CN109560719B - Magnetostrictive excitation device, container and household appliance - Google Patents
Magnetostrictive excitation device, container and household appliance Download PDFInfo
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Abstract
The invention discloses a magnetostrictive excitation device, a container and a household appliance. The magnetostrictive excitation device includes: a magnetostrictive excitation source for generating an alternating magnetic field; a permanent magnet unit disposed adjacent to the magnetostrictive excitation source. Thus, the magnetostrictive excitation device has at least one of the following advantages: the composite magnetic field with the overlapped longitudinal alternating magnetic field and the transverse magnetic field can be generated, the direction, the amplitude and the frequency of the generated composite magnetic field can be controlled, the magnetostrictive effect can be simultaneously generated in the longitudinal direction and the transverse direction of the magnetostrictive material in the composite magnetic field, and the overall magnetostrictive effect of the magnetostrictive material is greatly improved.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a magnetostrictive excitation device, a container and a household appliance.
Background
The magnetostrictive material is a novel functional material developed in recent years, has the excellent characteristics of large magnetostrictive strain, high magneto-mechanical coupling coefficient, high response speed, high energy density and the like, and has wide application prospects in the high-technology fields of sonar underwater acoustic transducer technology, electroacoustic transducer technology, micro-displacement driving, vibration reduction and prevention, noise reduction and prevention systems, robots, automation technology and the like. The magnetostrictive material can generate certain form change in a magnetic field, the length is elongated or shortened, the magnetic field disappears, and the magnetostrictive material returns to the original shape, and the effect is called magnetostrictive effect. An important factor determining the magnetostrictive effect is the magnetostrictive excitation device, the magnetostrictive effect is related to the direction and the strength of the magnetic field generated by the magnetostrictive excitation device, and the magnetostrictive effect of the magnetostrictive material can be controlled by controlling the direction, the amplitude and the frequency of the magnetic field generated by the magnetostrictive excitation device based on the relationship between the magnetostrictive material and the magnetostrictive excitation device.
However, improvements in current magnetostrictive actuation devices, containers, and household appliances remain.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
the inventor finds that the magnetic field generated by the current magnetostrictive excitation device can not enable the magnetostrictive material to generate the magnetostrictive effect in the longitudinal direction and the transverse direction simultaneously. The inventor finds that, through intensive research and a large number of experiments, the current magnetostrictive excitation device can only generate a unidirectional magnetic field, such as a longitudinal alternating magnetic field, so that the magnetostrictive effect of a magnetostrictive material in the magnetic field generated by the magnetostrictive excitation device is usually significant only in the aspect of the elongation effect, and the compression effect is not significant; or on the contrary the magnetostrictive effect is only significant in the compressive effect, whereas the elongation effect is insignificant. Therefore, the magnetostrictive effect of the magnetostrictive material cannot be generated simultaneously in the longitudinal direction and the transverse direction, and the overall magnetostrictive effect of the magnetostrictive material is not obvious. If a magnetostrictive excitation device can be developed to generate a composite magnetic field in which a longitudinal magnetic field and a transverse magnetic field are superimposed, and the magnetostrictive material can generate the magnetostrictive effect in the longitudinal direction and the transverse direction simultaneously, for example, the magnetostrictive material can vibrate in a twisting manner, the overall magnetostrictive effect of the magnetostrictive material can be greatly improved.
The present invention aims to alleviate or solve at least to some extent at least one of the above mentioned problems.
In one aspect of the invention, a magnetostrictive actuation device is presented. According to an embodiment of the invention, the magnetostrictive excitation device comprises: a magnetostrictive excitation source for generating an alternating magnetic field; a permanent magnet unit disposed adjacent to the magnetostrictive excitation source. Thus, the magnetostrictive excitation device has at least one of the following advantages: the composite magnetic field with the overlapped longitudinal alternating magnetic field and the transverse magnetic field can be generated, the direction, the amplitude and the frequency of the generated composite magnetic field can be controlled, the magnetostrictive effect can be simultaneously generated in the longitudinal direction and the transverse direction of the magnetostrictive material in the composite magnetic field, and the overall magnetostrictive effect of the magnetostrictive material is greatly improved.
