Automatic door opening mechanism

Abstract

The present invention discloses an automatic door opening mechanism, comprising a door opening assembly installed on a dishwasher, the door opening assembly comprising a box body, a wax motor, a door ejection rod and a door ejection rod lever, the wax motor is arranged in the box body, one end of the door ejection rod lever is rotatably fitted in the box body, the other end of the door ejection rod lever is connected to the door ejection rod, the piston rod of the wax motor is connected to the middle part of the door ejection rod lever, the piston rod of the wax motor drives the door ejection rod lever to rotate, and the door ejection rod retracts or extends out of the box body when the door ejection rod lever swings. The present invention provides an automatic door opening mechanism with good drying effect and low power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to an automatic door opening mechanism. Background Art

[0002] At present, the performance of dishwashers mainly includes five indicators: cleaning, power consumption, drying rate, water consumption, and noise. The performance improvement of dishwashers mainly revolves around these five indicators. Power consumption and drying rate are mutually restricted. According to the existing technology, the most direct way to achieve a better drying effect is to increase the final rinse water temperature, but this will increase power consumption. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art and provide an automatic door opening mechanism with good drying effect and low power consumption.

[0004] The technical solution adopted by the present invention is: an automatic door opening mechanism, including a door opening assembly installed on a dishwasher, the door opening assembly including a box body, a wax motor, a door ejection rod and a door ejection rod lever, the wax motor is arranged in the box body, one end of the door ejection rod lever is rotatably fitted in the box body, the other end of the door ejection rod lever is connected to the door ejection rod, the piston rod of the wax motor is connected to the middle part of the door ejection rod lever, the piston rod of the wax motor drives the door ejection rod lever to rotate, and the door ejection rod retracts or extends out of the box body when the door ejection rod lever swings.

[0005] After adopting the above structure, the present invention has the following advantages compared with the prior art: the door opening assembly is installed on the top of the dishwasher body. When the power is on, the door ejection rod extends to eject the dishwasher door. When the power is off, the ejection rod of the door opening assembly retracts to complete one work and prepare for the next ejection. It mainly consists of a box body, a wax motor, a door ejection rod lever, and a door ejection rod. The wax motor is a driving device, which consists of a positive temperature coefficient thermistor (PTC), which is installed on a sealed container filled with solid wax. When the solid wax is heated to a controllable temperature by the powered thermistor, the solid wax melts and expands, thereby driving a spring-loaded piston outward. This piston may drag the load inward or push it outward, depending on the orientation of the container in the wax motor housing and the structure of the spring. When the thermistor is powered off, the liquid wax cools down and the spring returns the piston to its initial position. When the power is on, the piston rod of the wax motor pushes out, driving the door ejection rod to swing, and the door ejection rod drives the door ejection rod to push outward, opening the door a narrow gap during the drying stage so that the hot and humid steam in the machine can be discharged to the outside, which is conducive to achieving better drying effects at lower washing temperatures, thereby reducing energy consumption, with good drying effects and low power consumption.

[0006] Preferably, the door ejector rod is parallel to the piston rod of the wax motor, ensuring that the piston rod of the wax motor can easily drive the movement of the door ejector rod, with high reliability.

[0007] Preferably, a rotating column is provided inside the box body, and one end of the door ejector rod lever is rotatably fitted on the rotating column, with a simple structure.

[0008] Preferably, it further includes a wax motor connecting piece, which includes a first plate, a second plate and a third plate. The first plate, the second plate and the third plate form a "C" shape. The second plate is located below the first plate and above the third plate. Clamping columns are provided on the lower surface of the first plate and the upper surface of the third plate. Grooves are provided on the upper and lower surfaces of the door ejector rod lever. The clamping columns are stuck in the grooves. The second plate is connected to the piston rod of the wax motor. The wax motor connecting piece pushes the door ejector rod lever to swing counterclockwise, pushing the door ejector rod. Due to the lever effect, the pushing distance of the wax motor is amplified. When powered off, the wax motor retracts, and finally pulls the door ejector rod back to its original position. The setting of the wax motor connecting piece facilitates the piston rod of the wax motor to drive the door ejector rod lever to make a rotational motion.

