A refrigerator and a control method for an ultrasonic processing device thereof

Abstract

The present invention provides a refrigerator and a control method for an ultrasonic processing device thereof. The ultrasonic processing device is disposed in a storage compartment of the refrigerator and includes a container, an ultrasonic generator, and two ultrasonic transducers. The container is used to hold food to be pickled. The two ultrasonic transducers are disposed relative to each other on the periphery of the container. Two output ends of the ultrasonic generator are electrically connected to the two ultrasonic transducers, respectively. The control method comprises: upon receiving a user-selected start command, activating the ultrasonic generator; and controlling the ultrasonic generator to alternately output high-frequency pulse signals to the two ultrasonic transducers, such that the two ultrasonic transducers simultaneously apply ultrasonic effects to the food in the container on a macroscopic scale. The present invention has the advantages of significantly improving the pickling speed and quality of food and reducing the dynamic switching losses of the ultrasonic transducers.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration and freezing, and in particular to a refrigerator and a control method of an ultrasonic processing device thereof. Background Art

[0002] In recent years, with the changes in people's dietary structure, pickling has become a key link in the meat processing process. In order to increase the pickling speed, many improvement schemes have emerged in the existing technology. For example, ultrasonic transducers are set on the upper and lower surfaces of the pickling container. Since the upper and lower ultrasonic transducers are started at the same time, the ultrasonic effects generated by the two ultrasonic transducers will cancel each other out, resulting in a decrease in the working efficiency of the ultrasonic transducer. Therefore, the usual practice is to start and shut down the two ultrasonic transducers in turn to achieve the purpose of applying ultrasonic effects to the food from different directions. However, this method has the following two defects: First, the two ultrasonic transducers need to be started and shut down frequently, which seriously shortens the service life of the ultrasonic transducers. Second, starting the two ultrasonic transducers in turn cannot significantly improve the pickling speed and pickling effect of the food. Summary of the Invention

[0003] One purpose of the first aspect of the present invention is to significantly improve the pickling speed and pickling effect of food and reduce the dynamic switching loss of the ultrasonic transducer.

[0004] A further object of the first aspect of the present invention is to minimize the total time required to marinate food.

[0005] A second aspect of the present invention is to provide a refrigerator.

[0006] In particular, according to a first aspect of the present invention, the present invention provides a control method for an ultrasonic processing device, wherein the ultrasonic processing device is disposed in a storage compartment of a refrigerator, and comprises a container, an ultrasonic generator, and two ultrasonic transducers. The container is used to hold food to be pickled, and the two ultrasonic transducers are disposed oppositely on the outer periphery of the container. Two output ends of the ultrasonic generator are electrically connected to the two ultrasonic transducers, respectively. The control method comprises:

[0007] When receiving the start instruction selected by the user, starting the ultrasonic generator;

[0008] The ultrasonic generator is controlled to alternately output high-frequency pulse signals to the two ultrasonic transducers, so that the two ultrasonic transducers simultaneously apply ultrasonic effects to the food in the container on a macroscopic level.

[0009] Optionally, the high-frequency pulse signal is divided into two sections, the first section is a start signal for controlling the start of the ultrasonic transducer, and the second section is a stop signal for controlling the stop of the ultrasonic transducer.

[0010] Optionally, the step of controlling the ultrasonic generator to alternately transmit high-frequency pulse signals to the two ultrasonic transducers includes:

[0011] First, one of the output ends of the ultrasonic generator is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. After the high-frequency pulse signal is output, the other output end of the ultrasonic generator is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. After the high-frequency pulse signal is output, the previous output end is controlled to output the high-frequency pulse signal again.

[0012] Optionally, the step of controlling the ultrasonic generator to alternately transmit high-frequency pulse signals to the two ultrasonic transducers includes:

[0013] First, one of the output ends of the ultrasonic generator is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. During the output period of the stop signal of the high-frequency pulse signal, the other output end of the ultrasonic generator is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. During the output period of the stop signal of the high-frequency pulse signal, the previous output end is controlled again to output the high-frequency pulse signal.