According to an embodiment of the invention, the magnetostrictive excitation source comprises: the magnetostrictive excitation unit comprises an excitation coil and a switching tube, and the excitation coil is connected with the switching tube; the excitation power supply is connected with the magnetostrictive excitation unit and used for providing excitation energy for the magnetostrictive excitation unit; and the driving control unit is connected with the control end of the switch tube and controls the exciting coil to provide an alternating magnetic field by controlling the on and off of the switch tube. This can further improve the performance of the magnetostrictive excitation device.
According to the embodiment of the invention, when the excitation power source is an alternating current excitation source, the magnetostrictive excitation unit further comprises a resonant capacitor, the resonant capacitor is connected with a collector of the switching tube after being connected with the excitation coil in parallel, and an emitter of the switching tube is grounded. Therefore, the magnetostrictive excitation source can generate an alternating magnetic field, and the performance of the magnetostrictive excitation device is further improved.
According to an embodiment of the present invention, when the excitation power source is a dc excitation source, the magnetostrictive excitation unit further includes a protection diode, a rectifier diode, and an energy storage capacitor, wherein an anode of the protection diode is connected to one end of the excitation coil, another end of the excitation coil is connected to a collector of the switching tube and an anode of the rectifier diode, respectively, a cathode of the rectifier diode is connected to a cathode of the protection diode and then connected to one end of the energy storage capacitor, another end of the energy storage capacitor is grounded, and an emitter of the switching tube is grounded. Therefore, the magnetostrictive excitation source can generate an alternating magnetic field, and the performance of the magnetostrictive excitation device is further improved.
According to an embodiment of the invention, the magnetostrictive excitation source is arranged to be able to generate a longitudinal alternating magnetic field and the permanent magnet unit is arranged to generate a transverse magnetic field. Therefore, the magnetostrictive excitation device can generate a composite magnetic field formed by superposing the longitudinal alternating magnetic field and the transverse magnetic field, and the direction, the amplitude and the frequency of the generated composite magnetic field can be controlled.
According to an embodiment of the present invention, the permanent magnet unit includes: and the annular permanent magnet is arranged around the magnetostrictive excitation source. Therefore, the annular permanent magnet can generate a longitudinal direct current bias magnetic field, and the performance of the magnetostrictive excitation device is further improved.
According to an embodiment of the present invention, the permanent magnet unit includes: at least one group of magnetic pole pairs, wherein the at least one group of magnetic pole pairs are symmetrically arranged outside the magnetostrictive excitation source. Therefore, the magnetic pole pair can generate a transverse magnetic field, and the performance of the magnetostrictive excitation device is further improved.
According to an embodiment of the invention, the magnetostrictive excitation device comprises: the IH wire coil comprises a first coil and a second coil which are arranged in a surrounding mode, and the first coil is the exciting coil in the magnetostrictive exciting unit or one of heating coils; the second coil is the excitation coil in the magnetostrictive excitation unit, or the other of the heating coils. Therefore, the IH wire coil can enable the magnetostrictive excitation device to have a heating function, and the IH wire coil can also generate a magnetic field, so that the performance of the magnetostrictive excitation device is further improved.
In another aspect of the invention, a container is provided. According to an embodiment of the invention, the container comprises: a container body; a layer of magnetostrictive material disposed on at least a portion of a surface of the container body; and the magnetostrictive excitation device is arranged below the container body. The magnetostrictive excitation device in the container may be the magnetostrictive excitation device described above, whereby the container has all the features and advantages of the magnetostrictive excitation device described above, which will not be described in detail herein. Generally speaking, the magnetostrictive excitation device in the container can generate a composite magnetic field in which a longitudinal alternating magnetic field and a transverse magnetic field are superposed, the direction, the amplitude and the frequency of the generated composite magnetic field can be controlled, and the magnetostrictive material layer in the container can generate magnetostrictive effects in the composite magnetic field at the same time in the longitudinal direction and the transverse direction, namely, torsional vibration is generated, and the container body also generates vibration, so that the overall magnetostrictive effect of the container can be greatly improved.
According to an embodiment of the invention, the layer of magnetostrictive material is disposed on at least one of an outer surface of the bottom of the container body and an inner surface of the container body. Therefore, the container can have a magnetostrictive effect under the action of a magnetic field, and the performance of the container is further improved.
According to an embodiment of the invention, the permanent magnet unit of the magnetostrictive excitation device is arranged outside the container body. Thereby, the usability of the container can be further improved.
According to an embodiment of the invention, the layer of magnetostrictive material is made of a rare earth intermetallic magnetostrictive material. This can improve the effect of vibration due to magnetostriction.
According to an embodiment of the present invention, the container body is a pot body. Thereby, the usability of the container can be further improved.
According to an embodiment of the invention, the pot body is a metal pot, a ceramic pot, a marmite or a soil pot. Thereby, the usability of the container can be further improved.
According to an embodiment of the invention, the pan body is a metal pan, and the magnetostrictive material layer is arranged on the outer bottom surface of the pan body. Therefore, the magnetostrictive effect of the magnetostrictive material layer can be fully utilized, and the service performance of the container is further improved.
In yet another aspect of the present invention, the present invention provides a home appliance. According to an embodiment of the invention, the household appliance comprises the container as described above. The container may be the container described above, whereby the household appliance may have all the features and advantages of the container described above, which will not be described in detail herein. Generally speaking, the container of the household appliance can simultaneously generate longitudinal and transverse magnetostriction effects, namely torsional vibration, in a composite magnetic field formed by superposing a longitudinal alternating magnetic field and a transverse magnetic field, so that the overall magnetostriction effect of the household appliance is greatly improved. Therefore, when the household appliance is used for cooking food, the produced magnetostrictive effect, such as twisting and vibrating of the container, can obviously improve the taste of the food, extracts the nutrient components of the food more sufficiently, and meets the requirements of people on the improvement of the life quality of the household appliance.
According to an embodiment of the present invention, the home appliance includes: the foot pad is arranged at the bottom of the household appliance. Therefore, vibration and noise can be prevented from being transmitted through the household appliance, and the influence on an object supporting the household appliance is reduced.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic structural view of a magnetostrictive excitation device according to one embodiment of the invention;
FIG. 2 shows a schematic structural diagram of a magnetostrictive excitation device according to another embodiment of the invention;
FIG. 3a shows a schematic circuit diagram of a magnetostrictive excitation source according to an embodiment of the invention;
FIG. 3b shows a schematic circuit diagram of a magnetostrictive excitation source according to another embodiment of the invention;
FIG. 4a shows a current waveform of the excitation coil when the magnetostrictive excitation unit according to one embodiment of the invention is operated in continuous current mode;
fig. 4b shows a current waveform diagram of the excitation coil when the magnetostrictive excitation unit according to one embodiment of the invention is operated in an interrupted current mode;
fig. 4c shows a current waveform diagram of the excitation coil when the magnetostrictive excitation unit according to one embodiment of the invention is operated in the critical continuous current mode;
FIG. 5 shows a top view of a magnetostrictive actuation device according to one embodiment of the invention;
FIG. 6 shows a schematic structural diagram of a magnetostrictive excitation device according to one embodiment of the invention;
FIG. 7 shows a top view of a magnetostrictive actuation device according to one embodiment of the invention; and
FIG. 8 shows a schematic flow diagram of a container according to one embodiment of the invention.
Description of reference numerals:
100: a magnetostrictive excitation source; 200: a permanent magnet unit; 210: an annular permanent magnet; 220: a pair of magnetic poles; 310: a magnetostrictive excitation unit; 320: an excitation power supply; 321: a rectifying unit; 322: a filtering unit; 330: a drive control unit; 400: a container body; 500: a layer of magnetostrictive material; 600: a magnetostrictive excitation device.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In one aspect of the invention, a magnetostrictive actuation device is presented. According to an embodiment of the present invention, referring to fig. 1, the magnetostrictive excitation device includes: a magnetostrictive excitation source 100 for generating an alternating magnetic field, and a permanent magnet unit 200. According to an embodiment of the present invention, the permanent magnet unit 200 is disposed adjacent to the magnetostrictive excitation source 100. Thus, the magnetostrictive excitation device has at least one of the following advantages: the composite magnetic field with the overlapped longitudinal alternating magnetic field and the transverse magnetic field can be generated, the direction, the amplitude and the frequency of the generated composite magnetic field can be controlled, the magnetostrictive effect can be simultaneously generated in the longitudinal direction and the transverse direction of the magnetostrictive material in the composite magnetic field, and the overall magnetostrictive effect of the magnetostrictive material is greatly improved.
In accordance with an embodiment of the present invention, and with reference to fig. 2, a magnetostrictive excitation source 100 is configured to generate a longitudinal alternating magnetic field. According to an embodiment of the present invention, the permanent magnet unit 200 is used to generate a transverse magnetic field. According to an embodiment of the invention, the longitudinal direction is the direction a shown in fig. 2 and the transverse direction is the direction B shown in fig. 2. As mentioned above, the current magnetostrictive excitation device can only generate a unidirectional magnetic field, such as a longitudinal alternating magnetic field, which greatly limits the effect of the magnetostrictive effect generated by the magnetostrictive material in the magnetic field, such as the magnetostrictive effect is significant only in the aspect of the elongation effect, but is insignificant in the aspect of the compression effect; or on the contrary the magnetostrictive effect is only significant in the compressive effect, whereas the elongation effect is insignificant. According to the embodiment of the present invention, the longitudinal alternating magnetic field generated by the magnetic magnetostrictive excitation source 100 may be superimposed with the transverse magnetic field generated by the permanent magnet unit 200 to form a composite magnetic field, and the direction, the amplitude, and the frequency of the generated composite magnetic field may be controlled, so that when the generated composite magnetic field acts on the magnetostrictive material, the magnetostrictive effect may be greatly improved, and the elongation effect and the compression effect of the magnetostrictive material may be simultaneously significant, for example, the magnetostrictive material may generate torsional vibration.
The principle of the magnetostrictive excitation source 100 generating a longitudinal alternating magnetic field is explained in detail below:
according to an embodiment of the invention, referring to fig. 3a and 3b, the magnetically active source 100 may comprise: the magnetostrictive piezoelectric actuator comprises a magnetostrictive excitation unit 310, an excitation power supply 320 and a driving control unit 330, wherein the magnetostrictive excitation unit 310 comprises an excitation coil L and a switching tube Q, and the excitation coil L is connected with the switching tube Q; the excitation power source 320 is connected with the magnetostrictive excitation unit 310, and the excitation power source 320 is used for providing excitation energy for the magnetostrictive excitation unit 310; the driving control unit 330 is connected to the control end of the switching tube Q, and the driving control unit 330 controls the exciting coil L to provide the alternating magnetic field by controlling the on and off of the switching tube Q.
According to the embodiment of the present invention, the type of the excitation source generated by the excitation power source 320 is not particularly limited, and may be selected by those skilled in the art according to actual needs. For example, excitation power source 320 may be an alternating current excitation source, or excitation power source 320 may be a direct current excitation source, according to embodiments of the invention.
According to an embodiment of the present invention, referring to fig. 3a, when the excitation power source 320 is an ac excitation source, the magnetostrictive excitation unit 310 further includes a resonant capacitor C, which is connected to the collector of the switching tube Q (e.g., IGBT) after being connected to the excitation coil L in parallel, and the emitter of the switching tube Q is grounded GND. Specifically, when the excitation power source 320 is an ac excitation source, the excitation power source 320 may include a rectifying unit 321 and a filtering unit 322, where the rectifying unit 321 may be a rectifying bridge, and the filtering unit 322 may include a first absorption capacitor C1, a first filtering inductor L1 (or a choke coil), and a second absorption capacitor C2. The two input ends of the rectifier bridge are correspondingly connected with the power supply end of an alternating current mains supply AC, the first output end of the rectifier bridge is grounded GND, the second output end of the rectifier bridge is respectively connected with one end of a first absorption capacitor C1 and one end of a first filter inductor L1, the other end of the first absorption capacitor C1 is grounded GND, the other end of the first filter inductor L1 is respectively connected with one end of a second absorption capacitor C2, an excitation coil L and a resonant capacitor C, and the other end of the second absorption capacitor C2 is grounded GND. When the magnetostrictive excitation source 100 works, the rectifying unit 321 rectifies AC mains AC into pulsating dc power, and then outputs the constant dc power after filtering processing by the pi-type filtering unit 322 formed by the first absorption capacitor C1, the first filtering inductor L1, and the second absorption capacitor C2, so as to provide excitation energy for the magnetostrictive excitation unit 310, and at the same time, the driving control unit 330 outputs a corresponding PPG (programmable Pulse Generator) signal or PWM (Pulse Width Modulation) signal to the control end of the switching tube Q, so as to control the switching tube Q to be turned on and off, so that the excitation coil L and the resonant capacitor C resonate, thereby generating an alternating magnetic field. It should be noted that, the driving control unit 330 outputs driving signals with different duty ratios to the switching tube Q, so that the frequency of the alternating magnetic field can be effectively changed.
According to an embodiment of the present invention, referring to fig. 3b, when the excitation power source 320 is a dc excitation source, the magnetostrictive excitation unit 310 further includes a protection diode D1, a rectifier diode D2, and an energy storage capacitor C4, wherein an anode of the protection diode D1 is connected to one end of the excitation coil L, another end of the excitation coil L is respectively connected to a collector of the switching tube Q (e.g., IGBT) and an anode of the rectifier diode D2, a cathode of the rectifier diode D2 is connected to a cathode of the protection diode D1 and then connected to one end of the energy storage capacitor C4, another end of the energy storage capacitor C4 is connected to the ground GND, and an emitter of the switching tube Q is connected to the ground GND. Specifically, when the excitation power source 320 is a dc excitation source, the excitation power source 320 may include a rectifying unit 321 and a filtering unit 322, where the rectifying unit 321 may be a rectifying bridge, and the filtering unit 322 may include a third absorption capacitor C3. The two input ends of the rectifier bridge are correspondingly connected with the power supply end of the alternating current mains supply AC, the first output end of the rectifier bridge is grounded GND, the second output end of the rectifier bridge is respectively connected with one end of a third absorption capacitor C3, the exciting coil L and the protection diode D1, and the other end of the third absorption capacitor C3 is grounded GND. When the magnetostrictive source 100 works, the rectifying unit 321 rectifies alternating mains AC into pulsating direct current, and then performs low-frequency filtering processing through the third absorption capacitor C3 to provide excitation energy for the magnetostrictive excitation unit 310, and at the same time, the driving control unit 330 outputs a corresponding PPG signal or PWM signal to the control end of the switching tube Q to control the switching tube Q to be turned on and off, so that the excitation coil L is charged and discharged, and an alternating magnetic field is generated by changing the current of the excitation coil L. It should be noted that, the driving control unit 330 outputs driving signals with different duty ratios to the switching tube Q, so that the current of the exciting coil L can be effectively changed, and the amplitude of the alternating magnetic field is changed.
According to the embodiment of the present invention, the driving control unit 330 may enable the current of the excitation coil L to be in a continuous state, an intermittent state, or a critical continuous state by outputting driving signals with different duty ratios to the switching tube Q, that is, the magnetostrictive excitation unit 310 operates in a continuous current mode, an intermittent current mode, or a critical continuous current mode. Specifically, referring to fig. 4a, the magnetostrictive excitation unit 310 operates in a continuous current mode; referring to fig. 4b, the magnetostrictive excitation unit 310 operates in an intermittent current mode; referring to fig. 4c, the magnetostrictive excitation unit 310 operates in a critical continuous current mode. As can be seen from fig. 4a to 4c, the amplitude of the alternating magnetic field obtained when the magnetostrictive excitation unit 310 operates in the continuous current mode will be the largest, and the amplitude of the alternating magnetic field obtained when the magnetostrictive excitation unit 310 operates in the discontinuous current mode will be the smallest, but in either way, an alternating magnetic field can be obtained, and a wide range of amplitudes can be obtained by the cooperation of the three modes.
In summary, the magnetostrictive excitation source 100 in the magnetostrictive device provides excitation energy to the magnetostrictive excitation unit 310 through the excitation power source 310, and controls the on/off of the switching tube in the magnetostrictive excitation unit 310 through the driving control unit 330 to control the excitation coil in the magnetostrictive excitation unit 310 to provide the alternating magnetic field. The alternating magnetic field generated by the magnetostrictive excitation source 100 can be superposed with the magnetic field generated by the permanent magnet unit 200 to form a composite magnetic field, and the direction, the amplitude and the frequency of the generated composite magnetic field can be controlled, so that when the generated composite magnetic field acts on a magnetostrictive material, the magnetostrictive effect can be greatly improved, the stretching effect and the compression effect of the magnetostrictive material can be obvious at the same time, and the magnetostrictive material can generate torsional vibration.
According to an embodiment of the present invention, the specific type of the permanent magnet unit 200 is not particularly limited, and only a magnetic field for exciting the deformation of the magnetostrictive material is required. For example, according to an embodiment of the present invention, the permanent magnet unit 200 may include a ring-shaped permanent magnet, or the permanent magnet unit 200 may include at least one set of magnetic pole pairs.
According to an embodiment of the present invention, referring to fig. 5, the permanent magnet unit 200 includes a ring-shaped permanent magnet 210. According to an embodiment of the present invention, an annular permanent magnet 210 is disposed around the magnetostrictive excitation source 100. Therefore, the annular permanent magnet 210 can generate a longitudinal direct-current bias magnetic field, and the performance of the magnetostrictive excitation device is further improved.
According to an embodiment of the invention, the permanent magnet unit 200 comprises at least one set of pole pairs 220. The specific number of pole pairs 220 is not particularly limited and can be selected by one skilled in the art according to practical needs, according to embodiments of the present invention. For example, referring to fig. 6, a set of pole pairs 220 is symmetrically disposed outside of magnetostrictive excitation source 100, in accordance with an embodiment of the present invention. Alternatively, referring to fig. 7, two sets of magnetic pole pairs 220 are symmetrically disposed outside the magnetostrictive excitation source 100, wherein the electrode pairs 220A, 220A are disposed in pairs and correspond to each other, and the electrode pairs 220B, 220B are disposed in pairs and correspond to each other. Specifically, 220A may be an N-pole, 220A may be an S-pole; 220B may be N-pole and 220B may be S-pole. Thus, the pair of magnetic poles 220 can generate a transverse magnetic field, further improving the performance of the magnetostrictive excitation device.
According to an embodiment of the invention, the magnetostrictive excitation device further comprises: an IH wire coil. The IH wire coil comprises a first coil and a second coil which are arranged in a surrounding mode, and the first coil and the second coil are used for generating a magnetic field and heating respectively. According to an embodiment of the present invention, the IH coil defines therein a magnetic field region and a heating region, the excitation coil in the magnetostrictive excitation unit is disposed in the magnetic field region, and the heating coil is disposed in the heating region. According to the embodiment of the invention, the excitation coil in the IH wire coil can generate a longitudinal alternating magnetic field, and the longitudinal alternating magnetic field and the transverse magnetic field generated by the annular permanent magnet are overlapped to form a composite magnetic field, so that the magnetostrictive material transversely and longitudinally deforms and vibrates in the composite magnetic field at the same time. According to the embodiment of the invention, the IH wire coil can enable the magnetostrictive excitation device to have a heating function, the heating coil of the IH wire coil can be used for heating, the heating coil is not required to be in contact with a heated object, for example, a container with magnetostrictive materials is not required to be in contact with the heating coil, and the problem that the bottom of the container is in poor contact with the heating coil in the vibration process of the container with magnetostrictive materials in a composite magnetic field to cause poor heat transfer effect can be avoided. In another aspect of the invention, a container is provided. According to an embodiment of the present invention, referring to fig. 8, the container includes: a container body 300, a layer of magnetostrictive material 400, and a magnetostrictive actuation device 500 as previously described. According to an embodiment of the present invention, a layer of magnetostrictive material 400 is disposed on at least a portion of the surface of container body 300. According to an embodiment of the present invention, the magnetostrictive excitation device 500 is disposed below the container body 300. The magnetostrictive excitation device 500 in the container may be the magnetostrictive excitation device described above, whereby the container has all the features and advantages of the magnetostrictive excitation device described above, which will not be described herein again. In summary, the magnetostrictive excitation device 500 in the container can generate a composite magnetic field in which a longitudinal alternating magnetic field and a transverse magnetic field are superimposed, the direction, the amplitude and the frequency of the generated composite magnetic field can be controlled, and the magnetostrictive material layer 400 in the container can generate magnetostrictive effects, i.e., torsional vibration, in the longitudinal direction and the transverse direction of the composite magnetic field at the same time, and the container body 300 also vibrates, so that the overall magnetostrictive effect of the container can be greatly improved. Also, the magnetostrictive material layer 400 does not vibrate mechanically fatigued and does not require a vibration space.
According to an embodiment of the present invention, the permanent magnet unit 200 of the magnetostrictive excitation device 500 is disposed outside the container body 300. Thereby, the permanent magnet unit 200 may generate a corresponding magnetic field, further improving the performance of the container.