[0009] Preferably, a convex block is provided on the surface of the second plate near the wax motor, and a sliding groove is provided on the convex block. The axis of the sliding groove is on the same straight line as the axis of the piston rod of the wax motor. The width of the sliding groove away from the wax motor is greater than the width of the sliding groove near the wax motor. An annular groove is provided at one end of the piston rod of the wax motor near the door ejector rod lever. The annular groove is located in the part of the sliding groove near the wax motor. The end of the piston rod of the wax motor near the door ejector rod lever is located in the part of the sliding groove away from the wax motor. The sliding groove is open at the top and bottom, which is convenient for installation and disassembly. The cross-section of the sliding groove is "T" shaped. The retractable T-shaped structure of the wax motor head is installed in the T-shaped groove of the wax motor connecting piece, so that the wax motor connecting piece can move back and forth with the wax motor. After the wax motor is powered on, it pushes the wax motor connecting piece forward.

[0010] Preferably, an opening groove is provided at the other end of the door ejector rod lever, and a connecting piece is provided at one end of the door ejector rod. The connecting piece is located in the opening groove. The connecting piece includes a fourth plate, a fifth plate and a sixth plate. The fourth plate, the fifth plate and the sixth plate form a "C" shape. The fifth plate is located below the fourth plate and above the sixth plate. A connecting rod is provided between the fourth plate and the sixth plate. The fifth plate is fixed on the door ejector rod. The connecting rod is rotatably fitted in the opening groove. The connecting piece is rotatably fitted in the opening groove. The connection between the door ejector lever and the door ejector rod is reliable, and the rotational motion of the door ejector lever is better converted into the linear motion of the door ejector rod.

[0011] Preferably, one end of the groove near the wax motor is open, which makes it easy for the column to be stuck in and out of the groove, thereby facilitating installation and disassembly.

[0012] Preferably, a guide groove is provided in the box body, the axis of the guide groove and the axis of the door ejection rod are in the same vertical plane, and the sixth plate is slidably fitted in the guide groove to guide the door ejection rod.

[0013] Preferably, the box body comprises an upper box body and a lower box body, the outer side wall of the lower box body is provided with a plurality of protrusions, the outer side wall of the upper box body is provided with a snap-in plate, the snap-in plate extends out of the bottom of the upper box body, and the snap-in plate is provided with a rectangular slot that is snap-fitted with the protrusions, which facilitates installation and disassembly and has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an exploded schematic diagram of an automatic door opening mechanism of the present invention.

[0015] Figure 2 The present invention is a stereoscopic diagram of an automatic door opening mechanism with a door ejection rod retracted.

[0016] Figure 3 The present invention is a stereoscopic diagram of an automatic door opening mechanism with a door ejection rod extended.

[0017] Figure 4 It is a three-dimensional diagram of an automatic door opening mechanism of the present invention.

[0018] Figure 5 The present invention is a front view of an automatic door opening mechanism installed on a dishwasher.

[0019] Figure 6 It is a stereoscopic diagram of a wax motor connecting piece of an automatic door opening mechanism of the present invention.

