Control method of unfreezing device and unfreezing device

Abstract

The invention discloses a control method of an unfreezing device and the unfreezing device, the unfreezing device comprises an unfreezing cavity, an air exhaust part, a heating cavity and a heating part, the unfreezing cavity is communicated with the heating cavity, the air exhaust part is connected with the unfreezing cavity, the control method comprises the following steps: controlling the air exhaust part to extract air in the unfreezing cavity; controlling the heating part to heat the liquid in the heating cavity at a first preset power so as to heat the to-be-unfrozen article in the unfreezing cavity through steam; and adjusting the pressure value in the unfreezing cavity so as to unfreeze the to-be-unfrozen article in the unfreezing cavity through the change of the pressure value. According to the control method of the unfreezing device, the unfreezing speed of the unfreezing device can be increased, and the influence on the quality of unfrozen objects is small.

Description

Technical Field

[0001] The present application relates to the field of thawing technology, and in particular to a control method for a thawing device and a thawing device. Background Art

[0002] Refrigerators can be used to preserve and freeze food. When people purchase a large amount of food, they do not need to worry about the food going bad, which brings great convenience to people's lives. However, frozen food needs to be thawed before it can be processed and cooked.

[0003] Currently, there are two methods for thawing food: air thawing and water thawing. The existing thawing methods are time-consuming and make the food easy to breed bacteria. Summary of the invention

[0004] The present application provides a control method for a thawing device and a thawing device to solve the technical problem in the prior art that the thawing method is time-consuming and makes it easy for bacteria to grow on food.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a control method for a thawing device, which is applied to the thawing device, and the thawing device includes: a thawing cavity, an exhaust part, a heating cavity and a heating part, the thawing cavity is connected to the heating cavity, and the exhaust part is connected to the thawing cavity, and the control method includes: controlling the exhaust part to extract the gas in the thawing cavity; controlling the heating part to heat the liquid in the heating cavity with a first preset power, so as to heat the thawing cavity through steam; adjusting the pressure value in the thawing cavity, so as to thaw the items to be thawed in the thawing cavity through changes in the pressure value.

[0006] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a thawing device, the thawing device includes: a thawing cavity, a heating part and a heating cavity, an exhaust part, and a controller, the thawing cavity is used to place the items to be thawed; the heating cavity is connected to the thawing cavity, and the heating part is used to heat the heating cavity, wherein the heating cavity and the thawing cavity are the same cavity or the two are different cavities; the exhaust part is connected to the thawing cavity, and is used to extract the gas in the thawing cavity; the controller is connected to the heating part and the exhaust part, and is used to execute the control method of any of the above embodiments.

[0007] Beneficial effects of the present application: Different from the prior art, the control method of the thawing device of the present application includes: controlling the exhaust part to extract the gas in the thawing cavity; controlling the heating part to heat the liquid in the heating cavity with a first preset power, so as to heat the items to be thawed in the thawing cavity through steam; adjusting the pressure value in the thawing cavity, so as to thaw the items to be thawed in the thawing cavity through the change of the pressure value. The control method of the present application is simple, and can heat the items to be thawed by low-temperature steam, so that the items to be thawed are heated evenly. In addition, by adjusting the pressure value in the thawing cavity, the items to be thawed in the thawing cavity can expand and contract, similar to the effect of breathing, so that the heat can be better transferred to the inside of the items to be thawed, and the thawing speed is accelerated. Moreover, the changes in temperature and pressure will also change the flow rate of the steam airflow, thereby forming turbulence, further accelerating the heat exchange with the items to be thawed, and improving the thawing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0009] Figure 1 It is a schematic diagram of a framework of an embodiment of a thawing device provided by the present application;

[0010] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of the thawing device provided by the present application;

[0011] Figure 3 It is a flow chart of an embodiment of a control method of a thawing device provided by the present application;

[0012] Figure 4 yes Figure 3 A schematic flow chart of an embodiment of step S11;

[0013] Figure 5 yes Figure 3 A schematic flow chart of an embodiment of step S12;

[0014] Figure 6 yes Figure 3 A schematic flow chart of an embodiment of step S13;

[0015] Figure 7 yes Figure 3 A schematic flow chart of another embodiment of step S13;

[0016] Figure 8 yes Figure 3A schematic flow chart of another embodiment of step S13;

[0017] Fig. 9 yes Figure 3 FIG. 1 is a flow chart of another embodiment of step S13 in FIG. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0019] The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The freezer compartment of a household refrigerator can be used to store food that is not to be eaten in the short term and to maintain the quality of the food. Frozen food needs to be thawed before cooking or eating. The present application provides a thawing device and a control method thereof, which can thaw food items waiting to be thawed, with a short thawing time and little impact on the quality of the items to be thawed. The thawing device and the control method of the thawing device provided by the present application will be introduced in detail below.

[0022] See also Figure 1 and Figure 2 As shown, Figure 1 is a schematic diagram of a framework of an embodiment of a thawing device provided by the present application, Figure 2It is a three-dimensional structural schematic diagram of an embodiment of the thawing device provided in the present application. Specifically, the thawing device 10 includes: a thawing cavity 11, an exhaust portion 12, a heating cavity 13 and a heating portion 14.

[0023] The thawing cavity 11 is used for placing items to be thawed, and the items to be thawed may be food materials such as meat and seafood.

[0024] The air extraction unit 12 is connected to the thawing cavity 11 and is used to extract the gas in the thawing cavity 11 to provide a negative pressure environment for the thawing cavity 11 and increase the negative pressure value in the thawing cavity 11. The air extraction unit 12 may be an air pump.

[0025] The heating cavity 13 is used to place liquid, and the heating part 14 is connected to the heating cavity 13. The heating part 14 is used to heat the liquid in the heating cavity 13. The liquid generates steam after being heated, so as to heat the items to be thawed by the steam. The liquid in the heating cavity 13 can be liquids such as water and vinegar. The steam is used to heat the items to be thawed, so that the items to be thawed are heated more evenly and the thawing speed is accelerated.

[0026] The exhaust unit 12 extracts the gas in the thawing cavity 11 to reduce the negative pressure value in the thawing cavity 11 and the heating cavity 13. The liquid in the heating cavity 13 has a low boiling point under negative pressure. Therefore, the heating unit 14 heats the liquid in the heating cavity 13 to obtain low-temperature steam. Heating the items to be thawed by low-temperature steam will not cause color change, nutritional loss, quality degradation, etc. to the items to be thawed. For example, the low-temperature steam can be water vapor at 20 degrees Celsius to 30 degrees Celsius, which is the same as the ambient temperature, so that the nutrients of the food are not easily lost.

[0027] Further, in Figure 1 In the illustrated embodiment, the heating cavity 13 and the thawing cavity 11 may be different cavities, and the heating cavity 13 and the thawing cavity 11 are connected in series, and the steam in the heating cavity 13 can enter the thawing cavity 11 to heat the items to be thawed in the thawing cavity 11. In this way, the heating cavity 13 and the thawing cavity 11 are independently arranged to avoid mutual contamination between the liquid in the heating cavity 13 and the items to be thawed in the thawing cavity 11, and facilitate cleaning by the user.

[0028] In other embodiments, the heating cavity 13 and the thawing cavity 11 may also be the same cavity, that is, the two share the same cavity. In this way, the overall volume of the thawing device 10 can be reduced, saving the hardware cost of the thawing device 10.

[0029] Furthermore, if Figure 1 and Figure 2As shown, the thawing device 10 may further include a temperature measuring portion 16 , which is connected to the thawing cavity 11 and is used to measure the temperature in the thawing cavity 11 .

[0030] The thawing device 10 may further include a pressure measuring unit (not shown), which is connected to the thawing cavity 11 and is used to measure the current negative pressure value in the thawing cavity 11 .

[0031] Furthermore, if Figure 1 As shown, the thawing device 10 may further include a controller 15, which may be connected to the vacuum part 12, the heating part 14, the temperature measuring part 16 and the pressure measuring part respectively. The controller 15 may execute program instructions to implement the control method of the thawing device of any of the following embodiments, so that the thawing device 10 may intelligently thaw the items to be thawed in the thawing cavity 11.

[0032] The controller 15 may be a processor, and the controller 15 may be an integrated circuit chip with signal processing capability. The controller 15 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0033] The thawing device 10 of the present application has a simple structure and low cost. Low-temperature steam can be obtained through the heating part 14 and the exhaust part 12. The low-temperature steam enters the thawing cavity 11 to heat the items to be thawed, so that the surface of the items to be thawed is evenly heated, the thawing time of the items to be thawed is reduced, and the thawing effect is improved. Moreover, the thawing process of the thawing device 10 is intelligently controlled by the controller 15, the thawing speed is faster, and the thawing effect is better. The control method of the thawing device 10 will be described in detail below.

[0034] See also Figure 3 As shown, Figure 3 : is a flow chart of an embodiment of a control method for a thawing device provided in the present application. Specifically, the control method for a thawing device includes:

[0035] S11: Control the air extraction unit to extract the gas in the thawing chamber.

[0036] After the thawing device is started, the controller can first control the air extraction unit to extract the gas in the thawing chamber to reduce the pressure value in the thawing chamber. Since the air extraction process of the air extraction unit takes a long time, the air extraction unit can be controlled to extract gas after the thawing device is started. In this way, the thawing time of the thawing device can be reduced.

[0037] In other embodiments, after the thawing device is started, the heating part can be controlled to heat the heating cavity first, and then the exhaust part can be controlled to exhaust the thawing cavity to obtain low-temperature steam, as long as low-temperature steam can be obtained.

[0038] In a specific embodiment, Figure 4 As shown, Figure 4 yes Figure 3 The flowchart of an embodiment of step S11 in the embodiment of FIG. 1 is as follows. Specifically, the step of extracting the gas in the thawing chamber by the gas extraction unit may include:

[0039] S111: Control the exhaust unit to exhaust air from the thawing chamber, and obtain the current negative pressure value or exhaust time of the thawing chamber.

[0040] After the thawing device is turned on, the controller controls the exhaust part to exhaust air from the thawing cavity to reduce the pressure in the thawing cavity and form a negative pressure environment in the thawing cavity.

[0041] The current negative pressure value in the thawing cavity is obtained. Specifically, the controller can measure the negative pressure value in the thawing cavity through the pressure measuring unit to obtain the current negative pressure value in the thawing cavity. The current negative pressure value in the thawing cavity can be compared with the preset negative pressure value. If the current negative pressure value in the thawing cavity is greater than or equal to the preset negative pressure value, step S12 is executed. If the current negative pressure value in the thawing cavity is less than the preset negative pressure value, step S112 is executed.

[0042] Among them, the preset negative pressure value can be: -90kpa, -85kpa, -95kpa, etc. The specific value of the preset negative pressure value can be set according to the type of items to be thawed, and is not specifically limited here.

[0043] After the air extraction unit is turned on, the air extraction time of the air extraction unit for the thawing chamber can also be counted. The air extraction time is compared with the preset second time length. If the air extraction time is greater than the preset second time length, step S12 is executed. If the air extraction time is less than or equal to the preset second time length, step S112 is executed.

[0044] The second preset time length may range from 30s to 120s. For example, the second preset time length may be 30s, 50s, 70s, 100s, etc. The specific value of the second preset time length may be set according to the actual demand for negative pressure and is not specifically limited here.

[0045] S112: In response to the current negative pressure value of the thawing chamber being less than the preset negative pressure value, or the exhaust time being less than the second preset time length, the process returns to executing the step of controlling the exhaust unit to exhaust air from the thawing chamber.

[0046] If the current negative pressure value of the thawing cavity is less than the preset negative pressure value, it means that the negative pressure in the thawing cavity is small, and the controller controls the air extraction part to continue to extract air, so that the current negative pressure value in the thawing cavity is greater than or equal to the preset negative pressure value, and then the heating part is turned on to heat the heating cavity. In this way, the temperature of the steam can be effectively controlled to reduce the impact on the quality of the items to be thawed.

[0047] In other embodiments, if the vacuum time of the vacuum unit is less than a second preset time, it means that the negative pressure in the thawing chamber is small. The controller can control the vacuum unit to continue vacuuming until the vacuum time is greater than or equal to the second preset time, and then control the heating unit to work.

[0048] S12: Controlling the heating unit to heat the liquid in the heating cavity at a first preset power, so as to heat the thawing cavity through steam.

[0049] After vacuum extraction is performed on the thawing cavity, the thawing cavity has a negative pressure environment. The controller can control the heating part to heat the heating cavity with a first preset power to form low-temperature steam. The low-temperature steam enters the thawing cavity and liquefies after encountering the low-temperature object to be thawed. The steam releases heat during the liquefaction process to heat the object to be thawed. By heating the object to be thawed with steam, the surface of the object to be thawed can be heated evenly, thereby improving the thawing effect of the thawing device.

[0050] Under negative pressure environment, the boiling point of liquid will be lowered, and the heating part heats the liquid in the heating cavity to obtain low-temperature steam. By heating the thawing cavity with low-temperature steam, the impact on the quality of the items to be thawed can be reduced and the reliability of the thawing device can be improved.

[0051] In some specific embodiments, Figure 5 As shown, Figure 5 yes Figure 3 The flowchart of an embodiment of step S12 in the embodiment of FIG. 1 is as follows. Specifically, the step of controlling the heating unit to heat the liquid in the heating chamber with a first preset power may include:

[0052] S121: In response to the current negative pressure value of the thawing chamber being greater than or equal to the preset negative pressure value, or the vacuum time being greater than or equal to the second preset time length, the heating unit is controlled to heat the liquid in the heating chamber at a first preset power, and the current temperature value in the thawing chamber is obtained.

[0053] When the current negative pressure value of the thawing chamber is greater than or equal to the preset negative pressure value or the air extraction time is greater than or equal to the second preset time, the controller controls the heating unit to heat the liquid in the heating chamber with the first preset power. In this way, the maximum value of the steam temperature can be effectively controlled to reduce the impact on the quality of the items to be thawed.

[0054] The first preset power may range from 100 to 800 W, for example, the first preset power may be 100 W, 200 W, 500 W or 800 W, etc. The first preset power may be a relatively large power so that the thawing cavity can be heated quickly.

[0055] After the heating unit heats the heating cavity, the controller can obtain the current temperature value in the thawing cavity through the temperature measuring unit. After obtaining the current temperature value in the thawing cavity, the current temperature value in the thawing cavity can be compared with the preset temperature value.

[0056] When the current temperature value in the thawing chamber is less than the preset temperature value, it means that the temperature in the thawing chamber is still low, so the controller continues to control the heating unit to heat the heating unit at the first preset power. When the current temperature value in the thawing chamber is greater than or equal to the preset temperature value, step S122 is executed.

[0057] Among them, the preset temperature value can be 30 degrees-55 degrees. For example, the preset temperature value can be 30 degrees, 35 degrees, 40 degrees, 50 degrees or 55 degrees, etc., and can be set specifically according to the properties of the items to be thawed.

[0058] S122: In response to the current temperature value in the thawing chamber being greater than or equal to the preset temperature value, determining whether the heating time of the heating part is greater than or equal to a third preset time period.

[0059] If the current temperature value in the thawing chamber is greater than or equal to the preset temperature value, the heating time of the heating part is then determined.

[0060] Specifically, the time for the heating unit to heat the heating cavity at the first preset power is obtained. When it is confirmed that the heating time of the heating unit is less than the third preset time, the process returns to step S121 to continue controlling the heating unit to heat the heating cavity at the first preset power. When it is confirmed that the heating time of the heating unit is greater than or equal to the third preset time, step S123 is executed.

[0061] The third preset time can be 5-20 minutes. For example, the third preset time can be 5 minutes, 10 minutes, 15 minutes or 20 minutes, etc. The heating time of the heating part is greater than or equal to the third preset time, so that the items to be thawed can be fully heated, thereby improving the thawing efficiency of the items to be thawed.

[0062] S123: In response to the current temperature value in the thawing chamber being greater than or equal to the preset temperature value, and the heating time of the heating part being greater than a third preset time length, a step of adjusting the pressure value in the thawing chamber is performed.

[0063] When the current temperature in the thawing cavity is greater than or equal to the preset temperature, and the heating time of the heating part is greater than or equal to the third preset time, it means that the items to be thawed have been sufficiently heated, then step S13 can be entered to execute the step of adjusting the pressure value in the thawing cavity so that the pressure value in the thawing cavity changes, thereby speeding up the thawing speed of the items to be thawed.

[0064] S13: adjusting the pressure value in the thawing cavity, so as to thaw the objects to be thawed in the thawing cavity by changing the pressure value.

[0065] After heating the thawing cavity, the controller adjusts the pressure value in the thawing cavity to change the pressure value in the thawing cavity, so as to thaw the objects to be thawed in the thawing cavity through the change of the pressure in the thawing cavity.

[0066] Specifically, the pressure change in the thawing chamber can make the items to be thawed expand and contract, similar to the effect of breathing, which is conducive to the transfer of energy to the inside of the items to be thawed, thereby accelerating the thawing speed of the items to be thawed and greatly reducing the thawing time. In addition, the changes in pressure and temperature in the thawing chamber will also change the flow rate of the steam airflow, forming turbulence, thereby accelerating the heat exchange between the steam and the items to be thawed and improving the thawing effect.

[0067] Optionally, in some embodiments, when adjusting the pressure in the thawing chamber, the pressure value in the thawing chamber can be adjusted by adjusting the heating power and / or heating time of the heating unit. In other embodiments, the pressure value in the thawing chamber can also be adjusted by adjusting the working mode of the air extraction unit.

[0068] In some embodiments, Figure 6 As shown, Figure 6 yes Figure 3 The flowchart of an embodiment of step S13 in the embodiment of FIG. 1 is as follows. Specifically, adjusting the heating power and / or heating time of the heating unit to adjust the pressure value in the thawing chamber may include the following steps:

[0069] S131: Control the heating unit to heat the heating cavity at a second preset power and a first heating time.

[0070] When the controller adjusts the pressure value in the thawing cavity, the controller can control the heating part to heat the heating cavity with the second preset power and the first heating time.

[0071] Specifically, the second preset power may be smaller than the first preset power. The first preset power is relatively large so that the temperature in the thawing chamber can quickly reach a preset temperature value, and the second preset power is used to cause the temperature in the thawing chamber to fluctuate.

[0072] Furthermore, the second preset power may range from 50 to 300 W, and the first heating time may range from 5 to 30 seconds. By setting a shorter first heating time, the temperature in the thawing cavity may fluctuate continuously, thereby causing the pressure value in the thawing cavity to change continuously. For example, the controller controls the heating unit to heat the heating cavity at a power of 100 W for 10 seconds.

[0073] S132: Control the heating unit to heat the heating cavity at a third preset power and a second heating time.

[0074] The controller controls the heating part to heat the heating cavity with the second preset power for the first heating time, and then controls the heating part to heat the heating cavity with the third preset power and the second heating time.

[0075] The third preset power may also be less than the first preset power, for example, the third preset power may be 50-100w, and the second heating time may be 5-30s. For example, in this step, the controller may control the heating part to heat the heating cavity at a power of 80w for 10s.

[0076] The second preset power and the third preset power are both smaller than the first preset power, and are used to maintain the temperature in the thawing chamber to fluctuate within a certain range, thereby causing the pressure in the thawing chamber to fluctuate accordingly.

[0077] S133: In response to the sum of the first heating time and the second heating time being less than the first preset time, return to the step of controlling the heating unit to heat the heating cavity with the second preset power and the first heating time until the sum of all the first heating time and the second heating time is greater than or equal to the first preset time.

[0078] The controller may count the pressure adjustment time of the thawing chamber. In this embodiment, the pressure adjustment time is the sum of all the first heating time and the second heating time of the heating part.

[0079] When the pressure adjustment time of the thawing cavity is less than the first preset time, the process returns to the step of controlling the heating part to heat the heating cavity with the second preset power and the first heating time, and repeats this cycle until the sum of all the first heating times and all the second heating times (pressure adjustment time) is greater than or equal to the first preset time, then the heating is stopped and the thawing process ends.

[0080] The first preset time length may be 10-30 minutes, for example, the first preset time length may be 10 minutes, 20 minutes or 30 minutes, etc. The first preset time length is the shortest time for adjusting the pressure of the thawing cavity, and by reasonably setting the first preset time length, the items to be thawed in the thawing cavity can be fully thawed.

[0081] In this embodiment, when the controller adjusts the pressure in the thawing chamber, the heating power of the heating unit is controlled to switch back and forth between the second preset power and the third preset power, so that the temperature in the thawing chamber fluctuates, that is, a temperature difference is formed in the thawing chamber, so that the pressure in the thawing chamber fluctuates continuously, and in this way, the objects to be thawed are continuously compressed and expanded during the pressure adjustment period, thereby accelerating the thawing speed of the objects to be thawed. Moreover, the changes in pressure and temperature in the thawing chamber will also change the flow rate of the steam airflow, forming turbulence, thereby accelerating the heat exchange between the steam and the objects to be thawed, and improving the thawing effect.

[0082] In other embodiments, Figure 7 As shown, Figure 7 yes Figure 3 In another embodiment of step S13, specifically, adjusting the heating power and / or heating time of the heating unit to adjust the pressure value in the thawing chamber may also include:

[0083] S231: Control the heating unit to heat the heating cavity at a second preset power to obtain a current temperature value in the thawing cavity.

[0084] When the controller adjusts the pressure value in the thawing cavity, the controller can control the heating part to heat the heating cavity with a second preset power, wherein the second preset power is less than the first preset power, so as to adjust the temperature of the thawing cavity.

[0085] The second preset power may range from 50 to 300 W, and the second preset power may be 50 W, 100 W, 150 W or 300 W, etc. For example, when the controller adjusts the pressure value in the thawing cavity, it may control the heating part to heat the heating cavity with a power of 100 W.

[0086] When the heating unit heats the heating cavity with the second preset power, the controller can obtain the current temperature value in the thawing cavity. Specifically, the controller can obtain the current temperature value in the thawing cavity through the temperature measuring unit.

[0087] After the controller obtains the current temperature value of the thawing cavity, the current temperature value of the thawing cavity can be compared with the first preset temperature value to determine whether the current temperature value of the thawing cavity reaches the first preset temperature value. When it is confirmed that the current temperature value of the thawing cavity is less than the first preset temperature value, the heating unit continues to heat the heating cavity at the second preset power. When it is confirmed that the current temperature value of the thawing cavity is greater than or equal to the first preset temperature value, step S232 is entered.

[0088] S232: In response to the current temperature value in the thawing chamber being greater than or equal to the first preset temperature value, controlling the heating unit to stop heating until the current temperature value in the thawing chamber is less than the second preset temperature value.

[0089] When it is confirmed that the current temperature value of the thawing cavity is greater than or equal to the first preset temperature value, the heating part is controlled to stop heating to cool the thawing cavity until the current temperature value in the thawing cavity is less than the second preset temperature value.

[0090] Among them, the first preset temperature value is greater than the second preset temperature value, that is, the heating part heats first and then stops heating, so that the current temperature value in the thawing cavity first increases and then decreases. In this way, a temperature difference is formed in the thawing cavity, thereby changing the pressure in the thawing cavity.

[0091] S233: Obtaining the pressure adjustment time of the thawing chamber.

[0092] After the thawing cavity is pressure-regulated, the pressure regulation time of the thawing cavity is obtained. The pressure regulation time of this embodiment refers to the sum of the time when the heating part heats the heating cavity at the second preset power and the time when the heating part stops heating.

[0093] After obtaining the pressure adjustment time of the thawing chamber, the pressure adjustment time is compared with the first preset time. When the pressure adjustment time is less than the first preset time, it means that the thawing time is insufficient, and the process proceeds to step S234. When the pressure adjustment time is greater than or equal to the first preset time, the thawing time is sufficient and the thawing process ends.

[0094] The first preset time length may be 10-30 minutes, for example, the first preset time length may be 10 minutes, 20 minutes or 30 minutes, etc. The first preset time length is the shortest time for adjusting the pressure of the thawing cavity, and by reasonably setting the first preset time length, the items to be thawed in the thawing cavity can be fully thawed.

[0095] S234: In response to the pressure adjustment time being less than the first preset time, returning to the step of controlling the heating unit to heat the heating cavity at a second preset power until the pressure adjustment time is greater than or equal to the first preset time.

[0096] If the pressure adjustment time of the thawing cavity is less than the first preset time, indicating that the thawing time is insufficient, the process returns to step S231, i.e., returns to the step of controlling the heating part to heat the heating cavity at the second preset power, and repeats this cycle until the pressure adjustment time of the thawing cavity is greater than or equal to the first preset time.

[0097] In this embodiment, during the process of the controller regulating the pressure of the thawing cavity, the heating unit heats the heating cavity with the second preset power so that the current temperature value of the thawing cavity is greater than or equal to the first preset temperature value, and the heating unit stops heating until the current temperature value in the thawing cavity is less than the second preset temperature value, alternately, that is, the heating time of the heating unit is constantly changing, so that a temperature difference is constantly generated in the thawing cavity, the pressure in the thawing cavity is constantly changing, and the items to be thawed are alternately expanded and compressed, thus accelerating the thawing speed of the items to be thawed. Moreover, the changes in pressure and temperature in the thawing cavity will also change the flow rate of the steam airflow, forming turbulence, thereby accelerating the heat exchange between the steam and the items to be thawed, and improving the thawing effect.