According to an embodiment of the present invention, a specific material forming the magnetostrictive material layer 300 is not particularly limited, and it is only necessary that the formed magnetostrictive material layer 300 has a magnetostrictive effect in a magnetic field. For example, according to an embodiment of the present invention, the magnetostrictive material layer may be formed of a rare earth intermetallic magnetostrictive material. Therefore, the magnetostrictive material layer can be formed by using the rare earth intermetallic compound magnetostrictive material, and the service performance of the container is further improved. According to an embodiment of the present invention, the specific type of the above-described rare earth intermetallic compound magnetostrictive material is not particularly limited, for exampleMay be (Tb, Dy) Fe2The alloy with the compound as the matrix, namely the Tb-Dy-Fe material, has a magnetostriction coefficient lambda of 1500-2000 ppm. Therefore, the rare earth intermetallic compound magnetostrictive material has at least one of the following advantages: the magnetostriction coefficient lambda is 50 times of that of the traditional material; the generated thrust is very large, and the thrust generated by a bar with the diameter of 10mm is about 200 kg; the energy conversion efficiency is as high as 70%; the elastic modulus of the magnetic material can be changed along with the magnetic field and can be regulated and controlled; the response time is short, only one millionth of a second. Therefore, the magnetostrictive material layer 300 formed of the rare earth intermetallic magnetostrictive material can generate torsional vibration under the action of the composite magnetic field, and the performance of the container can be further improved.
The specific location where the magnetostrictive material layer 300 is formed is not particularly limited and may be selected by those skilled in the art according to actual needs, according to an embodiment of the present invention. For example, according to an embodiment of the present invention, the magnetostrictive material layer 300 may be disposed on the outer surface of the bottom of the container body 300 or may be disposed on the inner surface of the container body 300. Therefore, the container can have a magnetostrictive effect under the action of a magnetic field, and the performance of the container is further improved.
According to an embodiment of the present invention, the specific type of the container body 300 is not particularly limited. For example, according to an embodiment of the present invention, the container body 300 may be a pot body. Thereby, the usability of the container can be further improved. The specific type of the pan body according to the embodiment of the present invention is not particularly limited, and those skilled in the art can select the type according to actual needs. For example, according to an embodiment of the present invention, the pot body may be a metal pot, a ceramic pot, a marmite or an earth pot. According to an embodiment of the present invention, when the magnetostrictive material layer 300 is disposed on the outer bottom surface of the pot body, the pot body may be a metal pot. According to an embodiment of the present invention, when the magnetostrictive material layer 300 is disposed on the inner surface of the pot body, the pot body may be a ceramic pot, a marmite or a soil pot. Therefore, the magnetostrictive effect of the magnetostrictive material layer can be fully utilized, and the service performance of the container is further improved.
In yet another aspect of the present invention, the present invention provides a home appliance. According to an embodiment of the invention, the household appliance comprises the container as described above. The container may be the container described above, whereby the household appliance may have all the features and advantages of the container described above, which will not be described in detail herein. According to the embodiment of the present invention, the specific type of the home appliance is not particularly limited, and those skilled in the art may select it according to actual needs. For example, the household appliance may be a rice cooker or a pressure cooker. Along with the improvement of living standard, people pay attention to the convenience brought by household appliances in life and pay more and more attention to the improvement of the quality of life of the household appliances. For example, as an electric rice cooker (pot) and a pressure cooker which are important components of a household appliance, people pay more attention to the improvement of food taste and the extraction of nutritional ingredients and the like of the electric rice cooker or the pressure cooker. According to the embodiment of the invention, when the household appliance is used for cooking food, the magnetostrictive effect generated by the container of the household appliance, such as twisting and vibrating the container, can also vibrate the food in the container, so that compared with a traditional electric rice cooker or pressure cooker, the food cooking device can obviously improve the taste of the food, extract more sufficient nutrient components of the food, and meet the requirements of people on improvement of life quality of the household appliance. Also, the magnetostrictive material contained in the container does not vibrate mechanically fatigued and does not require a vibration space. Generally speaking, the container of the household appliance can simultaneously generate longitudinal and transverse magnetostrictive effects, namely torsional vibration, in a composite magnetic field formed by superposing a longitudinal alternating magnetic field and a transverse magnetic field generated by a magnetostrictive excitation device, so that the overall magnetostrictive effect of the household appliance is greatly improved, and when the container is used for cooking food, the taste of the food can be obviously improved, and the extraction of the nutritional ingredients of the food is more sufficient.
According to an embodiment of the invention, the household appliance comprises a foot pad. According to an embodiment of the present invention, the foot pad is disposed at the bottom of the household appliance. The specific type of footpad according to the embodiment of the present invention is not particularly limited, and may be selected by those skilled in the art according to actual needs. For example, according to an embodiment of the present invention, the footpad may be a silicone footpad. The foot pad provided at the bottom of the home appliance can prevent vibration and noise from being transmitted downward, for example, to a table supporting the home appliance, and thus, the foot pad can reduce the influence on an object supporting the home appliance.