[0020] Among them, 1. door opening assembly, 2. box body, 3. wax motor, 4. door ejection rod, 5. door ejection rod lever, 6. rotating column, 7. wax motor connecting piece, 8. groove, 9. first plate, 10. second plate, 11. third plate, 12. clamping column, 13. protrusion, 14. slide groove, 15. annular groove, 16. connecting piece, 17. fourth plate, 18. fifth plate, 19. sixth plate, 20. connecting rod, 21. guide groove, 22. upper box body, 23. lower box body, 24. clamping plate, 25. rectangular clamping groove, 26. protrusion, 27. opening groove. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] As shown in the figure, the present invention provides an automatic door opening mechanism, including a door opening assembly 1 installed on a dishwasher, the door opening assembly 1 includes a box body 2, a wax motor 3, a door ejection rod 4 and a door ejection rod lever 5, the wax motor 3 is arranged in the box body 2, one end of the door ejection rod lever 5 is rotatably fitted in the box body 2, the other end of the door ejection rod lever 5 is connected to the door ejection rod 4, the piston rod of the wax motor 3 is connected to the middle part of the door ejection rod lever 5, the piston rod of the wax motor 3 drives the door ejection rod lever 5 to rotate, and the door ejection rod 4 is at the door top The ejection rod 5 retracts or extends out of the box body 2 when it swings. The advantage of the present invention is that the door opening assembly 1 is installed on the top of the dishwasher body. When the power is on, the door ejection rod 4 extends to eject the dishwasher door. When the power is off, the door ejection rod 4 of the door opening assembly 1 retracts, completing one work and preparing for the next ejection. It mainly consists of a box body 2, a wax motor 3, a door ejection rod 5, and a door ejection rod 4. The wax motor 3 is a driving device, which consists of a positive temperature coefficient thermistor (PTC), which is installed on a sealed container filled with solid wax. When the solid wax is heated to a controllable temperature by the powered thermistor, the solid wax melts and expands, thereby driving a spring-loaded piston outward. This piston may drag the load inward or push it outward, depending on the orientation of the container in the wax motor 3 shell and the structure of the spring. When the thermistor is powered off, the liquid wax cools down, and at the same time the spring returns the piston to its initial position. When the power is turned on, the piston rod of the wax motor 3 is pushed out, driving the door ejection rod 5 to swing. The door ejection rod 5 drives the door ejection rod 4 to push outward, and opens a narrow gap in the door during the drying stage, so that the hot and humid steam in the machine can be discharged to the outside, which is conducive to achieving better drying effect at a lower washing temperature, thereby reducing energy consumption, and achieving good drying effect with low power consumption.

[0023] The door ejection rod 4 is parallel to the piston rod of the wax motor 3, ensuring that the piston rod of the wax motor can easily drive the door ejection rod to move, and the reliability is high.

[0024] A rotating column 6 is provided in the box body 2, and one end of the door ejection lever 5 is rotatably fitted on the rotating column 6, so the structure is simple.

[0025] It also includes a wax motor connecting member 7, and the wax motor connecting member 7 includes a first plate 9, a second plate 10 and a third plate 11. The first plate 9, the second plate 10 and the third plate 11 form a "C" shape. The second plate 10 is located below the first plate 9 and above the third plate 11. Clamping posts 12 are provided on the lower surface of the first plate 9 and the upper surface of the third plate 11. Grooves 8 are provided on both the upper and lower surfaces of the door ejector rod lever 5. The clamping posts 12 are stuck in the grooves 8. The second plate 10 is connected to the piston rod of the wax motor 3. The wax motor connecting member 7 pushes the door ejector rod lever 5 to swing counterclockwise, pushing the door ejector rod 4. Due to the lever effect, the pushing distance of the wax motor 3 is amplified. When powered off, the wax motor 3 retracts, and finally pulls the door ejector rod 4 back to its original position. The wax motor connecting member 7 is provided to facilitate the piston rod of the wax motor 3 to drive the door ejector rod lever 5 to perform a rotational motion.

[0026] A convex block 13 is provided on the surface of the second plate 10 close to the wax motor 3. A chute 14 is provided on the convex block 13. The axis of the chute 14 is on the same straight line as the axis of the piston rod of the wax motor 3. The width of the chute 14 away from the wax motor 3 is greater than the width of the chute 14 close to the wax motor 3. An annular groove 15 is provided at one end of the piston rod of the wax motor 3 close to the door ejector rod lever 5. The annular groove 15 is located in the part of the chute 14 close to the wax motor 3. The end of the piston rod of the wax motor 3 close to the door ejector rod lever 5 is located in the part of the chute 14 away from the wax motor 3. The chute 14 is open at the top and bottom, which is convenient for installation and disassembly. The cross-section of the chute is "T" shaped. The retractable T-shaped structure at the head of the wax motor 3 is installed in the T-shaped groove of the wax motor connecting member 7, enabling the wax motor connecting member 7 to move back and forth with the wax motor 3. After the wax motor 3 is powered on, it pushes the wax motor connecting member 7 forward.