[0098] In other embodiments, Figure 8 As shown, Figure 8 yes Figure 3 In another embodiment of step S13, specifically, adjusting the heating power and / or heating time of the heating unit to adjust the pressure value in the thawing chamber may also include:

[0099] S331: Obtain the current negative pressure value in the thawing chamber.

[0100] The air extraction unit extracts air from the thawing cavity to obtain the current negative pressure value in the thawing cavity. Specifically, the current negative pressure value in the thawing cavity can be obtained through the pressure measuring unit.

[0101] The current negative pressure value in the thawing cavity is compared with the first preset negative pressure value. If the current negative pressure value in the thawing cavity is less than the first preset negative pressure value, the air extraction unit is controlled to continue to extract air from the thawing cavity so that the current negative pressure value in the thawing cavity reaches the first preset negative pressure value. When the first negative pressure value in the thawing cavity reaches the first preset negative pressure value, step S332 is entered.

[0102] S332: In response to the current negative pressure value in the thawing chamber being greater than or equal to the first preset negative pressure value, controlling the heating unit to heat the heating chamber at a second preset power.

[0103] If the current negative pressure value in the thawing cavity is greater than or equal to the first preset negative pressure value, the heating part is controlled to heat the heating cavity at a second preset power, thereby reducing the negative pressure value in the thawing cavity so that the current negative pressure value in the thawing cavity fluctuates.

[0104] S333: In response to the current negative pressure value in the thawing chamber being less than the second preset negative pressure value, controlling the heating unit to stop heating until the current negative pressure value in the thawing chamber is greater than or equal to the first preset negative pressure value.

[0105] After the heating part heats the heating cavity with the second preset power, the current negative pressure value of the thawing cavity gradually decreases. When it is confirmed that the current negative pressure value in the thawing cavity is less than the second preset negative pressure value, the heating part is controlled to stop heating, and the exhaust part continues to exhaust the thawing cavity, thereby increasing the current negative pressure value in the thawing cavity until the negative pressure value in the thawing cavity is greater than or equal to the first preset negative pressure value.

[0106] The first preset negative pressure value is greater than the second preset negative pressure value. The current negative pressure value in the thawing chamber first reaches the first preset negative pressure value, then decreases to the second preset negative pressure value, and then increases to the first preset negative pressure value to form a pressure difference in the thawing chamber.

[0107] S334: Obtain the pressure adjustment time of the thawing chamber.

[0108] The adjustment time of the thawing chamber is obtained, which is the sum of the time when the heating part is heated at the second preset power and the time when the heating part stops heating when the pressure of the thawing chamber is adjusted.

[0109] When the pressure adjustment time of the thawing chamber is greater than or equal to the first preset time, it means that the thawing time is sufficient and the items to be thawed in the thawing chamber have been fully thawed, so the thawing process ends. When the pressure adjustment time is less than the first preset time, step S335 is entered.

[0110] The first preset time length may be 10-30 minutes, for example, the first preset time length may be 10 minutes, 20 minutes or 30 minutes, etc. The first preset time length is the shortest time for adjusting the pressure of the thawing cavity, and by reasonably setting the first preset time length, the items to be thawed in the thawing cavity can be fully thawed.

[0111] S335: In response to the pressure adjustment time being less than the first preset time, returning to the step of obtaining the current negative pressure value in the thawing chamber until the pressure adjustment time is greater than or equal to the first preset time.

[0112] When the pressure adjustment time is less than the first preset time, the process returns to step S331 to detect again whether the current negative pressure value in the thawing chamber is greater than or equal to the first preset negative pressure value. The process is repeated until the pressure adjustment time in the thawing chamber is greater than or equal to the first preset time, so that the items to be thawed are fully thawed.

[0113] In this embodiment, when the pressure of the thawing cavity is adjusted, the heating unit is controlled to heat the heating cavity with a second preset power to reduce the current negative pressure value of the thawing cavity, and the heating unit stops heating to allow the exhaust unit to increase the current negative pressure value of the thawing cavity, and the pressure value in the thawing cavity changes alternately, so that the objects to be thawed shrink and expand in the thawing cavity, and the thawing speed of the objects to be thawed is accelerated. Moreover, the changes in pressure and temperature in the thawing cavity will also change the flow rate of the steam airflow, forming turbulence, thereby accelerating the heat exchange between the steam and the objects to be thawed, and improving the thawing effect.

[0114] In other embodiments, the working mode of the air extraction unit can be adjusted to change the current negative pressure value in the thawing chamber, thereby adjusting the pressure value in the thawing chamber.

[0115] Specifically, for example, in some embodiments, the air extraction unit can be adjusted to open or close according to a preset rule to adjust the pressure value in the thawing chamber. In other embodiments, the air extraction power of the air extraction unit, the air extraction volume of the air extraction unit, etc. can also be adjusted to adjust the pressure value in the thawing chamber.

