Variable air inlet for dishwasher to improve flow field

Abstract

The variable air inlet for a dishwasher capable of improving the flow field comprises a shell and a movable component; the movable component comprises an adjustment unit, a telescopic rod, a transmission turntable, a transmission gear and a driving device; the outer circumferential surface of the shell is evenly provided with transmission gear mounting holes; the transmission turntable is a pair, respectively arranged on both sides of the transmission gear; the side of the transmission turntable close to the transmission gear is provided with a circumferential toothed structure, and the side of the transmission turntable away from the transmission gear is provided with a transmission groove; the telescopic rod is in two groups, respectively arranged on both sides of the transmission turntable; the telescopic rod is provided with a boss, the inner circumferential surface of the shell is provided with a telescopic rod mounting hole, and the end of the telescopic rod away from the transmission turntable is hinged with the adjustment unit. The variable air inlet for a dishwasher capable of improving the flow field of the present invention allows the air inlet to be changed through a specific structure, so as to reduce the resistance drop when hot air passes through, improve the flow condition of hot air inside the dishwasher, reduce the fluid pressure loss, make the hot air drying more sufficient, and improve the drying effect.

Description

Technical Field

[0001] The invention relates to the technical field of dishwasher parts, and in particular to a variable air inlet for a dishwasher capable of improving a flow field. Background Art

[0002] A dishwasher is a device that automatically washes and dries tableware such as bowls, chopsticks, plates, dishes, knives, forks, etc. There are many drying methods for dishwashers on the market, among which hot air drying is the most common drying method. After washing the tableware, the tableware is dried by passing hot air into the dishwasher. However, when the hot air enters the internal cavity of the dishwasher, it will directly hit the tableware, causing fluid pressure loss, and in the suddenly expanded pipe (the hot air enters the internal cavity of the dishwasher from the channel, and the internal cavity of the dishwasher can be regarded as a special pipe), there is often a large resistance drop when the hot air passes through, which further causes fluid pressure loss, resulting in poor flow of hot air in the pipe (internal cavity of the dishwasher), so that this drying method often has the problem of insufficient drying, resulting in water droplets remaining on the surface of the tableware after drying. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a variable air inlet for a dishwasher capable of improving the flow field. The variable air inlet for a dishwasher capable of improving the flow field of the present invention adopts a specific structure so that the flow condition of the hot air inside the dishwasher can be improved by adjusting the state of the air inlet, thereby reducing the fluid pressure loss, making the hot air drying more sufficient and improving the drying effect.

[0004] The technical solution of the present invention:

[0005] A variable air inlet for a dishwasher capable of improving a flow field comprises a housing and a movable component; the movable component comprises an adjustment unit, a telescopic rod, a transmission turntable, a transmission gear and a driving device;

[0006] The outer circumferential surface of the housing is evenly provided with transmission gear mounting holes, each of which cooperates with a rotating shaft of a transmission gear to form a cylindrical substructure; and at least one of the transmission gears is in transmission connection with the driving device;

[0007] The transmission turntable is a pair, which is respectively arranged on both sides of the transmission gear; a toothed structure distributed in a circumferential shape is arranged on one side of the transmission turntable close to the transmission gear, and the toothed structure is meshed with the transmission gear;

[0008] The adjustment unit comprises a frame, a movable link and a connecting ear piece; the movable link is a pair, located inside the frame and symmetrically arranged; the middle part of the movable link is hinged to the frame; the two ends of the movable link are respectively connected to the lower part of a telescopic rod through a connecting ear piece; the telescopic rod is provided with a connecting boss, and the connecting boss is provided with a strip groove; one end of the connecting ear piece is hinged to the movable link, and the other end is connected to the connecting boss through a pin shaft, and the pin shaft can move in the strip groove as the connecting ear piece moves;

[0009] A transmission groove is provided on the side of the transmission turntable away from the transmission gear, and a transmission convex head is correspondingly provided on the telescopic rod, and the transmission convex head is located in the transmission groove; a telescopic rod mounting hole is provided on the housing, and the telescopic rod cooperates with the telescopic rod mounting hole to form a sliding pair; when the transmission turntable rotates, the transmission convex head moves along the transmission groove, so that the telescopic rod moves along the telescopic rod mounting hole to extend or retract;

[0010] There are multiple adjustment units, which are arranged in sequence in a ring shape; two adjacent adjustment units share a telescopic rod; when the transmission turntable rotates, one of the transmission turntables drives the telescopic rod to extend, and the other transmission turntable drives the telescopic rod to retract, so as to adjust the air inlet;

[0011] A temperature sensor is provided on the air outlet side of the shell; during the adjustment process, the temperature sensor detects the temperature in real time, the controller extracts the maximum value from the value fed back by the temperature sensor, and then controls the air inlet to adjust to the position when the temperature sensor obtains the maximum value.