[0014] Optionally, thyristors are provided at both output ends of the ultrasonic generator.

[0015] Optionally, the control method further includes:

[0016] Get the surface temperature of food in the container;

[0017] Determining whether the surface temperature is less than or equal to a first temperature threshold;

[0018] If so, the ultrasonic generator is controlled to continue to alternately transmit high-frequency pulse signals to the two ultrasonic transducers.

[0019] Optionally, after the step of determining whether the surface temperature of the food is less than or equal to the first temperature threshold, the method further includes:

[0020] If the surface temperature of the food is greater than the first temperature threshold, determining whether the surface temperature of the food is less than or equal to a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold;

[0021] If yes, the ultrasonic generator is controlled to continue to alternately transmit high-frequency pulse signals to the two ultrasonic transducers;

[0022] If not, the ultrasonic generator is turned off and restarted after the surface temperature of the food is less than or equal to the first temperature threshold.

[0023] Optionally, the difference between the second temperature threshold and the first temperature threshold is ≥4°C.

[0024] Optionally, the container comprises a container body and an upper cover removably placed in the container body; and

[0025] Two ultrasonic transducers are oppositely arranged on the outside of the front and rear side walls of the container body; or

[0026] Two ultrasonic transducers are oppositely arranged on the outside of the left and right side walls of the container body; or

[0027] One of the two ultrasonic transducers is arranged on the top outer side of the upper cover, and the other is arranged on the bottom outer side of the container body.

[0028] According to a second aspect of the present invention, the present invention provides a refrigerator comprising:

[0029] a box body defining a storage compartment therein;

[0030] an ultrasonic treatment device, disposed in the storage room; and

[0031] The controller includes a memory and a processor. The memory stores a control program, and the control program is used to implement any one of the above control methods when executed by the processor.

[0032] The control method of the ultrasonic processing device of the present invention controls the ultrasonic transducer to alternately output high-frequency pulse signals to the two ultrasonic transducers after starting the ultrasonic generator. From a microscopic perspective, the two ultrasonic transducers alternately receive high-frequency pulse signals and start and stop mutually exclusive, which will not cause the ultrasonic effects generated by the two ultrasonic transducers to cancel each other out. From a macroscopic perspective, since the interval between the two ultrasonic transducers receiving the high-frequency pulse signals is on the millisecond time scale, the two ultrasonic transducers apply ultrasonic effects to the food in the container almost simultaneously, significantly improving the pickling speed and pickling effect of the food. And since the two ultrasonic transducers are started and stopped by the high-frequency pulse signals, there is no need to frequently turn the ultrasonic transducers on and off from the outside, which reduces the dynamic loss of the ultrasonic transducers.

[0033] Furthermore, the control method of the ultrasonic processing device of the present invention controls the ultrasonic generator to alternately transmit high-frequency pulse signals to two ultrasonic transducers. This method involves first controlling one output terminal of the ultrasonic generator to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. During the period when the high-frequency pulse signal is outputting a stop signal, the other output terminal of the ultrasonic generator is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. Finally, during the period when the high-frequency pulse signal is outputting a stop signal, the previous output terminal is controlled to output a high-frequency pulse signal again. This improves the overall operating efficiency of the two ultrasonic transducers and minimizes the total curing time.

[0034] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0036] Figure 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

[0037] Figure 2 is a schematic structural diagram of an ultrasonic processing device according to one embodiment of the present invention;

[0038] Figure 3 is an output state diagram of a high-frequency pulse signal according to an embodiment of the present invention;

[0039] Figure 4 is a structural block diagram of a refrigerator according to an embodiment of the present invention;

[0040] Figure 5 is a schematic diagram of a control method for an ultrasonic processing device according to one embodiment of the present invention;

[0041] Figure 6 is a flowchart of a method for controlling an ultrasonic processing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0043] The present invention first provides a refrigerator 10, Figure 1 is a schematic structural diagram of a refrigerator 10 according to an embodiment of the present invention, referring to Figure 1 The refrigerator 10 generally includes a housing 100, and one or more storage compartments 110 are formed in the housing 100. The storage compartments 110 can be configured as a refrigerated storage compartment 110, a frozen storage compartment 110, and a variable temperature storage compartment 110 according to the refrigeration temperature. Specifically, the number, function, layout, etc. of the storage compartments 110 can be configured according to actual needs.

[0044] An ultrasonic processing device 200 is provided in the storage compartment 110. The ultrasonic processing device 200 is mainly used for auxiliary pickling of food ingredients to improve the pickling speed and pickling effect of the food ingredients. The storage compartment 110 in which the ultrasonic processing device 200 is located can be the refrigerated storage compartment 110 of the refrigerator 10. The temperature of the refrigerated storage compartment 110 is configured to be 0°C to 10°C, providing a low-temperature environment for pickling food ingredients, thereby inhibiting the growth and reproduction of bacteria and preventing the food ingredients from spoiling during the pickling process.

[0045] Figure 2 is a schematic diagram of an ultrasonic processing device 200 according to an embodiment of the present invention, referring to Figure 2 The ultrasonic processing device 200 may include a container 210, two ultrasonic transducers 220 and an ultrasonic generator 230, wherein the container 210 is used to hold the food to be pickled, the two ultrasonic transducers 220 are relatively arranged on the periphery of the container 210, and the two output ends of the ultrasonic generator 230 are respectively electrically connected to the two ultrasonic transducers 220, and are used to alternately output high-frequency pulse signals to the two ultrasonic transducers 220, so that the two ultrasonic transducers 220 can apply ultrasonic effects to the food from different directions, thereby improving the pickling speed and pickling effect of the food.

[0046] In this embodiment, the container 210 may be in the shape of a rectangular parallelepiped, and includes a container body 211 and an upper cover 212. The upper cover 212 is placed in the container body 211 in a removable manner. Figure 2 In the figure, the shaded portion below the upper cover 212 represents the food. When actually in use, first take out the upper cover 212, then place the pickling liquid and the food to be pickled in the container body 211, and finally place the upper cover 212 in the container body 211 and press it on the surface of the food.

[0047] The two ultrasonic transducers 220 can be relatively arranged on the outside of the front and rear side walls of the container body 211, or relatively arranged on the outside of the left and right side walls of the container body 211. Alternatively, one of the ultrasonic transducers 220 can be arranged on the outside of the top of the upper cover 212 and the other on the outside of the bottom of the container body 211. Of course, without departing from the principles of the present invention, those skilled in the art can also arrange ultrasonic transducers 220 on the outside of the front and rear side walls, the outside of the left and right side walls, the top of the upper cover 212, and the bottom of the container body 211, and each ultrasonic transducer 220 is electrically connected to an output terminal of the ultrasonic generator 230.

[0048] It should be noted that the high-frequency pulse signal generated by the ultrasonic generator 230 is not a continuous signal, but an intermittent signal on a millisecond time scale. It is only in the process of alternately outputting high-frequency pulse signals to the two ultrasonic transducers 220 that the user's macroscopic feeling is that the two ultrasonic transducers 220 are simultaneously applying ultrasonic effects to the food in the container 210. In fact, the two ultrasonic transducers 220 are alternately started and stopped at the microscopic level, thereby avoiding the ultrasonic effects generated by the two ultrasonic transducers 220 from being transmitted in opposite directions and canceling each other out, thereby effectively ensuring the working efficiency of the ultrasonic transducer 220.

[0049] Figure 3 is an output state diagram of a high-frequency pulse signal according to an embodiment of the present invention, referring to Figure 3 The high-frequency pulse signal is divided into two sections. The first section is a start signal for controlling the start of the ultrasonic transducer 220 , and the second section is a stop signal for controlling the stop of the ultrasonic transducer 220 .

[0050] In this embodiment, both output terminals of the ultrasonic generator 230 are equipped with thyristors. Only when the thyristors are turned on can the output terminals output high-frequency pulse signals. Otherwise, the high-frequency pulse signals will be blocked from being output.

[0051] Figure 4 is a block diagram of a refrigerator 10 according to an embodiment of the present invention, referring to Figure 4 A controller 300 may also be provided in the refrigerator 10 having the ultrasonic processing device 200 .

[0052] The controller 300 includes a memory 320 and a processor 310. The memory 320 stores a control program 321. When the control program 321 is executed by the processor 310, it is used to implement the control method of the ultrasonic processing device 200 of the present embodiment. The controller 300 is connected to the ultrasonic generator 230 by signal and is used to control the start and stop of the ultrasonic generator 230. The controller 300 can be integrated into the main control board of the refrigerator 10 or can be separately provided near the ultrasonic generator 230. The controller 300 can further be connected to the main control device by signal, provide the main control device with the operating status of the ultrasonic generator 230, and receive control instructions from the main control device.

[0053] The controller 300 may be implemented by various devices with certain data processing capabilities. In a typical configuration, the controller 300 may include a processor 310 , a memory 320 , an input / output interface, and the like.

[0054] Figure 5 is a flow chart of a control method of an ultrasonic processing device 200 according to an embodiment of the present invention, referring to Figure 5 , the control method at least includes the following steps S102 to S104.

[0055] Step S102 : When the start instruction selected by the user is received, the ultrasonic generator 230 is started.

[0056] Step S104 : Control the ultrasonic generator 230 to alternately output high-frequency pulse signals to the two ultrasonic transducers 220 , so that the two ultrasonic transducers 220 simultaneously apply ultrasonic action to the food in the container 210 at a macroscopic level.

[0057] The control method of the ultrasonic processing device 200 of the present invention, after starting the ultrasonic generator 230, controls the ultrasonic transducer 220 to alternately output high-frequency pulse signals to the two ultrasonic transducers 220. From a microscopic perspective, the two ultrasonic transducers 220 alternately receive high-frequency pulse signals and start and stop mutually exclusive, which does not cause the ultrasonic effects generated by the two ultrasonic transducers 220 to cancel each other out. From a macroscopic perspective, since the interval between the two ultrasonic transducers 220 receiving the high-frequency pulse signals is on the millisecond time scale, the two ultrasonic transducers 220 apply ultrasonic effects to the food in the container 210 almost simultaneously, significantly improving the pickling speed and pickling effect of the food. And because the two ultrasonic transducers 220 are started and stopped by the high-frequency pulse signals, there is no need to frequently turn the ultrasonic transducers 220 on and off from the outside, reducing the dynamic loss of the ultrasonic transducers 220.

[0058] In an optional embodiment, the step of controlling the ultrasonic generator 230 to alternately transmit high-frequency pulse signals to the two ultrasonic transducers 220 may be to first control one of the output ends of the ultrasonic generator 230 to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer 220, and after the high-frequency pulse signal is output, control the other output end of the ultrasonic generator 230 to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer 220, until the high-frequency pulse signal is output, and then control the previous output end to output the high-frequency pulse signal again.

[0059] In another optional embodiment, the step of controlling the ultrasonic generator 230 to alternately transmit high-frequency pulse signals to the two ultrasonic transducers 220 may be to first control one of the output ends of the ultrasonic generator 230 to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer 220, and during the output of the stop signal of the high-frequency pulse signal, control the other output end of the ultrasonic generator 230 to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer 220, and during the output of the stop signal of the high-frequency pulse signal, re-control the previous output end to output the high-frequency pulse signal.

[0060] Both of the above optional implementations can realize the mutually exclusive start and stop of the two ultrasonic transducers 220 at the microscopic level. The former is easier to implement, while the latter can further shorten the total time required for marinating food.

[0061] In the process of controlling the ultrasonic generator 230 to alternately output high-frequency pulse signals to the two ultrasonic transducers 220, the surface temperature of the food in the container 210 can also be obtained, and then it is determined whether the surface temperature is less than or equal to the first temperature threshold. When the surface temperature is less than or equal to the first temperature threshold, it means that the current temperature of the food is low and its surface will not be cooked by the heat generated by the ultrasonic transducer 220. The ultrasonic generator 230 can be controlled to continue to alternately transmit high-frequency pulse signals to the two ultrasonic transducers 220, thereby ensuring the smooth progress of the pickling work.

[0062] Furthermore, when the surface temperature of the food is greater than the first temperature threshold, it can also be determined whether the surface temperature of the food is less than or equal to a second temperature threshold, where the second temperature threshold is greater than the first temperature threshold. If the surface temperature of the food is less than or equal to the second temperature threshold, it indicates that the current temperature of the food is relatively low, and the ultrasonic generator 230 can be controlled to continue to alternately transmit high-frequency pulse signals to the two ultrasonic transducers 220. If the surface temperature of the food is greater than the second temperature threshold, it indicates that the current temperature of the food is already high, and the ultrasonic generator 230 should be turned off, and the two ultrasonic transducers 220 should be shut down and cooled until the surface temperature of the food is less than or equal to the first temperature threshold, and then the ultrasonic generator 230 can be restarted. This avoids continuing to operate the ultrasonic transducer 220 when the surface temperature of the food is high, which may cause the surface of the food to become cooked.

[0063] It should be noted that the difference between the second temperature threshold and the first temperature threshold should be ≥ 4°C. The first temperature threshold can be 1°C to 30°C, for example, 5°C, 10°C, 20°C, 28°C, etc. The second temperature threshold is 15°C to 35°C, for example, 16°C, 20°C, 30°C, 32°C, etc. In this embodiment, the first temperature threshold is 28°C and the second temperature threshold is 32°C.

[0064] Figure 6 is a flow chart of a control method of an ultrasonic processing device 200 according to an embodiment of the present invention, referring to Figure 6 , the control method at least includes the following steps S202 to S216.

[0065] Step S202: Start the ultrasonic generator 230.

[0066] Step S204 : Control the ultrasonic generator 230 to alternately output high-frequency pulse signals to the two ultrasonic transducers 220 .

[0067] Step S206 , obtaining the surface temperature of the food in the container 210 .

[0068] Step S208 , determining whether the surface temperature is less than or equal to a first temperature threshold; if so, returning to step S204 ; if not, executing step S210 .

[0069] Step S210 , determining whether the surface temperature is less than or equal to a second temperature threshold; if so, returning to step S204 ; if not, executing step S212 .

[0070] Step S212: Turn off the ultrasonic generator 230.

[0071] Step S214 , re-obtaining the surface temperature of the food in the container 210 .

[0072] Step S216 , determining whether the re-acquired surface temperature is less than or equal to the first temperature threshold; if so, returning to step S202 .

[0073] According to any one of the above optional embodiments or a combination of multiple optional embodiments, the embodiments of the present invention can achieve the following beneficial effects:

[0074] The control method of the ultrasonic processing device 200 of the present invention, after starting the ultrasonic generator 230, controls the ultrasonic transducer 220 to alternately output high-frequency pulse signals to the two ultrasonic transducers 220. From a microscopic perspective, the two ultrasonic transducers 220 alternately receive high-frequency pulse signals and start and stop mutually exclusive, which does not cause the ultrasonic effects generated by the two ultrasonic transducers 220 to cancel each other out. From a macroscopic perspective, since the interval between the two ultrasonic transducers 220 receiving the high-frequency pulse signals is on the millisecond time scale, the two ultrasonic transducers 220 apply ultrasonic effects to the food in the container 210 almost simultaneously, significantly improving the pickling speed and pickling effect of the food. And because the two ultrasonic transducers 220 are started and stopped by the high-frequency pulse signals, there is no need to frequently turn the ultrasonic transducers 220 on and off from the outside, reducing the dynamic loss of the ultrasonic transducers 220.

