Food material extraction method and extraction appliance

Abstract

The invention provides a food material extraction method and an extraction appliance, and relates to the technical field of food material extraction. And the pulse electric field control module is controlled to apply a voltage signal with the target electric field intensity between the first electrode and the second electrode, so that the extractable food materials and liquid in the extraction cavity are located in the target electric field between the first electrode and the second electrode. The electric field between the first electrode and the second electrode generates a magnetic field, the extractable food material is alternately acted by the electric field and the magnetic field, so that the cell membrane of the extractable food material is damaged, the permeability of the cell membrane is increased, substances in the cell membrane easily flow into liquid, and substances outside the cell membrane easily permeate into the cell membrane; therefore, the water absorption speed of the food materials and the material extraction speed are greatly improved. The temperature value of the temperature sensor is obtained, the voltage signal is controlled to be turned off and turned on according to the temperature value of the temperature sensor, so that the temperature value of the extraction cavity is within the preset temperature interval, and substances of extracted food materials can be kept to have good taste and flavor.

Description

Technical Field

[0001] The present application relates to the technical field of food extraction, and in particular to a food extraction method and an extraction device. Background Art

[0002] The process of cold extraction of ingredients refers to placing extractable ingredients (such as tea leaves) in cold water and slowly soaking them. In this process, the permeability of the extractable ingredients is gradually activated, and the aroma and taste of the extractable ingredients can be gradually released, so as to achieve low-temperature extraction of the extractable ingredients and maintain a good taste and flavor. However, the above extraction process takes a long time, often requiring 8-12 hours to complete the extraction, and is inefficient. Summary of the invention

[0003] The present application provides a food extraction method and an extraction device, which are used to solve the problem of long time required for food extraction and low efficiency in the prior art.

[0004] In a first aspect, the present application provides a food extraction method, which is applied to an extraction device, wherein the extraction device includes a pulse electric field control module, an extraction chamber, a first electrode, a second electrode, and a temperature sensor, wherein the first electrode and the second electrode are arranged in the extraction chamber with a relative interval, and the temperature sensor is arranged in the extraction chamber, and the pulse electric field control module is electrically connected to the first electrode, the second electrode, and the temperature sensor, respectively. The method provided by the present application includes:

[0005] Controlling the pulse electric field control module to apply a voltage signal of a target electric field strength between the first electrode and the second electrode, so that the extractable food and liquid in the extraction chamber are in the target electric field between the first electrode and the second electrode;

[0006] Obtaining a temperature value of a temperature sensor, and controlling the closing and opening of a voltage signal according to the temperature value of the temperature sensor, so that the temperature value in the extraction chamber is within a preset temperature range;

[0007] When it is determined that the preset extraction stop condition is met, the application of the voltage signal to the first electrode and the second electrode is stopped.

[0008] In a possible implementation, when it is determined that a preset extraction stop condition is met, controlling to stop applying a voltage signal to the first electrode and the second electrode includes:

[0009] The pulse electric field control module detects the voltage difference between the first electrode and the second electrode and the current value flowing through the extractable food and liquid between the first electrode and the second electrode;

[0010] Determine the conductivity of the extractable food and liquid based on the proportional relationship between the voltage difference and the current value;

[0011] When the conductivity is greater than or equal to the set conductivity threshold, the control stops applying the voltage signal to the first electrode and the second electrode.

[0012] In a possible implementation manner, the conductivity threshold value ranges from 0.0025 to 0.01 S / cm.

[0013] In a possible implementation, when it is determined that a preset extraction stop condition is met, controlling to stop applying a voltage signal to the first electrode and the second electrode includes:

[0014] The pulse electric field control module starts timing when applying a voltage signal to the first electrode and the second electrode;

[0015] When the timing time is longer than the set extraction time, the control stops applying the voltage signal to the first electrode and the second electrode.

[0016] In a possible implementation, the set extraction time ranges from 1 min to 5 min.

[0017] In a possible implementation, controlling the voltage signal to be turned off and on according to the temperature value of the temperature sensor so that the temperature value of the temperature sensor is within a preset temperature range includes:

[0018] The pulse electric field control module stops applying the voltage signal when the temperature value of the temperature sensor is higher than the upper temperature limit of the preset temperature range;

[0019] When the temperature value of the temperature sensor is lower than the lower limit temperature value of the preset temperature interval, an operation of resuming the application of the voltage signal is performed.