[0012] Compared with the prior art, the variable air inlet for the dishwasher capable of improving the flow field of the present invention is provided with a movable component and a temperature sensor. According to the real-time detection data of the temperature sensor, the controller controls the driving device to drive the transmission gear connected thereto to rotate. The transmission gear drives a pair of transmission turntables to rotate in opposite directions through the toothed structure meshing therewith. The transmission turntables drive two groups of telescopic rods to move in opposite directions through the transmission grooves and the transmission protrusions. One of the transmission turntables drives the telescopic rod to extend, and the other transmission turntable drives the telescopic rod to retract, so as to adjust the air inlet. During the adjustment process, the controller extracts the maximum value in the feedback data of the temperature sensor and adjusts the air inlet so that the data of the temperature sensor is maintained at the maximum value, thereby maximizing the drying effect of the dishwasher. At this time, the flow of hot air in the internal cavity of the dishwasher is improved, and the change in the flow direction reduces the pressure loss caused by the hot air hitting the dishes. The air inlet is conical and the opening faces the inside of the dishwasher, so that there is a certain buffer when the hot air passes through the air inlet (the channel does not suddenly become larger), reducing the resistance drop when the hot air enters the internal cavity of the dishwasher, and further reducing the pressure loss.

[0013] As an optimization, in the aforementioned variable air inlet for the dishwasher capable of improving the flow field, during the adjustment process, if the controller detects that an inflection point occurs in the value fed back by the temperature sensor, the inflection point value is determined as the maximum value.

[0014] As an optimization, in the aforementioned variable air inlet for dishwashers that can improve the flow field, the shell is in an overall ring shape; the shell includes a first shell, a second shell and a third shell; the first shell and the second shell are symmetrically arranged, and the third shell is arranged between the first shell and the second shell; the third shell is provided with a step, and the step is used to place the transmission turntable; the first shell and the second shell are connected by A bolts, the first shell and the third shell are connected by A screws, and the second shell and the third shell are connected by B screws. With this specific structure, the shell is divided into three parts, each of which has a relatively simple structure, which is convenient for production and processing, and is also relatively simple to assemble, saving time and effort.

[0015] As an optimization, in the aforementioned variable air inlet for dishwashers capable of improving flow field, a bearing is provided between the transmission gear and the transmission gear mounting hole. With this structure, a bearing is provided between the transmission gear and the transmission gear mounting hole, which can make the transmission gear rotate more smoothly, and the bearing can play a certain supporting role for the transmission gear, preventing the transmission gear from shaking up and down during operation, thereby improving the reliability of the overall device.

[0016] As an optimization, in the aforementioned variable air inlet for dishwashers capable of improving flow field, the two side surfaces of the step close to the transmission turntable are provided with spherical grooves evenly distributed in the circumferential direction, and the spherical grooves are provided with A balls; the third housing is evenly provided with B balls at the position where it cooperates with the circumference of the transmission turntable. With this structure, the A balls are used to contact the transmission turntable instead of the step, and the B balls are used to contact the transmission turntable instead of the third housing, so that the friction force on the transmission turntable when rotating is reduced, the rotation is smoother, and the friction loss of parts during long-term use is reduced, thereby increasing the service life of the device.

[0017] As an optimization, in the aforementioned variable air inlet for dishwashers capable of improving flow field, the main body of the transmission protrusion is cylindrical, and the head of the transmission protrusion is hemispherical. With this structure, when the device is running, the friction between the transmission protrusion and the transmission turntable is less, the device runs more smoothly, and the friction loss of parts during long-term use is reduced, thereby increasing the service life of the device.

[0018] As an optimization, in the aforementioned variable air inlet for dishwashers capable of improving flow field, a spiral heating tube is provided between the shell and the telescopic rod. With this structure, a spiral heating tube is provided between the shell and the telescopic rod, which can further heat the hot air passing through, thereby improving the drying effect.

[0019] As an optimization, in the aforementioned variable air inlet for a dishwasher capable of improving the flow field, the driving device is a servo motor.

[0020] As an optimization, in the aforementioned variable air inlet for a dishwasher capable of improving the flow field, the shell is made of PP material. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a variable air inlet for a dishwasher that can improve the flow field. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of a variable air inlet for a dishwasher that can improve the flow field. Figure 2 ;

[0023] Figure 3 It is a schematic diagram of the internal structure of a variable air inlet for a dishwasher that can improve the flow field;

[0024] Figure 4 It is a schematic diagram of the structure of the shell;

[0025] Figure 5 is a schematic diagram of the structure of the third shell;

[0026] Figure 6 It is a schematic diagram of the structure in which a spiral heating tube is installed in the second shell;

[0027] Figure 7 It is a schematic diagram of the structure of the telescopic rod;

[0028] Figure 8 It is a structural schematic diagram of the combination of the telescopic rod and the adjustment unit;

[0029] Fig. 9 It is a structural schematic diagram of a combination of a movable connecting rod and a connecting ear piece.

[0030] Markings in the accompanying drawings: 1-shell, 11-transmission gear mounting hole, 12-telescopic rod mounting hole, 13-first shell, 14-second shell, 15-third shell, 151-step; 2-movable component, 21-adjusting unit, 211-frame, 212-movable connecting rod, 213-connecting ear, 214-connecting boss, 215-strip groove, 22-telescopic rod, 221-transmission convex head, 23-transmission turntable, 231-tooth structure, 232-transmission groove, 24-transmission gear, 25-driving device; 3-A bolt; 4-A screw; 5-B screw; 6-A ball; 7-B ball; 8-spiral heating tube; 9-temperature sensor. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but is not intended to be limiting of the present invention. In the following embodiments, all that is not described in detail is conventional technical means or technical common sense in the art.

[0032] Example (see Figure 1-9 ):

[0033] A variable air inlet for a dishwasher capable of improving a flow field comprises a housing 1 and a movable assembly 2; the movable assembly 2 comprises an adjustment unit 21, a telescopic rod 22, a transmission turntable 23, a transmission gear 24 and a driving device 25; transmission gear mounting holes 11 are evenly arranged on the outer circumference of the housing 1, each transmission gear mounting hole 11 cooperates with a rotating shaft of a transmission gear 24 to form a cylindrical substructure; and at least one of the transmission gears 24 is transmission-connected to the driving device 25; the transmission turntable 23 is a pair, respectively arranged on both sides of the transmission gear 24; the transmission turntable 23 is provided with a toothed structure 2 distributed in a circumferential shape on one side close to the transmission gear 24 31, the toothed structure 231 is meshed with the transmission gear 24; the adjustment unit 21 includes a frame 211, a movable link 212 and a connecting ear piece 213; the movable link 212 is a pair, located inside the frame 211, and symmetrically arranged; the middle part of the movable link 212 is hinged to the frame 211; the two ends of the movable link 212 are respectively connected to the lower part of a telescopic rod 22 through a connecting ear piece 213; the telescopic rod 22 is provided with a connecting boss 214, and the connecting boss 214 is provided with a strip groove 215; one end of the connecting ear piece 213 is hinged to the movable link 212, and the other end is connected to the The connecting boss 214 is connected by a pin (in the embodiment, a bolt is used as the pin, and an untightened nut is used to prevent the bolt from falling), and the pin can move in the strip groove 215 as the connecting ear piece 213 moves; a transmission groove 232 is provided on the side of the transmission turntable 23 away from the transmission gear 24, and a transmission convex head 221 is correspondingly provided on the telescopic rod 22, and the transmission convex head 221 is located in the transmission groove 232; a telescopic rod mounting hole 12 is provided on the housing 1, and the telescopic rod 22 cooperates with the telescopic rod mounting hole 12 to form a sliding pair; when the transmission turntable 23 rotates, the transmission convex head 221 Move along the transmission groove 232, so that the telescopic rod 22 moves along the telescopic rod mounting hole 12 to extend or retract; there are multiple adjustment units 21, which are arranged in sequence into a ring; two adjacent adjustment units 21 share the telescopic rod 22; when the transmission turntable 23 rotates, one of the transmission turntables 23 drives the telescopic rod 22 to extend, and the other transmission turntable 23 drives the telescopic rod 22 to retract, so as to adjust the air inlet; a temperature sensor 9 is provided on the air outlet side of the shell 1; during the adjustment process, the temperature sensor 9 detects the temperature in real time, and the controller extracts the maximum value from the value fed back by the temperature sensor 9, and then controls the air inlet to be adjusted to the position when the temperature sensor 9 obtains the maximum value.

[0034] In this embodiment, during the adjustment process, if the controller detects that an inflection point occurs in the value fed back by the temperature sensor 9, the inflection point value is determined as the maximum value.

[0035] In this embodiment, the housing 1 is in an annular shape as a whole; the housing 1 includes a first housing 13, a second housing 14 and a third housing 15; the first housing 13 and the second housing 14 are symmetrically arranged, and the third housing 15 is arranged between the first housing 13 and the second housing 14; a step 151 is arranged on the third housing 15, and the step 151 is used to place the transmission turntable 23; the first housing 13 and the second housing 14 are connected by A bolts 3, the first housing 13 and the third housing 15 are connected by A screws 4, and the second housing 14 and the third housing 15 are connected by B screws 5. This housing 1 composed of three parts is simple in structure and has fewer processing steps during production and manufacturing, which saves time and effort; and it can be assembled by bolts and screws, which is convenient and quick.

[0036] In this embodiment, a bearing is provided between the transmission gear 24 and the transmission gear mounting hole 11. The provision of the bearing can make the transmission gear 24 rotate more smoothly, and the bearing can provide a certain support to the transmission gear 24 to prevent the transmission gear 24 from shaking up and down during operation.

[0037] In this embodiment, the step 151 is provided with spherical grooves evenly distributed in the circumferential direction on both sides close to the transmission turntable 23, and the spherical grooves are provided with A balls 6; the third housing 15 is evenly provided with B balls 7 at the places where it cooperates with the circumference of the transmission turntable 23. The provision of the balls changes the surface contact between the transmission turntable 13 and the housing 1 into point contact, making the operation smoother.

[0038] In this embodiment, the main body of the transmission protrusion 221 is cylindrical, and the head of the transmission protrusion 221 is hemispherical.

[0039] In this embodiment, a spiral heating tube 8 is provided between the housing 1 and the telescopic rod 22 to further heat the hot air passing through the air inlet.

[0040] In this embodiment, the driving device 25 is a servo motor.

[0041] In this embodiment, the shell 1 is made of PP material.

[0042] When the dishwasher with improved flow field of this embodiment is working with a variable air inlet, the controller controls the driving device 25 (servo motor) to operate according to the internal temperature and pressure data of the dishwasher detected by the temperature sensor 9 on the housing 1. The driving device 25 drives the transmission gear 24 connected thereto to rotate. The transmission gear 24 drives a pair of transmission turntables 23 to rotate in opposite directions through the toothed structure 231 on the transmission turntable 23 meshing therewith. The transmission turntable 23 drives the two groups of telescopic rods 22 to move in opposite directions through the transmission groove 232 provided thereon and the transmission convex head 221 on the telescopic rod 22. One of the transmission turntables 23 drives the telescopic rod 22 to extend, and the other transmission turntable 23 drives the telescopic rod 22 to retract, so as to adjust the air inlet. During the adjustment process, when the controller detects that the value fed back by the temperature sensor 9 has an inflection point, the value of the inflection point is determined as the maximum value, and the air inlet is automatically adjusted to maintain the value fed back by the temperature sensor 9 at the maximum value.

[0043] The above general description of the invention involved in this application and the description of its specific implementation methods should not be understood as limiting the technical solutions of the invention. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description and / or specific implementation methods (including examples) without violating the constituent elements of the invention involved, to form other technical solutions within the scope of protection of this application.