[0027] An opening groove 27 is provided at the other end of the door ejector rod lever 5. A connecting member 16 is provided at one end of the door ejector rod 4. The connecting member 16 is located in the opening groove 27. The connecting member 16 includes a fourth plate 17, a fifth plate 18 and a sixth plate 19. The fourth plate 17, the fifth plate 18 and the sixth plate 19 form a "C" shape. The fifth plate 18 is located below the fourth plate 17 and the fifth plate 10 is located above the sixth plate 19. A connecting rod 20 is provided between the fourth plate 17 and the sixth plate 19. The fifth plate 18 is fixed on the door ejector rod 4. The connecting rod 20 is rotatably fitted in the opening groove 27. The connecting member 16 is rotatably fitted in the opening groove 27. The connection between the door ejector lever 5 and the door ejector rod 4 is reliable, and the rotational motion of the door ejector lever 5 is better converted into the linear motion of the door ejector rod 4.

[0028] One end of the groove 8 close to the wax motor 3 is open, facilitating the clamping post 12 to be stuck in and detached from the groove 8, which is convenient for installation and disassembly.

[0029] A guide groove 21 is provided in the box body 2 , and the axis of the guide groove 21 and the axis of the door ejection rod 4 are in the same vertical plane. The sixth plate 19 is slidably fitted in the guide groove 21 to guide the door ejection rod 4 .

[0030] The box body 2 includes an upper box body 22 and a lower box body 23. The outer wall of the lower box body 23 is provided with a plurality of protrusions 26. The outer wall of the upper box body 22 is provided with a snap-in plate 24. The snap-in plate 24 extends out of the bottom of the upper box body 22. The snap-in plate 24 is provided with a rectangular slot 25 snapped with the protrusion 26, which is convenient for installation and disassembly and has a simple structure.

[0031] Specifically, the principle of the present invention is that the door opening assembly 1 is installed on the top of the dishwasher body. When the power is on, the door ejection rod 4 extends to eject the dishwasher door. When the power is off, the door ejection rod 4 of the door opening assembly 1 retracts to complete one work and prepare for the next ejection. It mainly consists of a box body 2, a wax motor 3, a door ejection rod lever 5, and a door ejection rod 4. The wax motor 3 is a driving device, which consists of a positive temperature coefficient thermistor (PTC), which is installed on a sealed container filled with solid wax. When the solid wax is heated to a controllable temperature by the powered thermistor, the solid wax melts and expands, thereby driving a spring-loaded piston outward. This piston may drag the load inward or push it outward, depending on the orientation of the container in the wax motor 3 shell and the structure of the spring. When the thermistor is powered off, the liquid wax cools down, and at the same time the spring returns the piston to its initial position. When the power is turned on, the piston rod of the wax motor 3 is pushed out, driving the door ejection rod 5 to swing. The door ejection rod 5 drives the door ejection rod 4 to push outward, and opens a narrow gap in the door during the drying stage, so that the hot and humid steam in the machine can be discharged to the outside, which is conducive to achieving better drying effect at a lower washing temperature, thereby reducing energy consumption, and achieving good drying effect with low power consumption.