[0020] In a possible implementation, the extractable food material is tea leaves, the extraction device further comprises a refrigeration module in contact with the extraction chamber, the refrigeration module is electrically connected to the pulse electric field control module, and after the pulse electric field control module controls the step of applying a voltage signal of a target electric field strength between the first electrode and the second electrode, the method provided by the present application further comprises:

[0021] The pulse electric field control module controls the refrigeration module to start refrigerating the extraction chamber;

[0022] When it is determined that the temperature value of the temperature sensor is lower than a set temperature threshold or the working time of the refrigeration module is longer than a set time threshold, the refrigeration module is controlled to stop refrigeration.

[0023] In a possible implementation, the step of the pulse electric field control module controlling the refrigeration module to start refrigerating the extraction chamber includes:

[0024] When the pulse electric field control module stops applying the voltage signal, the refrigeration module is controlled to start cooling the extraction chamber; or,

[0025] Based on the pulse electric field control module applying a voltage signal, the pulse electric field control module detects the voltage difference between the first electrode and the second electrode and the current value passing through the extractable food and liquid between the first electrode and the second electrode;

[0026] When the ratio between the current value and the voltage difference is greater than or equal to a preset threshold, the refrigeration module is controlled to start refrigerating the extraction chamber.

[0027] In a possible implementation, the step of controlling the pulse electric field control module to apply a voltage signal of a target electric field strength between the first electrode and the second electrode includes:

[0028] An electrical signal is generated according to the electrical connection between the pulse electric field control module and the first electrode or the second electrode, and the pulse electric field control module is controlled to apply a voltage signal of a target electric field strength between the first electrode and the second electrode, wherein the voltage signal is output in a pulse, the pulse duty cycle is less than 0.025, the maximum voltage is less than 2000V, and the maximum current is less than 50A.

[0029] In the second aspect, the present application also provides an extraction device, including a pulsed electric field control module, an extraction chamber, a first electrode, a second electrode and a temperature sensor, the first electrode and the second electrode are arranged in the extraction chamber with relative intervals, the temperature sensor is arranged in the extraction chamber, the pulsed electric field control module is electrically connected to the first electrode, the second electrode and the temperature sensor, respectively, and the pulsed electric field control module is used to execute the method provided in the first aspect of the present application.

[0030] In a possible implementation manner, the first electrode and the second electrode are arranged relatively spaced apart along the left and right sides, or the upper and lower sides, of the extraction chamber.

[0031] In a possible implementation, the first electrode and the second electrode are arranged relatively spaced apart along upper and lower sides of the extraction chamber, including:

[0032] The first electrode is connected to the top of the extraction chamber through a retractable rod, a plurality of through holes are arranged on the surface of the first electrode, and the second electrode is arranged at the bottom of the extraction chamber. The method provided by the present application also includes:

[0033] During the process of applying the voltage signal, if the pulse electric field control module detects that there is no electric signal between the first electrode and the second electrode, it controls the retractable rod to extend a preset length to drive the first electrode to move downward until an electric signal is detected between the first electrode and the second electrode.

[0034] In a third aspect, the present application further provides a storage medium on which a computer program is stored, wherein the computer program, when executed by a processor, implements the method provided in the first aspect of the present application.

[0035] The present application provides a food extraction method and an extraction device, which controls a pulse electric field control module to apply a voltage signal of a target electric field strength between a first electrode and a second electrode, so that the extractable food and liquid in the extraction chamber are in the target electric field between the first electrode and the second electrode. The electric field between the first electrode and the second electrode generates a magnetic field, and the extractable food is alternately acted upon by the electric field and the magnetic field, so that the cell membrane of the extractable food is destroyed, thereby increasing the permeability of the cell membrane, and the substances in the cell membrane are easily flowed out into the liquid, and the substances outside the membrane are easily infiltrated into the cell membrane, thereby greatly improving the water absorption speed of the food and the material extraction speed.

[0036] Secondly, the temperature value of the temperature sensor is obtained, and according to the temperature value of the temperature sensor, the closing and opening of the voltage signal are controlled to make the temperature value of the temperature sensor within a preset temperature range. When the extractable food and liquid are within the preset temperature range, the substances of the extracted food can be kept with good taste and flavor. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0038] Figure 1 One of the structural schematic diagrams of the extraction device provided in the embodiment of the present application;

[0039] Figure 2 One of the flow charts of the food extraction method provided in the embodiment of the present application;

[0040] Figure 3 The second flowchart of the food extraction method provided in the embodiment of the present application;

[0041] Figure 4 Flow chart 3 of the food extraction method provided in the embodiment of the present application;

[0042] Figure 5 The second structural schematic diagram of the extraction device provided in the embodiment of the present application;

[0043] Figure 6 This is a functional block diagram of the food extraction device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0045] Various structural schematic diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may further design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0046] In the context of the present disclosure, when a layer / element is referred to as being "on" another layer / element, the layer / element may be directly on the other layer / element or an intervening layer / element may exist therebetween. In addition, if a layer / element is "on" another layer / element in one orientation, the layer / element may be "below" the other layer / element when the orientation is reversed.

[0047] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0048] The present application embodiment provides a food extraction method, which is applied to an extraction device 100. Figure 1 As shown, the extraction device 100 includes a pulse electric field control module 101, an extraction chamber 102, a first electrode 103, a second electrode 104 and a temperature sensor 107. The first electrode 103 and the second electrode 104 are arranged in the extraction chamber 102 at relative intervals, and the temperature sensor 107 is arranged in the extraction chamber 102. The pulse electric field control module 101 is electrically connected to the first electrode 103, the second electrode 104 and the temperature sensor 107, respectively. The first electrode 103 can be a positive electrode, and the second electrode 104 can be a negative electrode, or the second electrode 104 can be a positive electrode and the first electrode 103 can be a negative electrode. The top of the extraction chamber 102 has an opening, and extractable food materials and water can be put into and taken out of the extraction chamber 102 through the opening. Exemplarily, the extractable food materials can include but are not limited to tea leaves, scented tea, coffee beans or Chinese medicinal materials, etc., which are not limited here. As Figure 2 As shown, the method provided in the embodiment of the present application includes:

[0049] S201 : controlling the pulse electric field control module 101 to apply a voltage signal of a target electric field strength between the first electrode 103 and the second electrode 104 , so that the extractable food and liquid in the extraction chamber 102 are in the target electric field between the first electrode 103 and the second electrode 104 .

[0050] Among them, the voltage signal is less than 2000V, the current flowing through the extractable food and liquid between the first electrode 103 and the second electrode 104 is less than 50A, and the duty cycle of the voltage signal is less than 0.025 to prevent the target electric field strength of the extractable food and liquid from being too large.

[0051] Specifically, the pulsed electric field control module applies a voltage signal of a target electric field strength to the extractable food and liquid, and uses a higher voltage pulsed electric field to perform a brief and intense electric shock on the cell membrane on the surface of the extractable food, thereby inducing the formation of micropores (electroporation) in the cell membrane through the electric field. These micropores allow internal components to be more easily released into the external solution, which is more conducive to increasing the permeability of the cell membrane and promoting the dissolution and extraction of the target components to be extracted.

[0052] It can be understood that when a voltage signal is applied to the first electrode 103 and the second electrode 104, the first electrode 103, the food and water, and the second electrode 104 are connected to form a loop, and the food and water have resistance and can generate heat by themselves, so that the temperature of the food and water will increase.

[0053] S202: Acquire the temperature value of the temperature sensor 107, and control the closing and opening of the voltage signal according to the temperature value of the temperature sensor 107, so that the temperature value in the extraction chamber 102 is within a preset temperature range.

[0054] Exemplarily, the temperature range may be 30 degrees Celsius to 45 degrees Celsius.

[0055] Further, S202 can be specifically implemented as follows: when the temperature value of the temperature sensor 107 is higher than the upper temperature limit of the preset temperature range (such as 45 degrees Celsius), the pulse electric field control module 101 stops applying the voltage signal; in this way, the flavor deterioration caused by excessive temperature can be avoided. When the temperature value of the temperature sensor 107 is lower than the lower temperature limit of the preset temperature range (such as 30 degrees Celsius), the operation of resuming applying the voltage signal is performed. In this way, a good extraction temperature environment can be maintained in the extraction chamber 102 to ensure extraction efficiency.

[0056] S203 : When it is determined that the preset extraction stop condition is met, control to stop applying the voltage signal to the first electrode 103 and the second electrode 104 .

[0057] Specifically, the specific implementation methods of S203 include but are not limited to the following two:

[0058] like Figure 3 As shown, the first method includes S301-S303, specifically,

[0059] S301: The pulse electric field control module 101 detects the voltage difference between the first electrode 103 and the second electrode 104 and the current passing through the first electrode 103 and the second electrode 104 to extract the food and liquid.

[0060] S302: Determine the conductivity of the extractable food and liquid according to the voltage difference and the current value.

[0061] For example, the conductivity of the extractable food and liquid can be determined according to the formula a=I / U, where a is the conductivity, I is the current value passing through the extractable food and liquid between the first electrode 103 and the second electrode 104, and U is the voltage difference between the first electrode 103 and the second electrode 104.

[0062] Exemplarily, the method for measuring the target electric field strength may include: obtaining the voltage difference |V1-V2| and the shortest distance d between the first electrode 103 and the second electrode 104; dividing the voltage difference |V1-V2| by the shortest distance d to obtain the target electric field strength E. For example, the electric field strength E = (|V1-V2|) / d, kV), and the pulse parameters of the voltage signal are measured by an oscilloscope, wherein the periodic pulse voltage signal includes a pulse frequency of F (frequency is the number of working times per minute, Hz) and a pulse width of W (pulse width is the duration of each working time, μs).

[0063] Among them, the current value I of the target electric field E depends on factors such as load resistance, output voltage, output current and pulse width. The output current of the pulse power supply is usually not constant, but pulsed, that is, it is in the form of a current pulse. When the pulse width W is constant, the current value I of the target electric field E depends on the output voltage and load resistance. When the load resistance is small, the current is large; when the load resistance is large, the current is small, and the current value passing through the extractable food and liquid, its load resistance depends on the equivalent resistance between the first electrode 103 and the second electrode 104. Similarly, the voltage difference and current value between the target electric fields can be measured by an oscilloscope to determine the conductivity of the extractable food and liquid.

[0064] S303 : when the conductivity is greater than or equal to the set conductivity threshold, controlling to stop applying the voltage signal to the first electrode 103 and the second electrode 104 .

[0065] When the conductivity is greater than the set conductivity threshold, it means that the extractable food has been fully extracted, and the voltage signal is stopped from being applied to the first electrode 103 and the second electrode 104. In some embodiments, the conductivity threshold is greater than 0.0005, and further, the conductivity threshold has a value range of 0.0025 to 0.01. For example, the conductivity threshold may be 0.0025, 0.005 or 0.01, which is not limited here.

[0066] like Figure 4 As shown, the first method includes S401-S403, specifically,

[0067] S401 : When the pulse electric field control module 101 applies a voltage signal to the first electrode 103 and the second electrode 104 , timing starts.

[0068] S402 : When the timing duration is greater than the set extraction duration, control is performed to stop applying the voltage signal to the first electrode 103 and the second electrode 104 .

[0069] When the timing time is longer than the set extraction time, it indicates that the extractable food has been fully extracted, and the voltage signal is stopped from being applied to the first electrode 103 and the second electrode 104. In some embodiments, the set extraction time ranges from 1 min to 5 min.

[0070] When the extractable food material is tea leaves, the extraction device 100 further includes a cooling module 106 in contact with the extraction chamber 102, and the cooling module 106 is electrically connected to the pulse electric field control module 101. After the above S203, the method provided in the embodiment of the present application further includes:

[0071] The pulse electric field control module 101 controls the refrigeration module 106 to start cooling the extraction chamber 102; when it is determined that the temperature value of the temperature sensor 107 is lower than the set temperature threshold or the working time of the refrigeration module 106 is greater than the set time threshold (0.5min≤set time threshold≤2min), the refrigeration module 106 is controlled to stop cooling.

[0072] For example, the set temperature threshold may be, but is not limited to, 15 degrees Celsius or 10 degrees Celsius, etc., which is not limited here. It can be understood that when the temperature of the extracted tea soup is lower than the set temperature threshold, the flavor and taste are good.

[0073] Furthermore, in some embodiments, when the pulse electric field control module 101 stops applying the voltage signal, the refrigeration module 106 is controlled to start refrigerating the extraction chamber 102. In this way, the substances in the extractable food can be extracted at a higher temperature, thereby improving the extraction efficiency.

[0074] In other embodiments, based on the pulse electric field control module 101 applying a voltage signal, the pulse electric field control module 101 detects the voltage difference between the first electrode 103 and the second electrode 104 and the current passing through the extractable food and liquid between the first electrode 103 and the second electrode 104; when the proportional relationship between the current and the voltage difference is greater than or equal to a preset threshold value (such as 0.0005S / cm), the refrigeration module 106 is controlled to start cooling the extraction chamber 102. The proportional relationship between the current and the voltage difference can be understood as conductivity. When the pulse electric field control module 101 applies a voltage signal and the refrigeration module 106 is turned on, the substances in the extractable food can be quickly extracted and the temperature of the extractable food is ensured not to rise significantly, so that the heat-sensitive nutrients (such as anthocyanins, vitamins, DHA, linolenic acid, etc.) can be better retained.

[0075] In some embodiments, Figure 1 As shown, the first electrode 103 and the second electrode 104 are arranged relatively spaced apart along the left and right sides of the extraction chamber 102 .

[0076] In other embodiments, Figure 5 As shown, the first electrode 103 and the second electrode 104 are arranged at intervals along the upper and lower sides of the extraction chamber 102. Specifically, the extraction device 100 includes a top cover and a retractable rod 105. When the first electrode 103 is arranged on the upper side of the extraction chamber 102 and the second electrode 104 is arranged on the lower side of the extraction chamber 102, when the top cover of the extraction device 100 is not closed, the top cover and the retractable rod 105 are not electrically connected; when the top cover of the extraction device 100 is closed, the first electrode 103 is connected to the top cover of the extraction chamber 102 through the retractable rod 105, so that the top cover and the retractable rod 105 are electrically connected. Furthermore, since the pulse electric field control module 101 is electrically connected to the top cover, the electrical connection between the pulse electric field control module 101 and the first electrode 103 can be achieved. Similarly, when the second electrode 104 is disposed on the upper side of the extraction chamber 102 and the first electrode 103 is disposed on the lower side of the extraction chamber 102, when the top cover of the extraction device 100 is closed, the pulse electric field control module 101 can be electrically connected to the second electrode 104. In this way, the electrical safety of the extraction device 100 can be ensured.

[0077] Furthermore, an electrical signal can be generated based on the electrical connection between the pulse electric field control module 101 and the first electrode 103 or the second electrode 104, and the pulse electric field control module 101 can be controlled to apply a voltage signal of a target electric field strength between the first electrode 103 and the second electrode 104, wherein the voltage signal is output in a pulse, the pulse duty cycle is less than 0.025, the maximum voltage is less than 2000V, and the maximum current is less than 50A.

[0078] Specifically, Figure 5 As shown, the area in the extraction chamber 102 is divided into the upper part of the extraction chamber 102 (located above the height of the first electrode 103) and the lower part of the extraction chamber 102 (located below the height of the first electrode 103) along the vertical direction with the height of the first electrode 103 as the boundary. The following takes the case where the first electrode 103 is arranged above the extraction chamber 102 and the second electrode 104 is arranged below the extraction chamber 102 as an example to explain how to make the extractable food and water in the extraction chamber 102 be in the target electric field between the first electrode 103 and the second electrode 104.

[0079] Furthermore, the surface of the first electrode 103 is provided with a plurality of through holes or the first electrode 103 is meshed, and the liquid in the extraction chamber can enter the top of the extraction chamber through the plurality of through holes or meshed holes, but the extractable food is not allowed to enter the top of the extraction chamber (i.e., the area where the target electric field is not generated), and the extractable food is required to be located below the extraction chamber (i.e., the area where the target electric field is generated) to be in the target electric field. The method provided in the embodiment of the present application also includes: during the process of applying a voltage signal, if the pulse electric field control module 101 detects that there is no current between the first electrode 103 and the second electrode 104, the retractable rod 105 is controlled to extend a preset length to drive the first electrode 103 to move downward until the current is detected between the first electrode 103 and the second electrode 104.