Claims

1. A variable air inlet for a dishwasher capable of improving the flow field, characterized in that: It comprises a housing (1) and a movable assembly (2); the movable assembly (2) comprises an adjustment unit (21), a telescopic rod (22), a transmission turntable (23), a transmission gear (24) and a driving device (25); Transmission gear mounting holes (11) are evenly arranged on the outer circumferential surface of the housing (1), and each transmission gear mounting hole (11) cooperates with the rotating shaft of a transmission gear (24) to form a cylindrical substructure; and at least one of the transmission gears (24) is in transmission connection with the driving device (25); The transmission rotating disc (23) is a pair, which is respectively arranged on both sides of the transmission gear (24); a toothed structure (231) distributed in a circumferential shape is arranged on one side of the transmission rotating disc (23) close to the transmission gear (24), and the toothed structure (231) is meshed with the transmission gear (24); The adjustment unit (21) comprises a frame (211), a movable connecting rod (212) and a connecting ear piece (213); the movable connecting rod (212) is a pair, located inside the frame (211) and symmetrically arranged; the middle part of the movable connecting rod (212) is hinged to the frame (211); the two ends of the movable connecting rod (212) are respectively connected to the lower part of a telescopic rod (22) through a connecting ear piece (213); the telescopic rod (22) is provided with a connecting boss (214), and the connecting boss (214) is provided with a strip groove (215); one end of the connecting ear piece (213) is hinged to the movable connecting rod (212), and the other end is connected to the connecting boss (214) through a pin shaft, and the pin shaft can move in the strip groove (215) as the connecting ear piece (213) moves; A transmission groove (232) is provided on a side of the transmission turntable (23) away from the transmission gear (24); a transmission convex head (221) is correspondingly provided on the telescopic rod (22); the transmission convex head (221) is located in the transmission groove (232); a telescopic rod mounting hole (12) is provided on the housing (1); the telescopic rod (22) cooperates with the telescopic rod mounting hole (12) to form a sliding pair; when the transmission turntable (23) rotates, the transmission convex head (221) moves along the transmission groove (232), so that the telescopic rod (22) moves along the telescopic rod mounting hole (12) to extend or retract; The regulating units (21) are provided in plurality and arranged in sequence in a ring shape; two adjacent regulating units (21) share a telescopic rod (22); when the transmission turntable (23) rotates, one of the transmission turntables (23) drives the telescopic rod (22) to extend, and the other transmission turntable (23) drives the telescopic rod (22) to retract, thereby regulating the air inlet; A temperature sensor (9) is provided on the air outlet side of the housing (1); during the adjustment process, the temperature sensor (9) detects the temperature in real time, the controller extracts the maximum value from the value fed back by the temperature sensor (9), and then controls the air inlet to adjust to the position when the temperature sensor (9) obtains the maximum value.

2. The variable air inlet for a dishwasher capable of improving the flow field according to claim 1, characterized in that: During the adjustment process, if the controller detects that a value fed back by the temperature sensor (9) has an inflection point, the value of the inflection point is determined as the maximum value.

3. The variable air inlet for a dishwasher capable of improving the flow field according to claim 2, characterized in that: The shell (1) is in an annular shape as a whole; the shell (1) comprises a first shell (13), a second shell (14) and a third shell (15); the first shell (13) and the second shell (14) are symmetrically arranged, and the third shell (15) is arranged between the first shell (13) and the second shell (14); a step (151) is provided on the third shell (15), and the step (151) is used to place the transmission turntable (23); the first shell (13) and the second shell (14) are connected by an A bolt (3), the first shell (13) and the third shell (15) are connected by an A screw (4), and the second shell (14) and the third shell (15) are connected by a B screw (5).

4. The variable air inlet for a dishwasher capable of improving the flow field according to claim 3, characterized in that: A bearing is provided between the transmission gear (24) and the transmission gear mounting hole (11).

5. The variable air inlet for a dishwasher capable of improving the flow field according to claim 4, characterized in that: The step (151) is provided with spherical grooves evenly distributed in the circumferential direction on both sides close to the transmission turntable (23), and the spherical grooves are provided with A balls (6); and the third housing (15) is evenly provided with B balls (7) at the locations where the third housing (15) cooperates with the circumferential surface of the transmission turntable (23).

6. The variable air inlet for a dishwasher capable of improving the flow field according to claim 5, characterized in that: The main body of the transmission cam (221) is cylindrical, and the head of the transmission cam (221) is hemispherical.

7. According to the variable air inlet for a dishwasher capable of improving the flow field as claimed in claim 6, a spiral heating tube (8) is provided between the housing (1) and the telescopic rod (22).

8. The variable air inlet for a dishwasher capable of improving the flow field according to any one of claims 1 to 7, characterized in that: The driving device (25) is a servo motor.

9. The variable air inlet for a dishwasher capable of improving the flow field according to claim 8, characterized in that: The shell (1) is made of PP material.

Images