downward; a rotary blade housed in the housing; and a motor that rotates the rotary blade,
it is characterized in that the method comprises the steps of,
the rotary vane is a rotary vane for a drain pump according to any one of claims 1 to 5.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-013747 | 2019-01-30 | ||
| JP2019013747A JP7123401B2 (en) | 2019-01-30 | 2019-01-30 | Rotary vane for drainage pump and drainage pump having the same |
| PCT/JP2019/049205 WO2020158215A1 (en) | 2019-01-30 | 2019-12-16 | Rotating blade for drainage pump, and drainage pump having same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113316689A CN113316689A (en) | 2021-08-27 |
| CN113316689B true CN113316689B (en) | 2023-09-08 |
Family
ID=71842083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980088642.2A Active CN113316689B (en) | 2019-01-30 | 2019-12-16 | Rotary vane for drainage pump and drainage pump with same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7123401B2 (en) |
| KR (1) | KR102553971B1 (en) |
| CN (1) | CN113316689B (en) |
| WO (1) | WO2020158215A1 (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1574264A (en) * | 1967-07-04 | 1969-07-11 | ||
| EP1367335A1 (en) * | 2002-05-28 | 2003-12-03 | Team-Electro Componentes, S.A. | Ventilation device with spiral air channelling |
| JP2005226549A (en) * | 2004-02-13 | 2005-08-25 | Daikin Ind Ltd | Drain pump and air conditioner having this drain pump |
| CN101050768A (en) * | 2006-04-03 | 2007-10-10 | 彭树林 | Amphibious high efficiency self suction centrifugal pump |
| AU2010200329A1 (en) * | 2009-02-10 | 2010-08-26 | Robert John Hadaway | A free piston pause phase industrial engine |
| RU2482337C1 (en) * | 2011-11-29 | 2013-05-20 | Общество с ограниченной ответственностью "Вентиляция Экология Безопасность" (ООО "ВЭБ") | Method for increasing pressure and economy of bladed turbomachines |
| CN105782065A (en) * | 2011-08-30 | 2016-07-20 | 株式会社不二工机 | Drain pump |
| CN106989068A (en) * | 2015-11-18 | 2017-07-28 | 株式会社不二工机 | Draining pump |
| CN109257934A (en) * | 2015-08-26 | 2019-01-22 | 伟尔矿物澳大利亚私人有限公司 | Rotary part for slush pump |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3348226B2 (en) * | 1995-11-24 | 2002-11-20 | 株式会社鷺宮製作所 | Drain drain pump |
| JP6091066B2 (en) | 2012-02-29 | 2017-03-08 | 日本電産サンキョー株式会社 | Drain pump |
-
2019
- 2019-01-30 JP JP2019013747A patent/JP7123401B2/en active Active
- 2019-12-16 KR KR1020217018407A patent/KR102553971B1/en active IP Right Grant
- 2019-12-16 WO PCT/JP2019/049205 patent/WO2020158215A1/en active Application Filing
- 2019-12-16 CN CN201980088642.2A patent/CN113316689B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1574264A (en) * | 1967-07-04 | 1969-07-11 | ||
| EP1367335A1 (en) * | 2002-05-28 | 2003-12-03 | Team-Electro Componentes, S.A. | Ventilation device with spiral air channelling |
| JP2005226549A (en) * | 2004-02-13 | 2005-08-25 | Daikin Ind Ltd | Drain pump and air conditioner having this drain pump |
| CN101050768A (en) * | 2006-04-03 | 2007-10-10 | 彭树林 | Amphibious high efficiency self suction centrifugal pump |
| AU2010200329A1 (en) * | 2009-02-10 | 2010-08-26 | Robert John Hadaway | A free piston pause phase industrial engine |
| CN105782065A (en) * | 2011-08-30 | 2016-07-20 | 株式会社不二工机 | Drain pump |
| RU2482337C1 (en) * | 2011-11-29 | 2013-05-20 | Общество с ограниченной ответственностью "Вентиляция Экология Безопасность" (ООО "ВЭБ") | Method for increasing pressure and economy of bladed turbomachines |
| CN109257934A (en) * | 2015-08-26 | 2019-01-22 | 伟尔矿物澳大利亚私人有限公司 | Rotary part for slush pump |
| CN106989068A (en) * | 2015-11-18 | 2017-07-28 | 株式会社不二工机 | Draining pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113316689A (en) | 2021-08-27 |
| WO2020158215A1 (en) | 2020-08-06 |
| KR20210090256A (en) | 2021-07-19 |
| JP7123401B2 (en) | 2022-08-23 |
| JP2020122418A (en) | 2020-08-13 |
| KR102553971B1 (en) | 2023-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0713978B1 (en) | Drainage pump | |
| KR100378147B1 (en) | Drain pump | |
| US7670105B2 (en) | Drain pump, and air conditioner provided therewith | |
| CN113316689B (en) | Rotary vane for drainage pump and drainage pump with same | |
| US11293446B2 (en) | Inline axial flow fan | |
| KR101596902B1 (en) | a suction cover of pump, and a pump having the same | |
| JP6602008B2 (en) | Drainage pump | |
| CN111503046B (en) | Rotary vane for drainage pump and drainage pump with same | |
| WO2021171991A1 (en) | Drainage pump | |
| WO2020241095A1 (en) | Blower | |
| JP3647939B2 (en) | Drainage pump | |
| CA1062545A (en) | Self-priming centrifugal pump | |
| CN111503046A (en) | Rotary blade for drain pump and drain pump with same | |
| JP3996121B2 (en) | Drainage pump | |
| JP7031855B2 (en) | Drainage pump | |
| JP7403792B2 (en) | drain pump | |
| WO2021241341A1 (en) | Drainage pump | |
| WO2019111542A1 (en) | Drainage pump rotating blade and drainage pump having same | |
| CN111801502B (en) | Mounting structure of draining pump | |
| JP2005248732A (en) | Drain pump and air conditioner having the same | |
| KR102552595B1 (en) | Impeller and ventulator including the same | |
| JP2005226549A (en) | Drain pump and air conditioner having this drain pump | |
| JPH09145085A (en) | Drain discharge pump | |
| JP2005030261A (en) | Drain pump | |
| JP2021134733A (en) | Drain pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |