CN112963512A - Fan blade angle-adjustable air heater and oven with same - Google Patents
Fan blade angle-adjustable air heater and oven with same Download PDFInfo
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- CN112963512A CN112963512A CN202110134330.XA CN202110134330A CN112963512A CN 112963512 A CN112963512 A CN 112963512A CN 202110134330 A CN202110134330 A CN 202110134330A CN 112963512 A CN112963512 A CN 112963512A
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- shaft
- sleeve
- fan blade
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- rotary
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
- F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0629—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements
- A47J37/0641—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements with forced air circulation, e.g. air fryers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0052—Details for air heaters
- F24H9/0073—Arrangement or mounting of means for forcing the circulation of air
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a fan blade angle adjustable air heater and oven, comprising a fan blade shaft, hot air fan blades and a motor which are arranged at intervals along the circumferential direction by taking the fan blade shaft as the center, wherein the inner side end of each hot fan blade is respectively fixed with a rotary seat, each rotary seat is respectively embedded in a rotary mounting opening of a rotary sleeve and can rotate by taking the self central shaft as the center, the rotary sleeve is linked with an output shaft of the motor through a differential component, the fan blade shaft is penetrated and connected in the rotary sleeve, the fan blade shaft can synchronously rotate at the same speed as the output shaft of the motor, a rotary shaft sleeve is in threaded connection with the fan blade shaft, the rotary shaft sleeve and the fan blade shaft form a threaded transmission pair, in addition, the rotary shaft sleeve is linked with each rotary seat through a linkage component, so that when the rotating speeds of the fan blade shaft and the rotary sleeve are different, the rotary shaft sleeve moves along the fan blade shaft, and then each rotary seat is driven to synchronously rotate by the rotary shaft, the adjustment of the angle of each rotary seat is realized, namely the adjustment of the angle of each hot fan blade is realized.
Description
Technical Field
The invention relates to the field of ovens, in particular to an air heater with adjustable fan blade angles and an oven with the air heater.
Background
The back side of the oven inner container is generally provided with an air heater, the air heater rotates to form negative pressure to suck cold air in the inner container into a hot air chamber at the rear side of the inner container, and the cold air entering the hot air chamber is heated by a back heating pipe and then flows back to the inner container again under the action of centrifugal force of the air heater. The flabellum structure of current air heater, like chinese utility model patent that patent number is ZL201821666238.8 (the publication number of granting is CN209569178U) discloses a circulating fan, include wheel hub and enclose the flabellum of establishing in the wheel hub periphery, the flabellum includes be connected with wheel hub and with wheel hub parallel arrangement's locating plate and fan board, this fan board is fixed on the locating plate along its direction of rotation's first side and perpendicular with the locating plate, above-mentioned wheel hub's centre of a circle is located on the extending direction of first side. The angle of the fan plate in the fan blade structure is directly related to the air output of the air heater, when the vertical projection of the fan plate is sin90 degrees, the air output of the air heater is the largest, and the smaller the vertical projection of the fan plate is, the smaller the air output of the air heater is.
Therefore, the fan blade angle of the oven air heater is closely opposite to the air output and the air output angle of the air heater, and the air output angle of the air heater are directly related to the cooking effect of the oven.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide an air heater with adjustable fan blade angle.
The second technical problem to be solved by the present invention is to provide an air heater with fixed and adjustable blade angle and capable of effectively switching and controlling.
The third technical problem to be solved by the present invention is to provide an air heater capable of dissipating heat and cooling a motor in the prior art.
The fourth technical problem to be solved by the present invention is to provide an oven with good cooking effect.
The technical scheme adopted by the invention for solving at least one technical problem is as follows: a fan blade angle adjustable air heater, including the fan blade axle, take the fan blade axle as the centre and set up the hot-blast fan blade and motor circumferentially at intervals, characterized by, also include the rotating shaft sleeve and rotary seat corresponding to above-mentioned hot-blast fan blade one-to-one, the external surface of the above-mentioned fan blade axle has external screw threads, and the internal surface of the above-mentioned rotating shaft sleeve has internal screw threads, the rotating shaft sleeve forms the threaded connection with fan blade axle and forms the screw drive pair, the appearance of every rotary seat is all cylindrical and fixed on the inboard end of the corresponding hot-blast fan blade along its axial direction separately, and, every rotary seat can regard its own central axis as the centre rotation separately, the above-mentioned fan blade axle can rotate with the output shaft of the motor synchronously with the same speed, also include the link assembly used for linking above-mentioned rotary shaft sleeve and every rotary seat and making every rotary seat rotate synchronously, rotary sleeve and differential assembly taking the central symmetry form,
the rotating sleeve is positioned at the center of each hot air fan blade and is axially arranged by taking the fan blade shaft as the center, the fan blade shaft is arranged in the rotating sleeve in a penetrating way, the outer end of the rotating sleeve is sealed to form an outer end wall, the center of the inner surface of the outer end wall is provided with a shaft seat for installing the outer end part of the fan blade shaft, the inner end of the rotating sleeve is sealed, the center hole of the inner end surface is provided with a connecting shaft sleeve extending outwards in the axial direction, the rotating shaft sleeve and the linkage assembly are positioned in the rotating sleeve, the side wall of the outer end of the rotating sleeve is provided with rotating installation ports which are in one-to-one correspondence with the rotating seats at intervals along the circumferential direction, each rotating installation port is a round hole matched with the corresponding rotating seat, each rotating seat is respectively embedded in the corresponding rotating installation port, the inner end of the fan blade shaft passes through the center hole of the inner end surface of the rotating sleeve and is positioned in the connecting shaft sleeve, the fan blade shaft is in clearance fit with the connecting shaft sleeve along the circumferential direction, the differential component is installed on the output shaft of the motor, and the connecting shaft sleeve is linked with the output shaft of the motor through the differential component.
Further, the linkage assembly comprises first hinged seats, linkage rods, second hinged seats and rotary rods which are fixed on the outer peripheral surface of the rotating shaft sleeve at intervals along the circumferential direction, each first hinged seat, each linkage rod, each second hinged seat and each rotary rod are in one-to-one correspondence with the corresponding rotating seat, each rotary rod is fixed on the end surface of the free end of the corresponding rotating seat along the axial direction of each rotating seat, one end of each linkage rod is axially hinged on the first hinged seats, the other end of each linkage rod is fixed with the second hinged seats, and the rotary rods are radially hinged on the corresponding second hinged seats respectively. Therefore, when the rotating shaft sleeve moves along the fan blade shaft, the linkage rods are driven to act, and the linkage rods drive the corresponding rotating rods through the second hinging seats, so that the rotating seats are driven to rotate synchronously, the angles of the rotating seats are adjusted, and the angles of the hot fan blades are adjusted.
Further, the cross section of the rotating sleeve is polygonal, and each rotating installation opening is formed in each side face of the rotating sleeve. Therefore, the influence of the wind resistance formed by the airflow at the position of the rotary sleeve on the air output of the air heater in the rotating process of the air heater can be avoided, the rotary mounting openings are respectively arranged on the side surfaces of the rotary sleeve, the mutual interference in the rotating process of the hot air fan blades can be avoided, and the uniformity of the air output of the air heater can be ensured.
Further, the differential assembly includes a disk-shaped housing, a sun gear, a planetary gear set, a ring gear, and a carrier, an output shaft of the motor is inserted through the housing along a central axis direction of the housing, the ring gear is circumferentially disposed on an inner circumferential surface of the housing, the sun gear and the planetary gear are both disposed in the housing, the sun gear is mounted on the output shaft of the motor, the planetary gears of the planetary gear set are respectively circumferentially disposed around the sun gear and respectively engaged with the sun gear and the ring gear, the carrier has a central through hole that is fitted over the output shaft of the motor with a clearance, a hole edge of the central through hole extends outward in an axial direction to form the connecting shaft sleeve, the connecting shaft sleeve is fitted into a central hole corresponding to the housing, and the carrier has planetary shafts corresponding to the planetary gears of the planetary gear set one by one, each planetary gear is respectively arranged on the corresponding planetary shaft. The rotating speed of the sun gear is the same as the output shaft of the motor, the rotating speed of the planet carrier is smaller than that of the sun gear, and the planet carrier is connected with the rotating sleeve through the connecting shaft sleeve, so that the rotating speed of the rotating sleeve is smaller than that of the fan blade shaft, namely the revolution speed of each rotating seat is smaller than that of the rotating shaft sleeve.
Furthermore, a first clutch is arranged at the inner side end of the fan blade shaft, a second clutch which can be matched with the first clutch is arranged at the free end of the output shaft of the motor, and the first clutch and the second clutch are both positioned in the connecting shaft sleeve. The first clutch and the second clutch are connected when the angle of each hot fan blade needs to be adjusted, the rotating speed of the fan blade shaft is equal to that of the output shaft of the motor, the rotating speed of the rotating sleeve is less than that of the output shaft of the motor, and the rotating shaft sleeve moves along the fan blade shaft under the action of differential speed of the rotating sleeve and the fan blade shaft; when the angle of each hot fan blade is not required to be adjusted, the first clutch and the second clutch are separated, the fan blade shaft does not rotate, the rotating sleeve is linked with the output shaft of the motor through the differential assembly, and each rotating seat rotates by taking the fan blade shaft as the center through the rotating sleeve, so that the rotation of each hot fan blade by taking the output shaft of the motor as the center is realized.
Further, a heat radiation fan is installed on an output shaft of the motor, and the heat radiation fan is adjacent to the motor. Therefore, the motor can be cooled through the cooling fan, and the overhigh temperature of the working environment of the motor is avoided.
Further, the heat dissipation fan comprises a hub and heat dissipation fan blades arranged around the hub, the heat dissipation fan blades comprise a first positioning plate and a first fan plate, the first positioning plate and the first fan plate are connected with the hub and arranged in parallel with the hub, the first fan plate is fixed to a first side edge of the positioning plate in the rotation direction and perpendicular to the first positioning plate, and each first fan plate faces towards the motor. Therefore, the first fan plates face the motor respectively, so that hot air around the motor can be sucked better, and the motor can be better radiated.
Furthermore, each hot fan blade comprises a second positioning plate and a second fan plate which is perpendicular to the second positioning plate, the diameter of each rotating seat is matched with the width of the corresponding second positioning plate, and the rotating rod is arranged opposite to the second fan plate of the hot fan blade where the rotating rod is arranged. By arranging the embedded relation between each rotary seat and the corresponding rotary mounting opening, the acting force transmitted to each rotary rod can better drive each rotary seat to rotate by taking the central shaft of each rotary seat as the center by utilizing the lever principle.
The periphery of the inner side end surface of each rotating seat extends outwards along the circumferential direction to form a limiting peripheral edge which is abutted against the inner opening edge of the corresponding rotating installation opening along the circumferential direction. According to the invention, the rotating speed of the rotating sleeve is smaller than that of the fan blade shaft through the arrangement of the differential assembly, so that each rotating seat has a tendency of moving outwards relative to each rotating installation opening, and each rotating seat can be limited through arranging the limiting circumferential edge, so that each rotating seat is prevented from sliding out of the corresponding rotating installation opening.
The technical scheme adopted for further solving the fourth technical problem is as follows: an oven with the air heater.
Compared with the prior art, the invention has the advantages that: the inner side ends of the hot fan blades are respectively fixed with a rotary seat, each rotary seat is respectively embedded in a rotary mounting opening of a rotary sleeve and can rotate around a self central shaft, the rotary sleeve is linked with an output shaft of the motor through a differential component, a fan blade shaft penetrates through the rotary sleeve, the fan blade shaft can rotate synchronously and at the same speed as the output shaft of the motor, a rotary shaft sleeve is connected to the fan blade shaft in a threaded mode, the rotary shaft sleeve and the fan blade shaft form a threaded transmission pair, and in addition, the rotary shaft sleeve is linked with each rotary seat through a linkage component.
Drawings
FIG. 1 is a schematic structural diagram of an air heater according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an air heater according to an embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a partial exploded view of the heat blower according to the embodiment of the present invention;
FIG. 5 is a schematic partial structure diagram of an air heater according to an embodiment of the present invention;
FIG. 6 is a schematic view of a rotating sleeve according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a planet carrier in an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
An oven comprises an inner container (not shown, and is of a conventional structure), wherein a back plate of the inner container is provided with a mounting hole (not shown), and a fan blade angle-adjustable air heater is mounted on the mounting hole. As shown in fig. 1 to 7, the air heater specifically includes a fan shaft 3, hot air fans 1 disposed around the fan shaft 3 at intervals along the circumferential direction, and a motor 2, wherein the motor 2 is disposed at the rear side of the back plate of the inner container, an output shaft 21 of the motor 2 penetrates through the mounting hole along the front-rear direction, and the fan shaft 3 and the hot air fans 1 are disposed in the inner container.
Further, the air heater further includes a rotating shaft sleeve 4 sleeved on the fan blade shaft 3 and rotating seats 5 corresponding to the hot fan blades 1 one by one, wherein the rotating shaft sleeve 4 is located at the rear side of each hot fan blade 1, the rotating seats 5 are cylindrical in shape and are respectively fixed at the inner side ends of the corresponding hot fan blades 1 along the axial direction thereof, the fan blade shaft 3 can synchronously rotate at the same speed as the output shaft 21 of the motor 2, and each rotating seat 5 can respectively rotate around the central shaft thereof as the center, and the air heater further includes a linkage assembly 7 for linking the rotating shaft sleeve 4 and each rotating seat 5 to enable each rotating seat 5 to synchronously rotate.
The hot fan blades 1 of the present invention each include a second positioning plate 11 and a second fan plate 12 vertically disposed to the second positioning plate 11, and the diameter of each rotating base 5 matches the width of the corresponding second positioning plate 11, wherein the size of the vertical projection of the second fan plate 12 is proportional to the air output of the air heater, i.e., the larger the vertical projection of the second fan plate 12, the larger the air output of the air heater, and the smaller the vertical projection of the second fan plate 12, the smaller the air output of the air heater. As shown in fig. 1 and 2, at this time, the vertical projection of each second fan plate 12 is sin90 °, and the air outlet volume of the hot air blower is the largest.
In this embodiment, an outer thread 30 is provided on an outer circumferential surface of the vane shaft 3, an inner thread 40 is provided on an inner circumferential surface of the rotary sleeve 4, and the rotary sleeve 4 and the vane shaft 3 are screwed to each other through the outer thread 30 and the inner thread 40, so that the rotary sleeve 4 and the vane shaft 3 are screwed to each other.
Further, in this embodiment, the linkage assembly 7 includes first hinge seats 41, linkage rods 71, second hinge seats 72 and rotation rods 73 fixed on the outer circumferential surface of the rotating shaft sleeve 4 at intervals along the circumferential direction, each of the first hinge seats 41, the linkage rods 71, the second hinge seats 72 and the rotation rods 73 respectively corresponds to the rotating seats 5 one by one, wherein each of the rotation rods 73 is respectively fixed on the end surface of the free end of the corresponding rotating seat 5 along the axial direction of each rotating seat 5, one end of each linkage rod 71 is axially hinged on the first hinge seat 41, the other end of each linkage rod is respectively fixed with the second hinge seat 72, and each of the rotation rods 73 is radially hinged on the corresponding second hinge seat 72.
Further, the fan blade assembly comprises a rotating sleeve 6 and a differential assembly 8, the rotating sleeve 6 is located at the center of each hot air fan blade 1 and is axially arranged by taking the fan blade shaft 3 as the center, the inner end of the rotating sleeve 6 is sealed, a connecting shaft sleeve 831 extending outwards in the axial direction is arranged at the central hole of the inner end surface, the rotating shaft sleeve 4 and the linkage assembly 7 are both located in the rotating sleeve 6, the side wall of the outer end of the rotating sleeve 6 is provided with rotating mounting ports 61 corresponding to the rotating seats 5 one by one along the circumferential direction at intervals, each rotating mounting port 61 is a round hole matched with the corresponding rotating seat 5, each rotating seat 5 is respectively embedded in the corresponding rotating mounting port 61, the inner end of the fan blade shaft 3 passes through the central hole of the inner end surface of the rotating sleeve 6 to be located in the connecting shaft sleeve 831, and the fan blade shaft 3 is in clearance fit with the connecting shaft sleeve 831 along the circumferential direction, the differential assembly 8 is mounted on the output shaft 21 of the motor 2, and the connecting sleeve 831 is interlocked with the output shaft 21 of the motor 2 through the differential assembly 8. The rotation of each rotating base 5 by taking the fan blade shaft 3 as a center can be realized through the rotating sleeve 6, meanwhile, the rotation of each rotating base 5 can be better realized by embedding each rotating base 5 in the corresponding rotating installation port 61, the linkage of the rotating sleeve 6 and the output shaft 21 of the motor 2 can be realized through the differential assembly 8 on one hand, and the differential rotation of the rotating sleeve 6 and the rotating shaft sleeve 4 on the other hand can be realized, so that the rotating shaft sleeve 4 moves along the fan blade shaft 3, thereby driving the linkage rod 71 to act, and each linkage rod 71 drives the corresponding rotating rod 73 through the second hinging base 72, thereby driving each rotating base 5 to synchronously rotate, realizing the adjustment of the angle of each rotating base 5, namely realizing the adjustment of the angle of each hot fan blade 1.
Preferably, the cross section of the rotating sleeve 6 has a polygonal shape, and the rotating mounting holes 61 are opened in the side surfaces of the rotating sleeve 6. Therefore, the influence of the wind resistance formed by airflow at the position of the rotary sleeve 6 on the air output of the air heater in the rotating process of the air heater can be avoided, the rotary mounting ports 61 are respectively arranged on the side surfaces of the rotary sleeve 6, the mutual interference of the hot fan blades 1 in the rotating process can be avoided, and the uniformity of the air output of the air heater can be ensured. Specifically, in the present embodiment, the cross section of the rotating sleeve 6 is a regular hexagon, and accordingly, the number of the hot air fan blades 1 in the present embodiment is six. Preferably, the front side end of the rotating sleeve 6 is sealed to form an outer end wall, and a shaft seat 62 for mounting the outer side end of the fan blade shaft 3 is provided at the center of the inner surface of the outer end wall, so that the fan blade shaft 3 can be stably mounted in the rotating sleeve 6.
Further, the differential assembly 8 includes a disk-shaped housing 80, a sun gear 84, a planetary gear set 82, a ring gear 81, and a carrier 83, the output shaft 21 of the motor 2 is inserted into the housing 80 along a central axis direction of the housing 80, the ring gear 81 is circumferentially provided on an inner circumferential surface of the housing 80, the sun gear 84 and the planetary gear teeth 82 are both provided in the housing 80, the sun gear 84 is attached to the output shaft 21 of the motor 2, the planetary gears 821 of the planetary gear set 82 are circumferentially provided around the sun gear 84 and mesh with the sun gear 84 and the ring gear 81, the carrier 83 has a central through hole 830 which is loosely fitted over the output shaft 21 of the motor 2, a hole edge of the central through hole 830 extends in an outward axial direction to form the connecting boss 831, and the connecting boss 831 is fitted into a corresponding central hole of the housing 80, the carrier 83 has planetary shafts 832 corresponding to the planetary gears 821 in the planetary gear set 82, and the planetary gears 821 are respectively mounted on the corresponding planetary shafts 832. In this way, the rotation speed of the sun gear 84 is the same as that of the output shaft 21 of the motor 2, the rotation speed of the carrier 83 is smaller than that of the sun gear 84, and the carrier 83 is connected to the rotary sleeve 6 through the connecting sleeve 831, so that the rotation speed of the rotary sleeve 6 is smaller than that of the fan blade shaft 3, that is, the revolution speed of each rotary holder 5 is smaller than that of the rotary sleeve 4. In the present embodiment, there are three planetary gears 821 in the planetary gear set 82.
In order to control the opening and closing of the angle function of each hot fan blade 1, a first clutch 91 is disposed at the inner end of the blade shaft 3, a second clutch 92 capable of matching with the first clutch 91 is disposed at the free end of the output shaft 21 of the motor 2, and the first clutch 91 and the second clutch 92 are both disposed in the connecting sleeve 831. Therefore, the first clutch 91 and the second clutch 92 can realize connection and separation of the fan blade shaft 3 and the output shaft 21 of the motor 2, when the angle of each hot fan blade 1 needs to be adjusted, the first clutch 91 and the second clutch 92 are connected, the rotating speed of the fan blade shaft 3 is equal to that of the output shaft 21 of the motor 2, and the rotating speed of the rotating sleeve 6 is less than that of the output shaft 21 of the motor 2, so that under the action of differential speed of the rotating sleeve 6 and the fan blade shaft 3, the rotating shaft sleeve 4 moves forwards along the fan blade shaft 3, and further, each linkage rod 71, the second hinged seat 72 and the rotating rod 73 drive each rotating seat to synchronously rotate, and the adjustment of the angle of each rotating seat 5 is realized. When the angle of each hot fan blade 1 is not required to be adjusted, the first clutch 91 and the second clutch 92 are separated, the fan blade shaft 3 does not rotate, the rotating sleeve 6 is linked with the output shaft 21 of the motor 2 through the differential assembly 8, each rotating base 5 rotates along with the rotating sleeve 6, rotation of each hot fan blade 1 with the output shaft 21 of the motor 2 as the center is further realized, in addition, self-locking of the rotating sleeve 4 and the fan blade shaft 3 is realized through threaded connection between the rotating sleeve 4 and the fan blade shaft 3, and the stability of the structure of the linkage assembly 7 and the stability of the installation structure of each rotating base 5 and the rotating sleeve 6 when the fan blade shaft 3 is static and the rotating sleeve 6 rotates are further ensured.
Further, the output shaft 21 of the motor 2 is provided with the heat dissipation fan 10, and the heat dissipation fan 10 is located outside the inner container and adjacent to the motor 2, so that the heat dissipation fan 10 can dissipate heat of the motor 2, and the working environment temperature of the motor 2 is prevented from being too high. Specifically, the heat dissipating fan 10 includes a hub 101 and heat dissipating fan blades 102 surrounding the hub 101, the heat dissipating fan blades 102 include a first positioning plate 1021 connected to the hub 101 and disposed parallel to the hub 101 and a first fan plate 1022, the first fan plate 1022 is fixed to a first side of the positioning plate along a rotation direction thereof and perpendicular to the first positioning plate 1021, and each second fan plate 12 faces the motor 2. In this way, since the second fan plates 12 are respectively faced to the motor 2, hot air around the motor 2 can be sucked in better, and the heat of the motor 2 can be radiated better. In the present embodiment, the output shaft 21 of the motor 2 is sleeved with a seal ring 100, and the seal ring 100 has a cover shape, one end of which is covered on the front surface of the hub 101 and the other end of which is inserted into the mounting hole of the liner, thereby ensuring the sealing performance of the liner.
Claims (10)
1. An air heater with adjustable fan blade angles comprises a fan blade shaft (3), hot fan blades (1) and a motor (2), wherein the hot fan blades (1) and the motor (2) are arranged at intervals along the circumferential direction by taking the fan blade shaft (3) as the center, the air heater is characterized by further comprising a rotating shaft sleeve (4) and rotating seats (5) which correspond to the hot fan blades (1) one by one, external threads (30) are arranged on the outer surface of the fan blade shaft (3), internal threads (40) are arranged on the inner surface of the rotating shaft sleeve (4), the rotating shaft sleeve (4) and the fan blade shaft (3) form threaded connection and form a threaded transmission pair, the rotating seats (5) are cylindrical in appearance and are respectively fixed on the inner side ends of the corresponding hot fan blades (1) along the axial direction of the rotating seats, the rotating seats (5) can respectively rotate by taking the central shafts of the rotating seats as the centers, the fan blade shaft (3) can synchronously rotate with an output shaft (21) of the motor (, also comprises a linkage component (7) for linking the rotary shaft sleeve (4) and each rotary seat (5) to lead each rotary seat (5) to rotate synchronously, a rotary sleeve (6) with a centrosymmetric cross section and a differential component (8),
the rotating sleeve (6) is positioned at the center of each hot fan blade (1) and is axially arranged by taking the fan blade shaft (3) as the center, the fan blade shaft (3) is arranged in the rotating sleeve (6) in a penetrating way, the outer side end of the rotating sleeve (6) is sealed to form an outer end wall, the center of the inner surface of the outer end wall is provided with a shaft seat (62) used for installing the outer side end part of the fan blade shaft (3), the inner side end of the rotating sleeve (6) is also sealed, a connecting shaft sleeve (831) extending outwards in the axial direction is arranged at the center hole of the inner side end surface, the rotating shaft sleeve (4) and the linkage component (7) are both positioned in the rotating sleeve (6), the side wall of the outer side end of the rotating sleeve (6) is provided with rotating mounting ports (61) which are in one-to-one correspondence with the rotating seats (5) at intervals along the circumferential direction, and each rotating mounting port (61) is a round hole which is matched with the corresponding rotating seat (5, the rotating seats (5) are respectively embedded in corresponding rotating installation openings (61), the inner end of the fan blade shaft (3) penetrates through a central hole of the inner end face of the rotating sleeve (6) to be located in the connecting shaft sleeve (831), the fan blade shaft (3) and the connecting shaft sleeve (831) are in clearance fit along the circumferential direction, the differential assembly (8) is installed on the output shaft (21) of the motor (2), and the connecting shaft sleeve (831) is linked with the output shaft (21) of the motor (2) through the differential assembly (8).
2. The air heater according to claim 1, wherein the linkage assembly (7) comprises first hinge seats (41), a linkage rod (71), a second hinge seat (72) and a rotation rod (73) fixed on the outer peripheral surface of the rotary shaft sleeve (4) at intervals along the circumferential direction, each first hinge seat (41), linkage rod (71), second hinge seat (72) and rotation rod (73) respectively correspond to the rotary seats (5) one by one, wherein each rotation rod (73) is respectively fixed on the end surface of the free end of the corresponding rotary seat (5) along the axial direction of each rotary seat (5), one end of each linkage rod (71) is axially hinged on the first hinge seat (41) and the other end is respectively fixed with the second hinge seat (72), and the rotation rods (73) are respectively radially hinged on the corresponding second hinge seats (72).
3. The hot air blower according to claim 1, characterized in that the cross section of the rotary sleeve (6) is polygonal and the rotary mounting openings (61) are respectively provided on the sides of the rotary sleeve (6).
4. The air heater according to claim 1, wherein the differential assembly (8) comprises a disk-shaped housing (80), a sun gear (84), a planetary gear set (82), a ring gear (81) and a planet carrier (83), the output shaft (21) of the motor (2) is inserted into the housing (80) along the central axis of the housing (80), the ring gear (81) is circumferentially disposed on the inner circumferential surface of the housing (80), the sun gear (84) and the planetary gear set (82) are both disposed in the housing (80), the sun gear (84) is mounted on the output shaft (21) of the motor (2) and the planet gears (821) of the planetary gear set (82) are circumferentially disposed around the sun gear (84) and are respectively meshed with the sun gear (84) and the ring gear (81),
the planet carrier (83) is provided with a central through hole (830) which is sleeved on the output shaft (21) of the motor (2) with a gap, the edge of the central through hole (830) extends outwards along the axial direction to form the connecting shaft sleeve (831), the connecting shaft sleeve (831) is embedded in the corresponding central hole of the shell (80), the planet carrier (83) is provided with planet shafts (832) which correspond to the planet gears (821) in the planetary gear set (82) one by one, and the planet gears (821) are respectively installed on the corresponding planet shafts (832).
5. The hot air blower according to any of claims 1 to 4, wherein the inner end of the fan shaft (3) is provided with a first clutch (91), and the free end of the output shaft (21) of the motor (2) is provided with a second clutch (92) which can be matched with the first clutch (91), and the first clutch (91) and the second clutch (92) are both located in the connecting sleeve (831).