[0075] Furthermore, the control method of the ultrasonic processing device 200 of the present invention controls the ultrasonic generator 230 to alternately transmit high-frequency pulse signals to the two ultrasonic transducers 220. This method involves first controlling one output terminal of the ultrasonic generator 230 to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer 220. During the period when the high-frequency pulse signal is not output, the other output terminal of the ultrasonic generator 230 is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer 220. During the period when the high-frequency pulse signal is not output, the previous output terminal is controlled to output the high-frequency pulse signal again. This improves the overall operating efficiency of the two ultrasonic transducers 220 and minimizes the total curing time.

[0076] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A control method for an ultrasonic processing device, wherein the ultrasonic processing device is disposed in a storage compartment of a refrigerator and comprises a container, an ultrasonic generator, and two ultrasonic transducers. The container is used to hold food to be pickled. The two ultrasonic transducers are disposed oppositely on the periphery of the container. Two output ends of the ultrasonic generator are electrically connected to the two ultrasonic transducers, respectively. The control method comprises: When receiving the start instruction selected by the user, starting the ultrasonic generator; The ultrasonic generator is controlled to alternately output high-frequency pulse signals to the two ultrasonic transducers, so that the two ultrasonic transducers simultaneously apply ultrasonic effects to the food in the container on a macroscopic level.

2. The control method according to claim 1, wherein: The high-frequency pulse signal is divided into two sections, the first section is a start signal for controlling the start of the ultrasonic transducer, and the second section is a stop signal for controlling the stop of the ultrasonic transducer.

3. The control method according to claim 2, wherein: The step of controlling the ultrasonic generator to alternately transmit high-frequency pulse signals to the two ultrasonic transducers comprises: First, one of the output ends of the ultrasonic generator is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. After the high-frequency pulse signal is output, the other output end of the ultrasonic generator is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. After the high-frequency pulse signal is output, the previous output end is controlled to output the high-frequency pulse signal again.

4. The control method according to claim 2, wherein: The step of controlling the ultrasonic generator to alternately transmit high-frequency pulse signals to the two ultrasonic transducers comprises: First, one of the output ends of the ultrasonic generator is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. During the output period of the stop signal of the high-frequency pulse signal, the other output end of the ultrasonic generator is controlled to transmit a high-frequency pulse signal to the corresponding ultrasonic transducer. During the output period of the stop signal of the high-frequency pulse signal, the previous output end is controlled again to output the high-frequency pulse signal.

5. The control method according to claim 1, wherein Thyristors are provided at both output ends of the ultrasonic generator.

6. The control method according to claim 1, further comprising: Obtaining the surface temperature of the food in the container; Determining whether the surface temperature is less than or equal to a first temperature threshold; If so, the ultrasonic generator is controlled to continue to alternately transmit high-frequency pulse signals to the two ultrasonic transducers.

7. The control method according to claim 6, wherein: After the step of determining whether the surface temperature of the food is less than or equal to a first temperature threshold, the method further includes: If the surface temperature of the food is greater than the first temperature threshold, determining whether the surface temperature of the food is less than or equal to a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold; If yes, controlling the ultrasonic generator to continue to alternately transmit high-frequency pulse signals to the two ultrasonic transducers; If not, the ultrasonic generator is turned off and restarted until the surface temperature of the food is less than or equal to the first temperature threshold.

8. The control method according to claim 7, wherein The difference between the second temperature threshold and the first temperature threshold is ≥4°C.

9. The control method according to claim 1, wherein: The container comprises a container body and an upper cover which is removably placed in the container body; and The two ultrasonic transducers are arranged oppositely on the outside of the front and rear side walls of the container body; or The two ultrasonic transducers are oppositely arranged on the outside of the left and right side walls of the container body; or One of the two ultrasonic transducers is arranged on the outer side of the top of the upper cover, and the other is arranged on the outer side of the bottom of the container body.

10. A refrigerator comprising: a box body defining a storage compartment therein; An ultrasonic processing device is arranged in the storage room; as well as A controller comprising a memory and a processor, wherein a control program is stored in the memory, and when the control program is executed by the processor, it is used to implement the control method according to any one of claims 1 to 9.

Images