Shock absorber with energy recovery function, washing machine, and energy recovery control method

Abstract

The present invention relates to a shock absorber with energy recovery function, comprising an outer cylinder, a piston, a piston rod, a shock-absorbing spring, an inner cylinder, a triboelectric element, a clamping element and a control unit. The inner surface of the outer cylinder is provided with a triboelectric layer 1. The outer surface of the inner cylinder is provided with a triboelectric layer 2. The clamping element is installed on the inner cylinder and can clamp or release the piston rod, and the inner cylinder can follow the piston rod to make reciprocating motion. The triboelectric element can generate a current signal by friction with the triboelectric layer 1 and the triboelectric layer 2 when the inner cylinder makes reciprocating motion. The control unit is used to detect the magnitude of the current signal and compare the current signal with a preset value 1 and a preset value 2. The control unit determines the vibration frequency of the washing machine according to the comparison result and controls the clamping element to clamp or release the piston rod. The present invention realizes energy recovery without reducing the vibration reduction effect, and adjusts and improves the vibration reduction effect according to the vibration state.

Description

Technical Field

[0001] The present invention relates to the technical field of energy recovery, and in particular to a shock absorber and a washing machine with energy recovery function, and an energy recovery control method. Background Art

[0002] As one of the most widely used household appliances, the drum washing machine vibrates due to uneven distribution of clothes during operation, which causes the center of gravity of the inner drum to shift, affecting the normal operation and service life of the washing machine. The washing machine needs to be subjected to vibration reduction treatment.

[0003] Traditional vibration reduction schemes for washing machines usually include the following: elastic support vibration reduction scheme, liquid vibration reduction scheme, inertial vibration reduction scheme, and active vibration reduction scheme. However, these vibration reduction schemes only reduce the vibration of the washing machine by consuming vibration energy, and do not recycle the vibration energy of the washing machine. At present, the vibration energy recovery schemes for washing machines mainly include electric energy recovery, kinetic energy recovery, thermal energy recovery, and hydraulic energy recovery. However, kinetic energy recovery requires a more complex recovery device, and its efficiency is low in practical applications; thermal energy recovery requires a more complex heat exchange device, which is less efficient and may cause certain pollution to the environment during the recovery process; hydraulic energy recovery requires a more complex hydraulic device, and has a higher demand for fluids. Therefore, the vibration energy recovery method for washing machines is mainly based on electric energy recovery.

[0004] At present, the methods of recovering the vibration energy of washing machines with electrical energy mainly include inductive vibration power generation, capacitive vibration power generation, and piezoelectric vibration power generation. The inductive vibration power generation method is based on the principle of electromagnetic induction, and uses an inductor to convert the vibration energy of the washing machine into electrical energy. The capacitive vibration power generation method uses the principle that a capacitor generates electrical energy in a vibrating environment to convert the vibration energy of the washing machine into electrical energy. The piezoelectric vibration power generation method is based on the piezoelectric effect, and uses piezoelectric materials to convert the vibration energy of the washing machine into electrical energy. However, although the above schemes of recovering the vibration energy of the washing machine in the form of electrical energy have achieved the recycling of vibration energy, the vibration frequency and vibration amplitude of the washing machine will change over time. When the vibration energy is small, the amplitude and frequency will become smaller, which will result in the above schemes having low energy conversion efficiency and unable to recover a large amount of energy. In addition, the vibration reduction effect of the scheme that only relies on energy recovery to consume vibration energy is lower than that of the traditional vibration reduction scheme, and the vibration reduction effect cannot be effectively guaranteed. Summary of the invention

[0005] Based on this, it is necessary to provide a vibration absorber and washing machine with energy recovery function, and an energy recovery control method to address the technical problems that the current method of recovering vibration energy of washing machines in the form of electrical energy not only has low energy conversion efficiency and cannot recover a large amount of energy, but also has a lower vibration reduction effect than traditional vibration reduction schemes, and the vibration reduction effect cannot be effectively guaranteed.

[0006] The present invention provides a vibration absorber with energy recovery function, which is used in a washing machine and comprises:

[0007] An outer cylinder body of a cylindrical structure;

[0008] A piston coaxially disposed in the outer cylinder; and

[0009] A piston rod, one end of which extends into the outer cylinder body and is coaxially fixed to the piston, and can reciprocate in the outer cylinder body;

[0010] The inner surface of the outer cylinder is provided with a triboelectric layer 1; the shock absorber further comprises:

[0011] The inner cylinder body of the cylindrical structure is coaxially arranged in the outer cylinder body and a gap is left between the outer cylinder body, the outer surface of the inner cylinder body is provided with a friction electrification layer 2, the inner cylinder body has a sealed cavity and the sealed cavity is filled with hydraulic oil; the piston is coaxially arranged in the sealed cavity and cooperates with the inner wall of the inner cylinder body in a sliding seal; the piston rod extends into the sealed cavity and cooperates with the inner cylinder body in a sliding seal, and can drive the piston to reciprocate in the sealed cavity;

[0012] A damping spring fixed in the outer cylinder and fixed at one end of the inner cylinder;

[0013] A clamping member, which is mounted on the inner cylinder body and can clamp or loosen the piston rod. When the clamping member clamps the piston rod, the inner cylinder body reciprocates with the piston rod;

[0014] A triboelectric element, which is installed in the gap between the inner cylinder and the outer cylinder, and can generate a current signal by friction with the first triboelectric layer and the second triboelectric layer when the inner cylinder makes a reciprocating motion;

[0015] A control unit is used to detect the size of the current signal and compare the current signal with a preset value one and a preset value two. The preset value one is greater than the preset value two. The control unit determines the size of the vibration frequency of the washing machine based on the comparison result, thereby controlling the clamping member to clamp or release the piston rod; when the current signal is greater than the preset value one, it is determined that the vibration frequency of the washing machine is greater than a preset frequency value one, and the control unit controls the clamping member to release the piston rod; when the current signal is less than the preset value two, it is determined that the vibration frequency of the washing machine is less than a preset frequency value two, and the preset frequency value two is less than the preset frequency value one, and the control unit controls the clamping member to clamp the piston rod.

[0016] In a preferred embodiment of the present invention, the friction electrification element comprises:

[0017] A plurality of spherical mass blocks are rotatably mounted on the outer surface of the inner cylinder body, and a friction-electrifying layer three is arranged on the surface of the spherical mass blocks. The friction-electrifying layer three can generate current by friction with the friction-electrifying layer one and the friction-electrifying layer two.

[0018] In a preferred embodiment of the present invention, a plurality of mounting sleeves are provided on the outer surface of the inner cylinder body, an annular mounting groove is formed on the outside of each mounting sleeve, a plurality of mounting rings are installed in the annular mounting groove, a plurality of grooves are provided on the side close to each other of any two adjacent mounting rings, and the plurality of grooves on any two adjacent mounting rings are arranged one by one, and the corresponding two grooves cooperate to form a hemispherical groove; the surface of the mounting ring and the groove wall of the hemispherical groove are both attached with triboelectric material to form the second triboelectric layer; the plurality of spherical mass blocks are respectively rotatably fitted in the hemispherical groove.

[0019] In a preferred embodiment of the present invention, the piston is provided with a first assembly hole and a second assembly hole; the shock absorber further comprises:

[0020] an extension valve installed in the first assembly hole; and

[0021] A flow valve is installed in the second assembly hole.

[0022] In a preferred embodiment of the present invention, the vibration damper further comprises:

[0023] Two sealing members, both of which are installed in the inner cylinder body and the sealing cavity is formed between the two sealing members;

[0024] and / or

[0025] The sealing member comprises:

[0026] An oil seal seat is installed in the inner cylinder body and seals with the inner cylinder body, and the oil seal seat is provided with a step hole coaxially arranged with the inner cylinder body; the piston rod passes through the step hole and its outer diameter matches the small diameter of the step hole;

[0027] An oil seal ring is installed in the large diameter hole of the step hole and is slidably matched with the piston rod for sealing; and

[0028] The inner guide sleeve is installed in the large diameter hole of the step hole and is located on the outside of the oil seal ring. The inner guide sleeve and the piston rod are slidably matched and sealed.

[0029] In a preferred embodiment of the present invention, the clamping member comprises:

[0030] A fixing ring coaxially mounted on the other end of the inner cylinder;

[0031] A plurality of electromagnets, the plurality of electromagnets are circumferentially distributed in the fixing ring and the plurality of electromagnets are mounted on the mounting ring, and each electromagnet is electrically connected to the control unit;

[0032] A plurality of clamping blocks, each of which is arranged in one-to-one correspondence with a plurality of electromagnets, and a clamping block close to the electromagnet is provided with an iron sheet that can be attracted by the electromagnet and is provided with at least one sliding hole;

[0033] A plurality of guide rods, at least one guide rod is disposed between the corresponding electromagnets and the clamping blocks, one end of the at least one guide rod is fixedly connected to the electromagnet, and the other end of the at least one guide rod extends into the at least one sliding hole and is slidably connected to the clamping block; and

[0034] A plurality of return springs are respectively sleeved on a plurality of guide rods and two ends of the return springs are respectively connected with the corresponding electromagnets and clamping blocks.

[0035] In a preferred embodiment of the present invention, the vibration damper further comprises:

[0036] An energy storage unit, whose input end is electrically connected to the first and second triboelectric layers and is used to store the electrical energy generated by friction between the triboelectric element and the first and second triboelectric layers, and whose output end is electrically connected to the multiple electromagnets of the clamping element.

[0037] In a preferred embodiment of the present invention, the energy storage unit comprises:

[0038] A rectifying and voltage-stabilizing circuit, the input end of which is electrically connected to the triboelectric layer 1 and the triboelectric element through a wire; and

[0039] The energy storage unit is electrically connected to the output end of the rectifying and stabilizing circuit.

[0040] The present invention also provides a washing machine, which comprises the aforementioned shock absorber with energy recovery function.

[0041] The present invention further proposes an energy recovery control method, which uses the aforementioned shock absorber with energy recovery function, and the energy recovery control method comprises the following steps:

[0042] Preset a preset value 1, a preset value 2, a preset frequency value 1, and a preset frequency value 2, wherein the preset value 1 is greater than the preset value 2, and the preset frequency value 1 is greater than the preset frequency value 2;

[0043] Detecting the magnitude of the current signal and comparing the current signal with the preset value 1 and the preset value 2, and judging the magnitude of the vibration frequency of the washing machine according to the comparison result, so as to control the clamping member to clamp or release the piston rod;

[0044] When the current signal is greater than the preset value 1, it is determined that the vibration frequency of the washing machine is greater than the preset frequency value 1, and the clamping member is controlled to release the piston rod, so that the piston rod drives the piston to reciprocate in the sealing chamber, and the vibration energy is absorbed by the hydraulic damping of the hydraulic oil;

[0045] When the current signal is less than the preset value two, it is determined that the vibration frequency of the washing machine is less than the preset frequency value two, and the clamping member is controlled to clamp the piston rod. The piston rod drives the inner cylinder body to reciprocate in the outer cylinder body, and the vibration energy is converted into electrical energy through the friction between the friction electrifying member and the friction electrifying layer one and the friction electrifying layer two.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. The vibration absorber with energy recovery function proposed by the present invention determines the vibration frequency of the washing machine by setting an inner cylinder body, a friction electrifying member and a clamping member, and detecting the magnitude of the current signal generated by friction electricity; when the vibration amplitude of the washing machine is small and less than the preset frequency value 2, the clamping member is controlled to clamp the piston rod, and the piston rod and the inner cylinder body have no relative motion, and the piston rod drives the inner cylinder body to do reciprocating motion. At this time, the vibration energy is absorbed by the friction electrification between the friction electrifying member and the friction electrifying layer 1 and the friction electrifying layer 2. At this time, the vibration damping spring plays a buffering effect, and the vibration energy is continuously recovered. At the same time, it can greatly reduce the vibration transmitted to the box by the shock absorber, and improve the vibration reduction effect of the shock absorber; when the vibration amplitude of the washing machine is large and greater than the preset frequency value, if only relying on frictional electricity to absorb the vibration energy, the vibration reduction effect of the entire device will be not very ideal, so at this time, the clamping member is controlled to loosen the piston rod, and the piston rod and the inner cylinder body produce relative movement. At this time, most of the vibration energy is absorbed by the hydraulic damping effect in the inner cylinder body, and due to the effect of force, the inner cylinder body produces a slight relative movement relative to the outer cylinder body, thereby absorbing part of the vibration energy through frictional electricity. The shock absorber of the present invention is not affected by the irregular vibration of the washing machine, and can continuously recover vibration energy in the form of electrical energy, greatly improving the energy recovery efficiency. At the same time, the present invention can adjust and improve the vibration reduction effect according to the vibration state of the washing machine without reducing the vibration reduction effect of the original shock absorber.

[0048] 2. The present invention utilizes the principle of frictional electricity generation to achieve the purpose of recovering vibration energy in the form of electrical energy. The frictional nano-power generation technology can convert tiny mechanical movements into electrical energy to achieve efficient energy conversion. The use of frictional nano-power generation technology for vibration energy recovery can greatly improve the energy recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic diagram of the structure of a shock absorber with energy recovery function proposed in an embodiment of the present invention;

[0050] Figure 2 for Figure 1 Schematic diagram of some structures;

[0051] Figure 3 for Figure 1 A schematic diagram of the structure of the middle installation sleeve;

[0052] Figure 4 for Figure 3 A cross-sectional view of

[0053] Figure 5 for Figure 1 A schematic diagram of the structure of the middle clamping member;

[0054] Figure 6This is a schematic diagram of an energy recovery control principle of a shock absorber with energy recovery function proposed in an embodiment of the present invention.

[0055] Figure numerals: 1, outer cylinder; 1-1, triboelectric layer 1; 1-2, mounting seat; 1-3, outer guide sleeve; 1-4, outer end cover; 1-5, lower lifting ear; 1-7, line through hole 1; 2, piston; 3, piston rod; 3-1, upper lifting ear; 4, damping spring; 5, inner cylinder; 5-1 hemispherical groove; 5-2, mounting sleeve; 5-3, boss; 5-4, fixing cover; 5-5, mounting ring; 5-6, inner end cover; 5-7, positioning ring; 5 -8, circuit through hole 2; 5-9, circuit through hole 3; 6, clamping part; 6-1, fixing ring; 6-2 electromagnet; 6-3, clamping block; 6-4, guide rod; 6-5, reset spring; 6-6, iron sheet; 7, friction electrification part; 7-1, spherical mass block; 8, energy storage unit; 9, control unit; 10, extension valve; 11, circulation valve; 12, sealing part; 12-1, oil seal seat; 12-2 oil seal ring; 12-3, inner guide sleeve. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] This embodiment proposes a vibration absorber with energy recovery function, which is installed on the bottom or chassis of the washing machine to absorb and alleviate the vibration of the washing machine during washing and the noise generated during operation. It can reduce the impact force of the washing machine on the ground when running at high speed, and at the same time reduce the noise generated, thereby improving the operating efficiency and service life of the washing machine. Figure 1 , Figure 1 The schematic diagram of the structure of the shock absorber with energy recovery function provided by the preferred embodiment of the present invention. The shock absorber with energy recovery function of this embodiment mainly includes an outer cylinder 1, an inner cylinder 5, a friction electrification member 7, a shock absorbing spring 4, two sealing members 12, a piston 2, a piston rod 3, a clamping member 6, an energy storage unit 8 and a control unit 9, etc.

[0058] The outer cylinder body 1 is a cylindrical structure, and a mounting seat 1-2 of an annular structure is fixed in one end of the outer cylinder body 1, and an outer guide sleeve 1-3 is installed in the mounting seat 1-2, and an outer end cover 1-4 is also installed on the outside of the end in a sealed manner. The other end of the outer cylinder body 1 is fixedly connected with a lower hanging ear 1-5, and the shock absorber of this embodiment is connected to the box body of the washing machine through the lower hanging ear 1-5. The inner surface of the outer cylinder body 1 is provided with a triboelectric layer 1-1, and the triboelectric layer 1-1 is a cylindrical structure. The triboelectric layer 1-1 is made of triboelectric nanomaterials, such as multilayer graphene, zinc oxide, silicon, etc., which is a nanomaterial that generates electrical energy through friction energy. The special properties of nanomaterials are used to realize the conversion process of mechanical energy into electrical energy. The working principle of triboelectric nanomaterials is to use the principle that friction and movement between nanoparticles can generate static charge, thereby realizing the conversion between mechanical energy and electrical energy. In this embodiment, the outer cylinder body 1 can be made of cast iron, aluminum alloy or steel, or other materials. The material of the outer cylinder body 1 must ensure that it has high strength and hardness and is easy to process and manufacture.

[0059] The inner cylinder 5 is also a cylindrical structure, and the inner cylinder 5 is coaxially arranged in the outer cylinder 1 with a gap between the inner cylinder 5 and the outer cylinder 1. In this embodiment, the inner cylinder 5 is located inside the friction electrification layer 1-1 of the cylindrical structure. Figure 2 , the inner cylinder body 5 is equipped with an inner end cover 5-6 at one end near the lower lifting ear 1-5. In this embodiment, the inner cylinder body 5 can also be made of cast iron, aluminum alloy or steel, or other materials. The material of the inner cylinder body 5 must ensure that it has high strength and hardness and is easy to process and manufacture. The outer fixing set of the inner cylinder body 5 has two installation sleeves 5-2, please combine Figure 3 , Figure 4 , one end of each mounting sleeve 5-2 is integrally formed with a convex shoulder 5-3, and each mounting sleeve 5-2 is also fixedly mounted with a fixed cover 5-4, and the fixed cover 5-4 cooperates with the convex shoulder 5-3 to form an annular mounting groove. A plurality of mounting rings 5-5 are mounted in the annular mounting groove, and a plurality of grooves are provided on the side close to each other of any two adjacent mounting rings 5-5, and the plurality of grooves on any two adjacent mounting rings 5-5 are arranged one by one, and the corresponding two grooves cooperate to form a hemispherical groove 5-1. The surface of the mounting ring 5-5 and the groove wall of the hemispherical groove 5-1 are both attached with triboelectric material to form a second triboelectric layer, and the triboelectric material here also adopts triboelectric nano-electricity generation material.

[0060] The friction electrification member 7 includes a plurality of spherical mass blocks 7-1, which are respectively rotatably mounted in a plurality of hemispherical grooves 5-1 outside the inner cylinder body 5. The size of the hemispherical grooves 5-1 is larger than the size of the spherical mass blocks 7-1, so as to ensure that the spherical mass blocks 7-1 will not fall off. The plurality of spherical mass blocks 7-1 are in frictional contact with the friction electrification layer 1-1 on the inner wall of the outer cylinder body 1. A friction electrification material is attached to the surface of the spherical mass block 7-1, thereby forming a friction electrification layer 3 on its surface. When the spherical mass block 7-1 rotates in the hemispherical grooves 5-1, the friction electrification layer 3 can generate current by friction with the friction electrification layer 1-1 and the friction electrification layer 2, and this current can be collected and stored, thereby realizing energy recovery. The friction electrification material on the surface of the spherical mass block 7-1 also adopts a friction nano-electricity generation material. When the spherical mass block 7-1 rotates in the hemispherical groove 5-1, and relative movement occurs between the triboelectric layer three, the triboelectric layer one 1-1, and the triboelectric layer two, an electrostatic field will be generated at the interface between the nanomaterials, causing the movement of charged nanoparticles, thereby causing charge drift and change in potential difference, and ultimately converting mechanical energy into electrical energy. The generated electrical energy can be used for DC electrical appliances in the washing machine, such as display screens and sensors, and can also be stored.

[0061] The damping spring 4 is located in the outer cylinder 1 and on the side of the inner cylinder 5 close to the lower hanging ear 1-5. The two ends of the damping spring are respectively welded to the lower hanging ear 1-5 and the inner end cover. The elastic coefficient of the damping spring 4 needs to be adjusted according to the specific use environment and needs to ensure a stable damping effect. The damping spring 4 can be made of some steel materials, such as high-strength spring steel or alloy steel, to ensure its durability and stability. The damping spring 4 transmits or absorbs the vibration energy of the shock absorber through its elastic deformation, reduces the amplitude and frequency of the vibration, and improves the stability and reliability of the shock absorber.

[0062] Two seals 12 are installed in the inner cylinder 5, one of which is installed at a position of the inner cylinder 5 away from the port of one end of the inner end cover, and the other seal 12 is installed in the inner cylinder 5 near one end of the inner end cover, and a positioning ring 5-7 for positioning the seal 12 is provided on the inner wall of the inner cylinder 5, and a closed sealing cavity is formed between the two seals 12 in the inner cylinder 5, and the sealing cavity is filled with hydraulic oil. In this embodiment, the seal 12 includes an oil seal seat 12-1, an oil seal ring 12-2 and an inner guide sleeve 12-3. The oil seal seat 12-1 is installed on the inner wall of the inner cylinder 5 and is sealed with the inner cylinder 5, the oil seal seat 12-1 near the inner end cover abuts against the positioning ring 5-7 of the inner cylinder 5, and the oil seal seat 12-1 is provided with a step hole coaxially arranged with the inner cylinder 5. The oil seal ring 12-2 and the inner guide sleeve 12-3 are both installed in the large diameter hole of the step hole of the oil seal seat 12-1, and the inner guide sleeve 12-3 is located outside the oil seal ring 12-2.

[0063] The piston 2 is located in the sealed cavity of the inner cylinder body 5 and is sealed and slidably matched with the inner wall of the inner cylinder body 5. The piston 2 can reciprocate in the sealed cavity. The piston 2 is provided with an assembly hole 1 and an assembly hole 2, and an extension valve 10 and a flow valve 11 are installed in the assembly hole 1 and the assembly hole 2 respectively. The extension valve 10 and the flow valve 11 are both components for controlling the flow of the hydraulic system, and their main function is to control the flow direction and flow size of the hydraulic oil in the sealed cavity.

[0064] One end of the piston rod 3 passes through the outer end cover 1-4, the outer guide sleeve 1-3, the seal 12, the piston 2, and the seal 12 in sequence. The piston rod 3 is fixedly connected to the piston 2 and slidably cooperates with the outer end cover 1-4, the outer guide sleeve 1-3, and the seal 12. The other end of the piston rod 3 is connected with an upper hanging ear 3-1, and the shock absorber of this embodiment is connected to the outer barrel of the washing machine through the upper hanging ear 3-1. In this way, when the washing machine drum is working, the vibration is transmitted to the piston rod 3 through the upper hanging ear 3-1, thereby driving the piston rod 3 to reciprocate, and the piston rod 3 drives the piston 2 to reciprocate in the inner cylinder 5, and the vibration energy is absorbed by the flow and resistance of the hydraulic oil in the sealed cavity, thereby reducing the dynamic load on the washing machine and improving the safety and reliability of the washing machine.

[0065] The clamping member 6 is installed on the inner cylinder body 5 and is used to clamp or loosen the piston rod 3. When the clamping member 6 clamps the piston rod 3, the inner cylinder body 5 can reciprocate with the piston rod 3, so that the inner cylinder body 5 will drive the multiple spherical mass blocks 7-1 to rotate in the hemispherical groove 5-1. The spherical mass blocks 7-1 are constantly in friction contact with the triboelectric layer 1-1 and the triboelectric layer 2 to generate current. In this embodiment, please combine Figure 5The clamping member 6 includes a fixing ring 6-1, a plurality of electromagnets 6-2, a plurality of clamping blocks 6-3, a plurality of guide rods 6-4 and a plurality of return springs 6-5. The fixing ring 6-1 is coaxially mounted on the end face of the inner cylinder body 5 away from the inner end cover, and the fixing ring 6-1 is coaxial with the piston rod 3. The plurality of electromagnets 6-2 are evenly distributed in the circumferential direction within the fixing ring 6-1, and the plurality of electromagnets 6-2 are all mounted on the inner surface of the mounting ring 5-5. The electromagnets 6-2 will generate magnetism when energized, and the magnetism disappears when not energized. The plurality of clamping blocks 6-3 are respectively arranged in one-to-one correspondence with the plurality of electromagnets 6-2, and the plurality of clamping blocks 6-3 are evenly distributed on the outer circumference of the piston rod 3. The clamping block 6-3 is provided with an iron sheet 6-6 that can be attracted to the electromagnet 6-2 on one side close to the electromagnet 6-2, and two sliding holes are also provided on this side. Two guide rods 6-4 are arranged between the corresponding clamping blocks 6-3 and the electromagnets 6-2. One end of the two guide rods 6-4 is fixedly connected to the electromagnets 6-2 and the other ends of the two guide rods 6-4 are respectively extended into the two sliding holes. The guide rods 6-4 are connected to the clamping blocks 6-3 by sliding cooperation. A reset spring 6-5 is set on the outside of each guide rod 6-4 and the two ends of the reset spring 6-5 are respectively connected to the electromagnets 6-2 and the clamping blocks 6-3. In this way, when multiple electromagnets 6-2 are powered on, the electromagnets 6-2 will attract the clamping blocks 6-3 to move in the direction of the electromagnets 6-2 and compress the reset springs 6-5. At this time, the clamping member 6 releases the piston rod 3; when the multiple electromagnets 6-2 are powered off and lose their magnetism, the iron sheet separates from the electromagnets 6-2, and the multiple clamping blocks 6-3 are reset under the action of the reset springs 6-5 and move in the direction of the piston rod 3 to clamp the piston rod 3. At this time, the clamping member 6 clamps the piston rod 3. In this embodiment, in order to ensure that the clamping block 6-3 can better clamp the piston rod 3, the inner surface of the clamping block 6-3 is set to an arc surface to increase the contact area between the clamping block 6-3 and the piston rod 3. At the same time, the inner surface of the clamping block 6-3 is anti-slip treated to improve the clamping effect.

[0066] The energy storage unit 8 is used to store the electric energy generated by the friction between the spherical mass block 7-1 and the triboelectric layer 1-1 and the triboelectric layer 2. In this embodiment, the energy storage unit 8 includes a rectifier and voltage stabilizing circuit and an energy storage unit. The input end of the rectifier and voltage stabilizing circuit is electrically connected to the triboelectric layer 1-1 and the triboelectric layer 2 through a wire, and the output end of the rectifier and voltage stabilizing circuit is connected to the input end of the energy storage unit through a wire. Since the vibration frequency and amplitude of the washing machine are not constant, the current is also unstable and cannot be directly used. The unstable AC current is converted into a stable DC current through the rectifier and voltage stabilizing circuit, and the energy storage unit is used to store the electric energy. The energy storage unit can be a battery. The electric energy collected by the energy storage unit can be used for DC electrical appliances in the washing machine, such as display screens and sensors; at the same time, the energy storage unit is connected to multiple electromagnets 6-2 of the clamping member 6 through a line to power the electromagnets 6-2.

[0067] It should be noted that, in order to facilitate the connection between the energy storage unit 8 and the friction electrifying layer 1-1 and the friction electrifying layer 2, a circuit through hole 1-7 is opened on the lower hanging ear 1-5, a circuit through hole 2 5-8 is opened through the inner end cover, and a circuit through hole 3 5-9 is opened in the inner cylinder body 5. The wire connected to the friction electrifying layer 1-1 is directly led out from the circuit through hole 1-7, and the wire connected to the friction electrifying layer 2 is led out from the circuit through hole 3 5-9, the circuit through hole 2 5-8 and then from the circuit through hole 1-7.

[0068] The control unit 9 can pre-set a preset value 1, a preset value 2, a preset frequency value 1, and a preset frequency value 2, wherein the preset value 1 is greater than the preset value 2, and the preset frequency value 1 is greater than the preset frequency value 2. The control unit 9 detects the magnitude of the current signal transmitted to the input end of the energy storage unit and compares the detected current signal with the preset value 1 and the preset value 2, and determines the magnitude of the vibration frequency of the washing machine according to the comparison result, thereby controlling the on-off of the connection line between the multiple electromagnets 6-2 and the energy storage unit, thereby loosening or clamping the piston rod 3. When the detected current signal is greater than the preset value 1, it is determined that the vibration frequency of the washing machine is greater than the preset frequency value 1, and the control unit 9 controls the connection of the line between the multiple electromagnets 6-2 and the energy storage unit. When the detected current signal is less than the preset value 2, it is determined that the vibration frequency of the washing machine is less than the preset frequency value 2, and the control unit 9 controls the disconnection of the line between the multiple electromagnets 6-2 and the energy storage unit. The control unit 9 of this embodiment can adopt the control unit of the washing machine.

[0069] This embodiment determines the vibration frequency of the washing machine by detecting the magnitude of the current signal generated by friction between the friction electrification element 7 and the first and second friction electrification layers, and further controls the vibration reduction effect of the vibration absorber in real time. When the vibration amplitude of the washing machine is small and less than the preset frequency value 2, the clamping member 6 is controlled to clamp the piston rod 3, and the piston rod 3 and the inner cylinder body 5 have no relative movement. At this time, the vibration energy is absorbed by the frictional charging between the friction electrification member 7 and the friction electrification layer 1 and the friction electrification layer 2. At this time, the vibration damping spring 4 plays a buffering effect. While recovering the vibration energy, it can greatly reduce the vibration transmitted to the washing machine body by the vibration damper, thereby improving the vibration damping effect of the vibration damper; when the vibration amplitude of the washing machine is large and greater than the preset frequency value 1, if only relying on frictional charging to absorb the vibration energy, the vibration damping effect of the entire device will be not very ideal, so at this time, the clamping member 6 is controlled to loosen the piston rod 3, and the piston rod 3 and the inner cylinder body 5 have relative movement. At this time, most of the vibration energy is absorbed by the hydraulic damping effect in the inner cylinder body 5, and due to the effect of the force, the inner cylinder body 5 has a slight relative movement relative to the outer cylinder body 1, thereby absorbing part of the vibration energy through frictional charging. At this time, the vibration damping spring 4 can also play a buffering effect. While recovering the vibration energy, it can greatly reduce the vibration transmitted to the box by the vibration damper, thereby improving the vibration damping effect of the vibration damper.

[0070] Combination Figure 6 , the energy recovery control principle of this embodiment is as follows:

[0071] The control unit 9 obtains the magnitude of the current signal delivered to the input end of the energy storage unit in real time and compares the current signal delivered to the input end of the energy storage unit with the preset value 1 and the preset value 2;

[0072] When the current signal transmitted to the input end of the energy storage unit is greater than a preset value one, it is determined that the vibration frequency of the washing machine is greater than a preset frequency value one, and the control unit 9 controls multiple electromagnets 6-2 to be connected to the energy storage unit. The electromagnets 6-2 are energized to generate magnetic attraction to the iron sheet 6-6, and multiple clamping blocks 6-3 release the piston rod 3. When the inner drum of the washing machine vibrates, the piston rod 3 is driven to reciprocate, and the piston rod 3 drives the piston 2 and the inner cylinder body 5 to produce relative motion, and the vibration energy is mainly absorbed by the hydraulic damping effect in the inner cylinder body 5; at this time, the reciprocating motion of the inner cylinder body 5 relative to the outer cylinder body 1 is weak, and the friction speed between the spherical mass block 7-1 and the friction electrification layer 1-1 and the friction electrification layer 2 is small, and the current signal transmitted to the input end of the energy storage unit is reduced;

[0073] When the current signal transmitted to the input end of the energy storage unit is less than the preset value two, it is judged that the vibration frequency generated by the washing machine drum is less than the preset frequency value two, and the control unit 9 controls the multiple electromagnets 6-2 to disconnect from the energy storage unit. At this time, the multiple electromagnets 6-2 lose their magnetism, and the multiple clamping blocks 6-3 all approach the piston rod 3 and clamp the piston rod 3 together. When the inner drum of the washing machine vibrates, it will drive the piston rod 3 to reciprocate, and the piston rod 3 will drive the inner cylinder body 5 to reciprocate in the outer cylinder body 1. At this time, the reciprocating motion of the inner cylinder body 5 relative to the outer cylinder body 1 is enhanced, and the movement of the inner cylinder body 5 will drive the multiple spherical mass blocks 7-1 to rotate in the multiple hemispherical grooves 5-1 respectively, and the friction speed between the spherical mass block 7-1 and the friction electrification layer 1-1 and the friction electrification layer 2 increases, so that the current signal transmitted to the input end of the energy storage unit increases; such a cycle is carried out to realize the energy recovery control of the shock absorber;

[0074] When the current signal transmitted to the input end of the energy storage unit is 0, the vibration amplitude of the washing machine is 0, and the washing machine stops working at this time, and the plurality of clamping blocks 6 - 3 keep clamping the piston rod 3 .

[0075] The present invention realizes energy recovery without reducing the vibration reduction effect of the original vibration absorber, and can also adjust and improve the vibration reduction effect according to the vibration state of the washing machine.

[0076] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A vibration absorber with energy recovery function, used in a washing machine, comprising: An outer cylinder body of a cylindrical structure; A piston coaxially disposed in the outer cylinder; as well as A piston rod, one end of which extends into the outer cylinder body and is coaxially fixed to the piston, and can reciprocate in the outer cylinder body; Characterized in that the inner surface of the outer cylinder is provided with a triboelectric layer 1; the shock absorber further comprises: The inner cylinder body of the cylindrical structure is coaxially arranged in the outer cylinder body and a gap is left between the outer cylinder body, the outer surface of the inner cylinder body is provided with a friction electrification layer 2, the inner cylinder body has a sealed cavity and the sealed cavity is filled with hydraulic oil; the piston is coaxially arranged in the sealed cavity and cooperates with the inner wall of the inner cylinder body in a sliding seal; the piston rod extends into the sealed cavity and cooperates with the inner cylinder body in a sliding seal, and can drive the piston to reciprocate in the sealed cavity; A damping spring fixed in the outer cylinder and fixed at one end of the inner cylinder; A clamping member, which is mounted on the inner cylinder body and can clamp or loosen the piston rod. When the clamping member clamps the piston rod, the inner cylinder body reciprocates with the piston rod; A triboelectric element, which is installed in the gap between the inner cylinder and the outer cylinder, and can generate a current signal by friction with the first triboelectric layer and the second triboelectric layer when the inner cylinder makes a reciprocating motion; A control unit is used to detect the size of the current signal and compare the current signal with a preset value one and a preset value two. The preset value one is greater than the preset value two. The control unit determines the size of the vibration frequency of the washing machine based on the comparison result, thereby controlling the clamping member to clamp or release the piston rod; when the current signal is greater than the preset value one, it is determined that the vibration frequency of the washing machine is greater than a preset frequency value one, and the control unit controls the clamping member to release the piston rod; when the current signal is less than the preset value two, it is determined that the vibration frequency of the washing machine is less than a preset frequency value two, and the preset frequency value two is less than the preset frequency value one, and the control unit controls the clamping member to clamp the piston rod.

2. The shock absorber with energy recovery function according to claim 1, characterized in that: The friction electrification element comprises: A plurality of spherical mass blocks are rotatably mounted on the outer surface of the inner cylinder body, and a friction-electrifying layer three is arranged on the surface of the spherical mass blocks. The friction-electrifying layer three can generate current by friction with the friction-electrifying layer one and the friction-electrifying layer two.

3. The shock absorber with energy recovery function according to claim 2, characterized in that: The outer surface of the inner cylinder body is provided with a plurality of mounting sleeves, each mounting sleeve is formed with an annular mounting groove on the outside, and a plurality of mounting rings are installed in the annular mounting groove, and a plurality of grooves are opened on the side close to each other of any two adjacent mounting rings, and the plurality of grooves on any two adjacent mounting rings are arranged one by one, and the corresponding two grooves cooperate to form a hemispherical groove; the surface of the mounting ring and the groove wall of the hemispherical groove are both attached with triboelectric material to form the second triboelectric layer; the plurality of spherical mass blocks are respectively rotatably fitted in the hemispherical groove.

4. The shock absorber with energy recovery function according to claim 1, characterized in that: The piston is provided with a first assembly hole and a second assembly hole; the shock absorber further comprises: an extension valve installed in the first assembly hole; and A flow valve is installed in the second assembly hole.

5. The shock absorber with energy recovery function according to claim 1, characterized in that: The vibration absorber further comprises: Two seals, both of which are installed in the inner cylinder body and form the sealing cavity between the two seals; the piston rod passes through the two seals and cooperates with the two seals in a sliding and sealing manner; and / or The sealing member comprises: An oil seal seat is installed in the inner cylinder body and seals with the inner cylinder body, and the oil seal seat is provided with a step hole coaxially arranged with the inner cylinder body; the piston rod passes through the step hole and its outer diameter matches the small diameter of the step hole; An oil seal ring is installed in the large diameter hole of the step hole and is slidably matched with the piston rod for sealing; and The inner guide sleeve is installed in the large diameter hole of the step hole and is located on the outside of the oil seal ring. The inner guide sleeve and the piston rod are slidably matched and sealed.

6. The shock absorber with energy recovery function according to claim 1, characterized in that: The clamping member comprises: A fixing ring coaxially mounted on the other end of the inner cylinder; A plurality of electromagnets, the plurality of electromagnets are circumferentially distributed in the fixing ring and the plurality of electromagnets are mounted on the mounting ring, and each electromagnet is electrically connected to the control unit; A plurality of clamping blocks, each of which is arranged in one-to-one correspondence with a plurality of electromagnets, and a clamping block close to the electromagnet is provided with an iron sheet that can be attracted by the electromagnet and is provided with at least one sliding hole; A plurality of guide rods, at least one guide rod is disposed between the corresponding electromagnets and the clamping blocks, one end of the at least one guide rod is fixedly connected to the electromagnet, and the other end of the at least one guide rod extends into the at least one sliding hole and is slidably connected to the clamping block; and A plurality of return springs are respectively sleeved on a plurality of guide rods and two ends of the return springs are respectively connected with the corresponding electromagnets and clamping blocks.

7. The shock absorber with energy recovery function according to claim 6, characterized in that: The vibration absorber further comprises: An energy storage unit, whose input end is electrically connected to the first and second triboelectric layers and is used to store the electrical energy generated by friction between the triboelectric element and the first and second triboelectric layers, and whose output end is electrically connected to the multiple electromagnets of the clamping element.

8. The shock absorber with energy recovery function according to claim 7, characterized in that: The energy storage unit comprises: A rectifying and voltage-stabilizing circuit, the input end of which is electrically connected to the triboelectric layer 1 and the triboelectric element through a wire; and The energy storage unit is electrically connected to the output end of the rectifying and stabilizing circuit.

9. A washing machine, characterized in that: It comprises the shock absorber with energy recovery function as claimed in any one of claims 1 to 8.

10. An energy recovery control method, characterized in that: It adopts the shock absorber with energy recovery function as claimed in any one of claims 1 to 8, and the energy recovery control method comprises the following steps: Preset a preset value 1, a preset value 2, a preset frequency value 1, and a preset frequency value 2, wherein the preset value 1 is greater than the preset value 2, and the preset frequency value 1 is greater than the preset frequency value 2; Detecting the magnitude of the current signal and comparing the current signal with the preset value 1 and the preset value 2, and judging the magnitude of the vibration frequency of the washing machine according to the comparison result, so as to control the clamping member to clamp or release the piston rod; When the current signal is greater than the preset value 1, it is determined that the vibration frequency of the washing machine is greater than the preset frequency value 1, and the clamping member is controlled to release the piston rod, so that the piston rod drives the piston to reciprocate in the sealing chamber, and the vibration energy is absorbed by the hydraulic damping of the hydraulic oil; When the current signal is less than the preset value two, it is determined that the vibration frequency of the washing machine is less than the preset frequency value two, and the clamping member is controlled to clamp the piston rod. The piston rod drives the inner cylinder body to reciprocate in the outer cylinder body, and the vibration energy is converted into electrical energy through the friction between the friction electrifying member and the friction electrifying layer one and the friction electrifying layer two.

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