Food crushing device and control method thereof

Abstract

The invention relates to the technical field of household appliances, and discloses a food crushing device and a control method thereof. The shell is arranged outside the inner container; the first capacitor pole piece is arranged on the outer side of the inner container; the second capacitor pole piece is arranged on the inner side of the shell and is opposite to the first capacitor pole piece; the control module is in communication connection with the first capacitor pole piece and the second capacitor pole piece and can judge the temperature of the inner container according to the capacitance change between the first capacitor pole piece and the second capacitor pole piece; according to the food crushing device, the capacitance pole pieces are arranged between the inner shell and the outer shell, in the testing process, the first capacitance pole piece and the second capacitance pole piece do not make contact with food in the inner container, the situation that the detection accuracy is affected due to the fact that the first capacitance pole piece and the second capacitance pole piece are abraded and polluted is avoided, and the detection efficiency is improved. In addition, the first capacitor pole piece and the second capacitor pole piece can be suitable for severe environments such as high temperature and humidity.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a food crushing device and a control method thereof. Background Art

[0002] A meat grinder, for example, is a common kitchen appliance used to break down large chunks of meat into fine pieces. It's widely used in home cooking and the food processing industry. During the mincing process, mechanical friction and motor heat generate significant heat, causing the meat's temperature to rise. High temperatures can denature proteins, affecting the meat's texture and nutritional value, particularly losing its original gelatinous texture.

[0003] In the related art, some meat grinders include a refrigerator and a temperature sensor. The temperature sensor detects the temperature inside the meat grinder. The refrigerator can cool the meat filling in the meat grinder when the temperature inside the meat grinder is too high. However, in order to ensure that the temperature sensor can detect the temperature inside the meat grinder, the temperature sensor needs to be installed inside the meat grinder, which makes the temperature sensor easy to wear and contaminate, easily affects the accuracy of detection, and is inconvenient to clean. Summary of the Invention

[0004] In view of this, the present invention provides a food crushing device and a control method thereof to solve the problem in the related art that the temperature sensor of the food crushing device is easily worn and contaminated, which easily affects the accuracy of detection and is inconvenient to clean.

[0005] In a first aspect, the present invention provides a food crushing device, comprising:

[0006] liner;

[0007] The outer shell is arranged outside the inner shell;

[0008] A first capacitor electrode is provided on the outside of the inner tank;

[0009] The second capacitor electrode is disposed on the inner side of the housing and is arranged opposite to the first capacitor electrode, with a gap formed between the first capacitor electrode and the second capacitor electrode;

[0010] a control module, which is in communication with the first capacitor electrode and the second capacitor electrode, and is capable of determining the temperature of the inner tank according to a change in capacitance between the first capacitor electrode and the second capacitor electrode;

[0011] The refrigeration module is connected to the control module for lowering the temperature of the inner tank.

[0012] Beneficial effect: During the execution of the control method for the food crushing device of the embodiment of the present invention, when a large amount of heat is generated due to mechanical friction and motor heating, causing the temperature of the food in the food crushing device to rise, the inner pot can expand or contract due to the heat, thereby causing the capacitance value between the first capacitor electrode and the second capacitor electrode to change. The control module can judge the temperature of the inner pot according to the change in the capacitance value between the first capacitor electrode and the second capacitor electrode, and thus control the refrigeration module to lower the temperature of the inner pot when the temperature in the inner pot is too high, thereby quickly cooling the food in the inner pot.

[0013] When the food crushing device is a meat grinder, cooling the inner pot can also prevent the temperature of the meat from rising, causing protein denaturation, affecting the taste and nutritional value of the meat, especially losing the original gelatinous feeling, which can ensure the taste and nutritional value of the meat.

[0014] Since the first capacitor electrode of the embodiment of the present application is arranged on the outside of the inner pot and the second capacitor electrode is arranged on the inside of the outer shell, during the test process, the first capacitor electrode and the second capacitor electrode do not come into contact with the food in the inner pot, thereby avoiding the first capacitor electrode and the second capacitor electrode from being worn and contaminated, which affects the accuracy of the detection. The first capacitor electrode and the second capacitor electrode of the meat grinder of the embodiment of the present invention can be used in harsh environments such as high temperature and humidity, and will not bring additional cleaning burden to the user.