6. The air heater according to any of the claims 1 to 4, characterized in that the output shaft (21) of the motor (2) is provided with a heat dissipating fan (10), and the heat dissipating fan (10) is adjacent to the motor (2).
7. The air heater according to claim 6, wherein the heat dissipating fan (10) comprises a hub (101) and heat dissipating fan blades (102) arranged around the periphery of the hub (101), the heat dissipating fan blades (102) comprise a first positioning plate (1021) connected to the hub (101) and arranged parallel to the hub (101) and a first fan plate (1022), the first fan plate (1022) is fixed to a first side of the first positioning plate (1021) along a rotation direction thereof and perpendicular to the first positioning plate (1021), and each first fan plate (1022) faces the motor (2).
8. The hot air blower according to any one of claims 1 to 4, wherein each hot fan blade (1) includes a second positioning plate (11) and a second fan plate (12) disposed perpendicular to the second positioning plate (11), the diameter of each rotary base (5) matches the width of the corresponding second positioning plate (11), and the rotary rod (73) is disposed opposite to the second fan plate (12) of the hot fan blade (1) on which it is disposed.
9. The hot air blower according to any one of claims 1 to 4, wherein the peripheral edge of the inner end surface of each rotary seat (5) extends outward in the circumferential direction to form a limit peripheral edge (51) which abuts against the inner edge of the corresponding rotary mounting port (61) in the circumferential direction.
10. An oven having a hot air blower as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134330.XA CN112963512B (en) | 2021-01-28 | 2021-01-28 | Fan blade angle-adjustable air heater and oven with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134330.XA CN112963512B (en) | 2021-01-28 | 2021-01-28 | Fan blade angle-adjustable air heater and oven with same |
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| Publication Number | Publication Date |
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| CN112963512A true CN112963512A (en) | 2021-06-15 |
| CN112963512B CN112963512B (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110134330.XA Active CN112963512B (en) | 2021-01-28 | 2021-01-28 | Fan blade angle-adjustable air heater and oven with same |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5967135A (en) * | 1998-06-17 | 1999-10-19 | Shariat; Saeed | Cooking device with convection powered fan and water reservoir |
| EP2015610A2 (en) * | 2007-07-09 | 2009-01-14 | Samsung Electronics Co., Ltd. | Convection heating unit and heating cooker having the same |
| CN107191566A (en) * | 2017-07-17 | 2017-09-22 | 李鸿凯 | A kind of adjustment gear-box of the fan head swinging of multi-angle regulation |
| CN109589004A (en) * | 2017-09-30 | 2019-04-09 | 宁波方太厨具有限公司 | A kind of air guide structure and wind-guiding method of electric oven |
| CN111728471A (en) * | 2020-06-30 | 2020-10-02 | 宁波方太厨具有限公司 | Self-adaptive hot air structure and cooking device with same |
| CN112137435A (en) * | 2020-08-28 | 2020-12-29 | 宁波方太厨具有限公司 | Impeller structure for cooking equipment and oven with same |
-
2021
- 2021-01-28 CN CN202110134330.XA patent/CN112963512B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5967135A (en) * | 1998-06-17 | 1999-10-19 | Shariat; Saeed | Cooking device with convection powered fan and water reservoir |
| EP2015610A2 (en) * | 2007-07-09 | 2009-01-14 | Samsung Electronics Co., Ltd. | Convection heating unit and heating cooker having the same |
| CN107191566A (en) * | 2017-07-17 | 2017-09-22 | 李鸿凯 | A kind of adjustment gear-box of the fan head swinging of multi-angle regulation |
| CN109589004A (en) * | 2017-09-30 | 2019-04-09 | 宁波方太厨具有限公司 | A kind of air guide structure and wind-guiding method of electric oven |
| CN111728471A (en) * | 2020-06-30 | 2020-10-02 | 宁波方太厨具有限公司 | Self-adaptive hot air structure and cooking device with same |
| CN112137435A (en) * | 2020-08-28 | 2020-12-29 | 宁波方太厨具有限公司 | Impeller structure for cooking equipment and oven with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112963512B (en) | 2022-03-18 |
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