[0080] It can be understood that, since the surface of the first electrode 103 is provided with a plurality of through holes or the first electrode 103 is in a mesh shape, if the pulse electric field control module 101 detects that there is no current between the first electrode 103 and the second electrode 104, it means that the water (which can be used as a conductive medium) in the extraction chamber 102 has not penetrated through the plurality of through holes or meshes to flood the surface of the first electrode 103, resulting in no loop formed between the first electrode 103, the extractable food material and water, and the second electrode 104. In order to make the first electrode 103, the extractable food material and water, and the second electrode 104 conduct to form a loop so as to generate a target electric field strength to destroy the cell wall of the extractable food material, the pulse electric field control module 101 controls the retractable rod 105 to extend a preset length to drive the first electrode 103 to move downward until the pulse electric field control module 101 detects that there is a current between the first electrode 103 and the second electrode 104, which means that the water in the extraction chamber 102 floods the surface of the first electrode 103.

[0081] In addition, when the first electrode 103 is connected to the top of the extraction chamber 102 through the retractable rod 105 and the second electrode 104 is arranged at the bottom of the extraction chamber 102, even if the extractable food (such as tea leaves) cannot float up to the water-free area above the extraction chamber 102 through the multiple through holes or meshes, all the extractable food can be affected by the target electric field strength between the first electrode 103 and the second electrode 104, with high reliability, and a good extraction effect can be achieved.

[0082] In summary, the embodiment of the present application provides a food extraction method, which controls the pulse electric field control module 101 to apply a voltage signal of a target electric field strength between the first electrode 103 and the second electrode 104, so that the extractable food and water in the extraction chamber 102 are in the target electric field between the first electrode 103 and the second electrode 104. The electric field between the first electrode 103 and the second electrode 104 generates a magnetic field, and the extractable food is alternately acted upon by the electric field and the magnetic field, so that the cell membrane of the extractable food is destroyed, and the permeability of the cell membrane is increased, so that the substances in the cell membrane are easy to flow out into the liquid, and the substances outside the membrane are easy to penetrate into the cell membrane, so that the water absorption speed of the food and the material extraction speed are greatly improved.

[0083] The temperature value of the temperature sensor 107 is obtained, and the voltage signal is controlled to be turned on and off according to the temperature value of the temperature sensor 107, so that the temperature value of the extraction chamber 102 is within a preset temperature range. When the extractable food and liquid are within the preset temperature range, the material of the extracted food can be kept with good taste and flavor.

[0084] See also Figure 6 , the present application provides a food extraction device, which is applied to the extraction device 100. It should be noted that the basic principle and technical effect of the food extraction device provided in the embodiment of the present application are the same as those in the above-mentioned embodiment. For the sake of brief description, the parts not mentioned in the embodiment of the present application can refer to the corresponding contents in the above-mentioned embodiment. The extraction device 100 includes a pulsed electric field control module 101, an extraction chamber 102, a first electrode 103, a second electrode 104 and a temperature sensor 107. The first electrode 103 and the second electrode 104 are arranged in the extraction chamber 102 with relative intervals, and the temperature sensor 107 is arranged in the extraction chamber 102. The pulsed electric field control module 101 is electrically connected to the first electrode 103, the second electrode 104 and the temperature sensor 107, respectively. The device provided in the embodiment of the present application includes a voltage application unit, a temperature control unit and a pressure stop control unit, wherein,

[0085] A voltage applying unit, used to control the pulse electric field control module 101 to apply a voltage signal of a target electric field strength between the first electrode 103 and the second electrode 104, so that the extractable food and liquid in the extraction chamber 102 are in the target electric field between the first electrode 103 and the second electrode 104;

[0086] The temperature control unit is used to obtain the temperature value of the temperature sensor 107 and control the closing and opening of the voltage signal according to the temperature value of the temperature sensor 107 so that the temperature value in the extraction chamber 102 is within a preset temperature range.

[0087] The pressure stop control unit is used to control the stop of applying the voltage signal to the first electrode 103 and the second electrode 104 when it is determined that the preset extraction stop condition is met.

[0088] In some embodiments, the pressure stop control unit is specifically used to detect the voltage difference between the first electrode 103 and the second electrode 104 and the current of the extractable food and liquid flowing between the first electrode 103 and the second electrode 104; determine the conductivity of the extractable food and liquid according to the voltage difference and the current; when the conductivity is greater than or equal to the set conductivity threshold, control to stop applying the voltage signal to the first electrode 103 and the second electrode 104. In some embodiments, the conductivity threshold ranges from 0.0025 to 0.01.

[0089] In other embodiments, the pressure stop control unit is specifically used to start timing when a voltage signal is applied to the first electrode 103 and the second electrode 104; when the timing time is longer than the set extraction time, control to stop applying the voltage signal to the first electrode 103 and the second electrode 104. In some embodiments, the set extraction time ranges from 1 min to 5 min.

[0090] In some embodiments, the temperature control unit is specifically used to stop applying the voltage signal when the temperature value of the temperature sensor 107 is higher than the upper temperature limit of the preset temperature range; and to resume applying the voltage signal when the temperature value of the temperature sensor 107 is lower than the lower temperature limit of the preset temperature range.

[0091] In some embodiments, the extractable food material is tea leaves, and the extraction device 100 further includes a refrigeration module 106 in contact with the extraction chamber 102, and the refrigeration module 106 is electrically connected to the pulse electric field control module 101. The device provided in the present application further includes: a refrigeration control unit, which is used to control the refrigeration module 106 to start refrigerating the extraction chamber 102; when it is determined that the temperature value of the temperature sensor 107 is lower than the set temperature threshold or the working time of the refrigeration module 106 is longer than the set time threshold, the refrigeration module 106 is controlled to stop refrigeration.

[0092] In a possible embodiment, the refrigeration control unit is also used to control the refrigeration module 106 to start cooling the extraction chamber when the pulse electric field control module 101 stops applying the voltage signal; or, when the pulse electric field control module 101 applies the voltage signal, the pulse electric field control module 101 detects the voltage difference between the first electrode 103 and the second electrode 104 and the current of the extractable food and liquid flowing between the first electrode 103 and the second electrode 104; when the proportional relationship between the current and the voltage difference is greater than or equal to a preset threshold value, the refrigeration module 106 is controlled to start cooling the extraction chamber.

[0093] In a possible embodiment, the voltage application unit is also used to generate an electrical signal based on the electrical connection between the pulse electric field control module 101 and the first electrode 103 or the second electrode 104, and control the pulse electric field control module 101 to apply a voltage signal of a target electric field strength between the first electrode 103 and the second electrode 104, wherein the voltage signal is output in a pulse, the pulse duty cycle is less than 0.025, the maximum voltage is less than 2000V, and the maximum current is less than 50A. Specifically, it can be directly measured using an oscilloscope.

[0094] Also, see Figure 1 The embodiment of the present application also provides an extraction device 100, including a pulsed electric field control module 101, an extraction chamber 102, a first electrode 103, a second electrode 104 and a temperature sensor 107. The first electrode 103 and the second electrode 104 are arranged in the extraction chamber 102 with relative intervals, and the temperature sensor 107 is arranged in the extraction chamber 102. The pulsed electric field control module 101 is electrically connected to the first electrode 103, the second electrode 104 and the temperature sensor 107 respectively. The pulsed electric field control module 101 is used to execute the method provided in the above embodiment of the present application.

[0095] In addition, an embodiment of the present application further provides a storage medium on which a computer program is stored, wherein the computer program, when executed by a processor, implements the method provided in the above embodiment of the present application.

[0096] In addition, an embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the method provided in the above embodiment of the present application.

[0097] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0098] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0099] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0100] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A food extraction method, characterized in that: Applied to an extraction device, the extraction device comprises a pulse electric field control module, an extraction chamber, a first electrode, a second electrode and a temperature sensor, the first electrode and the second electrode are arranged in the extraction chamber with relative spacing, the temperature sensor is arranged in the extraction chamber, the pulse electric field control module is electrically connected to the first electrode, the second electrode and the temperature sensor respectively, and the method comprises: Controlling the pulse electric field control module to apply a voltage signal of a target electric field strength between the first electrode and the second electrode, so that the extractable food and liquid in the extraction chamber are in the target electric field between the first electrode and the second electrode; Acquiring a temperature value of the temperature sensor, and controlling the closing and opening of the voltage signal according to the temperature value of the temperature sensor, so that the temperature value in the extraction chamber is within a preset temperature range; When it is determined that the preset extraction stop condition is met, the application of the voltage signal to the first electrode and the second electrode is stopped.

2. The method according to claim 1, characterized in that When it is determined that a preset extraction stop condition is met, controlling to stop applying the voltage signal to the first electrode and the second electrode comprises: The pulse electric field control module detects the voltage difference between the first electrode and the second electrode and the current of extractable food and liquid flowing between the first electrode and the second electrode; Determining the electrical conductivity of the extractable food material and the liquid based on the voltage difference and the current; When the conductivity is greater than or equal to a set conductivity threshold, the control stops applying the voltage signal to the first electrode and the second electrode.

3. The method according to claim 2, characterized in that The conductivity threshold value ranges from 0.0025 to 0.01 S / cm.

4. The method according to claim 1, characterized in that When it is determined that a preset extraction stop condition is met, controlling to stop applying the voltage signal to the first electrode and the second electrode comprises: The pulse electric field control module starts timing when applying the voltage signal to the first electrode and the second electrode; When the timing duration is greater than the set extraction duration, the control stops applying the voltage signal to the first electrode and the second electrode.

5. The method according to claim 4, characterized in that The set extraction time ranges from 1 min to 5 min.

6. The method according to claim 1, characterized in that According to the temperature value of the temperature sensor, controlling the voltage signal to be turned off and on so that the temperature value of the temperature sensor is within a preset temperature range includes: The pulse electric field control module stops applying the voltage signal when the temperature value of the temperature sensor is higher than the upper temperature limit of a preset temperature range; When the temperature value of the temperature sensor is lower than the lower limit temperature value of the preset temperature interval, the operation of resuming the application of the voltage signal is performed.

7. The method according to claim 1, characterized in that The extractable food material is tea leaves, the extraction device further comprises a refrigeration module in contact with the extraction chamber, the refrigeration module is electrically connected to the pulse electric field control module, and after the pulse electric field control module controls the step of applying a voltage signal of a target electric field strength between the first electrode and the second electrode, the method further comprises: The pulse electric field control module controls the refrigeration module to start refrigerating the extraction chamber; When it is determined that the temperature value of the temperature sensor is lower than a set temperature threshold or the working time of the refrigeration module is longer than a set time threshold, the refrigeration module is controlled to stop refrigeration.

8. The method according to claim 7, characterized in that The step of the pulse electric field control module controlling the refrigeration module to start refrigerating the extraction chamber includes: Based on the situation that the pulse electric field control module stops applying the voltage signal, controlling the refrigeration module to start refrigerating the extraction chamber; or, Based on the pulse electric field control module applying the voltage signal, the pulse electric field control module detects the voltage difference between the first electrode and the second electrode and the current value passing through the extractable food and liquid between the first electrode and the second electrode; When the ratio of the current value to the voltage difference is greater than or equal to a preset threshold, the refrigeration module is controlled to start cooling the extraction chamber.

9. The method according to any one of claims 1 to 8, characterized in that: The first electrode and the second electrode are spaced apart along upper and lower sides of the extraction chamber, and the step of controlling the pulse electric field control module to apply a voltage signal of a target electric field strength between the first electrode and the second electrode comprises: An electrical signal is generated according to the electrical connection between the pulse electric field control module and the first electrode or the second electrode, and the pulse electric field control module is controlled to apply a voltage signal of a target electric field strength between the first electrode and the second electrode, wherein the voltage signal is output in a pulse, a pulse duty cycle is less than 0.025, a maximum voltage is less than 2000V, and a maximum current is less than 50A.

10. An extraction device, characterized in that: The extraction device includes a pulse electric field control module, an extraction chamber, a first electrode, a second electrode and a temperature sensor. The first electrode and the second electrode are arranged in the extraction chamber with relative intervals. The temperature sensor is arranged in the extraction chamber. The pulse electric field control module is electrically connected to the first electrode, the second electrode and the temperature sensor, respectively. The pulse electric field control module is used to execute the method described in any one of claims 1 to 9.

11. The extraction device according to claim 10, characterized in that The first electrode and the second electrode are arranged relatively spaced apart along the left and right sides, or the upper and lower sides, of the extraction chamber.

12. The extraction device according to claim 11, characterized in that The first electrode and the second electrode are arranged relatively spaced apart along upper and lower sides of the extraction chamber, and include: The first electrode is connected to the top of the extraction chamber through a retractable rod, a surface of the first electrode is provided with a plurality of through holes, and the second electrode is provided at the bottom of the extraction chamber. The method further comprises: During the process of applying the voltage signal, if the pulse electric field control module detects that there is no electric signal between the first electrode and the second electrode, the pulse electric field control module controls the retractable rod to extend to a preset length to drive the first electrode to move downward until the electric signal is detected between the first electrode and the second electrode.

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