[0015] Secondly, by capturing the capacitance changes between the first capacitor electrode and the second capacitor electrode, small temperature fluctuations can be quickly captured, which is suitable for dynamic temperature control. The capacitor electrode is not affected by electromagnetic interference during operation, and the material itself has good insulation and stability, which is suitable for use in a meat grinder environment where the motor runs at high speed and the current fluctuation is large.

[0016] Again, the capacitor electrode has a simple structure, low manufacturing cost, and is not easily damaged.

[0017] In an optional embodiment, the inner liner is made of a negative thermal expansion material.

[0018] Beneficial effect: Through such a setting, the inner pot can shrink when heated during the mincing process, and the outer pot can expand when heated, thereby increasing the distance between the inner pot and the outer pot, thereby causing the capacitance value between the first capacitor electrode and the second capacitor electrode to change, and the control module can monitor the temperature of the inner pot.

[0019] The inner liner is made of negative thermal expansion material, which not only increases the change in distance between the inner liner and the outer shell when heated, thereby amplifying the change in capacitance, but also pushes the minced meat at the edge inward when it contracts, thereby reducing the accumulation of meat during the mincing process, thereby ensuring a more even distribution of the meat mince and improving the quality of the final product.

[0020] In an optional embodiment, the thermal expansion coefficient of the negative thermal expansion material is a, 50ppm / °C≤a≤-300ppm / °C; and / or,

[0021] The temperature response range of the negative thermal expansion material is T, 40°C ≤ T ≤ 120°C.

[0022] Beneficial Effect: When the thermal expansion coefficient of the negative thermal expansion material is within the above range, the inner pot will contract as the temperature rises, and the magnitude of this contraction will cause a change in the capacitance value. When the temperature response range of the negative thermal expansion material is within this range, it can precisely cover the temperature rise of the meat during operation in the meat grinder, ensuring that the capacitor electrode can accurately detect the temperature of the inner pot.

[0023] In an optional embodiment, there are multiple first capacitor electrodes, and the multiple first capacitor electrodes are spaced apart and arranged on the outer wall of the inner tank, and each first capacitor electrode is respectively connected to the control module for communication; and / or,

[0024] There are multiple second capacitor electrodes, which are spaced apart on the inner wall of the housing, and each second capacitor electrode is respectively connected to the control module for communication.

[0025] Beneficial effect: Through such a setting, multiple capacitor electrodes can monitor multiple points between the inner tank and the outer shell at the same time, thereby reducing local interference and random errors, and the monitoring results are more accurate. When the connection circuit of any capacitor electrode ages, the other capacitor electrodes can still feedback the capacitance value to the control module, thereby enhancing the reliability of the system.

[0026] In an optional embodiment, the food crushing device further comprises a wringing assembly, which can be extended into the inner container. The initial minimum distance between the inner container and the wringing assembly is d1. During the contraction of the inner container, the maximum reduction in the distance between the inner container and the wringing assembly is Δd. Δd <d1。

[0027] Beneficial effect: Through such an arrangement, it can be ensured that the maximum shrinkage of the inner liner will not cause the inner liner to collide with the twisting assembly.

[0028] In an optional embodiment, the refrigeration module is a semiconductor refrigeration plate; and / or,

[0029] The refrigeration module is arranged between the inner container and the outer shell.

[0030] Beneficial effects: Using semiconductor refrigeration chips to cool the inner tank has the advantages of small size, flexible installation, precise temperature control and timely response.

[0031] In a second aspect, the present invention further provides a method for controlling a food crushing device, the food crushing device comprising:

[0032] liner;

[0033] The outer shell is arranged outside the inner liner, and the thermal expansion coefficients of the inner liner and the outer shell are different;

[0034] A first capacitor electrode is provided on the outer wall of the inner container;

[0035] The second capacitor electrode is provided on the inner wall of the housing and is arranged opposite to the first capacitor electrode, with a gap formed between the first capacitor electrode and the second capacitor electrode;

[0036] Refrigeration module, used to reduce the temperature of the inner tank;

[0037] Control methods include:

[0038] Obtaining a capacitance value between the first capacitor electrode and the second capacitor electrode;

[0039] Get the temperature of the inner tank according to the capacitance value;

[0040] The refrigeration module is controlled to adjust the temperature of the inner tank according to the temperature of the inner tank.