[0032] The above is an explanation of the preferred embodiments of the present invention, but it cannot be understood as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. An automatic door opening mechanism, comprising a door opening assembly (1) installed on a dishwasher, characterized in that: The door opening assembly (1) includes a box body (2), a wax motor (3), a door ejector rod (4) and a door ejector rod lever (5), and the wax motor (3) is arranged inside the box body (2); One end of the door ejector rod lever (5) is rotatably fitted inside the box body (2), and the other end of the door ejector rod lever (5) is connected to the door ejector rod (4); The piston rod of the wax motor (3) is connected to the middle of the door ejector rod lever (5), and the piston rod of the wax motor (3) drives the door ejector rod lever (5) to rotate; The door ejector rod (4) retracts or extends out of the box body (2) when the door ejector rod lever (5) swings, and the door ejector rod (4) is parallel to the piston rod of the wax motor (3); A rotating column (6) is arranged inside the box body (2), and one end of the door ejector rod lever (5) is rotatably fitted on the rotating column (6); The door opening assembly (1) further includes a wax motor connecting piece (7), and the wax motor connecting piece (7) includes a first plate (9), a second plate (10) and a third plate (11). The first plate (9), the second plate (10) and the third plate (11) form a "C" shape. The second plate (10) is located below the first plate (9) and above the third plate (11). Clamping columns (12) are arranged on the lower surface of the first plate (9) and the upper surface of the third plate (11). Grooves (8) are arranged on the upper and lower surfaces of the door ejector rod lever (5). The clamping columns (12) are stuck in the grooves (8). The second plate (10) is connected to the piston rod of the wax motor (3). The wax motor connecting piece (7) pushes the door ejector rod lever (5) to swing counterclockwise and pushes the door ejector rod (4). Due to the lever effect, the pushing distance of the wax motor (3) is amplified. When powered off, the wax motor (3) retracts to pull the door ejector rod (4) back to its original position; A convex block (13) is arranged on the surface of the second plate (10) close to the wax motor (3), and a sliding groove (14) is arranged on the convex block (13). The axis of the sliding groove (14) is on the same straight line as the axis of the piston rod of the wax motor (3). The width of the sliding groove (14) far from the wax motor (3) is greater than the width of the sliding groove (14) close to the wax motor (3). An annular groove (15) is arranged at one end of the piston rod of the wax motor (3) close to the door ejector rod lever (5). The annular groove (15) is located in the part of the sliding groove (14) close to the wax motor (3). The end of the piston rod of the wax motor (3) close to the door ejector rod lever (5) is located in the part of the sliding groove (14) far from the wax motor (3). The sliding groove (14) is open at the top and bottom; The wax motor (3) is a driving device composed of a positive temperature coefficient thermistor, which is mounted on a sealed container filled with solid wax. When the solid wax is heated by the energized thermistor to a controllable temperature, the solid wax melts and expands, thereby driving a spring-loaded piston outward. When the thermistor is de-energized, the liquid wax cools, and at the same time the spring returns the piston to its initial position. When energized, the piston rod of the wax motor (3) protrudes, driving the door ejection rod lever (5) to swing. The door ejection rod lever (5) drives the door ejection rod (4) to push outward, opening a narrow slit in the door during the drying stage to discharge the humid steam inside the dishwasher to the outside.

2. An automatic door opening mechanism according to claim 1, characterized in that: An opening groove (27) is provided at the other end of the door ejection rod lever (5). A connecting member (16) is provided at one end of the door ejection rod (4). The connecting member (16) is located in the opening groove (27). The connecting member (16) includes a fourth plate (17), a fifth plate (18) and a sixth plate (19). The fourth plate (17), the fifth plate (18) and the sixth plate (19) form a "C" shape. The fifth plate (18) is located below the fourth plate (17) and above the sixth plate (19). A connecting rod (20) is provided between the fourth plate (17) and the sixth plate (19). The fifth plate (18) is fixed on the door ejection rod (4). The connecting rod (20) is rotatably fitted in the opening groove (27).

3. The automatic door opening mechanism according to claim 1, characterized in that: One end of the groove (8) near the wax motor (3) is open.

4. The automatic door opening mechanism according to claim 2, characterized in that: A guiding groove (21) is provided inside the box body (2). The axis of the guiding groove (21) and the axis of the door ejection rod (4) are in the same vertical plane. The sixth plate (19) is slidably fitted in the guiding groove (21).

5. The automatic door opening mechanism according to claim 1, characterized in that: The box body (2) includes an upper box body (22) and a lower box body (23). A plurality of protrusions (26) are provided on the outer side wall of the lower box body (23). A clamping plate (24) is provided on the outer side wall of the upper box body (22). The clamping plate (24) extends out of the bottom of the upper box body (22). A rectangular clamping groove (25) for clamping the protrusion (26) is provided on the clamping plate (24).

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