In the description of the present invention, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description herein, references to the description of "one embodiment," "another embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. In addition, it should be noted that the terms "first" and "second" in this specification are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (14)
1. A container, characterized in that it comprises:
a container body;
a layer of magnetostrictive material disposed on an outer surface of the bottom of the container body, or on an inner surface of the container body, or on both the outer surface of the bottom of the container body and the inner surface of the container body; and
a magnetostrictive excitation device disposed below the container body, the magnetostrictive excitation device comprising: a magnetostrictive excitation source for generating an alternating magnetic field; and the permanent magnet unit is arranged adjacent to the magnetostrictive excitation source, the magnetostrictive excitation source is arranged to be capable of generating a longitudinal alternating magnetic field, and the permanent magnet unit is used for generating a transverse magnetic field.
2. The container of claim 1, wherein the magnetostrictive material layer has a magnetostrictive coefficient λ of 1500-:
the magnetostrictive excitation unit comprises an excitation coil and a switching tube, and the excitation coil is connected with the switching tube;
the excitation power supply is connected with the magnetostrictive excitation unit and used for providing excitation energy for the magnetostrictive excitation unit;
and the driving control unit is connected with the control end of the switch tube and controls the exciting coil to provide an alternating magnetic field by controlling the on and off of the switch tube.
3. The container according to claim 2, wherein when the excitation power source is an ac excitation source, the magnetostrictive excitation unit further comprises a resonant capacitor, the resonant capacitor is connected to a collector of the switching tube after being connected in parallel with the excitation coil, and an emitter of the switching tube is grounded.
4. The container according to claim 2, wherein when the excitation power source is a dc excitation source, the magnetostrictive excitation unit further comprises a protection diode, a rectifier diode and an energy storage capacitor, wherein an anode of the protection diode is connected to one end of the excitation coil, another end of the excitation coil is respectively connected to a collector of the switching tube and an anode of the rectifier diode, a cathode of the rectifier diode is connected to a cathode of the protection diode and then connected to one end of the energy storage capacitor, another end of the energy storage capacitor is grounded, and an emitter of the switching tube is grounded.
5. The container according to claim 1, wherein the permanent magnet unit comprises:
and the annular permanent magnet is arranged around the magnetostrictive excitation source.
6. The container according to claim 1, wherein the permanent magnet unit comprises:
at least one group of magnetic pole pairs, wherein the at least one group of magnetic pole pairs are symmetrically arranged outside the magnetostrictive excitation source.
7. The container according to claim 2, comprising:
the IH wire coil comprises a first coil and a second coil which are arranged in a surrounding mode, and the first coil is the exciting coil or the heating coil in the magnetostrictive excitation unit;
the second coil is the excitation coil in the magnetostrictive excitation unit, or a heating coil,
and one of the first coil and the second coil is used for generating a magnetic field and the other is used for heating.
8. A container according to claim 1, wherein the permanent magnet unit of the magnetostrictive excitation device is arranged outside the container body.
9. The container of claim 1, wherein the layer of magnetostrictive material is comprised of a rare earth intermetallic magnetostrictive material.
10. The container of claim 1, wherein the container body is a pot.
11. The container of claim 10, wherein the pot body is a metal pot, a ceramic pot, a marmite or a soil pot.
12. The container of claim 11, wherein the pan body is a metal pan, and the layer of magnetostrictive material is disposed on an exterior bottom surface of the pan body.
13. A household appliance, characterized in that it comprises a container according to any one of claims 1 to 12.
14. The household appliance according to claim 13, comprising:
the foot pad is arranged at the bottom of the household appliance.
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| CN201710876073.0A CN109560719B (en) | 2017-09-25 | 2017-09-25 | Magnetostrictive excitation device, container and household appliance |
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| CN201710876073.0A CN109560719B (en) | 2017-09-25 | 2017-09-25 | Magnetostrictive excitation device, container and household appliance |
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| CN109560719B true CN109560719B (en) | 2020-06-05 |
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| CN114627752B (en) * | 2020-12-11 | 2024-01-26 | 京东方科技集团股份有限公司 | Display panel and display device thereof |
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