[0041] Beneficial effect: The control method of the food crushing device of the second aspect of the present invention includes or uses the food crushing device of the first aspect of the present invention, and thus has its beneficial effect, namely: during the execution of the control method of the food crushing device of the embodiment of the present invention, when a large amount of heat is generated due to mechanical friction and motor heating, causing the temperature of the food in the food crushing device to rise, the inner pot can expand or contract due to the heat, thereby causing the capacitance value between the first capacitor electrode and the second capacitor electrode to change. The control module can judge the temperature of the inner pot according to the change in the capacitance value between the first capacitor electrode and the second capacitor electrode, thereby controlling the refrigeration module to lower the temperature of the inner pot when the temperature in the inner pot is too high, thereby quickly cooling the food in the inner pot.

[0042] When the food crushing device is a meat grinder, cooling the inner pot can also prevent the temperature of the meat from rising, causing protein denaturation, affecting the taste and nutritional value of the meat, especially losing the original gelatinous feeling, which can ensure the taste and nutritional value of the meat.

[0043] Since the first capacitor electrode of the embodiment of the present application is arranged on the outside of the inner pot and the second capacitor electrode is arranged on the inside of the outer shell, during the test process, the first capacitor electrode and the second capacitor electrode do not come into contact with the food in the inner pot, thereby avoiding the first capacitor electrode and the second capacitor electrode from being worn and contaminated, which affects the accuracy of the detection. The first capacitor electrode and the second capacitor electrode of the meat grinder of the embodiment of the present invention can be used in harsh environments such as high temperature and humidity, and will not bring additional cleaning burden to the user.

[0044] Secondly, by capturing the capacitance changes between the first capacitor electrode and the second capacitor electrode, small temperature fluctuations can be quickly captured, which is suitable for dynamic temperature control. The capacitor electrode is not affected by electromagnetic interference during operation, and the material itself has good insulation and stability, which is suitable for use in a meat grinder environment where the motor runs at high speed and the current fluctuation is large.

[0045] Again, the capacitor electrode has a simple structure, low manufacturing cost, and is not easily damaged.

[0046] In an optional embodiment, controlling the refrigeration module to adjust the temperature of the inner container according to the temperature of the inner container includes:

[0047] Determining whether the capacitance value is less than or equal to a first preset threshold;

[0048] If the capacitance value is less than or equal to the first preset threshold, the refrigeration module is controlled to cool the inner tank.

[0049] Beneficial effect: Through such a setting, when the inner liner shrinks due to the increase in temperature, the distance between the inner liner and the outer shell increases, and the capacitance value between the first capacitor electrode and the second capacitor electrode decreases. If the capacitance value is less than or equal to the first preset threshold value, it means that the temperature has exceeded the safety range. The control module controls the refrigeration module to cool, thereby avoiding the temperature of the meat from rising, causing protein denaturation, affecting the taste and nutritional value of the meat, especially losing the original gelatinous feeling, and being able to ensure the taste and nutritional value of the meat.

[0050] In an optional embodiment, if the capacitance value is greater than or equal to the first preset threshold, after controlling the refrigeration module to cool the inner tank, the method further includes:

[0051] Determining whether the capacitance value is greater than or equal to a second preset threshold, the second preset threshold being greater than the first preset threshold;

[0052] If the capacitance value is greater than or equal to the second preset threshold, the cooling module stops cooling.

[0053] Beneficial effect: Through such a setting, when it is detected that the capacitance value returns to the second preset threshold value, it indicates that the temperature of the inner tank has been effectively controlled, and the control module controls the refrigeration module to stop refrigeration.

[0054] In an optional embodiment, controlling the refrigeration module to adjust the temperature of the inner container according to the temperature of the inner container includes:

[0055] If the capacitance value is greater than the first preset threshold, the cooling module does not perform the cooling operation.

[0056] Beneficial effect: When the capacitance value is greater than the first preset threshold value, the temperature has not exceeded the safety range, and the refrigeration module does not perform the refrigeration operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0058] Figure 1 is a schematic diagram of a food crushing device according to an embodiment of the present invention;

[0059] Figure 2 The outer shell, inner container and crushing assembly of a food crushing device according to an embodiment of the present invention;

[0060] Figure 3 The inner liner material and the first capacitor electrode of the inner liner of a food crushing device according to an embodiment of the present invention;

[0061] Figure 4 The shell material of the shell of a food crushing device according to an embodiment of the present invention and the second capacitor electrode;

[0062] Figure 5 Schematic diagram of the connection relationship between a first capacitor electrode, a second capacitor electrode, and a control module of a food crushing device according to an embodiment of the present invention;

[0063] Figure 6 is a flow chart of a method for controlling a food crushing device according to an embodiment of the present invention;

[0064] Figure 7 The figure is a flow chart of a method for controlling a food crushing device according to an embodiment of the present invention.

[0065] Description of reference numerals:

[0066] 1. Inner liner;

[0067] 2. Shell;

[0068] 3. The first capacitor electrode;

[0069] 4. The second capacitor electrode;

[0070] 5. Control circuit;

[0071] 6. Refrigeration module;

[0072] 7. Host;

[0073] 8. Rotation source;

[0074] 9. Twist the components. DETAILED DESCRIPTION

[0075] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0076] The following combination Figures 1 to 5 , describing embodiments of the present invention.

[0077] According to an embodiment of the present invention, on the one hand, a food crushing device is provided, including an inner container 1, an outer shell 2, a first capacitor electrode 3, a second capacitor electrode 4, a control module and a refrigeration module 6.

[0078] The outer shell 2 is disposed outside the inner liner 1. The first capacitor electrode 3 is disposed outside the inner liner 1. The second capacitor electrode 4 is disposed inside the outer shell 2 and is arranged opposite the first capacitor electrode 3, with a gap formed between the first capacitor electrode 3 and the second capacitor electrode 4. The control module is communicatively connected to the first capacitor electrode 3 and the second capacitor electrode 4, and can determine the temperature of the inner liner 1 based on the capacitance change between the first capacitor electrode 3 and the second capacitor electrode 4. The cooling module 6 is communicatively connected to the control module and is used to reduce the temperature of the inner liner 1.

[0079] During the execution of the control method for the food crushing device of an embodiment of the present invention, when a large amount of heat is generated due to mechanical friction and motor heating, causing the temperature of the food in the food crushing device to rise, the inner pot 1 can expand or contract due to the heat, thereby causing the capacitance value between the first capacitor electrode 3 and the second capacitor electrode 4 to change. The control module can judge the temperature of the inner pot 1 based on the change in the capacitance value between the first capacitor electrode 3 and the second capacitor electrode 4, and thus control the refrigeration module 6 to lower the temperature of the inner pot 1 when the temperature in the inner pot 1 is too high, thereby quickly cooling the food in the inner pot 1.

[0080] When the food crushing device is a meat grinder, cooling the inner pot 1 can also prevent the temperature of the meat from rising, causing protein denaturation, which will affect the taste and nutritional value of the meat, especially the loss of the original gelatinous texture, and can ensure the taste and nutritional value of the meat.

[0081] Since the first capacitor electrode 3 of the embodiment of the present application is arranged on the outside of the inner pot 1 and the second capacitor electrode 4 is arranged on the inside of the outer shell 2, during the test process, the first capacitor electrode 3 and the second capacitor electrode 4 do not come into contact with the food in the inner pot 1, thereby avoiding the first capacitor electrode 3 and the second capacitor electrode 4 from being worn and contaminated, which affects the accuracy of the detection. The first capacitor electrode 3 and the second capacitor electrode 4 of the meat grinder of the embodiment of the present invention can be used in harsh environments such as high temperature and humidity, and will not bring additional cleaning burden to the user.

[0082] Secondly, by capturing the capacitance changes between the first capacitor electrode 3 and the second capacitor electrode 4, small temperature fluctuations can be quickly captured, which is suitable for dynamic temperature control. The capacitor electrode is not affected by electromagnetic interference during operation, and the material itself has good insulation and stability, which is suitable for use in a meat grinder environment where the motor runs at high speed and the current fluctuation is large.

[0083] Again, the capacitor electrode has a simple structure, low manufacturing cost, and is not easily damaged.

[0084] The capacitance between the first capacitor electrode 3 and the second capacitor electrode 4 is calculated as follows:

[0085]

[0086] Where C is the capacitance value;

[0087] ε γ is the relative dielectric constant;

[0088] ε0 is the dielectric constant of vacuum;

[0089] A is the area facing each other between the first capacitor electrode 3 and the second capacitor electrode 4;

[0090] d is the distance between the first capacitor electrode 3 and the second capacitor electrode 4.

[0091] In one embodiment, in order to enable the control module to determine the temperature of the inner container 1 based on the capacitance value, the control module stores a corresponding relationship between the capacitance value and the temperature of the inner container 1 .

[0092] The corresponding relationship between the capacitance value and the temperature can be obtained through experiments.

[0093] For example, in an optional embodiment, the correspondence between the capacitance value and the temperature may be obtained by the following experiment: in a laboratory environment, the inner tank 1 is heated to a series of temperatures, such as 20° C., 30° C., 50° C., 80° C., etc., and the capacitance value at each temperature is measured synchronously;

[0094] With temperature as the horizontal axis and capacitance value as the vertical axis, a CT calibration curve is drawn (or fitted into a mathematical formula, such as a linear relationship C=k·T+b, where k and b are calibration coefficients).

[0095] In one embodiment, the control module may include a programmable logic control component (such as a PLC or CPU), a memory, and electronic components connected to the programmable logic control component, etc., which are well known to those skilled in the art and will not be described in detail here.

[0096] In one embodiment, the inner liner 1 is made of a negative thermal expansion material.

[0097] Through such a setting, the inner pot 1 can shrink when heated during the mincing process, while the outer shell 2 can expand when heated, thereby increasing the distance between the inner pot 1 and the outer shell 2, thereby causing the capacitance value between the first capacitor electrode 3 and the second capacitor electrode 4 to change, and the control module can monitor the temperature of the inner pot 1.

[0098] The inner liner 1 is made of negative thermal expansion material, which not only increases the change in distance between the inner liner 1 and the outer shell 2 when heated, thereby amplifying the capacitance change value and making temperature detection more sensitive, but also pushes the minced meat at the edge inward when shrinking, thereby reducing the accumulation of meat during the mincing process, thereby ensuring a more even distribution of the minced meat and improving the quality of the final product.

[0099] As a convertible embodiment, the inner liner 1 can also be made of a thermal expansion material, and the thermal expansion coefficients of the inner liner 1 and the outer shell 2 are different. When the food crushing device is working and causes a large amount of heat to be generated in the inner liner 1, the expansion degrees of the inner liner 1 and the outer shell 2 are different, thereby causing the capacitance value between the first capacitor electrode 3 and the second capacitor electrode 4 to change.

[0100] As another convertible embodiment, the thermal expansion coefficients of the inner liner 1 and the outer shell 2 are the same. Since the heat is mainly generated in the inner liner 1 during the operation of the food crushing device, the temperatures of the inner liner 1 and the outer shell 2 are different. Therefore, the expansion degrees of the inner liner 1 and the outer shell 2 are different, which can also cause the capacitance value between the first capacitor electrode 3 and the second capacitor electrode 4 to change.

[0101] In one embodiment, the thermal expansion coefficient of the negative thermal expansion material is a, 50 ppm / °C ≤ a ≤ -300 ppm / °C; and / or,

[0102] The temperature response range of the negative thermal expansion material is T, 40°C ≤ T ≤ 120°C.

[0103] When the thermal expansion coefficient of the negative thermal expansion material is within this range, the inner liner 1 will contract as the temperature rises, and the magnitude of this contraction will cause a change in the capacitance value. When the temperature response range of the negative thermal expansion material is within this range, it can precisely cover the temperature rise of the meat during operation in the meat grinder, ensuring that the capacitor electrode can accurately detect the temperature of the inner liner 1.

[0104] In one embodiment, the inner liner 1 is preferably but not limited to being made of negative thermal expansion materials such as metal oxides and titanium-based alloys.

[0105] In one embodiment, Figure 3 and Figure 4 As shown, there are multiple first capacitor electrodes 3, and the multiple first capacitor electrodes 3 are spaced apart on the outer wall of the inner tank 1, and each first capacitor electrode 3 is respectively connected to the control module for communication; and / or,

[0106] There are multiple second capacitor electrodes 4 , which are spaced apart on the inner wall of the housing 2 , and each second capacitor electrode 4 is respectively connected to the control module for communication.

[0107] Through such a setting, multiple capacitor electrodes can monitor multiple points between the inner tank 1 and the outer shell 2 at the same time, thereby reducing local interference and random errors, and the monitoring results are more accurate. When the connection circuit of any capacitor electrode ages, the other capacitor electrodes can still feedback the capacitance value to the control module, thereby enhancing the reliability of the system.

[0108] In one embodiment, the initial minimum distance between the first capacitor electrode 3 and the second capacitor electrode 4 arranged opposite to each other is d, d>0; and / or,

[0109] The maximum contraction distance between the first capacitor electrode 3 and the second capacitor electrode 4 is Δd, and the initial minimum distance between the inner container 1 and the twisting component 9 is d1. Δd <d1。

[0110] When d>0, it can be ensured that the first capacitor electrode 3 and the second capacitor electrode 4 are not in contact, and the initial value of the capacitance is valid.

[0111] The initial minimum distance refers to the minimum distance between the first capacitor electrode 3 and the second capacitor electrode 4 at room temperature.

[0112] In one embodiment, the food crushing device further comprises a wringing assembly 9, which can be extended into the inner container 1. The initial minimum distance between the inner container 1 and the wringing assembly 9 is d1. During the contraction of the inner container 1, the maximum reduction in the distance between the inner container 1 and the wringing assembly 9 is Δd. Δd <d1。

[0113] By such an arrangement, it can be ensured that the maximum shrinkage of the inner liner 1 will not cause the inner liner 1 to collide with the twisting assembly 9 .

[0114] In an optional embodiment, the refrigeration module 6 is a semiconductor refrigeration plate.

[0115] The use of semiconductor refrigeration chips to cool the inner tank 1 has the advantages of being compact, flexible in installation, precise in temperature control, and timely in response.

[0116] As a convertible implementation, in an embodiment not shown in the drawings, the refrigeration module 6 can also be selected as a water cooling module or an air cooling module.

[0117] The refrigeration module 6 is disposed between the inner container 1 and the outer shell 2 .

[0118] In one embodiment, Figure 1 As shown, the food crushing device further includes a main unit 7 , a rotation source 8 and a twisting assembly 9 .

[0119] The rotation source 8 is disposed in the main unit 7 . The twisting assembly 9 can extend into the inner container 1 and rotate under the action of the rotation source 8 .

[0120] The twisting assembly 9 can crush the food in the inner pot 1 under the action of the rotation source 8. The outer shell 2 can not only be used to support the food crushing device, but also protect the inner pot 1 and other internal components and prevent heat from being transferred to the outside.

[0121] In one embodiment, the inner pot 1 and the outer shell 2 are sealed and connected by a sealing structure, which can prevent external debris from entering between the outer shell 2 and the inner pot 1 and causing changes in the capacitance value, and protect the capacitor electrodes to maintain the stability of the food crushing device.

[0122] The sealing structure preferably includes, but is not limited to, a sealing ring sandwiched between the inner container 1 and the outer shell 2 .

[0123] In one embodiment, the reamer assembly 9 includes a rotating shaft and a reamer connected to the rotating shaft.

[0124] As an alternative implementation, in an embodiment not shown in the drawings, the wringer assembly 9 may also optionally include a rotating shaft and a stirring paddle connected to the rotating shaft.

[0125] In one embodiment, the rotation source 8 may be a device capable of outputting rotation, such as an electric motor, an engine, a hydraulic motor, or a combination of one of them and a speed reducer.

[0126] In one embodiment, the food crushing device is a meat grinder.

[0127] As a convertible implementation, in an embodiment not shown in the drawings, the food crushing device may also be other devices capable of crushing food, such as a juicer, a soy milk maker or a food processor.

[0128] According to an embodiment of the present invention, on the other hand, a control method of a food crushing device is provided. The food crushing device includes an inner container 1, an outer shell 2, a first capacitor electrode 3, a second capacitor electrode 4 and a refrigeration module 6.

[0129] The outer shell 2 is disposed outside the inner liner 1, and the inner liner 1 and the outer shell 2 have different thermal expansion coefficients. A first capacitor electrode 3 is disposed on the outer wall of the inner liner 1. A second capacitor electrode 4 is disposed on the inner wall of the outer shell 2 and is opposite to the first capacitor electrode 3. A gap is formed between the first capacitor electrode 3 and the second capacitor electrode 4. A cooling module 6 is used to reduce the temperature of the inner liner 1.

[0130] like Figure 6 As shown, the control method includes step S1, step S2 and step S3.

[0131] Wherein, step S1 includes: obtaining the capacitance value between the first capacitor electrode 3 and the second capacitor electrode 4;

[0132] Step S2 includes: obtaining the temperature of the inner tank 1 according to the capacitance value;

[0133] Step S3 includes: controlling the refrigeration module 6 to adjust the temperature of the inner container 1 according to the temperature of the inner container 1 .

[0134] The control method of the food crushing device of the second aspect of the present invention includes or uses the food crushing device of the first aspect of the present invention, and thus has its beneficial effects, namely: during the execution of the control method of the food crushing device of the embodiment of the present invention, when a large amount of heat is generated due to mechanical friction and motor heating, causing the temperature of the food in the food crushing device to rise, the inner pot 1 can expand or contract due to the heat, thereby causing the capacitance value between the first capacitor electrode 3 and the second capacitor electrode 4 to change. The control module can judge the temperature of the inner pot 1 according to the change in the capacitance value between the first capacitor electrode 3 and the second capacitor electrode 4, thereby controlling the refrigeration module 6 to lower the temperature of the inner pot 1 when the temperature in the inner pot 1 is too high, thereby quickly cooling the food in the inner pot 1.

[0135] When the food crushing device is a meat grinder, cooling the inner pot 1 can also prevent the temperature of the meat from rising, causing protein denaturation, affecting the taste and nutritional value of the meat, especially losing the original gelatinous texture, and can ensure the taste and nutritional value of the meat.

[0136] Since the first capacitor electrode 3 of the embodiment of the present application is arranged on the outside of the inner pot 1 and the second capacitor electrode 4 is arranged on the inside of the outer shell 2, during the test process, the first capacitor electrode 3 and the second capacitor electrode 4 do not come into contact with the food in the inner pot 1, thereby avoiding the first capacitor electrode 3 and the second capacitor electrode 4 from being worn and contaminated, which affects the accuracy of the detection. The first capacitor electrode 3 and the second capacitor electrode 4 of the meat grinder of the embodiment of the present invention can be used in harsh environments such as high temperature and humidity, and will not bring additional cleaning burden to the user.

[0137] Secondly, by capturing the capacitance changes between the first capacitor electrode 3 and the second capacitor electrode 4, small temperature fluctuations can be quickly captured, which is suitable for dynamic temperature control. The capacitor electrode is not affected by electromagnetic interference during operation, and the material itself has good insulation and stability, which is suitable for use in a meat grinder environment where the motor runs at high speed and the current fluctuation is large.

[0138] Again, the capacitor electrode has a simple structure, low manufacturing cost, and is not easily damaged.

[0139] In one embodiment, Figure 7 As shown, step S3 includes step S301 and step S302.

[0140] Wherein, step S301 includes: determining whether the capacitance value is less than or equal to a first preset threshold;

[0141] Step S302 includes: if the capacitance value is less than or equal to the first preset threshold, controlling the refrigeration module 6 to cool the inner tank 1 .

[0142] Through such a setting, when the inner liner 1 shrinks due to the increase in temperature, the distance between the inner liner 1 and the outer shell 2 increases, and the capacitance value between the first capacitor electrode 3 and the second capacitor electrode 4 decreases. If the capacitance value is less than or equal to the first preset threshold value, it means that the temperature has exceeded the safety range. The control module controls the refrigeration module 6 to refrigerate, thereby avoiding the temperature rise of the meat, causing protein denaturation, affecting the taste and nutritional value of the meat, especially losing the original gelatinous feeling, and being able to ensure the taste and nutritional value of the meat.

[0143] In one embodiment, the initial capacitance value is C, the first preset threshold is C0, and 80% C≤C0≤95%C.

[0144] In one embodiment, after step S302, step S303 and step S304 are further included.

[0145] Step S303: determining whether the capacitance value is greater than or equal to a second preset threshold, and whether the second preset threshold is greater than the first preset threshold;

[0146] Step S304: If the capacitance value is greater than or equal to the second preset threshold, the cooling module 6 stops cooling.

[0147] By such setting, when it is detected that the capacitance value recovers to the second preset threshold value, it indicates that the temperature of the inner tank 1 has been effectively controlled, and the control module controls the refrigeration module 6 to stop refrigeration.

[0148] In one embodiment, the second preset threshold is C1, 100%C≤C1≤115%C.

[0149] In one embodiment, step S3 further includes step S305;

[0150] Step S305 includes: if the capacitance value is greater than the first preset threshold, the cooling module 6 does not perform the cooling operation.