[0116] In other embodiments, Fig. 9 As shown, Fig. 9 yes Figure 3 In another embodiment of step S13, specifically, adjusting the air extraction part to open or close according to a preset rule to adjust the pressure value in the thawing chamber may also include:

[0117] S431: Controlling the air extraction unit to extract the gas in the thawing chamber until the current negative pressure value in the thawing chamber is greater than the first preset negative pressure value.

[0118] The controller controls the air extraction part to extract the gas in the thawing chamber so that the current negative pressure value in the thawing chamber can be greater than the first preset negative pressure value.

[0119] Specifically, the control unit obtains the current negative pressure value in the thawing chamber. When it is confirmed that the current negative pressure value in the thawing chamber is less than the first preset negative pressure value, the exhaust unit is controlled to continue to extract the gas in the thawing chamber. When it is confirmed that the current negative pressure value in the thawing chamber is greater than or equal to the first preset negative pressure value, step S432 is executed.

[0120] S432: Control the vacuum unit to stop vacuuming until the current negative pressure value in the thawing chamber is less than the second preset negative pressure value.

[0121] When the current negative pressure value in the thawing cavity reaches the first preset negative pressure value, the controller controls the air extraction unit to stop extracting air. At this time, since the heating unit continues to heat the heating cavity, the current negative pressure value in the thawing cavity gradually decreases until the current negative pressure value in the thawing cavity is less than the second preset negative pressure value.

[0122] The second preset negative pressure value is less than the first preset negative pressure value, that is, after the current negative pressure value in the thawing chamber reaches the first preset negative pressure value, it decreases to be less than the second preset negative pressure value, so as to form a pressure difference in the thawing chamber, thereby changing the pressure value in the thawing chamber.

[0123] S433: Obtain the pressure adjustment time of the thawing chamber.

[0124] Obtain the pressure adjustment duration of the thawing cavity. The pressure adjustment duration here refers to the sum of the time it takes for the thawing cavity to be evacuated by the vacuum part until the current negative pressure value in the thawing cavity reaches a first preset negative pressure value and the time it takes for the vacuum part to stop evacuating.

[0125] When the pressure adjustment time of the thawing chamber is greater than or equal to the first preset time, it means that the thawing time is sufficient and the items to be thawed in the thawing chamber have been fully thawed, so the thawing process ends. When the pressure adjustment time of the thawing chamber is less than the first preset time, step S434 is entered.

[0126] The first preset time length may be 10-30 minutes, for example, the first preset time length may be 10 minutes, 20 minutes or 30 minutes, etc. The first preset time length is the shortest time for adjusting the pressure of the thawing cavity, and by reasonably setting the first preset time length, the items to be thawed in the thawing cavity can be fully thawed.

[0127] S434: In response to the pressure adjustment time being less than the first preset time, the process returns to the step of controlling the vacuum unit to extract gas from the thawing chamber until the current negative pressure value in the thawing chamber is greater than the first preset negative pressure value, until the pressure adjustment time is greater than or equal to the first preset time.

[0128] When the pressure adjustment time is less than the first preset time, indicating that the thawing time is insufficient, the process returns to step S431, and the vacuum unit is controlled again to extract the gas in the thawing chamber until the current negative pressure value in the thawing chamber is greater than the first preset negative pressure value. This process is repeated until the pressure adjustment time is greater than or equal to the first preset time.

[0129] In this embodiment, when the pressure of the thawing cavity is adjusted, the pressure value in the thawing cavity is changed alternately by controlling the air extraction part to extract the gas in the thawing cavity and stop the air extraction alternately, so as to adjust the pressure in the thawing cavity. The items to be thawed are constantly contracted and expanded in the thawing cavity, which speeds up the thawing speed of the items to be thawed. The thawing device of this embodiment adjusts the pressure value in the thawing cavity by controlling the opening and closing of the air extraction part, and the control process is simple. Moreover, the changes in pressure and temperature in the thawing cavity will also change the flow rate of the steam airflow, forming turbulence, thereby accelerating the heat exchange between the steam and the items to be thawed and improving the thawing effect.

[0130] In summary, in the control method of the thawing device of the present application, the items to be thawed are thawed by low-temperature steam, so that the items to be thawed are heated evenly and the influence on the quality of the items to be thawed can be reduced. The pressure value in the thawing chamber is adjusted by changing the heating power, heating time, temperature, vacuum pressure, etc., so that the items to be thawed in the thawing chamber expand and contract, similar to the breathing effect, so that the heat is better transferred to the inside of the items to be thawed, and the thawing speed of the items to be thawed is accelerated. In addition, the changes in temperature and pressure in the thawing chamber will also change the flow rate of the steam airflow, forming turbulence, thereby accelerating the heat exchange with the items to be thawed, and the thawing effect will be better.