[0151] When the capacitance value is greater than the first preset threshold, the temperature has not exceeded the safety range, and the cooling module 6 does not perform the cooling operation.

[0152] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A food crushing device, characterized in that: include: Liner (1); An outer shell (2) is arranged outside the inner container (1); A first capacitor electrode (3) is provided on the outside of the inner container (1); A second capacitor electrode (4) is provided on the inner side of the housing (2) and is arranged opposite to the first capacitor electrode (3), with a gap formed between the first capacitor electrode (3) and the second capacitor electrode (4); a control module, which is in communication connection with the first capacitor electrode (3) and the second capacitor electrode (4), and is capable of judging the temperature of the inner tank (1) based on a change in capacitance between the first capacitor electrode (3) and the second capacitor electrode (4); A refrigeration module (6) is in communication with the control module and is used to reduce the temperature of the inner container (1).

2. The food crushing device according to claim 1, characterized in that The inner container (1) is made of negative thermal expansion material.

3. The food crushing device according to claim 2, characterized in that: The thermal expansion coefficient of the negative thermal expansion material is a, 50ppm / °C≤a≤-300ppm / °C; and / or, The temperature response range of the negative thermal expansion material is T, 40°C ≤ T ≤ 120°C.

4. The food crushing device according to any one of claims 1 to 3, characterized in that: There are a plurality of first capacitor electrodes (3), and the plurality of first capacitor electrodes (3) are arranged at intervals on the outer wall of the inner container (1), and each first capacitor electrode (3) is respectively communicatively connected to the control module; There are a plurality of second capacitor electrodes (4), which are arranged at intervals on the inner wall of the housing (2), and each second capacitor electrode (4) is respectively communicatively connected to the control module.

5. The food crushing device according to claim 4, characterized in that: The invention also includes a twisting assembly (9), which can be extended into the inner container (1), and the initial minimum distance between the inner container (1) and the twisting assembly (9) is d1. During the contraction process of the inner container (1), the maximum reduction amount of the distance between the inner container (1) and the twisting assembly (9) is Δd, Δd <d1。 6. The food crushing device according to any one of claims 1 to 3, characterized in that: The refrigeration module (6) is a semiconductor refrigeration plate; and / or, The refrigeration module (6) is arranged between the inner container (1) and the outer shell (2).

7. A method for controlling a food crushing device, characterized in that: The food crushing device comprises: Liner (1); An outer shell (2) is arranged outside the inner liner (1), and the inner liner (1) and the outer shell (2) have different thermal expansion coefficients; A first capacitor electrode (3) is provided on the outer wall of the inner container (1); A second capacitor electrode (4) is provided on the inner wall of the housing (2) and is arranged opposite to the first capacitor electrode (3), with a gap formed between the first capacitor electrode (3) and the second capacitor electrode (4); A refrigeration module (6) for reducing the temperature of the inner container (1); The control method includes: Obtaining a capacitance value between the first capacitor electrode (3) and the second capacitor electrode (4); Obtaining the temperature of the inner container (1) according to the capacitance value; The refrigeration module (6) is controlled according to the temperature of the inner container (1) to adjust the temperature of the inner container (1).

8. The control method of the food crushing device according to claim 7, characterized in that: The step of controlling the refrigeration module (6) to adjust the temperature of the inner container (1) according to the temperature of the inner container (1) comprises: Determining whether the capacitance value is less than or equal to a first preset threshold; If the capacitance value is less than or equal to a first preset threshold value, the refrigeration module (6) is controlled to cool the inner container (1).

9. The control method of the food crushing device according to claim 8, characterized in that: If the capacitance value is greater than or equal to a first preset threshold, after controlling the refrigeration module (6) to cool the inner container (1), the method further includes: Determining whether the capacitance value is greater than or equal to a second preset threshold, the second preset threshold being greater than the first preset threshold; If the capacitance value is greater than or equal to a second preset threshold, the refrigeration module (6) stops refrigeration.

10. The control method of the food crushing device according to claim 8, characterized in that: The step of controlling the refrigeration module (6) to adjust the temperature of the inner container (1) according to the temperature of the inner container (1) comprises: If the capacitance value is greater than the first preset threshold, the refrigeration module (6) does not perform a refrigeration operation.

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