[0131] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A control method for a thawing device, characterized in that: The thawing device comprises: a thawing cavity, an air extraction unit, a heating cavity and a heating unit, the thawing cavity is communicated with the heating cavity, the air extraction unit is connected with the thawing cavity, and the control method comprises: Controlling the gas extraction unit to extract gas from the thawing chamber; Controlling the heating unit to heat the liquid in the heating cavity at a first preset power, so as to heat the thawing cavity through steam; The pressure value in the thawing cavity is adjusted so as to thaw the objects to be thawed in the thawing cavity by changing the pressure value.

2. The control method according to claim 1, characterized in that: Adjusting the pressure value in the thawing chamber includes: The heating power and / or heating time of the heating unit are adjusted to adjust the pressure value in the thawing chamber.

3. The control method according to claim 2, characterized in that: The step of adjusting the heating power and / or heating time of the heating unit to adjust the pressure value in the thawing chamber includes: Controlling the heating unit to heat the heating cavity at a second preset power and a first heating duration; Controlling the heating unit to heat the heating cavity at a third preset power and a second heating duration; In response to the sum of the first heating time and the second heating time being less than the first preset time, the step of controlling the heating part to heat the heating cavity with the second preset power and the first heating time is returned to execute until the sum of all the first heating time and the second heating time is greater than or equal to the first preset time.

4. The control method according to claim 3, characterized in that: The first preset power is greater than the second preset power, and the first preset power is greater than the third preset power.

5. The control method according to claim 2, characterized in that: The step of adjusting the heating power and / or heating time of the heating unit to adjust the pressure value in the thawing chamber includes: Controlling the heating unit to heat the heating cavity at a second preset power to obtain a current temperature value in the thawing cavity; In response to the current temperature value in the thawing chamber being greater than or equal to the first preset temperature value, the heating unit is controlled to stop heating until the current temperature value in the thawing chamber is less than the second preset temperature value, Obtaining the pressure adjustment time of the thawing chamber; In response to the pressure adjustment time being less than the first preset time, the step of controlling the heating part to heat the heating cavity at a second preset power is returned to be executed until the pressure adjustment time is greater than or equal to the first preset time.

6. The control method according to claim 2, characterized in that: The step of adjusting the heating power and / or heating time of the heating unit to adjust the pressure value in the thawing chamber includes: Obtaining the current negative pressure value in the thawing chamber; In response to a current negative pressure value in the thawing chamber being greater than or equal to a first preset negative pressure value, controlling the heating unit to heat the heating chamber at a second preset power; In response to the current negative pressure value in the thawing chamber being less than a second preset negative pressure value, controlling the heating unit to stop heating until the current negative pressure value in the thawing chamber is greater than or equal to the first preset negative pressure value; Obtaining the pressure adjustment time of the thawing chamber; In response to the pressure adjustment time being less than the first preset time, the step of obtaining the current negative pressure value in the thawing chamber is returned to be executed until the pressure adjustment time is greater than or equal to the first preset time.

7. The control method according to claim 1, characterized in that: Adjusting the pressure value in the thawing chamber includes: The air extraction part is adjusted to open or close according to a preset rule to adjust the pressure value in the thawing chamber.

8. The control method according to claim 7, characterized in that: The step of adjusting the air extraction part to open or close according to a preset rule to adjust the pressure value in the thawing chamber includes: Controlling the gas extraction unit to extract gas from the thawing chamber until a current negative pressure value in the thawing chamber is greater than a first preset negative pressure value; Controlling the air extraction unit to stop extracting air until the current negative pressure value in the thawing chamber is less than a second preset negative pressure value; Obtaining the pressure adjustment time of the thawing chamber; In response to the pressure adjustment time being less than the first preset time, the process returns to executing the step of controlling the vacuum unit to extract the gas in the thawing chamber until the current negative pressure value in the thawing chamber is greater than the first preset negative pressure value, until the pressure adjustment time is greater than or equal to the first preset time.

9. The control method according to claim 1, characterized in that: The step of controlling the gas extraction unit to extract the gas in the thawing chamber includes: Controlling the exhaust unit to exhaust air from the thawing cavity, and obtaining a current negative pressure value or exhaust time of the thawing cavity; In response to the current negative pressure value of the thawing chamber being less than the preset negative pressure value, or the air extraction time being less than the second preset time length, returning to the step of controlling the air extraction unit to extract air from the thawing chamber; The heating unit is controlled to heat the liquid in the heating chamber at a first preset power. include, In response to the current negative pressure value of the thawing chamber being greater than or equal to the preset negative pressure value, or the air extraction time being greater than or equal to the second preset time length, controlling the heating unit to heat the liquid in the heating chamber with the first preset power, and obtaining the current temperature value in the thawing chamber; In response to the current temperature value in the thawing chamber being greater than or equal to the preset temperature value, and the heating time of the heating part being greater than a third preset time length, a step of adjusting the pressure value in the thawing chamber is performed.

10. A thawing device, characterized in that: The thawing device comprises: A thawing cavity, used for placing items to be thawed; A heating part and a heating cavity, wherein the heating cavity is connected to the thawing cavity, the heating part is used to heat the heating cavity, and the heating cavity and the thawing cavity are the same cavity or different cavities; An air extraction unit connected to the thawing cavity and used for extracting gas in the thawing cavity; A controller is connected to the heating part and the exhaust part, and is used to execute the control method according to any one of claims 1 to 9.

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